Waste plastic crushing and sorting device and automatic metal impurity removing method

Abstract

The invention relates to the technical field of plastic recycling, in particular to a waste plastic crushing and sorting device and an automatic metal impurity rejecting method.The waste plastic crushing and sorting device comprises a rack, a primary separation assembly and a two-part assembly, and the primary separation assembly comprises a crushing mechanism arranged on the rack, a flattening mechanism arranged on the crushing mechanism and a conveying and sorting mechanism arranged on a sorting mounting box; the two-part assembly comprises a crushing mechanism arranged on the sorting mounting box and a vibration screening mechanism arranged on the rack and located below the crushing mechanism, through the arrangement of the crushing mechanism and the conveying sorting mechanism, metal is adsorbed to a conveying belt after waste plastic is crushed, and through the arrangement of a power supply component, when a conductive rod slides to an insulating rod, the metal is separated from the insulating rod; the metal automatically falls into the crushing mechanism, plastic remaining on the metal is further crushed, the plastic and the metal are separated more thoroughly, plastic crushing and metal separation are conducted synchronously, the plastic crushing and separating efficiency is improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of plastic recycling, in particular to a waste plastic crushing and sorting device and a method for automatically removing metal impurities. Background Art

[0002] Waste plastic recycling refers to the process of collecting, sorting, cleaning and reprocessing used plastic items, aiming to transform these wastes into new resources. With the increase in global plastic use, the amount of waste plastics generated is also increasing. Recycling has become an urgent environmental protection measure, so waste plastics need to be crushed, but waste plastics contain metal parts, so the metal needs to be separated.

[0003] The publication number CN219748648U provides a waste plastic crusher that is convenient for removing metal impurities, including a box body and a rectangular frame, wherein the interior of the box body is sequentially provided with crushing parts, a fixed block and an adjustment component from top to bottom, wherein the rectangular frame is provided below the fixed block, and an adsorption component is provided inside the rectangular frame, wherein the adsorption component includes a rectangular magnet and a frame magnet, and the interior of the rectangular magnet is fixedly connected with the frame magnet. The waste plastic crusher that is convenient for removing metal impurities, through the rectangular frame and the adsorption component, is conducive to the device being able to more conveniently remove metal impurities from the crushed waste plastics, and this operation mode is more convenient, shortens the operation time, and improves the work efficiency of the operator, and the adjustment component, the threaded long rod and the fixed block are conducive to the operator being able to disassemble and assemble the rectangular frame more labor-savingly, and is also convenient for installing rectangular frames and adsorption components of different models.

[0004] However, when the above-mentioned waste plastic crusher that is easy to remove metal impurities is in use, the metal impurities are adsorbed on the adsorption component and cannot be removed. The user needs to stop the entire device to replace the adsorption device and remove the metal impurities thereon. At this time, the crusher needs to be shut down, which reduces the working efficiency of the crusher and increases the labor intensity of the workers. Summary of the invention

[0005] The purpose of the present invention is to provide a waste plastic crushing and sorting device and a method for automatically removing metal impurities to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: Waste plastic crushing and sorting device, including: A frame, wherein a sorting installation box is provided on the frame; A primary separation component, the primary separation component includes a crushing mechanism arranged on the frame, a flattening mechanism arranged on the crushing mechanism, and a conveying and sorting mechanism, the conveying and sorting mechanism includes a conveyor belt arranged on the sorting installation box, an electromagnet arranged on the conveyor belt, and a power supply component, the power supply mechanism includes a power supply ring arranged at the center of the conveyor belt, a power supply sliding rod and an insulating rod arranged on the power supply ring, and a power supply fork arranged on the conveyor belt; The two-component assembly comprises a crushing mechanism arranged on the sorting installation box and a vibrating screen mechanism arranged on the frame. The crushing mechanism is used to crush the waste plastics. The flattening mechanism drives the crushing mechanism to move so that the crushed waste plastics are evenly scattered on the conveyor belt and are moved by the flattening mechanism. The power supply fork slides in contact with the power supply slide bar so that the power supply slide bar supplies power to the electromagnet so that the electromagnet absorbs the metal on the conveyor belt. The crushed plastic moves with the conveyor belt and falls from the end of the conveyor belt. When the power supply fork moves with the conveyor belt to the insulating rod, the electromagnet is powered off so that the metal falls into the crushing mechanism. The residual plastic on the metal is hit and crushed and then falls into the vibrating screen mechanism for secondary separation.

