WO2008078044A2 - Glue dispensing device, gluing method, insulation glazing and spacer thereof provided with glue - Google Patents

Glue dispensing device, gluing method, insulation glazing and spacer thereof provided with glue Download PDF

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Publication number
WO2008078044A2
WO2008078044A2 PCT/FR2007/052498 FR2007052498W WO2008078044A2 WO 2008078044 A2 WO2008078044 A2 WO 2008078044A2 FR 2007052498 W FR2007052498 W FR 2007052498W WO 2008078044 A2 WO2008078044 A2 WO 2008078044A2
Authority
WO
WIPO (PCT)
Prior art keywords
glue
needle
chamber
nozzle
head
Prior art date
Application number
PCT/FR2007/052498
Other languages
French (fr)
Other versions
WO2008078044A3 (en
Inventor
Jean-Pierre Douche
Original Assignee
Saint-Gobain Glass France
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint-Gobain Glass France filed Critical Saint-Gobain Glass France
Publication of WO2008078044A2 publication Critical patent/WO2008078044A2/en
Publication of WO2008078044A3 publication Critical patent/WO2008078044A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1015—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target
    • B05C11/1023—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target responsive to velocity of target, e.g. to web advancement rate
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/673—Assembling the units
    • E06B3/67326—Assembling spacer elements with the panes
    • E06B3/6733—Assembling spacer elements with the panes by applying, e.g. extruding, a ribbon of hardenable material on or between the panes

Definitions

  • the invention relates to a glue dispensing device and a gluing method, in particular for gluing an interlayer to a glazing unit for the manufacture of an insulating glazing unit.
  • the invention is more particularly interested in, but not limited to, an insulating glazing whose interlayer is integral with the slices of the glass sheets.
  • Such an insulating glazing unit is for example known from the patent application WO-A1-03040507.
  • the arrangement of the interlayer on the outside and on the edge of the glazing has the advantage in particular of increasing the visibility through the glazing with respect to a glazing whose interlayer is arranged between and against the inner faces of the sheets of glass. glass.
  • the assembly of the glass sheets is achieved by keeping the glass sheets spread on their edge and facing, by suitable means such as suction cups, while the interlayer is glued and pressed on the edge of the glazing by means of at least two pressure rollers each adapted to bear against each of the slices of the two sheets of glass, the interlayer having on the bonding surface an adhesive, of the glue type, deposited by distribution means just before the application of the interlayer against the glass.
  • the patent application WO 04/072424 proposes a tool-holder device which allows a tool to cooperate with at least a part of the periphery of the substrate. , bypassing said substrate quickly and without requiring a large reception space, the device being slaved to ensure the exact positioning of the tool relative to the substrate.
  • the tool holder supports the glue dispensing means which may for example consist of a gun delivering glue under pressure. Gun systems are known whose glue dosage is obtained by a volumetric pump of the volume transfer gear pump type. However, these devices are bulky and can not be housed in the tool holder used to bypass the substrate in the application given above as an example.
  • this volume transfer of the glue is sequenced by the pitch of the gears, which inadvertently favors the local shear of the glue, which can generate at the level of the continuous glue bead applied to the substrate shearing the cord, and not guaranteeing not in the end a perfect seal of the glazing.
  • a glue delivery system there is known a gun that delivers glue, not by mechanical control with volume transfer, but by pneumatic control.
  • Such a gun has a chamber which is fed with pressure glue and which has an outlet nozzle for the glue.
  • a longitudinal pin arranged in the chamber is movable in translation, and is intended to close the nozzle when it comes to stopping the delivery of glue.
  • the outlet nozzle has a conical inlet which is intended to cooperate by pressing with the end of the spherical needle to stop the glue.
  • the needle is moved by a pneumatic cylinder of reduced stroke adapted to the necessary flow of glue delivery.
  • a safety spring is provided in case of a malfunction of the pneumatic control circuit to immediately close the distribution of glue from the nozzle of the gun.
  • this gun is of the binary type, that is to say that the gun is either open or closed. Also, too early closure of the nozzle can lead to a lack of glue delivery, resulting in the deposit on the spacer of an insufficient amount of glue ultimately resulting in poor sealing of the glazing. Conversely, a closure that is not fast enough leads to an excess thickness of adhesive deposited on the interlayer which generates pollution and aesthetic defects for the glazing.
  • this type of gun does not allow a progressivity in the delivery of the glue and homogeneity of the deposit, progressivity and homogeneity which are nevertheless necessary because of certain parameters which are in particular the speed of delivery of the interlayer ( speed of scrolling from 15 m / min to 25 m / min), the rather high viscosity of the adhesive (100 to 300 Pa / s), the need for a low flow (of the order of 2 to 5 g of glue per linear meter, ie a flow rate of 30 to 125 g / min), and a very short response time (of the order of 10 ms).
  • the speed of the interlayer is indeed variable and adapted to the type of contour of the glazing (polygonal shape or curve); in particular at the angles of the glazing when it presents, the circumvention of the angles is less rapid than the follow-up of a straight line.
  • it is necessary to immediately stop the delivery of glue without causing under or overdosing, which is not achievable with such a gun.
  • the purpose of the invention is therefore to provide a glue dispensing device which makes it possible to control the quantity of glue to be deposited in order to control in the process of gluing an interlayer to a glazing unit, the homogeneity of the adhesive bead according to the delivery rate of the substrate on which the glue is deposited, in the stabilized phase of the substrate (constant speed), or in the acceleration or deceleration phase for singular points of the product, such as a glazing, against which the glued substrate is reported.
  • the glue dispensing device for gluing an interlayer of an insulating glazing unit comprises a chamber which has an inlet supplying glue into said chamber and an outlet nozzle for dispensing glue out of the chamber, a needle which has a head and which is movable in translation in the chamber and is adapted to close the outlet nozzle, the outlet nozzle comprising an inlet located on the inner side of the chamber and against which is intended to press the head of the needle to close the nozzle, characterized in that the device comprises electronically controlled servocontrol means for controlling and controlling the position of the needle.
  • the needle is not movable sequentially, i.e. movable so that only two or three positions exist to freeze it in response to a manual order, but it is movable in response to an electronically controlled order so as to position it at exactly the desired location to deliver the expected flow.
  • the device comprises means for translational movement of the needle, such as a screw jack, which are external to the chamber and are associated with the end of the needle opposite the head.
  • the device comprises a motor which is intended to actuate the drive means in translation, while the electronically controlled servocontrol means comprise a speed variator which controls the motor.
  • the electronically controlled servocontrol means operate in a closed loop and comprise electronic control means which receive as input the position of the needle and control at the output of the speed controller, a setpoint speed or a target torque to be reached by engine.
  • the electronically controlled servocontrol means operate in a closed loop, the position of the needle being adapted in real time as a function of the desired flow rate of glue. At the position of the needle corresponds a motor speed or torque.
  • the speed or torque of the motor setpoint is meant for a given value of the glue feed rate in the chamber which depends on the pressure of the glue supply in the chamber and the rheological characteristics of the glue, related especially at its temperature.
  • the device of the invention advantageously comprises a pressure sensor which is located upstream of the glue supply inlet of the chamber, and a sensor of temperature which is arranged near the supply inlet of the chamber. The information from the pressure sensor or the temperature sensor is transmitted to the electronically controlled servocontrol means.
  • the electronically controlled servocontrol means comprise an absolute encoder which is capable of indicating to the electronic control means the position of the needle in the chamber.
  • An absolute encoder has the advantage of not requiring reference points when powering up the device, which allows secure use and systematically ensures the correct closed position when it comes to stop the distribution of the device. glue.
  • the device advantageously comprises a safety system for immediate closure of the nozzle.
  • the inlet orifice of the nozzle and the head of the needle adapted to cooperate with the inlet orifice each have a shape adapted to obtain a linearity of the flow of glue out of the chamber.
  • inlet orifice of the nozzle and the head of the needle adapted to cooperate with the inlet orifice have forms of mutual cooperation.
  • the inlet orifice of the nozzle preferably has a conical shape, while the head of the needle intended to cooperate with the inlet orifice of the nozzle has a surface of revolution and has a section whose tip is triangular.
  • the tip of the needle head has a rounded tip.
  • the device of the invention has all its usefulness for delivering a homogeneous adhesive bead at low flow rates, in particular between 30 and 125 g / min, or at a basis weight of between 2 and 5 g / ml.
  • Used to deposit glue on a substrate it is particularly suitable for managing acceleration and deceleration phases of the substrate when the latter is in motion while ensuring a volume continuity of the adhesive bead deposited.
