PDLC silver paste coating equipment

Abstract

The invention relates to PDLC (polymer dispersed liquid crystal) silver paste coating equipment. The PDLC silver paste coating equipment comprises a rack and a motion platform assembly mounted on the rack, the moving platform assembly comprises an adsorption platform installed on the inner side of the rack, front-back moving modules are installed on the portions, on the left side and the right side of the adsorption platform, of the rack, the front-back moving modules drive two portal frames above to move in the front-back direction, and left-right moving modules installed on the portal frames drive lifting modules to move in the left-right direction. The lifting module drives the silver paste coating assembly to move up and down. Through the double-gantry structure, the structure is compact, the occupied area of equipment is small, the machining size is large, the two gantries are matched with each other for simultaneous machining, and the machining efficiency can be greatly improved. The method is compatible with pattern processing of various tracks, the cost is low, and the procedure of regularly cleaning the screen printing plate is not needed.

Description

Technical Field

[0001] The present invention relates to the technical field related to silver paste coating processing, and in particular to a PDLC silver paste coating device. Background Art

[0002] Polymer-dispersed liquid crystal (PDLC) is an emerging optoelectronic thin-film material. Due to the optical and dielectric anisotropy of liquid crystal molecules, PDLC is a composite material with electro-optical response properties. It has a wide range of applications in architectural glass, automotive sunroofs, electronic displays, and other fields. Its core structure typically consists of two transparent conductive layers (such as ITO or silver paste coating) with a PDLC functional layer in between.

[0003] Silver paste is the preferred choice for PDLC electrode production due to its high conductivity, low cost, and good adhesion. The silver paste coating process can significantly enhance the electrode's conductivity, improve production efficiency, and reduce material waste. While this process offers significant advantages over screen printing, existing screen printing still faces the following technical bottlenecks:

[0004] 1. Printing accuracy is not high:

[0005] Traditional screen printing equipment uses a segmented splicing method, which results in gaps where the joints are either separated or overlapped, causing uneven conductivity and affecting dimming response speed and optical consistency. Furthermore, due to the elasticity and deformation of the screen, misregistration is prone to occur during the printing process, making precision difficult to control.

[0006] 2. Low printing efficiency:

[0007] Traditional screen printing is a complex process, requiring the production of a screen, including a series of steps such as screen selection, stretching, and exposure. Each time the printing path is changed, the screen must be readjusted, wasting considerable time. Furthermore, the screen requires regular cleaning to prevent the slurry from solidifying and clogging the mesh.

[0008] 3. Graphic trajectory is not flexible:

[0009] Screen printing relies on screen printing plates. Complex patterns or long curved lines require considerable time to produce, so the screens are typically larger and require a larger footprint. For example, large screen machines can be several meters long and require additional space to house the screens, increasing site costs and management complexity.

[0010] 4. Low silver paste utilization rate:

[0011] During the screen printing process, the utilization rate of silver paste is relatively low. Since screen printing leaks the silver paste onto the printing substrate through the mesh holes, some silver paste particles will remain on the surface and inside the mesh holes of the screen during the printing process, making it difficult to utilize. Moreover, a certain amount of silver paste will be wasted when cleaning the screen plate. Therefore, when screen printing large-area patterns, silver paste will accumulate at the edge part, and this part of the silver paste cannot be effectively utilized, further increasing the material cost.

[0012] In view of the above defects, the inventor actively carried out research and innovation in order to create a PDLC silver paste coating device, making it more valuable for industrial use. Summary of the Invention

[0013] To solve any of the above technical problems, the object of the present invention is to provide a PDLC silver paste coating device.

[0014] To achieve the above object, the present invention adopts the following technical solutions:

[0015] The PDLC silver paste coating device includes a frame and a motion platform assembly installed on the frame;

[0016] The motion platform assembly includes an adsorption platform installed inside the frame. On both sides of the adsorption platform on the frame, front-back moving modules are installed. The front-back moving modules drive the two gantry frames above to move in the front-back direction. The left-right moving module installed on the gantry frame drives the lifting module to move in the left-right direction, and the lifting module drives the silver paste coating assembly to move up and down;

[0017] The silver paste coating assembly includes a Z-axis fixing plate connected to the lifting module. A coating control mechanism is installed on the Z-axis fixing plate. The coating control mechanism includes a silver paste tube, a hollow rotating platform, and a silver paste adapter from top to bottom. The silver paste tube and the hollow rotating platform are both installed on the Z-axis fixing plate. The hollow rotating platform drives the rotating fixed bottom plate below to rotate. A motion slide plate is installed on the front side of the rotating fixed bottom plate. The fine-tuning slide installed on the motion slide plate drives the silver paste adapter on the front side to move up and down.

[0018] As a further improvement of the present invention, an outer cover is installed on the frame outside the motion platform assembly, and a boom control box is installed on one side of the outer cover.

