Powder coating continuous production device based on twin-screw extrusion

Abstract

The invention relates to the technical field of powder production, and discloses a powder coating continuous production device based on twin-screw extrusion, the powder coating continuous production device comprises an extrusion box, a pair of extrusion screws are rotatably connected in the extrusion box, output gears are fixedly connected to the outer walls of shaft rods of the extrusion screws, and teeth of the two output gears are engaged with each other; a servo motor is fixedly installed on one side of the extrusion box, an output shaft of the servo motor is fixedly connected with a shaft rod of one extrusion screw, the upper portion of the extrusion box fixedly communicates with a feeding bin, the lower portion of the extrusion box fixedly communicates with a discharging port, and an impurity discharging assembly is arranged above the feeding bin. When particle impurities intercepted on the upper surface of the first filter screen are accumulated to a certain degree, the impurity discharging assembly drives the first filter screen to rotate, the intercepted particle impurities are discharged out, collection treatment of the particle impurities is completed, the particle impurities with high hardness are effectively prevented from entering the extrusion box, and the extrusion efficiency is improved. The particles are prevented from colliding with the surface of the screw in the material conveying process of the screw, and the surface of the screw is protected.

Description

Technical Field

[0001] This invention belongs to the field of powder production technology, and specifically relates to a continuous powder coating production device based on twin-screw extrusion. Background Technology

[0002] Powder coatings, as a unique type of solid granular coating, occupy an important position in the coating industry due to their excellent performance and environmental protection characteristics. They are usually composed of carefully proportioned resins, pigments, curing agents, and various functional additives. During the production process, these components are uniformly mixed in powder form and then precisely and firmly adhered to the surface of the object using electrostatic spraying technology, which utilizes electrostatic attraction. This unique coating method not only gives the object a uniform and smooth appearance but also ensures that the coating has good adhesion and durability. Powder coatings have a wide range of applications, being used on the surfaces of various materials such as plastics and wood, providing these materials with excellent protective and decorative effects.

[0003] Powder coatings contain absolutely no volatile organic compounds (VOCs), and produce virtually no harmful gas emissions during production, application, and curing, effectively reducing environmental pollution at its source. In the production of powder coatings, twin-screw extruders play a crucial role. With their powerful mixing and melting capabilities, they efficiently and uniformly mix various raw materials, bringing them to a suitable molten state. Then, through a precisely controlled extrusion process, the molten material is formed into coatings or granules that meet the required specifications, providing a strong guarantee for the high-quality production of powder coatings.

[0004] In the production process of powder raw materials, they need to be fed into a twin-screw extruder to achieve mixing and melting, and then extruded to form coatings or granules that meet the requirements. However, powder raw materials often contain some particulate impurities with high hardness. When these impurities enter the extruder with the raw materials, they will collide with the screw surface during the material conveying process. Due to the high hardness of the impurities, such collisions can easily damage the screw surface, affecting the normal operation of the extruder and the production quality.

[0005] Therefore, the present invention provides a continuous powder coating production apparatus based on twin-screw extrusion. Summary of the Invention

[0006] To overcome the shortcomings of the prior art: to solve at least one technical problem raised in the background art.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A continuous powder coating production device based on twin-screw extrusion, comprising an extrusion chamber, a pair of extrusion screws rotatably connected inside the extrusion chamber, output gears fixedly connected to the outer walls of the shafts of the extrusion screws, the teeth of the two output gears meshing with each other, a servo motor fixedly installed on one side of the extrusion chamber, the output shaft of the servo motor fixedly connected to the shaft of one of the extrusion screws, a feed hopper fixedly connected above the extrusion chamber, and a discharge port fixedly connected below the extrusion chamber, a waste removal assembly provided above the feed hopper, the waste removal assembly including two rotatable filter screens, which can process particles intercepted on their upper surfaces after rotation, a flow diversion assembly provided above the feed hopper, which can flexibly control the flow path of the raw materials, and a return assembly provided outside the feed hopper for processing and returning the raw materials mixed in with the particles.

