A biodegradable plastic masterbatch processing device

Abstract

This invention relates to the field of environmentally friendly materials technology, and more particularly to a biodegradable plastic masterbatch processing device. The invention provides such a device, comprising: a base with a fixing frame at the top; and a fixing shell with a fixing shell located on the lower inner side of the fixing frame. This invention uses the limiting shell to move the plastic masterbatch, causing it to contact the extrusion rollers and undergo extrusion deformation, creating indentations that prevent contact with the outside environment. After extrusion processing, the surface area of ​​the plastic masterbatch is increased, facilitating subsequent adhesion processing. Furthermore, when different plastic masterbatches are extruded by the extrusion rollers, they move towards the inner wall of the limiting shell, ensuring that different sizes of plastic masterbatches are compressed to varying degrees, thus achieving a suitable volume-to-surface-area ratio for subsequent adhesion processing.

Description

Technical Field

[0001] This invention relates to the field of environmentally friendly materials technology, and in particular to a biodegradable plastic masterbatch processing device. Background Technology

[0002] Biodegradable plastics are plastics that degrade under natural conditions through the action of certain microorganisms in nature, such as bacteria, fungi, and algae.

[0003] Traditional biodegradable plastics are usually made from natural biomass as the base material. In the production of biodegradable plastics, other raw materials are usually added to the plastic masterbatch or special treatment is carried out. Then, the processed plastic masterbatch is fed into the machine with other raw materials for melting and processing to produce some biodegradable plastic products with other advantages.

[0004] Chinese patent CN111100437B discloses a method for preparing biodegradable plastic masterbatch containing nanocellulose, relating to the field of biodegradable plastic processing and preparation, specifically, a method for preparing masterbatch of nanocellulose composite biodegradable plastic. The method involves uniformly mixing biodegradable plastic particles and a plasticizer under heating conditions, adding a certain amount of nanocellulose dispersion obtained by mechanical or chemical methods, and then drying the mixture at room temperature or under heating conditions to obtain a masterbatch containing nanocellulose with a solid content of up to 99%. The resulting masterbatch has a reinforcing effect and can be added to polylactic acid, polyadipate, etc. In biodegradable plastics such as butylene terephthalate, this reduces the amount of biodegradable plastic particles used and lowers production costs.

[0005] Although the aforementioned patent can process a certain amount of polylactic acid particles to obtain polylactic acid masterbatch containing nanocellulose, and then mix it with additives and ordinary polylactic acid particles to produce low-cost plastic products, its actual processing has certain defects. Because traditional polylactic acid particles are usually columnar particles with relatively smooth surfaces, the dispersion has poor adhesion to the surface of the plastic masterbatch and is difficult to accumulate on the surface of the plastic masterbatch. Furthermore, the collision between plastic masterbatches can easily cause the dried dispersion to fall off. Moreover, the volume-to-surface area ratio of plastic masterbatches of different specifications is different, making it difficult to effectively control the addition ratio of the dispersion by having the dispersion adhere to the surface of the plastic masterbatch.

[0006] Therefore, it is necessary to design a biodegradable plastic masterbatch treatment device that can improve the adhesion of masterbatch surface to solve the above problems. Summary of the Invention

[0007] In order to overcome the shortcomings of traditional plastic masterbatch adhesive additives and the difficulty in controlling the addition ratio of additives by having additives adhere to the surface of plastic masterbatches of different specifications, the technical problem of the present invention is to provide a biodegradable plastic masterbatch processing device.

[0008] Technical Solution: A biodegradable plastic masterbatch processing device includes: a base and a fixing frame. The fixing frame is located on the top of the base, and a fixing shell is located inside the fixing frame. The fixing shell has an inlet hole at the top and an outlet at the bottom. A motor is located at the bottom of the fixing shell. A rotating shaft is rotatably mounted on the fixing shell and connected to the output shaft of the motor. An extrusion wheel is located in the middle of the rotating shaft. The extrusion wheel is composed of multiple extrusion plates stacked together. A rotating ring is rotatably mounted inside the fixing shell. Multiple limiting shells are located inside the rotating ring. A gear is located at the top of the rotating shaft. A connecting ring is connected to the outside of the rotating ring. A toothed ring is located inside the connecting ring and meshes with the gear. A feeding component is located on the top inner side of the fixing frame for automatically and accurately feeding the plastic masterbatch into the limiting shell.

