Sealing gasket coating equipment and method

Abstract

The invention belongs to the technical field of gasket machining, and particularly discloses sealing gasket coating equipment and method.The sealing gasket coating equipment comprises a machining table, a conveyor and a drying chamber, a first frame and a second frame are installed on the upper end face of the machining table and connected end to end, and the drying chamber is installed in the second frame; the conveyor is erected in the first frame and the second frame in a penetrating mode, a support is fixedly installed on one side of the exterior of the first frame, a sliding frame is connected to the interior of the support through an arranged lifting assembly, an anti-corrosion hard pipe is inserted into the sliding frame in a penetrating mode, and a liquid feeding mechanism is arranged at one end of the anti-corrosion hard pipe. Four nozzles are installed on the lower portion of the interior of the anti-corrosion hard pipe in the horizontal direction at equal intervals. According to the device, paint recycling is achieved, uniform coating and stable coating are guaranteed, the device is suitable for gaskets of various specifications, the nozzles are convenient to maintain, the machining efficiency and quality are improved, and the cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of gasket processing technology, and specifically discloses a coating device and method for sealing gaskets. Background Technology

[0002] Gaskets are sealing components used in machinery, equipment, and pipelines—anywhere fluid is present. They are materials used both internally and externally to provide a seal. Gaskets are made of metal or non-metal sheet material, manufactured through processes such as cutting, stamping, or shearing. They are used for sealing connections between pipes and between machine parts. Based on material, they can be divided into metal gaskets and non-metal gaskets. Metal gaskets include copper gaskets, stainless steel gaskets, iron gaskets, and aluminum gaskets, while non-metal gaskets include asbestos gaskets, non-asbestos gaskets, paper gaskets, and rubber gaskets. Gasket sealing plays a crucial role in modern industrial enterprises. The quality of the seal directly affects the continuity of production, property safety, energy conservation and environmental protection, and people's physical and mental health. Therefore, the development of gaskets is receiving increasing attention.

[0003] To extend the service life of gaskets and enhance their resistance to corrosion in harsh environments, the industry typically coats the outer surface of gaskets with water-based chromium-free zinc-aluminum coatings. This coating uses zinc and aluminum powder as the core rust-preventing components, water as the solvent, and contains no toxic substances such as chromates. It combines environmental friendliness with rust prevention, making it the mainstream choice for gasket corrosion protection.

[0004] In existing coating processes, when using nozzle mechanisms to spray paint, the lack of effective shielding and recovery structures results in paint diffusion far exceeding the actual area of ​​the gasket. A significant amount of paint is lost without adhering to the gasket surface, increasing raw material costs and requiring additional waste paint disposal, thus exacerbating the environmental burden. Furthermore, during spraying, some paint adheres to the outer surface of the nozzle. Existing equipment can only clean the internal flow channels of the nozzle through a self-rinsing function, failing to effectively clean residual paint from the nozzle's outer cavity. Over time, accumulated residual paint can solidify into lumps, causing nozzle blockage and uneven spraying, directly affecting coating quality. Frequent nozzle disassembly for maintenance also reduces processing efficiency. Therefore, this paper proposes a coating device and method for sealing gaskets to address these problems. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the background art by proposing a coating device for sealing gaskets, including a processing table, a conveyor and a drying chamber. A first frame and a second frame are installed on the upper surface of the processing table, and the first frame and the second frame are connected end to end. The drying chamber is installed inside the second frame. The conveyor runs through the interior of the first frame and the second frame. A bracket is fixedly installed on one side of the outside of the first frame. A slide is connected to the inside of the bracket through a lifting component. A corrosion-resistant rigid tube is inserted inside the slide. A liquid feeding mechanism is provided at one end of the corrosion-resistant rigid tube. Four nozzles are installed at equal intervals along the horizontal direction inside the lower part of the corrosion-resistant rigid tube. Both ends of the corrosion-resistant rigid tube are connected to an annular shell through a fixing component. A bucket-shaped frame is fixedly installed on the bottom wall of the inner side of the annular shell. An inner frame is provided inside the annular shell and above the bucket-shaped frame. The inner frame is fixedly installed inside the fixing component and above the annular shell. The annular shell is located below the periphery of the four nozzles.