[0019] As a further improvement of the present invention, the adsorption platform is a porous adsorption aluminum plate.

[0020] As a further improvement of the present invention, a high-magnification lens is installed on the Z-axis fixing plate on the left side of the coating control mechanism, a light source is installed on the Z-axis fixing plate below the high-magnification lens, and a laser altimeter is installed on the Z-axis fixing plate on the right side of the coating control mechanism.

[0021] As a further improvement of the present invention, a needle table is installed on the Z-axis fixing plate below the silver paste adapter.

[0022] As a further improvement of the present invention, a roller frame is installed on the Z-axis fixing plate outside the silver paste adapter, and follower rollers are installed on both the left and right sides inside the roller frame.

[0023] As a further improvement of the present invention, a stop valve is installed on the Z-axis fixing plate between the silver paste tube and the silver paste adapter.

[0024] As a further improvement of the present invention, a needle cleaning assembly is installed at the opening on one side of the adsorption platform. The needle cleaning assembly includes a needle cleaning substrate installed on the adsorption platform. Along the left-right direction, two winding wheels are installed side by side on the needle cleaning substrate. A number of guide rollers are installed on the needle cleaning substrate between the two winding wheels. The speed regulating motor installed on the right side of the needle cleaning substrate is connected to the right winding wheel through a belt drive module. The cleaning structure wound on the two winding wheels is connected together through a number of guide rollers.

[0025] As a further improvement of the present invention, the cleaning structure is a dust-free cloth.

[0026] By means of the above solution, the present invention has at least the following advantages:

[0027] With the double gantry structure of the present invention, the structure is compact, the equipment occupies a small floor area, the processing size is large, and the two gantries cooperate with each other for simultaneous processing, which can greatly improve the processing efficiency.

[0028] The present invention is compatible with graphic processing of multiple trajectories, has a low cost, and does not require the process of regularly cleaning the screen plate.

[0029] The present invention adopts the Z-axis to cooperate with the double-drive gantry and the coating module to realize the coating processing of large-format and complex trajectory patterns.

[0030] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following will be described in detail with reference to the preferred embodiments of the present invention and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of a PDLC silver paste coating device of the present invention;

[0033] Figure 2 is Figure 1 The structural schematic diagram after removing the outer cover in

[0034] Figure 3 is Figure 2 The structural schematic diagram of the silver paste coating assembly in

[0035] Figure 4 is Figure 3 The exploded structural schematic diagram of the coating control mechanism in

[0036] Figure 5 is Figure 2 The structural schematic diagram of the needle cleaning assembly in

[0037] Among them, the meanings of the respective reference numerals in the figure are as follows.

[0038] Frame 1, moving platform assembly 2, outer cover 3, boom control box 4;

[0039] Adsorption platform 21, front and rear moving module 22, gantry 23, left and right moving module 24, lifting module 25, silver paste coating assembly 26, needle cleaning assembly 27;

[0040] Z-axis fixing plate 261, coating control mechanism 262, high-power lens 263, light source 264, laser altimeter 265, alignment table 266;

[0041] Silver paste pipe 2621, hollow rotating platform 2622, rotating fixed bottom plate 2623, fine-tuning slide 2624, moving slide plate 2625, silver paste adapter 2626, follower roller 2627, stop valve 2628;

[0042] Needle cleaning substrate 271, speed control motor 272, winding wheel 273, guide roller 274, cleaning structure 275. Detailed implementation manners

[0043] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0044] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention usually described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but only represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0045] As Figure 1 shown, a PDLC silver paste coating device in this embodiment has an overall dimension of 3690*3050*2010mm and mainly consists of a frame 1, a moving platform assembly 2, an outer cover 3, and a boom control box 4.

[0046] The moving platform assembly 2 is connected to the frame 1 through side fixing plates and a number of M16 bolts with polyurethane vibration isolation pads. The outer cover 3 is installed on the frame 1 outside the moving platform assembly 2 through a number of bolts, and a boom control box 4 is installed on one side of the outer cover 3.

[0047] As Figure 2 shown, the moving platform assembly 2 mainly includes a suction platform 21, a front-back moving module 22, a gantry 23, a left-right moving module 24, a lifting module 25, a silver paste coating assembly 26, and a needle cleaning assembly 27.

[0048] The suction platform 21 is a porous suction aluminum plate installed inside the frame 1. The suction platform 21 is connected to the frame 1 through bolts and has certain flatness accuracy requirements, and is mainly used for the suction treatment of products to be processed.

[0049] The front-back moving modules 22 installed on both sides of the frame 1 on the left and right of the suction platform 21 are used to drive the two gantries 23 located in the front and back to move in the front-back direction. The left-right moving module 24 installed on the gantry 23 drives the lifting module 25 to move in the left-right direction, and the lifting module 25 drives the silver paste coating assembly 26 to move up and down.