[0007] Preferably, the conveying and sorting mechanism also includes a transmission motor arranged on the frame and connected to the conveyor belt, the power supply component also includes a bracket arranged on the sorting installation box and connected to the power supply ring, a power supply groove opened on the power supply ring, a sleeve arranged on the power supply fork, a movable wheel arranged on the sleeve and located in the power supply groove, a conductive rod inserted in the sleeve, and a compression spring sleeved on the conductive rod, the power supply slide rod is arranged in the power supply groove, the insulating rod is arranged in the power supply groove and connected to the power supply slide rod, the compression spring presses the conductive rod tightly against the power supply slide rod, so that the power supply slide rod supplies power to the electromagnet, and when the conductive rod moves to contact the insulating rod, the electromagnet is de-energized.

[0008] Preferably, the crushing mechanism includes a crushing box with upper and lower openings, crushing rollers symmetrically inserted on the crushing box, crushing toothed disks staggered on the crushing rollers, a crushing motor arranged on the crushing box and connected to the crushing rollers, and transmission gears arranged on the crushing rollers and meshing with each other. The crushing motor is used to drive the two crushing rollers to rotate towards each other, so that the crushing toothed disks driven by the crushing rollers rotate towards each other, and the waste plastic poured into the crushing toothed disks is crushed.

[0009] Preferably, the flattening mechanism includes a linear module arranged on the frame and connected to the crushing box, a push-link rod arranged on the crushing box, a roller shaft arranged on the push-link rod, a lever arranged on the roller shaft, a displacement rod arranged on the wall of the crushing box, a flattening groove opened on the frame, and a flattening wheel arranged on the displacement rod and clamped in the flattening groove.

[0010] Preferably, the linear module is used to drive the crushing box to move back and forth along the flattening groove, so that the crushed plastic falls evenly on the conveyor belt, and at the same time drives the roller to move, so that the roller rotates, and the lever moves the crushed plastic on the conveyor belt, so that the metal in the crushed plastic can be attracted by the electromagnet.

[0011] Preferably, the pulverizing mechanism comprises a pulverizing cylinder arranged on the sorting installation box, a material receiving port and a material discharging port arranged on the pulverizing cylinder, and a striking component symmetrically arranged on the sorting installation box.

[0012] Preferably, the striking component includes a pulverizing motor arranged on the sorting installation box, a pulverizing disk arranged on the pulverizing motor and located in the pulverizing cylinder, and pulverizing rods arranged on the pulverizing disk, and the pulverizing rods on the two pulverizing disks are staggered.

[0013] Preferably, the vibrating screening mechanism includes a vibrating screening box arranged on the frame, a sieve plate arranged obliquely in the vibrating screening box, a vibrator arranged on the vibrating screening box, a metal outlet and a plastic particle outlet opened on the wall of the vibrating screening box and respectively located above and below the sieve plate, a door panel arranged at the discharge port, and a telescopic rod with one end arranged on the door panel and the other end arranged on the vibrating screening box.

[0014] Preferably, when the conductive rod follows the conveyor belt to move to the insulating rod, the electromagnet is de-energized, causing the metal to fall into the crushing box from the receiving port, the crushing motor drives the crushing rod to rotate, breaking up the plastic remaining on the metal, the telescopic rod contracts and drives the door panel to rotate, causing metal and plastic particles to fall onto the screen plate, the vibrator drives the vibrating screen box to vibrate, causing the plastic particles to pass through the screen plate, and allowing the metal to be discharged from the metal outlet.

