CN116985539A - Multifunctional flexible electronic printing equipment - Google Patents
Multifunctional flexible electronic printing equipment Download PDFInfo
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- CN116985539A CN116985539A CN202310934575.XA CN202310934575A CN116985539A CN 116985539 A CN116985539 A CN 116985539A CN 202310934575 A CN202310934575 A CN 202310934575A CN 116985539 A CN116985539 A CN 116985539A
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- 239000000463 material Substances 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
- B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
- B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
- B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
- B41J11/00216—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using infrared [IR] radiation or microwaves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0085—Using suction for maintaining printing material flat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
- B41J3/543—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements with multiple inkjet print heads
Abstract
The invention provides a multifunctional flexible electronic printing device, comprising: the device comprises a shell, a base, a working platform, a spray head moisturizing device, an X-axis closed-loop motion system, a Y-axis closed-loop motion system, a Z-axis motion system, a double spray head system, a power-adjustable ultraviolet curing module, a power-adjustable infrared/photon sintering curing module, a waste ink receiving box and a double spray head rapid calibration device. The infrared/photon sintering curing module with adjustable power and the ultraviolet curing module with adjustable power are respectively arranged on two sides of the double-nozzle system, so that the multifunctional flexible electronic product can be used for ink-jet photo-curing and thermal-curing printing of functional electronic materials and supporting materials thereof, and integrated manufacturing of the multifunctional flexible electronic product is realized. The double-nozzle quick calibration device can realize quick calibration of the spatial position of the nozzle, and solves the problems of poor preparation precision, poor accuracy and the like of the flexible electronic product with the multilayer structure. The invention provides effective technical support for preparing the high-precision tip of the flexible electronic product with the multifunctional and multilayer structure.
Description
Technical Field
The invention relates to the technical field of ink-jet printing, in particular to a multifunctional flexible electronic printing device.
Background
The multi-disciplinary cross characteristic of the flexible electronic enables the technology and the product to integrate a plurality of disciplinary knowledge and skills such as materials, machinery, electronics, medicine and the like, and the product developed by adopting the flexible electronic technology relates to a plurality of application fields such as new energy, electronics, medicine and the like. For example, flexible display technology and products have been applied to products in various fields such as smart phones, tablet computers, high definition displays, etc., and the future industrial scale can reach trillion.
However, the physical and chemical properties of the flexible electronic product are limited by the stretchable and bendable substrate and are influenced by the multi-layer structural material, the preparation process and the technology thereof. Taking a typical flexible perovskite solar cell as an example, it comprises a light-transmitting substrate, a hole transport layer, a photoactive layer, an electron transport layer, and a conductive layer. When different functional layers are prepared, each layer needs to be printed, sintered and cured after treatment, so that the next layer can be printed continuously. Meanwhile, when the traditional flexible electronic product with the multilayer structure is prepared, the material layer prepared in the previous stage can be prepared in the next stage through special heat treatment or curing treatment, so that the time is long, the performance of the flexible electronic product is directly influenced by the accurate alignment of the multilayer structure, and the laboratory technology cannot be rapidly applied to the market. In addition, the nozzle of the inkjet printing device used in the current market has high adjustment requirement and single connection structure, adopts a mode of screwing the nozzle with the bottom plate, is full based on experience when in use, has poor alignment precision and consumes time, and is not beneficial to popularization and use in the market.
Disclosure of Invention
In order to overcome the defects of the prior art, the multifunctional flexible electronic printing equipment solves the problems that the traditional ink-jet printer cannot print and solidify material inks of various systems, cannot rapidly prepare a multifunctional and multi-layer structure flexible electronic device, and the multi-layer structure printing is accurately aligned, can realize the integrated manufacturing of the multifunctional flexible electronic product and the rapid calibration of the space position of a spray head, and provides effective technical support for the preparation of high-precision tips of the multifunctional and multi-layer structure flexible electronic product.
The technical scheme adopted by the invention is as follows: the multifunctional flexible electronic printing equipment structurally comprises a shell 1, a base 2, a working platform 3, a spray head moisturizing device 4, an X-axis closed-loop motion system 5, a Y-axis closed-loop motion system 6, a Z-axis motion system 7, a double spray head system 8, a power-adjustable ultraviolet curing module 9, a power-adjustable infrared/photon sintering curing module 10, a waste ink receiving box 11 and a double spray head rapid calibration device 12.
