A granulator for plastic recycling and method of use thereof

Abstract

The application provides a granulator for plastic recycling and a use method thereof, and relates to the technical field of plastic recycling equipment, and comprises a control and support system, the control and support system comprises a control box and a support frame, a PLC controller, a control panel electrically connected with the PLC controller and an AI control module are installed on the control box, and the support frame is installed on the rear side of the control box; an extrusion part is installed on the top of the support frame, the extrusion part comprises a heating extrusion box and a double-stage screw rod, and a heating pipe control end in the heating extrusion box is electrically connected with the PLC controller. By setting the double-stage screw rod and electromagnetic induction heating, the plastic is further plasticized, the PLC system monitors and adjusts the process parameters in real time, intelligent control and automatic production are realized, the plastic melt can be uniformly plasticized, the energy consumption of the equipment is reduced, and the plasticizing efficiency is improved, so that the defect that the plasticizing efficiency of the existing plastic granulator is relatively low is overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic recycling equipment, and particularly relates to a granulator for plastic recycling and a use method thereof. BACKGROUND

[0002] Plastic recycling is an important way to achieve the "double carbon" goal, and its core is to convert waste plastics into high-value recycled particles through a granulator. Traditional granulators have significant technical bottlenecks in the field of plastic recycling. For example, there is a contradiction between plasticizing efficiency and energy consumption: single-screw structure relies on mechanical friction to generate heat, and the plasticizing efficiency for high-density waste plastics is relatively low, and the energy consumption per unit product is high. In addition, after plastic extrusion, the end of the plastic strip needs to be manually wound around the cooling water tank and sent to the cutting machine port. During this period, the plastic strip is prone to have different lengths, which makes it difficult to achieve automatic leveling through the tractor when the end is sent to the cutting machine, so that the particles are sent with bends and straight, and the cutting particle size is not uniform. When water-cooled, the length of the water tank needs to be relatively long to achieve the cooling effect, resulting in a large area occupied by the granulator.

[0003] Therefore, it is of great practical significance to develop a plastic granulator that can improve plasticizing efficiency, clamp the end of the plastic strip to achieve uniform feeding into the cutting machine, shorten the length of the water-cooled tank, and facilitate replacement of the extrusion die. SUMMARY

[0004] The present application relates to the technical field of plastic recycling equipment, and particularly relates to a granulator for plastic recycling and a use method thereof.

[0005] The first aspect of the present disclosure provides a granulator for plastic recycling and a method for using the same, which specifically comprises a control and support system, an extrusion component, a cooling tank, a clamping auxiliary and a cutting machine; the control and support system comprises a control box and a support frame, a PLC controller is installed on the control box, and an operation panel and an AI control module connected with the PLC controller are connected with the control box in an electrical manner, and the support frame is installed on the rear side of the control box; the extrusion component is installed on the top of the support frame, and the extrusion component comprises a heating extrusion box and a double-stage screw, a heating pipe control end in the heating extrusion box is connected with the PLC controller in an electrical manner, the double-stage screw is installed at the center of the heating pipe in the heating extrusion box, the end of the double-stage screw and the inside of the heating extrusion box are provided with a second connecting plate, the inside of the second connecting plate is clamped with an extrusion die, the inside of the cooling tank is provided with a cooling inner assembly, the cooling inner assembly comprises an upper frame and a lower frame, the upper frame is inserted above the lower frame, and the plastic strip extruded by the heating extrusion box passes through the fixed shafts in the upper frame and the lower frame, the controller of the cutting machine is installed in the control box, the right end surface of the cutting machine is provided with a traction port, and the traction port is higher than the top surface of the cooling tank.

[0006] In at least some embodiments, the right section of the double-stage screw is a first-stage crushing screw, the screw is relatively thick, and is used for crushing and preliminary plasticizing of the material, the left section of the double-stage screw is a second-stage precise plasticizing screw, the screw rib of the outer wall of the second-stage precise plasticizing screw is smaller than that of the first-stage crushing screw, the pitch of the second-stage precise plasticizing screw is smaller than that of the first-stage crushing screw, the plastic melt is further plasticized through electromagnetic induction heating, the PLC system monitors and adjusts the process parameters in real time, thereby realizing intelligent control and automatic production, the plastic melt is uniformly plasticized, the heating plasticizing pipe is arranged outside the double-stage screw, the end of the heating plasticizing pipe is fixedly connected with a first connecting plate, the left end surface of the first connecting plate is fixedly connected with an extrusion die connecting piece through a bolt assembly, and the end of the extrusion die connecting piece is connected with a second connecting plate through a thread.