  • this device is it advantageously used for gluing a spacer of an insulating glazing, in particular for gluing a flat interlayer against the slices of the glass sheets of an insulating glass.
  • the invention also relates to a method of depositing glue on a substrate by means of a device as claimed above.
  • the invention also relates to an insulating glazing unit comprising at least two sheets of glass and an interlayer ensuring the separation of the glass sheets, the interlayer being bonded to the glass sheets by presenting glue which is deposited on said interlayer according to the method of the invention.
  • the invention makes it possible to provide an adhesive deposit which is in the form of at least one continuous, homogeneous bead presenting no shear and having a grammage of 2 to 5 g / ml in a thickness not exceeding 0, 5 mm.
  • the invention thus provides an insulating glazing unit comprising at least two sheets of glass and an interlayer ensuring the separation of the glass sheets, the interlayer being secured to the outside of the glazing being adhered to the slices of the glass sheets, a glue bead being next to each slice of glass sheet.
  • FIG. 1 is a schematic sectional view of the adhesive dispensing device according to the invention
  • FIGS. 2a and 2b illustrate an exemplary embodiment of the shape of the head of the needle associated with a particular form of the inlet orifice of the glue dispensing nozzle, respectively in the open and closed positions of the nozzle
  • Figures 3a and 3b show an alternative embodiment of Figures 2a and 2b.
  • FIG. 1 illustrates a glue dispensing device 1, the arrival of the glue in the device being represented by the reference 2.
  • this device is advantageously applicable to the distribution of glue on a substrate requiring a controlled flow rate of material, in particular a weight of the order of 2 to 5 g of material per linear meter (ml) or a flow rate of 30 to 125 g / min and for a fairly viscous material (100 to 300 Pa / s), the substrate may or may not be in scrolling.
  • the device comprises a chamber 10 housing the glue 2 and a needle 20 movable in translation in the chamber 10.
  • the chamber 10 comprises an inlet 11 for supplying glue, at least one outlet nozzle 12 for delivering a bead of glue.
  • the outlet nozzle has an inlet port 13 on the inner side of the chamber which is substantially conical in shape.
  • the feed inlet 11 is connected to the outside of the chamber to a hose 11a connected upstream 11b to a glue supply pressure system not shown.
  • the pipe is sheathed by including an internal heating resistor so as to keep said pipe at the proper temperature in relation to the viscosity of the adhesive.
  • the needle 20 comprises an oblong body 21 and a head 22.
  • the head 22 is internal to the chamber and is opposite the inlet orifice 13.
  • the end 23 of the body, opposite the head 22, is external to the room.
  • the external end 23 is coupled to electronically controlled servocontrol means 3 which ensure the translation of the needle in the chamber 10 via drive means 4 and a motor 5.
  • the head 22 of the needle has a surface of revolution, and its end 22a is pointed.
  • the translation of the needle 20 in the direction of the outlet nozzle 12 engenders the engagement of the head 22 in the inlet orifice 13 of the nozzle, which will be named later the seat of the needle.
  • This translation causes depending on the position of the needle, a variation of the volume of glue useful in the nozzle, and therefore a variation in the flow of glue dispensed.
  • the proper position of the needle with respect to the inlet port controls the exact flow rate of dispensed glue.
  • the shape of the head 22 is adapted to mutually cooperate with the shape of the inlet orifice 13, the head 22 constituting a male element and perfectly matching the shape of the orifice 13 constituting the female element, so as to ensure sealing the nozzle when said head is fully supported against the seat surface.
  • the shape of the inlet orifice 13 as well as the shape of the head 22 of the needle also participate in the control of the flow of glue. Their shape ensures a glue flow that follows a linear working curve as a function of the needle position, which leads to a uniform deposition of glue on the receiving substrate.
  • FIGS. 2a and 2b illustrate an exemplary embodiment as to the shape of the head of the needle associated with a particular form of the inlet orifice of the nozzle, respectively in the open and closed positions of the nozzle.
  • Figures 3a and 3b correspond to an alternative embodiment.
  • the head 22 is given a section 22b of polygonal shape, the right segments cooperate mutually with the lines of the seat 13 so as to close the nozzle when the needle is fully depressed.
  • the end 22a of the head has a triangular section, and may be rounded tip ( Figure 2a or 3a).
  • the needle 20 must be moved in real time with respect to the required flow rate of glue at a given instant, which is achievable by an electronically controlled servocontrol of the needle by the means 3.
  • a set value of the glue flow rate is defined. This setpoint is set at electronic control means 30 which control the movement of the needle so as to position it at the exact location corresponding to the desired glue flow rate.
  • the outer end 23 of the needle is coupled to translation drive means 4, such as a screw jack, these driving means being driven by a motor 5 which is slaved to the electronic means 30 via a variable speed drive 31.
  • variable speed drive 31 manages in a closed loop the speed or the torque of the motor 5 so as to control the position of the needle in the chamber and consequently the flow rate of glue delivered.
  • the position of the needle is read using an absolute encoder 32, that is to say an encoder for which a reference position 0 is initially identified. and recorded in the electronic control means 30.
  • the position of the needle is supplied to a digital axis controller incorporated in the control means 30 which, depending on the position, generates and indicates to the variable speed drive 31 a set speed or a set torque to ensure the desired position of the needle.
  • speed mode when the drive controller acts on the speed of the motor. This mode is used when the needle is at a fixed position in the chamber to deliver a constant flow with the motor running at a constant speed. This speed mode is also used at the start of the glue dispensing device or in order to stop the device when passing respectively in transient acceleration or deceleration phases of glue removal on the substrate, the variation of motor speed causing the change of the position of the needle in the chamber and therefore altering the flow rate of glue delivered.
  • the needle is moved via the speed mode to the immediate vicinity of the seat, a position for which the variable speed drive switches to torque mode.
  • the torque mode is preferred when the flow must be modulated accurately over short distances, for example at the corners of the substrate to be bypassed.
  • the regulation of the rotation of the motor via the torque is preferred to ensure a more precise regulation of the position of the needle and therefore the flow of glue.
  • the flow rate is adjusted by the position of the needle as explained above but it is also strongly dependent on the pressure supplied upstream 11b of the flexible pipe 11 to feed the glue into the chamber.
  • This pressure which then corresponds to a glue flow rate entering the chamber 11, is related to the rheology of the glue.
  • a temperature change of the glue of the order of the degree modifies its viscosity, and if the pressure for feeding the glue remains unchanged, the flow rate at the outlet of the nozzle 12 is then modified. Therefore it is necessary to control the temperature of the glue in the chamber to provide a glue supply pressure adapted to the desired flow nozzle outlet, correlatively to the position of the needle.
  • All the members, in particular the flexible pipe, the chamber, the seat of the needle, the outlet orifice of the nozzle, which are in contact with the glue, are already maintained at a glue conditioning temperature in a range from 100 to 140 0 C, by means of electrical resistors inserted in said members which are made of a heat conducting material.
  • a temperature sensor 6 is disposed at the glue feed inlet 11 in the chamber 10.
  • a pressure sensor 7 is also provided upstream 11b of the hose 11a so as to provide an image of the viscosity of the glue.
  • a variation in temperature will correspond to a new temperature of the adhesive, for which at a given pressure of the adhesive, and at a given position of the needle, a value of flow at the nozzle outlet is predictable.
  • a safety system 8 for immediate closure of the nozzle 12 is provided independently of the needle 20 in order to immediately stop the distribution of glue in the event of malfunction of the control of the needle.
  • This security system is as already known, consisting of a closure valve which is actuated by a spring controlled by a jack in response to a trip command.
  • the device described above is particularly suitable for low volume flow rates (grammage of 2 to 5 g of material per linear meter), for small application sections (of the order of 2 mm in width and the order of 0.3 mm thick).
  • An exemplary embodiment without being limited thereto consists in depositing glue on a flat substrate of the aluminum strip type which is intended to form the interlayer of an insulating glazing unit, the interlayer to be glued on the slices of glass sheets of the glazing.
  • the glue is deposited in particular on the moving interlayer, the speed of travel of said interlayer being 15 m / min at 25 m / min.
  • the device of the invention thus makes it possible, in an extremely compact environment and the closest to the point of use and application of the glue, to provide a real-time dosing function, in particular for the transient phases of acceleration and deceleration of the interlayer in motion and therefore the deposition of glue.

