An extrusion mechanism for plastic granulation

Abstract

The present invention provides an extrusion mechanism for plastic granulation, which relates to the technical field of plastic granulation, and includes: an extrusion tube seat; the extrusion tube seat is connected to the front end discharge port of the extruder, an extrusion die is mounted on the front end of the extrusion tube seat, and extrusion holes are arranged inside the extrusion die, and the specifications of the extrusion die are differentiated according to the diameter of the extrusion holes; a high-temperature resistant sealing ring is installed on the outside of the front end of the extrusion tube seat, and the high-temperature resistant sealing ring is located inside the extrusion die. The present invention connects the extrusion die and the extrusion tube seat together by snap-fitting, and the extrusion die can be replaced according to the different sizes of the required particles, making the replacement of the extrusion die easier and more time-saving. The existing plastic granulation extrusion mechanism solves the problem that in the early stage of design and development, in order to ensure the firmness of the connection between the porous die and the fuselage, traditional bolts are mostly used for connection and fixing. When it is necessary to produce plastic particles of other specifications, it is cumbersome and time-consuming to replace the porous die.

Description

Technical Field

[0001] The invention relates to the technical field of plastic granulation, in particular to an extrusion mechanism for plastic granulation. Background Art

[0002] The processing of building plastic products in my country is largely the process of plasticizing building plastic powder and then processing it into shape; the extruder is the most widely used equipment in polymer processing. After the polymer is mixed with various additives, it is sent to the extruder for melting and further mixed evenly, and then passed through a porous die nozzle to form multiple strips, which are then made into pellets.

[0003] For example, the Chinese patent "CN110253817A plastic extruder" includes a frame, the raw material processing mechanism includes a heating chamber arranged in the frame, a first motor is fixedly installed on the top end face of the frame, the lower output shaft of the first motor is fixedly connected to the motor shaft, the motor shaft passes through the heating chamber and rotates with the bottom wall of the heating chamber to feed the plastic raw material into the hopper, the plastic raw material in the hopper enters the heating chamber through the feeding pipe, the heating component heats the raw material in the heating chamber, and the cylinder is used for pushing for injection molding. The internal gap is small, so that the plastic in the injection molding chamber can be completely injected and cleaned. Before injection molding, the melted plastic can be squeezed first to remove the internal air and ensure the injection molding effect.

[0004] At the beginning of the design and development of the existing plastic granulation extrusion mechanism, in order to ensure the firmness of the connection between the porous die nozzle and the machine body, traditional bolts are mostly used for connection and fixation. When it is necessary to produce plastic particles of other specifications, it is cumbersome and time-consuming to replace the porous die nozzle. It is necessary to manually remove the bolts used for fixing with a wrench one by one, and then tighten them again, which is quite time-consuming. Summary of the invention

[0005] The present invention relates to an extrusion mechanism for plastic granulation, which solves the problem that in the initial design and development of the existing extrusion mechanism for plastic granulation, in order to ensure the firmness of the connection between the multi-hole die and the body, traditional bolts are mostly used for connection and fixing. When it is necessary to produce plastic granules of other specifications, it is cumbersome and time-consuming to replace the multi-hole die, and it is necessary to manually remove the bolts used for fixing in turn with a wrench and then tighten them again, which is quite time-consuming.

[0006] In a first aspect of the present disclosure, an extrusion mechanism for plastic granulation is provided, which specifically includes: an extrusion tube seat; the extrusion tube seat is connected to the front end discharge port of the extruder, the front end of the extrusion tube seat is sleeved with an extrusion die nozzle, the interior of the extrusion die nozzle is arranged with extrusion holes in an array, and the extrusion die nozzle is divided into specifications according to the diameter of the extrusion holes; a high-temperature resistant sealing ring is installed on the outside of the front end of the extrusion tube seat, and the high-temperature resistant sealing ring is located in the extrusion die nozzle; a movable positioning sleeve is sleeved on the outside of the extrusion tube seat, and the front end of the movable positioning sleeve is in contact with the extrusion die nozzle; the outside of the extrusion tube seat is connected to a rotation adjustment sleeve, the rotation adjustment sleeve is located outside the movable positioning sleeve, and a handle is provided on the outside of the rotation adjustment sleeve; the outside of the extrusion tube seat is connected to a limiting plug-in, and the limiting plug-in is located between the extrusion die nozzle and the movable positioning sleeve.

