Feeding mechanism of thermoplastic polyurethane rubber extruder

Abstract

The utility model discloses a feeding mechanism of a thermoplastic polyurethane rubber extruder, which comprises a bottom frame, an extruder, a feeding pipe arranged above the bottom frame, and a position connected above the rear end part of an extrusion pipeline of the extruder, a storage barrel is arranged above the feeding pipe, and a blanking pipe corresponding to the feeding pipe is connected below the storage barrel. The upper end of the feeding pipe and the lower end of the discharging pipe are both arranged to be in an arc shape with the extrusion pipeline as the circle center. One side of the upper portion of the discharging pipe communicates with a shell, a sliding plate is slidably connected into the shell, and symmetrically-arranged springs are connected between the sliding plate and the shell. The upper end of the feeding pipe and the lower end of the discharging pipe are both arranged to be in the arc shape with the extrusion pipeline as the circle center, it can be guaranteed that when the discharging pipe rotates to the position of the feeding pipe, the upper end of the discharging pipe can be attached to the upper end of the feeding pipe, and raw material particles can be prevented from leaking out of the discharging pipe without descending a storage barrel and the discharging pipe; the operation steps are reduced, and meanwhile, the cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rubber production, and specifically relates to a feeding mechanism for a thermoplastic polyurethane rubber extruder. Background Art

[0002] Thermoplastic polyurethane rubber is a material that combines the elasticity of rubber and the easy processability of thermoplastic plastics, and has excellent elasticity, wear resistance, oil resistance and chemical resistance. It can be shaped by heating and then cooled, and is widely used in the fields of shoe soles, mobile phone cases, industrial parts, medical devices and 3D printing, etc., but its high-temperature resistance is poor, and the temperature needs to be precisely controlled during processing.

[0003] Patent CN212194135U discloses a feeding device for a rubber extruder. By pouring raw materials into the barrel and making the raw materials fall under the agitation of the stirring plate, however, since the position of the machine body is often relatively high, when the staff pours the raw materials into the barrel, they need to climb to the position of the barrel, which is inconvenient and unsafe.

[0004] Patent CN218227772U discloses a rubber extruder that is convenient for feeding. Through the cooperation of a driving motor, a driving gear and a rotating frame, the feeding hopper is rotated down from a high place, so that the staff does not need to climb to the feeding hopper to feed. However, since the feeding hopper and the rotating frame are rotatably connected, in order to meet the normal movement of the feeding hopper, a certain distance needs to be maintained between the bottom opening of the feeding hopper and the feeding port of the extrusion barrel. However, this setting will cause the raw materials to spill from the gap. In order to avoid the spillage of raw materials, an electric telescopic rod is added, so that the bottom opening of the feeding hopper extends deep into the feeding port of the extrusion barrel, increasing the cost and operation steps while reducing the efficiency. And in order to prevent the raw materials from spilling from the feeding hopper, a control valve is arranged at the bottom of the feeding hopper, which also increases the cost and operation steps while reducing the efficiency. Summary of the Utility Model

[0005] In order to solve the technical problems of increasing cost, operation steps and reducing efficiency, the utility model provides a feeding mechanism for a thermoplastic polyurethane rubber extruder.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A feeding mechanism for a thermoplastic polyurethane rubber extruder includes a chassis,

[0008] An extruder is installed above the chassis,

[0009] A feed pipe is connected above the rear end of the extrusion pipe of the extruder,

[0010] There is a storage bucket above the feed pipe. A blanking pipe corresponding to the feed pipe is connected below the storage bucket. The upper end of the feed pipe and the lower end of the blanking pipe are both set as circular arcs with the extrusion pipe as the center of the circle.

[0011] On one side above the blanking pipe, there is a housing connected. Inside the housing, there is a sliding plate connected in a sliding manner. Between the sliding plate and the housing, there are symmetrically arranged springs connected. On the side of the sliding plate close to the limiting plate, there is a dial rod connected, and the dial rod is far from the spring. At the position of the blanking pipe corresponding to the dial rod, there is an activity groove opened. The dial rod is slidably connected in the activity groove. Inside the activity groove, there is a closing rod slidably connected. The closing rod is connected to the dial rod. On the side of the dial rod far from the housing, there is a dial plate, and the dial rod is in contact with the dial plate.

