Granulator for producing recycled plastic granules

Abstract

The invention discloses a granulator for producing reprocessed plastic granules, and relates to the technical field of reprocessed plastic granulation, the granulator comprises an extrusion cylinder, a discharge template, a water tank, a circulating water delivery mechanism and a flushing mechanism, the flushing mechanism comprises a water absorption pressurization mechanism and hollow plates, each cutting knife is fixedly connected with the hollow plate, and the water absorption pressurization mechanism is connected with the water absorption pressurization mechanism. And a spray hole matched with the cutting knife is formed in the hollow plate. The pressurizing piston cylinder absorbs water in a one-way mode through the water inlet and the elastic valve block, the piston block extrudes the sucked water, the sucked water can be conveniently sprayed out through the spray holes distributed in the hollow plate, the water sprayed out through the spray holes rushes into the position between the cutting knife and particles which are not completely opened along the knife face of the cutting knife, and the cutting knife is not completely opened. The inner side of the cut plastic is rapidly cooled and cured, and the situation that the interior is not completely cooled and cured and knife sticking occurs is avoided; meanwhile, water flow can instantly form a lubricating film, cutting resistance is reduced, friction heat between the blade and molten plastic is reduced, and the service life of the blade is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of recycled plastic pelletizing, in particular to a pelletizer for producing recycled plastic pellets. Background Art

[0002] Recycled plastics are usually recycled from waste plastics and then processed through cleaning, crushing, melting, and granulation to be re-made into pellets for reuse. The pelletizer plays a key role in this process, used to cut the molten plastic into pellets.

[0003] The commonly used method of existing recycled plastic pelletizers is water cutting, that is, when the molten plastic is extruded into the cutting chamber by an extrusion mechanism, it forms strips or lines. The cutting blade in the cutting chamber rotates, and water flows around to cool and transport it, so that the extruded plastic cools and solidifies, making it easier for the rotating blade to cut it into pellets.

[0004] The disadvantages of existing recycled plastic pelletizers are that: the existing pelletizers directly cut the extruded plastic by rotating the blade. Although the molten plastic will cool and solidify when it comes into contact with water during extrusion, the outer surface will cool and solidify first, and the interior may not have completely cooled and solidified. When the cutting blade cuts into the plastic, it is easy for the blade to stick, the cutting resistance will be large, and the cutting blade will increase wear, thereby shortening the service life of the cutting blade. Summary of the Invention

[0005] The object of the present invention is to provide a pelletizer for producing recycled plastic particles, so as to solve the technical problem in the prior art that the cutting blades of recycled plastic pelletizing equipment are easily worn during use and the service life is shortened.

[0006] The technical problem to be solved by the present invention can be achieved through the following technical solutions:

[0007] A pelletizer for producing recycled plastic pellets, comprising an extrusion barrel, a discharge template, a water tank, and a circulating water supply mechanism. One end of the extrusion barrel is connected to the water tank, and the discharge template is fixedly mounted at the end of the extrusion barrel connected to the water tank. A plurality of cutting blades are evenly distributed on the surface of the discharge template along the circumference. The pelletizer also includes a flushing mechanism.

[0008] The flushing mechanism includes a water absorption and pressure mechanism and a hollow plate. Each cutting knife is fixedly connected to a hollow plate. The water absorption and pressure mechanism is used to suck water from the water tank. The water absorption and pressure mechanism is connected to each hollow plate. The hollow plate is provided with spray holes that cooperate with the cutting knife. The spray holes are distributed in two rows and are distributed on both sides of the cutting knife.

[0009] Preferably, a driving motor is fixedly mounted on the discharge template, and a turntable is fixedly mounted on the main shaft end of the driving motor; a cavity is opened at the center of the turntable, and a plurality of conduits are fixedly connected to the turntable at equal intervals in the circumferential direction, the hollow plates are fixedly connected to the conduits correspondingly, and each of the hollow plates is connected to the cavity through the corresponding conduit, and the cavity is also connected to the water absorption and pressurization mechanism.

