EP2447171A1 - Deep draw packaging machine and method for operating the same - Google Patents

Deep draw packaging machine and method for operating the same Download PDF

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Publication number
EP2447171A1
EP2447171A1 EP11008378A EP11008378A EP2447171A1 EP 2447171 A1 EP2447171 A1 EP 2447171A1 EP 11008378 A EP11008378 A EP 11008378A EP 11008378 A EP11008378 A EP 11008378A EP 2447171 A1 EP2447171 A1 EP 2447171A1
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EP
European Patent Office
Prior art keywords
cutting station
strip
slide
packaging machine
punching
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP11008378A
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German (de)
French (fr)
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EP2447171B1 (en
Inventor
Hans-Christian Schichte
Thomas Nassal
Elmar Ehrmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multivac Sepp Haggenmueller GmbH and Co KG
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Multivac Sepp Haggenmueller GmbH and Co KG
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Publication of EP2447171A1 publication Critical patent/EP2447171A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
    • B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting
    • B65B61/065—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting by punching out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material

Definitions

  • the invention relates to a thermoforming packaging machine according to the preamble of claim 1, and to a method for operating a thermoforming packaging machine for punching strip cuts.
  • thermoforming packaging machines In thermoforming packaging machines, a trough is usually formed into a lower film in a forming station, a product is inserted therein, and the trough is hermetically sealed in a sealing station with a top film under vacuum and / or modified atmosphere.
  • the packs produced in this way are bound together as a composite over the lower film and are transported through double-sided staple chains through the thermoforming packaging machine.
  • a combination of a cross-cutting station and a subsequent longitudinal cutting station can be provided for separating the packages from the composite of the lower and the upper film.
  • the composite of the lower and the upper film is cut transversely to the transport direction or, if radii are necessary at the edges of the packaging, strip cuts are punched out.
  • the knife coming from above can punch out the strip cuts and the strip cuts fall down. If the space for a device for collecting within the machine frame or for transporting out of the machine frame is not sufficiently available, the punching knife coming from below can punch out the strip cuts upwards. These are then pushed in a receptacle after each cut further up and can then be collected collected. In high-performance machines, the receptacles are very high, so they do not have to empty constantly.
  • the strip cuts are pushed over a shoulder, which is located above a film transport plane, and on which the last cut strip cut partially rests with its edge and thus prevents the stacked strip cuts down into the cross cutting station or on the packaging to be cut fall. In the latter case, there would be disruptions in the thermoforming packaging machine.
  • the object of the present invention is to provide a thermoforming packaging machine and a method for its operation, in which the disadvantages described above can be eliminated.
  • thermoforming packaging machine with the features of claim 1 or by a method having the features of claim 7.
  • Advantageous developments of the invention are specified in the subclaims.
  • thermoforming packaging machine is characterized in that it comprises at least one cross cutting station and a longitudinal cutting station, wherein the cross cutting station has a punching device for separating a strip cut from a lower film and / or a top film by means of a punching knife, wherein the punching device preferably substantially transversely to one Direction of transport is aligned and the punching device has a receptacle for receiving the strip cut above the lower film and / or the upper film.
  • the cross-cutting station has at least one slider to carry a portion of the strip cuts, which are located in the receptacle and over the slide.
  • the slider is arranged as close as possible above the transport plane of the lower film.
  • the slider is preferably in a plane which is substantially parallel to a transport plane of the lower film, movable in the receptacle to ensure a safe insertion of the slider between two strip sections.
  • the punching device has holding elements in order to carry a plurality of strip cuts, which are located above the transport plane of the lower film and below the slide.
  • Such holding elements make it possible to carry individual strip cuts and thus ensure further relief of the lowest and last cut strip section. Dropping of this last cut strip section and the overlying strip cuts is prevented.
  • the holding elements are designed as a sawtooth to provide a support for at least a portion of the strip cuts available, and on the other hand, the strip cuts easily on the heels of the holding elements over to push upwards.
  • the holding elements on several horizontal paragraphs at different heights, between which a slope is attached.
  • the slider preferably has a beveled leading edge, so that the immersion of the slider between two superimposed strip cuts is ensured.
  • the slide can be designed as a flat plate or in the form of a rake or a fork.
  • the slide by means of a pneumatic drive, such as a pneumatic cylinder, or an electric drive, such as a servo motor or an electromagnet, driven to ensure rapid movement and an exact position of the slider relative to the strip sections.
  • a pneumatic drive such as a pneumatic cylinder
  • an electric drive such as a servo motor or an electromagnet
  • a method for operating a thermoforming packaging machine provides at least one cross cutting station and one longitudinal cutting station, wherein the cross cutting station has a punching device for separating a strip cut from a lower film and / or a top film by means of a punching knife, and a slide before or during a punching operation of the strip cuts is moved away, another strip section is pushed upwards and then the slider is moved in between two adjacent and superimposed strip sections to carry the strip cuts located above the slider.
  • the cross cutting station has a punching device for separating a strip cut from a lower film and / or a top film by means of a punching knife, and a slide before or during a punching operation of the strip cuts is moved away, another strip section is pushed upwards and then the slider is moved in between two adjacent and superimposed strip sections to carry the strip cuts located above the slider.
  • the movement of the slider is carried out by means of a controller, since the controller has all the information about the machine processes and especially the sensors and actuators of the cross-cutting station and thus can ensure an efficient and reliable process.
  • the slider is moved out of the stack of strip sections in a receptacle before the punching knife begins the punching process or the punching knife comes into contact with the lower film or the transport of the lower film and upper film is terminated in the cross cutting station.
