Automatic cleaning water line for silk screen plate before demolding treatment

Abstract

The application discloses a silk screen plate demolding pretreatment automatic cleaning flow line, which comprises a hoisting mechanism for the screen plate, a soaking tank for removing the solidified photosensitive film layer of the screen plate, a conveyor, a water washing mechanism and a blow-drying mechanism arranged in the middle of the conveyor, and the hoisting mechanism comprises a basket for carrying the screen plate and an electric hoist for hoisting and conveying the basket; the silk screen plate regeneration reuse pretreatment demolding cleaning automatic flow line equipment of the application is not only labor-saving and energy-saving, but also effectively solves the problems of the adaptation of the up-and-down soaking tank conveying device, the time and site optimization and use encountered in the automatic equipment scheme of the silk screen plate regeneration reuse pretreatment, perfectly solves the problems of the up-and-down grabbing of the screen plate on the horizontal flow line and the problem that the screen plate screen gauze cannot be touched and damaged in the conveying process, and achieves the efficient purpose of saving labor and water of the silk screen plate demolding pretreatment automation equipment.

Description

Technical Field

[0001] This invention relates to the field of screen printing technology, specifically to an automated cleaning line for pre-treatment of screen printing stencils before demolding. Background Technology

[0002] In the flat screen printing industry, screen printing stencils are an indispensable process device. After a screen printing stencil completes a screen printing pattern, if another printing pattern needs to be changed, the previous photosensitive film layer must be removed, a new photosensitive paste or a new photosensitive film layer must be applied, and a new printing pattern must be exposed. This is called screen recycling.

[0003] In the current wire mesh manufacturing industry, the stripping and cleaning process for wire mesh recycling is mainly done manually, which is labor-intensive, inefficient, and cannot meet the growing demand for large-scale production. Summary of the Invention

[0004] The purpose of this invention is to provide an automated cleaning line for the pretreatment of screen printing stencils before delamination, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic cleaning line for pretreatment of screen printing stencils before decoction, comprising a lifting mechanism for the stencil, an immersion tank for removing the cured photosensitive film layer from the stencil, a conveyor, and a washing mechanism and a drying mechanism disposed in the middle of the conveyor. The lifting mechanism includes a basket for supporting the stencil and an electric hoist for lifting and conveying the basket. The immersion tank is located in the middle of the basket gantry truss, and a drain trough is provided on one side of the immersion tank. The conveyor includes a support frame and a conveyor for transporting the stencil. The conveyor has a rubber-coated shaft for the plate, and both ends of the conveyor are equipped with robotic arms for gripping the mesh plate. The washing mechanism includes a washing section frame, and the drying mechanism is located on one side of the washing section frame. The drying mechanism includes a drying section frame, and the conveyor passes through the middle of the washing section frame and the drying section frame. Inside the washing section frame and above and below the conveyor, there are a first washing, a second washing, and a third washing. Inside the drying section frame and above and below the conveyor, there are an upper air curtain machine and a lower air curtain machine for drying the mesh plate.

[0006] Preferably, the lifting mechanism further includes a gantry truss for the basket, the electric hoist is installed on the transverse conveying direction of the gantry truss for the basket, the basket includes a basket base frame, the middle of the basket base frame is fixedly connected to a column angle through the base frame angle, the middle of the column angle is fixedly connected to a basket column, the basket column and the basket base frame are provided with diagonal bracing, the diagonal bracing includes a lower diagonal bracing plate and an upper diagonal bracing plate, the two ends of the basket base frame are symmetrically fixedly connected to the lower diagonal bracing plate about the basket column, the outer side of the lower diagonal bracing plate is fixedly connected to a diagonal bracing basket, the middle of the basket column is fixedly connected to the upper diagonal bracing plate, a rubber-coated steel wire rope is installed on one side of the upper diagonal bracing plate, and the rubber-coated steel wire rope is connected to the diagonal bracing basket.

[0007] Preferably, the top of the suspended platform column is fixed to the suspended platform beam via a crossbeam corner plate, the top of the suspended platform base frame is provided with a bottom truss, the middle of the bottom truss is provided with multiple bottom truss crossbars, the ends of the bottom truss are rotatably connected to a latch via a pivot, a tension spring is sleeved on the outside of the pivot, and the two ends of the tension spring are respectively connected to the bottom truss and the latch.

[0008] Preferably, a reflux tank is provided on one side of the soaking tank, and an overflow pipe is connected between the soaking tank and the reflux tank. A replenishment pump for pumping out water from the reflux tank is installed at the bottom of the reflux tank, and the output end of the replenishment pump is connected to the soaking tank through a replenishment pipe.

[0009] Preferably, the drain groove is provided with a release strut in the middle.

[0010] Preferably, a wheel-rail channel steel is fixedly connected inside the bracket, and the rubber-coated shaft is rotatably mounted inside the wheel-rail channel steel via a transmission bearing. A bevel gear is fixedly connected to the output end of the rubber-coated shaft, a main shaft bearing is installed on the side of the wheel-rail channel steel, a transmission main shaft is installed in the middle of the main shaft bearing, and a drive bevel gear that meshes with the bevel gear is provided on the outer side of the transmission main shaft. A reduction motor for driving the transmission main shaft is installed inside the bracket, and a guide wheel and a bouncing wheel are rotatably connected to the side of the wheel-rail channel steel.