[0007] Furthermore, a ring groove is arranged outside the front end of the extrusion tube seat, a high temperature resistant sealing ring is located in the ring groove, the front end of the extrusion tube seat is inserted into the inside of the extrusion die, and the high temperature resistant sealing ring contacts the inner side of the extrusion die.

[0008] Furthermore, the extrusion tube seat is provided with four clamping blocks in a circumferential shape near the outside of the front end, and the extrusion die nozzle is provided with four clamping grooves in a circumferential shape on the outside, and the clamping grooves are L-shaped. The clamping blocks provided on the extrusion tube seat are connected to the clamping grooves, and the extrusion die nozzle and the extrusion tube seat are connected together by clamping. The high-temperature resistant sealing ring has a sealing effect on the connection between the extrusion die nozzle and the extrusion tube seat, and the extrusion die nozzle can be replaced according to the required particle specifications.

[0009] Furthermore, the movable positioning sleeve is slidably connected to the outside of the extrusion tube seat, and four guide blocks are arranged in a surrounding shape on the outside of the extrusion tube seat. The movable positioning sleeve is arranged in a surrounding shape on the outside of the extrusion tube seat, and four movable holes are arranged in a surrounding shape on the outside of the extrusion tube seat. The guide blocks arranged on the extrusion tube seat are slidably connected in the movable holes.

[0010] Furthermore, the front end of the movable positioning sleeve is provided with four positioning plugs in a surrounding shape, and the positioning plugs are inserted into the clamping grooves provided in the extrusion die nozzle.

[0011] Furthermore, a spring is sleeved on the outside of the extrusion tube seat, the rear end of the spring is in contact with the rear end of the extrusion tube seat, and the front end of the spring is in contact with the rear end of the movable positioning sleeve. When the clamping block moves to the innermost end of the clamping groove, the notch of the clamping groove is aligned with the positioning block, and the movable positioning sleeve moves forward under the influence of the spring thrust, so that the positioning block is inserted into the clamping groove, and the extrusion die nozzle is fixed by the movable positioning sleeve to prevent the extrusion die nozzle from rotating.

[0012] Furthermore, the inner side of the rotating adjustment sleeve is in active contact with the outer side of the movable positioning sleeve, and the interior of the rotating adjustment sleeve is provided with four sliding holes in a circumferential shape, the sliding holes are connected to the movable holes, and the guide blocks provided on the extrusion tube seat are slidably connected in the sliding holes.

[0013] Furthermore, the movable positioning sleeve is provided with four force-bearing protrusions in a surrounding shape near the rear end, and the rear end of the rotating adjustment sleeve is provided with four force-bearing inclined surfaces in a surrounding shape. The force-bearing protrusions provided on the movable positioning sleeve are in sliding contact with the force-bearing inclined surfaces. When the extrusion die nozzle connected to the front end of the extrusion tube holder needs to be removed, the rotating adjustment sleeve is driven to rotate by the handle, and the force-bearing protrusions are in contact with the force-bearing inclined surfaces. The rotating adjustment sleeve drives the movable positioning sleeve to move backward, and the spring gradually contracts to separate the positioning block from the clamping groove, thereby releasing the fixation of the extrusion die nozzle.

[0014] Furthermore, four limit grooves are arranged in a circumferential shape on the outside of the extrusion tube seat, and the limit grooves are located between the clamping block and the guide block. The limit plug-in is inserted into the limit grooves provided on the extrusion tube seat, and the front end of the movable positioning sleeve is in contact with the limit plug-in. When the movable positioning sleeve moves to the rearmost end, the limit groove is exposed, and the limit groove is flush with the front end of the movable positioning sleeve. The limit plug-in is inserted into the limit groove so that the limit plug-in is in contact with the front end of the movable positioning sleeve. The movable positioning sleeve is prevented from moving forward and resetting by the limit plug-in, so that both hands can be free to replace the extrusion die nozzle.