[0009] In a preferred embodiment of the present invention, the feeding assembly specifically includes: a guide tube, a guide tube connected inside the inlet hole (the upper part of the inner side of the guide tube is conical), a fixing plate provided between the tops of the guide tubes, a feeding ring provided on the upper part of the inner side of the connecting ring, a conical channel opened on the top of the feeding ring directly above the limiting shell, the slope of the conical channel near the center of the feeding ring being greater than the slope of the side away from the center of the feeding ring, a limiting cover provided on the upper part of the inner side of the fixing frame, and a conical shell connected to the inner side of the feeding ring, the bottom of the conical shell being in contact with the top of the feeding ring at the same height.

[0010] In a preferred embodiment of the present invention, the invention further includes: a fixing ring, wherein each adjacent extrusion plate of the extrusion wheel is coaxially connected with a fixing ring, the fixing ring having a rubber ring on its outer side, and the rubber ring having a soft rubber ring on its outer side; the diameter of the fixing ring is less than half the diameter of the extrusion wheel; and the diameter of the rubber ring is equal to the diameter of the extrusion wheel.

[0011] In a preferred embodiment of the present invention, it further includes: a limiting ring, wherein the limiting ring is provided on the inner side of the fixed shell, the limiting ring is a circular ring with a wave-like undulation along the circumferential direction, a through hole is opened on one side of the conical channel, a top block is slidably provided in the through hole, a connecting rod is provided on one side of the top block, and the connecting rod is slidably sleeved with the limiting ring.

[0012] In a preferred embodiment of the present invention, it further includes: a fixing tube, wherein the fixing tube is provided through the fixing plate, a conical block is provided slidably inside the fixing tube, and an elastic element is connected between the fixing tube and the conical block.

[0013] In a preferred embodiment of the present invention, it further includes: a mounting base, wherein a top plate is rotatably mounted on the inner side wall of the limiting cover, and a torsion spring is connected between the mounting base and the top plate.

[0014] In a preferred embodiment of the present invention, it further includes: a feed sleeve, wherein the feed sleeve is placed on top of the feed ring, and the feed sleeve restricts only the outlet position of the conical channel.

[0015] In a preferred embodiment of the present invention, it further includes: a material hopper, wherein the outlet position at the bottom of the fixed shell is provided with a material hopper having an inclined bottom.

[0016] In a preferred embodiment of the present invention, the horizontal edges of the extrusion plates of the extrusion roller are uniformly provided with a plurality of small notches.

[0017] Compared with the prior art, the present invention has the following advantages: The present invention uses a limiting shell to drive the plastic masterbatch to move, so that the plastic masterbatch comes into contact with the extrusion roller and undergoes extrusion deformation. After the extrusion process is completed, the surface area of ​​the plastic masterbatch is increased, and a depression that is not easy to come into contact with the outside is generated, which facilitates the subsequent adhesion process. Furthermore, when different plastic masterbatches are extruded by the extrusion roller, the plastic masterbatches will move towards the inner wall of the limiting shell, and plastic masterbatches of different specifications will be extruded to different degrees, ensuring that plastic masterbatches of different specifications can form a suitable volume-to-surface area ratio for subsequent adhesion processing. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a partial three-dimensional cross-sectional view of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the gear, connecting ring, and toothed ring of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the extrusion wheel, rotating ring, and limiting shell of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the fixed shell and outlet of the present invention.

[0023] Figure 6 This is a partial three-dimensional structural diagram of the extrusion wheel, rotating ring, and limiting shell of the present invention.

[0024] Figure 7 This is a partial three-dimensional structural schematic diagram of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the conduit, fixing plate, and feed ring of the present invention.

[0026] Figure 9 This is a three-dimensional cross-sectional view of the catheter of the present invention.

[0027] Figure 10 This is a three-dimensional structural diagram of the extrusion wheel and soft rubber ring of the present invention.

[0028] Figure 11 This is a three-dimensional structural diagram of the fixing ring, rubber ring, and soft rubber ring of the present invention.

[0029] Figure 12 This is a three-dimensional structural diagram of the limiting ring, connecting rod, and top block of the present invention.

[0030] Figure 13 This is an enlarged view of point A in the present invention.

