PI film coating clamp and coating equipment

Abstract

The invention relates to a PI film coating clamp and coating equipment, and relates to the technical field of PI film coating. The device mainly comprises a clamp structure composed of a base and a pressing plate, the base is provided with a crimping groove and a baking opening, the pressing plate can be placed in the crimping groove, a first injection channel and a second injection channel of a water injection channel are formed by the pressing plate and the base, and accurate positioning and stable connection are achieved through matching of an insertion opening and a bellmouth; in addition, the equipment comprises a conveying mechanism, a coating mechanism, a drying mechanism and a cooling mechanism, and it is guaranteed that the PI film coating process is efficient, uniform and rapid in cooling and shaping. According to the PI film coating device, the effects of improving the PI film coating production efficiency and optimizing the coating quality are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of PI film coating, and in particular to a PI film coating fixture and coating equipment. Background Art

[0002] Polyimide (PI) film has been widely used in electronics, aerospace and other fields due to its excellent high temperature resistance and mechanical strength. Especially in the application of printed steel screen, the quality of PI film directly affects the reliability and service life of the product. With the growth of market demand and the advancement of technology, efficient and stable PI film preparation process has gradually become the focus of industry attention. At present, the traditional PI film preparation method mainly relies on heating and drying to achieve the curing and molding of PI solution. This process occupies a dominant position in industrial production and plays a key role in improving product quality and production efficiency.

[0003] In order to ensure the quality of PI film, various heating methods are usually used in actual production to complete the curing process of PI solution. Common methods include direct hot air drying, infrared radiation heating and conduction heating. Among them, direct hot air drying uses high-speed airflow to carry away the solvent to achieve drying; infrared radiation heating uses the energy of electromagnetic waves to accelerate molecular motion and promote water evaporation; and conduction heating uses metal conductors to transfer heat to the object to be processed. These traditional methods have their own characteristics and are widely used in PI film processing in different scenarios.

[0004] However, there is a common problem with the above conventional methods, that is, it is difficult to strike a balance between the heating rate and the product quality. Neither rapid heating nor slow heating can meet the requirements of efficient production and high quality at the same time. Specifically, although rapid heating improves production efficiency, it can easily cause problems such as uneven surface of the PI film and even bubbles due to the rapid evaporation of the solvent; while slow heating can improve these problems, it significantly reduces production efficiency and increases manufacturing costs. Therefore, how to improve the drying efficiency while ensuring the quality of the PI film has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In order to solve the above problems, the present application provides a PI film coating fixture and coating equipment.

[0006] The present application provides a PI film coating fixture and coating equipment, which adopts the following technical solutions: A PI film coating fixture comprises a base and a pressing plate, wherein the base is provided with a crimping groove for installing the pressing plate, and a base edge is formed on the peripheral side of the crimping groove, when the pressing plate is placed in the crimping groove, the top of the base edge is lower than the top of the pressing plate, the middle parts of the base and the pressing plate are longitudinally aligned and provided with the same baking port, the inside of the pressing plate and the base are provided with channels for water injection to form a first injection channel and a second injection channel, and the first injection channel and the second injection channel are provided around the contour of the baking port.

[0007] By adopting the above technical solutions, the combined design of the base and the pressure plate can stably fix the PI film on the steel screen to ensure the accuracy of the coating process. The alignment setting of the baking port facilitates uniform heating and accelerates the curing speed of the PI solution. The layout of the first and second injection channels around the baking port realizes the effective conduction of heat energy, which helps to control the heating rate, thereby optimizing the balance between the quality of the PI film and production efficiency.

[0008] Preferably, the first injection channel and the second injection channel both include an inlet and an outlet arranged adjacent to each other, the inlet and the outlet of the first injection channel are respectively fixedly provided with a socket, and the inlet and the outlet of the second injection channel are respectively fixedly provided with a socket, the socket is arranged on a side of the pressure plate facing the base and is protruded from the surface of the pressure plate, the socket is arranged on a side of the base facing the pressure plate and is recessed in the base, the socket and the socket are plugged into each other, and after the socket and the socket are plugged into each other, the horizontal movement of the pressure plate is limited and the pressure plate can only move upward to leave the crimping groove.