[0015] A method for automatically removing metal impurities from a waste plastic crushing and sorting device based on any one of the above, comprising: S1: Pour the waste plastic into the crushing box, start the crushing motor to drive the two crushing rollers to rotate towards each other, so that the crushing rollers drive the crushing toothed discs to rotate towards each other, and the waste plastic poured into the crushing toothed discs is crushed; S2: Start the linear module to drive the crushing box to move back and forth along the flattening groove, so that the crushed plastic falls evenly on the conveyor belt, and at the same time drive the roller to move, so that the roller rotates, and the lever moves the crushed plastic on the conveyor belt; S3: The compression spring presses the conductive rod tightly against the power supply slide rod, so that the power supply slide rod supplies power to the electromagnet, so that the electromagnet attracts the metal on the conveyor belt, and the crushed plastic moves with the conveyor belt, so that the crushed plastic falls from the end of the conveyor belt; S4: When the conductive rod follows the conveyor belt to move to the insulating rod, the electromagnet is de-energized, causing the metal to fall into the crushing box from the receiving port, and the crushing motor drives the crushing rod to rotate to break the plastic remaining on the metal. The telescopic rod contracts to drive the door panel to rotate, causing metal and plastic particles to fall onto the screen plate, and the vibrator drives the vibrating screen box to vibrate, causing the plastic particles to pass through the screen plate, allowing the metal to be discharged from the metal outlet.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention crushes the waste plastics and adsorbs the metal on the conveyor belt through the arrangement of the crushing mechanism and the conveying and sorting mechanism. Through the arrangement of the power supply component, when the conductive rod slides to the insulating rod, the metal automatically falls into the crushing mechanism, and the plastic remaining on the metal is further crushed, so that the separation of the plastic and the metal is more thorough, and the crushing of the plastic and the separation of the metal are carried out synchronously, so that the crushing and sorting work can be carried out continuously, the efficiency of the crushing and separation of the plastic is improved, and the labor intensity of the workers is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the positive structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention after the frame is hidden; Figure 4 It is a structural schematic diagram of the crushing mechanism and the flattening mechanism of the present invention; Figure 5 It is a structural schematic diagram of the conveyor belt of the present invention; Figure 6 It is a structural schematic diagram of the power supply component of the present invention; Figure 7 for Figure 6 A schematic diagram of the enlarged structure of region A; Figure 8 It is a schematic structural diagram of the power supply fork of the present invention; Fig. 9 It is a schematic diagram of the structure of the two-component assembly of the present invention; Fig.10 It is a bottom view structural schematic diagram of the two-component assembly of the present invention.

[0018] In the figure: 1. frame; 2. sorting installation box; 3. conveyor belt; 4. transmission motor; 5. electromagnet; 6. bracket; 7. power supply ring; 8. power supply slot; 9. power supply slide bar; 10. insulating rod; 11. power supply fork; 12. sleeve; 13. moving wheel; 14. conductive rod; 15. compression spring; 16. crushing box; 17. crushing roller; 18. crushing toothed disc; 19. crushing motor; 20. transmission gear; 21. linear module; 22. push rod; 23. roller shaft; 24. lever; 25. displacement rod; 26. flattening slot; 27. flattening wheel; 28. crushing cylinder; 29. ​​material receiving port; 30. material discharging port; 31. crushing motor; 32. crushing disc; 33. crushing rod; 34. vibrating screen box; 35. sieve plate; 36. vibrator; 37. metal outlet; 38. plastic particle outlet; 39. door panel; 40. telescopic rod. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figures 1 to 10 , the present invention provides a technical solution: Waste plastic crushing and sorting device, including: The frame 1 is provided with a sorting installation box 2, and the sorting installation box 2 is fixedly connected to the frame 1 by means of bolts or welding.

[0021] The primary subassembly includes a crushing mechanism arranged on the frame 1, a flattening mechanism arranged on the crushing mechanism, and a conveying and sorting mechanism arranged on the sorting installation box 2. The crushing mechanism includes a crushing box 16, a crushing roller 17, a crushing toothed disc 18, a crushing motor 19 and a transmission gear 20. The crushing box 16 has upper and lower openings, so that the worn-out plastic is fed into the crushing box 16 from the opening above the crushing box 16, and the crushed plastic is discharged from the opening below the crushing box 16. The crushing rollers 17 are symmetrically inserted on the crushing box 16, and the crushing rollers 17 are rotatably connected to the crushing box 16 by means of bearings, etc. The crushing toothed discs 18 are staggered on the crushing rollers 17, and the crushing toothed discs 18 are fixedly connected to the crushing rollers 17 by means of integral molding, etc. The crushing toothed discs 18 are provided with a number of The crushing motor 19 is arranged on the crushing box 16 and connected with the crushing roller 17. The crushing motor 19 is fixedly connected with the crushing box 16 by means of bolts, etc. The crushing motor 19 is rotatably connected with one of the crushing rollers 17 by means of V-belts and pulleys, etc. A transmission gear 20 is arranged on the crushing roller 17. The transmission gear 20 is fixedly connected with the crushing roller 17 by means of interference fit and flat keys, etc. The transmission gears 20 are arranged on both crushing rollers 17 and mesh with each other. The crushing motor 19 is used to drive the two crushing rollers 17 to rotate in opposite directions, so that the crushed roller 17 drives the crushing toothed disk 18 to rotate in opposite directions, and the waste plastic poured into the crushing toothed disk 18 is crushed.