[0031] Figure 14 This is a three-dimensional structural diagram of the fixing plate, fixing tube, and conical block of the present invention.

[0032] Figure 15 This is an enlarged view of section B of the present invention.

[0033] Figure 16 This is a three-dimensional structural diagram of the mounting base, top plate, and torsion spring of the present invention.

[0034] Figure 17 This is a three-dimensional structural diagram of the feed sleeve of the present invention.

[0035] Figure 18 This is a structural diagram of biodegradable plastic masterbatch after processing.

[0036] The above-mentioned attached drawings include the following reference numerals: 1. Base, 2. Fixing frame, 3. Fixing shell, 301. Inlet hole, 302. Outlet, 4. Motor, 5. Rotating shaft, 6. Extrusion wheel, 7. Rotating ring, 8. Limiting shell, 9. Gear, 10. Connecting ring, 11. Gear ring, 12. Guide tube, 13. Fixing plate, 14. Feeding ring, 1401. Conical channel, 15. Limiting cover, 16. Conical shell, 17. Fixing ring, 18. Rubber ring, 19. Soft rubber ring, 20. Limiting ring, 21. Connecting rod, 22. Top block, 23. Through hole, 24. Fixing tube, 25. Conical block, 26. Elastic element, 27. Mounting seat, 28. Top plate, 29. Torsion spring, 30. Feeding sleeve, 31. Gathering hopper. Detailed Implementation

[0037] Although the present invention may be described with respect to a particular application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those of ordinary skill in the art will recognize that terms such as above, below, upward, downward, etc. are used to describe the drawings and do not represent a limitation on the scope of the present invention defined by the appended claims. Any numerical labels such as first or second are merely illustrative and are not intended to limit the scope of the present invention in any way.

[0038] Embodiment 1

[0039] As Figures 1 to 7 and Figure 18 shown, the present invention provides a degradable plastic masterbatch processing device, specifically including: a base 1, a fixing frame 2, a fixing shell 3, a motor 4, a rotating shaft 5, an extrusion wheel 6, a rotating ring 7, a limiting shell 8, a gear 9, a connecting ring 10, and a tooth ring 11;

[0040] Among them, a fixing frame 2 is provided at the top of the base 1, a fixing shell 3 is provided at the lower part inside the fixing frame 2, the vertical section of the fixing shell 3 is a "C" shape with an opening facing outwards, a plurality of inlet holes 301 are provided at the top of the fixing shell 3, an outlet 302 is opened at the bottom of the fixing shell 3, the horizontal positions of the inlet holes 301 and the outlet 302 are respectively located on the horizontal two sides of the fixing shell 3, and the plastic masterbatch enters the fixing shell 3 simultaneously from the plurality of inlet holes 301 at the top of the fixing shell 3 and leaves the fixing shell 3 from the outlet 302 after moving inside the fixing shell 3; [[ID=!4]]

[0041] Among them, a motor 4 is provided at the bottom of the fixing shell 3, a vertically oriented rotating shaft 5 is rotatably provided at the horizontal position between the inlet holes 301 and the outlet 302 on the fixing shell 3, the rotating shaft 5 penetrates through the upper and lower sides of the fixing shell 3, and a plurality of extrusion sheets stacked to form an extrusion wheel 6 are provided at the middle position inside the fixing shell 3 of the rotating shaft 5. When the plastic masterbatch moves inside the fixing shell 3 and passes through the extrusion wheel 6, the extrusion wheel 6 extrudes the plastic masterbatch to cause it to deform;

[0042] Among them, a rotating ring 7 is rotatably provided on the outer side inside the fixing shell 3, a plurality of semi-cylindrical limiting shells 8 are evenly spaced and provided on the inner side of the rotating ring 7, adjacent limiting shells 8 are in contact with each other, and the distance between the limiting shell 8 and the vertical side wall of the inner wall of the fixing shell 3 is equal to the radius of the semi-cylindrical limiting shell 8, ensuring that when the limiting shell 8 drives the plastic masterbatch to move, the plastic masterbatch will not脱离 from the limiting shell 8. A gear 9 is provided at the position where the top end of the rotating shaft 5 penetrates through the fixing shell 3, a connecting ring is connected to the outer side of the rotating ring 7, a tooth ring 11 is provided at the middle of the inner side of the connecting ring 10, and the tooth ring 11 meshes with the gear 9 for realizing the operation of the motor 4 to drive each part of the component;

[0043] Among them, a feeding component for automatically and accurately feeding the plastic masterbatch into the limiting shell 8 is provided at the top inside the fixing frame 2.