[0050] The silver paste coating assembly 26 is connected to the moving platform Z-axis slide plate of the lifting module 25 through bolts, so that the silver paste coating assembly follows the Z-axis movement. A waste collection box is installed on the suction platform 21 on one side below the silver paste coating assembly 26.

[0051] The adsorption platform 21 and the two gantry frames 23 form a typical double-drive gantry structure. Both the two front-back directions and the two left-right directions are driven by linear motors, and the lifting module 25 is driven by a servo motor. The overall gantry frame 23 is connected to the front-back moving modules 22 on both sides by bolts, so that the gantry frame 23 moves with the front-back moving modules 22. Finally, it is precisely controlled by the control unit of the boom control box 4 to achieve the precise movement of the silver paste coating assembly 26, thereby realizing the function of precise silver paste coating.

[0052] As Figure 3 , the silver paste coating assembly Figure 3 is the core component of this embodiment and also the end processing device. The whole machine has two processing stations, and realizes the bidirectional coating of the PDLC film through the control system.

[0053] The silver paste coating assembly 26 includes a Z-axis fixed plate 261 connected to the lifting module 25. A coating control mechanism 262 is installed on the Z-axis fixed plate 261. The coating control mechanism 262 includes a silver paste tube 2621, a hollow rotating platform 2622, and a silver paste adapter 2626 from top to bottom. Both the silver paste tube 2621 and the hollow rotating platform 2622 are installed on the Z-axis fixed plate 261. The hollow rotating platform 2622 drives the rotating fixed bottom plate 2623 below to rotate. A moving slide plate 2625 is installed on the front side of the rotating fixed bottom plate 2623, and the fine-tuning slide 2624 installed on the moving slide plate 2625 drives the silver paste adapter 2626 on the front side to move up and down.

[0054] The silver paste comes from the whole silver paste tube 2621 and is stably fixed and installed on the Z-axis fixed plate 261 by the silver paste fixing bracket.

[0055] Figure 4 is an exploded view of the core component parts (i.e., the coating control mechanism 262), mainly realizing precise silver paste coating. During the working process, the hollow rotating platform 2622 controls the coating direction to make the coating move along the drawing trajectory.

[0056] A roller rack is installed on the Z-axis fixed plate 261 outside the silver paste adapter 2626, and follower rollers 2627 are installed on both the left and right sides inside the roller rack. The moving slide plate 2625 connects the rotating fixed bottom plate 2623 and the fine-tuning slide 2624 to realize the up and down micro-movement of the silver paste adapter 2626 under the guidance of the follower rollers 2627, ensuring the uniformity of silver paste coating.

[0057] A stop valve 2628 is installed on the Z-axis fixed plate 261 between the silver paste tube 2621 and the silver paste adapter 2626. To ensure that the silver paste is not wasted, the stop valve 2628 cuts off the passage after the work is completed, and at this time the silver paste cannot flow down.

[0058] A high-magnification lens 263 is installed on the Z-axis fixing plate 261 on the left side of the coating control mechanism 262. A light source 264 is installed on the Z-axis fixing plate 261 below the high-magnification lens 263. A laser altimeter 265 is installed on the Z-axis fixing plate 261 on the right side of the coating control mechanism 262.

[0059] At the same time, a precise visual cooperation is required for the high-precision coating process. The high-magnification lens 263 and the light source 264 cooperate with the motion control system to capture and upload the picture in real time, and then cooperate with the laser altimeter 265 to measure the height between the coating head and the material surface for compensation, so that the coating head maintains a certain height movement throughout the process, effectively improving the accuracy of coating.

[0060] A needle calibration table 266 is installed on the Z-axis fixing plate 261 below the silver paste adapter 2626. The silver paste adapter 2626 can be calibrated regularly through the needle calibration table 266.

[0061] Among them, the above-mentioned needle calibration table 266, fine-tuning slide table 2624 and stop valve 2628 are all conventional technologies in the field.

[0062] In addition, the frame 1 integrates an air circuit, a circuit and a control unit, which are composed of multiple electric control cabinets and a boom control box 4.

[0063] An electric control panel is installed inside the electric control cabinet as an attachment board for electrical components. There is also a cooling fan to assist in heat dissipation, providing a safe and favorable working environment for the control module. The frame 1 as a load-bearing component is welded by 100*100*5mm square tubes, and 6 floor feet are installed at the bottom to support the overall weight. In addition, an industrial computer, a solenoid valve and a triple unit are installed on the frame 1 to make reasonable use of space and increase space utilization rate.