[0010] Preferably, the water absorption and pressurizing mechanism includes a pressurizing piston cylinder, a one-way water inlet mechanism and a linkage reciprocating mechanism. The pressurizing piston cylinder is fixedly arranged on the outside of the turntable, and a one-way valve is arranged between the pressurizing piston cylinder and the cavity. The pressurizing piston cylinder absorbs water from the water tank through the one-way water inlet mechanism. A piston block is slidingly arranged in the pressurizing piston cylinder, and the piston block is connected to the linkage reciprocating mechanism. During the rotation of the turntable, the linkage reciprocating mechanism drives the piston block to reciprocate along the pressurizing piston cylinder.

[0011] Preferably, the one-way water inlet mechanism includes a water inlet and an elastic valve plate, the water inlet is opened on the side wall of one end of the pressurized piston cylinder close to the turntable, the elastic valve plate is tilted and arranged on the inner side of the pressurized piston cylinder, and one side of the elastic valve plate is connected to the inner edge of the water inlet, and the other side is tilted and raised.

[0012] Preferably, the linked reciprocating mechanism includes a fixed inner gear ring, a rolling gear, a speed increasing gear, a steering gear mechanism and a crank mechanism. The fixed inner gear ring is fixedly arranged on one side of the inside of the pressurized piston cylinder, and the axis of the fixed inner gear ring coincides with the axis of the pressurized piston cylinder. The pressurized piston cylinder is fixedly connected to an axle frame on the side close to the fixed inner gear ring. The rolling gear and the speed increasing gear are both rotatably connected to the axle frame through a rotating shaft, and the rolling gear is meshed with the inner ring of the fixed inner gear ring, the speed increasing gear is meshed with the rolling gear, and the speed increasing gear is connected to the crank mechanism through a steering gear mechanism. The crank mechanism pushes and pulls the piston block to reciprocate along the pressurized piston cylinder under the transmission of the steering gear mechanism.

[0013] Preferably, the steering gear mechanism includes a first steering bevel gear and a second steering bevel gear, the first steering bevel gear is coaxially fixedly connected to the speed increasing gear, the second steering bevel gear is rotatably connected to the shaft frame through a rotating shaft, and the second steering bevel gear is meshed with the first steering bevel gear, and the crank mechanism is cooperatively connected between the second steering bevel gear and the piston block.

[0014] Preferably, the crank mechanism includes a boss and a linkage rod, one side of the second steering bevel gear is coaxially fixedly connected to an extension shaft, the boss is fixedly connected to the end of the extension shaft, a push-pull rod is fixedly connected to the piston block, one end of the linkage rod is rotatably connected to the end of the boss through a rotating shaft, and the other end is rotatably connected to the end of the push-pull rod through a rotating shaft.

[0015] Preferably, a protective cylinder is fixedly installed inside the water tank, the side of the pressurizing piston cylinder away from the turntable is inserted into the protective cylinder, and the linked reciprocating mechanism is in the protective cylinder, and the side of the pressurizing piston cylinder close to the protective cylinder is coaxially fixedly connected with a baffle that cooperates with the protective cylinder.

[0016] Preferably, the circulating water supply mechanism includes a water trough and a water pump. The water trough is arranged below the water tank. A drain pipe for discharging water into the water trough is provided at the bottom of the water tank. The water pump is installed in the water trough. A water inlet pipe is connected between the water outlet end of the water pump and the top of the water tank.

[0017] Preferably, a filter box aligned with the drain pipe is installed on one side of the interior of the water tank.

[0018] Beneficial effects of the present invention:

[0019] 1. When the cutter of the present invention is in the process of pelletizing as the turntable rotates, the pressurized piston cylinder relies on the water inlet and the elastic valve plate to absorb water in one direction, and relies on the provided piston block to squeeze the absorbed water, so that the water rushes into the hollow plate connected to the cutter and is sprayed out through the spray holes distributed on the hollow plate. The water sprayed from the spray holes rushes along the blade surface into the space between the cutter and the particles that have not been fully opened, ensuring that the inside of the cut plastic is quickly cooled and solidified, avoiding the situation where the inside is not completely cooled and solidified and the blade sticks; at the same time, the water flow can also instantly form a lubricating film, reduce cutting resistance, reduce the frictional heat between the blade and the molten plastic, and can also impact the plastic that has not been completely cut to a certain extent, assisting its cutting, reducing tool wear, and helping to extend the life of the blade.