Abstract

The invention relates to a glue dispensing device (1) including a chamber (10) with an inlet (11) for supplying the glue into the chamber and an outlet nozzle (12) for dispensing the glue out of the chamber, a pointer (20) having a head (22) and capable of translation displacement in the chamber (10) and capable of blocking the outlet nozzle (12), the outlet nozzle including an inlet opening (13) located on the inner side of the chamber and against which the head (22) of the pointer bears for closing the nozzle, characterised in that the device includes electronic-control driving means (3) for driving an controlling the position of the pointer (20).

Description

DISPOSITIF DE DISTRIBUTION DE COLLE ET PROCEDE DE COLLAGE, AINSI QUE VITRAGE ISOLANT ET SON INTERCALAIRE POURVU DE COLLE GLUE DELIVERY DEVICE AND METHOD OF BONDING, AND INSULATING GLAZING AND ITS INTERIOR WITH GLUE
L'invention concerne un dispositif de distribution de colle et un procédé de collage, en particulier pour coller un intercalaire sur un vitrage en vue de la fabrication d'un vitrage isolant. L'invention s'intéresse plus particulièrement, sans y être limitée, à un vitrage isolant dont l'intercalaire est solidaire des tranches des feuilles de verre.The invention relates to a glue dispensing device and a gluing method, in particular for gluing an interlayer to a glazing unit for the manufacture of an insulating glazing unit. The invention is more particularly interested in, but not limited to, an insulating glazing whose interlayer is integral with the slices of the glass sheets.
Un tel vitrage isolant est par exemple connu d'après la demande de brevet W0-A1 -03040507. La disposition de l'intercalaire à l'extérieur et sur la tranche du vitrage a l'avantage notamment d'augmenter la visibilité au travers du vitrage par rapport à un vitrage dont l'intercalaire est disposé entre et contre les faces internes des feuilles de verre.Such an insulating glazing unit is for example known from the patent application WO-A1-03040507. The arrangement of the interlayer on the outside and on the edge of the glazing has the advantage in particular of increasing the visibility through the glazing with respect to a glazing whose interlayer is arranged between and against the inner faces of the sheets of glass. glass.
L'assemblage des feuilles de verre, est réalisé en maintenant les feuilles de verre écartées sur leur chant et en regard, par des moyens adaptés tels que des ventouses, tandis que l'intercalaire est collé et pressé sur la tranche du vitrage au moyen d'au moins deux galets presseurs adaptés chacun à venir en appui contre chacune des tranches des deux feuilles de verre, l'intercalaire présentant sur la face de collage un adhésif, du type colle, déposé par des moyens de distribution juste avant l'application de l'intercalaire contre le verre.The assembly of the glass sheets, is achieved by keeping the glass sheets spread on their edge and facing, by suitable means such as suction cups, while the interlayer is glued and pressed on the edge of the glazing by means of at least two pressure rollers each adapted to bear against each of the slices of the two sheets of glass, the interlayer having on the bonding surface an adhesive, of the glue type, deposited by distribution means just before the application of the interlayer against the glass.
Pour assurer convenablement les étapes de préparation à l'assemblage et d'assemblage des verres, la demande de brevet WO 04/072424 propose un dispositif porte-outil qui permet à un outil, devant coopérer avec au moins une partie de la périphérie du substrat, de contourner ledit substrat de manière rapide et sans nécessiter un grand espace d'accueil, le dispositif étant asservi pour assurer le positionnement exact de l'outil par rapport au substrat. Pour le collage de l'intercalaire, le dispositif porte-outil supporte les moyens de distribution de colle qui peuvent par exemple consister en un pistolet délivrant de la colle sous pression. On connaît des systèmes à pistolet dont le dosage de la colle est obtenu par une pompe volumétrique de type pompe à engrenage par transfert de volume. Cependant ces équipements sont encombrants et ne peuvent pas être logés dans le dispositif porte-outil servant à contourner le substrat dans l'application donnée ci-dessus en exemple. En outre, ce transfert volumique de la colle est séquence par le pas des engrenages, ce qui favorise malencontreusement le cisaillement local de la colle, pouvant engendrer au niveau du cordon de colle continu appliqué sur le substrat un cisaillement du cordon, et en ne garantissant pas au final une étanchéité parfaite du vitrage. Pour agencer dans un faible volume un système de délivrance de colle, on connaît un pistolet qui délivre de la colle, non pas par pilotage mécanique avec transfert volumique, mais par pilotage pneumatique.To ensure suitably the preparation steps for assembling and assembling the glasses, the patent application WO 04/072424 proposes a tool-holder device which allows a tool to cooperate with at least a part of the periphery of the substrate. , bypassing said substrate quickly and without requiring a large reception space, the device being slaved to ensure the exact positioning of the tool relative to the substrate. For gluing the spacer, the tool holder supports the glue dispensing means which may for example consist of a gun delivering glue under pressure. Gun systems are known whose glue dosage is obtained by a volumetric pump of the volume transfer gear pump type. However, these devices are bulky and can not be housed in the tool holder used to bypass the substrate in the application given above as an example. In addition, this volume transfer of the glue is sequenced by the pitch of the gears, which inadvertently favors the local shear of the glue, which can generate at the level of the continuous glue bead applied to the substrate shearing the cord, and not guaranteeing not in the end a perfect seal of the glazing. To arrange in a small volume a glue delivery system, there is known a gun that delivers glue, not by mechanical control with volume transfer, but by pneumatic control.
Un tel pistolet comporte une chambre qui est alimentée en colle sous pression et qui présente une buse de sortie pour la colle. Un pointeau longitudinal agencé dans la chambre est mobile en translation, et est destiné à obturer la buse lorsqu'il s'agit de stopper la délivrance de colle. La buse de sortie présente une entrée conique qui est destinée à coopérer par appui avec l'extrémité du pointeau de forme sphérique pour arrêter la colle.Such a gun has a chamber which is fed with pressure glue and which has an outlet nozzle for the glue. A longitudinal pin arranged in the chamber is movable in translation, and is intended to close the nozzle when it comes to stopping the delivery of glue. The outlet nozzle has a conical inlet which is intended to cooperate by pressing with the end of the spherical needle to stop the glue.
Le pointeau est déplacé par un vérin pneumatique de course réduite adaptée au débit nécessaire de délivrance de colle. Un ressort de sécurité est prévu en cas de dysfonctionnement du circuit de pilotage pneumatique pour fermer immédiatement la distribution de colle depuis la buse du pistolet.The needle is moved by a pneumatic cylinder of reduced stroke adapted to the necessary flow of glue delivery. A safety spring is provided in case of a malfunction of the pneumatic control circuit to immediately close the distribution of glue from the nozzle of the gun.
Le fonctionnement de ce pistolet est du type binaire, c'est-à-dire que le pistolet est soit ouvert, soit fermé. Aussi, une fermeture trop anticipée de la buse peut conduire à un manque de délivrance de colle, ce qui entraîne le dépôt sur l'intercalaire d'une quantité insuffisante de colle engendrant au final une mauvaise étanchéité du vitrage. A l'inverse, une fermeture qui n'est pas assez rapide conduit à une surépaisseur de colle déposée sur l'intercalaire ce qui génère une pollution et des défauts esthétiques pour le vitrage. Par conséquent, ce type de pistolet ne permet pas une progressivité dans la délivrance de la colle et une homogénéité du dépôt, progressivité et homogénéité qui s'avèrent pourtant nécessaire en raison de certains paramètres que sont notamment la vitesse de délivrance de l'intercalaire (vitesse de défilement pouvant aller de 15 m/min à 25 m/min), la viscosité assez importante de la colle (100 à 300 Pa/s), la nécessité d'un bas débit (de l'ordre de 2 à 5 g de colle par mètre linéaire, soit un débit de 30 à 125 g/min), et d'un temps de réponse très court (de l'ordre de 10 ms). La vitesse de l'intercalaire est en effet variable et adaptée au type de contour du vitrage (forme polygonale ou courbe) ; en particulier au niveau des angles du vitrage lorsque celui-ci en présente, le contournement des angles s'effectue de manière moins rapide que le suivi d'une ligne droite. De plus à l'arrêt de la délivrance de l'intercalaire, il convient de stopper immédiatement la délivrance de colle sans engendrer un sous ou sur-dosage, ce qui n'est pas réalisable avec un tel pistolet.The operation of this gun is of the binary type, that is to say that the gun is either open or closed. Also, too early closure of the nozzle can lead to a lack of glue delivery, resulting in the deposit on the spacer of an insufficient amount of glue ultimately resulting in poor sealing of the glazing. Conversely, a closure that is not fast enough leads to an excess thickness of adhesive deposited on the interlayer which generates pollution and aesthetic defects for the glazing. Therefore, this type of gun does not allow a progressivity in the delivery of the glue and homogeneity of the deposit, progressivity and homogeneity which are nevertheless necessary because of certain parameters which are in particular the speed of delivery of the interlayer ( speed of scrolling from 15 m / min to 25 m / min), the rather high viscosity of the adhesive (100 to 300 Pa / s), the need for a low flow (of the order of 2 to 5 g of glue per linear meter, ie a flow rate of 30 to 125 g / min), and a very short response time (of the order of 10 ms). The speed of the interlayer is indeed variable and adapted to the type of contour of the glazing (polygonal shape or curve); in particular at the angles of the glazing when it presents, the circumvention of the angles is less rapid than the follow-up of a straight line. In addition to stopping the delivery of the interlayer, it is necessary to immediately stop the delivery of glue without causing under or overdosing, which is not achievable with such a gun.
