Additive feeding mechanism for preparing degradable plastics

Abstract

The invention discloses an additive feeding mechanism for preparing degradable plastics, and relates to the technical field of degradable feed additive feeding. A feeding hopper is arranged above a device body, and a middle partition is arranged in the middle of the feeding hopper, a driving member is arranged at the center of the middle partition, a storage bin is arranged on the outer circumferential surface of the device body, and a dividing block is arranged in the device body, the dividing block is provided with feeding ports on both sides of the middle partition, a dividing cavity is arranged in the middle of the dividing block on one side of the middle partition, and the dividing cavity is connected with the storage bin, and the storage bin is divided into two cavities for storing additives by the partition, a rotating shaft is coaxially arranged below the driving member, and a rotating member is rotatably arranged on the rotating shaft. The mechanism solves the problems of blockage and adhesion inside the feeding device when the additive is fed, and the problem of uneven feeding of additives with poor fluidity, which makes the additive content in the base material insufficient and affects the overall quality of the product.

Description

Technical Field

[0001] The invention relates to the technical field of feeding additives for degradable plastics, and more particularly to an additive feeding mechanism for preparing degradable plastics. Background Art

[0002] Degradable plastics refer to plastics that can be decomposed into water, carbon dioxide and biomass by microorganisms under specific conditions. Their main purpose is to reduce environmental pollution and plastic waste. In the preparation process of degradable plastics, additives need to be added to the raw materials to improve the high flexibility and processability of the degradable plastics and reduce the brittleness of the degradable plastics. At the same time, in order to ensure that the degradable plastics can be more smoothly molded, adding additives to the raw materials can improve the fluidity of the melt and facilitate its molding process. Therefore, in the preparation process of degradable plastics, the additive feeding mechanism is crucial.

[0003] In the prior art, the additives are mainly fed by screw conveyors and gravity feeding methods. First, the required additives are prepared according to the formula, and then the additives are fed by a screw conveyor or a gravity feeding system according to the set ratio. The feeding amount of the additives is monitored and adjusted in real time by the weighing system inside the equipment to ensure the accuracy of the additive addition. Finally, the additives are fully mixed with the base material to ensure that the additives are evenly distributed inside the base material. However, when feeding powder or granular additives with poor fluidity by screw conveyors and gravity feeding methods, blockage is prone to occur. At the same time, additives with poor fluidity will cause uneven feeding, which will cause the additives to remain inside the feeding device, and then make the additives uneven inside the base material, affecting the overall quality of the product. In order to avoid the uneven feeding of additives, the prior art uses an automated control method to feed additives, reduce the error caused by human factors in the feeding of additives, and use sensors to detect the feeding process and adjust the feeding speed and the amount of additives in time. However, although this method can improve the accuracy of feeding, it also greatly increases the cost of use.

[0004] In view of the above situation, the present invention designs an additive feeding mechanism for preparing degradable plastics, which solves the above technical problems. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an additive feeding mechanism for the preparation of degradable plastics, which solves the problems of blockage and adhesion of additives inside the feeding device during feeding, and also solves the problem that additives with poor fluidity become uneven during the feeding process, resulting in insufficient content of additives inside the base material, affecting the overall quality of the product.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An additive feeding mechanism for preparing degradable plastics, used for quantitative feeding of additives for preparing degradable plastics, comprises an equipment body, a feed hopper is arranged above the equipment body, and a middle partition is arranged in the middle of the feed hopper, the middle partition is used to separate various additives, a driving member is arranged at the center of the middle partition, a storage bin is arranged on the outer circumferential surface of the equipment body, a discharge box is connected below the equipment body, a base for fixing the whole device is arranged at the bottom end of the discharge box, the interior of the equipment body is a hollow structure, and a partition block is arranged in the equipment body, The dividing block is provided with feeding ports for feeding materials on both sides of the middle partition, and a material distribution cavity is provided in the middle of the dividing block on one side of the middle partition, and the material distribution cavity is communicated with the storage bin, and the storage bin is divided into two cavities for storing additives by the partition; a rotating shaft is coaxially arranged below the driving member, a rotating member is rotatably arranged on the rotating shaft, and the rotating member is arranged in the material distribution cavity, a guide assembly is arranged above the rotating member, and the guide assembly is in contact with the rotating member, the driving member drives the rotating shaft to rotate forward and reverse periodically, and the rotating shaft drives the rotating member to fit the guide assembly for periodic movement.