[0006] In the above technical solution, the lifting assembly further includes a motor fixedly installed inside the lower part of the bracket, a screw fixedly installed at the output end of the motor, a top seat rotatably mounted on the upper part of the screw away from the motor, the top seat fixedly installed on the upper part of the first frame, one end of the slide is threadedly engaged with the external thread of the screw, and the two outer sides of the slide slide are slidably attached to the inner wall of the bracket.

[0007] In the above technical solution, the liquid feeding mechanism further includes a telescopic hose connected to one end of the anti-corrosion rigid pipe, a metering pump connected to the end of the telescopic hose away from the anti-corrosion rigid pipe, and a liquid storage tank connected to the suction end of the metering pump, the liquid storage tank being located on one side of the processing table.

[0008] In the above technical solution, the fixing component further includes a fixing rod that is fixedly sleeved on one end of the anti-corrosion rigid pipe, and the bottom end of the fixing rod is connected to the bottom wall of the inner side of the annular shell. The inner frame is installed above the inner side of the fixing rod. A suction pipe is connected to one end of the annular shell. A suction pump is connected to the end of the suction pipe away from the annular shell. A return pipe is connected to the lower end of the suction pump. The end of the return pipe away from the suction pump is connected to the liquid storage tank. The suction pump is fixedly connected to the outer wall of the processing table through a fixing frame that is fixedly sleeved.

[0009] In the above technical solution, two sets of slip rings are slidably installed on the outside of the anti-corrosion rigid pipe. The two sets of slip rings are respectively located between two adjacent nozzles on the same side. A frame is fixedly installed at the lower end of the slip ring. L-shaped blocks are symmetrically installed on both sides inside the frame. A rotating shaft is rotatably inserted between the two L-shaped blocks on the same side. Gears are staggered on the outside of the two rotating shafts. A mounting shell is sleeved on the part of the rotating shaft located between the two L-shaped blocks. Cleaning cotton is fixedly installed on the outer wall of the mounting shell.

[0010] In the above technical solution, the top of each of the two sets of slip rings is fixedly installed with a hanger rod, and a bidirectional telescopic rod is provided between the two hanger rods. The outer middle of the bidirectional telescopic rod is connected to the inner top wall of the slide frame through a fixedly sleeved card plate.

[0011] In the above technical solution, further, mounting plates are fixedly installed on the outside of both ends of the frame and at the positions corresponding to the gears. A cylinder is installed inside the mounting plate, and a rack is fixedly installed on the telescopic end of the cylinder. The rack meshes with the gear at the corresponding position.

[0012] A method for coating a sealing gasket using an apparatus, comprising the following steps: S1: Place the gasket to be coated on the feed end of the conveyor, aligning the center of the gasket with the center line of the conveyor belt; S2: Start the conveyor and move the pad to the coating area within the first frame according to the preset speed; when the pad moves directly below the nozzle, start the metering pump to deliver the water-based chromium-free zinc-aluminum coating in the storage tank to the four nozzles through the telescopic hose and anti-corrosion rigid pipe. The coating is atomized and sprayed onto the outer surface of the pad; during the spraying process, the annular shell prevents the spray liquid from spreading outward, and excess spray liquid slides down the inner wall of the annular shell to the hopper frame, where it is temporarily stored at the bottom of the annular shell after preliminary filtration by the inner frame. S3: The coated gaskets enter the drying chamber in the second frame via the conveyor. The temperature of the drying chamber is set to 120-150℃ to cure the coating on the gasket surface. The cured gaskets move to the discharge end via the conveyor and are collected in the finished product storage area. S4: After the coating operation is completed, turn off the metering pump and conveyor. After the temperature of the drying chamber drops to room temperature, turn off the drying chamber, recover the excess spray liquid temporarily stored in the annular shell, and turn off the main power supply of the equipment after checking that there is no damage to each component.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The annular shell, positioned below and outside the nozzle, forms a shield, effectively preventing paint from spreading outwards during spraying and avoiding waste due to paint spillage outside the gasket area. Excess paint slides down the inner wall of the annular shell into a funnel-shaped frame, where it is temporarily stored at the bottom of the annular shell under the guidance of the inner frame. With the help of a suction pipe, a suction pump, and a return pipe, the temporarily stored excess paint can be pumped back into the storage tank, achieving paint recycling, significantly reducing paint consumption costs, and minimizing environmental pollution from waste paint.

