Mixing equipment for surface functionalization modified plastic particles

Abstract

The invention discloses mixing equipment for surface functionalization modified plastic particles, and belongs to the field of modified plastic production, the mixing equipment comprises a base, a mixing cylinder is arranged above the base, and circular plates are fixedly mounted at the upper end and the lower end of the mixing cylinder; the device further comprises an overturning assembly, the overturning assembly comprises fixing frames fixedly installed on the two sides of the mixing barrel respectively, rotating rods are fixedly installed on the opposite sides of the two fixing frames, a first annular plate is fixedly installed at the top of the base, teeth are evenly arranged and installed on one side of the first annular plate in the circumferential direction, and the rotating rods are fixedly installed on the other side of the first annular plate. Each group of teeth form a closed annular array; according to the method, the mixing container can be turned over, it is ensured that each plastic particle can obtain ideal surface modification treatment, the quality consistency of products is improved, resource waste is reduced, meanwhile, the production efficiency is improved, and the risk of environmental pollution can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of modified plastic production, and more specifically, to a mixing device for surface-functionalized modified plastic particles. Background Art

[0002] Modified plastic particles refer to plastic particles obtained by adding various additives to a base resin through physical, chemical, or a combination of both methods to improve or enhance certain properties of the plastic, thereby meeting specific application requirements. The modification process can endow the plastic with new characteristics, and the production of modified plastic particles can be achieved through two main methods: the first is to directly add additives at the raw material stage, perform melt mixing, and then granulate; the second is to mix modifier powder on the surface of existing plastic particles.

[0003] Regarding the second method, in the plastics industry, in order to endow plastic materials with specific functional characteristics, it is often necessary to perform surface functionalization treatment on plastic particles. This process usually involves uniformly attaching modifier powder to the surface of plastic particles to achieve the desired functional effect. Traditional mixing of plastic particles and modifier powder mostly uses a simple mechanical stirring method. In this way, due to the density difference between the modifier powder and the plastic particles, the modifier powder is prone to gradually settle to the bottom of the mixing container under the action of gravity, and cannot effectively cover the plastic particles located in the upper part of the container. In this case, the uneven distribution of the modifier powder will occur, resulting in large fluctuations in the physical and chemical properties of the final product, making it difficult to ensure consistent quality standards. This phenomenon not only leads to uneven mixing but also causes waste of raw materials, thereby increasing production costs. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a mixing device for surface-functionalized modified plastic particles, which can flip the mixing container to ensure that each plastic particle can obtain an ideal surface modification treatment. This method not only improves the quality consistency of the product, but also reduces resource waste, while enhancing production efficiency and helping to reduce the risk of environmental pollution.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A mixing device for surface-functionalized modified plastic particles, including a base, above which a mixing cylinder is provided, and circular plates are fixedly installed at both the upper and lower ends of the mixing cylinder;

[0007] It further includes:

[0008] Turning assembly, the turning assembly includes fixed frames respectively fixedly installed on both sides of the mixing cylinder. Rotating rods are fixedly installed on the opposite sides of the two groups of fixed frames. A first annular plate is fixedly installed on the top of the base. Teeth are evenly arranged along the circumferential direction on one side of the first annular plate. Each group of teeth forms a closed annular array. A gear meshing with the teeth is arranged below the mixing cylinder. A rotating rod is fixedly installed on the top of the gear. The other end of the rotating rod penetrates through the lower circular plate and is rotatably installed with the upper circular plate. Stirring rods are evenly fixedly installed on the rod wall of the rotating rod. An air supply assembly is arranged in the first annular plate.

[0009] Further, the air supply assembly includes cavities opened in the upper and lower sides inside the first annular plate. Fixed cavities are opened in both groups of circular plates. Through holes communicating with the adjacent fixed cavities are opened on the opposite sides of the two groups of circular plates. A second annular plate is rotatably installed on the inner wall of the first annular plate. Connecting pipes are fixedly installed on one side of the two groups of circular plates. The other ends of the two groups of connecting pipes penetrate through the second annular plate and are communicated with the inner cavities of the adjacent cavities. A fixed pipe is fixedly installed at the bottom on one side of the first annular plate. A blower is installed in the fixed pipe. An air blowing port is opened on the side wall of the first annular plate. The two ends of the air blowing port are respectively communicated with the fixed pipe and the inner cavity of the lower cavity. An exhaust hole communicating with the upper cavity is opened on the top of the first annular plate;

[0010] Support plates are rotatably installed on the opposite sides of the two groups of rotating rods. Both groups of support plates are fixedly installed on the top of the base. A motor is fixedly installed on the side wall of one of the support plates. The output shaft of the motor is fixedly installed with the adjacent rotating rod.