[0020] 2. When the turntable of the present invention drives the cutting knife to rotate, it also drives the set pressurized piston cylinder to rotate. The pressurized piston cylinder drives the set rolling gear to roll along the fixed inner gear ring. In this way, the rolling gear rotates, and relies on the speed-increasing gear to drive the first steering bevel gear to rotate. The first steering bevel gear relies on the second steering bevel gear to drive the cam to rotate. The cam, linkage rod and push-pull rod form a crank mechanism, which is convenient for driving the piston block to reciprocate, thereby realizing automatic pressurized water delivery by the pressurized piston cylinder, and there is no need to provide power for the spray hole to spray water separately.

[0021] 3. The present invention relies on a protective tube to cover the fixed internal gear ring, rolling gear, lug and push-pull rod and other transmission mechanisms, and the end of the pressurized piston cylinder relies on a baffle that movably cooperates with the protective tube to close the port of the protective tube, so as to prevent the particles generated during the pelletizing process from contacting the corresponding transmission mechanism and affecting the transmission effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2This is a schematic structural diagram of the relative positions of the discharge template, protective cylinder, pressurized piston cylinder and water tank in the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the cutting blade and the discharge template in the present invention;

[0025] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 5 This is a schematic structural diagram of the relative position distribution of the cutting blade and the nozzle hole in the present invention;

[0027] Figure 6 It is a schematic cross-sectional view of the connection between the water tank and the extrusion barrel in the present invention;

[0028] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure at B in the middle;

[0029] Figure 8 This is a schematic diagram of the structure of the fixed inner gear ring and the protective tube in the present invention;

[0030] Figure 9 This is a schematic structural diagram of the push-pull rod and the first steering bevel gear in the present invention;

[0031] Figure 10 This is a schematic diagram of the structure of the speed increasing gear and the fixed inner gear ring in the present invention;

[0032] Figure 11 It is a structural schematic diagram of the discharge template in the present invention.

[0033] Description of reference numerals:

[0034] 1. Extrusion barrel; 2. Feed pipe; 3. Water tank; 4. Water tank; 5. Filter box; 6. Water pump; 7. Water inlet pipe; 8. Discharge template; 9. Extrusion hole group; 10. Protective cylinder; 11. Baffle; 12. Pressurized piston cylinder; 13. Turntable; 14. Drive motor; 15. Conduit; 16. Cutting knife; 17. Hollow plate; 18. Spray hole; 19. Screw push rod; 20. Cavity; 21. One-way valve; 22. Water inlet; 23. Elastic valve plate; 24. Piston block; 25. Push-pull rod; 26. Fixed inner gear ring; 27. Rolling gear; 28. Speed increasing gear; 29. Shaft frame; 30. Linkage rod; 31. Protruding handle; 32. Extension shaft; 33. Second steering bevel gear; 34. First steering bevel gear. DETAILED DESCRIPTION

[0035] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0036] like Figures 1-11 As shown, a pelletizer for producing recycled plastic particles includes an extrusion barrel 1, a discharge template 8, a water tank 3 and a circulating water supply mechanism. One end of the extrusion barrel 1 is connected to the water tank 3, and the end of the extrusion barrel 1 extends a certain distance to the inside of the water tank 3. The discharge template 8 is fixedly installed on the end of the extrusion barrel 1 connected to the water tank 3. There are multiple groups of extrusion hole groups 9 distributed circumferentially on the discharge template 8. A feed pipe 2 for guiding molten plastic into the extrusion barrel 1 is provided above the end of the extrusion barrel 1 away from the water tank 3. The extrusion barrel 1 is provided with a feeding pipe 2 for pushing the extrusion hole 9. A spiral push rod 19 is used to push the molten plastic toward the discharge template 8. The spiral push rod 19 is driven to rotate by a separately provided servo motor, so that the molten plastic can be extruded from the extrusion hole group 9 into a strip body, which is convenient for cutting into pellets. A circulating water supply mechanism is used to circulate water into the water tank 3 so that the strip material extruded from the extrusion hole group 9 is cooled and solidified. A plurality of cutting knives 16 are equidistantly distributed on the surface of the discharge template 8. Each cutting knife 16 moves in a circle around the discharge template 8 to cut the extruded strip material into pellets.