The two sides of the double-nozzle system 8 are respectively provided with an infrared/photon sintering curing module 10 with adjustable power and an ultraviolet curing module 9 with adjustable power, which can be used for inkjet photo-curing and thermal-curing printing of functional electronic materials and supporting materials thereof, thereby realizing the integrated manufacture of multifunctional flexible electronic products.
The dual-nozzle quick calibration device 12 can fix two nozzles on a hard structural bottom plate respectively, and fix and quickly calibrate the nozzles by using a mode of clamping set screws with a Boeing screw.
The wave screw comprises a first wave screw 1211 and a second wave screw 1212, the first wave screw 1211 is positioned at the left side of the upper part of the spray head, the second wave screw 1212 is positioned above the upper part of the spray head and is centered and vertically arranged with the first wave screw 1211; the set screws include a first set screw 1221, a second set screw 1222, and a third set screw 1223; the first set screw 1221 is positioned on the right side of the upper part of the spray head, is installed in a mirror image with the first wave screw 1211 and is installed perpendicular to the second wave screw 1212; the second set screw 1222 is positioned on the right side of the lower part of the spray head, and is installed in parallel with the first set screw 1221; the third set screw 1223 is positioned on the left side of the lower part of the showerhead, mounted perpendicular to the second set screw 1222, and mounted parallel to the second wave screw 1212.
The dual-nozzle quick calibration device 12 can adjust the positions of the X direction, the Y direction and the theta angle by adopting the modes of wave screw positioning and set screw adjustment, can realize quick calibration of the spatial position of the nozzle, and solves the problems of poor preparation precision, poor accuracy and the like of the flexible electronic product with the multilayer structure.
The base 2 is a steel structure module so as to realize accurate alignment and stable working state in the motion process of the double-spray head system 8 and the working table.
The effective printing format of the working platform 3 is 900mm by 600mm. The working table surface adopts a multi-region combined vacuum adsorption platform, and precise negative pressure adsorption holes are densely distributed. The design can switch different adsorption areas according to the use requirement, and meets the manufacturing requirements of flexible electronic products with different sizes. Meanwhile, negative pressure adsorption prevents the sample from moving or warping in the solidification and sintering process.
The dual spray system 8 is two sets of spray heads and ink path systems which are independently controlled. The two spray heads use two completely independent systems, and the two devices from the ink path to the spray heads to the cleaning unit are all completely independent, so that two sets of inks with different systems can be printed, and the use of equipment is not affected even if the two inks are mixed for reaction. The main body of the spray head moisturizing device 4 is two independent ink stacks, and the two spray heads correspond to each other. A typical functional inkjet printer can only print one ink, even if there is a device for printing two inks, because the ink path system or the cleaning unit is a common system, this can result in the two inks not being mixed and then reacting, or the system of the inks being substantially identical for use.
The spray head is a piezoelectric spray head, and can be heated, and the temperature range is from room temperature to 60 ℃. The individual nozzle diameters of piezojets are generally in the range of 9-52. The piezojet is preferably a photo-alignment jet or a Sier XAAR jet. Preferably, the light-regulating G5 nozzle is a gray-scale piezoelectric nozzle, the material is all-steel, the variable ink drops are printed with 7pl-35pl, and the printing width is as follows: 54.1mm (2.1 inches), number of nozzles: 1280 (4×320 channels), injection frequency: gray mode 20kHz, nozzle spacing in the same series: 1/150 inch (0.1693 mm)/column, nozzle spacing (row-to-row distance) of 0.55mm, nozzle spacing (scan up-down distance) of 11.81mm, operating temperature: the room temperature is up to 60 ℃, a heater and a temperature controller are arranged in the room temperature, and the service life is prolonged: 300 hundred million times of spray heads discharge ink.
Preferably, the XAAR-128 nozzle is about 200-300dpi and the nozzle of the nozzle is 85pl. The XAAR-128 nozzle is between 28 and 34V.
The apparatus and process of the present invention is suitable for use with piezo jets, low viscosity inks (viscosity within 40 cp), and the ink itself is non-conductive. For example, nano silver conductive ink is not conductive per se, and is conductive after sintering at a certain temperature range (120-150 ℃).