[0015] The present invention provides an extrusion mechanism for plastic granulation, which has the following beneficial effects:

[0016] When the present invention is in use, the extrusion die nozzle and the extrusion tube seat are connected together by a snap-fitting manner, and the high-temperature resistant sealing ring has a sealing effect on the connection portion between the extrusion die nozzle and the extrusion tube seat. The extrusion die nozzle can be replaced according to the different sizes of required particle specifications, making the replacement of the extrusion die nozzle easier. The guide block and the movable hole are slidably matched to guide the movement of the movable positioning sleeve. When the snap-fitting block moves to the innermost end of the snap-fitting groove, the notch of the snap-fitting groove is aligned with the positioning plug-in block, and the movable positioning sleeve moves forward under the influence of the spring thrust, so that the positioning plug-in block is plugged into the snap-fitting groove, and the extrusion die nozzle is fixed by the movable positioning sleeve to prevent the extrusion die nozzle from rotating, thereby ensuring the firmness of the connection between the extrusion die nozzle and the extrusion tube seat.

[0017] In addition, when it is necessary to remove the extrusion die nozzle connected to the front end of the extrusion tube holder, the handle is used to drive the rotating adjustment sleeve to rotate, the force-bearing protrusion contacts the force-bearing inclined surface, the rotating adjustment sleeve drives the movable positioning sleeve to move backward, and the spring gradually contracts to separate the positioning plug from the clamping groove, thereby releasing the fixation of the extrusion die nozzle, and the extrusion die nozzle can be rotated in the reverse direction to remove the extrusion die nozzle from the front end of the extrusion tube holder; when the handle is released, the spring pushes the movable positioning sleeve to move forward and reset, and the movable positioning sleeve drives the rotating adjustment sleeve to rotate in the reverse direction and reset.

[0018] In addition, when the movable positioning sleeve moves to the rearmost end, the limit groove is exposed, and the limit groove is flush with the front end of the movable positioning sleeve. The limit plug-in is inserted into the limit groove so that the limit plug-in contacts the front end of the movable positioning sleeve. The limit plug-in prevents the movable positioning sleeve from moving forward and resetting, so that both hands can be free to replace the extrusion die nozzle, which is more user-friendly. When the limit plug-in is separated from the limit groove, the movable positioning sleeve is reset automatically due to the thrust of the spring, thereby achieving the fixing effect of the extrusion die nozzle.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0021] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0022] In the attached picture:

[0023] Figure 1 It shows a schematic diagram of the shaft side structure of the plastic granulation extrusion mechanism of the present application in a state where the movable positioning sleeve is connected to the extrusion die;

[0024] Figure 2 It shows a schematic diagram of the shaft side structure of the plastic granulation extrusion mechanism of the present application in a state where the limit plug-in and the extrusion pipe seat are connected;

[0025] Figure 3 It shows a schematic diagram of the axial structure of the extrusion tube seat and the extrusion die of the extrusion mechanism for plastic granulation of the present application in a separated state;

[0026] Figure 4 The schematic diagram of the axial structure of the extrusion tube seat of the extrusion mechanism for plastic granulation of the present application is shown;

[0027] Figure 5 The schematic diagram of the axial side structure of the extrusion die of the extrusion mechanism for plastic granulation of the present application is shown;

[0028] Figure 6 The schematic diagram of the shaft side structure of the movable positioning sleeve of the extrusion mechanism for plastic granulation of the present application is shown;

[0029] Figure 7 The schematic diagram of the shaft side structure of the rotary adjustment sleeve of the extrusion mechanism for plastic granulation of the present application is shown;

[0030] Figure 8 The schematic diagram of the axial structure of the limiting plug-in of the extrusion mechanism for plastic granulation of the present application is shown.

[0031] Reference numerals list

[0032] 1. Extrusion tube seat; 101. Ring groove; 102. Snap-on block; 103. Guide block; 104. Limiting groove; 2. Extrusion die nozzle; 201. Extrusion hole; 202. Snap-on groove; 3. High temperature resistant sealing ring; 4. Movable positioning sleeve; 401. Movable hole; 402. Positioning plug-in block; 403. Force-bearing protrusion; 5. Rotary adjustment sleeve; 501. Handle; 502. Sliding hole; 503. Force-bearing inclined surface; 6. Spring; 7. Limiting plug-in. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figures 1 to 8 :