[0044] For example, in use, motor 4 is first started. Motor 4 drives extrusion wheel 6 to rotate via shaft 5, and drives connecting ring 10 to rotate via gear 9 and gear ring 11. Connecting ring 10 drives rotating ring 7 to rotate within fixed shell 3. At the same time, plastic masterbatch is fed into limiting shell 8 via feeding assembly. The semi-circular tubular limiting shell 8 drives columnar plastic masterbatch to rotate within fixed shell 3. Finally, the plastic masterbatch passes through extrusion wheel 6, which extrudes and deforms the plastic masterbatch, extruding the sides of the plastic masterbatch inward. After extrusion, the plastic masterbatch is then driven by rotating ring 7 and limiting shell 8 to move within fixed shell 3 to directly above outlet 302 of fixed shell 3. The plastic masterbatch then falls from outlet 302. Motor 4 continues to drive rotating ring 7 to rotate, and rotating ring 7 continues to drive plastic masterbatch through extrusion wheel 6 via limiting shell 8 to complete the extrusion. In this way, the plastic masterbatch is processed. After extrusion, the surface area of ​​the plastic masterbatch is increased, which facilitates subsequent adhesion processing.

[0045] Since the reagents in the subsequent adhesion treatment are directly adhered to the surface of the plastic masterbatch, but different specifications of plastic masterbatch have different volume-to-surface area ratios, in the above embodiment, when the plastic masterbatch of different specifications is squeezed by the extrusion roller 6, the plastic masterbatch will move towards the inner wall of the limiting shell 8 under the push of the extrusion roller 6. Since the distance between the extrusion roller 6 and the limiting shell 8 is fixed, and the diameters of different specifications of plastic masterbatch are different, ultimately, different specifications of plastic masterbatch will be squeezed to different degrees. When the plastic masterbatch comes into contact with the extrusion roller 6, it will be preferentially pushed towards the inner side of the limiting shell 8. During extrusion, the smaller the diameter, the less the indentation is squeezed out by the extrusion roller 6, and the larger the diameter of the plastic masterbatch, the greater the contact with the extrusion roller 6, and the larger the indentation squeezed out. At the same time, the longer the plastic masterbatch will also come into contact with more extrusion plates on the extrusion roller 6, ensuring that the plastic masterbatch can form a suitable volume-to-surface area ratio for the subsequent dispersion liquid adhesion treatment, ensuring that a sufficient amount of dispersion liquid can adhere to the plastic masterbatch, and ensuring that the plastic masterbatch can carry the dispersion liquid of the appropriate amount for its final melt molding step. At the same time, referring to Figure 18 The plastic masterbatch structure shown allows the dispersion to adhere to the concave areas, preventing the adhered dispersion from being scraped off due to collisions with the plastic masterbatch.

[0046] For example, in this embodiment, the extrusion structure formed by the inlet 301, outlet 302, extrusion roller 6, rotating shaft 5 and gear 9 can be arranged in multiple sets in a centrally symmetrical manner within the fixed shell 3. All gears 9 mesh with the gear ring 11. During operation, the motor drives the gear ring 11 and connecting ring 10 to rotate through one of the rotating shafts 5 and gears 9. Finally, each gear 9 drives all extrusion rollers to rotate in the same direction, thereby realizing the simultaneous extrusion deformation operation on multiple plastic masterbatches to improve production efficiency.

[0047] like Figures 7 to 9As shown, the feeding assembly specifically includes a guide tube 12, a fixing plate 13, a feeding ring 14, a limiting cover 15, and a conical shell 16;

[0048] The fixed housing 3 has a guide tube 12 connected to the inlet hole 301 at the top. The upper inner part of the guide tube 12 is tapered. A fixed plate 13 is provided between the tops of the guide tubes 12. A feed ring 14 is provided on the upper inner part of the connecting ring 10. The feed ring 14 slides in contact with the fixed plate 13. A tapered channel 1401 is opened on the top of the feed ring 14 directly above the limiting housing 8. The slope of the tapered channel 1401 on the side closer to the center of the feed ring 14 is greater than the slope on the side farther from the center of the feed ring 14. A limiting cover 15 is provided on the upper inner part of the fixed frame 2. The limiting cover 15 slides in contact with the feed ring 14. A tapered housing 16 is connected to the inner side of the feed ring 14. The bottom of the tapered housing 16 contacts the top of the feed ring 14 at the same height.