[0011] Further, counterweight blocks are slidably installed in the inner cavities of the two groups of fixed frames. Both groups of counterweight blocks are in contact with the bottom walls of the inner cavities of the fixed frames. Semi-circular blocks are slidably installed on the opposite sides of the two groups of counterweight blocks. Both groups of semi-circular blocks are in contact with the inner cavity walls of the adjacent fixed frames. Return springs are fixedly installed between the two groups of semi-circular blocks and the adjacent counterweight blocks. Arc-shaped blocks fixedly installed with the adjacent fixed frames are evenly arranged on the upper sides of the two groups of semi-circular blocks.

[0012] Further, first filter nets are fixedly installed on the opposite sides of the two groups of circular plates. Brush plates are in contact with the opposite sides of the two groups of first filter nets. Both groups of brush plates are fixedly installed with the rotating rod.

[0013] Further, a scraping plate is in contact with the inner wall of the mixing cylinder. The scraping plate is fixedly installed with one of the stirring rods.

[0014] Further, two movable doors are sealed and installed on the upper part of the outer wall of the mixing cylinder, and grooves are formed on the opposite sides of the two movable doors.

[0015] Further, the two cavities are not communicated with each other, and the two cavities are arranged vertically.

[0016] Further, a second filter screen is fixedly installed at one end of the fixed pipe away from the first annular plate.

[0017] Further, the reset spring is in a compressed state under the initial condition.

[0018] Further, the gravity of the counterweight is greater than the elastic force of the reset spring.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) In the process of the vertical rotation of the mixing cylinder, through the cooperation of the gear and each set of teeth, the stirring rod can stir and mix the basic plastic particles and the modifier powder. Through the combination of the vertical rotation and flipping of the mixing cylinder and the horizontal stirring of the stirring rod, the plastic particles and the modifier powder can be mixed from multiple dimensions, significantly improving the mixing uniformity. Especially for materials with large density differences, it can ensure that each plastic particle can obtain an ideal surface modification treatment. This method not only improves the quality consistency of the product, reduces resource waste, but also improves the production efficiency and helps to reduce the risk of environmental pollution.

[0021] (2) In the process of the vertical rotation and flipping of the mixing cylinder, the air blower blows air into the lower cavity. When the lower connecting pipe is communicated with the lower cavity, the gas in the inner cavity of the lower cavity can be discharged into the lower fixed cavity through the lower connecting pipe, and then the gas will be discharged upward through each set of through holes on the lower side. Blowing the gas from bottom to top helps to re-suspend the modifier powder that has settled to the bottom, preventing it from aggregating in a certain area, promoting the uniform mixing of the modifier and the plastic particles, and at the same time increasing the relative movement between the plastic particles and the modifier powder, breaking the cohesive force between the materials, making the materials looser, and thus improving the overall fluidity.

[0022] (3) During the vertical rotation and flipping of the mixing cylinder in this solution, the fixed frame will be driven to move synchronously. During the process of the counterweight driving the semi-circular block to slide downward, through the setting of multiple groups of arc-shaped blocks, the semi-circular block can be made to repeatedly impact the inner cavity wall of the fixed frame and generate vibrations. The vibrations of the mixing cylinder help to remove the "dead zones" in the mixing cylinder, that is, those areas that are difficult to be directly touched by the stirring rods. This ensures that all materials can participate in the mixing process, reduces the risk of uneven mixing, can effectively break the material stratification phenomenon caused by density differences, can continuously disperse and redistribute the materials, ensures sufficient exchange between the upper and lower layers of materials, and further improves the uniformity of the distribution of the modifier powder. Description of the Drawings

[0023] Figure 1 is the first overall structural schematic diagram of the present invention;

[0024] Figure 2 is the cross-sectional view of the first ring plate of the present invention;

[0025] Figure 3 is the overall cross-sectional view of the present invention;

[0026] Figure 4 is of the present invention Figure 3 enlarged view of the structure of part A;

[0027] Figure 5 is of the present invention Figure 3 enlarged view of the structure of part B;

[0028] Figure 6 is the second overall structural schematic diagram of the present invention;

[0029] Figure 7 is the overall side view of the present invention;

[0030] Figure 8 is the side cross-sectional view of the first ring plate of the present invention.

