A process for preparing a solar printing nickel mesh screen

Abstract

The application relates to a solar printing nickel mesh screen preparation process and relates to the technical field of nickel mesh screen manufacturing processes. The process comprises the following steps: S1, stretching a polyester mesh on a false frame to form a preliminary screen; S2, centrally placing a release film on the preliminary screen, covering a PE film and a nickel mesh screen gauze on the release film in sequence through hot melting operation, at this time, the nickel mesh screen gauze is in a state of shrinkage bending; S3, cutting the polyester mesh in the middle along the edge of the release film, taking out the release film, and forming a stepped structure between the PE film and the nickel mesh screen gauze; S4, performing a top frame operation on the false frame on a true frame, expanding the nickel mesh screen gauze under stress, obtaining stable straightness, fixing the polyester mesh on the true frame to form a screen; S5, cleaning the screen and pressing the screen with a PM film; S6, uniformly applying photosensitive glue to the periphery of the nickel mesh screen gauze, washing the screen after exposure, removing the photosensitive glue in the unexposed area, and completing screen preparation. The finished product screen has high straightness of the nickel mesh screen gauze, and therefore, the quality of the screen is high.

Description

Technical Field

[0001] This application relates to the field of nickel screen printing technology, and more particularly to a process for preparing a solar-printed nickel screen. Background Technology

[0002] Solar-grade nickel screen printing stencils play a crucial role in the photovoltaic industry, serving as one of the core tools for manufacturing high-efficiency solar cells. With the increasing global demand for renewable energy and the rapid development of photovoltaic power generation technology, the need for high-precision, high-quality solar-grade nickel screen printing stencils is becoming increasingly urgent. These stencils not only need excellent wear resistance and precise dimensional stability, but also must meet complex production process requirements to ensure the performance and efficiency of the final product.

[0003] In actual production, various traditional methods are typically employed to prepare solar-printed nickel screen printing stencils that meet the required specifications. For example, a simple adhesive method can be used to fix the metal mesh to the frame; or the metal wire can be manually stretched and embedded into the substrate, followed by specific chemical treatments to enhance structural strength. Another method involves using thermoforming technology to directly press pre-cut nickel alloy sheets onto the surface of the support layer, while simultaneously using precision machining techniques such as laser cutting to adjust shape details.

[0004] However, among the various existing technologies mentioned above, the nickel mesh is deformed due to tension during operations such as hot melting, cleaning, and top-frame application. This results in the finished nickel mesh being in an expanded state, leading to poor quality of the final screen. Therefore, improvements are needed. Summary of the Invention

[0005] To address the issue of poor straightness and consequently low screen quality caused by the expansion of nickel mesh under tension during screen printing, this application provides a process for preparing a solar-printing nickel mesh screen.

[0006] The present application provides a process for preparing a solar-powered printing nickel screen, which employs the following technical solution:

[0007] A process for preparing a solar-printed nickel screen printing plate includes the following steps:

[0008] S1. Lay the polyester mesh on the dummy frame to form a preliminary screen;

[0009] S2. Place the release film in the center on the preliminary screen, cover the release film with PE film, and use hot melt to make the PE film adhere the release film to the polyester screen.

[0010] S3. Cover the PE film with nickel mesh. At this time, the nickel mesh is in a contracted and bent state. Then, heat melt it again to fix the nickel mesh on the PE film.

[0011] S4. Cut the polyester mesh in the middle along the edge of the release film and remove the release film. At this time, a smooth step is formed between the PE film and the nickel mesh.

[0012] S5. Place the real frame directly below the fake frame, and use the real frame to perform a top frame operation on the polyester mesh, so that the nickel mesh yarn is stressed and expanded to obtain stable straightness. Fix the polyester mesh on the real frame, and cut the polyester mesh around the real frame so that the polyester mesh forms a screen on the real frame.

[0013] S6. After cleaning the screen, press it together with the PM film;

[0014] S7. Apply the photosensitive emulsion evenly around the nickel mesh, take the corresponding pattern film for comparison to complete the exposure, and during the development process, rinse the screen to remove the photosensitive emulsion in the unexposed areas and allow the photosensitive emulsion in the exposed areas to solidify.

[0015] By adopting the above technical solution, during the preparation process, the polyester mesh is first fixed on a dummy frame as a preliminary mesh frame. Then, the release film is placed in the middle of the polyester mesh, and a layer of PE film is covered on top. Next, a hot-melt operation is performed, which allows the PE film to penetrate into the polyester mesh, thereby fixing the PE film and the polyester mesh. The release film has a high melting point and will not stick to the polyester mesh and PE film. This allows the PE film to press the release film against the polyester mesh. Then, the nickel mesh is placed in the center relative to the PE film and pressed together.

[0016] Next, the initial screen frame is flipped over, with the polyester mesh, which was originally at the bottom, facing upwards. This facilitates the cutting of the polyester mesh. The cutting path follows the edge of the release film until the release film can be completely removed. At this point, the shape of the release film remains between the PE film and the nickel mesh, thus forming a step between the PE film and the nickel mesh. This prevents a large drop between the nickel mesh and the PE film, allowing the squeegee to move more smoothly on the nickel mesh during subsequent use. This reduces the stress on the squeegee, thereby reducing damage to the squeegee and the screen, and improving printing efficiency.