[0022] The flattening mechanism includes a linear module 21, a push rod 22, a roller shaft 23, a lever 24, a displacement rod 25, a flattening groove 26 and a flattening wheel 27. The linear module 21 is arranged on the frame 1 and connected to the crushing box 16. The linear module 21 is fixedly connected to the frame 1 by setting bolts or the like. The linear module 21 is fixedly connected to the crushing box 16 by setting bolts or the like. The push rod 22 is arranged on the crushing box 16. The push rod 22 is fixedly connected to the crushing box 16 by setting bolts or welding or the like. The roller shaft 23 is arranged on the push rod 22. The roller shaft 23 is rotatably connected to the push rod 22 by setting bearings or the like. The lever 24 is arranged on the roller shaft 23. The lever 24 is fixedly connected to the roller shaft 23 by setting bolts or welding or the like. The displacement rod 25 is arranged on the wall of the crushing box 16, the displacement rod 25 is fixedly connected to the inner wall of the crushing box 16 by welding or the like, the flattening groove 26 is opened on the frame 1, the flattening wheel 27 is arranged on the displacement rod 25 and is clamped in the flattening groove 26, the flattening wheel 27 is rotatably connected to the displacement rod 25 by setting a bearing or the like, the flattening wheel 27 is in the shape of an "I", the flattening wheel 27 is clamped in the flattening groove 26 to prevent the flattening wheel 27 from being separated from the flattening groove 26, the linear module 21 is used to drive the crushing box 16 to move back and forth along the flattening groove 26, so that the crushed plastic falls evenly on the conveyor belt 3, and at the same time drives the roller shaft 23 to move, so that the roller shaft 23 rotates, so that the lever 24 moves the crushed plastic on the conveyor belt 3, so that the metal in the crushed plastic can be attracted by the electromagnet 5.

[0023] The conveying and sorting mechanism includes a conveyor belt 3, a transmission motor 4, an electromagnet 5, and a power supply component. The power supply component includes a bracket 6, a power supply ring 7, a power supply slot 8, a power supply slide bar 9, an insulating rod 10, a power supply fork 11, a sleeve 12, a moving wheel 13, a conductive rod 14, and a compression spring 15. The conveyor belt 3 is arranged on the sorting installation box 2. The rotating shaft of the conveyor belt 3 is fixedly connected to the sorting installation box 2 by means of bearings, etc. The transmission motor 4 is arranged on the frame 1 and connected to the conveyor belt 3. The transmission motor 4 is fixedly connected to the frame 1 by means of bolts or welding, etc. The transmission motor 4 is rotatably connected to the rotating shaft of the conveyor belt 3 by means of V-belts and pulleys, etc. The electromagnet The electromagnet 5 is arranged on the conveyor belt 3, the electromagnet 5 is embedded in the belt surface of the conveyor belt 3, the bracket 6 is arranged on the sorting installation box 2, the bracket 6 is fixedly connected to the sorting installation box 2 by setting bolts, etc., the power supply ring 7 is arranged on the bracket 6, the power supply ring 7 is fixedly connected to the bracket 6 by setting bolts, etc., the power supply ring 7 is arranged at the center of the movement of the conveyor belt 3, the power supply groove 8 is opened on the power supply ring 7, the power supply slide rod 9 is arranged in the power supply groove 8, the power supply slide rod 9 is fixedly connected to the inner wall of the power supply groove 8 by setting insulating bolts, etc., the shape of the power supply slide rod 9 is consistent with the shape of the power supply slide groove, and the power supply slide rod 9 is provided with an opening, and the insulating rod 10 is arranged in the power supply groove 8 and The insulating rod 10 is connected to the power supply slide 9, and the insulating rod 10 is fixedly connected to the inner wall of the power supply slot 8 by setting an insulating bolt or the like. The insulating rod 10 is located at the opening of the power supply slide 9. The power supply fork 11 is set on the conveyor belt 3, and the power supply fork 11 is fixedly connected to the back of the conveyor belt 3 by setting bolts or the like. The sleeve 12 is set on the power supply fork 11, and the sleeve 12 is fixedly connected to the power supply fork 11 by welding or the like. The moving wheel 13 is set on the sleeve 12 and is located in the power supply slot 8. The moving wheel 13 is rotatably connected to the sleeve 12 by setting a bearing or the like. The moving wheel 13 is movably connected to the power supply slot 8. The conductive rod 14 is inserted in the sleeve 12, and the conductive rod 14 is connected to the sleeve 12. Mobile connection, the conductive rod 14 is provided with an electric wire which can be electrically connected to the electromagnet 5, and the compression spring 15 is sleeved on the conductive rod 14, one end of the compression spring 15 is fixedly connected to the conductive rod 14 by setting a clamp, and the other end of the compression spring 15 is fixedly connected to the sleeve 12 by setting a clamp, and the compression spring 15 presses the conductive rod 14 tightly against the power supply slide 9, so that the power supply slide 9 supplies power to the electromagnet 5, so that the electromagnet 5 absorbs the metal on the conveyor belt 3, and the transmission motor 4 drives the conveyor belt 3 to rotate, so that the crushed plastic moves with the conveyor belt 3, and the crushed plastic falls from the end of the conveyor belt 3, and the metal moves to the bottom surface of the conveyor belt 3 following the electromagnet 5.