[0008] Preferably, the driving member comprises a driving motor, which is vertically arranged above the middle partition, and an output end of the driving motor is vertically connected to a rotating shaft downward.

[0009] Preferably, the rotating part includes a rotating ring and a material dividing plate, the rotating ring is coaxially arranged with the rotating shaft, and a fixed shaft is arranged on one side of the rotating ring, one side of the rotating ring is connected to the material dividing plate, a rotating hole is arranged at the contact position between the material dividing plate and the rotating ring, and the fixed shaft is rotatably arranged in the rotating hole.

[0010] Preferably, the feed inlets opened on both sides of the middle partition are of fan-shaped structure, and the dividing plate is of the same fan-shaped structure, and the dividing plate is arranged to overlap with the feed inlets opened on both sides of the middle partition.

[0011] Preferably, the guide assembly includes a fixed block, a control plate, a connecting plate, an extension plate, a connecting spring and a cleaning block, the fixed block is coaxially arranged with the rotating shaft, and the fixed block sleeve is arranged on the circumferential surface of the rotating shaft, the fixed block is in a "convex" shape, and a control cavity is opened inside the fixed block, a control plate is arranged in the middle of the control cavity, connecting plates are symmetrically installed on both sides of the control plate, an extension plate is arranged on the side of the connecting plate away from the control plate, the extension plate is connected to the top of the control cavity through a connecting spring, and the other end of the extension plate is connected to the cleaning block through a connecting spring.

[0012] Preferably, the control plate and the connecting plate have triangular structures at both ends. In an initial state, the control plate fits the connecting plate, and the contact portion between the extending plate and the connecting plate has the same triangular structure.

[0013] Preferably, the mixing mechanism includes auger blades and fixed springs, the auger blades are on the circumferential surface of the rotating shaft, and two groups of auger blades are arranged, the edge thickness of the auger blades is smaller than the middle thickness of the auger blades, and the auger blades are respectively connected to the partition block and the fixed frame through the fixed springs.

[0014] Preferably, a gyration groove is provided on the circumferential surface of the rotating shaft, and the gyration groove is located in the middle of the two groups of auger blades. A sleeve is coaxially arranged on the rotating shaft, and a limit block provided in the sleeve is arranged in the gyration groove.

[0015] Preferably, the length of the gyration groove depends on the limit compression length of the fixed springs arranged above and below the auger blades.

[0016] Beneficial effects of the present invention:

[0017] 1. The present invention provides an additive feeding mechanism for the preparation of degradable plastics. The mechanism drives the rotating shaft to move synchronously through a driving member, and the rotating shaft drives the rotating member to fit the guide component to perform periodic movement. At this time, since the rotating member fits the guide component, when the rotating member fits the guide component to complete the movement, the guide component can clean up the additives remaining on the surface of the rotating member, and at the same time, the cleaning additives can be guided into a storage bin in cooperation with the guide component, thereby avoiding mixing between different additives. At the same time, by guiding the additives into the storage bin, waste of additives can be avoided, thereby reducing the cost of preparing degradable plastics.

[0018] 2. The present invention provides an additive feeding mechanism for the preparation of biodegradable plastics. The mechanism drives the dividing plate to seal the feed ports opened on both sides of the middle partition through the forward and reverse periodic rotation of the rotating shaft, and then drives the motor to rotate forward and reverse so that only one feed port on both sides of the middle partition can pass the additive, thereby realizing the quantitative input of the additive and avoiding the uneven distribution of the additive in the base material.