[0017] When the nickel mesh is pressed onto the polyester mesh, the nickel mesh is pre-compensated based on the tested inner arc angle, meaning the mesh lines converge towards the center of the nickel mesh. After the nickel mesh is installed on the polyester mesh, the initial mesh is placed above the actual frame. By manipulating the top of the actual frame, it is pressed firmly against the polyester mesh. Simultaneously, the nickel mesh expands under tension, causing the mesh lines to straighten and improving the quality of the finished screen. Next, glue is used to bond the actual frame to the polyester mesh. Then, excess polyester mesh is trimmed along the perimeter of the actual frame, finally forming the screen.

[0018] The screen is then cleaned to remove surface dust and impurities, and then pressed with the PM film. Next, photosensitive emulsion is evenly applied around the nickel mesh. The corresponding pattern film is compared and the exposure is completed. During the development process, the screen is rinsed to remove the photosensitive emulsion from the unexposed areas and allow the photosensitive emulsion in the exposed areas to solidify, thus sealing the edges of the nickel mesh and preventing pigment from flowing out from the gaps at the edges of the nickel mesh during subsequent use. Finally, the preparation of the entire screen is completed.

[0019] Optionally, in S6, the screen is cleaned by a cleaning device mounted on a work stand. The cleaning device includes a cleaning box and a moving component. The cleaning box is fixed on the work stand and has open ends along the length of the work stand. The cleaning box contains a cleaning component for cleaning the screen. The moving component is slidably connected to the work stand and can move within the cleaning box along the length of the work stand. Both ends of the moving component have mounting frames for mounting the screen. The two mounting frames are alternately aligned with the cleaning component, and the mounting frames can be moved out of the cleaning box from the opening.

[0020] By adopting the above technical solution, in the initial state, the mounting frame is set horizontally, and one of the mounting frames is located outside the cleaning tank. Then, the screen to be cleaned is placed on the mounting frame. Then, the moving component is activated to drive the mounting frame to move along the length of the work frame, so that the screen enters the cleaning tank from one end opening, while the other mounting frame moves out of the cleaning tank from the other end opening.

[0021] The operator then places the new screen onto the removed mounting frame, while the previous screen undergoes cleaning in the cleaning chamber. Once the previous screen is cleaned, the moving component resets the mounting frame, causing the previous screen to be moved out of the cleaning chamber again for unloading. Another mounting frame then carries the new screen into the cleaning chamber. During this process, the next screen is loaded while the previous screen is being cleaned, ensuring that each movement of the moving component carries one screen into the cleaning chamber for cleaning. This continuous cleaning process improves the efficiency of cleaning multiple screens.

[0022] Optionally, the moving component includes a moving rod, a moving motor, and a connecting rod. The moving rod is arranged along the length of the work frame, and its end is rotatably connected to the work frame. The moving motor is mounted on the work frame, and its output end is coaxially fixed with one end of the moving rod to drive the moving rod to rotate. The connecting rod is sleeved on the moving rod and threadedly connected to it. Its end is slidably connected to the work frame. The rotation of the moving rod drives the connecting rod to move along the length of the moving rod. The two mounting frames are connected by a mounting bracket, and the connecting rod is fixed to the mounting bracket.

[0023] By adopting the above technical solution, when the screen is placed on the mounting frame, the moving motor is started, which drives the moving rod to rotate. Since the moving rod is threadedly connected to the connecting rod, the connecting rod is driven to move along the length of the moving rod, which in turn drives the mounting frame and the two mounting frames to move along the length of the working frame. By using the forward and reverse rotation of the moving rod, the mounting frame can carry the screen into and out of the cleaning box, making the operation convenient.

[0024] Optionally, the mounting frame is provided with a fixing component for fixing the screen. The fixing component includes two fixing plates arranged opposite each other. The fixing plates are arranged along the width direction of the work frame. A support plate is fixed on the fixing plate. The support plate is arranged along the length direction of the fixing plate and is perpendicular to the fixing plate. When the screen is placed on the support plate, the fixing plate abuts against the side wall of the screen.

[0025] By adopting the above technical solution, in the initial state, the mounting frame is horizontal. When the screen is placed on the mounting frame, the screen abuts against the support plate, making the support plate horizontal, thereby making the fixing plate vertical. At this time, the fixing plate abuts against the circumferential side wall of the screen, restricting the screen from moving on the mounting frame. At the same time, the two fixing plates clamp the screen, thus fixing the screen in the mounting frame.

[0026] Optionally, the cleaning tank is provided with a flipping assembly, which includes a rotating wheel, a lever, and a grooved wheel. The rotating wheel and the grooved wheel are rotatably connected to the cleaning tank. The lever is fixed on the rotating wheel and can be inserted into the groove of the grooved wheel and move within the groove to drive the grooved wheel to rotate. The grooved wheel is provided with a connecting assembly. When the mounting frame is located in the cleaning tank, the connecting assembly is used to coaxially connect the grooved wheel and the mounting frame. The rotation of the grooved wheel is used to drive the mounting frame to flip.

[0027] By adopting the above technical solution, when the mounting frame, carrying the screen, enters the cleaning tank and the screen faces the cleaning assembly, the mounting frame reaches the connecting assembly. At this point, the connecting assembly coaxially connects the grooved wheel to the mounting frame, driving the rotating wheel to rotate. This causes the pusher block to insert into the groove of the grooved wheel. Because the pusher block moves in a circle around the center of the rotating wheel, it drives the grooved wheel to rotate 90°. Under the drive of the connecting assembly, the mounting frame rotates 90° synchronously, thus making the mounting frame vertical, facilitating the cleaning assembly to wash away impurities from the screen. Subsequently, the rotating wheel continues to drive the grooved wheel to rotate again, causing the mounting frame, carrying the screen, to rotate another 90°. At this time, the screen flips over, so that the side that was originally facing the cleaning assembly is now facing away from the cleaning assembly, facilitating the cleaning assembly to clean the screen from all angles.