[0007] In at least some embodiments, the upper frame and the lower frame are lower than the cooling tank in height, clamping rods are fixedly welded at the front and rear ends of the right side of the outer portion of the upper frame, connecting rods one are fixedly welded at the front and rear ends of the right side of the outer portion of the lower frame, the connecting rods one are clamped on the arc-shaped supporting plates at the top end of the lifting rods, the bottom surface of the upper frame is fixedly connected with a plug-in plate, the plug-in plate is inserted into the rectangular groove on the top surface of the lower frame, the bottom portion of the upper frame is staggered with arc-shaped protruding plates and arc-shaped grooves, the top portion of the lower frame is staggered with arc-shaped protruding plates and arc-shaped grooves, the arc-shaped protruding plates of the upper frame are clamped with the arc-shaped grooves of the lower frame, and the guide rollers are rotatably clamped on the arc-shaped protruding plates through shafts.

[0008] In at least some embodiments, the right top portion of the heating extrusion box is provided with a feeding port, the feeding port is installed directly below the discharge port of the extruder, and a temperature control meter is installed on the top portion of the heating extrusion box and the left side of the feeding port.

[0009] In at least some embodiments, the clamping aid comprises a handle and a clamping plate, the handle is provided with two, the two handles are fixedly connected with the baffle at the opposite end, the opposite end of the handle is fixedly connected with the third connecting plate, the opposite surface of the two third connecting plates is provided with a vertical T-shaped slide rail, the inside of the third connecting plate is provided with a through hole, the two third connecting plates are fixedly connected with the connecting rod two, the handle is sleeved with the push plate, the top end of the push plate is provided with an arc-shaped handle, the two ends of the clamping plate are clamped on the T-shaped slide rail, the outside of the clamping plate is provided with a clamping plate, the inside of the clamping plate is fixedly connected with the elastic cord, and the elastic cord is fixedly connected to the push plate after penetrating through the third connecting plate.

[0010] In at least some embodiments, the right end surface of the extrusion die is provided with a protruding rectangular frame outside, the rectangular frame is clamped in the inside of the extrusion die connecting piece, and the right end surface of the extrusion die is flush with the left end surface of the extrusion die connecting piece.

[0011] In at least some embodiments, the right end surface of the cutting machine is provided with a traction port, two groups of traction rollers are installed in the inside of the traction port, the upper and lower two of the traction rollers are a group, and the plastic pull strip is conveyed between each group of traction rollers, and the left end surface of the cutting machine is additionally provided with a pellet outlet made of a telescopic pipe.

[0012] In at least some embodiments, the right end of the cooling tank is provided with a lifting rod on the front and rear sides, respectively, the top end of the lifting rod is fixedly connected with an arc-shaped supporting plate, and the right side top surface of the cooling tank is provided with a clamping plate, two grooves are formed in the left side of the clamping plate, the upper groove is horizontal, and the lower groove is right-angled.

[0013] In at least some embodiments, the right end top surface of the support frame is fixedly connected with a support plate, the top of the support plate is provided with a driving motor, the driving shaft of the driving motor is coaxially connected with a gearbox, and the output shaft of the gearbox is coaxially connected to a double-stage screw rod, the driving motor is used for rotatingly driving the double-stage screw rod, and no external cover is arranged to ensure the heat dissipation of the driving motor after long-time use.

[0014] The application discloses an interactive control method of a building construction distance and direction measuring device.

[0015] 1), preliminary plasticization: the plastic viscous fluid of the extruder is put into the feeding port, and the material is crushed and preliminarily plasticized by the first-stage crushing screw rod of the right section of the double-stage screw rod;

[0016] 2), plasticization stage: the plastic part is plasticized by cooperating the second-stage precision plasticizing screw rod of the left section of the double-stage screw rod with electromagnetic induction heating, the PLC control system and the temperature control meter are used for real-time monitoring, and the process parameters are adjusted through the AI control module;

[0017] 3), extrusion molding: the plasticized plastic is extruded and molded in the form of a pull strip through the extrusion die;

[0018] 4), water bath cooling: the extruded plastic strip end is clamped by clamping auxiliary, bypasses the guide rollers on the upper and lower shelves, and is subjected to water bath cooling in the cooling tank;

[0019] 5), cutting into particles: the plastic strip is placed between the traction rollers in the traction opening by the clamping auxiliary, and cutting into particles is completed by the cutting machine.

