CN105772722A - Control device, equipment and method for controlling electrohydrodynamics printing resolution - Google Patents
Control device, equipment and method for controlling electrohydrodynamics printing resolution Download PDFInfo
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- 238000002347 injection Methods 0.000 claims description 24
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- 238000007689 inspection Methods 0.000 claims description 23
- 230000001276 controlling effect Effects 0.000 claims description 20
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/10—Formation of a green body
- B22F10/18—Formation of a green body by mixing binder with metal in filament form, e.g. fused filament fabrication [FFF]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/22—Direct deposition of molten metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/80—Data acquisition or data processing
- B22F10/85—Data acquisition or data processing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/90—Means for process control, e.g. cameras or sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a control device, equipment and method for controlling the electrohydrodynamics printing resolution. The control device for controlling the electrohydrodynamics printing resolution comprises a magnetic field generation device used for generating centripetal Lorentz force and a controller connected with the magnetic field generation device. The controller is connected with two vision detection devices. A closed-loop control circuit is formed by the vision detection devices, the controller and the magnetic field generation device. An annular magnetic field is generated through an annular electromagnetic induction coil in a jetted liquid drop flying area, the movement of electrified liquid drops in the annular magnetic field is subjected to the effect of the centripetal Lorentz force, control parameters of the control device are adjusted in real time according to detection results of the vision detection devices so that the centripetal Lorentz force can be changed, the movement of the electrified liquid drops is effectively restrained, diffusion of the liquid drops to the periphery is restrained, the flying angle of the liquid drops is reduced, and therefore the electrohydrodynamics printing resolution is increased.
Description
Technical field
The present invention relates to electrohydrodynamics printing technique field, particularly relate to a kind of control device controlling electrohydrodynamics print resolution and printing device and control method.
Background technology
Inkjet technology obtains extensive concern in micro-nano process technology, such as flexible electronic circuit, wearable electronic, solaode, biological function device, microchannel chip etc..Conventional ink-jet Method of printing generally adopts steam alveolitoid and piezo-electric type type of drive, they all adopt the driving principle of extrusion type, and inkjet printing live width is typically in 20-50um, along with jet size reduces, forming injection drop and need bigger pressure, solution viscosity then makes nozzle be easier to block.Heating is needed for steam alveolitoid inkjet printing, but ink performance is produced impact by high temperature；Printing for piezoelectric type ink-jet and can cause the problems such as drop location is inaccurate owing to piezoelectric effect produces vibration, therefore conventional ink-jet Method of printing is not suitable for the micro-nano device that stamp with the size is less.
Electrohydrodynamics printing technique is applying certain voltage between substrate and nozzle, under induction electric field force effect, in solution, the electric charge of movement is assembled at liquid surface, Coulomb force between electric charge causes that liquid surface produces tangential stress, under the effect of shearing force, the solution printed forms cone liquid level in nozzle tip, along with electric field intensity increases, liquid overcomes surface tension, produces jet or drop in cone tip.Owing to jet or drop are to produce in cone tip, liquid-drop diameter is generally much smaller than nozzle diameter, therefore can realize high-resolution and print.But the jet ejected or drip gauge have worn like charges, between identical charges, there is repulsive force, cause that drop surface can be spread to surrounding, thus affecting electrohydrodynamics print resolution.Some researcheres improve, by increasing electric field intensity, reduce nozzle outlet diameter and reducing the methods such as jet length, the resolution that electrohydrodynamics prints, but nozzle diameter and jet length are subject to the geometric parameter constraint of technological requirement, resolution generally can reach about 10um.
In sum, high-resolution printing is restricted by existing electrohydrodynamics Method of printing, and its resolution is difficult to be further enhanced, and therefore the electrohydrodynamics printing technique of this mode is difficult to meet the printing requirement of high-resolution micro-nano device.
And application number is CN201510966964.6, the Chinese invention patent that publication date is 2016.3.2 discloses a kind of 3D metallic print system based on magnetic field regulation and control, by adjusting the stray magnetic field strength printing positioner in real time, change the movement locus of charged metal microdroplet, realizing accurately being deposited on the platform of model apparatus for placing, the resolution that the method does not relate to electrohydrodynamics is printed is controlled.