[0031] Explanation of the reference numerals in the drawings:

[0032] 1. Base; 2. Mixing cylinder; 3. Fixed frame; 4. Rotating rod; 5. Support plate; 6. Motor; 7. First ring plate; 8. Circular plate; 9. Rotating rod; 10. Stirring rod; 11. Gear; 12. Tooth; 13. Activity door; 14. Groove; 15. Second ring plate; 16. Cavity; 17. Connecting pipe; 18. Fixed cavity; 19. Through hole; 20. Fixed pipe; 21. Fan; 22. Exhaust hole; 23. Counterweight; 24. Semi-circular block; 25. Return spring; 26. Arc-shaped block; 27. Scraper; 28. First filter screen; 29. Brush plate; 30. Second filter screen; 31. Air blowing port. Detailed Embodiments

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 to 8 , a mixing device for surface-functionalized modified plastic particles, including a base 1, above which a mixing cylinder 2 is arranged, and circular plates 8 are fixedly installed at both the upper and lower ends of the mixing cylinder 2;

[0035] It further includes:

[0036] A flipping assembly, which includes fixing frames 3 fixedly installed on both sides of the mixing cylinder 2 respectively. Rotating rods 4 are fixedly installed on the opposite sides of the two groups of fixing frames 3. A circular ring plate one 7 is fixedly installed on the top of the base 1. Teeth 12 are uniformly arranged along the circumferential direction on one side of the circular ring plate one 7. Each group of teeth 12 forms a closed circular array. A gear 11 meshing with the teeth 12 is arranged below the mixing cylinder 2. A rotating rod 9 is fixedly installed on the top of the gear 11. The other end of the rotating rod 9 penetrates through the lower circular plate 8 and is rotatably installed with the upper circular plate 8. Stirring rods 10 are uniformly fixedly installed on the rod wall of the rotating rod 9. An air supply assembly is arranged inside the circular ring plate one 7.

[0037] The air supply assembly includes cavities 16 opened in the upper and lower sides inside the circular ring plate one 7. Fixed cavities 18 are opened in both circular plates 8. Through holes 19 communicating with the adjacent fixed cavities 18 are opened on the opposite sides of the two circular plates 8. A circular ring plate two 15 is rotatably installed on the inner wall of the circular ring plate one 7. Connecting pipes 17 are fixedly installed on one side of the two circular plates 8. The other ends of the two connecting pipes 17 penetrate through the circular ring plate two 15 and are communicated with the inner cavities of the adjacent cavities 16. A fixed pipe 20 is fixedly installed at the bottom on one side of the circular ring plate one 7. A fan 21 is installed inside the fixed pipe 20. An air blowing port 31 is opened on the side wall of the circular ring plate one 7. The two ends of the air blowing port 31 are respectively communicated with the fixed pipe 20 and the inner cavity of the lower cavity 16. An exhaust hole 22 communicating with the upper cavity 16 is opened on the top of the circular ring plate one 7;

[0038] Support plates 5 are rotatably installed on the opposite sides of the two rotating rods 4. The two support plates 5 are both fixedly installed on the top of the base 1. A motor 6 is fixedly installed on the side wall of one support plate 5. The output shaft of the motor 6 is fixedly installed with the adjacent rotating rod 4.