Enfin, une telle ouverture/fermeture binaire ne permet pas d'adapter le débit de la colle délivrée sur l'intercalaire en fonction de la viscosité de la colle.Finally, such a binary opening / closing does not make it possible to adapt the flow rate of the glue delivered on the interlayer as a function of the viscosity of the glue.
L'invention a donc pour but de fournir un dispositif de distribution de colle qui permet de contrôler la quantité de colle à déposer afin de maîtriser dans le procédé de collage d'un intercalaire sur un vitrage, l'homogénéité du cordon de colle selon la vitesse de délivrance du substrat sur lequel est déposé la colle, en phase stabilisée du substrat (vitesse constante), ou en phase d'accélération ou de décélération pour des points singuliers du produit, tel qu'un vitrage, contre lequel le substrat encollé est rapporté.The purpose of the invention is therefore to provide a glue dispensing device which makes it possible to control the quantity of glue to be deposited in order to control in the process of gluing an interlayer to a glazing unit, the homogeneity of the adhesive bead according to the delivery rate of the substrate on which the glue is deposited, in the stabilized phase of the substrate (constant speed), or in the acceleration or deceleration phase for singular points of the product, such as a glazing, against which the glued substrate is reported.
Selon l'invention le dispositif de distribution de colle pour le collage d'un intercalaire d'un vitrage isolant comporte une chambre qui présente une entrée d'alimentation en colle dans ladite chambre et une buse de sortie pour la distribution de colle hors de la chambre, un pointeau qui présente une tête et qui est mobile en translation dans la chambre et est apte à obturer la buse de sortie, la buse de sortie comprenant un orifice d'entrée situé du côté intérieur de la chambre et contre lequel est destinée à s'appuyer la tête du pointeau pour fermer la buse, caractérisé en ce que le dispositif comporte des moyens d'asservissement à commande électronique pour piloter et commander la position du pointeau.According to the invention the glue dispensing device for gluing an interlayer of an insulating glazing unit comprises a chamber which has an inlet supplying glue into said chamber and an outlet nozzle for dispensing glue out of the chamber, a needle which has a head and which is movable in translation in the chamber and is adapted to close the outlet nozzle, the outlet nozzle comprising an inlet located on the inner side of the chamber and against which is intended to press the head of the needle to close the nozzle, characterized in that the device comprises electronically controlled servocontrol means for controlling and controlling the position of the needle.
Ainsi, le pointeau n'est pas mobile séquentiellement, c'est-à-dire mobile de sorte que seules deux ou trois positions existent pour le figer en réponse à un ordre manuel, mais il est mobile en réponse à un ordre à commande électronique de manière à le positionner à l'endroit exactement souhaité pour délivrer le débit attendu.Thus, the needle is not movable sequentially, i.e. movable so that only two or three positions exist to freeze it in response to a manual order, but it is movable in response to an electronically controlled order so as to position it at exactly the desired location to deliver the expected flow.
Selon une caractéristique, le dispositif comporte des moyens d'entraînement en translation du pointeau, tel qu'un vérin à vis, qui sont externes à la chambre et sont associés à l'extrémité du pointeau opposée à la tête.According to one characteristic, the device comprises means for translational movement of the needle, such as a screw jack, which are external to the chamber and are associated with the end of the needle opposite the head.
Selon une autre caractéristique, le dispositif comporte un moteur qui est destiné à actionner les moyens d'entraînement en translation, tandis que les moyens d'asservissement à commande électronique comportent un variateur de vitesse qui pilote le moteur. Avantageusement, les moyens d'asservissement à commande électronique fonctionnent en boucle fermée et comportent des moyens électroniques de pilotage qui reçoivent en entrée la position du pointeau et commandent en sortie au variateur de vitesse, une vitesse de consigne ou un couple de consigne à atteindre par le moteur. Pour assurer une homogénéité de la colle délivrée, il est en effet nécessaire de contrôler le débit de distribution de colle, car la vitesse du substrat sur lequel on applique la colle, ici l'intercalaire, peut varier ou bien le grammage de la colle (poids de colle déposée par mètre linéaire) peut également varier.According to another characteristic, the device comprises a motor which is intended to actuate the drive means in translation, while the electronically controlled servocontrol means comprise a speed variator which controls the motor. Advantageously, the electronically controlled servocontrol means operate in a closed loop and comprise electronic control means which receive as input the position of the needle and control at the output of the speed controller, a setpoint speed or a target torque to be reached by engine. To ensure homogeneity of the glue delivered, it is indeed necessary to control the glue dispensing rate, because the speed of the substrate to which the glue is applied, here the interlayer, can vary or the grammage of the glue ( weight of glue deposited per linear meter) can also vary.
C'est pourquoi, les moyens d'asservissement à commande électronique fonctionnent en boucle fermée, la position du pointeau étant adaptée en temps réel en fonction du débit souhaité de colle. A la position du pointeau, correspond une vitesse ou un couple de consigne du moteur.This is why the electronically controlled servocontrol means operate in a closed loop, the position of the needle being adapted in real time as a function of the desired flow rate of glue. At the position of the needle corresponds a motor speed or torque.
Par ailleurs, il est également nécessaire de veiller au débit d'alimentation en colle dans la chambre qui influe sur le débit final de délivrance de colle hors de la chambre. Aussi, la vitesse ou le couple de consigne du moteur est signifié pour une valeur donnée du débit d'alimentation en colle dans la chambre qui dépend de la pression de l'alimentation en colle dans la chambre et des caractéristiques rhéologiques de la colle, liées en particulier à sa température.Furthermore, it is also necessary to ensure the glue supply rate in the chamber that affects the final flow of glue delivery out of the room. Also, the speed or torque of the motor setpoint is meant for a given value of the glue feed rate in the chamber which depends on the pressure of the glue supply in the chamber and the rheological characteristics of the glue, related especially at its temperature.
Afin de s'assurer que la valeur de consigne (de la vitesse ou du couple) est celle qui correspond à une valeur de pression donnée du système d'alimentation en colle pour la chambre, et à une température donnée de la colle, le dispositif de l'invention comporte avantageusement un capteur de pression qui est situé en amont de l'entrée d'alimentation en colle de la chambre, et un capteur de température qui est disposé à proximité de l'entrée d'alimentation de la chambre. Les informations issues du capteur de pression ou du capteur de température sont transmises aux moyens d'asservissement à commande électronique.In order to ensure that the set point (speed or torque) is that which corresponds to a given pressure value of the glue supply system for the chamber, and at a given glue temperature, the device of the invention advantageously comprises a pressure sensor which is located upstream of the glue supply inlet of the chamber, and a sensor of temperature which is arranged near the supply inlet of the chamber. The information from the pressure sensor or the temperature sensor is transmitted to the electronically controlled servocontrol means.
Selon une autre caractéristique, les moyens d'asservissement à commande électronique comportent un codeur absolu qui est apte à signifier aux moyens électroniques de pilotage la position du pointeau dans la chambre. Un codeur absolu a l'avantage de ne pas nécessiter de prise de référence lors de la remise sous tension du dispositif, ce qui permet une utilisation sécurisée et garantit systématiquement la bonne position de fermeture lorsqu'il s'agit d'arrêter la distribution de colle.According to another characteristic, the electronically controlled servocontrol means comprise an absolute encoder which is capable of indicating to the electronic control means the position of the needle in the chamber. An absolute encoder has the advantage of not requiring reference points when powering up the device, which allows secure use and systematically ensures the correct closed position when it comes to stop the distribution of the device. glue.
En cas de dysfonctionnement, le dispositif comporte avantageusement un système de sécurité de fermeture immédiate de la buse.In the event of a malfunction, the device advantageously comprises a safety system for immediate closure of the nozzle.