[0014] 2. The lifting assembly is driven by a motor to rotate a screw, which in turn moves a slide that is threaded into the screw up and down, thereby adjusting the height of the anti-corrosion rigid pipe and the nozzle. The distance between the nozzle and the gasket can be flexibly adjusted according to the thickness and specifications of the gaskets, ensuring optimal coating operation and meeting the coating needs of various gasket specifications, thus improving the equipment's versatility and applicability.

[0015] 3. The cleaning structure, consisting of a slip ring, frame, and cleaning cotton, uses a cylinder to move a rack when paint residue appears on the nozzle. This movement drives the gear and shaft to rotate, changing the cleaning cotton from a vertical to a horizontal position, parallel to the lower end face of the nozzle. The position of the slip ring is then adjusted by a bidirectional telescopic rod, bringing the cleaning cotton closer to the nozzle. This allows for reciprocating wiping and cleaning of the nozzle's outer surface, effectively removing paint residue adhering to the nozzle's outer cavity. This prevents paint from accumulating and forming lumps that clog the nozzle and affect spraying performance, ensuring the normal operation of the nozzle, reducing equipment failures, and lowering maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is another schematic diagram of the overall connection structure of the present invention; Figure 3 This is a schematic diagram of the connection structure between the lifting mechanism, the annular shell, and the slide of the present invention; Figure 4 This is a schematic diagram of the disassembled connection structure between the annular shell, inner frame, and bucket-shaped frame of the present invention; Figure 5 This is a schematic diagram of the connection structure between the slip ring and the corrosion-resistant rigid pipe of the present invention; Figure 6 This is a schematic diagram of the partial structural connection between the slip ring, frame, and mounting shell of the present invention; Figure 7 This is a schematic diagram of the connection structure between the rotating shaft, gear, and mounting housing of the present invention.

[0017] In the diagram: 1. Processing table; 2. Conveyor; 3. Support frame; 4. First frame; 5. Second frame; 6. Drying chamber; 7. Slide; 8. Telescopic hose; 9. Storage tank; 10. Fixed frame; 11. Return pipe; 12. Top seat; 13. Clamping plate; 14. Annular shell; 15. Metering pump; 16. Fixed rod; 17. Corrosion-resistant rigid pipe; 18. Bidirectional telescopic rod; 19. Hanging rod; 20. Screw; 21. Motor; 22. Suction pump; 23. Inner frame; 24. Bucket-shaped frame; 25. Slip ring; 26. Nozzle; 27. Rack; 28. Cleaning cotton; 29. ​​Cylinder; 30. Frame; 31. L-shaped block; 32. Mounting shell; 33. Gear; 34. Rotating shaft; 35. Mounting plate; 36. Suction pipe. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0020] like Figures 1-7 The coating equipment for sealing gaskets shown includes a processing table 1, a conveyor 2, and a drying chamber 6. A first frame 4 and a second frame 5 are installed on the upper surface of the processing table 1. The first frame 4 and the second frame 5 are connected end to end. The drying chamber 6 is installed inside the second frame 5. The conveyor 2 runs through the interior of the first frame 4 and the second frame 5. A bracket 3 is fixedly installed on one side of the outside of the first frame 4. A slide 7 is connected to the inside of the bracket 3 through a lifting component. A corrosion-resistant rigid tube 17 is inserted inside the slide 7. A liquid feeding mechanism is provided at one end of the corrosion-resistant rigid tube 17. Four nozzles 26 are installed at equal intervals along the horizontal direction at the lower part of the inside of the corrosion-resistant rigid tube 17. An annular shell 14 is installed at both ends of the outside of the corrosion-resistant rigid tube 17 through a fixing component. A bucket-shaped frame 24 is fixedly installed on the bottom wall of the inner side of the annular shell 14. An inner frame 23 is provided inside the annular shell 14 and above the bucket-shaped frame 24. The inner frame 23 is fixedly installed inside the fixing component and above the annular shell 14. The annular shell 14 is located below the periphery of the four nozzles 26.