[0037] The pelletizer also includes a flushing mechanism, which includes a water suction and pressure mechanism and a hollow plate 17. Each cutting knife 16 is fixedly connected to a hollow plate 17. The water suction and pressure mechanism is used to suck water from the water tank 3. The water suction and pressure mechanism is connected to each hollow plate 17. A spray hole 18 is provided on the hollow plate 17. Figures 3 to 5 As shown, the spray holes 18 are distributed in two rows and are distributed on both sides of the cutting blade 16, corresponding to the blade surfaces of the cutting blade 16 on both sides respectively. The central axis of each row of spray holes 18 is parallel to the blade surface of the corresponding cutting blade 16, and sprays along the corresponding blade surface. That is, the spray holes 18 can spray water between the cutting blade 16 and the particles that have not been fully opened during the process of the cutting blade 16 cutting the plastic particles, ensuring that the inside of the cut plastic is quickly cooled and solidified, avoiding the situation where the inside is not completely cooled and solidified and sticking to the blade; at the same time, the water flow directly sprayed between the cutting blade 16 and the particles that have not been completely cut can instantly form a lubricating film, thereby reducing cutting resistance and reducing frictional heat between the blade and the molten plastic. It can also impact the plastic that has not been completely cut to a certain extent to assist in its cutting, thereby helping to extend the life of the blade;

[0038] In some embodiments, combined Figure 2 and Figure 7As shown, a waterproof drive motor 14 (model 1LE1001-1DB43-2FA4) is fixedly mounted on the discharge template 8. A turntable 13 is fixedly mounted on the main shaft end of the drive motor 14, with the central axis of the turntable 13 and the discharge template 8 coinciding. A cavity 20 is defined at the center of the turntable 13. Multiple conduits 15 are fixedly connected to the turntable 13 at equidistant intervals around the circumference. Hollow plates 17 are fixedly connected to the conduits 15, each of which is connected to the cavity 20 via a corresponding conduit 15. The cavity 20 is also connected to the water absorption and pressurization mechanism. The drive motor 14 drives the distributed cutting blades 16 to rotate via the turntable 13, achieving pelletizing.

[0039] In some embodiments, combined Figure 2 and Figure 7 As shown, the water suction and pressurizing mechanism includes a pressurizing piston cylinder 12, a one-way water inlet mechanism and a linkage reciprocating mechanism. The pressurizing piston cylinder 12 is fixedly arranged on the outside of the turntable 13, and the central axes of the two coincide with each other. A one-way valve 21 is provided between the pressurizing piston cylinder 12 and the cavity 20. The one-way valve 21 allows the water in the pressurizing piston cylinder 12 to flow only into the cavity 20 and cannot flow back. The inner diameter of the pressurizing piston cylinder 12 is larger than the inner diameter of the cavity 20 and the one-way valve 21. The inner diameter of the conduit 15 is smaller than the inner diameter of the cavity 20. The hollow plate 17 is flat, and the aperture of the spray hole 18 is much smaller than the inner diameter of the cavity 20. The pressurized piston cylinder 12 absorbs water from the water tank 3 through a one-way water inlet mechanism. A piston block 24 is provided in the pressurized piston cylinder 12 for sliding cooperation. The piston block 24 is connected to the linkage reciprocating mechanism. During the rotation of the turntable 13, the linkage reciprocating mechanism drives the piston block 24 to reciprocate along the pressurized piston cylinder 12, so as to continuously pressurize the water into the cavity 20, and then enter the hollow plate 17 along the conduit 15, and finally spray out from the spray hole 18.

[0040] It should be noted that the extrusion hole groups 9 on the discharge template 8 are distributed in a circular array, and there is a certain angle between two adjacent extrusion hole groups 9, which can cooperate with the intermittent water pressure injection of the piston.