Selon une caractéristique, l'orifice d'entrée de la buse et la tête du pointeau apte à coopérer avec l'orifice d'entrée, ont chacun une forme adaptée pour obtenir une linéarité du débit de colle hors de la chambre.According to one characteristic, the inlet orifice of the nozzle and the head of the needle adapted to cooperate with the inlet orifice, each have a shape adapted to obtain a linearity of the flow of glue out of the chamber.
De plus, l'orifice d'entrée de la buse et la tête du pointeau apte à coopérer avec l'orifice d'entrée ont des formes de coopération mutuelle.In addition, the inlet orifice of the nozzle and the head of the needle adapted to cooperate with the inlet orifice have forms of mutual cooperation.
L'orifice d'entrée de la buse présente de préférence une forme conique, tandis que la tête du pointeau destinée à coopérer avec l'orifice d'entrée de la buse est à surface de révolution et présente une section dont la pointe est triangulaire.The inlet orifice of the nozzle preferably has a conical shape, while the head of the needle intended to cooperate with the inlet orifice of the nozzle has a surface of revolution and has a section whose tip is triangular.
Selon une autre caractéristique, la pointe de la tête du pointeau est à bout arrondi.According to another characteristic, the tip of the needle head has a rounded tip.
Le dispositif de l'invention présente toute son utilité pour délivrer un cordon de colle homogène à de faibles débits, en particulier entre 30 et 125 g/min, ou selon un grammage compris entre 2 et 5 g/ml.The device of the invention has all its usefulness for delivering a homogeneous adhesive bead at low flow rates, in particular between 30 and 125 g / min, or at a basis weight of between 2 and 5 g / ml.
Il est utilisé pour déposer une épaisseur mince de colle de l'ordre de 0,3 mm et adapte le débit de colle délivrée en fonction de la rhéologie de la colle. Il est ainsi configuré pour délivrer la colle au plus proche de la zone recevant la colle.It is used to deposit a thin adhesive thickness of about 0.3 mm and adapts the flow of glue delivered according to the rheology of the glue. It is thus configured to deliver the glue closer to the area receiving the glue.
Utilisé pour déposer de la colle sur un substrat, il est particulièrement adapté à gérer des phases d'accélération et de décélération du substrat lorsque ce dernier est en mouvement tout en garantissant une continuité volumique du cordon de colle déposé.Used to deposit glue on a substrate, it is particularly suitable for managing acceleration and deceleration phases of the substrate when the latter is in motion while ensuring a volume continuity of the adhesive bead deposited.
Aussi ce dispositif est-il avantageusement utilisé pour le collage d'un intercalaire d'un vitrage isolant, en particulier pour le collage d'un intercalaire plat contre les tranches des feuilles de verre d'un vitrage isolant.Also this device is it advantageously used for gluing a spacer of an insulating glazing, in particular for gluing a flat interlayer against the slices of the glass sheets of an insulating glass.
L'invention a également trait à un procédé de dépôt de colle sur un substrat au moyen d'un dispositif tel que revendiqué ci-dessus.The invention also relates to a method of depositing glue on a substrate by means of a device as claimed above.
L'invention se rapporte également à un vitrage isolant comportant au moins deux feuilles de verre et un intercalaire assurant la séparation des feuilles de verre, l'intercalaire étant collé aux feuilles de verre en présentant de la colle qui est déposée sur ledit intercalaire selon le procédé de l'invention.The invention also relates to an insulating glazing unit comprising at least two sheets of glass and an interlayer ensuring the separation of the glass sheets, the interlayer being bonded to the glass sheets by presenting glue which is deposited on said interlayer according to the method of the invention.
L'invention permet de fournir un dépôt de colle qui se présente sous la forme d'au moins un cordon continu, homogène, ne présentant aucun cisaillement et présentant un grammage de 2 à 5 g/ml selon une épaisseur n'excédant pas 0,5 mm.The invention makes it possible to provide an adhesive deposit which is in the form of at least one continuous, homogeneous bead presenting no shear and having a grammage of 2 to 5 g / ml in a thickness not exceeding 0, 5 mm.
L'invention réalise ainsi un vitrage isolant comportant au moins deux feuilles de verre et un intercalaire assurant la séparation des feuilles de verre, l'intercalaire étant rendu solidaire de l'extérieur du vitrage en étant collé sur les tranches des feuilles de verre, un cordon de colle étant en regard de chaque tranche de feuille de verre.The invention thus provides an insulating glazing unit comprising at least two sheets of glass and an interlayer ensuring the separation of the glass sheets, the interlayer being secured to the outside of the glazing being adhered to the slices of the glass sheets, a glue bead being next to each slice of glass sheet.
D'autres détails et avantages de l'invention vont à présent être décrit, en regard des dessins annexés sur lesquels : - la figure 1 est une vue schématique en coupe du dispositif de distribution de colle selon l'invention ; - les figures 2a et 2b illustrent un exemple de réalisation de la forme de la tête du pointeau associée à une forme particulière de l'orifice d'entrée de la buse de délivrance de colle, respectivement en positions ouverte et fermée de la buse ; les figures 3a et 3b montrent une variante de réalisation des figures 2a et 2b. La figure 1 illustre un dispositif 1 de distribution de colle, l'arrivée de la colle dans le dispositif étant représentée par la référence 2.Other details and advantages of the invention will now be described, with reference to the accompanying drawings in which: - Figure 1 is a schematic sectional view of the adhesive dispensing device according to the invention; FIGS. 2a and 2b illustrate an exemplary embodiment of the shape of the head of the needle associated with a particular form of the inlet orifice of the glue dispensing nozzle, respectively in the open and closed positions of the nozzle; Figures 3a and 3b show an alternative embodiment of Figures 2a and 2b. FIG. 1 illustrates a glue dispensing device 1, the arrival of the glue in the device being represented by the reference 2.
L'utilisation de ce dispositif est avantageusement applicable à la distribution de colle sur un substrat nécessitant un débit régulé de matière, en particulier un grammage de l'ordre de 2 à 5 g de matière par mètre linéaire (ml) ou un débit de 30 à 125 g/min et pour une matière assez visqueuse (100 à 300 Pa/s), le substrat pouvant ou non être en défilement.The use of this device is advantageously applicable to the distribution of glue on a substrate requiring a controlled flow rate of material, in particular a weight of the order of 2 to 5 g of material per linear meter (ml) or a flow rate of 30 to 125 g / min and for a fairly viscous material (100 to 300 Pa / s), the substrate may or may not be in scrolling.
Le dispositif comporte une chambre 10 logeant la colle 2 et un pointeau 20 mobile en translation dans la chambre 10.The device comprises a chamber 10 housing the glue 2 and a needle 20 movable in translation in the chamber 10.
La chambre 10 comprend une entrée 11 d'alimentation en colle, au moins une buse de sortie 12 pour délivrer un cordon de colle. La buse de sortie présente une orifice d'entrée 13 du côté intérieur de la chambre qui est de forme sensiblement conique. L'entrée d'alimentation 11 est reliée à l'extérieur de la chambre à un tuyau flexible 11a connecté en amont 11 b à un système sous pression d'alimentation en colle non illustré. Le tuyau est gainé en comprenant une résistance chauffante interne de manière à garder ledit tuyau à la température idoine en rapport avec la viscosité de la colle. Le pointeau 20 comporte un corps oblong 21 et une tête 22. La tête 22 est interne à la chambre et est en regard de l'orifice d'entrée 13. L'extrémité 23 du corps, à l'opposé de la tête 22, est externe à la chambre.The chamber 10 comprises an inlet 11 for supplying glue, at least one outlet nozzle 12 for delivering a bead of glue. The outlet nozzle has an inlet port 13 on the inner side of the chamber which is substantially conical in shape. The feed inlet 11 is connected to the outside of the chamber to a hose 11a connected upstream 11b to a glue supply pressure system not shown. The pipe is sheathed by including an internal heating resistor so as to keep said pipe at the proper temperature in relation to the viscosity of the adhesive. The needle 20 comprises an oblong body 21 and a head 22. The head 22 is internal to the chamber and is opposite the inlet orifice 13. The end 23 of the body, opposite the head 22, is external to the room.
L'extrémité externe 23 est couplée à des moyens d'asservissement à commande électronique 3 qui assurent la translation du pointeau dans la chambre 10 via des moyens d'entraînement 4 et un moteur 5.The external end 23 is coupled to electronically controlled servocontrol means 3 which ensure the translation of the needle in the chamber 10 via drive means 4 and a motor 5.
La tête 22 du pointeau présente une surface de révolution, et son extrémité 22a est en pointe.The head 22 of the needle has a surface of revolution, and its end 22a is pointed.