[0011] Preferably, the conveyor is provided with an inlet gantry and an outlet gantry at both ends. The grabbing plate manipulator is movably mounted on the inlet gantry and the outlet gantry, respectively. The grabbing plate manipulator includes a lifting rack, a lifting part for driving the lifting rack to rise and fall, and a moving part for driving the lifting rack to move. A hand frame I-beam is fixedly connected to the bottom of the lifting rack. A hand frame stringer is fixedly connected to the bottom of the hand frame I-beam. A hand frame crossbar is fixedly connected to the middle of the hand frame stringer. A claw support is fixedly connected to the end of the hand frame stringer. A claw cylinder is fixedly connected to the bottom of the claw support. A limit spring is fixedly connected to the top of the claw cylinder. A hand frame pad is fixedly connected between the limit spring and the claw support. A clamping film is fixedly connected to the output end of the claw cylinder.

[0012] Preferably, a section cover is installed on the top of the washing section frame. Inside the washing section frame, above and below the conveyor, are stringer mounting brackets. A spray frame stringer is fixedly connected to the middle of each stringer mounting bracket. A slide rail slider is slidably connected to the outer side of the spray frame stringer. A spray pipe is fixedly connected to the outer side of the slide rail slider. A soft water pipe flange interface is fixedly connected to one side of the spray pipe. A flexible hose is connected to the outer side of the soft water pipe flange interface. A high-pressure nozzle is fixedly connected to the spray pipe facing the conveyor. A DC geared motor is fixedly connected to the outer side of the spray frame stringer. A motor waterproofing device is fixedly connected to the outer side of the DC geared motor. The DC geared motor output is connected to a reciprocating connecting rod via a cam. The reciprocating connecting rod is rotatably connected to the spray pipe via a connecting rod pin. A washing water tank is provided at the bottom of the drying section frame. A washing overflow pipe is installed inside the washing water tank. A high-pressure water pump is installed on one side of the washing water tank. A filter cartridge is provided on the outside of the high-pressure water pump. The washing water tank is divided into three water tanks by a partition. A No. 2 overflow pipe is provided between the corresponding water tanks of the second and third washing stages. A No. 3 overflow pipe is provided between the corresponding water tanks of the first and second washing stages. A No. 4 overflow pipe is provided on the side of the water tank below the first washing stage.

[0013] Preferably, the drying section frame is provided with a partition plate in the middle, and the inner wall of the drying section frame and the side of the partition plate are both fixed to the upper air curtain machine through brackets. The lower air curtain machine is fixed to the outer side of the partition plate and below the conveyor.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The automated production line equipment for pretreatment, stripping, and cleaning of screen printing stencils for recycling and reuse can completely replace the previous manual operation method, saving manpower and energy. It effectively solves the problems of adapting the conveying equipment for the immersion tank and optimizing the use of time and space encountered in the automated equipment scheme for screen printing stencil recycling and reuse. It perfectly solves the problems of needing to grab and drop the stencils on a horizontal production line and not allowing contact with or damage to the stencil mesh during the conveying process, thus achieving the high efficiency of saving manpower and water that an automated equipment for pretreatment of screen printing stencils for stripping should have. Attached Figure Description

[0015] Figure 1 This is a distribution diagram of the production line of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the suspended platform of the present invention;

[0017] Figure 3 This is a top view of the suspended basket of the present invention;

[0018] Figure 4 This is a schematic diagram of the drainage trough of the present invention;

[0019] Figure 5 This is a top view of the drain trough of the present invention;

[0020] Figure 6 This is a schematic diagram of the conveyor of the present invention;

[0021] Figure 7 This is a simplified transmission diagram of the conveyor of the present invention;

[0022] Figure 8 This is a top view of the gripper robot of the present invention.

[0023] Figure 9 This is a schematic diagram showing the position and structure of the claw cylinder of the present invention;

[0024] Figure 10 This is a cross-sectional view of the washing section frame of the present invention along the X-axis direction;

[0025] Figure 11 This is a cross-sectional view of the washing section frame of the present invention along the Y-axis direction;

[0026] Figure 12 This is a top view of the spray frame stringer of the present invention;

[0027] Figure 13 This is a schematic diagram of the internal structure of the drying section frame of the present invention;

[0028] Figure 14 This is a schematic diagram of the soaking tank of the present invention.

[0029] In the diagram: 1. Suspended platform; 11. Bottom truss; 111. Bottom truss crossbar; 12. Hook clamp; 121. Tension spring; 13. Suspended platform base frame; 131. Base frame angle; 14. Suspended platform column; 141. Column angle; 15. Diagonal brace; 151. Diagonal brace basket; 152. Rubber-coated steel wire rope; 153. Diagonal brace upper buckle plate; 154. Diagonal brace lower buckle plate; 16. Suspended platform crossbeam; 161. Crossbeam corner plate;

[0030] 2. Soaking tank; 21. Overflow pipe No. 1; 22. Return tank; 23. Replenishment pump; 24. Replenishment pipe;

[0031] 3. Drainage groove; 31. Unlocking strut;

[0032] 4. Suspended basket gantry truss; 41. Electric hoist; 42. Inbound gantry frame; 43. Outbound gantry frame;

[0033] 5. Mesh grabbing robot; 51. Scaffold stringers; 52. Scaffold crossbars; 53. Scaffold I-beams; 54. Claw gripper brackets; 55. Claw gripper cylinders; 56. Limiting springs; 57. Clamping sheets; 58. Scaffold pads;

[0034] 6. Wheel and rail channel steel; 61. Rubber-coated shaft; 62. Transmission bearing; 63. Bevel gear; 64. Guide wheel; 65. Bounce wheel; 66. Main shaft bearing; 67. Transmission main shaft; 68. Gear motor;

[0035] 7. Washing section frame; 701. First wash; 702. Second wash; 703. Third wash; 71. Spray pipe; 711. Spray frame stringers; 712. Slide rail slider; 713. High-pressure nozzle; 714. Reciprocating connecting rod; 715. DC geared motor; 716. Motor waterproof cover; 717. Connecting rod pin; 73. Soft water pipe flange interface; 731. Flexible hose; 74. High-pressure water pump; 75. Filter cartridge; 76. Washing overflow pipe; 761. Overflow pipe No. 2; 762. Overflow pipe No. 3; 763. Overflow pipe No. 4; 77. Stringer mounting bracket; 78. Section cover plate;