[0041] In some specific embodiments, such as Figure 7As shown, the one-way water inlet mechanism includes a water inlet 22 and an elastic valve plate 23. The water inlet 22 is opened on the side wall of the pressurized piston cylinder 12 at one end close to the turntable 13, and can be distributed in pairs. The elastic valve plate 23 is tilted and arranged on the inner side of the pressurized piston cylinder 12, and one side of the elastic valve plate 23 is connected to the inner edge of the water inlet 22, and the other side is tilted and tilted. It should be noted here that the connection position between the elastic valve plate 23 and the inner edge of the water inlet 22 is elastically connected. When the piston block 24 is at the end of the pressurized piston cylinder 12 away from the turntable 13, the elastic valve plate 23 is in an open state. At this time, the water in the water tank 3 can enter the pressurized piston cylinder 12 through the water inlet 22. When the piston block 24 squeezes the water in the pressurized piston cylinder 12, it is pressurized and transported to the cavity 20, and in this process, the elastic valve plate 23 is deflected and closed by the water pressure.

[0042] It should be noted that in order to prevent the elastic valve plate 23 from affecting the sliding of the piston block 24 along the inside of the pressurized piston cylinder 12 after closing the water inlet 22, a fitting groove that cooperates with the elastic valve plate 23 can be opened at a position near the inside of the pressurized piston cylinder 12 at the water inlet 22, and the shape of the elastic valve plate 23 itself is matched with the inner wall of the pressurized piston cylinder 12, so that it can be effectively fitted into the fitting groove when closed, avoiding the presence of a protrusion that affects the sliding of the piston block 24.

[0043] In some specific embodiments, reference Figures 7 to 10 As shown, the linked reciprocating mechanism includes a fixed inner gear ring 26, a rolling gear 27, a speed-increasing gear 28, a steering gear mechanism and a crank mechanism. The fixed inner gear ring 26 is fixedly arranged on one side of the pressurizing piston cylinder 12, and the axis of the fixed inner gear ring 26 coincides with the axis of the pressurizing piston cylinder 12. The pressurizing piston cylinder 12 is fixedly connected to a shaft frame 29 on one side close to the fixed inner gear ring 26. The rolling gear 27 and the speed-increasing gear 28 are both rotatably connected to the shaft frame 29 through a rotating shaft, and the rolling gear 27 is meshed with the inner ring of the fixed inner gear ring 26, and the speed-increasing gear 28 is meshed with the rolling gear 27. The size of the speed-increasing gear 28 is smaller than that of the rolling gear 27, which can produce a larger transmission ratio. A multi-stage transmission gear can also be set between the speed-increasing gear 28 and the rolling gear 27, and it can be set according to actual needs. The speed-increasing gear 28 is connected to the crank mechanism through the steering gear mechanism. The crank mechanism pushes and pulls the piston block 24 to reciprocate along the pressurizing piston cylinder 12 under the transmission of the steering gear mechanism.

[0044] In some specific embodiments, the steering gear mechanism includes a first steering bevel gear 34 and a second steering bevel gear 33, the first steering bevel gear 34 is coaxially fixedly connected to the speed increasing gear 28, the second steering bevel gear 33 is rotatably connected to the shaft frame 29 through a rotating shaft, and the second steering bevel gear 33 is meshed with the first steering bevel gear 34, and the crank mechanism is cooperatively connected between the second steering bevel gear 33 and the piston block 24.

[0045] Among them, the crank mechanism includes a protruding handle 31 and a connecting rod 30, and an extension shaft 32 is coaxially fixedly connected to one side of the second steering bevel gear 33. The protruding handle 31 is fixedly connected to the end of the extension shaft 32, and the protruding handle 31 and the extension shaft 32 are perpendicular to each other. A push-pull rod 25 is fixedly connected to the piston block 24, and the end of the push-pull rod 25 extends to the outside of the pressurized piston cylinder 12. It should be noted that the end of the push-pull rod 25 can be bent and extended to a position flush with the end of the extension shaft 32 according to the operation needs of the crank mechanism. One end of the connecting rod 30 is rotatably connected to the end of the protruding handle 31 through a rotating shaft, and the other end is rotatably connected to the end of the push-pull rod 25 through a rotating shaft. The rotating shaft set here is parallel to the extension shaft 32. It should also be noted that the distribution position and size of the fixed inner gear ring 26 and the shaft bracket 29 can ensure that they are staggered with the running lug 31 to avoid obstruction; and the lengths of the linkage rod 30 and the lug 31 are set based on the overall movement of the crank mechanism. For example, when the lug 31 rotates to the side of the extension shaft 32 away from the piston block 24 and is in a horizontal position, the piston block 24 just slides to the side of the pressurized piston cylinder 12 away from the turntable 13.