[0035] The present invention proposes an extrusion mechanism for plastic granulation, comprising: an extrusion tube seat 1; the extrusion tube seat 1 is connected to the front end discharge port of the extruder, the front end of the extrusion tube seat 1 is sleeved with an extrusion die 2, the inside of the extrusion die 2 is arranged with extrusion holes 201 in an arranged shape, and the extrusion die 2 is divided into specifications according to the diameter of the extrusion holes 201; a high-temperature resistant sealing ring 3 is installed on the outside of the front end of the extrusion tube seat 1, and the high-temperature resistant sealing ring 3 is located in the extrusion die 2; a movable positioning sleeve 4 is sleeved on the outside of the extrusion tube seat 1, and the front end of the movable positioning sleeve 4 is in contact with the extrusion die 2; the outside of the extrusion tube seat 1 is connected to a rotation adjustment sleeve 5, the rotation adjustment sleeve 5 is located outside the movable positioning sleeve 4, and a handle 501 is arranged on the outside of the rotation adjustment sleeve 5; the outside of the extrusion tube seat 1 is connected to a limiting plug-in 7, and the limiting plug-in 7 is located between the extrusion die 2 and the movable positioning sleeve 4. The positioning sleeve 4 is arranged between the positioning sleeves 4; an annular groove 101 is arranged on the outside of the front end of the extrusion tube seat 1, and the high temperature resistant sealing ring 3 is located in the annular groove 101. The front end of the extrusion tube seat 1 is inserted into the inside of the extrusion die nozzle 2, and the high temperature resistant sealing ring 3 contacts the inner side of the extrusion die nozzle 2; four clamping blocks 102 are arranged in a surrounding shape on the outside of the extrusion tube seat 1 near the front end, and four clamping grooves 202 are arranged in a surrounding shape on the outside of the extrusion die nozzle 2. The clamping groove 202 is L-shaped, and the clamping block 102 provided on the extrusion tube seat 1 is connected to the clamping groove 202. The extrusion die nozzle 2 is connected to the extrusion tube seat 1 by clamping. The high temperature resistant sealing ring 3 has a sealing effect on the connection between the extrusion die nozzle 2 and the extrusion tube seat 1. The extrusion die nozzle 2 can be replaced according to the different sizes of the required particles, so that the replacement of the extrusion die nozzle 2 is easier.

[0036] In the embodiment of the present disclosure, the movable positioning sleeve 4 is slidably connected to the outside of the extrusion tube seat 1, and the outside of the extrusion tube seat 1 is provided with four guide blocks 103 in a surrounding shape. The movable positioning sleeve 4 is provided with four movable holes 401 in a surrounding shape. The guide blocks 103 provided on the extrusion tube seat 1 are slidably connected in the movable holes 401. The front end of the movable positioning sleeve 4 is provided with four positioning plugs 402 in a surrounding shape. The positioning plugs 402 are plugged into the clamping groove 202 provided on the extrusion die 2. The outside of the extrusion tube seat 1 is sleeved with a spring 6, and the rear end of the spring 6 is in contact with the rear end of the extrusion tube seat 1. The spring 6 The front end is in contact with the rear end of the movable positioning sleeve 4; by adopting the above-mentioned technical scheme, the guide block 103 is slidably matched with the movable hole 401, which has the effect of guiding the movement of the movable positioning sleeve 4. When the clamping block 102 moves to the innermost end of the clamping groove 202, the notch of the clamping groove 202 is aligned with the positioning plug 402, and the movable positioning sleeve 4 moves forward under the thrust of the spring 6, so that the positioning plug 402 is plugged into the clamping groove 202, and the extrusion die 2 is fixed by the movable positioning sleeve 4 to prevent the extrusion die 2 from rotating, thereby ensuring the firmness of the connection between the extrusion die 2 and the extrusion tube seat 1.

[0037] In the embodiment of the present disclosure, the inner side of the rotating adjustment sleeve 5 is in active contact with the outer side of the movable positioning sleeve 4, the rotating adjustment sleeve 5 is provided with four sliding holes 502 in a circumferential shape, the sliding holes 502 are connected with the movable holes 401, the guide block 103 provided on the extrusion tube seat 1 is slidably connected in the sliding holes 502, the movable positioning sleeve 4 is provided with four force-bearing protrusions 403 in a circumferential shape near the rear end, and the rear end of the rotating adjustment sleeve 5 is provided with four force-bearing inclined surfaces 503 in a circumferential shape, and the force-bearing protrusions 403 provided on the movable positioning sleeve 4 are in sliding contact with the force-bearing inclined surfaces 503; adopting the above technical solution, when it is necessary to extrusion tube 1, the outer side of the rotating adjustment sleeve 5 is provided with four force-bearing protrusions 403 in a circumferential shape, and the force-bearing protrusions 403 provided on the movable positioning sleeve 4 are in sliding contact with the force-bearing inclined surfaces 503. When the extrusion die nozzle 2 connected to the front end of the tube outlet seat 1 is removed, the handle 501 is used to drive the rotating adjustment sleeve 5 to rotate, the force-bearing protrusion 403 contacts the force-bearing inclined surface 503, and the rotating adjustment sleeve 5 drives the movable positioning sleeve 4 to move backward, and the spring 6 gradually contracts to separate the positioning plug 402 from the clamping groove 202, thereby releasing the fixation of the extrusion die nozzle 2, and the extrusion die nozzle 2 can be rotated in the reverse direction to remove the extrusion die nozzle 2 from the front end of the extrusion tube seat 1; when the handle 501 is released, the spring 6 pushes the movable positioning sleeve 4 to move forward and reset, and the movable positioning sleeve 4 drives the rotating adjustment sleeve 5 to rotate in the reverse direction and reset.