[0008] Preferably, a feeding box is fixedly connected to the top of the feeding hopper, and a partition plate is fixedly installed inside the feeding box. The partition plate divides the inside of the feeding box into a filter chamber one and a filter chamber two. Two filter screens are located inside the filter chamber one and the filter chamber two respectively, and one end of the filter screen is attached to one side of the partition plate.

[0009] Preferably, the impurity removal component includes two motors, both of which are fixedly installed on the outer wall of the feeding box. The output shaft of each motor is fixedly connected to a rotating shaft, which is rotatably connected to the inner walls of both sides of the feeding box. The outer wall of the rotating shaft is fixedly connected to the inner wall of one end of the filter screen.

[0010] Preferably, the outer wall of the rotating shaft is fixedly connected with a side blocking plate, the side blocking plate is perpendicular to the filter screen, and the side blocking plate is adapted to the side wall opening of the feeding box.

[0011] Preferably, the diversion component includes a diversion plate, a rotating shaft two is fixedly connected to the inner wall of the center of the diversion plate, the rotating shaft two is rotatably connected to the inner wall of the feeding box, the top of the feeding box is fixedly connected to a feeding pipe, a valve is provided on the outside of the feeding pipe, and a gear assembly that can drive the rotating shaft two to rotate is provided between the rotating shaft two and one of the rotating shafts one.

[0012] Preferably, the gear assembly includes a gear fixedly connected to the outer wall of the second rotating shaft. A connecting rod is fixedly connected to the outer wall of one of the rotating shafts. A rack plate is fixedly connected to one end of the connecting rod. The teeth of the rack plate can mesh with the teeth of the connecting rod. A sensing panel is provided below the diversion plate and is fixedly connected to the top of the partition plate.

[0013] Preferably, the reflux assembly includes two impurity removal boxes, which are fixedly connected to the side of the feeding box. The inner wall of each impurity removal box is fixedly connected to a rotating shaft three, and the outer wall of each rotating shaft three is fixedly connected to a filter screen two. An extension plate is fixedly connected to one side of each filter screen two, and the extension plate is perpendicular to the filter screen two. A vibrator is fixedly installed at the bottom of each filter screen one, and a drive assembly for rotating the rotating shaft three is provided on the outside of the impurity removal box.

[0014] Preferably, the drive assembly includes an arc-shaped slide block, which is fixedly installed on the side wall of the impurity removal box. The inner wall of each arc-shaped slide block is slidably connected to an inner slider. The rotating shaft is fixedly connected between the top of the two inner sliders. An arc-shaped telescopic rod is fixedly connected to the inner wall of each arc-shaped slide block, and one end of the arc-shaped telescopic rod is fixedly connected to the side of the inner slider.

[0015] Preferably, each impurity removal box is equipped with an impurity collection box inside, and a return pipe is fixedly connected to the bottom of the impurity removal box. The end of the return pipe away from the impurity removal box is fixedly connected to the inside of the extrusion box.

[0016] Preferably, the bottom of the extrusion box is fixedly connected to a housing, the outer wall of the housing is provided with a control panel, the inside of the housing is provided with a collection box, the collection box is slidably connected to the inner wall of the housing, and the collection box is located directly below the discharge port.

[0017] The beneficial effects of this invention are as follows: 1. The continuous powder coating production device based on twin-screw extrusion described in this invention uses a waste removal component. When the particulate impurities intercepted on the upper surface of the filter screen accumulate to a certain extent, the waste removal component drives the filter screen to rotate, discharging the intercepted particulate impurities. This completes the collection and treatment of particulate impurities, effectively preventing high-hardness particulate impurities from entering the extrusion chamber and preventing these impurities from colliding with the screw surface during material conveying by the screw, thereby protecting the screw surface and reducing screw damage.