[0020] The application provides a use method of a granulator for plastic recycling.

[0021] In use, the double-stage screw and electromagnetic induction heating are arranged to further plasticize the plastic, the PLC system is arranged to monitor and adjust process parameters in real time, so that intelligent control and automatic production are realized, the plastic melt can be uniformly plasticized, the energy consumption of the equipment is reduced, and the plasticizing efficiency is improved.

[0022] In addition, the clamping auxiliary is arranged to hold the arc-shaped handle, pull the push plate outwards, move the clamping plate by pressing the clamping plate through the clamping plate, clamp the plastic strip, pull and transfer all the extruded plastic strips, and after passing through the cooling inner assembly in the cooling tank, the plastic strips are sent to the cutting machine for cutting into particles.

[0023] In addition, the guide rollers can guide the cooling direction of the plastic strip, the contact area of the plastic strip in the cooling inner assembly can be increased after the plastic strip passes through the guide rollers in the up-down direction, the cooling efficiency is improved, and the length of the cooling tank can be shortened. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings of the embodiments will be briefly introduced below.

[0025] The drawings in the following description only relate to some embodiments of the application, and are not limited to the application.

[0026] In the drawings:

[0027] Figure 1 The structural schematic diagram of the overall structural components of the application is shown;

[0028] Figure 2 The structural schematic diagram of the cutting machine of the application is shown;

[0029] Figure 3 The structural schematic diagram of the extrusion component of the application is shown;

[0030] Figure 4 The structural schematic diagram of the base mold connecting piece of the application is shown;

[0031] Figure 5The second connecting plate of the present application and the extrusion die are shown in the expanded structure diagram;

[0032] Figure 6 The structure diagram of the clamping auxiliary of the present application is shown;

[0033] Figure 7 The structure diagram of the clamping auxiliary of the present application is shown;

[0034] Figure 8 The structure diagram of the cooling tank of the present application is shown;

[0035] Figure 9 The expanded structure diagram of the cooling inner assembly of the present application is shown. Figure 8

[0036] Figure 10 The expanded structure diagram of the cooling inner assembly of the present application is shown.

[0037] List of reference signs

[0038] 1. Control and support system; 11. Control box; 12. Support frame; 1201. Support plate;

[0039] 2. Extrusion part; 21. Heating extrusion box; 2101. Feeding port; 2102. Temperature control meter; 22. Double-stage screw; 2201. First connecting plate; 2202. Extrusion die connecting piece; 2203. Second connecting plate;

[0040] 3. Extrusion die;

[0041] 4. Cooling tank; 401. Lifting rod; 402. Clamping plate;

[0042] 5. Cooling inner assembly; 51. Upper frame; 5101. Clamping rod; 52. Lower frame; 5201. Connecting rod I;

[0043] 6. Clamping auxiliary; 61. Gripping rod; 6101. Third connecting plate; 6102. Pushing plate; 6103. Connecting rod II; 62. Clamping plate; 6201. Elastic rope; 6202. Clamping plate;

[0044] 7. Cutting machine; 701. Traction port; 7011. Traction roller; 702. Granulating port. DETAILED DESCRIPTION

[0045] ​In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without any inventive effort fall within the protection scope of the present application.

[0046] Embodiment: please refer to the attached Figure 1 to the attached Figure 10 :

[0047] The present application provides a granulator for plastic recycling and its use method, comprising: a control and support system 1, an extrusion part 2, a cooling tank 4, a clamping auxiliary 6 and a cutting machine 7; the control and support system 1 comprises a control box 11 and a support frame 12, the control box 11 is provided with a PLC controller, a control panel and an AI control module connected with the PLC controller, and the support frame 12 is installed at the rear side of the control box 11; the extrusion part 2 is installed at the top of the support frame 12, and the extrusion part 2 comprises a heating extrusion box 21 and a double-stage screw 22, the heating pipe control end in the heating extrusion box 21 is electrically connected with the PLC controller, the double-stage screw 22 is installed at the center of the heating pipe in the heating extrusion box 21, the clamping auxiliary 6 is inserted at the end of the heating extrusion box 21, and the second connecting plate 2203 is installed at the end of the double-stage screw 22 and in the heating extrusion box 21; the second connecting plate 2203 is clamped with the extrusion die 3; the cooling tank 4 is internally provided with a cooling inner assembly 5; the cooling inner assembly 5 comprises an upper frame 51 and a lower frame 52, the upper frame 51 is inserted above the lower frame 52, and the plastic strip extruded by the heating extrusion box 21 passes around the fixed shaft in the upper frame 51 and the lower frame 52; the controller of the cutting machine 7 is installed in the control box 11, the right end surface of the cutting machine 7 is provided with a traction port 701, and the traction port 701 is higher than the top surface of the cooling tank 4.

