Plastic recycling granulation device

Abstract

A plastic regenerating granulating device, comprising a die assembly, the die assembly comprising a perforated plate, a positioning sleeve, a first pressure regulating piece, a second pressure regulating piece and a granulator head, the first pressure regulating piece and the second pressure regulating piece being arranged in a space surrounded by the perforated plate, the positioning sleeve and the granulator head, the first pressure regulating piece being provided with a pressure regulating hole penetrating through the first pressure regulating piece along a main shaft direction of the first pressure regulating piece, the orifices on both sides of the pressure regulating hole being a first orifice and a second orifice respectively, the aperture of the pressure regulating hole being gradually reduced from the first orifice to the second orifice, the second pressure regulating piece comprising a main body section, the outer shape of the main body section being arranged in a conical structure, the inner wall of a flow guide hole of the first pressure regulating piece and the outer side surface of the main body section of the second pressure regulating piece jointly forming a flow guide space, the internal space of the flow guide space being gradually reduced to the middle part from the perforated plate to the granulator head. The present application avoids too fast or too slow local flow rate, thereby realizing the effect of uniform discharging.

Description

Technical Field

[0001] This invention relates to a plastic recycling processing equipment, and more particularly to a plastic recycling granulation equipment. Background Technology

[0002] In the field of plastic recycling and processing, granulators are one of the key pieces of equipment, used to melt and extrude recycled plastics and cut them into uniform granules for subsequent reuse. Traditional granulators mainly rely on a screw extrusion system with a fixed die for material discharge. However, due to factors such as changes in the viscosity of molten plastic, uneven feeding, and temperature fluctuations, the pressure distribution inside the die is uneven, resulting in inconsistent extrusion speeds. This leads to granules of varying lengths after cutting, which not only reduces the quality of recycled plastics but also increases the waste rate, affecting economic efficiency.

[0003] To address the issue of uneven material output from traditional pellet mills, which negatively impacts the quality of plastic pellets, some manufacturers have attempted to improve output uniformity by optimizing screw structure and adjusting die orifice diameter. However, these methods have yielded limited results and fail to effectively resolve the problem of inconsistent pellet lengths after cutting. Some manufacturers have adopted mechanical pressure stabilizing devices, but these suffer from drawbacks such as complex structure, susceptibility to damage, and difficulty in maintenance.

[0004] Therefore, there is an urgent need for a method to fundamentally solve the problem of inconsistent plastic granule lengths and improve the production stability and product quality of granulators. Summary of the Invention

[0005] Therefore, it is necessary to provide a plastic recycling and granulation equipment to address the shortcomings of existing technologies.

[0006] A plastic recycling and granulation device includes a conveying device, a die head assembly disposed in front of and connected to the conveying device, and a cutting device disposed in front of the die head assembly. The die head assembly includes a perforated plate, a positioning sleeve, a first pressure regulating component, a second pressure regulating component, and a granulator head. The perforated plate and the granulator head are mounted on the positioning sleeve from both sides. The first pressure regulating component and the second pressure regulating component are disposed within a space enclosed by the perforated plate, the positioning sleeve, and the granulator head. The first pressure regulating component has a pressure regulating hole that penetrates the first pressure regulating component along its main axis. The openings on both sides of the pressure regulating hole are a first opening and a second opening, respectively. The diameter of the first opening is larger than that of the second opening. The diameter of the opening in the pressure regulating hole gradually decreases from the first opening towards the second opening. The second pressure regulating component includes a main body section and a locking section connected to one end of the main body section. The main body section has a conical shape. The outer diameter of the main body section gradually decreases from the direction away from the locking section. Furthermore, the outer diameter of the main body section at the end near the locking section is smaller than the diameter of the second opening.

[0007] During assembly, the second pressure regulating component passes through the pressure regulating hole of the first adjusting component. The first pressure regulating component surrounds the outer periphery of the second pressure regulating component. The two ends of the second pressure regulating component are respectively installed on the perforated plate and the granulator head. The inner wall of the guide hole of the first pressure regulating component and the outer side of the main body section of the second pressure regulating component form a guide space. On the central plane of the second pressure regulating component, the inclination angle of the inner wall of the guide hole is the same as the inclination angle of the main body section but opposite in direction. The size of the internal space of the guide space gradually shrinks from the perforated plate toward the granulator head toward the center.

[0008] In one embodiment, a limiting groove is provided in the middle of the inner side of the granulator head, and a positioning hole is provided in the middle of one side of the perforated plate. The internal space of the positioning hole is conical, and the diameter of the positioning hole gradually shrinks from the outside to the inside. The main body of the second pressure regulating component is inserted into the positioning hole of the perforated plate, and the locking section of the second pressure regulating component is locked in the limiting groove of the granulator head.