[0024] The two subassemblies include a crushing mechanism arranged on the sorting installation box 2, a vibrating screening mechanism arranged on the frame 1 and located below the crushing mechanism, the crushing mechanism includes a crushing barrel 28, a material receiving port 29, a material discharging port 30 and a striking component symmetrically arranged on the sorting installation box 2, the striking component includes a crushing motor 31, a crushing disc 32 and a crushing rod 33, the crushing barrel 28 is arranged on the sorting installation box 2, the crushing barrel 28 is fixedly connected to the inner wall of the sorting installation box 2 by welding or the like, the material receiving port 29 and the material discharging port 30 are arranged on the crushing barrel 28, the crushing motor 31 is arranged on the sorting installation box 2, the crushing motor 31 is fixedly connected to the sorting installation box 2 by setting bolts or the like, the crushing disc 32 is arranged on the crushing motor 31 and is located in the crushing barrel 28, the crushing disc 32 is fixedly connected to the crushing barrel 28 by setting bolts or the like, the crushing rod 33 is arranged on the crushing disc 32, and is fixedly connected to the crushing disc 32 by welding or the like, and the crushing rods 33 on the two crushing discs 32 are staggered.

[0025] The vibrating screen mechanism includes a vibrating screen box 34, a sieve plate 35, a vibrator 36, a metal outlet 37, a plastic particle outlet 38, a door panel 39 and a telescopic rod 40. The vibrating screen box 34 is arranged on the frame 1, and the vibrating screen box 34 is fixedly connected to the frame 1 by setting bolts or the like. The sieve plate 35 is tiltedly arranged in the vibrating screen box 34. The sieve plate 35 is a flat plate with small holes. The sieve plate 35 is fixedly connected to the vibrating screen box 34 by welding or the like. The vibrator 36 is arranged on the vibrating screen box 34, and the vibrator 36 is fixedly connected to the vibrating screen box 34 by setting bolts or the like. The metal outlet 37 and the plastic particle outlet 38 are opened on the wall of the vibrating screen box 34 and are respectively located above and below the sieve plate 35. The door panel 39 is arranged at the discharge port 30. The door panel 39 The telescopic rod 40 is rotatably connected to the pulverizing barrel 28 by setting a hinge, one end of the telescopic rod 40 is set on the door panel 39 and the other end is set on the vibrating screen box 34, one end of the telescopic rod 40 is rotatably connected to the door panel 39 by setting a rotating pin, and the other end of the telescopic rod 40 is rotatably connected to the vibrating box by setting a rotating pin. When the conductive rod 14 follows the conveyor belt 3 to move to the insulating rod 10, the electromagnet 5 is powered off, so that the metal falls into the pulverizing box from the material receiving port 29, and the pulverizing motor 31 drives the pulverizing rod 33 to rotate to break the plastic remaining on the metal. The telescopic rod 40 contracts and drives the door panel 39 to rotate, so that the metal and plastic particles fall on the screen plate 35, and the vibrator 36 drives the vibrating screen box 34 to vibrate, so that the plastic particles pass through the screen plate 35, and the metal is discharged from the metal outlet 37.