[0038] Embodiment 2, on the basis of embodiment 1, the outside of the extrusion tube seat 1 is provided with four limiting grooves 104 in a circumferential shape, the limiting grooves 104 are located between the clamping block 102 and the guide block 103, the limiting plug-in 7 is inserted into the limiting grooves 104 provided on the extrusion tube seat 1, and the front end of the movable positioning sleeve 4 is in contact with the limiting plug-in 7; adopting the above technical scheme, when the movable positioning sleeve 4 moves to the rear end, the limiting grooves 104 are exposed, and the limiting grooves 104 are flush with the front end of the movable positioning sleeve 4, the limiting plug-in 7 is inserted into the limiting grooves 104, so that the limiting plug-in 7 is in contact with the front end of the movable positioning sleeve 4, and the movable positioning sleeve 4 is prevented from moving forward and resetting by the limiting plug-in 7, so that both hands can be free to replace the extrusion die 2, which is more humane; when the limiting plug-in 7 is separated from the limiting grooves 104, the movable positioning sleeve 4 is automatically reset under the influence of the thrust of the spring 6, so as to achieve the fixing effect of the extrusion die 2.

[0039] The working principle of this embodiment is as follows: first, the handle 501 is used to drive the rotating adjustment sleeve 5 to rotate, the force-bearing protrusion 403 is in contact with the force-bearing inclined surface 503, and the rotating adjustment sleeve 5 drives the movable positioning sleeve 4 to move backward, and the spring 6 gradually contracts; when the movable positioning sleeve 4 moves to the rear end, the limiting groove 104 is exposed, and the limiting groove 104 is flush with the front end of the movable positioning sleeve 4, and the limiting plug-in 7 is inserted into the limiting groove 104 so that the limiting plug-in 7 contacts with the front end of the movable positioning sleeve 4, and the movable positioning sleeve 4 is prevented from moving forward and resetting by the limiting plug-in 7; the extrusion die nozzle 2 is connected to the front end of the extrusion tube seat 1, and the clamping block 102 is connected to the clamping groove 202, and the extrusion die nozzle 2 is connected to the extrusion tube seat 1 by clamping. The high temperature resistant sealing ring 3 has a sealing effect on the connection between the extrusion die nozzle 2 and the extrusion tube seat 1, and the extrusion die nozzle 2 can be replaced according to the different particle sizes required; When the clamping block 102 moves to the innermost end of the clamping groove 202, the notch of the clamping groove 202 is aligned with the positioning plug block 402, the limiting plug 7 is separated from the limiting groove 104, and the movable positioning sleeve 4 is moved forward by the thrust of the spring 6, so that the positioning plug block 402 is inserted into the clamping groove 202, and the extrusion die nozzle 2 is fixed by the movable positioning sleeve 4 to prevent the extrusion die nozzle 2 from rotating, thereby ensuring the firmness of the connection between the extrusion die nozzle 2 and the extrusion tube holder 1; when it is necessary to replace the extrusion die nozzle 2, it is only necessary to drive the movable positioning sleeve 4 to move backward by rotating the adjustment sleeve 5 to separate the positioning plug block 402 from the clamping groove 202, release the fixation of the extrusion die nozzle 2, and then re-insert the limiting plug 7 into the limiting groove 104 to fix the movable positioning sleeve 4, so that both hands can be freed to rotate the extrusion die nozzle 2 in the opposite direction, and the extrusion die nozzle 2 is removed from the front end of the extrusion tube holder 1, so that the extrusion die nozzle 2 is replaced more easily.