[0009] By adopting the above technical solution, a stable connection and precise fit between the pressing plate and the base are achieved. Specifically, the plug-in design of the socket and the socket effectively limits the horizontal movement of the pressing plate, avoiding positional displacement during use, thereby ensuring the stability of the PI film coating process. At the same time, the design allows the pressing plate to only move upward to disengage from the crimping groove, which simplifies the assembly and disassembly process and improves operational efficiency. In addition, the inlet and outlet of the first injection channel and the second injection channel are arranged adjacent to each other, which facilitates the smooth circulation of water flow, helps to evenly control the temperature, and improves the quality and drying effect of the PI film.

[0010] Preferably, at least one baffle and at least two magnetic blocks are fixedly provided on a side of the base away from the pressure plate, the baffle is protruding from the surface of the base, the magnetic blocks are recessed in the base, the magnetic blocks are provided in an even number, and the magnetic blocks are symmetrically distributed along the extension line of the baffle so that the overall distribution shape of the baffle and the magnetic blocks is triangular.

[0011] By adopting the above technical solution, the setting of the baffle and the magnetic block can enhance the stability of the base and prevent it from shifting or flipping during the transmission process. Specifically, the baffle protrudes from the surface of the base, which can improve its own impact resistance and facilitate the sudden driving of the base to move. The magnetic blocks are set in a concave shape and are symmetrically distributed in number and position along the extension line of the baffle to form a triangular layout, which not only increases the adsorption force of the base on the chain plate, but also ensures that the attraction is evenly distributed, thereby further improving the stability of the entire device during operation. This design not only ensures processing accuracy but also improves production safety.

[0012] Preferably, a water injection joint and a water outlet joint are arranged on a surface of the base close to the baffle, and a water flow channel is also opened in the base for connecting the water injection joint and the water outlet joint with the socket respectively.

[0013] By adopting the above technical solution, water circulation can be achieved in the base, thereby effectively adjusting the temperature of the base. Specifically, the design of the water injection joint and the water outlet joint facilitates the introduction and discharge of water, and the setting of the water flow channel ensures that the water flow can smoothly reach the socket position, thereby uniformly cooling or heating the inside of the base. This design not only helps to accurately control the temperature of the base, but also affects the cooling rate of the PI film, avoiding quality problems caused by excessive temperature differences, such as uneven surface or bubble generation, and ultimately improving the overall quality of the PI film.

[0014] A PI film coating device comprises a conveying mechanism, a coating mechanism, a drying mechanism and a cooling mechanism, wherein the drying mechanism comprises a first dryer and a second dryer.

[0015] By adopting the above technical solution, efficient and automated production of the PI film coating process is achieved. The coordinated operation of the conveying mechanism, coating mechanism, drying mechanism and cooling mechanism significantly improves the integration of the production line, reduces manual intervention, and improves production continuity and consistency. The dual-stage drying mode of the first dryer and the second dryer enables the first dryer to preheat the PI film, so that the overall temperature of the steel screen and the PI film is preheated from room temperature to a certain temperature, and then the PI film is quickly heated by the second dryer. The combination of preheating and rapid heating can reduce the curling and cracking of the PI film.

[0016] Preferably, the conveying mechanism includes a loading conveying platform, a conveying frame and a conveying chain. The conveying chain is composed of a plurality of chain plates hinged together. The chain plates are hinged at the head and tail to form a closed ring structure. The conveying chain is arranged on both sides of the conveying frame along the length direction of the conveying frame. The conveying frame is also fixed with a motor and a driving wheel for driving the conveying chain.

[0017] By adopting the above technical solution, the conveyor chain is composed of multiple chain plates hinged together and is hinged at the head and tail to form a closed ring structure, so that the conveyor mechanism can stably and continuously transport the base, improving the automation and efficiency of the production process. At the same time, the conveyor chain is set on both sides of the conveyor frame and used in conjunction with the motor and drive wheel to ensure the uniformity of power transmission and operational stability during the transmission process, thereby reducing the equipment failure rate and improving the reliability of the overall production line.