[0036] 8. Drying section frame; 81. Zone partition; 82. Support frame; 83. Upper air curtain machine; 84. Lower air curtain machine. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1-14 This invention provides a technical solution: an automatic cleaning line for pre-treatment of screen printing stencils before decoction, comprising a lifting mechanism for the stencil, an immersion tank 2 for removing the cured photosensitive film layer from the stencil, a conveyor, and a washing mechanism and a drying mechanism disposed in the middle of the conveyor. The lifting mechanism includes a basket 1 for supporting the stencil and an electric hoist 41 for lifting and conveying the basket 1. The immersion tank 2 is located in the middle of the basket gantry 4, and a drain trough 3 is provided on one side of the immersion tank 2. The conveyor includes a support frame and a rubber-coated shaft 61 installed inside the support frame for conveying the stencil. Both ends of the conveyor are equipped with robotic arms 5 for gripping the mesh plates. The washing mechanism includes a washing section frame 7. The drying mechanism is located on one side of the washing section frame 7. The drying mechanism includes a drying section frame 8. The conveyor passes through the middle of the washing section frame 7 and the drying section frame 8. Inside the washing section frame 7 and above and below the conveyor, there are a first washing stage 701, a second washing stage 702 and a third washing stage 703 arranged alternately. Inside the drying section frame 8 and above and below the conveyor, there are an upper air curtain machine 83 and a lower air curtain machine 84 for drying the mesh plates arranged alternately.

[0039] It should be noted that in this invention, the pre-treatment strips for demolding are placed onto the bottom truss 11 of the suspended basket 1 during the process. Before operation, the latches 12 at both ends of the bottom truss 11 are straightened, allowing the bottom truss 11 to rest on the bottom frame 13 of the suspended basket. The bottom truss 11 supports the strips, and the suspended basket can load 20 strips at a time, with a load capacity of approximately 130 kg. After setting the process time and speed of the production line, the operation button is activated after the strips are loaded into the suspended basket. The production line will automatically complete the entire process until the finished strips are collected. After activating the operation button, the electric hoist 41 of the gantry frame 4 of the suspended basket sends the suspended basket 1 into the soaking tank. After the set soaking time is reached, the program activates the electric hoist 41 to lift the suspended basket 1 out of the soaking tank 2 and into the draining tank 3 to drain the soaking liquid carried out by the strips. The bottom of the drain trough 3 is equipped with a release strut 31, which is 7cm higher than the base frame 13 of the suspended basket 1. At this time, the release strut 31 supports the bottom truss 11 and the mesh plate, while the base frame 13 of the suspended basket 1 continues to descend 7cm to the bottom of the drain trough 3. At this time, the latch 12 of the bottom truss 11 leaves the base frame 13, and the tension spring 121 inside the latch 12 pushes the straightened latch 12 back to its original position. The suspended basket 1 then detaches from the bottom truss 11 and the supported mesh plate, returning to its original position for the next round of loading. When the suspended platform 1 returns to the agreed position, the program starts the inlet gantry 42 and the mesh-grabbing robot 5 to reach above the drain trough 3. The mesh-grabbing robot 5 begins to clamp the mesh, and the inlet gantry 42 moves the mesh-grabbing robot 5 to the horizontal conveyor wheel rail channel 6. The mesh-grabbing robot 5 lowers the mesh, completing one interval transfer. The inlet gantry 42 and the mesh-grabbing robot 5 repeat this interval clamping and conveying process multiple times until the drain trough 3 outputs an empty signal, at which point it stops. The empty signal also includes a light and a buzzer to notify the removal of the bottom truss 11. The rotation speed of the conveyor wheel 61 on the conveyor wheel rail channel 6 can be adjusted and set according to the operation process time. The mesh is carried by the conveyor wheel 61 during the pre-processing of the mesh in the horizontal process until the process is completed and it is unloaded from the machine. After soaking, the photosensitive film layer of the stencil is in a dissolved state and conveyed to the high-pressure water wash 7 on the wheel-rail channel steel 6. After the first water wash 701, the film is removed, followed by the second water wash 702 and the third water wash 703, resulting in a clean blank stencil. It then passes through process 8 for drying. This pre-processing ensures the cleanliness and quality of the blank stencil, laying a good clean foundation for the subsequent production of the photosensitive film layer. After completing the pre-processing, the wheel-rail channel steel 6 transports the stencil to the outlet. The program activates the exit gantry 43 and the subsequent stencil-grabbing robot 5. The robot clamps the finished stencil and places it on the platform for stacking. This inter-section clamping and conveying of the stencil continues until the empty signal is output at the process outlet, at which point it stops.