[0064] Such as Figure 5 , a needle cleaning component 27 is installed at the opening on one side of the adsorption platform 21. The needle cleaning component 27 includes a needle cleaning substrate 271 installed on the adsorption platform 21. Two winding wheels 273 are installed side by side on the needle cleaning substrate 271 in the left-right direction. A number of guide rollers 274 are installed on the needle cleaning substrate 271 between the two winding wheels 273. The speed control motor 272 installed on the right side of the needle cleaning substrate 271 is connected to the right winding wheel 273 through a belt drive module. The cleaning structure 275 (dust-free cloth) wound on the two winding wheels 273 is connected together through a number of guide rollers 274.

[0065] The needle cleaning component mainly includes a dust-free cloth wiping component controlled by the speed control motor 272. A custom-sized dust-free cloth roll is installed and the needle (i.e., the silver paste adapter 2626) is always wiped with a clean dust-free cloth driven by the motor.

[0066] The present invention adopts a double gantry structure, which is compact, has a small floor area for the equipment, a large processing size, and the two gantries cooperate with each other for simultaneous processing, which can greatly improve the processing efficiency.

[0067] It is compatible with graphic processing of multiple trajectories, has a low cost, and does not require the process of regularly cleaning the screen printing plate.

[0068] The Z-axis is used in cooperation with the double-drive gantry and the coating module to realize the coating processing of large-format and complex-trajectory patterns.

[0069] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0070] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0071] The above description is only a preferred embodiment of the present invention and is not used to limit the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. PDLC silver paste coating equipment, including a frame (1) and a moving platform assembly (2) installed on the frame (1); It is characterized in that: The moving platform assembly (2) includes a suction platform (21) installed inside the frame (1). On the frame (1) on both the left and right sides of the suction platform (21), front-back moving modules (22) are installed. The front-back moving modules (22) drive the two gantry frames (23) above to move in the front-back direction. The left-right moving module (24) installed on the gantry frame (23) drives the lifting module (25) to move in the left-right direction. The lifting module (25) drives the silver paste coating assembly (26) to move up and down; The silver paste coating assembly (26) includes a Z-axis fixing plate (261) connected to the lifting module (25). On the Z-axis fixing plate (261), a coating control mechanism (262) is installed. The coating control mechanism (262) includes a silver paste pipe (2621), a hollow rotating platform (2622), and a silver paste adapter (2626) from top to bottom. The silver paste pipe (2621) and the hollow rotating platform (2622) are both installed on the Z-axis fixing plate (261). The hollow rotating platform (2622) drives the rotating fixed bottom plate (2623) below to rotate. On the front side of the rotating fixed bottom plate (2623), a moving slide plate (2625) is installed. The fine-tuning slide (2624) installed on the moving slide plate (2625) drives the silver paste adapter (2626) on the front side to move up and down.

2. The PDLC silver paste coating device according to claim 1, wherein, An outer cover (3) is installed on the frame (1) outside the moving platform assembly (2), and a boom control box (4) is installed on one side of the outer cover (3).

3. The PDLC silver paste coating device according to claim 1, wherein The suction platform (21) is a porous suction aluminum plate.

4. The PDLC silver paste coating equipment according to claim 1, characterized in that, A high-power lens (263) is installed on the Z-axis fixing plate (261) on the left side of the coating control mechanism (262). A light source (264) is installed on the Z-axis fixing plate (261) below the high-power lens (263). A laser altimeter (265) is installed on the Z-axis fixing plate (261) on the right side of the coating control mechanism (262).

5. The PDLC silver paste coating equipment according to claim 1, characterized in that A needle table (266) is installed on the Z-axis fixing plate (261) below the silver paste adapter (2626).

6. The PDLC silver paste coating equipment according to claim 1, wherein A roller frame is installed on the Z-axis fixing plate (261) outside the silver paste adapter (2626). Follow-up rollers (2627) are installed on both the left and right sides inside the roller frame.

7. The PDLC silver paste coating equipment according to claim 1, wherein, A stop valve (2628) is installed on the Z-axis fixing plate (261) between the silver paste pipe (2621) and the silver paste adapter (2626).

8. The PDLC silver paste coating equipment according to claim 1, wherein, A needle cleaning assembly (27) is installed at an opening on one side of the adsorption platform (21). The needle cleaning assembly (27) includes a needle cleaning substrate (271) installed on the adsorption platform (21). Two winding wheels (273) are installed side by side along the left-right direction on the needle cleaning substrate (271). A number of guide rollers (274) are installed on the needle cleaning substrate (271) between the two winding wheels (273). A speed regulating motor (272) installed on the right side of the needle cleaning substrate (271) is connected to the winding wheel (273) on the right side through a belt transmission module. The cleaning structure (275) wound on the two winding wheels (273) is connected together through a number of guide rollers (274).

9. The PDLC silver paste coating device according to claim 8, wherein, The cleaning structure (275) is a dust-free cloth.

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