[0018] Preferably, at most one driving plate or one magnetic strip is fixedly disposed on a single chain plate.

[0019] By adopting the above technical solution, the restriction condition that only one drive plate or one magnetic strip is fixed on a single chain plate ensures the uniformity of force between the chain plates, avoids structural deformation or damage caused by excessive local load, and thus improves the stability and reliability of the entire transmission mechanism. This design optimizes the operating performance of the equipment while ensuring normal transmission function.

[0020] Preferably, the cooling mechanism includes a first inclined plate and a second inclined plate, the second inclined plate is spliced ​​along the long side of the first inclined plate, a limiting plate is fixedly provided on the end of the first inclined plate away from the drying mechanism, a main water injection pipe is provided on the limiting plate, a lifting cylinder and a pushing cylinder are fixedly provided on the limiting plate, a lifting plate is fixedly provided on the output shaft of the lifting cylinder, a plurality of rollers are provided on the lifting plate, and a pushing plate is fixedly provided on the output shaft of the pushing cylinder.

[0021] By adopting the above technical solution, the design of the cooling mechanism realizes efficient cooling of the PI film after coating. Specifically, the splicing structure of the first inclined plate and the second inclined plate facilitates the smooth transition of the material. At the same time, the lifting cylinder and the pushing cylinder on the limit plate work together to automatically complete the lifting and pushing actions of the base. The multiple rollers on the lifting plate reduce friction resistance and ensure the stability of the base during the lifting process, while the push plate effectively pushes the base to the next step, improving the automation and work efficiency of the entire production equipment.

[0022] Preferably, the coating mechanism includes a coating bracket and a coating module, the coating bracket is mounted on the loading and conveying platform, and a mounting frame with a cage-type structure is fixedly provided on the side of the coating bracket facing the loading and conveying platform, a stepped shaft and a coating motor for driving the stepped shaft are arranged in the mounting frame, and a spring for resetting is sleeved on the stepped shaft.

[0023] By adopting the above technical solutions, the combination of the coating bracket and the feeding conveyor makes the coating operation more stable and reliable, and improves the accuracy and consistency of the PI film coating process. The design of the cage-type mounting frame enhances the structural stability while providing good support and protection for the internal components. The combination of the stepped shaft and the coating motor realizes precise coating action control to ensure uniform coating thickness. The setting of the spring can provide appropriate buffering force during the coating process, reduce quality problems caused by accidental impact, and thus improve the working stability and service life of the coating head.

[0024] Preferably, the coating module includes a fixed block, a coating head and a scraper, the fixed block is installed on the end of the stepped shaft away from the coating motor, the coating head and the scraper are coplanar on the fixed block, and the scraper is bent in an L shape toward the coating head.

[0025] By adopting the above technical solution, the combined design of the fixed block, coating head and scraper can achieve precise coating operation. Specifically, the fixed block is installed at one end of the stepped shaft to ensure the position stability and operational reliability of the entire coating module. The coating head and scraper are arranged on the same plane, so that the material can be applied and leveled at the same time during the coating process, improving the quality and uniformity of the coating. In addition, the L-shaped curved scraper design can effectively remove excess paint during the coating process, avoiding the phenomenon of excessively thick or uneven coating, thereby improving the performance and appearance of the final product.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the first and second injection channels surrounding the baking port in the base and the pressing plate, circulating water can be introduced after the drying process is completed to effectively control the heating rate, thereby avoiding the uneven surface or bubble problems of the PI film caused by too fast temperature changes, and improving the quality of the PI film; 2. Through the independently set first dryer and second dryer, the equipment can realize the function of preheating the wire mesh and PI film, reducing the risk of cracking of the PI film. At the same time, the preheating treatment can quickly heat the temperature of the second stage, thereby shortening the overall heating process. After the drying process, the base is cooled by introducing circulating water to speed up the cooling speed of the PI film, thereby improving the overall production efficiency and improving the quality of the PI film. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional view of the PI film coating fixture; Figure 2 and Figure 3 It is an exploded view of the PI film coating fixture; Figure 4 is a perspective view of the PI film coating fixture; Figure 5 It is a three-dimensional view of the PI film coating equipment; Figure 6 It is a partial enlarged view of the specific structure of the conveyor chain; Figure 7 It is a detailed structural view of the coating mechanism; Figure 8 is an enlarged view of the cooling mechanism.