[0019] 3. The present invention provides an additive feeding mechanism for the preparation of biodegradable plastics. The mechanism rotates through a rotating shaft, and the swivel groove on the rotating shaft pushes the sleeve to reciprocate up and down. At this time, the movement of the sleeve drives the auger blades on the upper and lower sides to move up and down. Through the rotation of the auger blades, the additives in the auger blades can be initially mixed. The reciprocating motion of the sleeve causes the auger blades to squeeze the fixed spring, thereby preventing the additive from flowing in the auger blades and adhering to its surface, resulting in insufficient additive content inside the base material, thereby reducing the overall quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0022] Figure 3 A partial cross-sectional view of the guide assembly of the present invention cooperating with the rotating member;

[0023] Figure 4 A cross-sectional view of the guide assembly of the present invention cooperating with the rotating member;

[0024] Figure 5 It is a partial view of the overall structure of the mixing mechanism of the present invention;

[0025] Figure 6 An exploded view of the guide assembly of the present invention cooperating with the rotating member;

[0026] Figure 7 It is a cross-sectional view of the guide assembly of the present invention.

[0027] Reference numerals:

[0028] 1. Equipment body; 11. Feed hopper; 111. Middle partition; 112. Drive motor; 12. Storage bin; 13. Discharge box; 14. Base; 15. Separator; 151. Distribution chamber; 16. Fixed frame; 2. Rotating shaft; 21. Convolution groove; 3. Rotating member; 31. Rotating ring; 311. Fixed shaft; 32. Distribution plate; 321. Rotating hole; 4. Guide assembly; 41. Fixed block; 411. Control chamber; 42. Control board; 421. Triangular structure; 43. Connecting plate; 44. Extending plate; 45. Connecting spring; 46. Cleaning block; 5. Mixing mechanism; 51. Auger blade; 52. Sleeve; 521. Limit block; 53. Fixed spring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] refer to Figure 1 , Figure 2 , Figure 3, an additive feeding mechanism for the preparation of degradable plastics, used for quantitative feeding of additives for the preparation of degradable plastics, comprising an equipment body 1, a feed hopper 11 is arranged above the equipment body 1, and a middle partition 111 is arranged in the middle of the feed hopper 11, the middle partition 111 is used to separate various additives, a driving member is arranged at the center of the middle partition 111, a storage bin 12 is arranged on the outer circumferential surface of the equipment body 1, a discharge box 13 is connected below the equipment body 1, a base 14 for fixing the entire device is arranged at the bottom of the discharge box 13, the interior of the equipment body 1 is a hollow structure, and a partition block 15 is arranged in the equipment body 1, the partition Block 15 is provided with feeding ports for feeding on both sides of the middle partition 111, and a dividing cavity 151 is provided in the middle of the dividing block 15 on one side of the middle partition 111, and the dividing cavity 151 is communicated with the storage bin 12, and the storage bin 12 is divided into two cavities for storing additives by the partition; a rotating shaft 2 is coaxially arranged below the driving member, a rotating member 3 is rotatably arranged on the rotating shaft 2, and the rotating member 3 is arranged in the dividing cavity 151, a guide component 4 is arranged above the rotating member 3, and the guide component 4 is in contact with the rotating member 3, the driving member drives the rotating shaft 2 to rotate forward and reverse periodically, and the rotating shaft 2 drives the rotating member 3 to fit the guide component 4 for periodic movement.

[0031] During the working process, the operator first determines the additives to be added, and adds the additives into the feed hopper 11. The middle partition 111 set at the center of the hopper separates the additives to be added. The feed hopper 11 is set into a conical structure to facilitate the downward flow of the additives. Since a mixing mechanism 5 is set below the partition block 15, when the additives enter the equipment from the feed hopper 11, the additives will be blocked by the mixing mechanism 5 and thus accumulated inside the equipment. At this time, the driving member is started, and the driving member drives the rotating shaft 2 to rotate. The rotation of the rotating shaft 2 drives the rotating member 3 to reciprocate. In the initial state, the rotating member 3 is in the material distribution cavity 151. In the intermediate position, the rotating shaft 2 drives the rotating member 3 to reciprocate, and the rotating member 3 moves to the feed port on one side. Since the rotating shaft 2 can drive the mixing mechanism 5 to rotate when it rotates, the feed port on one side stops the addition of additives. Since the feed hopper 11 on the other side is not sealed by the rotating member 3, the additives enter the mixing mechanism 5 from the feed port. When the rotating member 3 moves to the feed port on the other side and seals the feed port on the other side, the feed port on one side is not sealed by the rotating member 3, and the additives enter the mixing mechanism 5 from the feed port. When the rotating member 3 moves to the end of the feed port on one side, the driving shaft drives the rotating member 3 to move to the feed port on the other side and seals it.