  • the pusher is preferably moved into the stack of strip cuts in the receptacle before the punching knife is moved downwardly after the punching operation to carry all the strip cuts over the pusher and to relieve the strip cuts underneath.
  • FIG. 1 shows a schematic view of a packaging machine according to the invention in the form of a thermoforming packaging machine 1.
  • the thermoforming packaging machine 1 has a forming station 2, a sealing station 3, a cross-cutting station 4 and a longitudinal cutting station 5, which are arranged in this order in a direction R on a machine frame 6.
  • a material reservoir 9 is provided, from which a top film 10 is drawn off.
  • a discharge device 13 in the form of a conveyor belt is provided on the packaging machine, with the finished, isolated packaging 21 are transported away.
  • the packaging machine 1 a feed device, not shown, which engages the lower film 8 and transported in a main working cycle in cycles in the direction of R.
  • the feed device can be realized, for example, by laterally arranged transport chains and transport the lower film 8 in a transport plane E.
  • the forming station 2 is formed as a thermoforming station in which containers 14 are formed in the lower film 8 by deep drawing.
  • the forming station 2 may be designed such that in the direction perpendicular to the working direction R a plurality of containers are formed side by side.
  • an insertion path 15 is provided, in which the containers 14 formed in the lower film 8 are filled with products 16.
  • the sealing station 3 has a closable chamber 17 in which the atmosphere in the container 14 can be replaced with a replacement gas or exchange gas mixture prior to sealing, for example, by gas purging.
  • the cross cutting station 4 is designed as a strip punch, which cuts through the lower film 8 and the upper film 10 in a direction transverse to the working direction R between adjacent containers 14.
  • the cross-cutting station 4 operates such that the lower film 8 is not separated over the entire width, but at least in an edge region and between two adjacent containers 14 is not severed. This allows a controlled onward transport of the container 14 by the feed device.
  • the longitudinal cutting station 5 is designed as a knife arrangement with which the lower film 8 and the upper film 10 are severed between adjacent containers 14 and at the lateral edge of the lower film 8 so that individual packages 21 are present behind the longitudinal cutting station 5.
  • the packaging machine 1 also has a controller 18. It has the task of controlling and monitoring the processes taking place in the packaging machine 1.
  • a display device 19 with operating elements 20 serves to visualize or influence the process sequences in the thermoforming packaging machine 1 for or by an operator.
  • the lower film 8 is withdrawn from the feed roller 7 and transported by the feed device into the forming station 2.
  • containers 14 are formed by deep drawing in the lower film 8.
  • the containers 14 are used together with the surrounding Area of the lower film 8 transported in a main working cycle to the insertion path 15 in which they are filled with product 16.
  • the filled containers 14 are transported along with the surrounding area of the lower film 8 in the main working cycle by the feed device in the sealing station 3.
  • the top film 10 is transported on to the lower film 8 with the advancing movement of the lower film 8 after a sealing operation.
  • the upper film 10 is withdrawn from the material storage 9.
  • sealed packages 21 are formed.
  • FIG. 2 shows a cross-cutting station 4 with a punching device 22 which moves by means of a pneumatic drive 23, a punching knife 24 up against the lower film 8 and upper film 10, not shown, while a strip cut 25 (see FIG. 4 ) separates out of the composite of the lower film 8 and upper film 10. In the further upward movement of the strip cut 25 is transported so far that it is supported by holding elements 26 against falling down.
  • FIG. 3 are two slides 29, which have the shape of a rake or a fork shown, which are movable in the receptacle 27 by means of pneumatic cylinders 30 in the direction of a stack of strip sections 25, not shown, and back again.
  • the stack with the strip cuts 25 is guided by guides 31 so that the position of the individual strip cuts 25 is maintained in the transverse and longitudinal direction.
  • the holding elements 26 have sawtooth-shaped shoulders 32, which hold an edge region of a strip portion 25 so that it does not fall back into the punching device 22, while the punching knife 24 is moved back down to a parking position.
  • a next strip cut 25 is pushed upward, thereby pushing the previous strip cut 25 further upwards around a shoulder 32 on the holding elements 26.
  • the horizontal shoulders 32 are arranged at different heights on the holding element 26.
  • the slides 29 are shown in two positions.
  • the slide 29 shown on the left-hand side in the plan view is in a position outside the stack with the strip cuts 25 and the slide 29 shown on the right is in the position in which it is moved between two strip cuts 25 of the stack and thus the strip cuts 25 located above bears against falling down.
  • the movement of the slide 29 is preferably synchronous.
  • the movement of the slider 29 in the stack with strip cuts 25 takes place as soon as the punching knife 24 has completed the punching operation in the uppermost position.
  • the punching blade 24 moves down.
  • the slides 29 are mounted in or on the receptacle 27 directly above the punching device 22 so that only a few strip cuts 25 between the transport plane E of the lower film 8 and the sliders 29 are.
  • the slides 29 preferably have a bevel in the front region 31. This chamfer can also be attached to the top and bottom of the slider 29.
  • the slides 29 need not be mounted on a common side; It is also a variant with opposing slides 29 conceivable that can dive into each other in the form of rakes. Another variant is conceivable in which one or more slides 29 are not movable in the transport direction of the lower film 8 but orthogonally or obliquely thereto.
  • the cross-cutting station 4 can also be arranged exclusively or as a further cross-cutting station 4 between the forming station 2 and the sealing station 3 in order to cut (only) the lower film 8. Likewise, the arrangement of the cross cutting station 4 or another cross cutting station 4 between the material storage 9 and the sealing station 3 is conceivable to cut (only) the top film 10.

Abstract

The machine (1) has a longitudinal cutting station (5), and a transverse cutting station (4) comprising a punching device for separating a strip section from a lower foil (8) and/or an upper foil (10) by using a die cutter. The punching device is aligned transverse to a transport direction (R) of the foils. The transverse cutting station has a retaining container for retaining the strip section above the lower foil and/or the upper foil. The transverse cutting station has a slider that is moved in the container for temporarily supporting a part of the strip section. An independent claim is also included for a method for operating a deep-drawing packaging machine.

Description

Die Erfindung bezieht sich auf eine Tiefziehverpackungsmaschine gemäß dem Oberbegriff des Anspruchs 1, sowie auf ein Verfahren zum Betrieb einer Tiefziehverpackungsmaschine zum Stanzen von Streifenschnitten.The invention relates to a thermoforming packaging machine according to the preamble of claim 1, and to a method for operating a thermoforming packaging machine for punching strip cuts.