[0018] 2. The continuous powder coating production device based on twin-screw extrusion described in this invention can flexibly control the flow path of raw materials through a diversion component. In the initial stage, the raw materials are guided to fall onto the left filter screen for filtration. When the left filter screen is processing particulate impurities, the raw materials are guided to flow to the right filter screen. When the right filter screen is processing impurities, the raw materials are guided to flow to the left filter screen, thus achieving uninterrupted processing of raw materials. This allows the raw materials to continuously enter the extrusion box for production, avoiding interruptions in raw material supply caused by filter screen cleaning of impurities and improving production efficiency.

[0019] 3. The continuous powder coating production device based on twin-screw extrusion described in this invention uses a reflux assembly to screen the raw material powder mixed with particulate impurities in the discharged material, effectively separating the raw material powder from the particulate impurities, returning the mixed raw material to the inside of the extrusion box, and simultaneously collecting the particulate impurities, thereby improving the utilization rate of raw materials, reducing waste, and lowering production costs. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional view of the entire invention; Figure 2 This is a schematic diagram of the chassis structure in this invention; Figure 3 This is a schematic diagram of the internal structure of the extrusion box in this invention; Figure 4 This is a schematic diagram of the structure of the feed hopper in this invention; Figure 5 This is a schematic diagram of one part of the filter screen in this invention; Figure 6 This is a schematic diagram of the structure at the drainage plate in this invention; Figure 7 This is a schematic diagram of the internal structure of the feeding box in this invention; Figure 8 This is a schematic diagram of the internal structure of the impurity removal box in this invention; Figure 9 This is a schematic diagram of the two structures of the filter screen in this invention; Figure 10 This is a schematic diagram of the arc-shaped slide block in this invention.

[0022] In the diagram: 1. Extrusion box; 2. Extrusion screw; 3. Output gear; 4. Servo motor; 5. Feed hopper; 6. Discharge port; 7. Chassis; 8. Collection box; 9. Control panel; 10. Feeding box; 11. Filter screen one; 12. Divider plate; 13. Rotating shaft one; 14. Motor; 15. Side blocking plate; 16. Diverter plate; 17. Rotating shaft two; 18. Feed pipe; 19. Valve; 20. Gear; 21. Connecting rod; 22. Rack plate; 23. Sensor panel; 24. Impurity removal box; 25. Filter screen two; 26. Extension plate; 27. Return pipe; 28. Rotating shaft three; 29. ​​Arc-shaped slide; 30. Arc-shaped telescopic rod; 31. Inner slider; 32. Vibrator; 33. Impurity collection box; 34. Filter chamber one; 35. Filter chamber two. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 10 As shown, the present invention provides a technical solution: a continuous powder coating production device based on twin-screw extrusion, comprising an extrusion chamber 1, a pair of extrusion screws 2 rotatably connected inside the extrusion chamber 1, output gears 3 fixedly connected to the outer wall of the shaft of each of the extrusion screws 2, the teeth of the two output gears 3 meshing with each other, a servo motor 4 fixedly installed on one side of the extrusion chamber 1, the output shaft of the servo motor 4 fixedly connected to the shaft of one of the extrusion screws 2, a feed hopper 5 fixedly connected above the extrusion chamber 1, a discharge port 6 fixedly connected below the extrusion chamber 1, a waste removal component provided above the feed hopper 5, the waste removal component including two rotatable filter screens 11, the filter screens 11 can process the particles intercepted on their upper surface after rotation, a diversion component provided above the feed hopper 5, the diversion component can flexibly control the flow path of the raw materials, and a return component provided outside the feed hopper 5 for processing and returning the raw materials mixed in with the particles.

