PDLC silver paste coating equipment

Abstract

This utility model relates to a PDLC silver paste coating equipment, including a frame and a motion platform assembly mounted on the frame. The motion platform assembly includes an adsorption platform mounted inside the frame, and forward and backward moving modules are installed on the frame on both the left and right sides of the adsorption platform. The forward and backward moving modules drive two gantry frames above to move in the forward and backward direction. Left and right moving modules mounted on the gantry frames drive lifting modules to move in the left and right direction. The lifting modules drive the silver paste coating assembly to move up and down. This utility model, through its double gantry structure, features a compact structure, small footprint, and large processing capacity. The two gantry frames work together to process simultaneously, greatly improving processing efficiency. This utility model is compatible with various trajectory graphic processing, has low cost, and eliminates the need for periodic screen cleaning.

Description

Technical Field

[0001] This utility model relates to the technical field of silver paste coating processing, and in particular to a PDLC silver paste coating equipment. Background Technology

[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 characteristics. It has wide 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 coatings) and a middle PDLC functional layer.

[0003] Among these, silver paste has become the preferred choice for PDLC electrode technology due to its high conductivity, low cost, and good adhesion. Silver paste coating can significantly enhance the conductivity of the electrodes, improve production efficiency, and reduce material waste. Compared to screen printing, it has clear advantages, but existing screen printing processes still face the following technical bottlenecks:

[0004] 1. Low printing precision:

[0005] Traditional screen printing equipment uses a segmented splicing method, resulting in joints that may be separated or overlapped. This can cause uneven conductivity, affecting the dimming response speed and optical consistency. Furthermore, due to the elasticity and deformation of the screen, misregistration can easily occur during printing, making it difficult to control precision.

[0006] 2. Low printing efficiency:

[0007] Traditional screen printing is a complex process involving the creation of a screen printing plate, which includes a series of steps such as selecting the screen, stretching the screen, and exposing the plate. Each time the printing path is changed, the screen printing plate needs to be readjusted, wasting a significant amount of time. Furthermore, the screen printing plate requires regular and timely cleaning; otherwise, the hardened ink will clog the mesh.

[0008] 3. The graphic trajectory is not flexible:

[0009] Screen printing relies on screen printing stencils. For complex patterns or long curved lines, a lot of time is required to make the screen printing stencils. Therefore, the size of the screen printing stencils is generally large, and the equipment occupies a large area. For example, the length of a large screen printing machine may reach several meters, and additional space is needed to place the screen printing stencils, which increases the site cost and management difficulty.

[0010] 4. Low silver paste utilization rate:

[0011] In screen printing, the utilization rate of silver paste is relatively low. Because screen printing involves applying silver paste to the substrate through mesh openings, some silver paste particles remain on the screen surface and within the mesh openings during the printing process, making them difficult to utilize. Furthermore, a certain amount of silver paste is wasted during screen cleaning. Therefore, when printing large-area patterns, silver paste tends to accumulate at the edges, and this unused portion further increases material costs.

[0012] In view of the above-mentioned shortcomings, the designer has actively researched and innovated in order to create a PDLC silver paste coating equipment that has greater industrial application value. Utility Model Content

[0013] To solve any of the above-mentioned technical problems, the purpose of this utility model is to provide a PDLC silver paste coating equipment.

[0014] To achieve the above objectives, the present invention adopts the following technical solution:

[0015] PDLC silver paste coating equipment, including a frame and a motion platform assembly mounted on the frame;

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

[0017] The silver paste coating assembly includes a Z-axis fixed plate connected to the lifting module. A coating control mechanism is installed on the Z-axis fixed plate. The coating control mechanism includes, from top to bottom, a silver paste tube, a hollow rotating platform, and a silver paste adapter. Both the silver paste tube and the hollow rotating platform are installed on the Z-axis fixed plate. The hollow rotating platform drives the rotating fixed base plate below to rotate. A motion slide plate is installed on the front side of the rotating fixed base plate. The fine-tuning slide plate 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 this utility model, 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 this utility model, the adsorption platform is a porous adsorption aluminum plate.

[0020] As a further improvement of this utility model, 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 height measuring instrument is installed on the Z-axis fixing plate on the right side of the coating control mechanism.

[0021] As a further improvement of this utility model, a needle stage is installed on the Z-axis fixing plate below the silver paste adapter.

[0022] As a further improvement of this utility model, a roller frame is installed on the Z-axis fixing plate on the outside of 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 this utility model, a shut-off 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 this utility model, a needle cleaning assembly is installed at one side opening of the adsorption platform. The needle cleaning assembly includes a needle cleaning base plate installed on the adsorption platform. Two take-up rollers are installed side by side on the needle cleaning base plate in the left-right direction. Several guide rollers are installed on the needle cleaning base plate between the two take-up rollers. A speed-regulating motor installed on the right side of the needle cleaning base plate is connected to the right take-up roller through a belt drive module. The cleaning structure wound on the two take-up rollers is connected together by several guide rollers.