In Tiefziehverpackungsmaschinen wird üblicherweise in eine Unterfolie in einer Formstation eine Mulde geformt, darin ein Produkt eingelegt und die Mulde in einer Siegelstation mit einer Oberfolie unter Vakuum und/oder modifizierter Atmosphäre luftdicht versiegelt. Die so hergestellten Packungen hängen als Verbund über die Unterfolie zusammen und werden durch beidseitig angebrachte Klammerketten durch die Tiefziehverpackungsmaschine transportiert. Zum Vereinzeln der Verpackungen aus dem Verbund der Unter- und der Oberfolie kann eine Kombination einer Querschneidestation und einer nachfolgenden Längsschneidestation vorgesehen sein. In der Querschneidestation wird der Verbund der Unter- und der Oberfolie quer zur Transportrichtung geschnitten oder es werden, falls Radien an den Rändern der Verpackungen notwendig sind, Streifenschnitte ausgestanzt. Dabei kann das Messer von oben kommend die Streifenschnitte ausstanzen und die Streifenschnitte fallen nach unten. Falls der Platz für eine Einrichtung zum Sammeln innerhalb des Maschinengestells oder zum Heraustransportieren aus dem Maschinengestell nicht ausreichend vorhanden ist, kann das Stanzmesser von unten kommend die Streifenschnitte nach oben herausstanzen. Diese werden dann in einem Aufnahmebehälter nach jedem Schnitt weiter nach oben geschoben und können dann gesammelt entnommen werden. Bei Hochleistungsmaschinen sind die Aufnahmebehälter sehr hoch, um sie nicht laufend leeren zu müssen. Dabei werden die Streifenschnitte über einen Absatz geschoben, der sich oberhalb einer Folientransportebene befindet, und auf dem der zuletzt geschnittene Streifenschnitt teilweise mit seinem Rand aufliegt und somit verhindert wird, dass die darüber gestapelten Streifenschnitte nach unten in die Querschneidestation bzw. auf die zu schneidenden Verpackungen fallen. In letzterem Fall würde es zu Störungen in der Tiefziehverpackungsmaschine kommen.In thermoforming packaging machines, a trough is usually formed into a lower film in a forming station, a product is inserted therein, and the trough is hermetically sealed in a sealing station with a top film under vacuum and / or modified atmosphere. The packs produced in this way are bound together as a composite over the lower film and are transported through double-sided staple chains through the thermoforming packaging machine. For separating the packages from the composite of the lower and the upper film, a combination of a cross-cutting station and a subsequent longitudinal cutting station can be provided. In the cross-cutting station, the composite of the lower and the upper film is cut transversely to the transport direction or, if radii are necessary at the edges of the packaging, strip cuts are punched out. The knife coming from above can punch out the strip cuts and the strip cuts fall down. If the space for a device for collecting within the machine frame or for transporting out of the machine frame is not sufficiently available, the punching knife coming from below can punch out the strip cuts upwards. These are then pushed in a receptacle after each cut further up and can then be collected collected. In high-performance machines, the receptacles are very high, so they do not have to empty constantly. The strip cuts are pushed over a shoulder, which is located above a film transport plane, and on which the last cut strip cut partially rests with its edge and thus prevents the stacked strip cuts down into the cross cutting station or on the packaging to be cut fall. In the latter case, there would be disruptions in the thermoforming packaging machine.

Vor allem bei dünneren bzw. nicht biegesteifen Streifenschnitten ist das Risiko groß, dass das Gewicht der gestapelten Streifenschnitte nicht durch den untersten aufliegenden Streifenschnitt gehalten werden kann.Especially with thinner or non-rigid strip cuts the risk is great that the weight of the stacked strip cuts can not be held by the lowest resting strip cut.

Aufgabe der vorliegenden Erfindung ist es, eine Tiefziehverpackungsmaschine und ein Verfahren zu deren Betrieb zur Verfügung zu stellen, bei denen die vorher beschriebenen Nachteile beseitigt werden können.The object of the present invention is to provide a thermoforming packaging machine and a method for its operation, in which the disadvantages described above can be eliminated.

Diese Aufgabe wird gelöst durch eine Tiefziehverpackungsmaschine mit den Merkmalen des Anspruchs 1 bzw. durch ein Verfahren mit den Merkmalen des Anspruchs 7. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved by a thermoforming packaging machine with the features of claim 1 or by a method having the features of claim 7. Advantageous developments of the invention are specified in the subclaims.

Die erfindungsgemäße Tiefziehverpackungsmaschine zeichnet sich dadurch aus, dass sie wenigstens eine Querschneidestation und eine Längsschneidestation umfasst, wobei die Querschneidestation eine Stanzvorrichtung aufweist, um einen Streifenschnitt aus einer Unterfolie und/oder einer Oberfolie mittels eines Stanzmessers herauszutrennen, wobei die Stanzvorrichtung vorzugsweise im Wesentlichen quer zu einer Transportrichtung ausgerichtet ist und die Stanzvorrichtung einen Aufnahmebehälter zur Aufnahme des Streifenschnitt oberhalb der Unterfolie und/oder der Oberfolie aufweist. Dabei weist die Querschneidestation wenigstens einen Schieber auf, um einen Teil der Streifenschnitte, die sich in dem Aufnahmebehälter und über dem Schieber befinden, zu tragen. Bevorzugt wird der Schieber so nah wie möglich über der Transportebene der Unterfolie angeordnet. Durch einen solchen Schieber und seine Lage ist sichergestellt, dass die auf dem Schieber aufliegenden Streifenschnitte nicht auf die sich darunter befindenden Streifenschnitte drücken. Da sich zwischen der Transportebene der Unterfolie und dem Schieber nur wenige Streifenschnitte befinden, können diese durch ihr geringes Eigengewicht und trotz mangelnder Biegesteifigkeit, im Fall von dünnen Folien, von einem Absatz im Aufnahmebehälter getragen werden.The thermoforming packaging machine according to the invention is characterized in that it comprises at least one cross cutting station and a longitudinal cutting station, wherein the cross cutting station has a punching device for separating a strip cut from a lower film and / or a top film by means of a punching knife, wherein the punching device preferably substantially transversely to one Direction of transport is aligned and the punching device has a receptacle for receiving the strip cut above the lower film and / or the upper film. In this case, the cross-cutting station has at least one slider to carry a portion of the strip cuts, which are located in the receptacle and over the slide. Preferably, the slider is arranged as close as possible above the transport plane of the lower film. By such a slide and its location ensures that the resting on the slide strip cuts do not press on the strips below it strip sections. Since there are only a few strip cuts between the transport plane of the lower film and the slider, they can be carried by a small amount in the receptacle due to their low weight and despite the lack of flexural rigidity, in the case of thin films.