[0012] Preferably, there is a feed port above one side of the storage bucket. A sealing cover is threadedly connected outside the feed port. Inside the sealing cover, there is a plugging block connected, and the plugging block is located inside the feed port.

[0013] Preferably, on the side of the feed pipe close to the sealing cover, there is a baffle connected. On the side of the feed pipe far from the baffle, there is a leak-proof plate, and the leak-proof plate is close to the housing. The leak-proof plate is set as a circular arc with the extrusion pipe as the center of the circle.

[0014] Preferably, on one side of the storage bucket close to the rear end of the extrusion pipe, there is a connecting plate connected. At the position of the extrusion pipe corresponding to the connecting plate outside, there is a rotating ring rotatably connected. The connecting plate is connected to the rotating ring. Outside the rotating ring, there is a half gear connected. The half gear and the connecting plate are arranged staggeredly outside the rotating ring. Below the half gear, there is a full gear engaged. On the side of the full gear far from the storage bucket, there is a motor connected, and the motor is installed on the chassis.

[0015] Preferably, there are a plurality of evenly arranged balls rollingly connected inside the rotating ring, and the balls are in contact with the outside of the extrusion pipe.

[0016] Preferably, on the position of the extrusion pipe above corresponding to the rotating ring, there are symmetrically arranged limiting plates connected. The rotating ring is located between the limiting plates. Above the limiting plate close to the dial rod, at the position corresponding to the dial rod, there is a connection with the dial plate.

[0017] Preferably, a first guiding plate is obliquely connected inside the storage bucket. The end of the first guiding plate close to the sealing cover is at the lower end of the inclination, and there is a gap between the lower end of the first guiding plate and the inner wall of the storage bucket, forming a blanking channel.

[0018] Preferably, symmetrically arranged second guiding plates are obliquely connected below the first guiding plate inside the storage bucket.

[0019] Preferably, a speed-reducing plate is rotatably connected at the lower end of the first guiding plate corresponding to the upper part of the second guiding plate. The gap between the lower end of the speed-reducing plate and the second guiding plate is smaller than the diameter of the raw material particles.

[0020] Preferably, a rotating rod is rotatably connected to the lower part inside the blanking pipe. A plurality of blanking plates are arranged in a circumferential array on the outer side of the rotating rod. The blanking plates are close to the inner wall of the blanking pipe. One end of the rotating rod penetrates through the blanking pipe and is connected to a motor fixedly connected to the outer side of the blanking pipe.

[0021] The beneficial effects of the present utility model:

[0022] By setting both the upper end of the feeding pipe and the lower end of the blanking pipe as circular arcs with the extrusion pipe as the center, it can be ensured that when the blanking pipe rotates to the position of the feeding pipe, the upper end of the blanking pipe can be close to the upper end of the feeding pipe, and it is not necessary to lower the storage bucket and the blanking pipe to prevent raw material particles from leaking out of the blanking pipe, reducing the operation steps and saving costs at the same time.

[0023] Through the driving motor, with the cooperation of the full gear and the half gear, the storage bucket and the blanking pipe are rotated clockwise by 90°. At this time, the sealing cover is located directly above the storage bucket and is parallel to the horizontal plane. And at this time, the dial rod is not restricted by the dial plate, so that the slide plate is located outside the housing under the action of the spring, blocking the upper part of the blanking pipe. By opening the sealing cover, raw material particles are added into the storage bucket;

[0024] After the raw material particles are filled, the motor is driven again to rotate the storage bucket and the blanking pipe counterclockwise by 90°. During the rotation, the dial rod will contact the dial plate. At this time, the dial rod is restricted and cannot continue to rotate. The storage bucket, the blanking pipe and the housing will continue to rotate under the action of the half gear. As a result, the slide plate will slide into the housing. When the storage bucket and the blanking pipe rotate counterclockwise by 90°, the slide plate completely enters the housing and no longer blocks the lower part of the blanking pipe. With the cooperation of the first guide plate, the second guide plate, the slow-down plate and the continuously rotating blanking plates, the raw material particles will be evenly added into the extrusion pipe through the feeding pipe. It is not necessary to additionally set a control valve to control the falling of the raw material particles, reducing the operation steps and saving costs at the same time. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a three-dimensional view of a feeding mechanism of a thermoplastic polyurethane rubber extruder of the present utility model;