[0009] In one embodiment, the granulator head and the first pressure regulating component form a communication port, which is connected to the flow guiding space.

[0010] In one embodiment, the granulator head is provided with an outlet hole, the outlet hole including a first outlet section and a second outlet section. The first outlet section is disposed on the inner side of the granulator head, and the second outlet section penetrates the granulator head along the main axis direction. The first pressure regulating member is pressed against the inner side of the granulator head and part of the slot of the first outlet section. The slot of the first outlet section that is close to the second pressure regulating member and is not pressed by the first pressure regulating member forms a communication port.

[0011] In one embodiment, the second leading segment corresponds one-to-one with the first leading segment, the first leading segments are evenly spaced around the center of the limiting groove, and the second leading segment is evenly spaced around the center of the limiting groove.

[0012] In one embodiment, the porous plate is further provided with densely distributed guide holes, which penetrate the porous plate along the axial direction of the porous plate and form a circular guide area. The positioning hole is located at the center of the guide area, and the guide holes are evenly spaced on the guide area 421.

[0013] In one embodiment, the conveying device includes a conveying pipe, the conveying pipe includes a pipe body and docking plates connected to both ends of the pipe body, a slot is provided on the hole wall at the front side of the pipe body, the die head assembly also includes a bushing, the bushing is disposed in the slot, and the perforated plate presses the bushing.

[0014] In one embodiment, the bushing is arranged in a ring shape, with a feed hole in the middle of the bushing, and the flow guiding area of ​​the perforated plate is aligned with the feed hole in the middle of the bushing.

[0015] In one embodiment, the positioning sleeve includes a main shaft and connecting plates connected to both ends of the main shaft. The main shaft has a hollow structure and a main channel is provided on the main shaft, which runs through the main shaft along its main axis. The inner wall size of the main channel corresponds to that of the perforated plate. The outer surface of the first pressure regulating component is in close contact with the inner surface of the main channel.

[0016] In one embodiment, the cutting device includes a drive motor, a blade holder connected to the drive motor, a cutting blade assembly mounted on the blade holder, an outer cover, and a receiving hopper located below the outer cover. The outer cover covers the outside of the blade holder and the cutting blade assembly. The die head assembly extends into the outer cover. The drive motor drives the cutting blade assembly to rotate through the blade holder to cut the strip-shaped plastic from the die head assembly into pellets.

[0017] The beneficial effects of the plastic recycling granulation equipment of the present invention are as follows: by setting a first pressure regulating component and a second pressure regulating component between the perforated plate and the granulator head, the first pressure regulating component is provided with a gradually narrowing guide hole, and the main body of the second pressure regulating component is conical. The second pressure regulating component passes through the pressure regulating hole of the first pressure regulating component, thereby making the internal space of the guide space gradually narrow from the perforated plate toward the granulator head toward the center. The inclination angle of the inner wall of the guide hole is the same as the inclination angle of the main body and the opposite direction. Under the action of the outer side of the conical second pressure regulating component and the hole wall of the guide hole, the pressure is gradually transferred to the connecting port position, so that the melt flow direction gradually converges, reducing turbulence or eddies, avoiding excessively fast or slow local flow velocity, stabilizing the flow velocity, and thus achieving the effect of uniform discharge. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the plastic recycling and granulation equipment of the present invention;

[0019] Figure 2 , Figure 3 These are exploded views of the plastic recycling and granulation equipment of the present invention from different angles, in which the heating furnace is not shown;

[0020] Figure 4 , Figure 5 This is an exploded view of the mold head assembly at different angles in this invention;

[0021] Figure 6 This is a cross-sectional view of the plastic recycling and granulation equipment of the present invention;

[0022] Figure 7 for Figure 6 Enlarged view of part A in the middle circle. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] Please see Figures 1 to 7 This invention provides a plastic recycling and granulation equipment for processing recycled plastic into plastic granules. Before processing, the recycled plastic is first crushed. The plastic recycling and granulation equipment includes a heating furnace 10, a conveying device 20 passing through the heating furnace 10, a drive device 30 located behind the conveying device 20 and powered by the conveying device 20, a die assembly 40 located in front of the conveying device 20 and connected to the conveying device 20, and a cutting device 50 located in front of the die assembly 40. The conveying device 20 extrudes and conveys the plastic granule raw material forward. The heating furnace 10 heats the plastic granule raw material on the conveying device 20. Under high temperature and high pressure, the plastic granule waste is in a molten state and enters the die assembly 40 and flows out from the die assembly 40. The cutting device 50 cuts the strip-shaped plastic flowing out of the die assembly 40 into granules.