[0028] Explanation of reference numerals: 1, base; 11, baking port; 12, socket; 13, baffle; 14, magnetic block; 15, crimping groove; 16, base edge; 17, second injection channel; 171, socket; 18, water injection joint; 19, water outlet joint; 2, pressing plate; 21, first injection channel; 31, coating bracket; 32, mounting bracket; 321, spring; 322, stepped shaft; 323, fixing block; 324, coating head; 325, scraper; 33, coating Motor; 41, first dryer; 42, second dryer; 51, conveyor chain; 511, magnetic strip; 512, drive plate; 513, chain plate; 52, motor drive; 53, drive wheel; 54, conveyor rack; 55, loading and conveying platform; 61, first inclined plate; 62, second inclined plate; 63, limit plate; 631, main water injection pipe; 71, lifting cylinder; 711, lifting plate; 712, roller; 72, push cylinder; 721, push plate. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-8 This application is described in further detail.

[0030] In the description of the invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the invention.

[0031] The present application embodiment discloses a PI film coating fixture, which is mainly used to fix the steel screen. Figure 1 , Figure 2 and Figure 3, including a base 1 and a pressing plate 2. The base 1 is provided with a crimping groove 15 for installing the pressing plate 2, and a base edge 16 is formed on the periphery of the crimping groove 15. The crimping groove 15 is used to place the steel mesh. After the steel mesh is placed, the pressing plate 2 is pressed on the steel mesh, and the steel mesh is fixed by the self-weight of the pressing plate 2. Since the top of the steel mesh needs to be sprayed with PI film solution, when the pressing plate 2 is placed in the crimping groove 15, the top of the base edge 16 is lower than the top of the pressing plate 2. This setting can facilitate scraping off the excess PI film solution. In order to achieve precise PI film thickness, the same baking opening 11 is longitudinally aligned in the middle of the base 1 and the pressing plate 2. The baking opening 11 on the base 1 is mainly used to transfer heat from the bottom of the base 1 to the wire mesh. In addition to the above functions, the baking opening 11 on the pressing plate 2 can also smooth the PI film solution, including but not limited to controlling the thickness of the pressing plate 2 or the wall thickness of the baking opening 11 of the pressing plate 2 to control the spraying amount of the PI film solution, accurately control the thickness of the PI film, and the over-sprayed PI film solution can be scraped off by a scraper 325.

[0032] After the PI film is dried, the speed of the PI film production line can be increased by rapid cooling, thereby improving the overall drying effect of the PI film. Therefore, channels for water injection are provided inside the pressing plate 2 and the base 1 to form the first injection channel 21 and the second injection channel 17. The first injection channel 21 and the second injection channel 17 are opened around the contour of the baking port 11, but the opening shape of the first injection channel 21 and the second injection channel 17 is not limited. The opening diameter size and opening length of the first injection channel 21 and the second injection channel 17 can be set according to actual conditions, but the first injection channel 21 and the second injection channel 17 need to be opened on the periphery of the baking port 11 to achieve an efficient cooling effect. The first injection channel 21 is composed of a small diameter round tube made of copper material as one of the basic components, because copper has excellent thermal conductivity and a relatively large specific surface area, which helps to better absorb or release heat to adjust the local ambient temperature. The first injection channel 21 and the second injection channel 17 both include an inlet and an outlet arranged adjacently. The inlet and outlet of the first injection channel 21 are respectively fixedly provided with a socket 12, and the inlet and outlet of the second injection channel 17 are respectively fixedly provided with a socket 171. The socket 12 is arranged on the side of the pressing plate 2 facing the base 1 and is protruded on the surface of the pressing plate 2. The socket 171 is arranged on the side of the base 1 facing the pressing plate 2 and is recessed in the base 1. The socket 12 and the socket 171 are arranged oppositely and adjacent to each other. This arrangement facilitates the plug-in matching of the socket 12 and the socket 171. When the socket 12 and the socket 171 are plugged in, the horizontal movement of the pressing plate 2 is limited and the pressing plate 2 can only move upward to leave the crimping groove 15. In addition, the socket 12 and the socket 171 are both sealed with sealing rings to prevent water leakage between the socket 12 and the socket 171. A water injection joint 18 and a water outlet joint 19 are arranged on a surface of the base 1 close to the baffle 13, and a water flow channel is also opened in the base 1 to connect the water injection joint 18 and the water outlet joint 19 with the socket 171 respectively. The water injection joint 18 and the water outlet joint 19 are mainly used to connect with an external waterway.