[0040] The stripping process on the production line uses an immersion tank method. To remove the cured photosensitive film layer from the screen, the film layer must first be immersed for approximately 4 to 6 minutes. If the production line operates at a speed of 3 m / min, the required equipment length would be 12 m. Reducing the equipment length would mean lowering the operating speed and efficiency. This invention uses an immersion tank method where the screens are horizontally stacked; a 1.1 m screen requires only a 1.5 m tank. One immersion tank is designed for 20 screens, significantly improving space and time utilization. Based on these characteristics, this invention employs a basket-type conveyor. The stripping, rinsing, and drying processes after immersion use a horizontal production line. Adhering to the requirement that neither side of the mesh on the screen should suffer any scratching damage, the horizontal conveyor system uses two wheel-rail systems to transport the screen along the trajectory of the screen frame on both sides of the production line. The wheel-rail system consists of aluminum alloy channel steel with rubber-coated shafts, driven by bevel gears with a 1:1 transmission ratio. The bevel gear rotation mechanism is transmitted via a geared motor and chain mechanism, with the geared motor using a speed-regulating function to control the operating speed. Guide wheels are symmetrically positioned at approximately the same location on the screen frame's conveying surface to ensure the screen travels in a straight line. Simultaneously, bouncing wheels are installed at approximately the same location on the wheel-rail system to ensure the screen is reliably conveyed close to the rubber-coated shaft. This conveyor system design prevents scratching of the mesh on both sides of the screen, thus ensuring that the original properties of the screen remain unchanged. In the preceding soaking and decoction process, a triangular structure basket will be used for conveying, which simplifies the structure and enhances stability. The use of aluminum alloy profiles also meets the requirements for resistance to alkali chemical corrosion. The basket carrying the mesh panels is placed horizontally, ensuring transmission stability during both transport and soaking tank operations. This also provides a directional connection for subsequent horizontal conveying processes. Further optimization of the basket system for the stripping process involves mounting a detachable bottom truss on the bottom frame of the basket, allowing it to return to its original position for the next cycle of operations after the mesh panels have been stripped and soaked. The bottom truss, carrying the mesh panels, is then held by a robotic arm for the washing and drying process. This saves time waiting for the mesh panels to be fed into the distribution machine. The triangular basket's lifting and conveying system can utilize a gantry truss mechanism or a rail-mounted electric hoist. After the basket completes the soaking process, the mesh panels are then transferred from the bottom truss to the conveyor surface of the horizontal assembly line. Given the smooth edges of the mesh frame and the porous, breathable mesh surface, vacuum suction is not feasible. The robotic arm device for gripping wire mesh in this invention adopts a side-gripping and transporting method. The manufacturing scheme of the robotic arm for gripping wire mesh is to use aluminum alloy profiles, and to configure a rigid cantilever frame that is larger than the length (or width) of the wire mesh frame. Then, to install a cylinder with a guide rod at a position similar to the length (or width) of the wire mesh frame, a pneumatic robotic arm device for gripping wire mesh is formed to grip both sides of the wire mesh frame.Based on the optimized design of the aforementioned mesh-grabbing robotic arm device, the rigid cantilever frame of the device utilizes a gantry truss mechanism for transmission, ensuring accurate gripping and placement of the pneumatic robotic arm. The machine's washing and drying process frame is welded from PVC sheets. A water tank is located beneath the frame. A high-pressure water pump connects the filter to the spray pipes and high-pressure nozzles, forming a three-stage washing process with upper and lower spray pipes. Water-saving optimizations have been implemented based on this three-stage washing scheme, with the water supply to the first-stage tank provided by the overflow from the second-stage tank. This design achieves progressively cleaner mesh and improved water quality through progressively higher water quality, resulting in water-saving cleaning. Furthermore, the upper and lower spray pipes are equipped with reciprocating mechanisms, allowing for a 5cm oscillation range during spraying, enhancing dynamic coverage. The drying process utilizes an electric heating air curtain, simplifying the structure and improving practicality, while leveraging a high flow rate for faster drying. An exhaust vent and dust collection tray are located beneath the frame to prevent dust from being stirred up by the airflow. The end-of-line solution for this machine adopts the gantry truss model and mesh grabbing robot of the previous feeding machine, equipped with a forklift platform for load-bearing and handling. The horizontal conveyor flow section of this machine consists of three separate sections: mesh feeding, demolding, washing and drying, and finished product unloading. These sections are fabricated separately and assembled during installation. This facilitates equipment production and transportation, and can be adjusted and inserted when other process equipment sections need to be added to the process.

[0041] like Figure 1 , 2 As shown in Figures 3, 4, and 5, the lifting mechanism also includes a suspended basket gantry 4. An electric hoist 41 is installed on the transverse conveying direction of the suspended basket gantry 4. The suspended basket 1 includes a suspended basket base frame 13. A column angle 141 is fixedly connected to the middle of the suspended basket base frame 13 via a base frame angle 131. A suspended basket column 14 is fixedly connected to the middle of the column angle 141. A diagonal brace 15 is provided between the suspended basket column 14 and the suspended basket base frame 13. The diagonal brace 15 includes a lower diagonal brace plate 154 and an upper diagonal brace plate 153. The lower diagonal brace plate 154 is symmetrically fixed to both ends of the suspended basket base frame 13 about the suspended basket column 14. A diagonal brace plate 153 is fixed to the outer side of the lower diagonal brace plate 154. The flower basket 151 is fixedly connected to the middle of the hanging basket column 14 with an inclined upper buckle plate 153. A rubber-coated steel wire rope 152 is installed on one side of the inclined upper buckle plate 153 and is connected to the inclined flower basket 151. The top of the hanging basket column 14 is fixedly connected to the hanging basket crossbeam 16 through the crossbeam corner plate 161. The bottom truss 11 is placed on the top of the hanging basket base frame 13. Multiple bottom truss crossbars 111 are provided in the middle of the bottom truss 11. The end of the bottom truss 11 is rotatably connected to the latch 12 through the pivot. A tension spring 121 is sleeved on the outside of the pivot. The two ends of the tension spring 121 are connected to the bottom truss 11 and the latch 12 respectively.