[0046] When the pressurized piston cylinder 12 rotates with the turntable 13, the pressurized piston cylinder 12 drives the set rolling gear 27 to roll along the inner ring of the fixed inner gear ring 26 through the shaft frame 29, and the rolling gear 27 drives the speed-increasing gear 28 to rotate. The speed-increasing gear 28 is smaller than the rolling gear 27, which is convenient for realizing speed-increasing transmission. The speed-increasing gear 28 drives the first steering bevel gear 34 to rotate, and the first steering bevel gear 34 mobilizes the second steering bevel gear 33 to rotate. At this time, the axis around which the second steering bevel gear 33 rotates is perpendicular to the axis of the piston block 24. The second steering bevel gear 33 drives the boss 31 to rotate through the extension shaft 32. During the rotation of the boss 31, the push-pull rod 25 and the piston block 24 are driven back and forth along the pressurized piston cylinder 12 through the linkage rod 30.

[0047] In some specific embodiments, in order to prevent the cut plastic particles from affecting the operation of the components of the linked reciprocating mechanism, including the fixed inner gear ring 26, the rolling gear 27, the speed increasing gear 28, the steering gear mechanism and the crank mechanism, a protective cylinder 10 is fixedly provided inside the water tank 3, and the side of the pressurizing piston cylinder 12 away from the turntable 13 is inserted into the protective cylinder 10, and the linked reciprocating mechanism is in the protective cylinder 10, wherein the fixed inner gear ring 26 is fixedly connected to the inner wall of the protective cylinder 10, and the side of the pressurizing piston cylinder 12 close to the protective cylinder 10 is coaxially fixedly connected with a baffle 11 that cooperates with the protective cylinder 10, and the baffle 11 closes the port of the protective cylinder 10 for inserting the pressurizing piston cylinder 12, and the baffle 11 can move relative to the protective cylinder 10 together with the pressurizing piston cylinder 12.

[0048] The baffle 11 and the protective tube 10 can effectively prevent the cut plastic particles from contacting moving components such as gears.

[0049] In some specific embodiments, the circulating water supply mechanism includes a water trough 4 and a water pump 6. The water trough 4 is arranged below the water tank 3. A drain pipe for discharging water into the water trough 4 is provided at the bottom of the water tank 3. The water pump 6 is installed in the water trough 4. An inlet pipe 7 is connected between the water outlet end of the water pump 6 and the top of the water tank 3. It should be noted that the flow of the water inlet pipe 7 and the drain pipe is balanced, and the inlet and outlet speeds are equal. Before pelletizing, the drain pipe is first blocked and the water pump 6 is started so that a certain amount of water is stored in the water tank 3. Then the drain pipe is opened so that the water pump 6 extracts the water originally in the water trough 4 and continuously circulates it into the water tank 3.

[0050] A filter box 5 aligned with the drain pipe is installed on one side of the interior of the water tank 4. The filter box 5 can conveniently catch particles discharged from the drain pipe and facilitate the separation of particles and water.

[0051] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in conjunction with specific application scenarios:

[0052] First, a certain amount of water is stored in the water tank 4, and then the drain pipe at the bottom of the water tank 3 is blocked, so that the water pump 6 is started and a certain amount of water is delivered to the water tank 3 through the water inlet pipe 7. Then the drain pipe is opened again, and the water pump 6 continues to extract water from the water tank 4 and deliver it to the water tank 3;

[0053] Then the spiral pusher 19 is started to extrude and push the molten plastic out of the extrusion hole group 9 to form a strip, and enter the water tank 3, where it is cooled and solidified by the flowing water. The drive motor 14 drives the distributed cutting blades 16 to rotate through the turntable 13. The cutting blades 16 move in a circular motion along the surface of the discharge template 8 to cut the extruded strip material into particles.