[0049] When adding plastic masterbatch, it is fed directly from the inlet at the top of the limiting cover 15 into the conical shell 16 and the upper part of the feed ring 14. The conical structure of the conical shell 16 ensures that all the plastic masterbatch eventually falls onto the top of the feed ring 14. The plastic masterbatch is positioned and enters the guide tube 12 through the conical channel 1401, and then falls into the limiting shell 8 through the guide tube 12. The feed ring 14 rotates with the rotating ring 7 through the connecting ring 10, so that all the plastic masterbatch enters the guide tube 12. When the channel 1401 is not connected to the guide tube 12, it can be blocked and limited by the fixing plate 13. At the same time, the upper inner part of the guide tube 12 is conical. When the feed ring 14 rotates, it can force the plastic masterbatch that is held between the guide tube 12 and the conical channel 1401 back into the conical channel 1401, so as to avoid affecting the rotation of the feed ring 14. The conical channel 1401 is an asymmetrical cone, and its slope is greater on the side closer to the center of the rotating ring 7. This can better position the plastic masterbatch into the guide tube 12.

[0050] Example 2

[0051] like Figure 10 and Figure 11 As shown, based on Embodiment 1, it further includes a fixing ring 17, a rubber ring 18, and a soft rubber ring 19. The adjacent extrusion plates of the extrusion wheel 6 are coaxially connected with fixing rings 17. The diameter of the fixing ring 17 is less than half the diameter of the extrusion wheel 6. A rubber ring 18 is provided on the outside of the fixing ring 17, and a soft rubber ring 19 is provided on the outside of the rubber ring 18. The diameter of the rubber ring 18 is equal to the diameter of the extrusion wheel 6.

[0052] The soft rubber ring 19 between adjacent extrusion plates of the extrusion roller 6 can limit the extrusion of the plastic masterbatch during extrusion. The soft rubber ring 19 and the rubber ring 18 undergo a certain degree of horizontal concave deformation. The soft rubber ring 19 is more prone to deformation than the rubber ring 18. When the extrusion roller 6 contacts the plastic masterbatch, the soft rubber ring 19 deforms and adheres tightly to the plastic masterbatch. The rubber ring 18 provides pressure to the soft rubber ring 19 to squeeze the plastic masterbatch, ensuring that the plastic masterbatch can accurately contact the extrusion roller 6 and avoid abnormal displacement of the plastic masterbatch after contacting the extrusion roller 6, which would affect the extrusion effect. In this embodiment, the radius of the rubber ring 18 set on the outer ring of the fixing ring 17 is at least half the radius of the extrusion roller 6. With such specifications, when using some rubber materials with small elastic deformation, the rubber ring 18 can generate sufficient deformation when extruding the plastic masterbatch and ensure stable extrusion of the plastic masterbatch, avoiding excessive extrusion that would deform the plastic masterbatch, or too loose an extrusion that would not be able to stably squeeze the plastic masterbatch.

[0053] like Figure 2 , Figure 12 and Figure 13 As shown, based on Embodiment 1, it also includes a limiting ring 20, a top block 22, and a connecting rod 21. The limiting ring 20 is provided on the inner side of the fixed shell 3. The limiting ring 20 is a circular ring with a wave-like undulation along the circumferential direction. The tapered channel 1401 of the feed ring 14 has a through hole 23 on the side near the center of the feed ring 14. The top block 22 is slidably provided in the through hole 23. The side of the top block 22 near the center of the feed ring 14 is connected to the connecting rod 21. The end of the connecting rod 21 away from the top block 22 is slidably sleeved with the limiting ring 20.

[0054] When the feed ring 14 rotates, it can drive the top block 22 to rotate relative to the limiting ring 20. The top block 22 is connected to the limiting ring 20 through the connecting rod 21. The connecting rod 21 can control the top block 22 to reciprocate within the conical channel under the action of the wave-like structure of the limiting ring 20 in the circumferential direction. When the plastic masterbatch enters the conical channel 1401, the reciprocating top block 22 can continuously adjust the position of the plastic masterbatch in contact with it to ensure that the plastic masterbatch can accurately enter the guide tube 12.