[0021] The lifting assembly includes a motor 21 fixedly installed inside the lower part of the bracket 3. A screw 20 is fixedly installed at the output end of the motor 21. A top seat 12 is rotatably mounted on the upper part of the screw 20 away from the motor 21. The top seat 12 is fixedly installed on the upper part of the first frame 4. One end of the slide 7 is threadedly engaged with the external thread of the screw 20, and the two outer sides of the slide 7 slide against the inner wall of the bracket 3. In this embodiment, the main function of the top seat 12 is to limit and support the top end of the screw 20, so as to ensure the stability of the screw 20 when it rotates and prevent the screw 20 from deviating. Specifically, when it is necessary to adjust the distance between the nozzle 26 and the gasket according to the thickness of the sealing gasket to be coated, the output end of the motor 21 transmits power to the fixedly installed screw 20, causing the screw 20 to rotate around its own axis. The outer sides of the slide 7 slide against the inner wall of the bracket 3, and the rotational motion of the screw 20 is converted into the linear lifting and lowering motion of the slide 7 along the inner wall of the bracket 3. The slide 7 then drives the internally inserted anti-corrosion rigid tube 17 and the nozzle 26 below to rise and fall synchronously until the nozzle 26 reaches the optimal coating height matching the gasket.

[0022] The liquid feeding mechanism includes a telescopic hose 8 connected to one end of the anti-corrosion rigid pipe 17. The end of the telescopic hose 8 away from the anti-corrosion rigid pipe 17 is connected to a metering pump 15. The suction end of the metering pump 15 is connected to a liquid storage tank 9, which is located on one side of the processing table 1. In this embodiment, the main function of the telescopic hose 8 is to meet the lifting and lowering of the anti-corrosion rigid pipe 17 and the metering pump 15, so as to avoid pipeline damage caused by the lifting and lowering of the anti-corrosion rigid pipe 17 and ensure the continuity of paint delivery. The metering pump 15 can precisely control the amount of paint extracted and delivered, which can avoid waste caused by excessive paint delivery and prevent insufficient delivery from affecting the coating quality. Specifically, when it is necessary to deliver paint to nozzle 26, metering pump 15 is started. Metering pump 15 draws water-based chromium-free zinc-aluminum paint from storage tank 9 located on one side of processing table 1 through suction end. Under the pressure of metering pump 15, paint is delivered to telescopic hose 8 connected to it. Telescopic hose 8 transfers paint to anti-corrosion rigid pipe 17 connected to the other end. Finally, paint is atomized by nozzle 26 below anti-corrosion rigid pipe 17 and sprayed onto the surface of gasket.

[0023] The fasteners include a fixing rod 16 that is fixedly sleeved on one end of the anti-corrosion rigid tube 17, and the bottom end of the fixing rod 16 is connected to the bottom wall of the inner side of the annular shell 14. The inner frame 23 is installed on the upper inner side of the fixing rod 16. A suction pipe 36 is connected to one end of the annular shell 14. A suction pump 22 is connected to the end of the suction pipe 36 away from the annular shell 14. A return pipe 11 is connected to the lower end of the suction pump 22. The end of the return pipe 11 away from the suction pump 22 is connected to the liquid storage tank 9. The suction pump 22 is fixedly connected to the outer wall of the processing table 1 through a fixing bracket 10. In this embodiment, the suction pipe 36 serves as a channel for paint return, transporting excess paint temporarily stored in the annular shell 14 to the suction pump 22. It is a key component connecting the annular shell 14 and the suction pump 22. Specifically, during the coating operation, a fixing rod 16, which is fixedly sleeved at one end of the anti-corrosion rigid tube 17, stably connects the anti-corrosion rigid tube 17 to the annular shell 14, while also providing installation support for the inner frame 23. During the spraying process, excess paint slides down the inner wall of the annular shell 14, is collected by the hopper-shaped frame 24, and is temporarily stored at the bottom of the annular shell 14. When it is necessary to recover excess paint, the suction pump 22 is started, and the paint temporarily stored at the bottom of the annular shell 14 is sucked into the suction pump 22 through the connected suction pipe 36, and then transported back to the storage tank 9 through the return pipe 11 connected to the lower end of the suction pump 22, realizing the recycling of paint. The suction pump 22 is fixed to the outer wall of the processing table 1 by the externally fixed bracket 10 to ensure its stability during operation.