[0054] The rotating turntable 13 drives the pressurizing piston cylinder 12 to rotate together, and the pressurizing piston cylinder 12 drives the provided rolling gear 27 to roll along the inner ring of the fixed inner gear ring 26 through the shaft frame 29, and the rolling gear 27 drives the speed-increasing gear 28 to rotate. The speed-increasing gear 28 is smaller than the rolling gear 27, which is convenient for realizing speed-increasing transmission. The speed-increasing gear 28 drives the first steering bevel gear 34 to rotate, and the first steering bevel gear 34 mobilizes the second steering bevel gear 33 to rotate. At this time, the axis around which the second steering bevel gear 33 rotates is perpendicular to the axis of the piston block 24, and the second steering bevel gear 33 drives the lug 31 to rotate through the extension shaft 32. During the rotation of the lug 31, the push-pull rod 25 and the piston block 24 are driven to reciprocate along the pressurizing piston cylinder 12 through the linkage rod 30;

[0055] When the piston block 24 is at the end of the pressurized piston cylinder 12 away from the rotary disk 13, the elastic valve plate 23 is in the open state. At this time, the water in the water tank 3 can enter the pressurized piston cylinder 12 through the water inlet 22. When the piston block 24 squeezes the water in the pressurized piston cylinder 12, the water is pressurized and transported to the cavity 20. In this process, the elastic valve plate 23 is deflected and closed by the water pressure. The water squeezed by the piston block 24 is pressurized and enters the cavity 20 in the rotary disk 13 through the one-way valve 21. Then, it is diverted to each conduit 15, and then the water flow rushes into the corresponding hollow plate 17. The water is sprayed out through the distributed spray holes 18. The spray holes 18 can spray water between the cutting knife 16 and the particles that have not been fully opened during the process of the cutting knife 16 cutting the plastic particles, ensuring that the inside of the cut plastic is quickly cooled and solidified, avoiding the situation where the inside is not completely cooled and solidified and the knife sticks; at the same time, the water flow directly sprayed between the cutting knife 16 and the particles that are not completely broken can instantly form a lubricating film, reduce the cutting resistance, reduce the friction heat between the blade and the molten plastic, and can also impact the plastic that is not completely broken to a certain extent, assisting its breaking, thereby helping to extend the life of the blade.

[0056] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A pelletizer for producing recycled plastic particles, comprising an extrusion barrel (1), a discharge template (8), a water tank (3) and a circulating water supply mechanism, wherein one end of the extrusion barrel (1) is connected to the water tank (3), the discharge template (8) is fixedly mounted on the end of the extrusion barrel (1) connected to the water tank (3), and a plurality of cutting blades (16) are equidistantly distributed on the surface of the discharge template (8); characterized in that: Also included is the flushing mechanism; The flushing mechanism comprises a water suction and pressurizing mechanism and a hollow plate (17). Each of the cutting blades (16) is fixedly connected to the hollow plate (17). The water suction and pressurizing mechanism is used to suck water from the water tank (3). The water suction and pressurizing mechanism is communicated with each of the hollow plates (17). The hollow plate (17) is provided with spray holes (18) that cooperate with the cutting blade (16). The spray holes (18) are distributed in two rows and are distributed on both sides of the cutting blade (16).

2. A pelletizer for producing recycled plastic particles according to claim 1, characterized in that: A driving motor (14) is fixedly mounted on the discharge template (8), and a turntable (13) is fixedly mounted on the main shaft end of the driving motor (14); a cavity (20) is provided at the center of the turntable (13), and a plurality of conduits (15) are fixedly connected to the turntable (13) at equal intervals in the circumferential direction; the hollow plates (17) are fixedly connected to the conduits (15) correspondingly, and each of the hollow plates (17) is connected to the cavity (20) via the corresponding conduit (15), and the cavity (20) is also connected to a water absorption and pressurization mechanism.