[0039] When preparing modified plastic particles by mixing, first pour the prepared base plastic particles and modifier powder into the mixing cylinder 2. Then, after sealing the mixing cylinder 2, start the motor 6. The output shaft of the motor 6 will drive the rotating rod 4 to rotate. The rotating rod 4 will drive the mixing cylinder 2 to rotate synchronously through the fixed frame 3. While the mixing cylinder 2 is rotating, it will drive the gear 11 to move synchronously through the rotating rod 9. At this time, the rotating rod 9 will drive the gear 11 to move circumferentially on the right side wall of the first circular ring plate 7. The gear 11 will move on the path where the tooth rows 12 form an annular array. Through the cooperation of the gear 11 and each tooth row 12, the mixing cylinder 2 will drive the gear 11 to rotate during the rotation process. While the gear 11 is rotating, it will drive each stirring rod 10 to rotate in the inner cavity of the mixing cylinder 2 through the rotating rod 9, which can realize the stirring and mixing of the base plastic particles and the modifier powder inside the stirring rod 10. During the mixing process, due to the density difference between the modifier powder and the plastic particles, the modifier powder is likely to gradually settle to the bottom of the inner cavity of the mixing cylinder 2 due to the action of gravity. By vertically rotating the mixing cylinder 2, the upper and lower ends of the mixing cylinder 2 can be gradually flipped. When the mixing cylinder 2 is in a vertical state, the modifier powder will fall onto the bottom wall of the inner cavity of the mixing cylinder 2 at this time. When the mixing cylinder 2 continues to rotate and the two ends are flipped, the upper and lower ends of the mixing cylinder 2 are interchanged at this time, and the collected modifier powder moves to the upper side and then drops downward. The vertical flipping action can break the phenomenon that the modifier powder is deposited at the bottom due to the action of gravity, ensuring that the modifier powder is always in a dynamic distribution state, thereby avoiding local aggregation or unevenness. Through the combination of horizontal stirring and vertical flipping, the plastic particles and the modifier powder can be mixed from multiple dimensions, significantly improving the mixing uniformity. Especially for materials with a large density difference, it can ensure that each plastic particle can obtain an ideal surface modification treatment. This method not only improves the quality consistency of the product, but also reduces resource waste, while enhancing the production efficiency and helping to reduce the risk of environmental pollution;

[0040] During the vertical rotation of the mixing cylinder 2 driven by the rotating rod 4 through the fixed frame 3, the two groups of circular plates 8 on the mixing cylinder 2 will move synchronously while the mixing cylinder 2 rotates. The two groups of circular plates 8 will respectively drive the second circular ring plate 15 to rotate on the inner wall of the first circular ring plate 7 through the connecting pipes 17 thereon. The blower 21 is turned on, and the blower 21 will suck the external gas through the fixed pipe 20, and the gas will be discharged into the lower cavity 16 through the air blowing port 31. When the mixing cylinder 2 rotates to the vertical state or an approximately vertical state, at this time, the lower connecting pipe 17 will be in a communicating state with the inner cavity of the lower cavity 16, and the upper connecting pipe 17 will be in a communicating state with the inner cavity of the upper cavity 16. It can be realized that the gas in the inner cavity of the lower cavity 16 will be discharged into the lower fixed cavity 18 through the lower connecting pipe 17, and then the gas will be discharged upward through the lower groups of through holes 19. Blowing the gas upward from bottom to top helps to resuspend the modifier powder that has settled to the bottom, prevent it from aggregating in a certain area, promote the uniform mixing of the modifier and the plastic particles, and at the same time increase the relative movement between the plastic particles and the modifier powder, break the cohesive force between the materials, make the materials looser, and thus improve the overall fluidity. When the gas is discharged into the mixing cylinder 2, the excess gas in the mixing cylinder 2 will correspondingly be discharged into the upper fixed cavity 18 through the upper groups of through holes 19 at this time. The gas in the upper fixed cavity 18 will be discharged into the upper cavity 16 through the upper connecting pipe 17, and then the gas in the upper cavity 16 will be discharged into the outside through the exhaust holes 22. When the mixing cylinder 2 continues to rotate to a non-vertical state or a non-approximately vertical state, the two groups of circular plates 8 will respectively drive the second circular ring plate 15 to rotate through the connecting pipes 17 thereon, which will cause the two groups of connecting pipes 17 to be away from the two cavities 16 respectively. At this time, the two groups of connecting pipes 17 will be in a blocked state and stop supplying and exhausting gas, and the gas blown into the lower cavity 16 by the blower 21 will flow back to the outside through the fixed pipe 20.