Summary of the invention
An object of the present invention is in that, it is difficult to the defects such as high-resolution micro-nano device printing for existing electrohydrodynamics printing technique, a kind of control device controlling electrohydrodynamics print resolution is proposed, break through existing electrohydrodynamics printing technique and high-resolution micro-nano device is being printed restriction, it is achieved the printing of high resolution micronano rice device and the preparation of micro nano structure device.
The present invention provides: a kind of control device controlling electrohydrodynamics print resolution, it includes the field generator for magnetic for producing centripetal Lorentz force, the controller for adjusting centripetal Lorentz force size being connected with field generator for magnetic, described controller and two vision inspection apparatus connect, and described vision inspection apparatus, controller and field generator for magnetic constitute close loop control circuit.
Described field generator for magnetic is wrapped on annular core is constituted by least one annular electro magnetic induction coil.
Multiple annular core stackings are arranged, and are wound around annular electro magnetic induction coil on each annular core respectively.
nullA kind of printing device controlling device with above-mentioned control electrohydrodynamics print resolution，It includes motion platform，Arrange on the moving platform in order to fixing carrying for the electrically-conductive backing plate as pattern printed substrates，Printing equipment is set electrically-conductive backing plate is fixed above，It has the conduction shower nozzle for ink-jet，To carry out pattern printing in ink-jet to electrically-conductive backing plate，Described conduction shower nozzle is connected with flow pump，It is connected high-voltage pulse power source between conduction shower nozzle and electrically-conductive backing plate，The control device of above-mentioned control electrohydrodynamics print resolution is set between described conduction shower nozzle and electrically-conductive backing plate，The drop of described conduction shower nozzle injection is fallen on electrically-conductive backing plate through the field generator for magnetic of this electrohydrodynamics print control unit，In the side of the drippage flight space of injection drop, two vision inspection apparatus are set，First look detecting device prints the drippage process of solution for detecting，Second vision inspection apparatus is for detecting injection drop deposition results on electrically-conductive backing plate，And First look detecting device and the second vision inspection apparatus respectively with controller feedback link.
The control device of control electrohydrodynamics print resolution disclosed in this invention, the toroidal magnetic field produced by annular electro magnetic induction coil in injection droplet flight region, charged drop athletic meeting in magnetic field is subject to the effect of centripetal Lorentz force, charged drop moved into row constraint, restricting liquid drop spreads to surrounding, reduce droplet flight angle, thus improving the resolution that electrohydrodynamics prints.
The two of the object of the invention are in that to provide the control method of a kind of printing device controlling device with above-mentioned control electrohydrodynamics print resolution, and it comprises the following steps:
One, print parameters is carried out pretreatment, including to the voltage of high-voltage pulse power source and frequency, conduction shower nozzle and the distance of electrically-conductive backing plate, field generator for magnetic the parameter such as electric current be adjusted；
Two, printing equipment is controlled,
(1) flow pump is controlled so that print solution and supply with certain flow,
(2) between conduction shower nozzle and electrically-conductive backing plate that high-voltage pulse power source both positive and negative polarity connects respectively, the voltage of the high-voltage pulse power source of acquisition in step one and the process data of frequency parameter are applied, form induction electric field, the printing solution making conduction shower nozzle top forms taylor cone
(3) electric field force suffered by solution at conduction shower nozzle place is regulated so that it is overcome solution surface tension so that print solution and form drop,
(4) drop Jet with downward flow direction under the effect of induction electric field force, flight range at injection drop, according to current value to field generator for magnetic pretreatment in step one, controller is applied corresponding current value, the conduction drop of injection is subject to the centripetal Lorentz force effect that field generator for magnetic produces, under the constraint of centripetal Lorentz force, conduction drop deposits on electrically-conductive backing plate, forms high-resolution print pattern.
Three, the drippage process of injection drop and the deposition results of electrically-conductive backing plate are detected by two vision inspection apparatus respectively, and testing result is sent to controller, according to testing result, the corresponding parameter that controls controlling in device controlling electric current kinetics print resolution is adjusted by controller in real time, thus improving the resolution of electrohydrodynamics print pattern.