[0024] Two sets of slip rings 25 are slidably installed on the outside of the anti-corrosion rigid pipe 17. The two sets of slip rings 25 are located between two adjacent nozzles 26 on the same side. A frame 30 is fixedly installed at the lower end of the slip rings 25. L-shaped blocks 31 are symmetrically installed on both sides inside the frame 30. A rotating shaft 34 is inserted between the two L-shaped blocks 31 on the same side. Gears 33 are interlocked on the outside of the two rotating shafts 34. A mounting shell 32 is fitted on the part of the rotating shaft 34 between the two L-shaped blocks 31. A cleaning cotton 28 is fixedly installed on the outer wall of the mounting shell 32.

[0025] Both sets of slip rings 25 are fixedly installed with hangers 19 at the top, and a bidirectional telescopic rod 18 is provided between the two hangers 19. The bidirectional telescopic rod 18 is connected to the inner top wall of the slide frame 7 through a fixedly sleeved clamping plate 13 in the middle of its outer side. Specifically, after the coating operation is completed, if there is paint residue on the outer surface of the nozzle 26, it can be cleaned using this cleaning structure. Since the slip ring 25 is slidably installed at both ends of the anti-corrosion rigid pipe 17 and located between the two sets of nozzles 26, it can be pushed to slide along the anti-corrosion rigid pipe 17, causing the frame 30 fixedly installed at the lower end to move to the nozzle 26. The inner sides of the frame 30 are rotatably supported by L-shaped blocks 31 on both sides of the rotating shaft 34. When cleaning is required, the rotating shaft 34 can be driven to rotate, causing the mounting shell 32, which is sleeved in the middle outside, to rotate synchronously. The cleaning cotton 28 fixedly installed on the outer wall of the mounting shell 32 rotates accordingly, moving to below the nozzle 26, and then contacting and wiping the outer surface of the nozzle 26 to remove paint residue. Meanwhile, the gears 33 interlocked on the outside of the two rotating shafts 34 enable the two rotating shafts 34 to rotate in tandem, ensuring that the cleaning cotton 28 on both sides cleans synchronously and improving the cleaning effect. When it is necessary to adjust the position of the slip ring 25 to clean different nozzles 26, the bidirectional telescopic rod 18 is activated. Since the bidirectional telescopic rod 18 is fixed to the inner top wall of the slide frame 7 by a fixedly fitted clamping plate 13, and the two ends of the bidirectional telescopic rod 18 are respectively connected to the hanging rods 19 fixedly installed on the top of the two sets of slip rings 25, when the bidirectional telescopic rod 18 extends or retracts, it will drive the slip rings 25 to slide along the outside of the anti-corrosion rigid pipe 17 through the hanging rods 19. By controlling the extension and retraction length of the bidirectional telescopic rod 18, the position of the slip rings 25 can be precisely adjusted, so that the frame 30 and the cleaning cotton 28 can be accurately moved to the nozzles 26 that need to be cleaned, thereby achieving precise cleaning of the nozzles 26.