[0030] The cutting device 50 includes a drive motor 51, a blade holder 52 connected to the drive motor 51, a cutting blade assembly 53 mounted on the blade holder 52, an outer cover 54, and a receiving hopper 55 located below the outer cover 54. The outer cover 54 covers the outside of the blade holder 52 and the cutting blade assembly 53. The die head assembly 40 extends into the outer cover 54. The drive motor 51 drives the cutting blade assembly 53 to rotate through the blade holder 52 to cut the strip-shaped plastic from the die head assembly 40 into pellets.

[0031] The conveying device 20 includes a conveying pipe 21, a driving component 22, and a feeding hopper 23. The conveying pipe 21 includes a pipe body 211 and docking plates 212 connected to both ends of the pipe body 211. The pipe body 211 has a hollow structure, and a slot 213 is provided on the hole wall at the front side of the pipe body 211. The driving component 22 includes a rod body 221 and a spiral blade 222 connected to the outer surface of the rod body 221. During assembly, the rod body 221 passes through the pipe body 211, and the spiral blade 222 is disposed inside the pipe body 211 and between the rod body 221. One end of the rod body 221 is connected to the driving device 30. The feeding hopper 23 is installed at the rear side of the conveying pipe 21.

[0032] The die head assembly 40 includes a bushing 41, a perforated plate 42, a positioning sleeve 43, a first pressure regulating component 44, a second pressure regulating component 45, and a granulator head 46. The perforated plate 42 and the granulator head 46 are mounted on the positioning sleeve 43 from both sides. The granulator head 46 is mounted on the positioning sleeve 43 at the end away from the perforated plate 42. The first pressure regulating component 44 and the second pressure regulating component 45 are disposed within the space enclosed by the perforated plate 42, the positioning sleeve 43, and the granulator head 46. The second pressure regulating component 45 passes through the first pressure regulating component 44, and its two ends are respectively mounted on the perforated plate 42 and the granulator head 46.

[0033] Specifically, the bushing 41 is generally arranged in a ring shape, with a feed hole 41 in the middle of the bushing 41, which penetrates the bushing 41 along its axial direction. The perforated plate 42 is arranged in a circular plate shape, with a positioning hole 422 in the middle of the side of the perforated plate 42 facing away from the bushing 41. The internal space of the positioning hole 422 is conical, and the diameter of the positioning hole 422 gradually narrows from the outside to the inside. The perforated plate 42 is also provided with densely distributed guide holes 423, which penetrate the perforated plate 42 along its axial direction. The guide holes 423 form a circular guide area 421, and the positioning hole 422 is located at the center of the guide area 421. The guide holes 423 are evenly spaced on the guide area 421.

[0034] The positioning sleeve 43 includes a main shaft 431 and connecting plates 432 connected to both ends of the main shaft 431. The main shaft 431 has a hollow structure and a main channel 433 is provided on the main shaft 431, which penetrates the main shaft 431 along the main axis direction. The inner wall size of the main channel 433 corresponds to that of the perforated plate 42.

[0035] The first pressure regulating component 44 is generally cylindrical in shape. The first pressure regulating component 44 is provided with a pressure regulating hole 441. The pressure regulating hole 441 penetrates the first pressure regulating component 44 along the main axis direction. The openings on both sides of the pressure regulating hole 441 are the first opening 442 and the second opening 443, respectively. The diameter of the first opening 442 is larger than that of the second opening 443. Furthermore, the size of the first opening 442 is equal to or slightly larger than the size of the flow guiding region 421. The diameter of the opening in the pressure regulating hole 441 gradually narrows from the first opening 442 toward the second opening 443.

[0036] The second pressure regulating component 45 includes a main body section 451 and a locking section 452 connected to one end of the main body section 451. The main body section 451 has a tapered shape. The outer diameter of the main body section 451 gradually shrinks from the direction away from the locking section 452. Furthermore, the outer diameter of the main body section 451 at the end near the locking section 452 is smaller than the diameter of the second orifice 443.

[0037] The granulator head 46 is generally circular in shape. A limiting groove 461 is provided in the middle of the inner side of the granulator head 46. The granulator head 46 is also provided with an outlet hole 462. The outlet hole 462 includes a first outlet section 463 and a second outlet section 464. The first outlet section 463 is provided in the inner side of the granulator head 46. The second outlet section 464 passes through the granulator head 46 along the main axis direction. The second outlet section 464 corresponds one-to-one with the first outlet section 463. The first outlet sections 463 are evenly spaced around the center of the limiting groove 461. The second outlet sections 464 are also evenly spaced around the center of the limiting groove 461.