[0042] It should be noted that the base frame 13 of the suspended platform 1 of the present invention is composed of four aluminum alloy channel steels forming a square frame, with the four corners clamped and fixed by base frame angles 131 and screws; the two sides of the base frame angles 131 are vertically mounted in the middle of the suspended platform columns 14, which are clamped and fixed by screws with the column angles 141; the upper ends of the two suspended platform columns 14 are connected to the suspended platform crossbeam 16, which is clamped and fixed by screws with the crossbeam angle plates 161. An upper diagonal bracing plate 153 is installed on the upper part of the two side suspended platform columns 14, and a lower diagonal bracing plate 154 is installed at the corresponding position on the base frame 13. A diagonal brace 15 is installed between the upper and lower diagonal bracing plates 153 and 154 on both sides of the suspended platform 1; the diagonal brace 15 consists of a diagonal bracing basket 151 and a rubber-coated steel wire rope 152, and is evenly tightened by the two diagonal bracing baskets 151 on both sides. A lifting ring is installed at the center of the suspended platform crossbeam 16 to connect to an electric hoist 41. The suspended platform 1 of this invention uses lightweight aluminum alloy profiles, which have both the stability of a triangular structure and reliable structural rigidity, maximizing the advantages of the working surface for loading the mesh plate. The selected materials and structure can withstand the corrosion of alkaline chemical immersion. The length of the bottom truss 11 of the suspended platform 1 is less than the inner frame size of the suspended platform base 13, and the inner frame size of the suspended platform base 13 is greater than the size of the mesh plate to be loaded. Before loading the mesh plate, the latches 12 on the bottom truss 11 are straightened and their openings are engaged with the suspended platform base 13. When the suspended platform 1 moves to the drain trough 3 according to the program, the bottom truss 11 is supported by the release truss 31 of the drain trough 3. After the latch opening of the latch 12 is suspended, the tension spring 121 inside the latch 12 pushes the straightened latch 12 back to its original position (12b), and the suspended platform base 13 is disengaged from the latch of the bottom truss 11, allowing the suspended platform 1 to be fully unloaded and returned to its original position.

[0043] like Figure 1 , 5 As shown in Figure 14, a return tank 22 is provided on one side of the soaking tank 2. An overflow pipe 21 is connected between the soaking tank 2 and the return tank 22. A replenishment pump 23 for extracting water from the return tank 22 is installed at the bottom of the return tank 22. The output end of the replenishment pump 23 is connected to the soaking tank 2 through a replenishment pipe 24. A release strut 31 is provided in the middle of the draining tank 3.

[0044] It should be noted that the soaking tank mechanism of the present invention consists of a soaking tank 2, an overflow pipe 21, a return tank 22, a replenishment pump 23, and a replenishment pipe 24. If the soaking tank 2 overflows with chemicals when the basket 1 and the mesh panels are placed in the tank, the overflowing chemicals will flow to the return tank 22 through the overflow pipe 21. When the height of the chemicals in the soaking tank 2 is insufficient to cover 20 mesh panels, a liquid level signal will activate the replenishment pump 23 to replenish chemicals to the soaking tank 2 through the replenishment pipe 24. The replenishment pump 23 will be shut off after the soaking liquid reaches the set level. This control scheme will fully realize automatic control of the liquid level in the soaking tank 2.

[0045] like Figure 1 , 6As shown in Figure 7, a wheel-rail channel steel 6 is fixedly connected inside the bracket. A rubber-coated shaft 61 is rotatably mounted inside the wheel-rail channel steel 6 via a transmission bearing 62. A bevel gear 63 is fixedly connected to the output end of the rubber-coated shaft 61. A main shaft bearing 66 is installed on the side of the wheel-rail channel steel 6. A transmission main shaft 67 is installed in the middle of the main shaft bearing 66. An active bevel gear that meshes with the bevel gear 63 is provided on the outer side of the transmission main shaft 67. A reduction motor 68 for driving the transmission main shaft 67 is installed inside the bracket. A guide wheel 64 and a bouncing wheel 65 are rotatably connected to the side of the wheel-rail channel steel 6.

[0046] It should be noted that the wheel-rail channel steel 6 of this invention uses two aluminum alloy channel steels, with rubber-coated shafts 61 symmetrically mounted on the left and right sides. The inner frame width of the channel steel 6 matches the rubber-coated length of the rubber-coated shaft 61, and the inner frame height of the channel steel 6 matches the rotatable diameter of the rubber-coated shaft 61. The distribution spacing of the rubber-coated shafts 61 is between 20cm and 25cm. Both ends of the rubber-coated shaft 61 are equipped with transmission bearings 62 and fixed with screws. A nylon bevel gear 63 is mounted at the transmission end of the rubber-coated shaft 61, which is located on the outside of the wheel-rail channel steel 6. A bracket is mounted on the outside of the wheel-rail channel steel 6 to install the main shaft bearing 66 and the transmission main shaft 67. The transmission main shaft 67 is located at the position of the transmission bevel gear 63 on the rubber-coated shaft 61, and is meshed with the bevel gear at a transmission ratio of 1:1. The transmission main shaft 67 is connected to the reduction motor 68 via a sprocket. The two ends of the rubber-coated shaft 61 can be fitted with open slots through the shaft holes of the channel steel 6 to facilitate manufacturing and future replacement and maintenance. Meanwhile, guide wheels 64 are installed on brackets at corresponding positions on the outer side of the wheel rail channel steel 6 to correct the deviation of the mesh plate during the conveying process. The guide wheels 64 can be commercially available rubber-coated bearings with shafts. Spring wheels 65 are installed on brackets at corresponding positions on the outer side of the wheel rail channel steel 6. During the mesh plate conveying process, the spring wheels 65 exert a spring-pressing effect on the mesh frame. The spring wheels 65 can be purchased directly online. The wheel rail channel steel 6 is positioned on the frame 7 (8) for conveying the mesh plate and frame, distinguishing between the left and right wheel rails. It is fixed to the front and rear side plate brackets of the frame 7 (8) with screws. The conveying wheel rail embodiment of the above invention has the characteristic of not touching the mesh plate mesh during the conveying process, completely eliminating the chance of scratching damage to the mesh plate mesh. Moreover, the wheel rail channel steel 6 has integral components, allowing for convenient adjustment of the width difference between the left and right wheel rails within the frame to accommodate mesh plates of different sizes for online production.