[0048] In the embodiments of the present disclosure, please refer to the contents shown in the attached Figure 1 and the attached Figure 2 , the right end surface of the cutting machine 7 is provided with the traction port 701, two groups of traction rollers 7011 are installed in the traction port 701, the upper and lower two traction rollers 7011 form a group, and the plastic strips are conveyed between each group of traction rollers 7011, the left end surface of the cutting machine 7 is additionally provided with a particle outlet 702 made of a telescopic pipe, the particle outlet 702 made of the telescopic pipe is additionally installed, the height and direction of the particle outlet 702 can be freely adjusted, different specifications of receiving containers can be conveniently used to receive plastic particles, and compared with the traditional granulator, the design of the traction device can be reduced, and the production cost is reduced.

[0049] In the embodiments of the present disclosure, please refer to the attachedFigure 8 and attached Figure 9 As shown, lifting rods 401 are installed on the front and rear sides of the right end of the cooling tank 4. An arc-shaped support plate is fixedly connected to the top of the lifting rod 401. A clamping plate 402 is provided on the top right side of the cooling tank 4. Two slots are opened on the left side of the clamping plate 402. The upper slot is horizontal and the lower slot is right angled. After the controller of the lifting rod 401 is started by the control box 11, the lifting rod 401 is raised. The lower frame 52 can be lifted by the arc-shaped support plate, which facilitates the placement of the plastic pull strip end.

[0050] In this embodiment of the disclosure, please refer to the appendix. Figure 1 and attached Figure 3 As shown, the right section of the double-stage screw 22 is a primary crushing screw, which is relatively thick and used for crushing and preliminary plasticizing of materials. The left section of the double-stage screw 22 is a secondary refining screw, with a smaller screw thread on the outer wall than the primary crushing screw, and a smaller screw pitch. Further plasticizing is achieved through electromagnetic induction heating. Simultaneously, the PLC system monitors and adjusts process parameters in real time, thereby achieving intelligent control and automated production. This also ensures uniform plasticizing of the plastic melt and reduces energy consumption by more than 30% compared to traditional equipment, while increasing plasticizing efficiency by 25% (data from the design department). (Comparison of processing efficiency after improvement) The external part of the double-stage screw 22 is equipped with a heating and plasticizing tube. The end of the heating and plasticizing tube is fixedly connected to a first connecting plate 2201. The left end face of the first connecting plate 2201 is fixedly connected to an extrusion die connector 2202 by a bolt assembly. The end of the extrusion die connector 2202 is connected to a second connecting plate 2203 by a thread. The inner chamber of the extrusion die connector 2202 has a structure with a circular cross section on the right and a rectangular cross section on the left, so that the plasticized plastic can be extruded in a rectangular cross section, which can better cooperate with the extrusion die 3 for strip extrusion molding.

[0051] In this embodiment of the disclosure, please refer to the appendix. Figure 5 As shown, the right end face of the extrusion die 3 has a protruding rectangular frame on its outer edge. The rectangular frame is snapped into the inside of the extrusion die connector 2202, and the right end face of the extrusion die 3 is flush with the left end face of the extrusion die connector 2202. Through the customized design of the extrusion die connector 2202, the port of the extrusion die 3 can be aligned during extrusion to perform plastic strip extrusion molding, thereby reducing the pressure load on the extrusion die 3. In addition, the detachable design of the extrusion die 3 makes it easy to replace it with plastic strip extrusion molding of different diameters, improving the applicability of the pellet mill.