[0041] As Figure 3 and Figure 5 As shown, counterweight blocks 23 are slidably installed in the inner cavities of the two groups of fixed frames 3. The two groups of counterweight blocks 23 are both in contact with the bottom walls of the inner cavities of the fixed frames 3. Semi-circular blocks 24 are slidably installed on the opposite sides of the two groups of counterweight blocks 23. The two groups of semi-circular blocks 24 are both in contact with the inner cavity walls of the adjacent fixed frames 3. Return springs 25 are fixedly installed between the two groups of semi-circular blocks 24 and the adjacent counterweight blocks 23. Arc-shaped blocks 26 fixedly installed with the adjacent fixed frames 3 are uniformly arranged on the upper sides of the two groups of semi-circular blocks 24.

[0042] In the initial state, the mixing cylinder 2 is in a vertical state. At this time, the counterweight 23 is located at the inner cavity bottom wall of the fixed frame 3. During the process of the rotating rod 4 driving the mixing cylinder 2 to rotate vertically through the fixed frame 3, when the top and bottom of the mixing cylinder 2 are flipped and exchanged, at this time, the counterweight 23 will be flipped to the upper side. Under the gravity of the counterweight 23 itself, the counterweight 23 will drive the semi-circular block 24 to slide downward on the inner cavity wall of the fixed frame 3. When the arc surface of the semi-circular block 24 contacts the arc surface of the arc-shaped block 26, under the gravity of the counterweight 23 itself, the counterweight 23 will drive the semi-circular block 24 to continue to move downward on the arc surface of the arc-shaped block 26. It can be realized that the semi-circular block 24 will be squeezed by the arc-shaped block 26 to slide towards one side of the counterweight 23 and squeeze the return spring 25. When the semi-circular block 24 detaches from the arc-shaped block 26, under the action of the return spring 25, the return spring 25 returns to its initial state and will push the semi-circular block 24 to slide towards the side away from the counterweight 23 to the initial position. It can be realized that the semi-circular block 24 impacts the inner cavity wall of the fixed frame 3. At this time, during the process of the counterweight 23 driving the semi-circular block 24 to slide downward, through the arrangement of multiple groups of arc-shaped blocks 26, it can be realized that the semi-circular block 24 repeatedly impacts the inner cavity wall of the fixed frame 3 and generates vibrations. The shock waves will be transmitted to the mixing cylinder 2. The vibration of the mixing cylinder 2 helps to remove the "dead zones" in the mixing cylinder 2, that is, those areas that are difficult to be directly touched by the stirring rods 10. This ensures that all materials can participate in the mixing process, reduces the risk of uneven mixing, can effectively break the material stratification phenomenon caused by density differences, can continuously disperse and redistribute the materials, ensure the full exchange between the upper and lower layer materials, and further improve the uniformity of the distribution of the modifier powder.

[0043] As Figure 3 and Figure 4 shown, filter meshes one 28 are fixedly installed on the opposite sides of the two groups of circular plates 8. Brush plates 29 are in contact with the opposite sides of the two groups of filter meshes one 28. The two groups of brush plates 29 are fixedly installed with the rotating rod 9.

[0044] A scraper 27 is in contact with the inner wall of the mixing cylinder 2. The scraper 27 is fixedly installed with one of the stirring rods 10.

[0045] Through the arrangement of the filter meshes one 28, it can be realized to filter the modifier powder in the mixing cylinder 2 to prevent it from blocking each through hole 19. When blowing air upward through each through hole 19 that is flipped to the lower side, it can be realized to blow air in the reverse direction to the through hole 19 for plugging removal work. While the rotating rod 9 rotates, it will drive the brush plate 29 to rotate synchronously. The rotation of the brush plate 29 can realize the cleaning of the surface of the filter mesh one 28, and further realize the plugging removal. With the cooperation of blowing air through the through hole 19, the cleaning effect on the filter mesh one 28 can be effectively improved, thus avoiding the waste of the modifier powder;

[0046] While the rotating rod 9 rotates, it will also drive the scraper 27 to rotate synchronously, enabling the scraper 27 to scrape the inner wall of the movable door 13. The scraper 27 can effectively remove the materials adhering to the inner wall of the mixing cylinder 2, especially those easily adherent modifier powders or plastic particles. At the same time, with the cooperation of the vibration of the mixing cylinder 2, the residual modifier powder on the inner wall of the mixing cylinder 2 can be effectively removed. This helps to reduce material loss and ensure that all materials can participate in the mixing process. At the same time, it can also simplify the cleaning work of the equipment after the production is completed. It can effectively remove the residues on the inner wall, reducing the cleaning time and water consumption.