[0025] During operation: In the production process of powder raw materials, they need to be fed into a twin-screw extruder to achieve mixing and melting, and then extruded to form coatings or granules that meet the requirements. However, powder raw materials often contain some high-hardness particulate impurities. When these impurities enter the extruder with the raw materials, they will collide with the screw surface during the material conveying process. Due to the high hardness of the impurities, this collision can easily damage the screw surface, affecting the normal operation of the extruder and the production quality. In the specific application of this solution, the raw materials enter through the feed hopper 5. Before entering the extrusion chamber 1, the material flows over filter screen 11. Under the action of the diversion component, the material first falls to the top of the left filter screen 11 for filtration. Particles are intercepted on the upper surface of the left filter screen 11, while powder enters the extrusion chamber 1 through the mesh for extrusion processing. After the left filter screen 11 has been working for a period of time, when a large amount of particles have accumulated on its upper surface, the impurity removal component drives the left filter screen 11 to rotate. After rotating, the filter screen 11 discharges the particulate impurities on its upper surface, thus cleaning the left filter screen. The left filter 11 collects and processes particulate impurities intercepted on its surface. While processing particulate impurities, the flow diversion component guides the raw material towards the right filter 11, ensuring uninterrupted processing and continuous entry of the raw material into the extrusion chamber 1 for production. After the left filter 11 completes its rotation, the return component sieves the raw material powder mixed with the particulate impurities. Through a fine sieve structure, the raw material powder is effectively separated from the particulate impurities, and the mixed raw material is returned to the extrusion chamber 1 to participate in extrusion production again. During the process, particulate impurities are collected and processed separately for subsequent unified treatment or recycling. After the left filter screen 11 completes the impurity cleaning, it rotates back to its initial state. At this time, the right filter screen 11 also faces particle accumulation after a period of particle interception. Subsequently, following the operation process of the left filter screen 11, the impurity removal component drives it to rotate and remove impurities, the diversion component guides the raw material to flow to the left filter screen 11, and the return component screens and returns the discharged impurities. This cycle repeats to ensure the continuous and stable operation of the entire production process. Through the above embodiments, when the particulate impurities intercepted on the upper surface of filter screen 11 accumulate to a certain extent, the impurity removal component drives filter screen 11 to rotate, discharging the intercepted particulate impurities and completing the collection and treatment of particulate impurities. This effectively prevents hard particulate impurities from entering the extrusion chamber 1 and prevents these impurities from colliding with the screw surface during material conveying, thereby protecting the screw surface and reducing screw damage. Through the diversion component, the flow path of the raw material can be flexibly controlled. In the initial stage, the raw material is guided to fall onto the left filter screen 11 for filtration. When the left filter screen 11 processes particulate impurities... The system guides the raw material to flow towards the right-side filter screen 11. When the right-side filter screen 11 processes impurities, it also guides the raw material to flow towards the left-side filter screen 11, achieving uninterrupted processing of the raw material. This allows the raw material to continuously enter the extrusion box 1 for production, avoiding interruptions in the raw material supply caused by the filter screens cleaning impurities and improving production efficiency. Through the reflux assembly, the raw material powder mixed with the discharged particulate impurities is screened, effectively separating the raw material powder from the particulate impurities. The mixed raw material is then returned to the extrusion box 1, while the particulate impurities are collected separately, improving the utilization rate of the raw material, reducing waste, and lowering production costs.

[0026] like Figures 5 to 6 As shown, a feeding box 10 is fixedly connected to the top of the feeding hopper 5. A partition plate 12 is fixedly installed inside the feeding box 10. The partition plate 12 divides the inside of the feeding box 10 into a first filter chamber 34 and a second filter chamber 35. Two filter screens 11 are located inside the first filter chamber 34 and the second filter chamber 35, respectively, and one end of the filter screen 11 is attached to one side of the partition plate 12.