[0040] In this article, there are a few points to note:

[0041] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0042] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0043] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An extrusion mechanism for plastic granulation, comprising: An extrusion tube seat (1); characterized in that the extrusion tube seat (1) is connected to the front end discharge port of the extruder, the front end of the extrusion tube seat (1) is sleeved with an extrusion die (2), the interior of the extrusion die (2) is provided with extrusion holes (201) arranged in an array, and the extrusion die (2) is distinguished in specifications according to the diameter of the extrusion holes (201); a high temperature resistant sealing ring (3) is installed on the outside of the front end of the extrusion tube seat (1), and the high temperature resistant sealing ring (3) is located in the extrusion die (2); the outside of the extrusion tube seat (1) is sleeved with a movable positioning sleeve (4), and the front end of the movable positioning sleeve (4) is in contact with the extrusion die (2); the outside of the extrusion tube seat (1) is connected with a rotating adjustment sleeve (5), the rotating adjustment sleeve (5) is located outside the movable positioning sleeve (4), and a handle (501) is provided on the outside of the rotating adjustment sleeve (5); the outside of the extrusion tube seat (1) is connected with a limiting plug-in (7), and the limiting plug-in (7) is located between the extrusion die (2) and the movable positioning sleeve (4 ); the front end of the extrusion tube seat (1) is provided with an annular groove (101), the high temperature resistant sealing ring (3) is located in the annular groove (101), the front end of the extrusion tube seat (1) is plugged into the inside of the extrusion die (2), and the high temperature resistant sealing ring (3) contacts the inner side of the extrusion die (2); the extrusion tube seat (1) is provided with four clamping blocks (102) in a surrounding shape near the front end, the outside of the extrusion die (2) is provided with four clamping grooves (202) in a surrounding shape, the clamping grooves (202) are L-shaped, and the clamping blocks (102) provided on the extrusion tube seat (1) are connected to the clamping grooves (202); the movable positioning sleeve (4) is slidably connected to the outside of the extrusion tube seat (1), the outside of the extrusion tube seat (1) is provided with four guide blocks (103) in a surrounding shape, the outside of the movable positioning sleeve (4) is provided with four movable holes (401) in a surrounding shape, and the guide blocks (103) provided on the extrusion tube seat (1) are slidably connected to the inside of the movable holes (401).

2. A plastic granulation extrusion mechanism according to claim 1, characterized in that: The front end of the movable positioning sleeve (4) is provided with four positioning plugs (402) in a surrounding shape, and the positioning plugs (402) are inserted into the clamping grooves (202) provided in the extrusion die nozzle (2).

3. A plastic granulation extrusion mechanism according to claim 1, characterized in that: The extrusion tube seat (1) is externally sleeved with a spring (6), the rear end of the spring (6) is in contact with the rear end of the extrusion tube seat (1), and the front end of the spring (6) is in contact with the rear end of the movable positioning sleeve (4).

4. A plastic granulation extrusion mechanism according to claim 1, characterized in that: The inner side of the rotating adjustment sleeve (5) is in movable contact with the outer side of the movable positioning sleeve (4); four sliding holes (502) are arranged in a circumferential shape inside the rotating adjustment sleeve (5); the sliding holes (502) are connected to the movable hole (401); and the guide block (103) provided on the extrusion tube seat (1) is slidably connected in the sliding holes (502).

5. The extrusion mechanism for plastic granulation according to claim 1, characterized in that: The movable positioning sleeve (4) is provided with four force-bearing protrusions (403) in a circumferential shape on the outside near the rear end, and the rear end of the rotary adjustment sleeve (5) is provided with four force-bearing inclined surfaces (503) in a circumferential shape, and the force-bearing protrusions (403) provided on the movable positioning sleeve (4) are in sliding contact with the force-bearing inclined surfaces (503).

6. The extrusion mechanism for plastic granulation according to claim 1, characterized in that: The extrusion tube seat (1) is provided with four limiting grooves (104) in a circumferential shape on the outside, the limiting grooves (104) being located between the clamping block (102) and the guide block (103), the limiting plug-in (7) being inserted into the limiting grooves (104) provided on the extrusion tube seat (1), and the front end of the movable positioning sleeve (4) being in contact with the limiting plug-in (7).

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