Der Schieber ist bevorzugt in einer Ebene, die im Wesentlichen parallel zu einer Transportebene der Unterfolie ist, im Aufnahmebehälter bewegbar, um ein sicheres Einschieben des Schiebers zwischen zwei Streifenschnitten zu gewährleisten.The slider is preferably in a plane which is substantially parallel to a transport plane of the lower film, movable in the receptacle to ensure a safe insertion of the slider between two strip sections.

Vorzugsweise weist die Stanzvorrichtung Halteelemente auf, um mehrere Streifenschnitte, die sich oberhalb der Transportebene der Unterfolie und unterhalb des Schiebers befinden, zu tragen. Solche Halteelemente ermöglichen das Tragen einzelner Streifenschnitte und sorgen somit für eine weitere Entlastung des untersten und zuletzt geschnittenen Streifenschnitts. Ein Herunterfallen dieses zuletzt geschnittenen Streifenschnitts und der darüberliegenden Streifenschnitte wird verhindert.Preferably, the punching device has holding elements in order to carry a plurality of strip cuts, which are located above the transport plane of the lower film and below the slide. Such holding elements make it possible to carry individual strip cuts and thus ensure further relief of the lowest and last cut strip section. Dropping of this last cut strip section and the overlying strip cuts is prevented.

Bevorzugt sind die Haltelemente sägezahnförmig ausgeführt, um zum Einen eine Auflage für wenigstens einen Teil der Streifenschnitte zur Verfügung zu stellen, und zum Anderen die Streifenschnitte leicht an den Absätzen der Haltelementen vorbei weiter nach oben schieben zu können. Dabei weisen die Halteelemente mehrere horizontale Absätze in unterschiedlichen Höhen auf, zwischen denen eine Schräge angebracht ist.Preferably, the holding elements are designed as a sawtooth to provide a support for at least a portion of the strip cuts available, and on the other hand, the strip cuts easily on the heels of the holding elements over to push upwards. In this case, the holding elements on several horizontal paragraphs at different heights, between which a slope is attached.

Der Schieber weist vorzugsweise eine geschrägte Vorderkante auf, damit das Eintauchen des Schiebers zwischen zwei übereinanderliegende Streifenschnitte sichergestellt ist. Dabei kann der Schieber als ebene Platte oder in Form eines Rechens oder einer Gabel ausgeführt sein.The slider preferably has a beveled leading edge, so that the immersion of the slider between two superimposed strip cuts is ensured. In this case, the slide can be designed as a flat plate or in the form of a rake or a fork.

Bevorzugt ist der Schieber mittels eines pneumatischen Antriebs, beispielsweise eines Pneumatikzylinders, oder eines elektrischen Antriebs, beispielsweise eines Servomotors oder eines Elektromagneten, antreibbar, um eine schnelle Bewegung und eine exakte Position des Schiebers gegenüber den Streifenschnitten zu gewährleisten.Preferably, the slide by means of a pneumatic drive, such as a pneumatic cylinder, or an electric drive, such as a servo motor or an electromagnet, driven to ensure rapid movement and an exact position of the slider relative to the strip sections.

Ein erfindungsgemäßes Verfahren zum Betrieb einer Tiefziehverpackungsmaschine sieht wenigstens eine Querschneidestation und eine Längsschneidestation vor, wobei die Querschneidestation eine Stanzvorrichtung aufweist, um einen Streifenschnitt aus einer Unterfolie und/oder einer Oberfolie mittels eines Stanzmessers herauszutrennen, und ein Schieber vor oder während eines Stanzvorganges von den Streifenschnitten wegbewegt wird, ein weiterer Streifenschnitt nach oben geschoben wird und anschließend der Schieber zwischen zwei benachbarten und übereinanderliegenden Streifenschnitte hineinbewegt wird, um die sich über dem Schieber befindenden Streifenschnitte zu tragen. Somit ist sichergestellt, dass die Schieberbewegung ausgeführt wird, solange ein Stapel von Streifenschnitten in Ruhe befindlich ist.A method according to the invention for operating a thermoforming packaging machine provides at least one cross cutting station and one longitudinal cutting station, wherein the cross cutting station has a punching device for separating a strip cut from a lower film and / or a top film by means of a punching knife, and a slide before or during a punching operation of the strip cuts is moved away, another strip section is pushed upwards and then the slider is moved in between two adjacent and superimposed strip sections to carry the strip cuts located above the slider. Thus, it is ensured that the slider movement is carried out as long as a stack of strip cuts is at rest.

Vorzugsweise wird die Bewegung des Schiebers mittels einer Steuerung ausgeführt, da die Steuerung über alle Informationen der Maschinenabläufe und speziell der Sensoren und Aktoren der Querschneidestation verfügt und somit einen effizienten und prozesssicheren Ablauf gewährleisten kann.Preferably, the movement of the slider is carried out by means of a controller, since the controller has all the information about the machine processes and especially the sensors and actuators of the cross-cutting station and thus can ensure an efficient and reliable process.