[0052] In this embodiment of the disclosure, please refer to the appendix. Figure 2 Appendix Figure 8 and attached Figure 10As shown in the drawings, the upper frame 51 and the lower frame 52 are higher than the cooling tank 4, the right side of the outer side of the upper frame 51 is fixedly welded with a clamping rod 5101 at the front and rear ends, the right side of the outer side of the lower frame 52 is fixedly welded with a connecting rod 5201 at the front and rear ends, the connecting rod 5201 is clamped on the arc-shaped supporting plate at the top end of the lifting rod 401, the bottom surface of the upper frame 51 is fixedly connected with a plug-in plate, the plug-in plate is plugged into the rectangular groove on the top surface of the lower frame 52, the bottom of the upper frame 51 is staggered with arc-shaped protruding plates and arc-shaped recesses, the top of the lower frame 52 is staggered with arc-shaped protruding plates and arc-shaped recesses, the arc-shaped protruding plates of the upper frame 51 are clamped with the arc-shaped recesses of the lower frame 52, the arc-shaped protruding plates are rotatably clamped with guide rollers through shafts, the guide rollers can guide the cooling direction of the plastic pull strip, the contact area of the plastic pull strip in the cooling inner assembly 5 is increased after passing the guide rollers in the up-down direction, and the cooling efficiency is improved.

[0053] In the embodiments of the present disclosure, please refer to the accompanying Figure 1 and the accompanying Figure 2 As shown in the drawings, the right top of the heating extrusion box 21 is provided with a feeding port 2101, the feeding port 2101 is installed directly below the discharge port of the extruder, the top of the heating extrusion box 21 and the left side of the feeding port 2101 are installed with a temperature control meter 2102, the temperature control meter 2102 can finely control the temperature inside the heating extrusion box 21, ensure the plasticizing degree, and the feeding port 2101 can make the plastic viscous fluid extruded by the extruder directly fall into the heating extrusion box 21 to be plasticized and then extruded.

[0054] In the embodiments of the present disclosure, please refer to the accompanying Figure 6 and the accompanying Figure 7As shown, the clamping auxiliary 6 comprises a handle 61 and a clamping plate 62, the handle 61 is provided with two, and the opposite ends of the two handles 61 are fixedly connected with baffles, the opposite ends of the handle 61 are fixedly connected with third connecting plates 6101, the opposite surfaces of the two third connecting plates 6101 are provided with vertical T-shaped slide rails, the inside of the third connecting plate 6101 is provided with a through hole, and the two third connecting plates 6101 are fixedly connected with a connecting rod two 6103, the handle 61 is sleeved with a push plate 6102, the top end of the push plate 6102 is provided with an arc-shaped handle, the two ends of the clamping plate 62 are clamped on the T-shaped slide rail, the outside of the clamping plate 62 is provided with a clamping plate 6202, the inside of the clamping plate 6202 is fixedly connected with a elastic rope 6201, the elastic rope 6201 is fixedly connected to the push plate 6102 after penetrating through the third connecting plate 6101, after holding the arc-shaped handle and pulling the push plate 6102 to move outward, the elastic rope 6201 is pulled to move outward and the included angle between the upper and lower sides of the elastic rope 6201 becomes smaller, at the same time, the clamping plate 62 is pulled to move outward, the included angle between the upper and lower sides of the elastic rope 6201 becomes smaller, at the same time, the clamping plate 6202 is pressed by the clamping plate 62 to move to the middle, so that the plastic pull strip is clamped, so as to pull and transfer all the extruded plastic pull strips, after passing through the cooling inner assembly 5 in the cooling tank 4, the plastic pull strips are sent to the cutting machine 7 for cutting into particles.

[0055] In the embodiments of the present disclosure, please refer to the accompanying Figure 1 As shown, the right end top surface of the support frame 12 is fixedly connected with a support plate 1201, the top of the support plate 1201 is provided with a driving motor, the driving shaft of the driving motor is coaxially connected with a gearbox, and the output shaft of the gearbox is coaxially connected to the double-stage screw 22; the double-stage screw 22 is rotationally driven by the driving motor; the PLC controller and the AI control module of the control box 11 can be used to realize intelligent control and automatic production of the assembly line, thereby reducing labor cost.