[0032] Through such reciprocating motion, quantitative delivery of additives can be achieved, thereby ensuring that the additives entering the mixing mechanism 5 are in a uniform proportion. At the same time, when the rotating part 3 reciprocates, it can fit the guide component 4. The guide component 4 can clean the additives remaining on the surface of the rotating part 3 to avoid the additives from adhering to the rotating part 3, thereby avoiding excessive adhesion of additives during long-term work, which affects the overall feeding efficiency. At the same time, the guide component 4 can clean and collect the same additives to ensure that the additives will not be wasted, thereby reducing the use cost of the entire mechanism.

[0033] The driving member includes a driving motor 112, and the driving motor 112 is vertically arranged above the middle partition 111, and the output end of the driving motor 112 is vertically connected to the rotating shaft 2 downward. Such an arrangement can ensure the stability of the operation of the entire device. At the same time, the driving motor 112 directly drives the driving shaft to rotate, which can reduce the energy loss in the transmission system and improve the overall efficiency. The driving motor 112 is directly connected to the rotating shaft 2, which can achieve faster starting and stopping and improve the responsiveness of the system, so that the rotating shaft 2 drives the rotating member 3 to rotate and can respond faster, thereby avoiding the phenomenon that the rotating member 3 does not rotate and cannot effectively seal the feed port.

[0034] refer to Figure 4 , Figure 5 , Figure 6 The rotating member 3 includes a rotating ring 31 and a material dividing plate 32. The rotating ring 31 is coaxially arranged with the rotating shaft 2, and a fixed shaft 311 is arranged on one side of the rotating ring 31. The material dividing plate 32 is connected to one side of the rotating ring 31. A rotating hole 321 is arranged at the contact position between the material dividing plate 32 and the rotating ring 31. The fixed shaft 311 is rotatably arranged in the rotating hole 321. Through such an arrangement, when the rotating ring 31 moves synchronously with the rotating shaft 2, the rotating ring 31 drives the material dividing plate 32 to rotate. When the material dividing plate 32 contacts the guide assembly 4, The rotating hole 321 on the dividing plate 32 will be offset along the direction of the fixed axis 311. At this time, the residual additive on the dividing plate 32 will fall into the dividing cavity 151 along the surface of the dividing plate 32. Through the inclined surface opened in the dividing cavity 151, the additive flows along the inclined surface to the storage bin 12 for collection. After the dividing plate 32 passes through the guide assembly 4, the dividing plate 32 is fitted with the partition block 15 on the side of the feed port, and the rotating hole 321 on the dividing plate 32 rotates around the fixed axis 311. At this time, the dividing plate 32 coincides with the rotating ring 31.

[0035] The feed ports opened on both sides of the middle partition 111 are of fan-shaped structure, and the dividing plate 32 is of the same fan-shaped structure. The dividing plate 32 is arranged to overlap with the feed ports opened on both sides of the middle partition 111. The feed ports with fan-shaped structure cooperate with the dividing plate 32 with fan-shaped structure to ensure that the additives are evenly distributed when flowing in, while avoiding blockage caused by aggregation. By changing the fan-shaped size of the feed ports on both sides, the dividing plate 32 can achieve different feed amounts of additives after one rotation, thereby realizing quantitative control of the additives.

[0036] refer to Figure 7 The guide assembly 4 includes a fixed block 41, a control plate 42, a connecting plate 43, a protruding plate 44, a connecting spring 45 and a cleaning block 46. The fixed block 41 is coaxially arranged with the rotating shaft 2, and the fixed block 41 is arranged on the circumferential surface of the rotating shaft 2. The fixed block 41 is in a "convex" shape, and a control cavity 411 is opened inside the fixed block 41. The control plate 42 is arranged in the middle of the control cavity 411. The connecting plates 43 are symmetrically installed on both sides of the control plate 42. The connecting plate 43 is provided with a protruding plate 44 on the side away from the control plate 42. The protruding plate 44 is connected to the top of the control cavity 411 through the connecting spring 45, and the other end of the protruding plate 44 is connected to the cleaning block 46 through the connecting spring 45. The two ends of the control plate 42 and the connecting plate 43 are triangular structures 421. In the initial state, the control plate 42 fits the connecting plate 43, and the contact part of the protruding plate 44 and the connecting plate 43 is the same triangular structure 421.