In step one, print parameters is carried out pretreatment by method or coupling of multiple physics software by experiment.
The control device of the control electrohydrodynamics print resolution of the present invention and control method can be used for the high resolution printed of the different types of functional device such as electronic device and biological function device, wherein electronic device includes the device such as conventional electronics and flexible electronic device, MEMS, sensor, biological function device includes the devices such as biological support, biochip and biosensor, and it prints the solution adopted is the conducting solution such as polymer or metal nanoparticle solution.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of the toroidal magnetic field of the present invention.
Fig. 3 is the force analysis figure that the conductive liquid of the present invention drops in toroidal magnetic field.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated:
The present invention provides: a kind of control device controlling electrohydrodynamics print resolution, it includes the field generator for magnetic 4 for producing centripetal Lorentz force, the controller 1 for adjusting centripetal Lorentz force size being connected with field generator for magnetic 4, described controller 1 is connected with two vision inspection apparatus 2, and described vision inspection apparatus 2, controller 1 and field generator for magnetic 4 constitute close loop control circuit.
nullDescribed field generator for magnetic 4 is wrapped on annular core is constituted by least one annular electro magnetic induction coil，Multiple annular core stackings are arranged，And each annular core is wound around annular electro magnetic induction coil respectively，When being changed by the electric current of annular electro magnetic induction coil，Produced by it, centripetal Lorentz force also can change，According to this principle，Centripetal Lorentz force is utilized to overcome the coaxial repulsion sprayed between the like charges that drop produces in the energized state of electrohydrodynamics printing device，Avoid droplets from surface can occur to spread to surrounding，Thus improving the resolution that electrohydrodynamics prints，And by the vision inspection apparatus arranged，For detecting injection drop in real time in flight course and the deposition results that drops on electrically-conductive backing plate，By real-time detection，And testing result is sent to controller，Enable the controller in real time the electric current of annular electro magnetic induction coil is adjusted，Thus ensureing that the centripetal Lorentz force that field generator for magnetic produces can be good at overcoming the institute's coaxial repulsion with like charges of drop itself.
nullThe invention also discloses a kind of printing device controlling device adopting and controlling electrohydrodynamics print resolution，It includes motion platform 5，Motion platform 5 is arranged in order to fixing carrying for the electrically-conductive backing plate 6 as pattern printed substrates，Owing to motion platform can drive electrically-conductive backing plate to move，Print thus realizing pattern，Printing equipment is set electrically-conductive backing plate 6 is fixed above，It has the conduction shower nozzle 3 for ink-jet，For in ink-jet to electrically-conductive backing plate 6 to carry out pattern printing，Described conduction shower nozzle 3 is connected with flow pump，It is connected high-voltage pulse power source between conduction shower nozzle and electrically-conductive backing plate，On the basis of existing electrohydrodynamics printing device，The control device controlling electrohydrodynamics print resolution is installed additional between conduction shower nozzle and electrically-conductive backing plate，It is arranged by multiple annular core stackings，And each annular core is wound around field generator for magnetic that annular electro magnetic induction coil is constituted respectively，Then it is placed between conduction shower nozzle and electrically-conductive backing plate，And conduct electricity the drop of injection on shower nozzle，Can after annular electro magnetic induction coil，It is dropped on electrically-conductive backing plate，In the side in injection droplet flight space, two vision inspection apparatus 2 are set，First look detecting device is for detecting the drippage process of injection drop，Second vision inspection apparatus is for detecting injection drop deposition results on electrically-conductive backing plate，And First look detecting device and the second vision inspection apparatus respectively with controller feedback link.
And existing electrohydrodynamics printing device itself has vision inspection apparatus, the control device of therefore above-mentioned control electrohydrodynamics print resolution can directly utilize existing vision inspection apparatus, namely from the vision inspection apparatus of electrohydrodynamics printing device to be, pick out holding wire connected with controller, real time detection signal can be realized and feed back to controller, it is achieved closed loop control.