Piezojets, also known as "film jets", are sensors that are composed of a layer of piezoceramic film. The membrane is composed of tiny particles of piezoelectric material that are capable of undergoing tiny deformation under the influence of an electric field, thereby causing a pressure change. When a voltage is applied to the piezoelectric material of the piezojet, an electric field is generated. Under the action of the electric field, the piezoelectric material particles deform, so that a tiny expansion or contraction is generated in the piezoelectric ceramic film. This tiny deformation pushes the liquid loaded on the ceramic membrane out of the orifice forming a droplet. Because of the high frequency response of the piezoelectric film, the nozzle can rapidly eject a series of tiny droplets.
The high frequency response characteristics of the piezojet enable it to control the ejection and stopping of the jet in the microsecond range, suitable for high speed droplet ejection. The piezoelectric spray head can realize the spraying and control of tiny liquid drops, and has high precision and accuracy.
The piezoelectric spray head of the invention can not be replaced by a thermal foaming spray head, and the principle and the functional structure of the device are not matched. The thermal foaming nozzle jet ink is realized by heating the nozzle, namely, the thin film resistor is utilized to rapidly heat the ink to more than 300 ℃ in the ink ejection area, so that countless tiny bubbles are formed, the bubbles are gathered into large bubbles at extremely high speed and spread, and the ink drops are forced to be ejected from the nozzle. After the bubble continues to grow for several microseconds again, it disappears back onto the resistor, and the ink of the nozzle also retracts as the bubble disappears. Then, the suction force generated by the surface tension of the ink pulls new ink to be replenished to the ink ejection area for the next cyclic jet printing, and the ink output cannot be accurately controlled, so that the ink output is large. The thermal foaming type spray head works under the conditions of high temperature and high pressure for a long time, so that the spray nozzle is severely corroded, ink drops are easy to splash, the spray nozzle is blocked, and the like, so that the thermal foaming type spray head has a short service life.
Because the equipment of the invention adopts the piezoelectric spray head, powder materials such as metal powder, slurry and gel/hydrogel materials cannot be printed. Since the piezoelectric nozzle needs to apply voltage when in operation, the liquid metal or other material which is conductive per se cannot be printed, and electrical faults such as short/open circuit and the like can occur in the device.
Because the equipment of the invention adopts the piezoelectric spray head, and does not have the function of 'fused deposition', hot-melt materials (such as ABS resin, nylon, wax, PC, PLA and other filiform materials) cannot be printed.
Because the piezoelectric spray nozzle selected by the equipment does not need an air pump or a mechanical pump to operate, the energy consumption of the equipment is very low, and the piezoelectric spray nozzle is safer because the piezoelectric spray nozzle does not have moving parts and high-pressure gas, so the piezoelectric spray nozzle cannot be replaced by a 3D printing nozzle, and the equipment also does not have the hardware structure and the function of extrusion modes such as corresponding screw extrusion, gear extrusion and the like.
The power-adjustable infrared/photon sintering and curing module 10 and the power-adjustable ultraviolet curing module 9 are respectively arranged on two sides of the double-nozzle system 8. The module can enable the device of the invention to print more ink of a material system, and realize alternate printing and real-time solidification of multiple inks.
The ultraviolet curing module 9 is provided with a controller for adjusting the power, and the adjustable power range is 500-20000mW cm -2 . The wavelength of the ultraviolet lamp used in the ultraviolet curing module 9 is 365nm or 395nm, and the power of ultraviolet curing has the most direct influence on the ultraviolet curing effect. In unit time, the peak illumination of the ultraviolet LED is too large, so that the molecular structure in the ultraviolet LED glue or ink can be damaged; the peak illuminance of the ultraviolet LED is too small, and there is insufficient photon energy to induce molecular chains in the ultraviolet glue or ink, so that ultraviolet curing cannot be completed. Therefore, only the proper peak illumination of the ultraviolet LED can finish the preset ultraviolet curing effect while opening the molecular chain. The ultraviolet curing module 9 is used for curing ultraviolet ink in real time.
The infrared light wavelength used in the power-tunable infrared curing module is 780-1400nm, preferably 850 or 940nm. The infrared/photon sintering curing module 10 has an adjustable power range of 0-3500W.