[0027] During operation: The raw material first enters the feeding box 10 through the top. Under the guidance of the diversion component in the initial state, the raw material will flow to the top of the left filter screen 11. The powder raw material is filtered by the left filter screen 11 and enters the feeding bin 5 through the mesh. Impurities are intercepted on the surface of the filter screen 11. When the left filter screen 11 intercepts a lot of impurities and needs to be cleaned, the impurity discharge component drives it to rotate and discharge the impurities. At this time, the diversion component guides the raw material to the right filter screen 11 for filtration. After the left filter screen 11 is cleaned, it returns to the initial position, and the right filter screen 11 operates according to the same process. This cycle continues.

[0028] like Figures 4 to 6 As shown, the impurity removal assembly includes two motors 14, both of which are fixedly installed on the outer wall of the feeding box 10. The output shafts of the motors 14 are fixedly connected to a rotating shaft 13. The rotating shaft 13 is rotatably connected to the inner walls of both sides of the feeding box 10, and the outer wall of the rotating shaft 13 is fixedly connected to the inner wall of one end of the filter screen 11.

[0029] During operation: When the particles intercepted on the surface of the left filter screen 11 need to be processed, the corresponding motor 14 is started. Its output shaft drives the left filter screen 11 to rotate around the pivot point of the pivot shaft 13 through the rotating shaft 13. When the filter screen 11 rotates upward, its surface will gradually rotate from a horizontal state to a vertical state. When the filter screen 11 rotates to a vertical state, its original upper surface will face the outside of the feeding box 10. This allows the particles that were originally stuck on its surface to slide out of the feeding box 10 under the action of gravity, thus discharging the particles into the external collection device and completing the impurity removal operation. The same process is used to process the particles on the surface of the right filter screen 11.

[0030] like Figures 4 to 6 As shown, the outer wall of the rotating shaft 13 is fixedly connected with a side blocking plate 15. The side blocking plate 15 is perpendicular to the filter screen 11, and the side blocking plate 15 is adapted to the side wall opening of the feeding box 10.

[0031] During operation: In the initial state, when the filter screen 11 is horizontal and intercepts particles, the side blocking plate 15, which is fixedly connected to the outer wall of the rotating shaft 13 and perpendicular to the filter screen 11, tightly seals the openings on both sides of the feeding box 10, effectively preventing powder from leaking out from the side openings after entering the feeding box 10. When the filter screen 11 rotates around the rotating shaft 13 under the drive of the motor 14, the side blocking plate 15 rotates synchronously with the filter screen 11. As the side blocking plate 15 rotates, the sealing state between it and the side opening of the feeding box 10 is broken. When the filter screen 11 rotates to a suitable impurity discharge angle, the side blocking plate 15 also rotates to the corresponding position. At this time, the particles can fall smoothly from the surface of the filter screen 11 onto the side blocking plate 15. Then, the return component plays a role in effectively separating the powder mixed in with the particles on the surface of the side blocking plate 15, allowing the powder to return to the production process, while the particles are collected and processed.

[0032] like Figures 5 to 7 As shown, the diversion assembly includes a diversion plate 16, with a rotating shaft 17 fixedly connected to the inner wall of the center of the diversion plate 16. The rotating shaft 17 is rotatably connected to the inner wall of the feeding box 10. The top of the feeding box 10 is fixedly connected to a feed pipe 18, and a valve 19 is provided on the outside of the feed pipe 18. A gear assembly that can drive the rotating shaft 17 to rotate is provided between the rotating shaft 17 and one of the rotating shafts 13.

[0033] During operation: In the initial state, the guide plate 16 is tilted towards the left filter screen 11. After the raw material enters the feeding box 10 from the feed pipe 18, it will smoothly slide down the inclined surface of the guide plate 16 to the top of the left filter screen 11 for screening, ensuring that the raw material can accurately fall into the filtration area. When the left filter screen 11 is processed by the rotating shaft 13, the rotating shaft 17 will be driven to rotate by the gear assembly. When the rotating shaft 17 rotates, it will drive the guide plate 16 to rotate synchronously. After the guide plate 16 rotates, the angle of its inclined surface changes, and it tilts quickly and accurately to the right. At this time, the raw material entering the feeding box 10 will slide down the new inclined surface to the top of the right filter screen 11 for screening. This ensures that the filtration of raw materials can be seamlessly connected and continuously carried out during the impurity removal of the left filter screen 11, effectively improving the continuity and efficiency of the entire production process.