3. A pelletizer for producing recycled plastic particles according to claim 2, characterized in that: The water absorption and pressurizing mechanism comprises a pressurizing piston cylinder (12), a one-way water inlet mechanism and a linkage reciprocating mechanism. The pressurizing piston cylinder (12) is fixedly arranged outside the turntable (13), and a one-way valve (21) is arranged between the pressurizing piston cylinder (12) and the cavity (20). The pressurizing piston cylinder (12) absorbs water from the water tank (3) through the one-way water inlet mechanism. A piston block (24) is provided in a sliding fit in the pressurizing piston cylinder (12). The piston block (24) is connected to the linkage reciprocating mechanism. During the rotation of the turntable (13), the linkage reciprocating mechanism drives the piston block (24) to reciprocate along the pressurizing piston cylinder (12).

4. A pelletizer for producing recycled plastic particles according to claim 3, characterized in that: The one-way water inlet mechanism comprises a water inlet (22) and an elastic valve plate (23). The water inlet (22) is provided on a side wall of the pressurizing piston cylinder (12) close to the turntable (13). The elastic valve plate (23) is tiltedly arranged on the inner side of the pressurizing piston cylinder (12), and one side of the elastic valve plate (23) is connected to the inner edge of the water inlet (22), and the other side is tilted and tilted.

5. A pelletizer for producing recycled plastic particles according to claim 3, characterized in that: The linked reciprocating mechanism comprises a fixed inner gear ring (26), a rolling gear (27), a speed-increasing gear (28), a steering gear mechanism and a crank mechanism. The fixed inner gear ring (26) is fixedly arranged on one side of the inner portion of the pressurizing piston cylinder (12), and the axis of the fixed inner gear ring (26) coincides with the axis of the pressurizing piston cylinder (12). The pressurizing piston cylinder (12) is fixedly connected to a shaft frame (29) on one side close to the fixed inner gear ring (26). The rolling gear (27) and the speed-increasing gear (28) are both rotatably connected to the shaft frame (29) via a rotating shaft, and the rolling gear (27) is meshed with the inner ring of the fixed inner gear ring (26). The speed-increasing gear (28) is meshed with the rolling gear (27). The speed-increasing gear (28) is connected to the crank mechanism via the steering gear mechanism. The crank mechanism pushes and pulls the piston block (24) to reciprocate along the pressurizing piston cylinder (12) under the transmission of the steering gear mechanism.

6. A pelletizer for producing recycled plastic particles according to claim 5, characterized in that: The steering gear mechanism comprises a first steering bevel gear (34) and a second steering bevel gear (33); the first steering bevel gear (34) is coaxially fixedly connected to the speed increasing gear (28); the second steering bevel gear (33) is rotatably connected to the shaft frame (29) via a rotating shaft, and the second steering bevel gear (33) is meshed with the first steering bevel gear (34); and the crank mechanism is cooperatively connected between the second steering bevel gear (33) and the piston block (24).

7. A pelletizer for producing recycled plastic particles according to claim 6, characterized in that: The crank mechanism comprises a boss (31) and a linkage rod (30); one side of the second steering bevel gear (33) is coaxially fixedly connected to an extension shaft (32); the boss (31) is fixedly connected to the end of the extension shaft (32); a push-pull rod (25) is fixedly connected to the piston block (24); one end of the linkage rod (30) is rotatably connected to the end of the boss (31) via a rotating shaft, and the other end is rotatably connected to the end of the push-pull rod (25) via a rotating shaft.

8. A pelletizer for producing recycled plastic particles according to claim 3, characterized in that: A protective cylinder (10) is fixedly arranged inside the water tank (3); the side of the pressurizing piston cylinder (12) away from the turntable (13) is inserted into the protective cylinder (10), and the linked reciprocating mechanism is located in the protective cylinder (10); the side of the pressurizing piston cylinder (12) close to the protective cylinder (10) is coaxially fixedly connected with a baffle (11) that matches the protective cylinder (10).

9. A pelletizer for producing recycled plastic particles according to claim 1, characterized in that: The circulating water supply mechanism comprises a water trough (4) and a water pump (6); the water trough (4) is arranged below the water tank (3); a drain pipe for discharging water into the water trough (4) is provided at the bottom of the water tank (3); the water pump (6) is installed in the water trough (4); and a water inlet pipe (7) is connected between the water outlet end of the water pump (6) and the top of the water tank (3).

10. A pelletizer for producing recycled plastic particles according to claim 9, characterized in that: A filter box (5) aligned with the drain pipe is installed on one side of the interior of the water tank (4).

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