[0037] During operation, when the dividing plate 32 contacts the control plate 42, the dividing plate 32 squeezes the control plate 42 to move upward. At this time, the control plate 42 pushes the connecting plates 43 on both sides to move to both sides. When the connecting plates 43 move to both sides, they push the extending plate 44 to move downward. At this time, the extending plate 44 drives the cleaning block 46 to move toward the dividing plate 32 through the connecting spring 45. When the dividing plate 32 completely passes through the control plate 42, the cleaning block 46 can prevent additive residue from appearing on the surface of the dividing plate 32. After the dividing plate 32 is completely moved, the extending plate 44 is pulled to reset by the connecting springs 45 connected to the top of the control chamber 411 on both sides. When the extending plate 44 moves upward, the triangular structure 421 opened at the contact position between the extending plate 44 and the connecting plate 43 squeezes the connecting plates 43 on both sides to move toward the middle to complete the reset. When the dividing plate 32 completes the movement, the control plate 42 moves downward due to its own gravity to complete the reset.

[0038] The mixing mechanism 5 includes an auger blade 51 and a fixed spring 53. The auger blade 51 is on the circumferential surface of the rotating shaft 2, and two groups of auger blades 51 are arranged. The edge thickness of the auger blade 51 is smaller than the middle thickness of the auger blade 51. The auger blade 51 is connected to the partition block 15 and the fixed frame 16 through the fixed spring 53 respectively. Through such an arrangement, when the auger blade 51 rotates, the additives entering the auger blade 51 can move downward along the edge of the auger blade 51, and the additives at the feed ports on both sides can be preliminarily mixed under the rotation of the auger blade 51. When the mixed additives enter the degradable plastic preparation equipment, they only need to be mixed with the raw materials, so there is no need to consider the problem of uneven mixing of various additives in the raw materials.

[0039] The circumferential surface of the rotating shaft 2 is provided with a gyration groove 21, and the gyration groove 21 is located in the middle of the two groups of auger blades 51. The rotating shaft 2 is coaxially provided with a sleeve 52, and the limit block 521 provided in the sleeve 52 is provided in the gyration groove 21. Through such a setting, when the sleeve 52 is fixedly connected to the lower auger blade 51, when the rotating shaft 2 rotates and drives the sleeve 52 to move in the gyration groove 21, when the sleeve 52 moves upward, the sleeve 52 will squeeze the upper auger blade 51, and the auger blade 51 will squeeze The fixed spring 53 is pressed upward, and when the sleeve 52 no longer squeezes, the auger blade 51 moves downward due to the elastic force of the fixed spring 53. At this time, the additive adhering to the auger blade 51 will loosen, and thus flow downward along the edge of the auger blade 51 through the rotation of the auger blade 51. When the sleeve 52 drives the lower auger blade 51 to reciprocate and squeeze the fixed spring 53, the sleeve 52 can move up and down to push the auger blade 51 to clean the additive that has adhered to it, thereby ensuring that there is no blockage inside it.

[0040] The length of the swirl groove 21 depends on the maximum compression length of the fixed spring 53 set above and below the auger blade 51. Through such a setting, when the sleeve 52 moves up and down, the sleeve 52 pushes the auger blade 51 upward and the sleeve 52 drives the auger blade 51 to move downward without getting stuck, thereby ensuring the smoothness of the overall movement of the mechanism.