[0034] like Figures 5 to 6 As shown, the gear assembly includes a gear 20, which is fixedly connected to the outer wall of the second rotating shaft 17. A connecting rod 21 is fixedly connected to the outer wall of one of the rotating shafts 13. A rack plate 22 is fixedly connected to one end of the connecting rod 21. The teeth of the rack plate 22 can mesh with the teeth of the connecting rod 21. A sensing panel 23 is provided below the diversion plate 16 and is fixedly connected to the top of the partition plate 12.

[0035] During operation: When the left filter screen 11 needs to discharge impurities, the rotating shaft 13 rotates under the drive of the corresponding motor 14, causing the connecting rod 21 fixed on its outer wall to rotate as well. This causes the rack plate 22 at one end of the connecting rod 21 to rotate in a circular motion. When the rack plate 22 rotates, it drives the gear 20 to rotate, which in turn drives the rotating shaft 17 to rotate. The rotation of the rotating shaft 17 then drives the guide plate 16 to rotate, changing the tilt direction of the guide plate 16 so that the raw material can be switched to the right filter screen 11 for filtration. When the left filter screen 11 has finished discharging impurities and reset, the rotating shaft 13 rotates in the opposite direction, through the connecting rod 21 and the rack plate 22. The meshing transmission of gear 20 drives the rotating shaft 17 to rotate in the opposite direction, causing the guide plate 16 to rotate back to its initial tilt direction. Through the set sensing panel 23, when the guide plate 16 rotates to switch the tilt direction, once the guide plate 16 contacts the surface of the sensing panel 23, the sensing panel 23 will respond immediately and control the valve 19 to close, thereby temporarily cutting off the channel for raw materials to enter the feed box 10. This prevents the raw materials from continuing to fall into the filter chamber 34 when the guide plate 16 has not yet turned to the right filter screen 11 while the left filter screen 11 is rotating to clean impurities, thus affecting the normal operation of impurity removal and subsequent filtration.

[0036] like Figures 7 to 9As shown, the reflux assembly includes two impurity removal boxes 24, which are fixedly connected to the side of the feeding box 10. The inner wall of each impurity removal box 24 is fixedly connected to a rotating shaft 28, and the outer wall of each rotating shaft 28 is fixedly connected to a filter screen 25. An extension plate 26 is fixedly connected to one side of each filter screen 25. The extension plate 26 and the filter screen 25 are perpendicular to each other. A vibrator 32 is fixedly installed at the bottom of each filter screen 11. A drive assembly for rotating the rotating shaft 28 is provided on the outside of the impurity removal box 24.

[0037] During operation: After the left-side filter screen 11 and side blocking plate 15 have rotated, the side blocking plate 15 is perpendicular to the filter screen 25. Powder mixed in with the impurity particles, guided by gravity and the structure, will pass through the filter screen 25 and smoothly slide down the surface of the extension plate 26, which is perpendicularly fixed to it, to the bottom of the impurity removal box 24, achieving initial separation and collection of the powder. However, some impurity particles will get stuck at the junction of the side blocking plate 15 and the filter screen 25, affecting subsequent operations. Simultaneously, the vibrator 32, fixedly installed at the bottom of the filter screen 11, starts, generating a slight vibration and transmitting it to... The surface of filter screen 11 effectively prevents powder from adhering to it, ensuring the filtration effect and smooth operation of filter screen 11. After the powder is processed, the drive assembly outside the impurity removal box 24 drives the rotating shaft 28 to rotate. When the rotating shaft 28 rotates, it will drive the filter screen 25 and the extension plate 26 to rotate, so that the filter screen 25 gradually moves away from the side block plate 15. At this time, the impurity particles that were originally stuck at the junction lose their support and slide down along the surface of the side block plate 15, completing the cleaning of impurity particles and ensuring the smooth progress of the entire impurity removal and powder separation process.