[0028] Optionally, the connecting assembly includes a push cylinder and a positioning rod. The push cylinder is mounted on the working frame, and the positioning rod is connected to the mounting frame via a connecting spring. The positioning rod is coaxial with the mounting frame, and a gear is fixedly sleeved on the positioning rod. The grooved wheel has a toothed groove at its center, and the gear can be fitted into the toothed groove. The output shaft of the push cylinder is inserted into the toothed groove, and the output end of the push cylinder can abut against the positioning rod to drive the positioning rod to move towards the center of the mounting frame.

[0029] By adopting the above technical solution, when the mounting frame enters the cleaning tank, the positioning rod abuts against the inner wall of the cleaning tank, causing the positioning rod to be compressed and the connecting spring to contract, thus embedding the positioning rod in the mounting frame. When the mounting frame reaches the ratchet, the positioning rod aligns with the tooth groove, meaning the positioning rod separates from the inner wall of the cleaning tank. At this point, the connecting spring returns to its original deformation, allowing the positioning rod to insert into the tooth groove. Simultaneously, the gear is inserted into the tooth groove, and the inner wall of the tooth groove fits against the side wall of the gear, thereby restricting the gear's self-rotation within the tooth groove. Consequently, when the ratchet rotates, the inner wall of the tooth groove pushes against the gear, causing them to rotate synchronously, thus achieving the flipping of the mounting frame.

[0030] After the mounting frame is flipped over, the push cylinder is activated, causing the output end of the push cylinder to pass through the tooth groove and move towards the mounting frame, thereby pushing the positioning rod to move and the positioning rod to push out of the tooth groove. Then, the moving component is activated to drive the mounting frame to move, thereby removing the cleaned screen from the cleaning box.

[0031] Optionally, the fixing plate is fixed with a linkage rod, which is arranged along the width direction of the work frame, and the end of the linkage rod is rotatably connected to the mounting frame. A clamping plate is fixed on the linkage rod, which is arranged along the length direction of the linkage rod. The clamping plate and the fixing plate are located on opposite sides of the mounting frame. An abutment plate is fixed on the clamping plate, which is arranged along the length direction of the clamping plate and perpendicular to the clamping plate. When the fixing plate abuts against the screen, the clamping plate is inclined relative to the fixing plate. Both the fixing plate and the clamping plate are equipped with electromagnets, which can be attracted to the screen.

[0032] By adopting the above technical solution, in the initial state, the mounting frame is horizontal, with the support plate and fixing plate facing upwards. The screen is placed on the support plate, and the fixing plate abuts against the side wall of the screen. Activating the electromagnet in the fixing plate causes the screen to adhere to it, achieving a fixed connection between the screen and the fixing plate. The electromagnet prevents the screen from falling off the mounting frame when it is flipped in the cleaning tank. At this time, the fixing plate is vertical, while the clamping plate and the fixing plate are not on the same straight line. The linkage rod fixes the fixing plate and the clamping plate, thus making the clamping plate tilted relative to the vertical line, i.e., the two clamping plates are in an open state.

[0033] Once the mounting frame enters the cleaning chamber, the flipping assembly causes it to flip over, so that the originally upward-facing fixed plate now faces downwards, and the two clamping plates open upwards. After cleaning, the mounting frame, along with the downward-facing screen, is removed from the cleaning chamber. A new screen is then placed on the mounting frame, pressing against the abutment plate and bringing it to a horizontal position. This causes the clamping plates to rotate to a vertical position. The rotation of the clamping plates causes the linkage rod to rotate synchronously, gradually tilting the fixed plate and opening the two clamping plates.

[0034] At the same time, the power supply to the electromagnet in the fixing plate is cut off, while the electromagnet in the clamping plate is activated, allowing the fixing plate to separate from the screen. This causes the screen to lose its fixation and be unloaded under gravity. Meanwhile, the screen above is fixed to the mounting frame by the attraction of the electromagnet in the clamping plate.

[0035] Similarly, after the screen held by the clamping plate is facing downwards, a new screen is placed between the support plates, fixing the screen above with the fixing plate. The clamping plate is then opened, and the above steps are repeated, achieving simultaneous loading and unloading. For a single mounting frame, loading and unloading can be achieved simultaneously. For two mounting frames, while one mounting frame is being cleaned, the other is being loaded and unloaded. This allows the entire device to perform the cleaning, loading, and unloading processes synchronously, achieving full-station operation and further improving the efficiency of cleaning multiple screens.

[0036] Optionally, the work frame is equipped with two lifting cylinders, which are located on both sides of the cleaning tank. When one of the mounting frames is in the cleaning tank, the other mounting frame is located directly below one of the lifting cylinders. The output end of the lifting cylinder is equipped with an electromagnetic ring, and the mesh frame can be fixed on the electromagnetic ring.