[0041] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. An additive feeding mechanism for preparing degradable plastics, used for quantitatively feeding additives for preparing degradable plastics, comprising a device body (1), a feed hopper (11) is arranged above the device body (1), and a middle partition (111) is arranged in the middle of the feed hopper (11), the middle partition (111) is used to separate various additives, and a driving member is arranged at the center of the middle partition (111), characterized in that: A material storage bin (12) is provided on the outer circumferential surface of the equipment body (1), a material discharge box (13) is connected below the equipment body (1), and a base (14) for fixing the entire device is provided at the bottom end of the material discharge box (13); The interior of the equipment body (1) is a hollow structure, and a partition block (15) is arranged in the equipment body (1), the partition block (15) is provided with feeding ports for feeding materials on both sides of the middle partition plate (111), a material dividing cavity (151) is provided in the middle of the partition block (15) on one side of the middle partition plate (111), and the material dividing cavity (151) is connected to the material storage bin (12), and the material storage bin (12) is divided into two cavities for storing additives by the partition plate; A rotating shaft (2) is coaxially arranged below the driving member, a rotating member (3) is rotatably arranged on the rotating shaft (2), and the rotating member (3) is arranged in the material distribution chamber (151), a guide component (4) is arranged above the rotating member (3), and the guide component (4) is in contact with the rotating member (3), the driving member drives the rotating shaft (2) to rotate forward and reverse periodically, and the rotating shaft (2) drives the rotating member (3) to move periodically in contact with the guide component (4); A mixing mechanism (5), the mixing mechanism (5) comprising auger blades (51) and fixing springs (53), the auger blades (51) being on the circumferential surface of the rotating shaft (2), and the auger blades (51) being provided in two groups, the edge thickness of the auger blades (51) being smaller than the middle thickness of the auger blades (51), and the auger blades (51) being connected to the partition block (15) and the fixing frame (16) respectively via the fixing springs (53); A gyration groove (21) is provided on the circumferential surface of the rotating shaft (2), and the gyration groove (21) is located in the middle of the two groups of auger blades (51). A sleeve (52) is coaxially arranged on the rotating shaft (2), and a limit block (521) provided in the sleeve (52) is arranged in the gyration groove (21).

2. The additive feeding mechanism for preparing biodegradable plastics according to claim 1, characterized in that: The driving member comprises a driving motor (112), the driving motor (112) being vertically arranged above the middle partition (111), and the output end of the driving motor (112) being vertically connected downward to a rotating shaft (2).

3. The additive feeding mechanism for preparing biodegradable plastics according to claim 2, characterized in that: The rotating member (3) comprises a rotating ring (31) and a material dividing plate (32); the rotating ring (31) is coaxially arranged with the rotating shaft (2); a fixed shaft (311) is arranged on one side of the rotating ring (31); one side of the rotating ring (31) is connected to the material dividing plate (32); a rotating hole (321) is arranged at a contact position between the material dividing plate (32) and the rotating ring (31); and the fixed shaft (311) is rotatably arranged in the rotating hole (321).

4. The additive feeding mechanism for preparing biodegradable plastics according to claim 3, characterized in that: The feed openings opened on both sides of the middle partition (111) are of a fan-shaped structure, and the material dividing plate (32) is of the same fan-shaped structure, and the material dividing plate (32) and the feed openings opened on both sides of the middle partition (111) are arranged to overlap.

5. The additive feeding mechanism for preparing biodegradable plastics according to claim 4, characterized in that: The guide assembly (4) comprises a fixed block (41), a control plate (42), a connecting plate (43), a protruding plate (44), a connecting spring (45) and a cleaning block (46); the fixed block (41) is coaxially arranged with the rotating shaft (2), and the fixed block (41) is arranged in an empty sleeve on the circumferential surface of the rotating shaft (2); the fixed block (41) is in a "convex" shape, and a control cavity (411) is provided inside the fixed block (41); a control plate (42) is provided in the middle of the control cavity (411); connecting plates (43) are symmetrically mounted on both sides of the control plate (42); a protruding plate (44) is provided on a side of the connecting plate (43) away from the control plate (42); the protruding plate (44) is connected to the top of the control cavity (411) via a connecting spring (45); and the other end of the protruding plate (44) is connected to the cleaning block (46) via a connecting spring (45).

6. The additive feeding mechanism for preparing biodegradable plastics according to claim 5, characterized in that: The two ends of the control plate (42) and the connecting plate (43) are triangular structures (421). In an initial state, the control plate (42) and the connecting plate (43) are in contact with each other, and the contact portion between the extending plate (44) and the connecting plate (43) is the same triangular structure (421).

7. The additive feeding mechanism for preparing biodegradable plastics according to claim 1, characterized in that: The length of the gyration groove (21) depends on the maximum compression length of the fixing springs (53) arranged above and below the auger blade (51).

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