[0047] like Figure 8 , 9As shown, the conveyor is equipped with an inlet gantry 42 and an outlet gantry 43 at both ends. A grabbing robot 5 is movably mounted on the inlet gantry 42 and the outlet gantry 43 respectively. The grabbing robot 5 includes a lifting rack, a lifting part that drives the lifting rack to move, and a moving part that drives the lifting rack to move. The lifting part consists of a lifting motor and a gear meshing with the lifting rack. The lifting motor drives the lifting rack to move up and down through the gear. The moving part consists of a drive motor and a roller located at the output end. The roller drives the lifting rack along the inlet gantry 42 and the outlet gantry 43. 43. The bottom of the lifting rack is fixedly connected to a scaffold I-beam 53, the bottom of the scaffold I-beam 53 is fixedly connected to a scaffold stringer 51, the middle of the scaffold stringer 51 is fixedly connected to a scaffold crossbar 52, the end of the scaffold stringer 51 is fixedly connected to a claw support 54, the bottom of the claw support 54 is fixedly connected to a claw cylinder 55, the top of the claw cylinder 55 is fixedly connected to a limit spring 56, a scaffold pad 58 is fixedly connected between the limit spring 56 and the claw support 54, and a clamping film 57 is fixedly connected to the output end of the claw cylinder 55.

[0048] It should be noted that the grabbing manipulator 5 of the present invention consists of two flat aluminum alloy I-beams forming a frame truss 51. The length of the frame truss 51 is based on the length of the mesh plate plus the length and stroke of the gripper cylinders 55 at both ends. A gripper bracket 54 is installed at the end of the two frame trusses 51 with screws. The length of the gripper bracket 54 is 70% of the width of the mesh plate. The gripper bracket 54 is made of flat aluminum alloy channel steel, and the back plane of the channel is connected to the I-beam plane of the frame truss 51. The slots of the gripper brackets 54 on both sides face downwards, and three gripper cylinders 55 are evenly distributed on each side. Because the slots of the gripper brackets 54 face downwards, the suspended position of the gripper cylinders 55 should be equipped with a frame pad 58 according to the depth of the slot. At the same time, a limiting spring 56 is clamped and installed. The screws must pass through the gripper brackets 54, the frame pads 58, the limiting springs 56, and the screw holes of the gripper cylinders 55 for fastening. The height of the gripper cylinder 55 should be slightly less than the height of the mesh frame. A 10mm thick silicone sheet should be attached to the clamping surface of the gripper cylinder 55 to prevent slippage and reduce instantaneous rigid impact during clamping. The scaffolding struts 51 are symmetrically riveted with scaffolding crossbars 52 at corresponding positions to increase the stability of the robot arm 5. A scaffolding I-beam 53 is installed in the middle of the scaffolding struts 51. The scaffolding I-beam 53 is made of the same profile as the scaffolding struts 51. At the center of the scaffolding I-beam 53, it connects to the moving mechanism interface of the loading gantry 42. Furthermore, the scaffolding struts 51 can have multiple screw holes for spare gripper supports 54 at corresponding positions. By adjusting the overall position and dimensions of the gripper supports 54, it can be used to produce mesh frames of different sizes within 70% of the original size.

[0049] Given the constraints of the mesh panel, such as its breathable, scratch-resistant surface and relatively smooth frame, the aforementioned embodiment of the mesh panel gripping robot effectively solves the problems of mesh panel unloading machines, prevents scratching damage to the mesh during conveying, and offers flexible application.

[0050] like Figure 1 , 10 As shown in Figures 11 and 12, a section cover plate 78 is installed on the top of the washing section frame 7. Inside the washing section frame 7, above and below the conveyor, are stringer mounting brackets 77. A spray frame stringer 711 is fixedly connected to the middle of the stringer mounting bracket 77. A slide rail slider 712 is slidably connected to the outside of the spray frame stringer 711. A spray pipe 71 is fixedly connected to the outside of the slide rail slider 712. A soft water pipe flange interface 73 is fixedly connected to one side of the spray pipe 71. A flexible hose 731 is connected to the outside of the soft water pipe flange interface 73. A high-pressure nozzle 713 is fixedly connected to the spray pipe 71 facing the conveyor. A DC geared motor 715 is fixedly connected to the outside of the spray frame stringer 711. A motor waterproof cover is fixedly connected to the outside of the DC geared motor 715. 716, the output end of the DC geared motor 715 is connected to a reciprocating connecting rod 714 via a cam. The reciprocating connecting rod 714 is rotatably connected to the spray pipe 71 via a connecting rod pin 717. The bottom of the drying section frame 8 is equipped with a washing water tank. A washing overflow pipe 76 is installed inside the washing water tank. A high-pressure water pump 74 is installed on one side of the washing water tank. A filter cartridge 75 is installed on the outside of the high-pressure water pump 74. The washing water tank is divided into three water tanks by a partition. A second overflow pipe 761 is installed between the corresponding water tanks of the second washing 702 and the third washing 703. A third overflow pipe 762 is installed between the corresponding water tanks of the first washing 701 and the second washing 702. A fourth overflow pipe 763 is installed on the side of the water tank below the first washing 701.