La translation du pointeau 20 en direction de la buse de sortie 12 engendre l'engagement de la tête 22 dans l'orifice d'entrée 13 de la buse, qu'on nommera par la suite le siège du pointeau. Cette translation provoque en fonction de la position du pointeau, une variation du volume de colle utile dans la buse, et donc une variation du débit de colle distribuée.The translation of the needle 20 in the direction of the outlet nozzle 12 engenders the engagement of the head 22 in the inlet orifice 13 of the nozzle, which will be named later the seat of the needle. This translation causes depending on the position of the needle, a variation of the volume of glue useful in the nozzle, and therefore a variation in the flow of glue dispensed.
La position adéquate du pointeau par rapport à l'orifice d'entrée permet de contrôler le débit exactement voulu de colle distribuée. La forme de la tête 22 est adaptée pour coopérer mutuellement avec la forme de l'orifice d'entrée 13, la tête 22 constituant un élément mâle et épousant parfaitement la forme de l'orifice 13 constituant l'élément femelle, de manière à assurer une fermeture étanche de la buse lorsque ladite tête est totalement en appui contre la surface du siège. La forme de l'orifice d'entrée 13 ainsi que la forme de la tête 22 du pointeau participent également au contrôle du débit de colle. Leur forme assure en effet de fournir un débit de colle qui suit une courbe linéaire de travail en fonction de la position de pointeau, ce qui conduit à un dépôt homogène de colle sur le substrat de réception.The proper position of the needle with respect to the inlet port controls the exact flow rate of dispensed glue. The shape of the head 22 is adapted to mutually cooperate with the shape of the inlet orifice 13, the head 22 constituting a male element and perfectly matching the shape of the orifice 13 constituting the female element, so as to ensure sealing the nozzle when said head is fully supported against the seat surface. The shape of the inlet orifice 13 as well as the shape of the head 22 of the needle also participate in the control of the flow of glue. Their shape ensures a glue flow that follows a linear working curve as a function of the needle position, which leads to a uniform deposition of glue on the receiving substrate.
Les figures 2a, 2b illustrent un exemple de réalisation quant à la forme de la tête du pointeau associée à une forme particulière de l'orifice d'entrée de la buse, respectivement en positions ouverte et fermée de la buse. Les figures 3a et 3b correspondent à une variante de réalisation. De préférence, on donne à la tête 22 une section 22b de forme polygonale dont les segments de droite coopèrent mutuellement avec les lignes du siège 13 de manière à obturer la buse lorsque le pointeau y est totalement enfoncé.FIGS. 2a and 2b illustrate an exemplary embodiment as to the shape of the head of the needle associated with a particular form of the inlet orifice of the nozzle, respectively in the open and closed positions of the nozzle. Figures 3a and 3b correspond to an alternative embodiment. Preferably, the head 22 is given a section 22b of polygonal shape, the right segments cooperate mutually with the lines of the seat 13 so as to close the nozzle when the needle is fully depressed.
Avantageusement, l'extrémité 22a de la tête présente une section triangulaire, et peut être à bout arrondi (figure 2a ou 3a). Le pointeau 20 doit être mû en temps réel par rapport au débit nécessaire de colle à un instant donné, ce qui est réalisable par un asservissement à commande électronique du pointeau par les moyens 3. En fonction de différents paramètres dépendant de la viscosité de la colle, du mouvement ou non du substrat sur lequel est appliquée la colle, de la vitesse du substrat lorsque celui-ci est en mouvement, une valeur de consigne du débit de colle est définie. Cette valeur de consigne est établie au niveau de moyens électroniques de pilotage 30 qui commandent le mouvement du pointeau de manière à le positionner à l'endroit exact correspondant au débit de colle souhaité.Advantageously, the end 22a of the head has a triangular section, and may be rounded tip (Figure 2a or 3a). The needle 20 must be moved in real time with respect to the required flow rate of glue at a given instant, which is achievable by an electronically controlled servocontrol of the needle by the means 3. Depending on different parameters depending on the viscosity of the glue , the movement or not of the substrate on which the glue is applied, the speed of the substrate when it is in motion, a set value of the glue flow rate is defined. This setpoint is set at electronic control means 30 which control the movement of the needle so as to position it at the exact location corresponding to the desired glue flow rate.
Il est nécessaire de prévoir des moyens adaptés pour parvenir à une translation immédiate et régulée du pointeau 20. Aussi, l'extrémité externe 23 du pointeau est couplée à des moyens d'entraînement en translation 4, tel qu'un vérin à vis, ces moyens d'entraînement étant pilotés par un moteur 5 qui est asservi aux moyens électroniques 30 via un variateur de vitesse 31.It is necessary to provide suitable means to achieve an immediate and controlled translation of the needle 20. Also, the outer end 23 of the needle is coupled to translation drive means 4, such as a screw jack, these driving means being driven by a motor 5 which is slaved to the electronic means 30 via a variable speed drive 31.
Le variateur de vitesse 31 gère en boucle fermée la vitesse ou le couple du moteur 5 de manière à contrôler la position du pointeau dans la chambre et par conséquent le débit de colle délivrée.The variable speed drive 31 manages in a closed loop the speed or the torque of the motor 5 so as to control the position of the needle in the chamber and consequently the flow rate of glue delivered.
La position du pointeau est relevée à l'aide d'un codeur 32 dit absolu, c'est- à-dire un codeur pour lequel une position de référence 0 est initialement identifiée et enregistrée dans les moyens électroniques de pilotage 30. La position du pointeau est fournie à un contrôleur d'axe numérique incorporé dans les moyens de pilotage 30 qui, en fonction de la position génère et indique au variateur de vitesse 31 une vitesse de consigne ou un couple de consigne pour assurer la position voulue du pointeau.The position of the needle is read using an absolute encoder 32, that is to say an encoder for which a reference position 0 is initially identified. and recorded in the electronic control means 30. The position of the needle is supplied to a digital axis controller incorporated in the control means 30 which, depending on the position, generates and indicates to the variable speed drive 31 a set speed or a set torque to ensure the desired position of the needle.
On parle dans la suite de la description du « mode vitesse » lorsque le variateur de vitesse agit sur la vitesse du moteur. On utilise ce mode lorsque le pointeau est à une position fixe dans la chambre afin de délivrer un débit constant, le moteur tournant à une vitesse constante. On utilise encore ce mode vitesse au démarrage du dispositif de distribution de colle ou en vue de l'arrêt du dispositif lorsque l'on passe respectivement dans des phases transitoires d'accélération ou de décélération de dépose de colle sur le substrat, la variation de vitesse du moteur entraînant la modification de la position du pointeau dans la chambre et par conséquent modifiant le débit de colle délivrée.In the following description of the "speed mode" is discussed when the drive controller acts on the speed of the motor. This mode is used when the needle is at a fixed position in the chamber to deliver a constant flow with the motor running at a constant speed. This speed mode is also used at the start of the glue dispensing device or in order to stop the device when passing respectively in transient acceleration or deceleration phases of glue removal on the substrate, the variation of motor speed causing the change of the position of the needle in the chamber and therefore altering the flow rate of glue delivered.
On parle du « mode couple » lorsque le variateur de vitesse agit sur le couple du moteur. Ce mode est utilisé pour assurer un accostage précis et robuste de la tête 22 du pointeau contre son siège 13 de manière à fermer l'orifice de sortie en garantissant la fonction d'étanchéité, quel que soit l'environnement du pointeau. En effet, l'usure des pièces (l'extrémité du pointeau, le siège) ou l'éventualité d'un encrassement de la surface des pièces par une surépaisseur de colle par exemple, peut engendrer une incertitude quant à l'ajustement de la position du pointeau en position d'appui contre son siège en mode vitesse; alors qu'en contrôlant le couple du moteur, on contrôle parfaitement l'effort fourni par le moteur et l'on peut garantir ainsi l'appui ferme et étanche du pointeau contre son siège. Bien entendu, la valeur de consigne du couple qui garantit la fermeture du dispositif est obtenue par apprentissage mais est ensuite fixée définitivement.We speak of the "torque mode" when the variable speed drive acts on the motor torque. This mode is used to ensure a precise and robust docking of the needle head 22 against its seat 13 so as to close the outlet orifice ensuring the sealing function, regardless of the needle environment. Indeed, the wear of the parts (the end of the needle, the seat) or the possibility of fouling of the surface of the parts by an excess thickness of glue for example, can cause an uncertainty as for the adjustment of the position of the needle in the support position against its seat in speed mode; while controlling the engine torque, we perfectly control the force provided by the engine and we can thus guarantee the firm and waterproof support of the needle against his seat. Of course, the setpoint value of the torque which guarantees the closure of the device is obtained by learning but is then fixed permanently.