[0026] Mounting plates 35 are fixedly installed on both ends of the frame 30 at positions corresponding to gears 33. Cylinders 29 are fitted inside the mounting plates 35. Racks 27 are fixedly installed on the telescopic ends of cylinders 29. Racks 27 mesh with gears 33 at corresponding positions. Specifically, when the rotating shaft 34 needs to be driven to rotate the cleaning cotton 28 to clean the nozzle 26, the cylinders 29, which are mounted inside the external mounting plates 35 at both ends of the frame 30, are activated. The telescopic end of the cylinder 29 drives the fixedly mounted rack 27 to move horizontally. Since the rack 27 meshes with the gear 33 on the outside of the corresponding rotating shaft 34, the linear motion of the rack 27 is converted into the rotational motion of the gear 33. The gear 33 then drives the rotating shaft 34 to rotate between the L-shaped blocks 31. The rotating shaft 34 drives the external mounting shell 32 and the cleaning cotton 28 to rotate synchronously, so that the cleaning cotton 28 contacts and wipes the outer surface of the nozzle 26, completing the cleaning of the nozzle 26. By controlling the telescopic stroke of the cylinder 29, the moving distance of the rack 27 can be controlled, thereby controlling the rotation angle of the gear 33 and the rotating shaft 34, realizing the adjustment of the rotation amplitude of the cleaning cotton 28 to adapt to different cleaning needs.

[0027] A method for coating a sealing gasket using an apparatus, comprising the following steps: S1: Place the gasket to be coated at the feed end of conveyor 2, aligning the center of the gasket with the center line of the conveyor belt of conveyor 2; S2: Start the conveyor 2 and move the pad to the coating area in the first frame 4 according to the preset speed; when the pad moves to the position directly below the nozzle 26, start the metering pump 15 to transport the water-based chromium-free zinc-aluminum coating in the storage tank 9 to the four nozzles 26 through the telescopic hose 8 and the anti-corrosion rigid pipe 17. After the coating is atomized, it is sprayed onto the outer surface of the pad. During the spraying process, the annular shell 14 prevents the spray liquid from spreading outward. Excess spray liquid slides down the inner wall of the annular shell 14 to the bucket-shaped frame 24, and is temporarily stored at the bottom of the annular shell 14 after preliminary filtration by the inner frame 23. S3: The coated gasket enters the drying chamber 6 in the second frame 5 along with the conveyor 2. The temperature of the drying chamber 6 is set to 120-150℃ to cure the coating on the surface of the gasket. The cured gasket moves to the discharge end along with the conveyor 2 and is collected in the finished product storage area. S4: After the coating operation is completed, turn off the metering pump 15 and the conveyor 2. After the temperature of the drying chamber 6 drops to room temperature, turn off the drying chamber 6, recover the excess spray liquid temporarily stored in the annular shell 14, and turn off the main power supply of the equipment after checking that there is no damage to each component.