[0038] During assembly, a connecting plate 432 of the positioning sleeve 43 is fixed to a docking plate 212 on the conveying pipe 21 near the slot 213 by screws. The bushing 41 is set in the slot 213. The perforated plate 42 extends from the main channel 433 of the positioning sleeve 43 into the slot 213 and presses the bushing 41. The flow guiding area 421 of the perforated plate 42 is aligned with the feed hole 41 in the middle of the bushing 41. The first pressure regulating component 44 is set in the main channel 433 and presses the perforated plate 42. The outer side of the first pressure regulating component 44 is tightly fitted with the inner side of the main channel 433. One side of the first pressure regulating component 44 with the first orifice 442 is set near the perforated plate 42. The flow guiding area 421 is aligned with the first orifice 442 of the pressure regulating hole 441. The second pressure regulating component 45 passes through the pressure regulating hole 441 of the first adjusting component. The granulator head 46 is fixed to the connecting plate 432 on the positioning sleeve 43 away from the perforated plate 42 by screws. The locking section 452 of the second pressure regulating component 45 is locked in the limiting groove 461 of the granulator head 46. The main body section 451 of the second pressure regulating component 45 is locked into the positioning hole 422 of the perforated plate 42. The second pressure regulating component 45 presses the perforated plate 42.

[0039] The first pressure regulating member 44 is pressed against the inner side of the granulator head 46 and part of the slot of the first outlet section 463. The slot of the first outlet section 463, which is close to the second pressure regulating member 45 and is not pressed by the first pressure regulating member 44, forms a connecting port 465. The first pressure regulating member 44 surrounds the outer periphery of the second pressure regulating member 45. The inner wall of the guide hole 423 of the first pressure regulating member 44 and the outer side of the main body section 451 of the second pressure regulating member 45 together form a guide space 47. On the central plane of the second pressure regulating member 45, the inclination angle of the inner wall of the guide hole 423 is the same as and opposite to the inclination angle of the main body section 451, so that the internal space of the guide space 47 gradually shrinks from the porous plate 42 toward the granulator head 46 toward the center. The connecting port 465 is connected to the guide space 47.

[0040] During operation, the heating furnace 10 heats the conveying device 20, and the driving device 30 drives the conveying device 20 to feed material forward. The plastic granule waste is put into the feed hopper 23 and flows from the feed hopper 23 into the conveying device 20. The conveying device 20 squeezes the plastic granule raw material and conveys it forward. Under the action of high temperature and high pressure, the plastic granule waste is in a molten state and enters the guide space 47 through the guide hole 423 of the perforated plate 42. By setting the perforated plate 42, on the one hand, the molten plastic granules can be filtered to prevent impurities or incompletely molten plastic granules from entering the guide space 47. On the other hand, the perforated plate 42 and the conveying device 20 cooperate to form a high-pressure flow channel to squeeze the plastic granule raw material. At the same time, the perforated plate 42 can reduce the impact of pressure fluctuations inside the conveying device 20 on the pressure inside the guide space 47. Under high pressure, molten plastic in the flow space 47 flows in from the connecting port 465 and the first outlet section 463 and flows out from the second outlet section 464. The cutting device 50 cuts the plastic flowing out from the second outlet section 464 into pellets.