[0056] The application discloses a kind of for plastic recycling granulator's use method, comprising the following steps:

[0057] 1), preliminary plasticization: the plastic viscous fluid of extruder is put into feed inlet 2101, and the material is crushed and preliminary plasticized by the first-stage crushing screw of double-stage screw 22 right section;

[0058] 2), plasticizing stage: by the second-stage precision plasticizing screw of double-stage screw 22 left section and electromagnetic induction heating cooperation, plastic parts are plasticized, while using PLC control system and temperature control meter 2102 for real-time monitoring, and adjusting process parameters through AI control module;

[0059] 3), extrusion molding: the plasticized plastic is extruded in the form of pull strip by extrusion die 3;

[0060] 4), water bath cooling: the extruded plastic strip end is clamped by clamping auxiliary 6, bypasses the guide rollers on the upper frame 51 and lower frame 52, and is water bath cooled in the cooling tank 4;

[0061] 5), cutting into particles: the plastic strip is placed between the traction rollers 7011 in the traction opening 701 by clamping auxiliary 6, and cutting into particles is completed by the cutting machine 7.

[0062] The working principle of the embodiment is as follows: first, according to the position of the discharge port of the extruder, the control box 11 and the support frame 12 are installed to the appropriate position, the extrusion die 3 is installed to the extrusion die connecting piece 2202, the extrusion die connecting piece 2202 is connected to the first connecting plate 2201 by screw connection, and the parameters are controlled by the PLC controller and the AI control module in the control box 11, then the lifting rod 401 is started to lift the lower frame 52 upward, the connecting rod one 5201 is clamped to the straight-angle lower groove on the left side of the clamping plate 402, and the upper frame 51 can be clamped to the horizontal upper groove on the left side of the clamping plate 402, the lower frame 52 is pushed to clamp the connecting rod one 5201 to the lowest part of the straight-angle lower groove, at this time, the upper frame 51 and the lower frame 52 are unfolded, after the plastic is formed and extruded, the end of the plastic strip is clamped and moved by the clamping auxiliary 6, is sent into the cooling tank 4, bypasses the guide rollers on the upper frame 51 and the lower frame 52, and finally is sent between the traction rollers 7011, cutting into particles is completed by the cutting machine 7, and the particles are discharged through the particle discharge opening 702.

Claims

1. A granulator for plastic recycling, characterized in that, The right end top surface of the support frame (12) is fixedly connected with a support plate (1201), a driving motor is installed on the top of the support plate (1201), a driving shaft of the driving motor is coaxially connected with a gearbox, and an output shaft of the gearbox is coaxially connected to a double-stage screw rod (22). Control and support system (1), extrusion parts (2), cooling tank (4), clamping auxiliary (6) and cutting machine (7); the control and support system (1) includes control box (11) and support frame (12), the control box (11) is provided with PLC controller, operation panel and AI control module connected with the circuit thereof, the support frame (12) is installed on the back side of the control box (11); the extrusion part (2) is installed on the top of the support frame (12), the extrusion part (2) includes heating extrusion box (21) and double-stage screw (22), the heating pipe control end in the heating extrusion box (21) is electrically connected with the PLC controller, the double-stage screw (22) is installed in the central heating pipe of the heating extrusion box (21), and the end of the heating extrusion box (21) is inserted with the clamping auxiliary (6), the second connecting plate (2203) is installed at the end of the double-stage screw (22) and in the heating extrusion box (21); the extrusion die (3) is clamped in the second connecting plate (2203); the cooling tank (4) is provided with cooling inner assembly (5), the right end of the cooling tank (4) is provided with lifting rod (401) on the left and right sides, the top end of the lifting rod (401) is fixedly connected with arc-shaped supporting plate, and the right top surface of the cooling tank (4) is provided with clamping plate (402), the left side of the clamping plate (402) is provided with two grooves, the upper groove is horizontal, and the lower groove is right angle; the cooling inner assembly (5) includes upper frame (51) and lower frame (52), the upper frame (51) is inserted above the lower frame (52), the height of the upper frame (51) and the lower frame (52) is lower than the cooling tank (4), the front and rear ends of the right side of the outer portion of the upper frame (51) are fixedly welded with clamping rod (5101), the front and rear ends of the right side of the outer portion of the lower frame (52) are fixedly welded with connecting rod one (5201), the connecting rod one (5201) is clamped on the arc-shaped supporting plate at the top end of the lifting rod (401), the bottom surface of the upper frame (51) is fixedly connected with plug-in plate, the plug-in plate is inserted into the rectangular groove on the top surface of the lower frame (52), the bottom of the upper frame (51) is staggeredly provided with arc-shaped convex plate and arc-shaped groove, the top of the lower frame (52) is staggeredly provided with arc-shaped convex plate and arc-shaped groove, and the arc-shaped convex plate of the upper frame (51) and the arc-shaped groove of the lower frame (52) are clamped with each other, the guide roller is rotatably clamped on the arc-shaped convex plate through shaft, and the plastic strip extruded by the heating extrusion box (21) passes around the fixed shaft in the inner portion of the upper frame (51) and the lower frame (52).The clamping auxiliary piece (6) comprises a handle (61) and a clamping plate (62), the handle (61) is provided with two, the two handles (61) are fixedly connected with a baffle at opposite ends, the opposite ends of the handle (61) are fixedly connected with a third connecting plate (6101), the opposite surfaces of the two third connecting plates (6101) are provided with vertical T-shaped slide rails, the inside of the third connecting plate (6101) is provided with a through hole, the two third connecting plates (6101) are fixedly connected with a connecting rod two (6103), the handle (61) is sleeved with a push plate (6102), the top end of the push plate (6102) is provided with an arc-shaped handle, the two ends of the clamping plate (62) are clamped on the T-shaped slide rail, the outside of the clamping plate (62) is provided with a clamping plate (6202), the inside of the clamping plate (6202) is fixedly connected with an elastic rope (6201), the elastic rope (6201) is fixedly connected to the push plate (6102) after penetrating through the third connecting plate (6101); the controller of the cutting machine (7) is installed in the control box (11), the right end surface of the cutting machine (7) is provided with a traction port (701), the traction port (701) is higher than the top surface height of the cooling tank (4).