[0027] Figure 2 It is a three-dimensional view of the other side of a feeding mechanism of a thermoplastic polyurethane rubber extruder of the present utility model;

[0028] Figure 3 This is a three-dimensional view of the semi-gear and full-gear at the feeding mechanism of a thermoplastic polyurethane rubber extruder of the present utility model;

[0029] Figure 4 This is a sectional view of the storage barrel at the feeding mechanism of a thermoplastic polyurethane rubber extruder of the present utility model;

[0030] Figure 5 This is a sectional view of the outer shell at the feeding mechanism of a thermoplastic polyurethane rubber extruder of the present utility model;

[0031] Figure 6 This is a front view of the storage barrel at the feeding mechanism of a thermoplastic polyurethane rubber extruder of the present utility model.

[0032] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0033] 1. Chassis; 2. Semi-gear; 3. Outer shell; 4. First guide plate; 5. Rotating rod;

[0034] 11. Extrusion pipe; 12. Feed pipe; 121. Baffle; 122. Anti-leakage plate; 13. Storage barrel; 131. Feed inlet; 132. Sealing cover; 133. Blocking block; 14. Discharge pipe; 15. Connecting plate; 16. Rotating ring; 17. Ball; 18. Limiting plate;

[0035] 21. Full-gear; 22. Motor;

[0036] 31. Slide plate; 32. Spring; 33. Poking rod; 34. Activity groove; 35. Sealing rod; 36. Poking plate;

[0037] 41. Second guide plate; 42. Speed-reducing plate;

[0038] 51. Discharge plate; 52. Motor. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0040] Please refer to Figure 1 - Figure 6 As shown in the figure, a feeding mechanism of a thermoplastic polyurethane rubber extruder includes a chassis 1. An extruder is installed above the chassis 1. The rear end upper part of the extrusion pipe 11 of the extruder is connected with a feed pipe 12 for adding raw material particles;

[0041] Above the feed pipe 12, there is a storage bin 13 for storing raw material particles.

[0042] Above one side of the storage bin 13, there is a feed inlet 131 for adding raw material particles.

[0043] The outer side of the feed inlet 131 is threadedly connected with a sealing cover 132 for sealing the feed inlet 131 to prevent the raw material particles from leaking out of the storage bin 13.

[0044] Inside the sealing cover 132, there is a blocking block 133. The blocking block 133 is located inside the feed inlet 131. The sealing cover 132 and the blocking block 133 cooperate to close the feed inlet 131 and block the raw material particles to prevent the raw material particles from entering the feed inlet 131 and the sealing cover 132, resulting in some raw material particles remaining in the storage bin 13 and unable to fall into the extrusion pipe 11.

[0045] Below the storage bin 13, there is a blanking pipe 14 corresponding to the feed pipe 12. With the cooperation of the blanking pipe 14, the storage bin 13 adds the raw material particles into the extrusion pipe 11 through the feed pipe 12 for extrusion work.

[0046] The upper end of the feed pipe 12 and the lower end of the blanking pipe 14 are both set as circular arcs with the extrusion pipe 11 as the center. By this setting method, when the blanking pipe 14 rotates to the position of the feed pipe 12, the upper end of the blanking pipe 14 can be close to the upper end of the feed pipe 12, preventing the raw material particles from leaking out of the blanking pipe 14 without the need to lower the storage bin 13 and the blanking pipe 14, reducing the operation steps and saving costs at the same time.

[0047] On one side of the feed pipe 12 close to the sealing cover 132, there is a baffle 121 for blocking the blanking pipe 14 to prevent the storage bin 13 and the blanking pipe 14 from rotating too much, resulting in the blanking pipe 14 not corresponding to the feed pipe 12.