[0051] It should be noted that the water washing section of this invention consists of a spray pipe 71, a high-pressure water pump 74, a filter cartridge 75, and a soft water pipe flange interface 73. The spray pipe 71 is made of 4mm thick stainless steel square tubing and is fitted with a high-pressure nozzle 713. The high-pressure nozzle 713 is a 6-point 55° conical stainless steel high-pressure nozzle with an outer diameter of 26mm for the mounting thread. The rinsing distance between the nozzle and the mesh is 12cm, and the upper and lower nozzles of the high-pressure nozzle 713 are spaced 12cm to 15cm apart. The square tubing of the spray pipe 71 is fitted with flange caps at both ends for easy cleaning and maintenance; the spray pipe 71 and the lower spray pipe 72 are fitted with soft water pipe flange interfaces 73 on their sides. Two sets of slide rail sliders 712 are screwed onto the back of the corresponding high-pressure nozzle of the nozzle 71. The matching slide rails are installed in the grooves of the spray frame stringer 711 to form a longitudinal linear reciprocating sliding mechanism between the nozzle 713 and the spray frame stringer 711. A DC geared motor 715 is screwed onto the back of the groove of the spray frame stringer 711 near the edge. The shaft of the DC geared motor 715 passes through the spray frame stringer 711 and a swing rod and a reciprocating connecting rod 714 are installed in the groove. The other end of the reciprocating connecting rod 714 is fitted onto the connecting rod pin 717 of the nozzle 71. The length of the spray frame stringer 711 is equal to the inner width of the washing section frame 7, and it is fitted with a stringer mounting bracket 77 with the groove opening facing downward. It is then fixed to the side plate of the washing section frame 7 with screws to form an upper spray frame washing mechanism with a swing amplitude of 50mm. The DC geared motor 715 is protected by a motor waterproof cover 716. The outlet of the high-pressure water pump 74 is connected to the inlet of the filter cartridge 75 and is installed on the water tank mounting plate of the washing section frame 7. The outlet of the filter cartridge is connected to the soft water pipe flange interface 73 of the spray pipe 71 and the lower spray pipe 72 by a high-pressure soft water pipe.

[0052] like Figure 1 , 13 As shown, a partition plate 81 is provided in the middle of the drying section frame 8. The inner wall of the drying section frame 8 and the side of the partition plate 81 are both fixed to the upper air curtain machine 83 through the bracket 82. The lower air curtain machine 84 is fixed to the outer side of the partition plate 81 and below the conveyor.

[0053] It should be noted that the drying section of this invention is divided into drying section 1 and drying section 2 by a partition plate 81; the purpose of separating the sections is to reduce moisture interference that may occur when the entire area is open. The length of the drying section 1 is dimension B; the length of the drying section 2 is dimension B+C. Drying section 1 consists of a drying section frame 8, partition plate 81, support 82, upper air curtain machine 83, and lower air curtain machine 84. The upper air curtain machine 83 and lower air curtain machine 84 are commercially available PTC electric heating air curtain machines, and the length of the air curtain machine is selected according to the size of the mesh. The heating power should not be too high, and the working temperature of the hot air should be controlled between 35℃ and 40℃. The temperature must be strictly controlled not to exceed 41℃ to avoid damaging the mesh. The upper air curtain machine 83 of drying section 1 is fitted with a support plate 82 according to its installation dimensions of dimension A, and is installed above the side plate of the drying section frame 8. The distance from the air outlet of the upper air curtain machine 83 to the conveying surface of the wheel rail channel steel 6 is 15cm. The lower air curtain machine 84 is installed directly below the partition plate 81, and the distance from the air outlet of the lower air curtain machine 84 to the conveying surface of the wheel rail channel steel 6 is 10cm. In this embodiment, the upper air curtain machine 2 consists of two units, with a corresponding increase in the partition length dimension C, while other structural dimensions remain unchanged. The lower parts of the drying section frames 8 of drying 1 and drying 2 are connected. At a height of 15cm above the chassis of the drying section frame 8, exhaust holes are provided on both side plates, with exhaust hole dimensions approximately 15cm × 30cm. A dust collection water tray, filled with water to a height of approximately 10cm, serves to guide and block dust from the airflow. The dust collection water tray is equipped with a water inlet and a drain valve for convenient periodic water changes.

[0054] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0055] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated cleaning line for pretreatment of screen printing stencils before decoction, comprising a lifting mechanism for the stencil, an immersion tank (2) for removing the cured photosensitive film layer from the stencil, a conveyor, and a washing mechanism and a drying mechanism disposed in the middle of the conveyor, characterized in that: The lifting mechanism includes a basket (1) for carrying the mesh plate and an electric hoist (41) for lifting and transporting the basket (1). The soaking tank (2) is located in the middle of the basket gantry truss (4). A drain trough (3) is provided on one side of the soaking tank (2). The conveyor includes a support frame and a rubber-coated shaft (61) installed inside the support frame for transporting the mesh plate. Both ends of the conveyor are equipped with mesh plate grabbing manipulators (5) for cooperation. The washing mechanism includes a washing section frame (7). The drying mechanism is placed in the water... On one side of the washing section frame (7), the drying mechanism includes a drying section frame (8), and the conveyor passes through the middle of the washing section frame (7) and the drying section frame (8). Inside the washing section frame (7) and above and below the conveyor, there are a first washing (701), a second washing (702) and a third washing (703). Inside the drying section frame (8) and above and below the conveyor, there are an upper air curtain machine (83) and a lower air curtain machine (84) for drying the mesh plate. The lifting mechanism also includes a basket gantry truss (4), the electric hoist (41) is installed on the conveying transverse side of the basket gantry truss (4), the basket (1) includes a basket base frame (13), the middle of the basket base frame (13) is fixedly connected to a column angle (141) through a base frame angle (131), the middle of the column angle (141) is fixedly connected to a basket column (14), and a diagonal brace (15) is provided between the basket column (14) and the basket base frame (13), the diagonal brace (15) includes The lower inclined plate (154) and the upper inclined plate (153) are symmetrically fixed at both ends of the suspended basket base frame (13) about the suspended basket column (14). The lower inclined plate (154) is fixed to the outside of the lower inclined plate (154). The upper inclined plate (153) is fixedly connected to the middle of the suspended basket column (14). A rubber-coated steel wire rope (152) is installed on one side of the upper inclined plate (153). The rubber-coated steel wire rope (152) is connected to the upper inclined plate (151).