Vorzugsweise ist der Schieber aus dem Stapel von Streifenschnitten in einem Aufnahmebehälter herausbewegt, bevor das Stanzmesser den Stanzvorgang beginnt bzw. das Stanzmesser mit der Unterfolie in Kontakt kommt oder der Transport der Unterfolie und Oberfolie in die Querschneidestation beendet ist.Preferably, the slider is moved out of the stack of strip sections in a receptacle before the punching knife begins the punching process or the punching knife comes into contact with the lower film or the transport of the lower film and upper film is terminated in the cross cutting station.

Der Schieber wird bevorzugt in den Stapel von Streifenschnitten im Aufnahmebehälter bewegt, bevor das Stanzmesser nach dem Stanzvorgang wieder nach unten bewegt wird, um alle über dem Schieber befindlichen Streifenschnitte zu tragen und die sich darunter befindenden Streifenschnitte zu entlasten.The pusher is preferably moved into the stack of strip cuts in the receptacle before the punching knife is moved downwardly after the punching operation to carry all the strip cuts over the pusher and to relieve the strip cuts underneath.

Im Folgenden wird ein vorteilhaftes Ausführungsbeispiel der erfindungsgemäßen Tiefziehverpackungsmaschine und des erfindungsgemäßen Verfahrens anhand einer Zeichnung näher erläutert. Im Einzelnen zeigen:

Figur 1
eine schematische Ansicht einer erfindungsgemäßen Tiefziehverpackungsmaschine,
Figur 2
eine schematische Ansicht einer Querschneidestation,
Figur 3
eine schematische Ansicht in den oberen Bereich einer Querschneidestation,
Figur 4
eine Draufsicht auf die Querschneidestation.
In the following, an advantageous embodiment of the thermoforming packaging machine according to the invention and the method according to the invention is explained in more detail with reference to a drawing. In detail show:
FIG. 1
a schematic view of a thermoforming packaging machine according to the invention,
FIG. 2
a schematic view of a cross cutting station,
FIG. 3
a schematic view in the upper region of a cross-cutting station,
FIG. 4
a plan view of the cross cutting station.

Einander entsprechende Komponenten sind in den Figuren durchgängig mit gleichem Bezugszeichen versehen.Corresponding components are consistently provided in the figures with the same reference numerals.

Figur 1 zeigt in schematischer Ansicht eine erfindungsgemäße Verpackungsmaschine in Form einer Tiefziehverpackungsmaschine 1. Die Tiefziehverpackungsmaschine 1 weist eine Formstation 2, eine Siegelstation 3, eine Querschneidestation 4 und eine Längsschneidestation 5 auf, die in dieser Reihenfolge in eine Arbeitsrichtung R an einem Maschinengestell 6 angeordnet sind. Eingangsseitig befindet sich an dem Maschinengestell 6 eine Zufuhrrolle 7, von der eine Unterfolie 8 abgezogen wird. Im Bereich der Siegelstation 3 ist ein Materialspeicher 9 vorgesehen, von dem eine Oberfolie 10 abgezogen wird. Ausgangsseitig ist an der Verpackungsmaschine eine Abfuhreinrichtung 13 in Form eines Transportbandes vorgesehen, mit der fertige, vereinzelte Verpackungen 21 abtransportiert werden. Ferner weist die Verpackungsmaschine 1 eine nicht dargestellte Vorschubeinrichtung auf, die die Unterfolie 8 ergreift und in einem Hauptarbeitstakt taktweise in der Arbeitsrichtung R weitertransportiert. Die Vorschubeinrichtung kann zum Beispiel durch seitlich angeordnete Transportketten realisiert sein und die Unterfolie 8 in einer Transportebene E transportieren. FIG. 1 shows a schematic view of a packaging machine according to the invention in the form of a thermoforming packaging machine 1. The thermoforming packaging machine 1 has a forming station 2, a sealing station 3, a cross-cutting station 4 and a longitudinal cutting station 5, which are arranged in this order in a direction R on a machine frame 6. On the input side is located on the machine frame 6, a feed roller 7, from which a lower film 8 is withdrawn. In the region of the sealing station 3, a material reservoir 9 is provided, from which a top film 10 is drawn off. On the output side, a discharge device 13 in the form of a conveyor belt is provided on the packaging machine, with the finished, isolated packaging 21 are transported away. Furthermore, the packaging machine 1, a feed device, not shown, which engages the lower film 8 and transported in a main working cycle in cycles in the direction of R. The feed device can be realized, for example, by laterally arranged transport chains and transport the lower film 8 in a transport plane E.

In der dargestellten Ausführungsform ist die Formstation 2 als eine Tiefziehstation ausgebildet, in der in der Unterfolie 8 durch Tiefziehen Behälter 14 geformt werden. Dabei kann die Formstation 2 derart ausgebildet sein, dass in der Richtung senkrecht zur Arbeitsrichtung R mehrere Behälter nebeneinander gebildet werden. In Arbeitsrichtung R hinter der Formstation 2 ist eine Einlegestrecke 15 vorgesehen, in der die in der Unterfolie 8 geformten Behälter 14 mit Produkten 16 befüllt werden.In the illustrated embodiment, the forming station 2 is formed as a thermoforming station in which containers 14 are formed in the lower film 8 by deep drawing. In this case, the forming station 2 may be designed such that in the direction perpendicular to the working direction R a plurality of containers are formed side by side. In the working direction R behind the forming station 2, an insertion path 15 is provided, in which the containers 14 formed in the lower film 8 are filled with products 16.

Die Siegelstation 3 verfügt über eine verschließbare Kammer 17, in der die Atmosphäre in dem Behälter 14 vor dem Versiegeln zum Beispiel durch Gasspülen mit einem Austauschgas oder mit einem Austausch-Gasgemisch ersetzt werden kann.The sealing station 3 has a closable chamber 17 in which the atmosphere in the container 14 can be replaced with a replacement gas or exchange gas mixture prior to sealing, for example, by gas purging.