[0033] At least one baffle 13 and at least two magnetic blocks 14 are fixedly provided on one side of the base 1 away from the pressure plate 2. The baffle 13 is protruded from the surface of the base 1, and the magnetic blocks 14 are recessed in the base 1. The magnetic blocks 14 are arranged in an even number, and the magnetic blocks 14 are symmetrically distributed along the extension line of the baffle 13 so that the overall distribution shape of the baffle 13 and the magnetic blocks 14 is triangular.

[0034] The present application also discloses a PI film coating device, referring to Figure 5 , including a conveying mechanism, a coating mechanism, a drying mechanism and a cooling mechanism, and the drying mechanism includes a first dryer 41 and a second dryer 42.

[0035] Reference Figure 5 and Figure 6, since the PI film coating equipment needs to be used in conjunction with the PI film coating fixture, the maximum effect of the equipment can be brought into play. Considering that the conveying mechanism needs to transport the PI film coating fixture, the conveying mechanism includes a loading conveying platform 55, a conveying frame 54 and a conveying chain 51, and the conveying chain 51 is mainly used to transport the base 1. Specifically, the conveying chain 51 is composed of a plurality of chain plates 513 hinged together, so as to achieve relative rotation between the chain plates 513. The conveying chain 51 is formed into a closed annular structure by hingedly connecting the chain plates 513 at the head and tail, so that the conveying chain 51 can be easily driven to rotate in a cycle. The conveying chain 51 is arranged on both sides of the conveying frame 54 along the length direction of the conveying frame 54. The conveying frame 54 is also fixedly provided with a motor and a driving wheel 53 for driving the conveying chain 51. The motor drives the driving wheel 53 52 to rotate, so that the conveying chains 51 on both sides of the conveying frame 54 can be driven synchronously.

[0036] In order to make the conveyor chain 51 more compatible with the base 1, only one driving plate 512 or one magnetic strip 511 is fixedly provided on a single chain plate 513 at most. The driving plate 512 is provided corresponding to the baffle 13, and the magnetic strip 511 is provided corresponding to the magnetic block 14. When the conveyor chain 51 drives the base 1, the driving plate 512 and the baffle 13 are against each other, so that the base 1 can be moved, and the magnetic strip 511 and the magnetic block 14 are attracted to each other, so that the base 1 can have a more stable posture when moving. In addition, in the present application, in order to improve the heat dissipation capacity of the chain plate 513, mesh holes can be provided on the chain plate 513, and the mesh holes are used for heat dissipation. When the base 1 is transported by the conveyor chain 51, the chain plate 513 will also be baked. The provision of mesh holes can improve the heat dissipation capacity of the chain plate 513.