[0028] Place the sealing gasket to be coated at the feed end of conveyor 2, ensuring that the center of the gasket is aligned with the center line of the conveyor belt of conveyor 2, laying the foundation for subsequent uniform coating. At this time, all components of the equipment are in the initial standby state, the water-based chromium-free zinc-aluminum coating is prepared in the liquid storage tank 9, the drying chamber 6 has not yet been started, and all electrical components are in the standby state. According to the thickness specification of the sealing gasket to be coated, start the motor 21 inside the lower part of the bracket 3. The output end of the motor 21 drives the screw 20 to rotate. Since the end of the screw 20 away from the motor 21 is fixed to the outside of the first frame 4 by the top seat 12, and one end of the slide 7 is threaded with the outside of the screw 20, and the two sides of the outside of the slide 7 slide against the inner wall of the bracket 3, the rotation of the screw 20 will be converted into the slide 7 sliding up and down along the inner wall of the bracket 3. The slide 7 drives the internally inserted anti-corrosion hard tube 17 and the nozzle 26 below the anti-corrosion hard tube 17 to rise and fall synchronously until the nozzle 26 and the annular shell 14 reach the appropriate coating distance with the gasket surface. Then, turn off the motor 21 to complete the coating height adjustment. Conveyor 2 is started. At a preset speed, conveyor 2 moves the pad towards the coating area within the first frame 4. When the pad is directly below the nozzle 26, metering pump 15 is started. Metering pump 15 draws water-based chromium-free zinc-aluminum coating from storage tank 9 through its suction end. After being pressurized by metering pump 15, the coating is delivered to the interior of anti-corrosion rigid pipe 17 through telescopic hose 8. The coating enters the anti-corrosion rigid pipe 17 and flows along the pipe cavity. Finally, it is atomized by four nozzles 26 installed at equal horizontal distances below the interior of the anti-corrosion rigid pipe 17 and evenly sprayed onto the outer surface of the pad below. During the spraying process, the annular shells 14, installed at both ends of the anti-corrosion rigid pipe 17 by fixing rods 16, are located below and outside the nozzles 26, providing sufficient pressure. Effectively preventing the sprayed liquid from spreading outwards, excess sprayed liquid slides down the inner wall of the annular shell 14 into the bucket-shaped frame 24 fixedly installed on the bottom inner wall of the annular shell 14, where it is temporarily stored at the bottom inner side of the annular shell 14. Subsequently, the suction pump 22 can be started, and the excess sprayed liquid temporarily stored at the bottom of the annular shell 14 is sucked into the suction pump 22 through the suction pipe 36, and then transported back to the storage tank 9 through the return pipe 11 connected to the lower end of the suction pump 22, realizing the recycling of the coating. After the coating is completed, the gasket continues to move with the conveyor 2 and enters the drying chamber 6 installed inside the second frame 5. The drying chamber 6 is started and its temperature is set to 120-150℃. Under this temperature condition, the coating on the surface of the gasket gradually solidifies, forming a stable protective coating. After curing, the gasket continues to move with the conveyor 2 to the discharge end and is finally collected in the finished product storage area. After the coating operation is completed, the nozzle 26 is cleaned. The cylinders 29, which are installed inside the external mounting plates 35 at both ends of the frame 30, are activated. The telescopic end of the cylinder 29 drives the rack 27 to move. The rack 27 meshes with the gear 33 sleeved on the outside of the rotating shaft 34, thereby driving the rotating shaft 34 to rotate between the two L-shaped blocks 31 on the same side. The mounting shell 32, which is sleeved in the middle of the outside of the rotating shaft 34, rotates accordingly. The cleaning cotton 28, which is fixedly installed on the outer wall of the mounting shell 32, changes from a horizontal folded state to a state parallel to the lower end face of the nozzle 26. The bidirectional telescopic rod 18 is activated to drive the hanging rods 19 at both ends to move. As a result, the slip ring 25 slides along the outside of the anti-corrosion rigid pipe 17, so that the frame 30, which is fixedly installed at the lower end of the slip ring 25, moves to the nozzle 26. Then, it is pushed back and forth to wipe and clean the outer surface of the nozzle 26.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A coating apparatus for sealing gaskets, comprising a processing table (1), a conveyor (2), and a drying chamber (6), characterized in that: The processing table (1) is equipped with a first frame (4) and a second frame (5) on its upper surface. The first frame (4) and the second frame (5) are connected end to end. The drying chamber (6) is installed inside the second frame (5). The conveyor (2) runs through the interior of the first frame (4) and the second frame (5). A bracket (3) is fixedly installed on one side of the outside of the first frame (4). A slide (7) is connected inside the bracket (3) through a lifting assembly. A corrosion-resistant rigid pipe (17) is inserted inside the slide (7). 7) One end is provided with a liquid feeding mechanism. Four nozzles (26) are installed at equal intervals along the horizontal direction inside the lower part of the anti-corrosion rigid pipe (17). Both ends of the anti-corrosion rigid pipe (17) are jointly installed with an annular shell (14) through the provided fixing parts. A bucket-shaped frame (24) is fixedly installed on the bottom wall of the inner side of the annular shell (14). An inner frame (23) is provided inside the annular shell (14) and above the bucket-shaped frame (24). The inner frame (23) is fixedly installed inside the fixing parts. The annular shell (14) is located below the periphery of the four nozzles (26).

2. The coating equipment for a sealing gasket according to claim 1, characterized in that: The lifting assembly includes a motor (21) fixedly installed inside the lower part of the bracket (3). A screw (20) is fixedly installed at the output end of the motor (21). A top seat (12) is rotatably fitted above the end of the screw (20) away from the motor (21). The top seat (12) is fixedly installed on the upper part of the first frame (4). One end of the slide (7) is threaded with the outside of the screw (20), and the two outer sides of the slide (7) slide against the inner wall of the bracket (3).