Conduction shower nozzle 3 and electrically-conductive backing plate 6 are connected respectively to the positive and negative terminal of high-voltage pulse power source 7, under induction electric field action, print solution and flow out and formed jet or droplet jet to the electrically-conductive backing plate of motion by conduction shower nozzle, the toroidal magnetic field produced by annular electro magnetic induction coil in the flight range of jetting stream or drop, charged jet or drop are produced centripetal Lorentz force, limit injection drop spreads to surrounding, reduces the flight angle of drop.
Order of the present invention also provides for a kind of based on the control method being provided with the printing device controlling device controlling electrohydrodynamics print resolution, and it comprises the following steps:
One, print parameters is carried out pretreatment, including to the voltage of high-voltage pulse power source and frequency, conduction shower nozzle and the distance of electrically-conductive backing plate, annular electro magnetic induction coil the parameter such as electric current be adjusted, improve the resolution that electrohydrodynamics prints, in preprocessing process, print parameters both can method be adjusted by experiment, it would however also be possible to employ print parameters is adjusted by coupling of multiple physics software；
nullTwo、Printing equipment is controlled，Make to print solution to supply with certain flow，This printing equipment includes flow pump，Flow pump is carried out Stress control，The conducting solution such as polymer or metal nanoparticle solution is supplied with certain flow，The conduction shower nozzle that connects respectively at high-voltage pulse power source both positive and negative polarity and to electrically-conductive backing plate between apply the process data of the voltage of high-voltage pulse power source and the frequency parameter obtained in step one，Form induction electric field，Printing solution at conduction shower nozzle operative tip forms taylor cone，When the electric field force suffered by the solution of conduction shower nozzle part is more than solution surface tension，Print solution and form drop，Drop Jet with downward flow direction under the effect of induction electric field force，Flight range at injection drop，According to current parameters value to annular electro magnetic induction coil pretreatment in step one，Controller 1 is applied corresponding current value，The conduction drop of injection is subject to the centripetal Lorentz force effect that toroidal magnetic field produces，Under the constraint of centripetal Lorentz force，Conduction drop deposits on electrically-conductive backing plate，Form high-resolution print pattern.
Three, in electrohydrodynamics print procedure, the control device controlling electric current kinetics print resolution is carried out closed loop control, respectively the drippage process and electrically-conductive backing plate deposition results spraying drop is detected by vision inspection apparatus, according to testing result, the corresponding parameter that controls of controller is carried out self-adaptative adjustment, improves the resolution of electrohydrodynamics print pattern.
In injection drips process, due to the coaxial repulsion that drop self produces with like charges, each microgranule that can cause drop spreads to surrounding, changes the diameter of drop, thus affecting the resolution that electrohydrodynamics prints, and by arranging toroidal magnetic field, the size of current of annular electro magnetic induction coil is regulated so that annular electro magnetic induction coil produces centripetal Lorentz force, the coaxial repulsion of constraint drop self by controller, the diameter making drop will not become big, improves its print resolution.
And two vision inspection apparatus are set, drippage process and electrically-conductive backing plate deposition results to injection drop detect respectively, and the result of detection is fed back to controller so that controller can according to drop and drippage after fructufy time regulate annular electro magnetic induction coil size of current.
Embodiment is not construed as limitation of the present invention, but any spiritual improvements introduced based on the present invention, all should within protection scope of the present invention.
Claims (6)
1. one kind controls the electrohydrodynamics high-resolution control device of printing, it is characterized in that: it includes the field generator for magnetic for producing centripetal Lorentz force, the controller for adjusting centripetal Lorentz force size being connected with field generator for magnetic, described controller and two vision inspection apparatus connect, and described vision inspection apparatus, controller and field generator for magnetic constitute close loop control circuit.
2. a kind of control device controlling electrohydrodynamics print resolution according to claim 1, it is characterised in that: described field generator for magnetic is wrapped on annular core is constituted by least one annular electro magnetic induction coil.