[0038] like Figure 10 As shown, the drive assembly includes an arc-shaped slide block 29, which is fixedly installed on the side wall of the impurity removal box 24. The inner wall of each arc-shaped slide block 29 is slidably connected to an inner slider 31. A rotating shaft 28 is fixedly connected between the upper parts of the two inner sliders 31. An arc-shaped telescopic rod 30 is fixedly connected to the inner wall of each arc-shaped slide block 29. One end of the arc-shaped telescopic rod 30 is fixedly connected to the side of the inner slider 31.

[0039] During operation: When the powder processing is completed and impurity particles need to be cleaned, the drive component moves, the arc-shaped telescopic rod 30 is activated, and the inner slider 31 is pulled to slide along the inner wall of the arc-shaped slide block 29. The movement of the inner slider 31 will drive the rotating shaft 28 to move together, thereby causing the filter screen 25 and the extension plate 26 to rotate with the movement of the rotating shaft 28, so that the filter screen 25 moves away from the side blocking plate 15, so that the impurity particles can slide smoothly down the surface of the side blocking plate 15.

[0040] like Figures 7 to 8As shown, each of the impurity removal boxes 24 is equipped with an impurity collection box 33. The bottom of the impurity removal box 24 is fixedly connected to a return pipe 27. The end of the return pipe 27 away from the impurity removal box 24 is fixedly connected to the interior of the extrusion box 1.

[0041] During operation: The powder sieved through the second filter screen 25 will fall along the inclined surface of the extension plate 26 into the return pipe 27, and then flow directly into the extrusion box 1 for extrusion production. After the second filter screen 25 and the extension plate 26 rotate, the bottom end of the second filter screen 25 will not be blocked, and the impurity particles will fall along the inclined surface of the side block plate 15 into the collection box 33 for collection.

[0042] like Figures 1 to 2 As shown, the bottom of the extrusion box 1 is fixedly connected to the housing 7. The outer wall of the housing 7 is provided with a control panel 9. The inside of the housing 7 is provided with a collection box 8. The collection box 8 is slidably connected to the inner wall of the housing 7. The collection box 8 is located directly below the discharge port 6.

[0043] During operation: The control panel 9 controls the servo motor 4. After the servo motor 4 runs stably according to the instructions of the control panel 9, it provides power to the entire extrusion device, drives the internal spiral pushing structure and other components to work, and extrudes the raw material from the extrusion box 1 and discharges it through the discharge port 6. The material discharged from the discharge port 6 falls directly into the collection box 8 located directly below it, so that the operator can easily pull it out of the machine box 7 after a certain amount of material has been collected.

[0044] 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 illustrative of the 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 present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous powder coating production apparatus based on twin-screw extrusion, comprising an extrusion chamber, characterized in that: A pair of extrusion screws are rotatably connected inside the extrusion box. Output gears are fixedly connected to the outer walls of the shafts of the extrusion screws, and the teeth of the two output gears mesh with each other. A servo motor is fixedly installed on one side of the extrusion box, and the output shaft of the servo motor is fixedly connected to the shaft of one of the extrusion screws. A feed hopper is fixedly connected to the top of the extrusion box, and a discharge port is fixedly connected to the bottom of the extrusion box. A waste removal component is set above the feed hopper. The waste removal component includes two rotatable filter screens. After the filter screens rotate, they can process the particles intercepted on their upper surface. A flow diversion component is set above the feed hopper. The flow diversion component can flexibly control the flow path of the raw materials. A return component is set outside the feed hopper to process and return the raw materials mixed in with the particles.