Ainsi, pour la fermeture du dispositif, on déplace le pointeau via le mode vitesse jusqu'à proximité immédiate du siège, position pour laquelle le variateur de vitesse bascule en mode couple.Thus, for closing the device, the needle is moved via the speed mode to the immediate vicinity of the seat, a position for which the variable speed drive switches to torque mode.
Enfin, le mode couple est privilégié lorsque le débit doit être modulé de manière précise sur des courtes distances, par exemple au niveau des angles du substrat à contourner. La régulation de la rotation du moteur via le couple est préférée pour assurer une régulation plus précise de la position du pointeau et par conséquent du débit de colle.Finally, the torque mode is preferred when the flow must be modulated accurately over short distances, for example at the corners of the substrate to be bypassed. The regulation of the rotation of the motor via the torque is preferred to ensure a more precise regulation of the position of the needle and therefore the flow of glue.
Le débit est certes réglé par la position du pointeau comme expliqué ci- dessus mais il est par ailleurs fortement dépendant de la pression fournie en amont 11 b du tuyau flexible 11 pour alimenter la colle jusque dans la chambre. Cette pression qui correspond alors à un débit de colle en entrée de la chambre 11 est liée à la rhéologie de la colle. Or un changement de température de la colle de l'ordre du degré modifie sa viscosité, et si la pression pour l'alimentation de la colle reste inchangée, le débit en sortie de la buse 12 est alors modifié. Aussi est-il nécessaire de contrôler la température de la colle dans la chambre pour fournir une pression en alimentation de colle adaptée au débit souhaité en sortie de buse, corrélativement à la position du pointeau.The flow rate is adjusted by the position of the needle as explained above but it is also strongly dependent on the pressure supplied upstream 11b of the flexible pipe 11 to feed the glue into the chamber. This pressure, which then corresponds to a glue flow rate entering the chamber 11, is related to the rheology of the glue. However, a temperature change of the glue of the order of the degree modifies its viscosity, and if the pressure for feeding the glue remains unchanged, the flow rate at the outlet of the nozzle 12 is then modified. Therefore it is necessary to control the temperature of the glue in the chamber to provide a glue supply pressure adapted to the desired flow nozzle outlet, correlatively to the position of the needle.
L'ensemble des organes, en particulier le tuyau flexible, la chambre, le siège du pointeau, l'orifice de sortie de la buse, qui se trouvent au contact de la colle sont déjà maintenus à une température de conditionnement de la colle dans une plage de 100 à 1400C, au moyen de résistances électriques insérées dans lesdits organes qui sont faits dans un matériau conducteur de la chaleur. Pour le contrôle de la température, un capteur de température 6 est disposé au niveau de l'entrée 11 d'alimentation en colle dans la chambre 10. Un capteur de pression 7 est également prévu en amont 11 b du tuyau flexible 11a de manière à fournir une image de la viscosité de la colle.All the members, in particular the flexible pipe, the chamber, the seat of the needle, the outlet orifice of the nozzle, which are in contact with the glue, are already maintained at a glue conditioning temperature in a range from 100 to 140 0 C, by means of electrical resistors inserted in said members which are made of a heat conducting material. For the temperature control, a temperature sensor 6 is disposed at the glue feed inlet 11 in the chamber 10. A pressure sensor 7 is also provided upstream 11b of the hose 11a so as to provide an image of the viscosity of the glue.
Ces paramètres, températures et pression, sont acquis en temps réel et permettent par apprentissage et modélisation de définir des tables de débits de colle en sortie de la buse, débits associés au positionnement du pointeau et à la température et la pression, afin d'établir précisément le profil de déplacement du pointeau pour maîtriser le débit dans les phases transitoires d'accélération et de décélération de dépose de la colle.These parameters, temperatures and pressure, are acquired in real time and allow learning and modeling to define glue flow tables at the outlet of the nozzle, flows associated with the positioning of the needle and the temperature and pressure, to establish precisely the displacement profile of the needle to control the flow in the transient phases of acceleration and deceleration of removal of the glue.
Ainsi, une variation de température correspondra à une nouvelle température de la colle, pour laquelle à une pression donnée de la colle, et à une position donnée du pointeau, une valeur de débit en sortie de buse est prévisible. Pour adapter à la valeur souhaitée la valeur du débit qui aura changé en raison du changement de la température de la colle, on modifiera la position du pointeau sans changer la pression de l'alimentation en colle. Enfin, un système de sécurité 8 de fermeture immédiate de la buse 12 est prévu indépendamment du pointeau 20 afin de pouvoir stopper immédiatement la distribution de colle en cas de dysfonctionnement du pilotage du pointeau. Ce système de sécurité est tel que déjà connu, constitué d'un clapet de fermeture qui est actionné par un ressort piloté par un vérin en réponse à un ordre de déclenchement.Thus, a variation in temperature will correspond to a new temperature of the adhesive, for which at a given pressure of the adhesive, and at a given position of the needle, a value of flow at the nozzle outlet is predictable. To adjust to the desired value the value of the flow that has changed due to the change in the temperature of the glue, it will change the position of the needle without changing the pressure of the glue supply. Finally, a safety system 8 for immediate closure of the nozzle 12 is provided independently of the needle 20 in order to immediately stop the distribution of glue in the event of malfunction of the control of the needle. This security system is as already known, consisting of a closure valve which is actuated by a spring controlled by a jack in response to a trip command.
Le dispositif décrit ci-dessus est particulièrement adapté à des débits de faibles volumes (grammage de 2 à 5 g de matière par mètre linéaire), pour des sections d'application de petite taille (de l'ordre de 2 mm de largeur et de l'ordre de 0,3 mm d'épaisseur).The device described above is particularly suitable for low volume flow rates (grammage of 2 to 5 g of material per linear meter), for small application sections (of the order of 2 mm in width and the order of 0.3 mm thick).
Un exemple de réalisation sans y être toutefois limité, consiste à déposer de la colle sur un substrat plat du type ruban d'aluminium qui est destiné à constituer l'intercalaire d'un vitrage isolant, l'intercalaire devant être collé sur les tranches des feuilles de verre du vitrage. Le dépôt de colle se fait notamment sur l'intercalaire en mouvement, la vitesse de défilement dudit intercalaire étant de 15 m/min à 25 m/min. Le dispositif de l'invention permet donc dans un environnement extrêmement compact et le plus proche du point d'utilisation et d'application de la colle d'apporter une fonction de dosage en temps réel en particulier pour les phases transitoires d'accélération et de décélération de l'intercalaire en mouvement et donc du dépôt de colle. An exemplary embodiment without being limited thereto, consists in depositing glue on a flat substrate of the aluminum strip type which is intended to form the interlayer of an insulating glazing unit, the interlayer to be glued on the slices of glass sheets of the glazing. The glue is deposited in particular on the moving interlayer, the speed of travel of said interlayer being 15 m / min at 25 m / min. The device of the invention thus makes it possible, in an extremely compact environment and the closest to the point of use and application of the glue, to provide a real-time dosing function, in particular for the transient phases of acceleration and deceleration of the interlayer in motion and therefore the deposition of glue.

Claims

REVENDICATIONS
1. Dispositif de distribution de colle (1 ) pour le collage d'un intercalaire d'un vitrage isolant, le dispositif comportant une chambre (10) qui présente une entrée (11 ) d'alimentation en colle dans la chambre et une buse de sortie (12) pour la distribution de colle hors de la chambre, un pointeau (20) qui présente une tête (22) et qui est mobile en translation dans la chambre (10) et est apte à obturer la buse de sortie (12), la buse de sortie comprenant un orifice d'entrée (13) situé du côté intérieur à la chambre et contre lequel est destinée à s'appuyer la tête (22) du pointeau pour fermer la buse, caractérisé en ce que le dispositif comporte des moyens d'asservissement à commande électronique (3) pour piloter et commander la position du pointeau (20).An adhesive dispensing device (1) for bonding a spacer of an insulating glazing unit, the device comprising a chamber (10) having an inlet (11) for supplying glue to the chamber and a nozzle of outlet (12) for dispensing glue out of the chamber, a needle (20) which has a head (22) and which is movable in translation in the chamber (10) and is able to close the outlet nozzle (12) , the outlet nozzle comprising an inlet orifice (13) located on the inside of the chamber and against which the head (22) of the needle is intended to rest to close the nozzle, characterized in that the device comprises electronically controlled servocontrol means (3) for controlling and controlling the position of the needle (20).