[0037] By adopting the above technical solution, during cleaning, the screen is always installed above the mounting frame. The mounting frame, carrying the uncleaned screen, enters the cleaning tank facing upwards. Then, under the action of the flipping component, the cleaned screen emerges facing downwards, thus clearing the area above the mounting frame each time it is loaded. The screen to be cleaned is adsorbed onto the electromagnetic ring. During installation, the lifting cylinder moves downwards, bringing the screen to the mounting frame. The electromagnetic ring is then de-energized, allowing the screen to be placed on the mounting frame. This eliminates the need for manual operation when loading the screen; the operator only needs to support the screen being unloaded.

[0038] Optionally, the cleaning assembly includes a water tank and several nozzles. The water tank has an upward-facing opening and is located at the bottom of the cleaning tank. The nozzles are located at the top of the cleaning tank. The water tank is connected to the nozzles via a circulation pipe.

[0039] By adopting the above technical solution, when the screen enters the cleaning tank, several nozzles are all facing the screen. Water is drawn from the water tank using the circulation pipe, so that the nozzles rinse the screen below. After the water flows through the screen, it will all fall into the water tank, realizing the recycling of water.

[0040] Optionally, the cleaning tank has a cleaning roller at its opening, and a sponge is fitted onto the cleaning roller.

[0041] By adopting the above technical solution, when the screen enters and exits the cleaning tank, it slides off the cleaning roller. The sponge on the cleaning roller contacts the screen, performing a rough cleaning of impurities. The screen then enters the cleaning tank for a fine wash with water. When the cleaned screen is removed from the cleaning tank, it moves on the sponge, which absorbs some of the screen's surface, effectively wiping it and preventing water droplets from carrying dust and leaving residue.

[0042] In summary, this application includes at least one of the following beneficial effects:

[0043] 1. When the nickel mesh is pressed onto the polyester mesh, the nickel mesh is pre-compensated based on the tested inner arc angle, meaning the mesh lines converge towards the center of the nickel mesh. After the nickel mesh is installed on the polyester mesh, the initial mesh is placed above the true frame. By operating the top of the true frame, the true frame is pressed firmly against the polyester mesh. Simultaneously, the nickel mesh expands under tension, causing the mesh lines to become straighter, improving the straightness of the nickel mesh after screen preparation, thereby improving the screen quality.

[0044] 2. After the installation frame with the screen enters the cleaning box, another installation frame moves out of the cleaning box, and a new screen is placed in the installation frame that moves out later. After the previous screen is cleaned, the installation frame with the screen is reset and removed from the cleaning box, while another installation frame with a new screen enters the cleaning box again. During this process, the screen is cleaned while the next screen is being fed, so that each movement of the moving component can bring a screen into the cleaning box for cleaning, thus making the cleaning work continuous and improving the efficiency of cleaning multiple screens.

[0045] 3. When the screen is placed between the two fixed plates, the two clamps open, allowing the screen to be unloaded. Similarly, when the clamps face upwards and the screen is placed between the two clamps, the two fixed plates below will open. Thus, for a single mounting frame, unloading can be achieved simultaneously with loading. For two mounting frames, while one mounting frame is being cleaned, the other mounting frame is being loaded and unloaded. This allows the entire device to perform the cleaning, loading, and unloading processes simultaneously, achieving full-station operation and further improving the efficiency of cleaning multiple screens. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the cleaning device in the solar printing nickel screen fabrication process of this application embodiment;

[0047] Figure 2 This is a structural diagram of the cleaning component and the moving component;

[0048] Figure 3 This is a structural diagram of the mounting frame;

[0049] Figure 4 A schematic diagram of the structure on the fixed components and linkage rods;

[0050] Figure 5 This is a structural diagram illustrating the connection relationship between the flip component and the connecting component;

[0051] Figure 6 This is a schematic diagram of the flip component.

[0052] In the diagram: 10. Cleaning device; 11. Cleaning tank; 12. Moving component; 121. Moving rod; 122. Moving motor; 123. Connecting rod; 20. Mounting frame; 21. Mounting bracket; 22. Linkage rod; 221. Clamping plate; 222. Abutment plate; 30. Fixing component; 31. Fixing plate; 32. Support plate; 40. Tilting component; 41. Rotating wheel; 42. Pulley; 43. Grooved wheel; 431. Gear; 50. Connecting component; 51. Pushing cylinder; 52. Positioning rod; 521. Gear; 522. Connecting spring; 60. Lifting cylinder; 61. Electromagnetic ring; 70. Cleaning component; 71. Water tank; 72. Nozzle; 73. Circulation pipe; 80. Cleaning roller; 81. Sponge; 90. Working frame. Detailed Implementation

[0053] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0054] This application discloses a process for preparing a solar-powered printing nickel screen. The process includes the following steps:

[0055] S1. Lay the polyester mesh on the dummy frame to form a preliminary screen;

[0056] S2. Place the release film in the center on the preliminary screen, cover the release film with PE film, and use a hot melt machine to heat it at 135°C for 8 seconds to make the PE film adhere to the release film on the polyester screen. During this process, the heating element of the hot melt machine can be a resistance wire or an infrared radiation sheet, both of which can quickly heat up to the target temperature and have good temperature control accuracy.

[0057] S3. Cover the PE film with nickel mesh. At this time, the nickel mesh is in a contracted and bent state. Then, fix it with a hot melt machine at a temperature of 140°C for 140 seconds to make the nickel mesh adhere stably to the surface of the PE film.

[0058] S4. Use a cutting tool to cut the polyester mesh in the middle along the edge of the release film, and then remove the release film. At this time, a smooth transition step structure will naturally form between the PE film and the nickel mesh.