The infrared/photon sintering and curing module 10 is used for heating and curing functional electronic materials such as weak solvent ink, aqueous ink or conductive ink in real time. The weak solvent ink, the aqueous ink and the printing electronic ink can be dried by a drying process after being printed. The commercial inkjet printing equipment generally adopts a mode of printing before processing, and the efficiency is lower, so that the overall speed of the mode of inkjet printing is lower, and the printed matter cannot be dried in a short time. The instantaneous power is applied dynamically to the entire sample, not just the surface, using infrared heat treatment techniques. The adjustable setting parameters of the adopted infrared/photon sintering and curing module 10 comprise: the energy of the integrated infrared/photon sintering and curing module 10 can be independently regulated and controlled, the heights of the infrared/photon sintering lamp tube and the sample platform can be regulated and controlled, the curing process can be programmed, the sintering and curing times can be set, and the like; the infrared/photon sintering baking temperature range is within 300 ℃, and the integrated cooling system is matched. The method is particularly suitable for drying and sintering weak solvent ink, water-based ink or conductive ink, and drying and sintering other functional inks. The infrared/photon sintering curing module 10 can also realize functions of flexible printed electronic circuits, semiconductor film forming annealing curing, ultrafast surface cleaning and drying.
The conductive ink is preferably nano silver conductive ink, wherein nano silver is granular, preferably spherical particles, and the average particle size is 10-200nm. The physical and chemical properties such as viscosity of the nano silver conductive ink meet the basic requirements of ink-jet printing, and preferably have the following properties: the dynamic viscosity at 25 ℃ is 5-20cp, the surface tension is 25-35 mN.m < -1 >, and the solid content is 30-50wt.%.
The flexible substrate used for printing may be one of PET, PI, PEN films.
The invention is equipped with an XYZ three-axis system, a steel structure module is used as a base 2, an X axis adopts a synchronous belt, a linear guide rail and a grating ruler, a Y axis adopts a stepping motor, a linear guide rail and a ball screw and grating ruler, and a Z axis adopts a stepping motor, a linear guide rail and a ball screw as a power system of the whole equipment. The whole system of X axis and Y axis adopts the mode of increasing grating ruler to introduce closed-loop control system, compares in traditional open-loop control mode, systematically has improved the accurate control mode of equipment, guarantees that the positioning accuracy of each axle can reach very high precision grade.
The multifunctional flexible electronic printing equipment can be used for rapidly preparing large-format multifunctional and multi-structure flexible electronic products, and can be used for application requirements in the fields of display, new energy products, wearable electronics and the like.
The beneficial effects of the invention are as follows: the multifunctional flexible electronic printing equipment solves the problems that the traditional ink-jet printer cannot print and solidify material ink of various systems, cannot rapidly prepare a multifunctional and multi-layer structure flexible electronic device, and the multi-layer structure printing is accurately aligned, can realize the integrated manufacture of the multifunctional flexible electronic product and the rapid calibration of the space position of a spray head, and provides effective technical guarantee for the high-precision preparation of the multifunctional and multi-layer structure flexible electronic product.
The device of the invention is provided with the infrared/photon sintering curing module 10 with adjustable power and the ultraviolet curing module 9 with adjustable power at the two sides of the spray head respectively, and the two modules can print more system inks and realize online curing at the same time of printing. The double-nozzle quick calibration device 12 of the equipment adopts a mode of combining a wave screw and a set screw, fixes two nozzles on a hard structure base plate, and uses the wave screw for positioning and the set screw for adjustment, so that the calibration device can finely and quickly adjust the positions of X direction, Y direction and theta angle. The dual-nozzle quick calibration device 12 of the device can realize quick and accurate adjustment of the spatial position of the nozzle so as to solve the problem that accurate alignment and calibration are required for printing different inks.