Die Querschneidestation 4 ist als Streifenstanze ausgebildet, die die Unterfolie 8 und die Oberfolie 10 in einer Richtung quer zur Arbeitsrichtung R zwischen benachbarten Behältern 14 durchtrennt. Dabei arbeitet die Querschneidestation 4 derart, dass die Unterfolie 8 nicht über die gesamte Breite aufgetrennt wird, sondern zumindest in einem Randbereich und zwischen zwei benachbarten Behältern 14 nicht durchtrennt wird. Dies ermöglicht einen kontrollierten Weitertransport der Behälter 14 durch die Vorschubeinrichtung.The cross cutting station 4 is designed as a strip punch, which cuts through the lower film 8 and the upper film 10 in a direction transverse to the working direction R between adjacent containers 14. In this case, the cross-cutting station 4 operates such that the lower film 8 is not separated over the entire width, but at least in an edge region and between two adjacent containers 14 is not severed. This allows a controlled onward transport of the container 14 by the feed device.

Die Längsschneidestation 5 ist in der dargestellten Ausführungsform als eine Messeranordnung ausgebildet, mit der die Unterfolie 8 und die Oberfolie 10 zwischen benachbarten Behältern 14 und am seitlichen Rand der Unterfolie 8 durchtrennt werden, so dass hinter der Längsschneidestation 5 vereinzelte Verpackungen 21 vorliegen.In the illustrated embodiment, the longitudinal cutting station 5 is designed as a knife arrangement with which the lower film 8 and the upper film 10 are severed between adjacent containers 14 and at the lateral edge of the lower film 8 so that individual packages 21 are present behind the longitudinal cutting station 5.

Die Verpackungsmaschine 1 verfügt ferner über eine Steuerung 18. Sie hat die Aufgabe, die in der Verpackungsmaschine 1 ablaufenden Prozesse zu steuern und zu überwachen. Eine Anzeigevorrichtung 19 mit Bedienelementen 20 dient zum Visualisieren bzw. Beeinflussen der Prozessabläufe in der Tiefziehverpackungsmaschine 1 für bzw. durch einen Bediener.The packaging machine 1 also has a controller 18. It has the task of controlling and monitoring the processes taking place in the packaging machine 1. A display device 19 with operating elements 20 serves to visualize or influence the process sequences in the thermoforming packaging machine 1 for or by an operator.

Die generelle Arbeitsweise der Verpackungsmaschine 1 wird im Folgenden kurz dargestellt.The general mode of operation of the packaging machine 1 will be briefly described below.

Die Unterfolie 8 wird von der Zufuhrrolle 7 abgezogen und durch die Vorschubeinrichtung in die Formstation 2 transportiert. In der Formstation 2 werden durch Tiefziehen Behälter 14 in die Unterfolie 8 gebildet. Die Behälter 14 werden zusammen mit dem umgebenden Bereich der Unterfolie 8 in einem Hauptarbeitstakt zu der Einlegestrecke 15 weitertransportiert, in der sie mit Produkt 16 befüllt werden.The lower film 8 is withdrawn from the feed roller 7 and transported by the feed device into the forming station 2. In the forming station 2 containers 14 are formed by deep drawing in the lower film 8. The containers 14 are used together with the surrounding Area of the lower film 8 transported in a main working cycle to the insertion path 15 in which they are filled with product 16.

Anschließend werden die befüllten Behälter 14 zusammen mit dem sie umgebenden Bereich der Unterfolie 8 in dem Hauptarbeitstakt durch die Vorschubeinrichtung in die Siegelstation 3 weitertransportiert. Die Oberfolie 10 wird nach einem Ansiegelvorgang an die Unterfolie 8 mit der Vorschubbewegung der Unterfolie 8 weitertransportiert. Dabei wird die Oberfolie 10 von dem Materialspeicher 9 abgezogen. Durch das Ansiegeln der Oberfolie 10 an die Behälter 14 entstehen verschlossene Verpackungen 21.Subsequently, the filled containers 14 are transported along with the surrounding area of the lower film 8 in the main working cycle by the feed device in the sealing station 3. The top film 10 is transported on to the lower film 8 with the advancing movement of the lower film 8 after a sealing operation. In this case, the upper film 10 is withdrawn from the material storage 9. By sealing the upper film 10 to the container 14, sealed packages 21 are formed.

Figur 2 zeigt eine Querschneidestation 4 mit einer Stanzvorrichtung 22, die mittels eines pneumatischen Antriebs 23 ein Stanzmesser 24 nach oben gegen die nicht dargestellte Unterfolie 8 und Oberfolie 10 bewegt und dabei einen Streifenschnitt 25 (siehe Figur 4) aus dem Verbund der Unterfolie 8 und Oberfolie 10 heraustrennt. In der weiteren Aufwärtsbewegung wird der Streifenschnitt 25 so weit transportiert, dass er durch Halteelemente 26 gegen ein Herabfallen getragen wird. FIG. 2 shows a cross-cutting station 4 with a punching device 22 which moves by means of a pneumatic drive 23, a punching knife 24 up against the lower film 8 and upper film 10, not shown, while a strip cut 25 (see FIG. 4 ) separates out of the composite of the lower film 8 and upper film 10. In the further upward movement of the strip cut 25 is transported so far that it is supported by holding elements 26 against falling down.

Weitere Streifenschnitte 25 werden in den folgenden Hauptarbeitstakten nach oben in einen Aufnahmebehälter 27 nachgeschoben. Sobald der Stapel von Streifenschnitten 25 eine entsprechende Höhe im oberen Bereich des Aufnahmebehälters 27 erreicht hat, fallen die obersten Streifenschnitte 25 seitlich auf eine Abführung 28 und können anschließend einer Sammeleinrichtung zugeführt werden.Further strip cuts 25 are pushed in the following main working cycles upwards in a receptacle 27. As soon as the stack of strip cuts 25 has reached a corresponding height in the upper region of the receiving container 27, the uppermost strip cuts 25 fall laterally onto a discharge 28 and can subsequently be supplied to a collecting device.