2. Dispositif selon la revendication 1 , caractérisé en ce qu'il comporte des moyens d'entraînement en translation (4) du pointeau, tels qu'un vérin à vis, qui sont externes à la chambre (10) et sont associés à l'extrémité (23) du pointeau opposée à la tête (22).2. Device according to claim 1, characterized in that it comprises translational drive means (4) of the needle, such as a screw jack, which are external to the chamber (10) and are associated with the end (23) of the needle opposite the head (22).
3. Dispositif selon la revendication 2, caractérisé en ce qu'il comporte un moteur (5) qui est destiné à actionner les moyens d'entraînement (4), et en ce que les moyens d'asservissement à commande électronique (3) comportent un variateur de vitesse (31 ) qui pilote le moteur (5).3. Device according to claim 2, characterized in that it comprises a motor (5) which is intended to actuate the drive means (4), and in that the electronically controlled servocontrol means (3) comprise a variable speed drive (31) which controls the motor (5).
4. Dispositif selon la revendication 3, caractérisé en ce que les moyens d'asservissement à commande électronique (3) fonctionnent en boucle fermée et comportent des moyens électroniques de pilotage (30) qui reçoivent en entrée la position du pointeau (20) dans la chambre et commandent en sortie au variateur de vitesse (31 ), une vitesse de consigne ou un couple de consigne à atteindre par le moteur (5).4. Device according to claim 3, characterized in that the electronically controlled servocontrol means (3) operate in a closed loop and comprise electronic control means (30) which receive as input the position of the needle (20) in the chamber and control output to the variable speed drive (31), a set speed or a set torque to be reached by the motor (5).
5. Dispositif selon l'une quelconque des revendications, caractérisé en ce qu'il comporte un capteur de pression (7) en amont (11 b) de l'entrée d'alimentation (11 ) en colle de la chambre. 5. Device according to any one of the claims, characterized in that it comprises a pressure sensor (7) upstream (11b) of the supply inlet (11) glue the chamber.
6. Dispositif selon l'une quelconque des revendications, caractérisé en ce qu'il comporte un capteur de température (6) disposé à proximité de l'entrée (11 ) d'alimentation en colle dans la chambre (10). 6. Device according to any one of claims, characterized in that it comprises a temperature sensor (6) disposed near the inlet (11) for supplying glue into the chamber (10).
7. Dispositif selon la revendication 5 ou 6, caractérisé en ce que les informations issues du capteur de pression (7) ou du capteur de température (6) sont transmises aux moyens d'asservissement à commande électronique (3).7. Device according to claim 5 or 6, characterized in that the information from the pressure sensor (7) or the temperature sensor (6) is transmitted to the electronically controlled servo means (3).
8. Dispositif selon l'une quelconque des revendications, caractérisé en ce que les moyens d'asservissement à commande électronique (3) comporte un codeur absolu (32) qui est apte à signifier la position du pointeau dans la chambre.8. Device according to any one of claims, characterized in that the electronically controlled servocontrol means (3) comprises an absolute encoder (32) which is capable of indicating the position of the needle in the chamber.
9. Dispositif selon l'une quelconque des revendications, caractérisé en ce qu'il comporte un système de sécurité (8) de fermeture immédiate de la buse (12). 9. Device according to any one of claims, characterized in that it comprises a safety system (8) immediate closure of the nozzle (12).
10. Dispositif selon l'une quelconque des revendications, caractérisé en ce que l'orifice d'entrée (13) de la buse et la tête (22) du pointeau apte à coopérer avec l'orifice d'entrée, ont chacun une forme adaptée pour obtenir une linéarité du débit de colle hors de la chambre (10).10. Device according to any one of claims, characterized in that the inlet orifice (13) of the nozzle and the head (22) of the needle adapted to cooperate with the inlet orifice, each have a shape adapted to obtain a linearity of the flow of glue out of the chamber (10).
11. Dispositif selon l'une quelconque des revendications, caractérisé en ce que l'orifice d'entrée (13) de la buse et la tête (22) du pointeau apte à coopérer avec l'orifice d'entrée ont des formes de coopération mutuelle.11. Device according to any one of claims, characterized in that the inlet orifice (13) of the nozzle and the head (22) of the needle adapted to cooperate with the inlet port have forms of cooperation. mutual.
12. Dispositif selon la revendication 10, caractérisé en ce que l'orifice d'entrée (13) présente une forme conique.12. Device according to claim 10, characterized in that the inlet port (13) has a conical shape.
13. Dispositif selon la revendication 10, caractérisé en ce que la tête (22) du pointeau est à surface de révolution et présente une section (22b) dont la pointe est triangulaire.13. Device according to claim 10, characterized in that the head (22) of the needle is surface of revolution and has a section (22b) whose tip is triangular.
14. Dispositif selon la revendication 12, caractérisé en ce que la pointe de la tête (22) est à bout (22a) arrondi.14. Device according to claim 12, characterized in that the tip of the head (22) is rounded (22a).
15. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il délivre un débit de colle entre 30 et 125 g/min ou un grammage de 2 à 5 g/ml.15. Device according to any one of the preceding claims, characterized in that it delivers a glue flow rate between 30 and 125 g / min or a basis weight of 2 to 5 g / ml.
16. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est utilisé pour déposer une épaisseur de colle de l'ordre de 0,3 mm et adapte le débit de colle délivrée en fonction de la rhéologie de la colle.16. Device according to any one of the preceding claims, characterized in that it is used to deposit a glue thickness of the order of 0.3 mm and adapts the glue flow delivered according to the rheology of the glue. .
17. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est utilisé pour déposer de la colle sur un substrat et est adapté à gérer des phases d'accélération et de décélération du substrat lorsque ce dernier est en mouvement.17. Device according to any one of the preceding claims, characterized in that it is used to deposit glue on a substrate and is adapted to manage acceleration and deceleration phases of the substrate when the latter is in motion.
18. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est utilisé pour le collage d'un intercalaire plat contre les tranches des feuilles de verre d'un vitrage isolant.18. Device according to any one of the preceding claims, characterized in that it is used for gluing a flat interlayer against the edges of the glass sheets of an insulating glazing unit.
19. Procédé de dépôt de colle sur un substrat au moyen d'un dispositif selon l'une quelconque des revendications précédentes.19. A method of depositing glue on a substrate by means of a device according to any one of the preceding claims.
20. Intercalaire pourvu d'un dépôt de colle, caractérisé en ce que le dépôt se présente sous la forme d'au moins un cordon continu, homogène, ne présentant aucun cisaillement et présentant un grammage de 2 à 5 g/ml selon une épaisseur n'excédant pas 0,5 mm.20. Intercalary provided with a glue deposit, characterized in that the deposit is in the form of at least one continuous bead, homogeneous, having no shear and having a basis weight of 2 to 5 g / ml according to a thickness not exceeding 0,5 mm.
21. Vitrage isolant comportant au moins deux feuilles de verre et un intercalaire selon la revendication 20 assurant la séparation des feuilles de verre.21. Insulating glass comprising at least two sheets of glass and a spacer according to claim 20 ensuring the separation of the glass sheets.
22. Vitrage isolant selon la revendication 21 , caractérisé en ce que l'intercalaire est rendu solidaire de l'extérieur du vitrage en étant collé sur les tranches des feuilles de verre, un cordon de colle étant en regard de chaque tranche de feuille de verre .22. insulating glazing according to claim 21, characterized in that the insert is secured to the outside of the glazing being adhered to the edges of the glass sheets, a bead of adhesive being opposite each slice of glass sheet .
23. Vitrage isolant comportant au moins deux feuilles de verre et un intercalaire assurant la séparation des feuilles de verre, l'intercalaire étant collé aux feuilles de verre en présentant de la colle qui est déposée sur ledit intercalaire selon le procédé de la revendication 19. 23. Insulating glazing comprising at least two sheets of glass and an interlayer separating the glass sheets, the interlayer being adhered to the glass sheets by presenting glue which is deposited on said interlayer according to the method of claim 19.
PCT/FR2007/052498 2006-12-22 2007-12-13 Glue dispensing device, gluing method, insulation glazing and spacer thereof provided with glue WO2008078044A2 (en)

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FR0655880A FR2910464A1 (en) 2006-12-22 2006-12-22 GLUE DELIVERY DEVICE AND METHOD OF BONDING, AND INSULATING GLAZING AND ITS INTERIOR WITH GLUE

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CN114619242B (en) * 2022-03-23 2023-01-17 广州辰达精密光电科技有限公司 Lens pressing, dispensing and curing device and method

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FR2910464A1 (en) 2008-06-27

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