Drawings
Fig. 1 is a perspective view of a multifunctional flexible electronic printing apparatus provided in the present embodiment;
fig. 2 is an enlarged schematic diagram of the positional relationship of the ultraviolet curing module 9, the dual-nozzle rapid calibration device 12, and the infrared/photon sintering curing module 10 of the multifunctional flexible electronic printing apparatus according to the present embodiment;
fig. 3 is a schematic cross-sectional view of the ultraviolet curing module 9 of the multifunctional flexible electronic printing apparatus according to the present embodiment;
fig. 4 is a schematic cross-sectional view of an ir/photon sintering and curing module 10 of the multifunctional flexible electronic printing device according to the present embodiment;
fig. 5 is a schematic structural diagram of a dual-nozzle rapid calibration device 12 of the multifunctional flexible electronic printing apparatus according to the present embodiment;
fig. 6 is a diagram showing the positional relationship between a wave screw and a set screw of the multifunctional flexible electronic printing apparatus according to the present embodiment;
FIG. 7 is a schematic diagram of the multifunctional flexible electronic printing apparatus according to the present embodiment, wherein the first set screw 1221 and the second set screw 1222 are adjusted simultaneously;
FIG. 8 is a schematic view of a single adjustment third set screw 1223 of the multi-function flexible electronic printing apparatus provided by this embodiment;
FIG. 9 is a schematic diagram of a single adjustment second set screw 1222 of a multi-function flexible electronic printing apparatus provided by the present embodiment;
the attached drawings are identified: 1-shell, 2-base, 3-working platform, 4-spray head moisturizing device, 5-X axis closed loop motion system, 6-Y axis closed loop motion system, 7-Z axis motion system, 8-double spray head system, 9-ultraviolet curing module, 10-infrared/photon sintering curing module, 11-waste ink receiving box, 12-double spray head rapid calibrating device, 1211-first wave screw, 1212-second wave screw, 1221-first set screw, 1222-second set screw, 1223-third set screw.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a perspective view of a multifunctional flexible electronic printing device according to the present embodiment, where the multifunctional flexible electronic printing device provided by the present invention includes: the device comprises a shell 1, a base 2, a working platform 3, a spray head moisturizing device 4, an X-axis closed-loop motion system 5, a Y-axis closed-loop motion system 6, a Z-axis motion system 7, a double spray head system 8, a power-adjustable ultraviolet curing module 9, a power-adjustable infrared/photon sintering curing module 10, a waste ink receiving box 11 and a double spray head rapid calibration device 12.
The two sides of the double-nozzle system 8 are respectively provided with an infrared/photon sintering curing module 10 with adjustable power and an ultraviolet curing module 9 with adjustable power, which can be used for inkjet photo-curing and thermal-curing printing of functional electronic materials and supporting materials thereof, thereby realizing the integrated manufacture of multifunctional flexible electronic products. The dual-nozzle quick calibration device 12 can fix two nozzles on a hard structural bottom plate respectively, and fix and quickly calibrate the nozzles by using a mode of combining a wave screw with a set screw.
The wave screws comprise a first wave screw 1211 and a second wave screw 1212, the first wave screw 1211 is positioned at the left side of the upper part of the spray head, the second wave screw 1212 is positioned above the upper part of the spray head, and the second wave screw 1212 is arranged vertically to the first wave screw 1211; the set screws include a first set screw 1221, a second set screw 1222, and a third set screw 1223; the first set screw 1221 is positioned on the right side of the upper part of the spray head, is installed in a mirror image with the first wave screw 1211 and is installed perpendicular to the second wave screw 1212; the second set screw 1222 is positioned on the right side of the lower part of the spray head, and is installed in parallel with the first set screw 1221; the third set screw 1223 is positioned on the left side of the lower part of the showerhead, mounted perpendicular to the second set screw 1222, and mounted parallel to the second wave screw 1212. The dual-nozzle quick calibration device 12 can adjust the positions of the X direction, the Y direction and the theta angle by adopting the modes of wave screw positioning and set screw adjustment, can realize quick calibration of the spatial position of the nozzle, and solves the problems of poor preparation precision, poor accuracy and the like of the flexible electronic product with the multilayer structure.
The base 2 is a steel structure module to realize accurate alignment and stable working state in the motion process of the double-spray head system 8 and the working table.
The effective print format of the work platform 3 is 900mm by 600mm. The working table surface adopts a multi-region combined vacuum adsorption platform, and precise negative pressure adsorption holes are densely distributed. The design can switch different adsorption areas according to the use requirement, and meets the manufacturing requirements of flexible electronic products with different sizes. Meanwhile, negative pressure adsorption prevents the sample from moving or warping in the solidification and sintering process.
The dual-nozzle system 8 is a two-set independently controlled nozzle and ink path system. The two spray heads use two completely independent systems, and the two devices from the ink path to the spray heads to the cleaning unit are all completely independent, so that two sets of inks with different systems can be printed, and the use of equipment is not affected even if the two inks are mixed for reaction. The main body of the spray head moisturizing device 4 is two independent ink stacks, and the two spray heads correspond to each other. A typical functional inkjet printer can only print one ink, even if there is a device for printing two inks, because the ink path system or the cleaning unit is a common system, this can result in the two inks not being mixed and then reacting, or the system of the inks being substantially identical for use.