[0059] S5. Place the real frame directly below the fake frame, and gradually adjust the tension of the polyester mesh with the help of the lifting mechanism until the predetermined standard is reached. After completion, use glue to firmly bond the mesh frame and the polyester mesh together. After the glue has completely cured, remove the finished mesh. Then monitor the finished mesh and fine-tune the straightness of the nickel mesh yarn. At this time, the straightness of the nickel mesh yarn on the finished mesh is relatively high.

[0060] The lifting mechanism mentioned here mainly consists of a base platform, a column support, and a hand-cranked fine-tuning knob with fine scale markings. It is recommended that the base be made of marble to ensure sufficient flatness and load-bearing capacity. At the same time, the fine-tuning knob is equipped with a worm gear transmission system to facilitate precise control of various parameter settings.

[0061] S6. After cleaning the assembled and fixed screen, perform a second pressing and sealing process with the pre-prepared PM film.

[0062] S7. Apply the photosensitive emulsion evenly around the nickel mesh, take the corresponding pattern film for comparison to complete the exposure, and during the development process, rinse the screen to remove the photosensitive emulsion in the unexposed areas and allow the photosensitive emulsion in the exposed areas to solidify.

[0063] Reference Figure 1 and Figure 2 The cleaning step in step 6 can be carried out efficiently and in a standardized manner using a specially designed work frame 90 in conjunction with an automated cleaning device 10. This device mainly consists of two parts: a cleaning tank 11 and a moving component 12. The cleaning tank 11 is fixedly placed on the work frame 90 and opens to both ends to facilitate the entry and exit of the screen. A horizontally arranged cleaning roller 80 is provided at the opening of the cleaning tank 11. The cleaning roller 80 is wrapped with a sponge 81. When the screen moves in and out, it slides on the sponge 81 to clean and wipe the screen.

[0064] Reference Figure 1 and Figure 2 The cleaning tank 11 is equipped with a cleaning component 70, which includes a water tank 71 and several nozzles 72. When the screen enters the cleaning tank 11, the nozzles 72 are all facing the screen. Water is drawn from the water tank 71 by the circulation pipe 73, so that the nozzles 72 rinse the screen below. After the water flows through the screen, it will all fall into the water tank 71, realizing the recycling of water.

[0065] Reference Figure 1 and Figure 2 A cleaning roller 80 is installed at the opening of the cleaning tank 11. The cleaning roller 80 is horizontally mounted on the cleaning tank 11, with its end fixed to the work frame 90. A sponge 81 is sleeved on the cleaning roller 80. When the screen enters or exits the cleaning tank 11, the screen slides off the cleaning roller 80. The sponge 81 on the cleaning roller 80 contacts the screen, performing a rough cleaning of impurities on the screen. Then, the screen enters the cleaning tank 11 for a fine wash with water. When the cleaned screen is removed from the cleaning tank 11, it moves on the sponge 81. The sponge 81 can absorb some of the screen, wiping it to prevent water droplets from carrying dust and leaving residue on the screen.

[0066] Reference Figure 1 and Figure 2The moving component 12 includes a horizontal guide rail that runs the entire length of the machine, along with a matching power drive unit. Together, they drive the dedicated mounting frames 20, which are loaded with items to be washed, to move smoothly between various designated locations. Specifically, the moving component 12 includes a moving rod 121, a moving motor 122, and a connecting rod 123. The openings on both sides of the washing tank 11 are located along the length of the work frame 90. The movable rod 121 is arranged along the length of the work frame 90. The end of the movable rod 121 is rotatably connected to the work frame 90. The movable motor 122 is mounted on the work frame 90, and the output end of the movable motor 122 is coaxially fixed with one end of the movable rod 121 to drive the movable rod 121 to rotate. The connecting rod 123 is sleeved on the movable rod 121 and threadedly connected to the movable rod 121. The end of the connecting rod 123 is slidably connected to the work frame 90. The rotation of the movable rod 121 drives the connecting rod 123 to move along the length of the movable rod 121. The two mounting frames 20 are connected by the mounting bracket 21, and the connecting rod 123 is fixed to the mounting bracket 21.

[0067] When the screen is placed on the mounting frame 20, the moving motor 122 is started, which drives the moving rod 121 to rotate. Since the moving rod 121 is threadedly connected to the connecting rod 123, the connecting rod 123 is driven to move along the length of the moving rod 121, which in turn drives the mounting frame 21 and the two mounting frames 20 to move along the length of the work frame 90. By using the forward and reverse rotation of the moving rod 121, the mounting frame 20 can carry the screen into and out of the cleaning box 11, which is convenient to operate.

[0068] Reference Figure 3 and Figure 4 To fix the screen on the mounting frame 20, a fixing component 30 is provided on the mounting frame 20. The fixing component 30 includes two fixing plates 31 arranged opposite to each other. Two linkage rods 22 are provided on the mounting frame 20 along the width direction of the work frame 90. The two linkage rods 22 are located at the two side edges of the mounting frame 20 respectively. The fixing plates 31 are fixed on the linkage rods 22. A support plate 32 is also fixed on the linkage rods 22. The support plate 32 is perpendicular to the fixing plate 31, forming an L-shaped rod.

[0069] The linkage rod 22 is bounded by the mounting frame 20, and another L-shaped rod is fixed thereon. The long side of the other L-shaped rod is the clamping plate 221, and the short side is the abutment plate 222. Both are arranged along the width direction of the work frame 90. The clamping plate 221 and the fixing plate 31 are not on the same straight line, so the abutment plate 222 and the support plate 32 are not parallel.