[0055] like Figure 14 and Figure 15 As shown, based on embodiment 1, it also includes a fixed tube 24, a conical block 25 and an elastic element 26. The fixed tube 24 is provided through the position between two adjacent guide tubes 12 on the fixed plate 13. The top of the fixed tube 24 is flush with the top of the fixed plate 13. The conical block 25 is slidably provided inside the fixed tube 24. The conical block 25 slides and contacts the feed ring 14. The elastic element 26 connects the fixed tube 24 and the conical block 25.

[0056] The conical block 25 inside the fixed tube 24 is always in contact with the bottom of the feed ring 14. In the initial state, the conical block 25 is squeezed into the fixed tube 24 by the feed ring 14, and the elastic element 26 is compressed. When the feed ring 14 rotates so that the conical channel 1401 is directly opposite the fixed tube 24, the conical block 25 extends into the conical channel 1401 under the action of the elastic element 26. The conical block 25 pushes the plastic masterbatch in the conical channel 1401 to adjust the position of the plastic masterbatch and ensure that the plastic masterbatch can accurately enter the guide tube 12.

[0057] like Figure 2 and Figure 16 As shown, it also includes a mounting base 27, a top plate 28, and a torsion spring 29. The inner wall of the limiting cover 15 is provided with a vertically oriented mounting base 27. The top plate 28 is rotatably mounted on the mounting base 27. The bottom of the top plate 28 is higher than the top of the feed ring 14. A torsion spring 29 is connected between the mounting base 27 and the top plate 28.

[0058] The top plate 28 on the mounting base 27 can block the plastic masterbatch at the top of the feeding ring 14 when the feeding ring 14 rotates, ensuring that the plastic masterbatch can enter the conical channel 1401. At the same time, the top plate 28 is rotatably connected to the mounting base 27, and the torsion spring 29 provides rotational resistance to prevent the top plate 28 from being squeezed and damaged by the plastic masterbatch stuck on the feeding ring 14.

[0059] like Figure 17 As shown, it also includes a feed sleeve 30, which is placed on top of the feed ring 14. The feed sleeve 30 only restricts the outlet position of the conical channel 1401.

[0060] The feed sleeve 30 at the top of the feed ring 14 ensures that the plastic masterbatch can enter the limiting shell 8 vertically when the particle size is too small, and ensures that it will not affect the normal extrusion of the plastic masterbatch by the top block 22.

[0061] like Figure 1 and Figure 2 As shown, it also includes a material hopper 31, and the bottom of the fixed shell 3 is provided with a material hopper 31 with a sloping bottom at the outlet 302 position.

[0062] The material hopper 31 can collect and discharge the plastic masterbatch that has been extruded and discharged from the fixed shell 3.

[0063] like Figure 6 and Figure 10 As shown, the horizontal edges of the extrusion plates of the extrusion roller 6 are uniformly covered with multiple small notches.

[0064] The small notches on the horizontal edge of the extrusion plate of the extrusion roller 6 can prevent the plastic masterbatch from rotating relative to the extrusion roller 6 and causing excessive extrusion of the plastic masterbatch when it rotates to extrude the plastic masterbatch. Furthermore, the small notches can also play a certain limiting role when the extrusion roller 6 contacts the plastic masterbatch.