Fig. 2 is an enlarged schematic diagram of the positional relationship among the ultraviolet curing module 9, the dual-nozzle rapid calibration device 12, and the infrared/photon sintering curing module 10 of the multifunctional flexible electronic printing apparatus according to the present embodiment. The two sides of the double-nozzle system 8 are respectively provided with the infrared/photon sintering curing module 10 with adjustable power and the ultraviolet curing module 9 with adjustable power, and the two modules can enable the device to print more system inks and realize online curing at the same time of printing. The two modules can realize printing of ultraviolet ink and weak solvent ink on one device, and solve the problem that one device cannot print two inks at the same time.
Fig. 3 is a schematic cross-sectional view of the ultraviolet curing module 9 of the multifunctional flexible electronic printing apparatus according to the present embodiment. The ultraviolet curing module 9 is provided with a controller for adjusting the power, and the adjustable power range is 500-20000mW cm -2 . The wavelength of the ultraviolet lamp used in the ultraviolet curing module 9 is 365nm or 395nm, and the power of ultraviolet curing has the most direct influence on the ultraviolet curing effect and is the most important index. In unit time, the peak illumination of the ultraviolet LED is too large, so that the molecular structure in the ultraviolet LED glue or ink can be damaged; the peak illuminance of the ultraviolet LED is too small, and there is insufficient photon energy to induce molecular chains in the ultraviolet glue or ink, so that ultraviolet curing cannot be completed. Therefore, only the proper peak illumination of the ultraviolet LED can finish the preset ultraviolet curing effect while opening the molecular chain.
The ultraviolet curing module 9 is used for curing ultraviolet ink in real time. The ultraviolet curing module 9 of the embodiment can effectively cure ultraviolet system ink, and cure the ink on the substrate during printing, thereby improving the printing efficiency and increasing the selection range of ink materials.
Fig. 4 is a schematic cross-sectional view of an infrared/photon sintering and curing module 10 of the multifunctional flexible electronic printing device according to the present embodiment. The infrared/photon sintering curing module 10 is equipped with a controller for adjusting power, with an adjustable power range of 0-3500W. The infrared/photon sintering and curing module 10 is used for heating and curing functional electronic materials such as weak solvent ink, aqueous ink or conductive ink in real time. The weak solvent ink, the aqueous ink and the printing electronic ink can be dried by a drying process after being printed. The commercial inkjet printing equipment generally adopts a mode of printing before processing, and the efficiency is lower, so that the overall speed of the mode of inkjet printing is lower, and the printed matter cannot be dried in a short time. The common printer is used for curing the ink, the printed finished product is required to be placed in an oven for curing, so that the curing is long in time consumption, the secondary positioning is troublesome, the guiding ruler is required to be found before the secondary positioning is carried out, the guiding ruler is required to be placed in the original position after the baking is finished, the substrate after the baking is required to be not deformed, and otherwise, the secondary positioning cannot be finished.
The infrared light wavelength used in the power-tunable infrared curing module is 780-1400nm, preferably 850 or 940nm. The instantaneous power is applied dynamically to the entire sample, not just the surface, using infrared heat treatment techniques. The adjustable setting parameters of the adopted infrared/photon sintering and curing module 10 comprise: the energy of the integrated infrared/photon sintering and curing module 10 can be independently regulated and controlled, the heights of the infrared/photon sintering lamp tube and the sample platform can be regulated and controlled, the curing process can be programmed, the sintering and curing times can be set, and the like; the infrared/photon sintering baking temperature range is within 300 ℃, and the integrated cooling system is matched. The method is particularly suitable for drying and sintering weak solvent ink, water-based ink or conductive ink, and drying and sintering other functional inks. The infrared/photon sintering curing module 10 can also realize functions of flexible printed electronic circuits, semiconductor film forming annealing curing, ultrafast surface cleaning and drying.
The module can enable the device of the invention to print more ink of a material system, realize alternate printing and real-time solidification of multiple inks, and greatly improve the efficiency of printing, drying/sintering solidification.
The flexible substrate used for printing may be one of PET, PI, PEN films.
The spray heads in the double spray head system 8 are piezoelectric spray head light-regulating G5 spray heads. One of the spray heads prints ultraviolet curing ink, the dynamic viscosity at 25 ℃ is 24cp, the surface Zhang Liwei mN.m < -1 >, the heating temperature of the spray head is 31 ℃, and the power of the ultraviolet curing module is 13000 mW.cm < -2 >. The other nozzle prints nano silver conductive ink, wherein the nano silver is spherical particles, the average particle diameter is 50nm, the dynamic viscosity of the nano silver conductive ink at 25 ℃ is 10cp, the surface Zhang Liwei mN.m < -1 >, the solid content is 35wt.%, the infrared light wavelength used in the infrared curing module is 1100nm, and the power is 3100W. The printed ultraviolet light curing ink can be used as a supporting substrate and an insulating layer, the printed nano silver conductive ink is used as a circuit, and the printed nano silver conductive ink can be used for manufacturing a multilayer structure by collaborative printing.