[0070] When the screen is placed on the support plate 32, the fixing plate 31 abuts against the side wall of the screen. At this time, the clamping plate 221 is inclined relative to the fixing plate 31 and opens away from the screen. Similarly, when the screen is placed on the abutting plate 222, the clamping plate 221 abuts against the side wall of the screen, and the two fixing plates 31 are open. To increase the stability of the screen placed between the two fixing plates 31 or the two clamping plates 221, electromagnets are embedded in both the fixing plates 31 and the clamping plates 221. When the electromagnets are energized, they can attract the screen.

[0071] Reference Figure 1 and Figure 5 To enhance the thoroughness of screen cleaning in the cleaning tank 11, a flipping assembly 40 is provided in the cleaning tank 11 to drive the rotation of the mounting frame 20. The mounting frame 21 includes a straight rod and two frames, with the two mounting frames 20 corresponding one-to-one with the frames. The central axis of the mounting frames 20, which is arranged along the width direction of the work frame 90, is rotatably connected to the frames via a rotating shaft. The flipping assembly 40 includes a rotating wheel 41, a lever 42, and a grooved wheel 43. Both the rotating wheel 41 and the grooved wheel 43 are rotatably connected to the cleaning tank 11. A motor is bolted to the outer wall of the cleaning tank 11, and the output end of the motor is coaxially fixed to the rotating wheel 41 to drive the rotating disc to rotate. The lever 42 is fixed to the rotating wheel 41 and can be inserted into the groove of the grooved wheel 43 and move within the groove of the grooved wheel 43 to drive the grooved wheel 43 to rotate.

[0072] Reference Figure 2 and Figure 5 The grooved wheel 43 is connected to the mounting frame 20 via a connecting assembly 50. The connecting assembly 50 includes a push cylinder 51 and a positioning rod 52. The push cylinder 51 is mounted on the work frame 90. The positioning rod 52 is connected to the mounting frame 20 via a connecting spring 522. The end of the positioning rod 52 near the inner wall of the cleaning tank 11 is hemispherical. The positioning rod 52 is coaxial with the mounting frame 20. A gear 521 is fixedly sleeved on the positioning rod 52. A sleeve is coaxially fixed on the grooved wheel 43. The sleeve passes through the cleaning tank 11 and can rotate on the cleaning tank 11.

[0073] Reference Figure 5 and Figure 6 A disc is coaxially fixed on the sleeve. A toothed groove 431 is provided on the side wall of the disc near the center of the cleaning box 11. The toothed groove 431 is coaxial with the sleeve. A gear 521 can be fitted into the toothed groove 431. The output shaft of the push cylinder 51 is inserted into the toothed groove 431, and the output end of the push cylinder 51 can be abutted by the positioning rod 52 to drive the positioning rod 52 to move towards the center of the mounting frame 20.

[0074] When the mounting frame 20 enters the cleaning tank 11, the hemispherical end of the positioning rod 52 abuts against the inner wall of the cleaning tank 11, causing the positioning rod 52 to be subjected to oblique pressure, thus moving the positioning rod 52. The connecting spring 522 contracts, and the positioning rod 52 is embedded in the mounting frame 20. When the mounting frame 20 reaches the ratchet, the positioning rod 52 aligns with the tooth groove 431, that is, the positioning rod 52 separates from the inner wall of the cleaning tank 11. At this time, the connecting spring 522 returns to its original deformation, allowing the positioning rod 52 to be inserted into the tooth groove 431. At the same time, the gear 521 is inserted into the tooth groove 431, and the inner wall of the tooth groove 431 fits against the side wall of the gear 521, thereby restricting the rotation of the gear 521 in the tooth groove 431. As a result, when the grooved wheel 43 rotates, the inner wall of the tooth groove 431 pushes against the gear 521 to rotate synchronously, realizing the flipping of the mounting frame 20. This allows the nozzle 72 to rinse the screen from all directions.

[0075] Reference Figure 5 and Figure 6 After the mounting frame 20 is flipped over, the push cylinder 51 is activated, causing the output end of the push cylinder 51 to pass through the tooth groove 431 and move towards the mounting frame 20, thereby pushing the positioning rod 52 to move and the positioning rod 52 to push out of the tooth groove 431. Then the moving component 12 is activated to drive the mounting frame 20 to move, thereby removing the cleaned screen from the cleaning box 11.

[0076] The mounting frame 20 is a fixed-point rotation. During the movement, a hole for the gear 521 to be inserted can also be opened on the mounting bracket 21. When the positioning rod 52 abuts against the inner wall of the cleaning tank 11, the positioning rod 52 is in a retracted state, thereby driving the gear 521 to be inserted into the hole on the mounting bracket 21, so that the mounting frame 20 remains in a horizontal state during the movement.

[0077] Initially, the mounting frame 20 is horizontal, with the support plate 32 and the fixing plate 31 facing upwards. The screen is placed on the support plate 32, and the fixing plate 31 abuts against the side wall of the screen. Activating the electromagnet in the fixing plate 31 causes the screen to adhere to the fixing plate 31, thus achieving a fixed connection between the screen and the fixing plate 31. The electromagnet prevents the screen from falling off the mounting frame 20 when it is flipped in the cleaning tank 11. At this time, the fixing plate 31 is vertical, while the clamping plate 221 is not on the same straight line as the fixing plate 31. The linkage rod 22 fixes the fixing plate 31 to the clamping plate 221, causing the clamping plate 221 to be tilted relative to the vertical line, i.e., the two clamping plates 221 are open.