[0047] As Figure 7 and Figure 8 shown, two groups of movable doors 13 are sealed and installed on the upper part of the outer wall of the mixing cylinder 2, and grooves 14 are provided on the opposite sides of the two groups of movable doors 13.

[0048] The two cavities 16 are not connected, and the two cavities 16 are arranged vertically.

[0049] Through the groove 14, the movable door 13 can be opened to add modifier powder and plastic particles into the mixing cylinder 2. When it is necessary to take out the modified plastic particles after mixing in the mixing cylinder 2, the motor 6 is started. The output end of the motor 6 drives the fixed frame 3 and the mixing cylinder 2 to rotate through the rotating rod 4, so that the movable door 13 on the mixing cylinder 2 moves to the lower side, and the mixing cylinder 2 is in a vertical state. Then, a collection frame for collecting modified plastic particles can be placed under the movable door 13 at the top of the base 1. Then, the movable door 13 can be opened through the groove 14, and the modified plastic particles in the mixing cylinder 2 can be taken out.

[0050] As Figure 3 and Figure 5 shown, a second filter screen 30 is fixedly installed at one end of the fixed pipe 20 away from the first circular ring plate 7.

[0051] The return spring 25 is in a compressed state in its initial state.

[0052] The gravity of the counterweight 23 is greater than the elastic force of the return spring 25.

[0053] Through the setting of the second filter screen 30, the gas sucked into the fixed pipe 20 by the fan 21 can be filtered. When the gas discharged into the lower cavity 16 through the air blowing port 31 by the fan 21 cannot be discharged, the gas will flow back into the fixed pipe 20 again through the air blowing port 31 and then be discharged through the second filter screen 30. At this time, a reverse blowing force can be formed on the second filter screen 30, and the second filter screen 30 can be cleaned in the reverse direction to prevent the second filter screen 30 from being blocked.

[0054] Working principle: First, open the movable door 13 and pour the prepared basic plastic particles and modifier powder into the mixing cylinder 2. Then, close the movable door 13 and turn on the motor 6 and the blower 21. When the motor 6 works, it will drive the mixing cylinder 2 to rotate through the rotating rod 4. Through the cooperation of the gear 11 and the tooth 12, during the vertical rotation and flipping of the mixing cylinder 2, the rotating rod 9 will drive the stirring rod 10 to rotate horizontally for stirring. When the blower 21 works, it will suck the external gas and discharge it into the lower cavity 16. When the mixing cylinder 2 drives the two connecting pipes 17 to rotate and communicate with the two upper cavities 16 respectively, the gas in the lower cavity 16 will be discharged into the lower fixed cavity 18 through the lower connecting pipe 17. The gas will blow upward in the mixing cylinder 2 through the lower through holes 19. The excess gas in the mixing cylinder 2 will finally be discharged into the upper cavity 16 and discharged through the exhaust hole 22. The filter screen 28 can prevent the modifier powder from blocking the through holes 19. When the rotating rod 9 rotates, it will drive the brush plate 29 to rotate to clean the filter screen 28, and at the same time, it will also drive the scraping plate 27 to rotate to remove the residual modifier powder on the inner wall of the mixing cylinder 2. During the flipping process of the mixing cylinder 2, the fixed frame 3 will move synchronously with it. Under the action of the gravity of the counterweight 23, through the cooperation of the semi-circular block 24 and the arc-shaped block 26 and the action of the return spring 25, the semi-circular block 24 can reciprocally impact the inner wall of the fixed frame 3 and generate vibration for the mixing cylinder 2. When it is necessary to take out the modified plastic particles mixed in the mixing cylinder 2, control the mixing cylinder 2 to flip so that the movable door 13 moves to the lower side, and then open the movable door 13 to take out the modified plastic particles.