[0041] The beneficial effects of the plastic recycling granulation equipment of the present invention are as follows: by setting a first pressure regulating component 44 and a second pressure regulating component 45 between the perforated plate 42 and the granulator head 46, the first pressure regulating component 44 is provided with a gradually narrowing guide hole 423, and the main body section 451 of the second pressure regulating component 45 is tapered. The second pressure regulating component 45 passes through the pressure regulating hole 441 of the first regulating component, thereby causing the internal space of the guide space 47 to gradually narrow from the perforated plate 42 toward the granulator head 46 toward the center. The inclination angle of the inner wall of the guide hole 423 is the same as the inclination angle of the main body section 451 but opposite in direction. Under the action of the outer side of the tapered second pressure regulating component 45 and the hole wall of the guide hole 423, the pressure is gradually transferred to the connecting port 465, so that the melt flow direction gradually converges, reducing turbulence or eddies, avoiding excessively fast or slow local flow velocity, stabilizing the flow velocity, and thus achieving the effect of uniform discharge.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A plastic recycling and granulation equipment, comprising a conveying device, a die assembly disposed in front of and connected to the conveying device, and a cutting device disposed in front of the die assembly, characterized in that, The die head assembly includes a perforated plate, a positioning sleeve, a first pressure regulating component, a second pressure regulating component, and a granulator head. The perforated plate and the granulator head are mounted on the positioning sleeve from both sides. The first and second pressure regulating components are disposed within the space enclosed by the perforated plate, the positioning sleeve, and the granulator head. The first pressure regulating component has a pressure regulating hole that penetrates the first pressure regulating component along its main axis. The openings on both sides of the pressure regulating hole are the first opening and the second opening, respectively. The diameter of the first opening is larger than that of the second opening. The diameter of the hole inside the pressure regulating hole is... The second pressure regulating component gradually tapers from the first orifice toward the second orifice. It includes a main body section and a locking section connected to one end of the main body section. The main body section has a conical shape, and its outer diameter gradually tapers away from the locking section. Furthermore, the outer diameter of the main body section at the end closest to the locking section is smaller than the diameter of the second orifice. A limiting groove is provided in the middle of the inner side of the granulator head, and a positioning hole is provided in the middle of one side of the perforated plate. The internal space of the positioning hole is conical, and the diameter of the positioning hole gradually tapers from the outside to the inside. During assembly, the second pressure regulating component passes through the pressure regulating hole of the first positioning component, and the first pressure regulating component surrounds the outer periphery of the second pressure regulating component. The two ends of the second pressure regulating component are respectively installed on the perforated plate and the granulator head. The inner wall of the guide hole of the first pressure regulating component and the outer side of the main body section of the second pressure regulating component form a guide space. On the central plane of the second pressure regulating component, the inclination angle of the inner wall of the guide hole is the same as the inclination angle of the main body section but opposite in direction. The size of the internal space of the guide space gradually shrinks from the perforated plate toward the granulator head toward the center. The main body section of the second pressure regulating component is inserted into the positioning hole of the perforated plate, and the positioning section of the second pressure regulating component is engaged in the limiting groove of the granulator head.

2. The plastic recycling and granulation equipment according to claim 1, characterized in that, The granulator head and the first pressure regulating component form a communication port, which is connected to the flow guiding space.

3. The plastic recycling and granulation equipment according to claim 2, characterized in that, The granulator head is provided with an outlet hole, which includes a first outlet section and a second outlet section. The first outlet section is located on the inner side of the granulator head, and the second outlet section passes through the granulator head along the main axis direction. The first pressure regulating member is pressed against the inner side of the granulator head and part of the slot of the first outlet section. The slot of the first outlet section that is close to the second pressure regulating member and is not pressed by the first pressure regulating member forms a communication port.

4. The plastic recycling and granulation equipment according to claim 3, characterized in that, The second leading segment corresponds one-to-one with the first leading segment. The first leading segments are evenly spaced around the center of the limiting groove, and the second leading segments are evenly spaced around the center of the limiting groove.

5. The plastic recycling and granulation equipment according to claim 1, characterized in that, The perforated plate is also provided with densely distributed flow guide holes, which penetrate the perforated plate along the axial direction of the perforated plate and form a circular flow guide area. The positioning hole is set at the center of the flow guide area, and the flow guide holes are evenly spaced on the flow guide area.

6. The plastic recycling and granulation equipment according to claim 5, characterized in that, The conveying device includes a conveying pipe, which includes a pipe body and connecting plates at both ends of the pipe body. A slot is provided on the hole wall at the front side of the pipe body. The die head assembly also includes a bushing, which is disposed in the slot. The perforated plate presses the bushing.

7. The plastic recycling and granulation equipment according to claim 6, characterized in that, The bushing is arranged in a ring shape, with a feed hole in the middle of the bushing. The flow guiding area of ​​the perforated plate is aligned with the feed hole in the middle of the bushing.

8. The plastic recycling and granulation equipment according to claim 1, characterized in that, The positioning sleeve includes a main shaft and connecting plates connected to both ends of the main shaft. The main shaft has a hollow structure and a main channel is provided on the main shaft. The main channel runs through the main shaft along the main axis direction. The inner wall size of the main channel corresponds to the perforated plate, and the outer side of the first pressure regulating component is in close contact with the inner side of the main channel.

9. The plastic recycling and granulation equipment according to claim 1, characterized in that, The cutting device includes a drive motor, a blade holder connected to the drive motor, a cutting blade assembly mounted on the blade holder, an outer cover, and a receiving hopper located below the outer cover. The outer cover covers the outside of the blade holder and the cutting blade assembly. The die head assembly extends into the outer cover. The drive motor drives the cutting blade assembly to rotate through the blade holder to cut the strip-shaped plastic from the die head assembly into pellets.

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