In another embodiment, the light management G5 spray head may be replaced with a XAAR-128 spray head.
In another embodiment, the light management G5 spray head may be replaced with a light management G6 spray head.
Fig. 5 is a schematic structural diagram of a dual-nozzle rapid calibration device 12 of a multifunctional flexible electronic printing apparatus according to the present embodiment. The dual spray rapid calibration device 12 calibration process is as follows: firstly, two spray heads respectively print out standard calibration patterns, and the two groups of standard calibration patterns are used for judging whether the relative positions of the two spray heads deviate or not, and if the relative positions deviate, adjustment is needed. The dual-nozzle quick calibration device 12 of the equipment of the invention respectively fixes two nozzles on the bottom plate of the aluminum structure in a mode of combining the wave screw with the fastening screw. Fig. 6 is a diagram showing the positional relationship between a wave screw and a set screw of the multifunctional flexible electronic printing apparatus according to the present embodiment.
The two spray heads are fixed on the aluminum structural bottom plate by the wave screw and the set screw, and the wave screw is used as a component capable of providing pressure and accurately positioning and is mainly locked by threads. The screw thread has two locking modes of a straight groove and an inner hexagon, and the pressed-in shell 1 is made of two types of stainless steel and carbon steel. The screw body is long, short and standard, so as to adapt to pressure and fix the body. Springs are classified into light load and heavy load. The ball screw pushes the ball to move by means of a spring with certain pressure, so that the spray head mounting bottom plate is initially positioned.
The dual spray rapid calibration device 12 of the present embodiment has a structure capable of finely and rapidly adjusting the positions of the X direction, the Y direction, and the θ angle.
Fig. 7 is a schematic diagram of the multifunctional flexible electronic printing apparatus according to the present embodiment, in which the first set screw 1221 and the second set screw 1222 are adjusted simultaneously. Adjustment is made using set screws, as shown in fig. 7, while adjusting both the first set screw 1221 and the second set screw 1222, when rotated clockwise, the spray head and its mounting base plate move to the left; and meanwhile, when the spray head and the mounting bottom plate thereof rotate anticlockwise, the spray head moves rightwards, so that the adjustment of the left-right movement of the spray head is completed.
Fig. 8 is a schematic diagram of a single adjustment third set screw 1223 of the multifunctional flexible electronic printing device according to the present embodiment. As shown in fig. 8, when the third set screw 1223 is adjusted, the spray head and its mounting base plate move forward when rotated clockwise, and the spray head and its mounting base plate move backward when rotated counterclockwise, thereby completing the adjustment of the forward and backward movement of the spray head.
Fig. 9 is a schematic diagram of a single adjustment second set screw 1222 of the multi-function flexible electronic printing apparatus provided in this embodiment. As shown in fig. 9, when the second set screw 1222 is independently adjusted, the spray head and its mounting base plate form an angle of θ ° with the home position when rotated clockwise, and form an angle of- θ ° with the home position when rotated counterclockwise, thus completing the angular adjustment of the spray head.
The multifunctional flexible electronic printing device of the embodiment is provided with an XYZ three-axis system, a steel structure module is used as a base 2, an X axis adopts a synchronous belt, a linear guide rail and a grating ruler mode, a Y axis adopts a stepping motor, a linear guide rail and a ball screw and grating ruler mode, and a Z axis adopts a stepping motor, a linear guide rail and a ball screw mode as a power system of the whole device. The Z-axis movement system 7 drives the spray head to move up and down, the X-axis movement system drives the Z-axis movement system 7 and the spray head to move left and right, and the Y-axis movement system drives the working platform 3 to move back and forth. The whole system of X axis and Y axis adopts the mode of increasing grating ruler to introduce closed-loop control system, compares in traditional open-loop control mode, systematically has improved the accurate control mode of equipment, guarantees that the positioning accuracy of each axle can reach very high precision grade.