[0048] On the side of the feed pipe 12 away from the baffle 121, there is a leak-proof plate 122. The leak-proof plate 122 is set as a circular arc with the extrusion pipe 11 as the center. By this setting method, when the blanking pipe 14 has not rotated to the position of the feed pipe 12, the lower end of the blanking pipe 14 first touches the upper surface of the leak-proof plate 122 to prevent the raw material particles from leaking out of the blanking pipe 14.

[0049] Inside the storage bin 13, there is a first guide plate 4 connected obliquely for guiding the raw material particles to the lower part of the storage bin 13. At the same time, the first guide plate 4 has the function of slowing down the raw material particles to prevent the raw material particles from falling too fast and blocking in the blanking pipe 14.

[0050] One end of the first guide plate 4 close to the sealing cover 132 is at the inclined lower end, and there is a gap between the lower end of the first guide plate 4 and the inner wall of the storage barrel 13, forming a blanking channel through which the raw material particles can fall. In this way, when there are raw material particles in the storage barrel 13 and during the rotation of the storage barrel 13, the first guide plate 4 will block the raw material particles to prevent them from directly falling into the blanking pipe 14 and causing blockage of the blanking pipe 14. When the storage barrel 13 rotates to a state close to perpendicular to the horizontal plane, the raw material particles will fall.

[0051] Symmetrically arranged second guide plates 41 are inclined and connected below the first guide plate 4 at the lower part inside the storage barrel 13 for guiding the raw material particles to the middle of the blanking pipe 14;

[0052] A slow-down plate 42 is rotatably connected above the second guide plate 41 corresponding to the lower end of the first guide plate 4. The distance between the lower end of the slow-down plate 42 and the second guide plate 41 is smaller than the diameter of the raw material particles. When the raw material particles fall under the cooperation of the first guide plate 4 and the second guide plate 41, the raw material particles will contact the slow-down plate 42 and push the slow-down plate 42 to rotate, so that the slow-down plate 42 can slow down the falling speed of the raw material particles and avoid blockage of the blanking pipe 14.

[0053] A rotating rod 5 is rotatably connected below the inside of the blanking pipe 14. A plurality of blanking plates 51 are circumferentially arrayed on the outer side of the rotating rod 5. By rotating the rotating rod 5 and the blanking plates 51, the raw material particles can be evenly added into the extrusion pipe 11;

[0054] The blanking plate 51 is close to the inner wall of the blanking pipe 14 to prevent the raw material particles from falling through the gap between the blanking plate 51 and the blanking pipe 14;

[0055] One end of the rotating rod 5 penetrates through the blanking pipe 14 and is connected to a motor 52 fixed on the outside of the blanking pipe 14. The motor 52 is used to drive the rotating rod 5 to rotate.

[0056] A connecting plate 15 is connected to one side of the storage barrel 13 close to the rear end of the extrusion pipe 11. A rotating ring 16 is rotatably connected to the position corresponding to the connecting plate 15 outside the extrusion pipe 11. The connecting plate 15 is connected to the rotating ring 16, and the rotating ring 16 is used to drive the storage barrel 13 and the blanking pipe 14 to rotate;

[0057] A plurality of evenly arranged balls 17 are rollably connected inside the rotating ring 16. The balls 17 are in contact with the outside of the extrusion pipe 11 and are used to assist the rotation of the rotating ring 16, reduce the friction between the rotating ring 16 and the extrusion pipe 11, and enable the rotating ring 16 to rotate smoothly;

[0058] Symmetrically arranged limit plates 18 are connected to the position of the rotating ring 16 above the extrusion pipe 11. The rotating ring 16 is located between the limit plates 18. The limit plates 18 are used to limit the position of the rotating ring 16 to prevent the limit ring from shifting.

[0059] The outer side of the rotating ring 16 is connected with the half gear 2, and the half gear 2 and the connecting plate 15 are staggered and arranged on the outer side of the rotating ring 16 to prevent the connecting plate 15 from affecting the rotation of the half gear 2;

[0060] A full gear 21 is meshed below the half gear 2, and the full gear 21 is used to drive the half gear 2 and the rotating ring 16 to rotate. The full gear 21 cooperates with the half gear 2 to enable the rotating ring 16 to rotate 90° clockwise or counterclockwise, thereby facilitating the addition of raw material particles into the storage barrel 13, while ensuring that the discharge pipe 14 can correspond to the feed pipe 12 after rotation;

[0061] A motor 22 is connected to the side of the full gear 21 away from the material storage barrel 13 . The motor 22 is mounted on the base frame 1 . The motor 22 is used to drive the full gear 21 to rotate.