2. The continuous powder coating production apparatus based on twin-screw extrusion according to claim 1, characterized in that: A feeding box is fixedly connected to the top of the feeding hopper. A partition plate is fixedly installed inside the feeding box, which divides the inside of the feeding box into a filter chamber one and a filter chamber two. Two filter screens are located inside the filter chamber one and the filter chamber two respectively, and one end of the filter screen is attached to one side of the partition plate.

3. A continuous powder coating production apparatus based on twin-screw extrusion according to claim 2, characterized in that: The impurity removal assembly includes two motors, both of which are fixedly installed on the outer wall of the feeding box. The output shaft of each motor is fixedly connected to a rotating shaft, which is rotatably connected to the inner walls of both sides of the feeding box. The outer wall of the rotating shaft is fixedly connected to the inner wall of one end of the filter screen.

4. A continuous powder coating production apparatus based on twin-screw extrusion according to claim 3, characterized in that: Side blocking plates are fixedly connected to the outer wall of the rotating shaft. The side blocking plates are perpendicular to the filter screen and are adapted to the side wall opening of the feeding box.

5. A continuous powder coating production apparatus based on twin-screw extrusion according to claim 4, characterized in that: The diversion assembly includes a diversion plate, with a rotating shaft two fixedly connected to the inner wall of the center of the diversion plate. The rotating shaft two is rotatably connected to the inner wall of the feeding box. A feed pipe is fixedly connected to the top of the feeding box. A valve is installed on the outside of the feed pipe. A gear assembly that can drive the rotating shaft two to rotate is installed between the rotating shaft two and one of the rotating shafts one.

6. A continuous powder coating production apparatus based on twin-screw extrusion according to claim 5, characterized in that: The gear assembly includes a gear, which is fixedly connected to the outer wall of the second rotating shaft. A connecting rod is fixedly connected to the outer wall of one of the rotating shafts. A rack plate is fixedly connected to one end of the connecting rod. The teeth of the rack plate can mesh with the teeth of the connecting rod. A sensing panel is provided below the diversion plate and is fixedly connected to the top of the partition plate.

7. A continuous powder coating production apparatus based on twin-screw extrusion according to claim 6, characterized in that: The reflux assembly includes two impurity removal boxes, which are fixedly connected to the side of the feeding box. The inner wall of each impurity removal box is fixedly connected to a rotating shaft three, and the outer wall of each rotating shaft three is fixedly connected to a filter screen two. An extension plate is fixedly connected to one side of each filter screen two, and the extension plate is perpendicular to the filter screen two. A vibrator is fixedly installed at the bottom of each filter screen one. A drive assembly for rotating the rotating shaft three is provided on the outside of the impurity removal box.

8. A continuous powder coating production apparatus based on twin-screw extrusion according to claim 7, characterized in that: The drive assembly includes an arc-shaped slide block, which is fixedly installed on the side wall of the cleaning box. The inner wall of each arc-shaped slide block is slidably connected to an inner slider. The rotating shaft is fixedly connected between the top of the two inner sliders. An arc-shaped telescopic rod is fixedly connected to the inner wall of each arc-shaped slide block, and one end of the arc-shaped telescopic rod is fixedly connected to the side of the inner slider.

9. A continuous powder coating production apparatus based on twin-screw extrusion according to claim 8, characterized in that: The interior of each impurity removal box is equipped with an impurity collection box. The bottom of the impurity removal box is fixedly connected to a return pipe, and the end of the return pipe away from the impurity removal box is fixedly connected to the interior of the extrusion box.

10. A continuous powder coating production apparatus based on twin-screw extrusion according to claim 9, characterized in that: The bottom of the extrusion box is fixedly connected to the machine box. The control panel is set on the outer wall of the machine box. The collection box is set inside the machine box and is slidably connected to the inner wall of the machine box. The collection box is located directly below the discharge port.

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