[0037] Reference Figure 7 and Figure 8 The cooling mechanism includes a first inclined plate 61 and a second inclined plate 62, the second inclined plate 62 is spliced ​​along the long side of the first inclined plate 61, a limiting plate 63 is fixedly provided at one end of the first inclined plate 61 away from the drying mechanism, a total water injection intubation 631 is provided on the limiting plate 63, a lifting cylinder 71 and a pushing cylinder 72 are fixedly provided on the limiting plate 63, a lifting plate 711 is fixedly provided on the output shaft of the lifting cylinder 71, a plurality of rollers 712 are provided on the lifting plate 711, and a pushing plate 721 is fixedly provided on the output shaft of the pushing cylinder 72. The splicing structure of the first inclined plate 61 and the second inclined plate 62 facilitates the smooth transition of the material, and the lifting cylinder 71 and the pushing cylinder 72 on the limiting plate 63 work together to automatically complete the lifting and pushing actions of the base 1. The plurality of rollers 712 on the lifting plate 711 reduce the friction resistance and ensure the stability of the base 1 during the lifting process.

[0038] The coating mechanism includes a coating bracket 31 and a coating module. The coating bracket 31 is mounted on the feeding conveying platform 55. A cage-shaped mounting frame 32 is fixedly provided on the side of the coating bracket 31 facing the feeding conveying platform 55. A stepped shaft 322 and a coating motor 33 for driving the stepped shaft 322 are provided in the mounting frame 32. A spring 321 for resetting is sleeved on the stepped shaft 322. The coating module includes a fixed block 323, a coating head 324 and a scraper 325. The fixed block 323 is mounted on the end of the stepped shaft 322 away from the coating motor 33. The coating head 324 and the scraper 325 are coplanar on the fixed block 323. The scraper 325 is bent in an L shape toward the coating head 324. The setting of the spring 321 provides a certain buffer for the contact between the coating head 324 and the scraper 325 to prevent the scraper 325 from scratching the pressure plate 2. The coating module adopts a method of spraying and scraping simultaneously to improve the coating efficiency of the PI film.

[0039] The implementation principle of the embodiment of the present application is as follows: the steel screen to be processed is placed in the crimping groove 15 on the base 1, and the pressing plate 2 is covered to make the two tightly combined. Thus, the steel screen is kept stable. The coating fixture is transported by the conveying mechanism, and the base 1 is first transported to the coating mechanism by the conveying mechanism for coating of the PI film solution, and then moved to the first drying machine 41 for preheating, and the PI film is preheated to a certain temperature, and then moved to the second drying machine 42, and the PI film is quickly heated by the second drying machine 42 to reach a temperature of complete solidification.

[0040] The coating fixture is continuously transported by the conveying mechanism, and finally the coating fixture slides down along the first inclined plate 61 and is blocked by the limiting plate 63. The limiting plate 63 is provided with a main water injection pipe 631. The first inclined plate 61 is carefully arranged to allow the coating fixture to slide down, so that the main water injection pipe 631 can be connected with the water injection joint 18 and the water outlet joint 19, and then liquid is injected into the coating fixture for cooling. After cooling is completed, the main water injection pipe 631 can discharge the liquid inside the coating fixture by injecting air.

[0041] After cooling, the lifting cylinder 71 moves the coating fixture and pulls out the main water injection pipe 631 from the water injection joint 18 and the water outlet joint 19. Finally, the pushing cylinder 72 pushes the coating fixture from the side, causing the coating fixture to slide off the second inclined plate 62 for unloading.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A PI film coating fixture, characterized in that: The invention comprises a base (1) and a pressing plate (2); the base (1) is provided with a pressing groove (15) for mounting the pressing plate (2); a base edge (16) is formed on the peripheral side of the pressing groove (15); when the pressing plate (2) is placed in the pressing groove (15), the top of the base edge (16) is lower than the top of the pressing plate (2); the middle parts of the base (1) and the pressing plate (2) are longitudinally aligned and provided with the same baking opening (11); channels for water injection are provided inside the pressing plate (2) and the base (1) to form a first injection channel (21) and a second injection channel (17); the first injection channel (21) and the second injection channel (17) are provided around the contour of the baking opening (11).