[0055] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A mixing device for surface-functionalized modified plastic particles, comprising a base (1), above which a mixing cylinder (2) is arranged, and circular plates (8) are fixedly installed at both the upper and lower ends of the mixing cylinder (2); It is characterized in that: It further includes: A flipping assembly, which includes fixed frames (3) respectively fixedly installed on both sides of the mixing cylinder (2). Rotating rods (4) are fixedly installed on the opposite sides of the two fixed frames (3). A circular ring plate one (7) is fixedly installed on the top of the base (1). Teeth (12) are arranged uniformly along the circumferential direction on one side of the circular ring plate one (7). Each group of the teeth (12) forms a closed circular array. A gear (11) meshing with the teeth (12) is arranged below the mixing cylinder (2). A rotating rod (9) is fixedly installed on the top of the gear (11). The other end of the rotating rod (9) passes through the lower circular plate (8) and is rotatably installed with the upper circular plate (8). Stirring rods (10) are uniformly fixedly installed on the rod wall of the rotating rod (9). An air supply assembly is arranged inside the circular ring plate one (7).

2. The mixing device for surface-functionalized modified plastic particles according to claim 1, characterized in that: The air supply assembly includes cavities (16) opened in the upper and lower sides inside the circular ring plate one (7). Fixed cavities (18) are opened in both circular plates (8). Through holes (19) communicating with the adjacent fixed cavities (18) are opened on the opposite sides of the two circular plates (8). A circular ring plate two (15) is rotatably installed on the inner wall of the circular ring plate one (7). Connecting pipes (17) are fixedly installed on one side of each of the two circular plates (8). The other ends of the two connecting pipes (17) pass through the circular ring plate two (15) and are communicated with the inner cavities of the adjacent cavities (16). A fixed pipe (20) is fixedly installed at the bottom on one side of the circular ring plate one (7). A blower (21) is installed inside the fixed pipe (20). An air blowing port (31) is opened on the side wall of the circular ring plate one (7). The two ends of the air blowing port (31) are respectively communicated with the fixed pipe (20) and the inner cavity of the lower cavity (16). An exhaust hole (22) communicating with the upper cavity (16) is opened on the top of the circular ring plate one (7); Support plates (5) are rotatably installed on the opposite sides of the two rotating rods (4). The two support plates (5) are both fixedly installed on the top of the base (1). A motor (6) is fixedly installed on the side wall of one support plate (5). The output shaft of the motor (6) is fixedly installed with the adjacent rotating rod (4).

3. The mixing device for surface-functionalized modified plastic particles according to claim 2, characterized in that: A counterweight block (23) is slidably installed in the inner cavity of each of the two groups of fixed frames (3). The two groups of counterweight blocks (23) are both in contact with the bottom wall of the inner cavity of the fixed frame (3). A semi-circular block (24) is slidably installed on the opposite side of each of the two groups of counterweight blocks (23). The two groups of semi-circular blocks (24) are both in contact with the inner cavity wall of the adjacent fixed frame (3). A return spring (25) is fixedly installed between each of the two groups of semi-circular blocks (24) and the adjacent counterweight block (23). An arc-shaped block (26) fixedly installed with the adjacent fixed frame (3) is evenly arranged on the upper side of each of the two groups of semi-circular blocks (24).

4. The mixing device for surface-functionalized modified plastic particles according to claim 2, characterized in that: A first filter screen (28) is fixedly installed on the opposite sides of the two groups of circular plates (8). A brush plate (29) is in contact with the opposite sides of the two groups of first filter screens (28). The two groups of brush plates (29) are both fixedly installed on the rotating rod (9).

5. The mixing device for surface-functionalized modified plastic particles according to claim 1, characterized in that: A scraping plate (27) is in contact with the inner wall of the mixing cylinder (2). The scraping plate (27) is fixedly installed on one of the stirring rods (10).

6. The mixing device for surface-functionalized modified plastic particles according to claim 1, characterized in that: Two movable doors (13) are hermetically installed on the upper part of the outer wall of the mixing cylinder (2). Grooves (14) are formed on the opposite sides of the two movable doors (13).

7. The mixing device for surface-functionalized modified plastic particles according to claim 2, characterized in that: The two cavities (16) are not communicated with each other, and the two cavities (16) are arranged vertically.

8. The mixing device for surface-functionalized modified plastic particles according to claim 2, characterized in that: A second filter screen (30) is fixedly installed at one end of the fixed pipe (20) away from the first ring plate (7).

9. The mixing device for surface-functionalized modified plastic particles according to claim 3, characterized in that: The return spring (25) is in a compressed state in its initial state.

10. The mixing device for surface-functionalized modified plastic particles according to claim 3, characterized in that: The gravity of the counterweight block (23) is greater than the elastic force of the return spring (25).

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