2. The automatic cleaning line for pre-treatment of screen printing stencils before demolding according to claim 1, characterized in that: The top of the suspended basket column (14) is fixed to the suspended basket beam (16) by the crossbeam corner plate (161). The top of the suspended basket base frame (13) is provided with a bottom truss (11). The middle part of the bottom truss (11) is provided with multiple bottom truss crossbars (111). The end of the bottom truss (11) is rotatably connected to a snap fastener (12) by a pivot. A tension spring (121) is sleeved on the outside of the pivot. The two ends of the tension spring (121) are respectively connected to the bottom truss (11) and the snap fastener (12).

3. The automatic cleaning line for pre-treatment of screen printing stencils before demolding according to claim 1, characterized in that: A reflux tank (22) is provided on one side of the soaking tank (2). An overflow pipe (21) is connected between the soaking tank (2) and the reflux tank (22). A replenishment pump (23) for drawing water from the reflux tank (22) is installed at the bottom of the reflux tank (22). The output end of the replenishment pump (23) is connected to the soaking tank (2) through a replenishment pipe (24).

4. The automatic cleaning line for pre-treatment of screen printing stencils before demolding according to claim 1, characterized in that: The drain trough (3) is provided with a release strut (31) in the middle.

5. The automatic cleaning line for pre-treatment of screen printing stencils before demolding according to claim 1, characterized in that: The bracket is fixedly connected to a wheel-rail channel steel (6). The rubber-coated shaft (61) is rotatably mounted inside the wheel-rail channel steel (6) via a transmission bearing (62). The output end of the rubber-coated shaft (61) is fixedly connected to a bevel gear (63). A main shaft bearing (66) is installed on the side of the wheel-rail channel steel (6). A transmission main shaft (67) is installed in the middle of the main shaft bearing (66). An active bevel gear that meshes with the bevel gear (63) is provided on the outer side of the transmission main shaft (67). A reduction motor (68) for driving the transmission main shaft (67) is installed inside the bracket. A guide wheel (64) and a bouncing wheel (65) are rotatably connected to the side of the wheel-rail channel steel (6).

6. The automatic cleaning line for pre-treatment of screen printing stencils before demolding according to claim 1, characterized in that: The conveyor is provided with an inlet gantry (42) and an outlet gantry (43) at both ends. The grabbing plate manipulator (5) is movably mounted on the inlet gantry (42) and the outlet gantry (43). The grabbing plate manipulator (5) includes a lifting rack, a lifting part for driving the lifting rack to rise and fall, and a moving part for driving the lifting rack to move. The bottom of the lifting rack is fixedly connected to a scaffold I-beam (53), and the bottom of the scaffold I-beam (53) is fixedly connected to a scaffold stringer (51). 51) A scaffold crossbar (52) is fixedly connected in the middle. A claw support (54) is fixedly connected to the end of the scaffold crossbar (51). A claw cylinder (55) is fixedly connected to the bottom of the claw support (54). A limit spring (56) is fixedly connected to the top of the claw cylinder (55). A scaffold pad (58) is fixedly connected between the limit spring (56) and the claw support (54). A clamping film (57) is fixedly connected to the output end of the claw cylinder (55).

7. The automatic cleaning line for pre-treatment of screen printing stencils before demolding according to claim 1, characterized in that: The washing section frame (7) is equipped with a section cover plate (78) on top. Inside the washing section frame (7), above and below the conveyor, are stringer mounting brackets (77). A spray frame stringer (711) is fixedly connected to the middle of the stringer mounting bracket (77). A slide rail slider (712) is slidably connected to the outside of the spray frame stringer (711). A spray pipe (71) is fixedly connected to the outside of the slide rail slider (712). A soft water pipe flange interface (73) is fixedly connected to one side of the spray pipe (71). A flexible hose (731) is connected to the outside of the soft water pipe flange interface (73). A high-pressure nozzle (713) is fixedly connected to the spray pipe (71) facing the conveyor. A DC geared motor (715) is fixedly connected to the outside of the spray frame stringer (711). A motor waterproof cover (716) is fixedly connected to the outside of the DC geared motor (715). The output end of the DC geared motor (715) is connected to a reciprocating connecting rod (714) via a cam. The reciprocating connecting rod (714) is rotatably connected to the nozzle (71) via a connecting rod pin (717). The bottom of the drying section frame (8) is provided with a washing water tank. A washing overflow pipe (76) is installed inside the washing water tank. A high-pressure water pump (74) is installed on one side of the washing water tank. A filter cylinder (75) is provided on the outside of the high-pressure water pump (74). The washing water tank is divided into three water tanks by a partition. A second overflow pipe (761) is provided between the water tanks corresponding to the second washing (702) and the third washing (703). A third overflow pipe (762) is provided between the water tanks corresponding to the first washing (701) and the second washing (702). A fourth overflow pipe (763) is provided on the side of the water tank below the first washing (701).

8. The automatic cleaning line for pre-treatment of screen printing stencils before demolding according to claim 1, characterized in that: The drying section frame (8) is provided with a partition plate (81) in the middle. The inner wall of the drying section frame (8) and the side of the partition plate (81) are fixed to the upper air curtain machine (83) through the bracket (82). The lower air curtain machine (84) is fixed to the outer side of the partition plate (81) and below the conveyor.

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