[0078] Reference Figure 1 and Figure 4When the mounting frame 20 enters the cleaning tank 11, the flipping component 40 drives the mounting frame 20 to flip over, so that the originally upward-facing fixed plate 31 becomes downward-facing, and the two clamping plates 221 open upward-facing. After cleaning, the mounting frame 20, with the downward-facing screen, is removed from the cleaning tank 11. At this time, a new screen is placed on the mounting frame 20, that is, the new screen abuts against the abutting plate 222, thereby pressing the abutting plate 222, so that the abutting plate 222 is in a horizontal state, that is, the clamping plate 221 rotates to a vertical state. The rotation of the clamping plate 221 causes the linkage rod 22 to rotate synchronously, thereby causing the fixed plate 31 to gradually tilt, so that the two clamping plates 221 open.

[0079] At the same time, the power supply to the electromagnet in the fixing plate 31 is cut off, and the electromagnet in the clamping plate 221 is activated, so that the fixing plate 31 can be separated from the screen, and the screen loses the fixation of the fixing plate 31 and is unloaded under the action of gravity. The screen above is fixed on the mounting frame 20 by the attraction of the electromagnet in the clamping plate 221.

[0080] Similarly, after the screen held by clamp 221 is facing downwards, a new screen is placed between support plates 32, and the screen above is fixed by fixing plate 31. Clamp 221 is then opened, and the above steps are repeated, achieving simultaneous loading and unloading. For a single mounting frame 20, loading and unloading can be achieved simultaneously. For two mounting frames 20, while one mounting frame 20 is being cleaned, the other mounting frame 20 is being loaded and unloaded. This allows the entire device to perform the cleaning, loading, and unloading processes synchronously, thus achieving full-station operation and further improving the efficiency of cleaning multiple screens.

[0081] Reference Figure 1 During cleaning, the screen is always installed above the mounting frame 20, meaning the mounting frame 20, carrying the unwashed screen, enters the cleaning tank 11 with the screen facing upwards. Then, under the action of the flipping component 40, the cleaned screen emerges facing downwards, thus clearing the area above the mounting frame 20 each time it is loaded. To facilitate loading, two lifting cylinders 60 are mounted on the work frame 90 via brackets. The two lifting cylinders 60 are located on opposite sides of the cleaning tank 11. When one mounting frame 20 is in the cleaning tank 11, the other mounting frame 20 is directly below one of the lifting cylinders 60. An electromagnetic ring 61 is fixed to the output end of the lifting cylinder 60, which attracts the screen to be cleaned. During installation, the lifting cylinder 60 moves downwards, carrying the screen, causing the electromagnetic ring 61 to de-energize, thus placing the screen onto the mounting frame 20. This eliminates the need for manual operation when loading the screen; the operator only needs to support the screen being unloaded.

[0082] The implementation principle of the solar printing nickel mesh screen preparation process in this application embodiment is as follows: First, the dummy frame polyester mesh is pressed together with the PE film. Then, the nickel mesh is placed in the center relative to the PE film and pressed together. At this time, the nickel mesh is in a contracted and bent state. Then, the polyester mesh in the middle is cut along the edge of the release film using a cutting tool, and then the release film is removed. At this time, a smooth transition step-like structure will naturally form between the PE film and the nickel mesh. Next, the real frame is placed directly below the dummy frame, and the tension of the polyester mesh is gradually adjusted with the help of a lifting mechanism until the predetermined standard is reached. The frame and the polyester mesh are tightly bonded together with glue, and the finished screen is removed after the glue has completely cured.

[0083] The nickel mesh on the finished screen is then monitored and its straightness is fine-tuned. This is achieved by cutting the edges of the screen to release tension in the nickel mesh until the mesh lines are nearly straight, improving screen quality. After inspection, the screen is cleaned and laminated with a PM film. Finally, photosensitive emulsion is evenly applied around the mesh, and exposure is completed by comparing it with a corresponding pattern film. The photosensitive emulsion in the unexposed areas is then removed, allowing the exposed areas to cure, thus completing screen preparation.