In Figur 3 sind zwei Schieber 29, die die Form eines Rechens oder einer Gabel aufweisen, gezeigt, die im Aufnahmebehälter 27 mittels Pneumatikzylindern 30 in Richtung eines nicht dargestellten Stapels von Streifenschnitten 25 und wieder zurück bewegbar sind. Der Stapel mit den Streifenschnitten 25 wird durch Führungen 31 so geführt, dass die Lage der einzelnen Streifenschnitte 25 in Quer- und Längsrichtung erhalten bleibt. Die Halteelemente 26 weisen sägezahnförmige Absätze 32 auf, die einen Randbereich eines Streifenabschnitts 25 halten, damit dieser nicht wieder in die Stanzvorrichtung 22 zurückfällt, während das Stanzmesser 24 nach unten in eine Parkposition zurückbewegt wird. Im folgenden Hauptarbeitstakt wird ein nächster Streifenschnitt 25 nach oben geschoben und schiebt dabei den vorigen Streifenschnitt 25 um einen Absatz 32 an den Halteelementen 26 weiter nach oben. Die horizontalen Absätze 32 sind in unterschiedlichen Höhen an dem Halteelement 26 angeordnet.In FIG. 3 are two slides 29, which have the shape of a rake or a fork shown, which are movable in the receptacle 27 by means of pneumatic cylinders 30 in the direction of a stack of strip sections 25, not shown, and back again. The stack with the strip cuts 25 is guided by guides 31 so that the position of the individual strip cuts 25 is maintained in the transverse and longitudinal direction. The holding elements 26 have sawtooth-shaped shoulders 32, which hold an edge region of a strip portion 25 so that it does not fall back into the punching device 22, while the punching knife 24 is moved back down to a parking position. In the following main working cycle, a next strip cut 25 is pushed upward, thereby pushing the previous strip cut 25 further upwards around a shoulder 32 on the holding elements 26. The horizontal shoulders 32 are arranged at different heights on the holding element 26.

In Figur 4 sind die Schieber 29 in zwei Positionen dargestellt. Der in der Draufsicht linksseitig dargestellte Schieber 29 ist in einer Position außerhalb des Stapels mit den Streifenschnitten 25 und der rechtsseitig dargestellte Schieber 29 befindet sich in der Position, in der er zwischen zwei Streifenschnitten 25 des Staples bewegt wird und somit die sich oberhalb befindlichen Streifenschnitte 25 gegen ein Herunterfallen trägt. Die Bewegung der Schieber 29 erfolgt vorzugsweise synchron. Die Bewegung der Schieber 29 in den Stapel mit Streifenschnitten 25 erfolgt, sobald das Stanzmesser 24 den Stanzvorgang in der obersten Position abgeschlossen hat. Sobald die Schieber 29 eingefahren sind und den oberen Teil des Stapels tragen, bewegt sich das Stanzmesser 24 nach unten. Die Schieber 29 sind in oder am Aufnahmebehälter 27 direkt oberhalb der Stanzvorrichtung 22 angebracht, damit sich nur wenige Streifenschnitte 25 zwischen der Transportebene E der Unterfolie 8 und den Schiebern 29 befinden.In FIG. 4 the slides 29 are shown in two positions. The slide 29 shown on the left-hand side in the plan view is in a position outside the stack with the strip cuts 25 and the slide 29 shown on the right is in the position in which it is moved between two strip cuts 25 of the stack and thus the strip cuts 25 located above bears against falling down. The movement of the slide 29 is preferably synchronous. The movement of the slider 29 in the stack with strip cuts 25 takes place as soon as the punching knife 24 has completed the punching operation in the uppermost position. Once the slides 29 are retracted and carry the upper part of the stack, the punching blade 24 moves down. The slides 29 are mounted in or on the receptacle 27 directly above the punching device 22 so that only a few strip cuts 25 between the transport plane E of the lower film 8 and the sliders 29 are.

Die Schieber 29 weisen vorzugsweise eine Anschrägung im vorderen Bereich 31 auf. Diese Anschrägung kann auch an der Ober- und Unterseite des Schiebers 29 angebracht sein. Die Schieber 29 müssen nicht auf einer gemeinsamen Seite angebracht sein; es ist auch eine Variante mit gegenüberliegenden Schiebern 29 denkbar, die dabei in Form von Rechen ineinander eintauchen können. Es ist auch eine weitere Variante denkbar, bei der ein oder mehrere Schieber 29 nicht in Transportrichtung der Unterfolie 8 sondern orthogonal oder schräg dazu bewegbar sind.The slides 29 preferably have a bevel in the front region 31. This chamfer can also be attached to the top and bottom of the slider 29. The slides 29 need not be mounted on a common side; It is also a variant with opposing slides 29 conceivable that can dive into each other in the form of rakes. Another variant is conceivable in which one or more slides 29 are not movable in the transport direction of the lower film 8 but orthogonally or obliquely thereto.

Die Querschneidestation 4 kann auch ausschließlich oder als eine weitere Querschneidestation 4 zwischen der Formstation 2 und der Siegelstation 3 angeordnet sein, um (nur) die Unterfolie 8 zu schneiden. Ebenso ist die Anordnung der Querschneidestation 4 oder einer weiteren Querschneidestation 4 zwischen dem Materialspeicher 9 und der Siegelstation 3 denkbar, um (nur) die Oberfolie 10 zu schneiden.The cross-cutting station 4 can also be arranged exclusively or as a further cross-cutting station 4 between the forming station 2 and the sealing station 3 in order to cut (only) the lower film 8. Likewise, the arrangement of the cross cutting station 4 or another cross cutting station 4 between the material storage 9 and the sealing station 3 is conceivable to cut (only) the top film 10.