[0025] As a further improvement of this utility model, the cleaning structure is a lint-free cloth.

[0026] By means of the above solution, this utility model has at least the following advantages:

[0027] This utility model features a double gantry structure, which is compact, occupies a small area, and allows for large processing sizes. The two gantry structures work together to process simultaneously, greatly improving processing efficiency.

[0028] This invention is compatible with graphic processing of multiple trajectories, has low cost, and eliminates the need for regular screen cleaning.

[0029] This invention employs a Z-axis combined with a dual-drive gantry and a coating module to achieve coating processing of large-format, complex trajectory patterns.

[0030] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1This is a schematic diagram of the structure of a PDLC silver paste coating device according to the present invention;

[0033] Figure 2 yes Figure 1 A schematic diagram of the structure after removing the outer cover;

[0034] Figure 3 yes Figure 2 Schematic diagram of the structure of the silver paste coating assembly;

[0035] Figure 4 yes Figure 3 Exploded view of the intermediate coating control mechanism;

[0036] Figure 5 yes Figure 2 A schematic diagram of the structure of the middle needle cleaning assembly.

[0037] The meanings of the labels in the figures are as follows.

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

[0039] 21. Adsorption platform, 22. Front and rear moving module, 23. Gantry, 24. Left and right moving module, 25. Lifting module, 26. Silver paste coating assembly, 27. Needle cleaning assembly;

[0040] Z-axis fixing plate 261, coating control mechanism 262, high magnification lens 263, light source 264, laser height meter 265, and needle adjustment table 266;

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

[0042] Needle cleaning substrate 271, speed regulating motor 272, take-up roller 273, guide roller 274, cleaning structure 275. Detailed Implementation

[0043] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0044] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally 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 merely to illustrate 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 inventive effort are within the scope of protection of the present invention.

[0045] like Figure 1 As shown in the figure, a PDLC silver paste coating equipment in this embodiment has an external dimension of 3690*3050*2010mm and is mainly composed of a frame 1, a motion platform assembly 2, an outer cover 3, and a boom control box 4.

[0046] The motion platform assembly 2 is connected to the frame 1 by a side fixing plate and several M16 bolts with polyurethane vibration damping pads. The outer cover 3 is installed on the frame 1 outside the motion platform assembly 2 by several bolts. The boom control box 4 is installed on one side of the outer cover 3.

[0047] like Figure 2 The motion platform component 2 mainly includes an adsorption platform 21, a front and rear moving module 22, a gantry frame 23, a left and right moving module 24, a lifting module 25, a silver paste coating component 26, and a needle cleaning component 27.

[0048] The adsorption platform 21 is a porous aluminum plate that is installed on the inner side of the frame 1. The adsorption platform 21 is connected to the frame 1 by bolts and has certain requirements for planar accuracy. It is mainly used for adsorption treatment of products to be processed.

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

[0050] The silver paste coating assembly 26 is connected to the Z-axis slide plate of the motion platform of the lifting module 25 by bolts, so that the silver paste coating assembly moves with the Z-axis. A waste collection box is installed on the adsorption 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 dual-drive gantry structure. The two front-to-back directions and the two left-to-right directions are all driven by linear motors. The lifting module 25 is driven by a servo motor. The entire gantry frame 23 is connected to the front-to-back moving modules 22 on both sides by bolts, so that the gantry frame 23 moves with the front-to-back moving modules 22. Finally, the control unit of the boom control box 4 precisely controls the movement of the silver paste coating component 26, thereby realizing the function of precise silver paste coating.

[0052] like Figure 3 Silver paste coated components Figure 3 It is the core component of this embodiment and also the end processing device. The whole machine has two processing stations and achieves bidirectional coating of 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, from top to bottom, a silver paste tube 2621, a hollow rotating platform 2622, and a silver paste adapter 2626. 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 base plate 2623 below to rotate. A motion slide plate 2625 is installed on the front side of the rotating fixed base plate 2623. A fine-tuning slide 2624 installed on the motion slide plate 2625 drives the silver paste adapter 2626 on the front side to move up and down.

[0054] The silver paste originates from the entire silver paste tube 2621 and is stably fixed on the Z-axis mounting plate 261 by the silver paste holder.

[0055] Figure 4 The exploded view of the core component (i.e., the coating control mechanism 262) is mainly used to achieve precise coating of silver paste. During operation, the hollow rotating platform 2622 controls the coating direction, so that the coating moves along the trajectory of the drawing.

[0056] A roller frame is installed on the Z-axis fixing plate 261 on the outside of the silver paste adapter 2626, and follower rollers 2627 are installed on both the left and right sides inside the roller frame. The motion slide plate 2625 connects the rotating fixed base plate 2623 and the fine-tuning slide 2624 to enable the silver paste adapter 2626 to move up and down slightly under the guidance of the follower rollers 2627, ensuring the uniformity of silver paste coating.