[0062] The upper side of the feeding pipe 14 near the anti-leakage plate 122 is connected to the outer shell 3, and a slide plate 31 is slidably connected in the outer shell 3 to block the upper side of the feeding pipe 14;

[0063] A symmetrically arranged spring 32 is connected between the slide plate 31 and the housing 3 to reset the slide plate 31;

[0064] A lever 33 is connected to one side of the slide plate 31 close to the limit plate 18, and the lever 33 is away from the spring 32, and is used to move the slide plate 31 so that the slide plate 31 slides into the housing 3;

[0065] A movable groove 34 is formed at the position of the feed tube 14 corresponding to the lever 33. The lever 33 is slidably connected in the movable groove 34. A closing rod 35 is slidably connected in the movable groove 34. The closing rod 35 is connected to the lever 33 to close the movable groove 34.

[0066] A lever plate 36 is connected to the position of the lever 33 above the limit plate 18 close to the lever 33. The lever plate 36 is arranged on the side of the lever 33 away from the shell 3. The lever 33 fits the lever plate 36. The lever plate 36 is used to limit the moving position of the lever 33. Under the action of the lever plate 36, the lever 33 can drive the slide plate 31 to slide into the shell 3.

[0067] Working principle:

[0068] After the raw material particles inside the storage bin 13 are used up, through the driving motor 22, under the cooperation of the full gear 21 and the half gear 2, the storage bin 13 and the blanking pipe 14 are rotated clockwise by 90°. At this time, the sealing cover 132 is located directly above the storage bin 13, parallel to the horizontal plane, and the lever 33 is not restricted by the baffle 36 at this time. Under the action of the spring 32, the slide plate 31 is located outside the housing 3, blocking the upper part of the blanking pipe 14. By opening the sealing cover 132, the raw material particles are added into the storage bin 13. After the raw material particles are added, the sealing cover 132 is installed again. Under the action of the first guide plate 4, the raw material particles will be in a static state and will not move. After the raw material particles are filled, the driving motor 22 is driven again to rotate the storage bin 13 and the blanking pipe 14 counterclockwise by 90°. During the rotation, due to too many raw material particles inside the storage bin 13, a small part of the raw material particles will fall above the slide plate 31. And during the rotation, the lever 33 will contact the baffle 36. At this time, the lever 33 is restricted and cannot continue to rotate. The storage bin 13, the blanking pipe 14 and the housing 3 will continue to rotate under the action of the half gear 2. As a result, the slide plate 31 will slide into the housing 3. When the storage bin 13 and the blanking pipe 14 are rotated counterclockwise by 90°, the slide plate 31 completely enters the housing 3 and no longer blocks the lower part of the blanking pipe 14. Under the cooperation of the first guide plate 4, the second guide plate 41, the speed reducing plate 42 and the continuously rotating blanking plate 51, the raw material particles will be evenly added into the extrusion pipe 11 through the feed pipe 12. It is not necessary to additionally set a control valve to control the falling of the raw material particles, reducing the operation steps and saving costs at the same time.

[0069] In the description of the specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0070] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of this technology make various modifications or supplements to the described specific embodiments or use similar ways to replace them. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. Feeding mechanism of a thermoplastic polyurethane rubber extruder, including a chassis (1), an extruder, installed above the chassis (1), a feed pipe (12), connected above the rear end of the extrusion pipe (11) of the extruder, It is characterized in that: a storage bucket (13) is arranged above the feed pipe (12), a blanking pipe (14) corresponding to the feed pipe (12) is connected below the storage bucket (13), and the upper end of the feed pipe (12) and the lower end of the blanking pipe (14) are both set to be arc-shaped with the extrusion pipe (11) as the center of the circle; one side above the blanking pipe (14) is communicated with a housing (3), a slide plate (31) is slidably connected in the housing (3), symmetrically arranged springs (32) are connected between the slide plate (31) and the housing (3), a lever (33) is connected to one side of the slide plate (31) close to the limit plate (18), and the lever (33) is far from the spring (32). An activity slot (34) is opened at the position of the blanking pipe (14) corresponding to the lever (33), the lever (33) is slidably connected in the activity slot (34), a closing rod (35) is slidably connected in the activity slot (34), the closing rod (35) is connected to the lever (33), a dial plate (36) is arranged on the side of the lever (33) far from the housing (3), and the lever (33) is in contact with the dial plate (36).