The multifunctional flexible electronic printing equipment can be used for rapidly preparing large-format multifunctional and multi-structure flexible electronic products, and can be used for application requirements in the fields of display, new energy products, wearable electronics and the like.
Claims (10)
1. A multi-functional flexible electronic printing device, characterized in that: the equipment structure comprises a shell, a base, a working platform, a spray head moisturizing device, an X-axis closed-loop motion system, a Y-axis closed-loop motion system, a Z-axis motion system, a double spray head system, a power-adjustable ultraviolet curing module, a power-adjustable infrared/photon sintering curing module, a waste ink receiving box and a double spray head rapid calibrating device.
2. The multi-function flexible electronic printing apparatus according to claim 1, wherein: the infrared/photon sintering curing module with adjustable power and the ultraviolet curing module with adjustable power are respectively arranged on two sides of the double-nozzle system, and can be used for ink-jet photo-curing and thermal-curing printing of functional electronic materials and supporting materials thereof, thereby realizing the integrated manufacturing of multifunctional flexible electronic products.
3. The multi-function flexible electronic printing apparatus according to claim 1, wherein: according to the double-nozzle quick calibration device, two nozzles can be respectively fixed on a hard structural bottom plate, and the nozzles can be fixed and quickly calibrated in a mode of using a wave screw to fasten a set screw combination;
the first wave screw is positioned on the left side of the upper part of the spray head, and the second wave screw is positioned above the upper part of the spray head and is arranged vertically to the first wave screw; the set screws comprise a first set screw, a second set screw and a third set screw; the first set screw is positioned on the right side of the upper part of the spray head, is installed in a mirror image with the first wave screw and is installed in a vertical direction with the second wave screw; the second set screw is positioned on the right side of the lower part of the spray head and is installed in parallel with the first set screw; the third set screw is positioned on the left side below the lower part of the spray head, is vertically arranged with the second set screw and is arranged in parallel with the second wave screw;
the double-nozzle quick calibration device adopts a mode of wave screw positioning and set screw adjustment to adjust the positions of the X direction, the Y direction and the theta angle, can realize quick calibration of the spatial position of the nozzle, and solves the problems of poor preparation precision and accuracy of the multilayer structure flexible electronic product.
4. The multi-function flexible electronic printing apparatus according to claim 1, wherein: the base is a steel structure module so as to realize accurate alignment and stable working state in the motion process of the double-spray head system and the working table.
5. The multi-function flexible electronic printing apparatus according to claim 1, wherein: the effective printing breadth of the working platform is 900mm 600mm, the working platform surface adopts a vacuum adsorption platform with a plurality of areas combined, different adsorption areas can be switched on and off according to the use requirement, and the manufacturing requirements of flexible electronic products with different sizes are met.
6. The multi-function flexible electronic printing apparatus according to claim 1, wherein: the double-nozzle system is composed of two sets of independently controlled nozzles and an ink path system, wherein the nozzles are piezoelectric nozzles, the nozzles can be heated, and the temperature range is between room temperature and 60 ℃.
7. The method according to claim 1Multifunctional flexible electronic printing equipment, its characterized in that: the adjustable power range of the ultraviolet curing module is 500-20000mW cm -2 The infrared light wavelength used in the infrared curing module with adjustable power is 780-1400nm, and the adjustable power range of the infrared/photon sintering curing module is 0-3500W.
8. The multi-function flexible electronic printing apparatus according to claim 1, wherein: the ultraviolet curing module is used for curing ultraviolet ink in real time, and the infrared/photon sintering curing module is used for heating and curing weak solvent ink, water-based ink or conductive ink in real time.
9. The multi-function flexible electronic printing apparatus according to claim 1, wherein: the X-axis closed-loop motion system comprises a synchronous belt, a linear guide rail and a grating ruler, the Y-axis closed-loop motion system comprises a stepping motor, a linear guide rail, a ball screw and a grating ruler, and the Z-axis motion system comprises a stepping motor, a linear guide rail and a ball screw.
10. The multi-function flexible electronic printing apparatus according to claim 1, wherein: the device can be used for rapidly preparing large-format multifunctional multi-structure flexible electronic products, and can be used for displaying, new energy products and application requirements in the field of wearable electronics.
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| CN202310934575.XA CN116985539A (en) | 2023-07-27 | 2023-07-27 | Multifunctional flexible electronic printing equipment |
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| CN202310934575.XA CN116985539A (en) | 2023-07-27 | 2023-07-27 | Multifunctional flexible electronic printing equipment |
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