[0057] A shut-off valve 2628 is installed on the Z-axis fixing plate 261 between the silver paste pipe 2621 and the silver paste adapter 2626. To ensure that the silver paste is not wasted, the shut-off valve 2628 cuts off the passage after the work is completed, at which 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 height meter 265 is installed on the Z-axis fixing plate 261 on the right side of the coating control mechanism 262.

[0059] Meanwhile, the high-precision coating process requires precise visual coordination. The high-magnification lens 263 and the light source 264 work together with the motion control system to capture and upload images in real time. Then, the laser height measuring instrument 265 measures 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 calibration station 266 is installed on the Z-axis fixing plate 261 below the silver paste adapter 2626, through which the silver paste adapter 2626 can be periodically calibrated.

[0061] Among them, the aforementioned needle stage 266, fine-tuning slide 2624 and shut-off valve 2628 are all conventional technologies in the field.

[0062] In addition, the frame 1 integrates the pneumatic circuit, electrical circuit and control unit, and consists of multiple electrical control cabinets and boom control box 4.

[0063] The electrical control cabinet houses the electrical control panel, which serves as a mounting plate for electrical components. A cooling fan further assists in heat dissipation, providing a safe and favorable working environment for the control modules. The load-bearing frame 1 is welded from 100*100*5mm square tubing, with six feet at the bottom to support the overall weight. In addition, the frame 1 also houses an industrial computer, solenoid valves, and triple units to make efficient use of space and increase space utilization.

[0064] like Figure 5 A needle cleaning assembly 27 is installed at one side opening of the adsorption platform 21. The needle cleaning assembly 27 includes a needle cleaning base plate 271 installed on the adsorption platform 21. Two take-up rollers 273 are installed side by side on the needle cleaning base plate 271 in the left-right direction. Several guide rollers 274 are installed on the needle cleaning base plate 271 between the two take-up rollers 273. A speed-regulating motor 272 installed on the right side of the needle cleaning base plate 271 is connected to the right take-up roller 273 through a belt drive module. The cleaning structure 275 (dust-free cloth) wound on the two take-up rollers 273 is connected together by several guide rollers 274.

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

[0066] This utility model features a double gantry structure, which is compact, occupies a small area, and allows for large processing sizes. The two gantry structures work together to process simultaneously, greatly improving processing efficiency.

[0067] It is compatible with multiple trajectories for graphic processing, has low cost, and does not require regular screen cleaning.

[0068] The Z-axis, combined with a dual-drive gantry and coating module, enables coating processing of large-format, complex trajectory patterns.

[0069] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0070] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A PDLC silver paste coating apparatus, comprising a frame (1) and a motion platform assembly (2) mounted on the frame (1); characterized in that The motion platform assembly (2) includes an adsorption platform (21) installed inside the frame (1). A front-to-back moving module (22) is installed on the frame (1) on both the left and right sides of the adsorption platform (21). The front-to-back moving module (22) drives the two gantry frames (23) above to move in the front-to-back direction. The left-to-right moving module (24) installed on the gantry frames (23) drives the lifting module (25) to move in the left-to-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). A coating control mechanism (262) is installed on the Z-axis fixing plate (261). The coating control mechanism (262) includes, from top to bottom, a silver paste tube (2621), a hollow rotating platform (2622), and a silver paste adapter (2626). Both the silver paste tube (2621) and the hollow rotating platform (2622) are installed on the Z-axis fixing plate (261). The hollow rotating platform (2622) drives the rotating fixed base plate (2623) below to rotate. A motion slide plate (2625) is installed on the front side of the rotating fixed base plate (2623). A fine-tuning slide (2624) installed on the motion slide plate (2625) drives the silver paste adapter (2626) on the front side to move up and down.

2. The PDLC silver paste coating apparatus of claim 1, wherein, An outer cover (3) is installed on the frame (1) outside the motion 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 apparatus of claim 1, wherein, The adsorption platform (21) is a porous aluminum plate.

4. The PDLC silver paste coating apparatus of claim 1, wherein, 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), and 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 apparatus of claim 1, wherein, A needle stage (266) is mounted on the Z-axis fixing plate (261) below the silver paste adapter (2626).

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

7. The PDLC silver paste coating apparatus of claim 1, wherein, A shut-off valve (2628) is installed on the Z-axis fixing plate (261) between the silver paste tube (2621) and the silver paste adapter (2626).

8. The PDLC silver paste coating apparatus of claim 1, wherein, A needle cleaning assembly (27) is installed at one side opening of the adsorption platform (21). The needle cleaning assembly (27) includes a needle cleaning base plate (271) installed on the adsorption platform (21). Two take-up rollers (273) are installed side by side on the needle cleaning base plate (271) in the left-right direction. Several guide rollers (274) are installed on the needle cleaning base plate (271) between the two take-up rollers (273). A speed-regulating motor (272) installed on the right side of the needle cleaning base plate (271) is connected to the right take-up roller (273) through a belt drive module. The cleaning structure (275) wound on the two take-up rollers (273) is connected together through several guide rollers (274).

9. The PDLC silver paste coating apparatus of claim 8, wherein, The cleaning structure (275) is a lint-free cloth.

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