2. The feeding mechanism of a thermoplastic polyurethane rubber extruder according to claim 1, characterized in that: a feed port (131) is arranged above one side of the storage bucket (13), a sealing cover (132) is threadedly connected outside the feed port (131), a plugging block (133) is connected inside the sealing cover (132), and the plugging block (133) is located in the feed port (131).

3. The feeding mechanism of a thermoplastic polyurethane rubber extruder according to claim 2, characterized in that: a baffle (121) is connected to one side of the feed pipe (12) close to the sealing cover (132), a leak-proof plate (122) is arranged on the side of the feed pipe (12) far from the baffle (121), and the leak-proof plate (122) is close to the housing (3), and the leak-proof plate (122) is set to be arc-shaped with the extrusion pipe (11) as the center of the circle.

4. The feeding mechanism of a thermoplastic polyurethane rubber extruder according to claim 3, characterized in that: a connecting plate (15) is connected to one side of the storage bucket (13) close to the rear end of the extrusion pipe (11), a rotating ring (16) is rotatably connected to the position of the extrusion pipe (11) corresponding to the connecting plate (15) outside, the connecting plate (15) is connected to the rotating ring (16), a semi-gear (2) is connected to the outside of the rotating ring (16), the semi-gear (2) and the connecting plate (15) are arranged staggeredly on the outside of the rotating ring (16), a full gear (21) is engaged below the semi-gear (2), and a motor (22) is connected to the side of the full gear (21) far from the storage bucket (13), and the motor (22) is installed on the chassis (1).

5. The feeding mechanism of a thermoplastic polyurethane rubber extruder according to claim 4, characterized in that: a plurality of uniformly arranged balls (17) are rollably connected inside the rotating ring (16), and the balls (17) are in contact with the outside of the extrusion pipe (11).

6. The feeding mechanism of a thermoplastic polyurethane rubber extruder according to claim 5, characterized in that: symmetrically arranged limit plates (18) are connected to the position of the extrusion pipe (11) corresponding to the rotating ring (16) above, the rotating ring (16) is located between the limit plates (18), and the dial plate (36) is connected to the position corresponding to the lever (33) above the limit plate (18) close to the lever (33).

7. The feeding mechanism of a thermoplastic polyurethane rubber extruder according to claim 6, characterized in that: Inside the storage bin (13), a first guiding plate (4) is inclinedly connected. The end of the first guiding plate (4) close to the sealing cover (132) is at the lower inclined end, and there is a gap between the lower end of the first guiding plate (4) and the inner wall of the storage bin (13) to form a feeding channel.

8. The feeding mechanism of a thermoplastic polyurethane rubber extruder according to claim 7, characterized in that: Below the first guiding plate (4) inside the storage bin (13) and corresponding to it, symmetrically arranged second guiding plates (41) are inclinedly connected.

9. The feeding mechanism of a thermoplastic polyurethane rubber extruder according to claim 8, characterized in that: A speed-reducing plate (42) is rotatably connected above the second guiding plate (41) corresponding to the lower end of the first guiding plate (4). The gap between the lower end of the speed-reducing plate (42) and the second guiding plate (41) is smaller than the diameter of the raw material particles.

10. The feeding mechanism of a thermoplastic polyurethane rubber extruder according to claim 9, characterized in that: Inside the lower part of the feeding pipe (14), a rotating rod (5) is rotatably connected. A plurality of feeding plates (51) are circumferentially arrayed on the outer side of the rotating rod (5). The feeding plates (51) are close to the inner wall of the feeding pipe (14). One end of the rotating rod (5) penetrates through the feeding pipe (14) and is connected to a motor (52) fixed on the outer side of the feeding pipe (14).

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