Claims (9)

Tiefziehverpackungsmaschine (1), umfassend wenigstens eine Querschneidestation (4) und eine Längsschneidestation (5), wobei die Querschneidestation (4) eine Stanzvorrichtung (22) aufweist, um einen Streifenschnitt (25) aus einer Unterfolie (8) und/oder einer Oberfolie (10) mittels eines Stanzmessers (24) herauszutrennen, wobei die Stanzvorrichtung (22) vorzugsweise quer zu einer Transportrichtung (R) der Folie (8, 10) ausgerichtet ist, und wobei die Querschneidestation (4) einen Aufnahmebehälter (27) zur Aufnahme des Streifenschnitt (25) oberhalb der Unterfolie (8) und/oder der Oberfolie (10) aufweist, dadurch gekennzeichnet, dass die Querschneidestation (4) wenigstens einen Schieber (29) aufweist, wobei der Schieber (29) in dem Aufnahmebehälter (27) bewegbar ist, um temporär einen Teil der Streifenschnitte (25), die sich in dem Aufnahmebehälter (27) und über dem Schieber (29) befinden, zu tragen.Thermoforming packaging machine (1), comprising at least one cross-cutting station (4) and one longitudinal cutting station (5), wherein the cross-cutting station (4) has a punching device (22) to form a strip cut (25) from a lower film (8) and / or a top film ( 10) by means of a punching knife (24), wherein the punching device (22) preferably transversely to a transport direction (R) of the film (8, 10) is aligned, and wherein the cross-cutting station (4) has a receptacle (27) for receiving the strip section (25) above the lower film (8) and / or the upper film (10), characterized in that the cross-cutting station (4) has at least one slide (29), wherein the slide (29) in the receptacle (27) is movable for temporarily carrying a portion of the strip cuts (25) located in the receptacle (27) and over the slider (29). Tiefziehverpackungsmaschine nach Anspruch 1, dadurch gekennzeichnet, dass der Schieber (29) in einer Ebene im Wesentlichen parallel zu einer Transportebene (E) der Unterfolie (8) bewegbar ist.Thermoforming packaging machine according to claim 1, characterized in that the slide (29) in a plane substantially parallel to a transport plane (E) of the lower film (8) is movable. Tiefziehverpackungsmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Stanzvorrichtung (22) Halteelemente (26) aufweist, um Streifenschnitte (25), die sich oberhalb der Transportebene (E) der Unterfolie (8) und unterhalb des Schiebers (29) befinden, zu tragen.Thermoforming packaging machine according to one of the preceding claims, characterized in that the punching device (22) has holding elements (26) to strip strips (25) which are above the transport plane (E) of the lower film (8) and below the slide (29), to wear. Tiefziehverpackungsmaschine nach Anspruch 3, dadurch gekennzeichnet, dass die Halteelemente (26) sägezahnförmig ausgebildet sind.Thermoforming packaging machine according to claim 3, characterized in that the holding elements (26) are formed like a sawtooth. Tiefziehverpackungsmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schieber (29) eine geschrägte Vorderkante aufweist.Thermoforming packaging machine according to one of the preceding claims, characterized in that the slide (29) has a beveled leading edge. Tiefziehverpackungsmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schieber (29) mittels eines pneumatischen oder eines elektrischen, vorzugsweise eines servomotorischen, Antriebs (30) antreibbar ist.Thermoforming packaging machine according to one of the preceding claims, characterized in that the slide (29) by means of a pneumatic or an electric, preferably a servo-motor, drive (30) can be driven. Verfahren zum Betrieb einer Tiefziehverpackungsmaschine (1), die wenigstens eine Querschneidestation (4) und eine Längsschneidestation (5) umfasst, wobei die Querschneidestation (4) eine Stanzvorrichtung (22) aufweist, um einen Streifenschnitt (25) aus einer Unterfolie (8) und/oder einer Oberfolie (10) mittels eines Stanzmessers (24) herauszutrennen, dadurch gekennzeichnet, dass wenigstens ein Schieber (29) vor oder während eines Stanzvorganges von den Streifenschnitten (25) wegbewegt wird und mindestens ein Streifenschnitt (25) am Schieber (29) vorbei nach oben geschoben wird und anschließend der Schieber (29) zwischen zwei benachbarte und übereinanderliegende Streifenschnitte (25) hineinbewegt wird, um die sich über dem Schieber (29) befindenden Streifenschnitte (25) zu tragen.Method for operating a thermoforming packaging machine (1) comprising at least one cross cutting station (4) and one longitudinal cutting station (5), the cross cutting station (4) having a punching device (22) for forming a strip cut (25) from a lower film (8) and / or a top film (10) by means of a punching knife (24), characterized in that at least one slide (29) before or during a punching operation of the strip cuts (25) is moved away and at least one strip cut (25) on the slide (29) is pushed past upwards and then the slider (29) between two adjacent and superimposed strip cuts (25) is moved to carry over the slide (29) located strip cuts (25). Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass der Schieber (29) aus einem Stapel von Streifenschnitten (25) im Aufnahmebehälter (27) herausbewegt ist, bevor das Stanzmesser (24) den Stanzvorgang beginnt bzw. das Stanzmesser (24) mit der Unterfolie (8) in Kontakt kommt oder der Transport der Unterfolie (8) und Oberfolie (10) in die Querschneidestation (4) beendet ist.A method according to claim 7, characterized in that the slide (29) from a stack of strip cuts (25) in the receptacle (27) is moved out before the punching knife (24) starts the punching process or the punching knife (24) with the lower film ( 8) comes into contact or the transport of the lower film (8) and upper film (10) in the cross-cutting station (4) is completed. Verfahren nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Schieber (29) in einen Stapel von Streifenschnitten (25) im Aufnahmebehälter (27) bewegt wird, bevor das Stanzmesser (24) nach dem Stanzvorgang wieder nach unten bewegt wird.Method according to claim 7 or 8, characterized in that the slide (29) is moved into a stack of strip cuts (25) in the receiving container (27) before the punching knife (24) is moved downwards again after the punching process.
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US8752357B2 (en) 2014-06-17

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