[0026] Working principle: When in use, the waste plastic is poured into the crushing box 16, the crushing motor 19 is started to drive the two crushing rollers 17 to rotate in opposite directions, so that the crushed rollers 17 drive the crushing toothed disc 18 to rotate in opposite directions, and the waste plastic poured into the crushing toothed disc 18 is crushed, and the linear module 21 is started to drive the crushing box 16 to move back and forth along the flattening groove 26, so that the crushed plastic falls evenly on the conveyor belt 3, and at the same time drives the roller shaft 23 to move, so that the roller shaft 23 rotates, so that the lever 24 moves the crushed plastic on the conveyor belt 3, and the compression spring 15 presses the conductive rod 14 tightly against the power supply slide bar 9, so that the power supply slide bar 9 moves toward the electromagnet 5 Power is supplied to make the electromagnet 5 attract the metal on the conveyor belt 3, and the crushed plastic moves with the conveyor belt 3, so that the crushed plastic falls from the end of the conveyor belt 3. When the conductive rod 14 moves with the conveyor belt 3 to the insulating rod 10, the electromagnet 5 is de-energized, so that the metal falls into the crushing box from the receiving port 29. The crushing motor 31 drives the crushing rod 33 to rotate, and the plastic remaining on the metal is crushed. The telescopic rod 40 contracts and drives the door panel 39 to rotate, so that the metal and plastic particles fall on the sieve plate 35. The vibrator 36 drives the vibrating sieve box 34 to vibrate, so that the plastic particles pass through the sieve plate 35, and the metal is discharged from the metal outlet 37.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Waste plastic crushing and sorting device, characterized in that: include: A frame, wherein a sorting installation box is provided on the frame; A primary separation component, the primary separation component includes a crushing mechanism arranged on the frame, a flattening mechanism arranged on the crushing mechanism, and a conveying and sorting mechanism, the conveying and sorting mechanism includes a conveyor belt arranged on the sorting installation box, an electromagnet arranged on the conveyor belt, and a power supply component, the power supply mechanism includes a power supply ring arranged at the center of the conveyor belt, a power supply sliding rod and an insulating rod arranged on the power supply ring, and a power supply fork arranged on the conveyor belt; The two-component assembly comprises a crushing mechanism arranged on the sorting installation box and a vibrating screen mechanism arranged on the frame. The crushing mechanism is used to crush the waste plastics. The flattening mechanism drives the crushing mechanism to move so that the crushed waste plastics are evenly scattered on the conveyor belt and are moved by the flattening mechanism. The power supply fork slides in contact with the power supply slide bar so that the power supply slide bar supplies power to the electromagnet so that the electromagnet absorbs the metal on the conveyor belt. The crushed plastic moves with the conveyor belt and falls from the end of the conveyor belt. When the power supply fork moves with the conveyor belt to the insulating rod, the electromagnet is powered off so that the metal falls into the crushing mechanism. The residual plastic on the metal is hit and crushed and then falls into the vibrating screen mechanism for secondary separation.

2. The waste plastic crushing and sorting device according to claim 1 is characterized in that: The conveying and sorting mechanism also includes a transmission motor arranged on the frame and connected to the conveyor belt, the power supply component also includes a bracket arranged on the sorting installation box and connected to the power supply ring, a power supply groove opened on the power supply ring, a sleeve arranged on the power supply fork, a moving wheel arranged on the sleeve and located in the power supply groove, a conductive rod inserted in the sleeve, and a compression spring sleeved on the conductive rod. The power supply slide rod is arranged in the power supply groove, the insulating rod is arranged in the power supply groove and connected to the power supply slide rod, the compression spring presses the conductive rod tightly against the power supply slide rod, so that the power supply slide rod supplies power to the electromagnet, and when the conductive rod moves to contact the insulating rod, the electromagnet is de-energized.