3. a kind of control device controlling electrohydrodynamics print resolution according to claim 2, it is characterised in that: multiple annular core stackings are arranged, and are wound around annular electro magnetic induction coil on each annular core respectively.
null4. the printing device controlling device of the control electrohydrodynamics print resolution adopted described in the claims 1 or 2 or 3，It includes motion platform，Arrange on the moving platform in order to fixing carrying for the electrically-conductive backing plate as pattern printed substrates，Printing equipment is set electrically-conductive backing plate is fixed above，It has the conduction shower nozzle for printing solution，It is ejected on electrically-conductive backing plate to carry out pattern printing for printing solution，Described conduction shower nozzle is connected with flow pump，It is connected high-voltage pulse power source between conduction shower nozzle and electrically-conductive backing plate，It is characterized in that: the control device of above-mentioned control electrohydrodynamics print resolution is set between described conduction shower nozzle and electrically-conductive backing plate，The drop of described conduction shower nozzle injection is fallen on electrically-conductive backing plate through the field generator for magnetic of this electrohydrodynamics print control unit，In the side in injection droplet flight space, two vision inspection apparatus are set，First look detecting device prints the drippage process of solution for detecting，Second vision inspection apparatus is for detecting injection drop deposition results on electrically-conductive backing plate，And First look detecting device and the second vision inspection apparatus respectively with controller feedback link.
5. the control method for the printing device described in the claims 4, it is characterised in that: it comprises the following steps:
One, print parameters is carried out pretreatment, be adjusted including to the voltage of high-voltage pulse power source and the current parameters of frequency, conduction shower nozzle and the distance of electrically-conductive backing plate, field generator for magnetic；
Two, printing equipment is controlled,
(1) flow pump is controlled so that print solution and supply with certain flow,
(2) between conduction shower nozzle and electrically-conductive backing plate that high-voltage pulse power source both positive and negative polarity connects respectively, the voltage of the high-voltage pulse power source of acquisition in step one and the process data of frequency parameter are applied, form induction electric field, the printing solution making conduction shower nozzle top forms taylor cone
(3) electric field force suffered by solution at conduction shower nozzle place is regulated so that it is overcome solution surface tension so that print solution and form drop,
(4) drop Jet with downward flow direction under the effect of induction electric field force, flight range at injection drop, according to current value to field generator for magnetic pretreatment in step one, controller is applied corresponding current value, the conduction drop of injection is subject to the centripetal Lorentz force effect that field generator for magnetic produces, under the constraint of centripetal Lorentz force, conduction drop deposits on electrically-conductive backing plate, forms high-resolution print pattern；
Three, the flight course of injection drop and the deposition results of electrically-conductive backing plate are detected by two vision inspection apparatus respectively, and testing result is sent to controller, according to testing result, the corresponding parameter that controls controlling in device controlling electric current kinetics print resolution is adjusted by controller in real time, thus improving the resolution of electrohydrodynamics print pattern.
6. control method according to claim 5, it is characterised in that: in step one, print parameters is carried out pretreatment by method or coupling of multiple physics software by experiment.
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| CN201610138217.8A CN105772722B (en) | 2016-03-11 | 2016-03-11 | A kind of control device and apparatus and method for of control electric current body dynamics print resolution |
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Cited By (19)
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| CN106183446A (en) * | 2016-08-23 | 2016-12-07 | 嘉兴学院 | The electrohydrodynamics printing device of a kind of curved substrate and control method thereof |
| CN106371317A (en) * | 2016-11-02 | 2017-02-01 | 嘉兴学院 | Fully-closed-loop real-time adaptive control method of direct-writing process of electro-hydro dynamics |
| CN106443219A (en) * | 2016-12-08 | 2017-02-22 | 东华理工大学 | Device for detecting charge capacity of electrostatic atomized liquid droplet |
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| KR20220100515A (en) * | 2021-01-08 | 2022-07-15 | 한밭대학교 산학협력단 | Nano 3D printer device for manufacturing nano structure |
| CN114904674A (en) * | 2022-05-30 | 2022-08-16 | 华中科技大学 | Magnetic field auxiliary robot collaborative multi-nozzle electrospray curved surface coating device |
| CN115365516A (en) * | 2022-07-15 | 2022-11-22 | 华中科技大学 | Fixed-point powder feeding device, selective laser melting forming equipment and selective laser melting forming method |
| US11554414B2 (en) * | 2019-07-03 | 2023-01-17 | Shanghai University | Laser-solid-forming manufacturing device and method |
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