[0065] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A biodegradable plastic masterbatch processing device, characterized in that, Comprising: A base (1) and a fixing frame (2), with the fixing frame (2) provided at the top of the base (1). Inside the fixing frame (2), there is a fixing shell (3). The vertical cross-section of the fixing shell (3) is a "C" shape with the opening facing outwards. At the top of the fixing shell (3), there is an inlet hole (301). At the bottom of the fixing shell (3), there is an outlet (302). At the bottom of the fixing shell (3), there is a motor (4). A rotating shaft (5) is rotatably provided on the fixing shell (3). The rotating shaft (5) is connected to the output shaft of the motor (4). In the middle of the rotating shaft (5), there is an extrusion wheel (6). The extrusion wheel is composed of multiple stacked extrusion sheets. Inside the fixing shell (3) and on the outer side, there is a rotating ring (7). On the inner side of the rotating ring (7), there are multiple semi-cylindrical limiting shells (8) evenly spaced. Adjacent limiting shells (8) are in contact with each other. The distance between the limiting shell (8) and the vertical side wall of the inner wall of the fixing shell (3) is equal to the radius of the semi-cylindrical limiting shell (8). The semi-cylindrical limiting shell (8) drives the columnar plastic masterbatch to rotate inside the fixing shell (3), and finally the plastic masterbatch passes through the extrusion wheel (6), and the extrusion wheel (6) extrudes and deforms the plastic masterbatch. At the top of the rotating shaft (5), there is a gear (9). On the outer side of the rotating ring (7), there is a connecting ring (10). Inside the connecting ring (10), there is a toothed ring (11). The toothed ring (11) meshes with the gear (9); At the inner top of the fixing frame (2), there is a feeding component for automatically and precisely feeding the plastic masterbatch into the limiting shell (8).

2. The biodegradable plastic masterbatch processing device according to claim 1, characterized in that, The feeding component specifically includes: A conduit (12). The conduit (12) is connected inside the inlet hole (301). The upper part inside the conduit (12) is conical. Between the tops of the conduits (12), there is a fixing plate (13). Inside the upper part of the connecting ring (10), there is a feeding ring (14). At the top of the feeding ring (14) and at the position directly above the limiting shell (8), there are conical channels (1401). The slope of the conical channel (1401) on the side closer to the center of the feeding ring (14) is greater than the slope on the side farther from the center of the feeding ring (14). At the inner upper part of the fixing frame (2), there is a limiting cover (15). Inside the feeding ring (14), there is a conical shell (16). The bottom of the conical shell (16) is in contact and配合 with the top of the feeding ring (14) at the same height. The feeding ring (14) rotates with the rotating ring (7) through the connecting ring (10).

3. A biodegradable plastic masterbatch processing device according to claim 2, characterized in that it further... Comprising: A fixing ring (17). Between adjacent extrusion sheets of the extrusion wheel (6), there is a fixing ring (17) connected coaxially. On the outer side of the fixing ring (17), there is a rubber ring (18). On the outer side of the rubber ring (18), there is a soft rubber ring (19); The diameter of the rubber ring (18) is equal to the diameter of the extrusion wheel (6).

4. A biodegradable plastic masterbatch processing device according to claim 3, characterized in that it further... Comprising: A limiting ring (20) is provided on the inner side of the fixed shell (3). The limiting ring (20) is a circular ring with a wave-like undulation along the circumference. A through hole (23) is opened on one side of the conical channel (1401). A top block (22) is slidably provided in the through hole (23). A connecting rod (21) is provided on one side of the top block (22). The connecting rod (21) is slidably sleeved with the limiting ring (20).

5. A biodegradable plastic masterbatch processing device according to claim 4, characterized in that it further... include: A fixed tube (24) is provided through the position between two adjacent guide tubes (12) on the fixed plate (13). The top of the fixed tube (24) is flush with the top of the fixed plate (13). A conical block (25) is provided slidingly inside the fixed tube (24). An elastic element (26) is connected between the fixed tube (24) and the conical block (25).

6. A biodegradable plastic masterbatch processing device according to claim 5, characterized in that it further... include: Mounting seat (27), the inner wall of the limiting cover (15) is provided with mounting seat (27), the mounting seat (27) is rotatably provided with top plate (28), and a torsion spring (29) is connected between the mounting seat (27) and the top plate (28).

7. A biodegradable plastic masterbatch processing device according to claim 6, characterized in that it further... include: Feed sleeve (30), the top of the feed ring (14) is covered with a feed sleeve (30), the feed sleeve (30) only restricts the position of the outlet of the conical channel (1401).

8. A biodegradable plastic masterbatch processing device according to claim 7, characterized in that it further... include: The bottom of the fixed shell (3) is provided with a material hopper (31) at the outlet (302) position. The bottom of the fixed shell (3) is provided with a material hopper (31) with an inclined bottom.

9. A biodegradable plastic masterbatch processing device according to claim 8, characterized in that, The extrusion plates of the extrusion roller (6) have multiple small notches evenly distributed on their horizontal edges.

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