3. The coating equipment for a sealing gasket according to claim 1, characterized in that: The liquid feeding mechanism includes a telescopic hose (8) connected to one end of the anti-corrosion rigid pipe (17), and a metering pump (15) connected to the end of the telescopic hose (8) away from the anti-corrosion rigid pipe (17). A liquid storage tank (9) is connected to the suction end of the metering pump (15), and the liquid storage tank (9) is located on one side of the processing table (1).

4. The coating equipment for a sealing gasket according to claim 3, characterized in that: The fastener includes a fixing rod (16) that is fixedly sleeved on one end of the anti-corrosion rigid tube (17), and the bottom end of the fixing rod (16) is connected to the bottom wall of the inner side of the annular shell (14). The inner frame (23) is installed above the inner side of the fixing rod (16). A suction pipe (36) is connected to one end of the annular shell (14). A suction pump (22) is connected to one end of the suction pipe (36) away from the annular shell (14). A return pipe (11) is connected to the lower end of the suction pump (22). The end of the return pipe (11) away from the suction pump (22) is connected to the liquid storage tank (9). The suction pump (22) is fixedly connected to the outer wall of the processing table (1) through a fixed bracket (10).

5. The coating equipment for a sealing gasket according to claim 1, characterized in that: Two sets of slip rings (25) are slidably installed on the outside of the anti-corrosion rigid pipe (17). The two sets of slip rings (25) are respectively located between two adjacent nozzles (26) on the same side. A frame (30) is fixedly installed at the lower end of the slip ring (25). L-shaped blocks (31) are symmetrically installed on both sides inside the frame (30). A rotating shaft (34) is rotatably inserted between the two L-shaped blocks (31) on the same side. Gears (33) are staggered on the outside of the two rotating shafts (34). A mounting shell (32) is sleeved on the part of the rotating shaft (34) located between the two L-shaped blocks (31). A cleaning cotton (28) is fixedly installed on the outer wall of the mounting shell (32).

6. The coating equipment for a sealing gasket according to claim 5, characterized in that: Both sets of slip rings (25) are fixedly installed with a hanger (19) at the top. A bidirectional telescopic rod (18) is provided between the two hangers (19). The bidirectional telescopic rod (18) is connected to the inner top wall of the slide frame (7) through a fixedly sleeved card plate (13) in the middle of its outer side.

7. The coating equipment for a sealing gasket according to claim 5, characterized in that: Mounting plates (35) are fixedly installed on both ends of the frame (30) at the positions corresponding to the gears (33). A cylinder (29) is installed inside the mounting plate (35). A rack (27) is fixedly installed on the telescopic end of the cylinder (29). The rack (27) meshes with the gear (33) at the corresponding position.

8. A method applied to a coating apparatus for a sealing gasket according to any one of claims 1-7, characterized in that, The following usage steps are included: S1: Place the gasket to be coated at the feed end of the conveyor (2) so that the center of the gasket is aligned with the center line of the conveyor belt (2); S2: Start the conveyor (2) and move the pad to the coating area in the first frame (4) according to the preset speed; when the pad moves to the nozzle (26) directly below, start the metering pump (15) to transport the water-based chromium-free zinc-aluminum coating in the storage tank (9) to the four nozzles (26) through the telescopic hose (8) and the anti-corrosion hard pipe (17). After the coating is atomized, it is sprayed on the outer surface of the pad. During the spraying process, the annular shell (14) blocks the spray liquid from spreading outward. The excess spray liquid slides down the inner wall of the annular shell (14) to the bucket-shaped frame (24), and is temporarily stored at the bottom of the annular shell (14) after preliminary filtration by the inner frame (23). S3: The coated gasket enters the drying chamber (6) in the second frame (5) along with the conveyor (2). The temperature of the drying chamber (6) is set to 120-150℃ to cure the coating on the surface of the gasket. The cured gasket moves to the discharge end along with the conveyor (2) and is collected in the finished product storage area. S4: After the coating operation is completed, turn off the metering pump (15) and the conveyor (2). After the temperature of the drying chamber (6) drops to room temperature, turn off the drying chamber (6), recover the excess spray liquid temporarily stored in the annular shell (14), and turn off the main power supply of the equipment after checking that there is no damage to each component.

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