[0084] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A process for preparing a solar-printed nickel screen printing plate, characterized in that, Includes the following steps: S1. Lay the polyester mesh on the dummy frame to form a preliminary screen; S2. Place the release film in the center on the preliminary screen, cover the release film with PE film, and use hot melt to make the PE film adhere the release film to the polyester screen. S3. Cover the PE film with nickel mesh. At this time, the nickel mesh is in a contracted and bent state. Then, heat melt it again to fix the nickel mesh on the PE film. S4. Cut the polyester mesh in the middle along the edge of the release film and remove the release film. At this time, a smooth step is formed between the PE film and the polyester mesh. S5. Place the real frame directly below the fake frame, and use the real frame to perform a top frame operation on the polyester mesh, so that the nickel mesh yarn is stressed and expanded to obtain stable straightness. Fix the polyester mesh on the real frame, and cut the polyester mesh around the real frame so that the polyester mesh forms a screen on the real frame. S6. After cleaning the screen, press it together with the PM film; S7. Apply the photosensitive emulsion evenly around the nickel screen mesh, take the corresponding pattern film for comparison to complete the exposure, and during the development process, rinse the screen to remove the photosensitive emulsion in the unexposed areas and allow the photosensitive emulsion in the exposed areas to solidify. In S6, the screen is cleaned by a cleaning device (10) mounted on a work frame (90). The cleaning device (10) includes a cleaning box (11) and a moving component (12). The cleaning box (11) is fixed on the work frame (90). The two ends of the cleaning box (11) along the length of the work frame (90) are open. The cleaning box (11) is equipped with a cleaning component (70) for cleaning the screen. The moving component (12) is slidably connected to the work frame (90). The moving component (12) can move along the length of the work frame (90) in the cleaning box (11). The two ends of the moving component (12) along the moving direction are equipped with mounting frames (20) for mounting the screen. The two mounting frames (20) are alternately aligned with the cleaning component (70), and the mounting frames (20) can be moved out of the cleaning box (11) from the opening of the cleaning box (11). The cleaning tank (11) is provided with a flipping assembly (40), which includes a rotating wheel (41), a lever (42), and a grooved wheel (43). The rotating wheel (41) and the grooved wheel (43) are rotatably connected to the cleaning tank (11). The lever (42) is fixed on the rotating wheel (41) and can be inserted into the groove of the grooved wheel (43) and move in the groove of the grooved wheel (43) to drive the grooved wheel (43) to rotate. The grooved wheel (43) is provided with a connecting assembly (50). When the mounting frame (20) is located in the cleaning tank (11), the connecting assembly (50) is used to coaxially connect the grooved wheel (43) and the mounting frame (20). The rotation of the grooved wheel (43) is used to drive the mounting frame (20) to flip.

2. The process for preparing a solar-powered printing nickel screen according to claim 1, characterized in that, The moving component (12) includes a moving rod (121), a moving motor (122), and a connecting rod (123). The moving rod (121) is arranged along the length of the work frame (90), and the end of the moving rod (121) is rotatably connected to the work frame (90). The moving motor (122) is mounted on the work frame (90), and the output end of the moving motor (122) is coaxially fixed with one end of the moving rod (121) to drive the moving rod (121). 1) Rotation, the connecting rod (123) is sleeved on the moving rod (121) and threadedly connected to the moving rod (121). The end of the connecting rod (123) is slidably connected to the work frame (90). The moving rod (121) rotates to drive the connecting rod (123) to move along the length direction of the moving rod (121). The two mounting frames (20) are connected by the mounting bracket (21). The connecting rod (123) is fixed to the mounting bracket (21).

3. The process for preparing a solar-printed nickel screen printing plate according to claim 1, characterized in that, The mounting frame (20) is provided with a fixing component (30) for fixing the screen. The fixing component (30) includes two fixing plates (31) arranged opposite to each other. The fixing plates (31) are arranged along the width direction of the work frame (90). A support plate (32) is fixed on the fixing plate (31). The support plate (32) is arranged along the length direction of the fixing plate (31) and is perpendicular to the fixing plate (31). When the screen is placed on the support plate (32), the fixing plate (31) abuts against the side wall of the screen.

4. The process for preparing a solar-powered printing nickel screen according to claim 1, characterized in that, The connecting assembly (50) includes a push cylinder (51) and a positioning rod (52). The push cylinder (51) is mounted on the work frame (90). The positioning rod (52) is connected to the mounting frame (20) via a connecting spring (522). The positioning rod (52) is coaxial with the mounting frame (20). A gear (521) is fixedly sleeved on the positioning rod (52). A tooth groove (431) is provided at the center of the grooved wheel (43). The gear (521) can be fitted into the tooth groove (431). The output shaft of the push cylinder (51) is inserted into the tooth groove (431), and the output end of the push cylinder (51) can abut against the positioning rod (52) to drive the positioning rod (52) to move towards the center of the mounting frame (20).

5. The process for preparing a solar-powered printing nickel screen according to claim 3, characterized in that, The fixed plate (31) is fixed with a linkage rod (22), which is arranged along the width direction of the work frame (90), and the end of the linkage rod (22) is rotatably connected to the mounting frame (20). A clamping plate (221) is fixed on the linkage rod (22), which is arranged along the length direction of the linkage rod (22). The clamping plate (221) and the fixed plate (31) are located on opposite sides of the mounting frame (20). An abutting plate (222) is fixed on the clamping plate (221), which is arranged along the length direction of the clamping plate (221) and perpendicular to the clamping plate (221). When the fixed plate (31) abuts against the screen, the clamping plate (221) is inclined relative to the fixed plate (31). Both the fixed plate (31) and the clamping plate (221) are provided with electromagnets, which can be attracted to the screen.

6. The process for preparing a solar-powered printing nickel screen according to claim 1, characterized in that, The work frame (90) is equipped with two lifting cylinders (60), which are located on both sides of the cleaning tank (11). When one of the mounting frames (20) is in the cleaning tank (11), the other mounting frame (20) is located directly below one of the lifting cylinders (60). The output end of the lifting cylinder (60) is equipped with an electromagnetic ring (61), and the screen can be fixed on the electromagnetic ring (61).

7. The process for preparing a solar-powered printing nickel screen according to claim 1, characterized in that, The cleaning assembly (70) includes a water tank (71) and several nozzles (72). The water tank (71) has an upward opening and is located at the bottom of the cleaning tank (11). The nozzles (72) are located at the top of the cleaning tank (11). The water tank (71) is connected to the nozzles (72) through a circulation pipe (73).

8. The process for preparing a solar-powered printing nickel screen according to claim 1, characterized in that, The cleaning tank (11) is provided with a cleaning roller (80) at the opening, and a sponge (81) is sleeved on the cleaning roller (80).

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