2. A granulator for plastic recycling according to claim 1, characterized in that, A feeding port (2101) is arranged at the right top of the heating extrusion box (21), the feeding port (2101) is installed directly below the discharge port of the extruder, and a temperature control meter (2102) is installed on the top of the heating extrusion box (21) and the left side of the feeding port (2101).

3. A granulator for plastic recycling according to claim 1, characterized in that, The right section of the double-stage screw rod (22) is a primary crushing screw rod, the left section of the double-stage screw rod (22) is a secondary precision molding screw rod, the screw flight of the outer wall of the screw rod is smaller than that of the primary crushing screw rod, the pitch of the secondary precision molding screw rod is smaller than that of the primary crushing screw rod, a heating plasticizing pipe is arranged outside the double-stage screw rod (22), the end of the heating plasticizing pipe is fixedly connected with a first connecting plate (2201), the left end surface of the first connecting plate (2201) is fixedly connected with an extrusion die connecting piece (2202) through a bolt assembly, and the end of the extrusion die connecting piece (2202) is threadedly connected with a second connecting plate (2203).

4. A granulator for plastic recycling according to claim 2, wherein, A protruding rectangular frame is arranged on the right end surface of the extrusion die (3), the rectangular frame is clamped in the extrusion die connecting piece (2202), and the right end surface of the extrusion die (3) is flush with the left end surface of the extrusion die connecting piece (2202).

5. A granulator for plastic recycling according to claim 4, characterized in that, A traction port (701) is arranged on the right end surface of the cutting machine (7), two groups of traction rollers (7011) are installed in the traction port (701), the upper and lower two traction rollers (7011) form a group, and the plastic strips are conveyed between each group of traction rollers (7011), and a particle outlet (702) made of an extension tube is additionally arranged on the left end surface of the cutting machine (7).

6. A granulator for plastic recycling according to claim 1, characterized in that, The method comprises the following steps:

7. A method of using a granulator for plastic recycling according to any one of claims 1-6, characterized in that, 1) preliminary plasticizing: the plastic viscous fluid of the extruder is put into the feeding port (2101), and the material is crushed and preliminarily plasticized by the primary crushing screw rod of the right section of the double-stage screw rod (22); 2) plasticizing stage: the plastic part is plasticized by the secondary precision molding screw rod of the left section of the double-stage screw rod (22) in cooperation with electromagnetic induction heating, the PLC control system and the temperature control meter (2102) are used for real-time monitoring, and the process parameters are adjusted by the AI control module; 3) extrusion molding: the plasticized plastic is extruded and molded in the form of a strip by the extrusion die (3); 4) water bath cooling: the end of the extruded plastic strip is clamped by the clamping auxiliary part (6), passes through the guide rollers on the upper frame (51) and the lower frame (52), and is subjected to water bath cooling in the cooling tank (4); 5) cutting and granulating: the plastic strip is placed between the traction rollers (7011) in the traction port (701) by the clamping auxiliary part (6), and cutting and granulating are completed by the cutting machine (7). ​

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