2. A PI film coating fixture according to claim 1, characterized in that: The first injection channel (21) and the second injection channel (17) both include an inlet and an outlet arranged adjacent to each other. The inlet and the outlet of the first injection channel (21) are respectively fixedly provided with a socket (12), and the inlet and the outlet of the second injection channel (17) are respectively fixedly provided with a socket (171). The socket (12) is arranged on a side of the pressure plate (2) facing the base (1) and is protruded from the surface of the pressure plate (2). The socket (171) is arranged on a side of the base (1) facing the pressure plate (2) and is recessed in the base (1). The socket (12) and the socket (171) are plugged into each other. After the socket (12) and the socket (171) are plugged into each other, the horizontal movement of the pressure plate (2) is restricted and the pressure plate (2) can only be moved upward to leave the crimping groove (15).

3. A PI film coating fixture according to claim 1, characterized in that: At least one baffle (13) and at least two magnetic blocks (14) are fixedly arranged on a side of the base (1) away from the pressure plate (2); the baffle (13) is protruding from the surface of the base (1), and the magnetic blocks (14) are recessed in the base (1); an even number of the magnetic blocks (14) are arranged, and the magnetic blocks (14) are symmetrically distributed along the extension line of the baffle (13), so that the overall distribution shape of the baffle (13) and the magnetic blocks (14) presents a triangle.

4. A PI film coating fixture according to claim 3, characterized in that: A water injection joint (18) and a water outlet joint (19) are provided on a surface of the base (1) close to the baffle (13), and a water flow channel is also provided in the base (1) for respectively connecting the water injection joint (18) and the water outlet joint (19) with the socket (171).

5. A PI film coating device, comprising the PI film coating fixture according to any one of claims 1 to 4, characterized in that: It comprises a conveying mechanism, a coating mechanism, a drying mechanism and a cooling mechanism, wherein the drying mechanism comprises a first drying machine (41) and a second drying machine (42).

6. A PI film coating device according to claim 5, characterized in that: The conveying mechanism comprises a loading conveying platform (55), a conveying frame (54) and a conveying chain (51); the conveying chain (51) is used to transport the base (1); the conveying chain (51) is composed of a plurality of chain plates (513) hinged together; the chain plates (513) are hinged at their ends to form a closed annular structure; the conveying chain (51) is arranged on both sides of the conveying frame (54) along the length direction of the conveying frame (54); and a motor and a driving wheel (53) for driving the conveying chain (51) are also fixedly arranged on the conveying frame (54).

7. A PI film coating device according to claim 6, characterized in that: At most, only one driving plate (512) or one magnetic strip (511) is fixedly arranged on a single chain plate (513).

8. A PI film coating device according to claim 5, characterized in that: The cooling mechanism comprises a first inclined plate (61) and a second inclined plate (62), wherein the second inclined plate (62) is spliced ​​along the long side of the first inclined plate (61), and a limiting plate (63) is fixedly arranged at one end of the first inclined plate (61) away from the drying mechanism, and a main water injection pipe (631) is arranged on the limiting plate (63), and a lifting cylinder (71) and a pushing cylinder (72) are fixedly arranged on the limiting plate (63), and a lifting plate (711) is fixedly arranged on the output shaft of the lifting cylinder (71), and a plurality of rollers (712) are arranged on the lifting plate (711), and a pushing plate (721) is fixedly arranged on the output shaft of the pushing cylinder (72).

9. A PI film coating device according to claim 6, characterized in that: The coating mechanism comprises a coating bracket (31) and a coating module, wherein the coating bracket (31) is mounted on the loading and conveying platform (55), and a mounting frame (32) with a cage-type structure is fixedly arranged on one side of the coating bracket (31) facing the loading and conveying platform (55), wherein a stepped shaft (322) and a coating motor (33) for driving the stepped shaft (322) are arranged in the mounting frame (32), and a spring (321) for resetting is sleeved on the stepped shaft (322).

10. A PI film coating device according to claim 9, characterized in that: The coating module comprises a fixed block (323), a coating head (324) and a scraper (325); the fixed block (323) is mounted on one end of the stepped shaft (322) away from the coating motor (33); the coating head (324) and the scraper (325) are coplanar on the fixed block (323); and the scraper (325) is bent in an L-shape in a direction toward the coating head (324).

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