3. The waste plastic crushing and sorting device according to claim 2 is characterized in that: The crushing mechanism includes a crushing box with upper and lower openings, crushing rollers symmetrically inserted on the crushing box, crushing toothed disks staggered on the crushing rollers, a crushing motor arranged on the crushing box and connected to the crushing rollers, and transmission gears arranged on the crushing rollers and meshing with each other. The crushing motor is used to drive the two crushing rollers to rotate towards each other, so that the crushing toothed disks driven by the crushing rollers rotate towards each other, and the waste plastics poured into the crushing toothed disks are crushed.

4. The waste plastic crushing and sorting device according to claim 3 is characterized in that: The flattening mechanism includes a linear module arranged on the frame and connected to the crushing box, a push-link rod arranged on the crushing box, a roller shaft arranged on the push-link rod, a lever arranged on the roller shaft, a displacement rod arranged on the wall of the crushing box, a flattening groove opened on the frame, and a flattening wheel arranged on the displacement rod and clamped in the flattening groove.

5. The waste plastic crushing and sorting device according to claim 4 is characterized in that: The linear module is used to drive the crushing box to move back and forth along the flattening groove, so that the crushed plastic falls evenly on the conveyor belt, and at the same time drives the roller to move, so that the roller rotates, and the lever moves the crushed plastic on the conveyor belt, so that the metal in the crushed plastic can be attracted by the electromagnet.

6. The waste plastic crushing and sorting device according to claim 4 is characterized in that: The pulverizing mechanism comprises a pulverizing cylinder arranged on the sorting installation box, a material receiving port and a material discharging port arranged on the pulverizing cylinder, and a striking component symmetrically arranged on the sorting installation box.

7. The waste plastic crushing and sorting device according to claim 6 is characterized in that: The striking component includes a pulverizing motor arranged on the sorting installation box, a pulverizing disc arranged on the pulverizing motor and located in the pulverizing tube, and pulverizing rods arranged on the pulverizing disc, and the pulverizing rods on the two pulverizing discs are arranged alternately.

8. The waste plastic crushing and sorting device according to claim 7 is characterized in that: The vibrating screening mechanism includes a vibrating screening box arranged on the frame, a sieve plate arranged obliquely in the vibrating screening box, a vibrator arranged on the vibrating screening box, a metal outlet and a plastic particle outlet opened on the wall of the vibrating screening box and respectively located above and below the sieve plate, a door panel arranged at the discharge port, and a telescopic rod with one end arranged on the door panel and the other end arranged on the vibrating screening box.

9. The waste plastic crushing and sorting device according to claim 8, characterized in that: When the conductive rod follows the conveyor belt and moves to the insulating rod, the electromagnet is de-energized, causing the metal to fall into the crushing box from the receiving port, and the crushing motor drives the crushing rod to rotate to break the plastic remaining on the metal. The contraction of the telescopic rod drives the door panel to rotate, causing metal and plastic particles to fall onto the screen plate, and the vibrator drives the vibrating screen box to vibrate, causing the plastic particles to pass through the screen plate, and the metal to be discharged from the metal outlet.

10. A method for automatically removing metal impurities from the waste plastic crushing and sorting device according to any one of claims 1 to 9, characterized in that: include: S1: Pour the waste plastic into the crushing box, start the crushing motor to drive the two crushing rollers to rotate towards each other, so that the crushing rollers drive the crushing toothed discs to rotate towards each other, and the waste plastic poured into the crushing toothed discs is crushed; S2: Start the linear module to drive the crushing box to move back and forth along the flattening groove, so that the crushed plastic falls evenly on the conveyor belt, and at the same time drive the roller to move, so that the roller rotates, and the lever moves the crushed plastic on the conveyor belt; S3: The compression spring presses the conductive rod tightly against the power supply slide rod, so that the power supply slide rod supplies power to the electromagnet, so that the electromagnet attracts the metal on the conveyor belt, and the crushed plastic moves with the conveyor belt, so that the crushed plastic falls from the end of the conveyor belt; S4: When the conductive rod follows the conveyor belt to move to the insulating rod, the electromagnet is de-energized, causing the metal to fall into the crushing box from the receiving port, and the crushing motor drives the crushing rod to rotate to break the plastic remaining on the metal. The telescopic rod contracts to drive the door panel to rotate, causing metal and plastic particles to fall onto the screen plate, and the vibrator drives the vibrating screen box to vibrate, causing the plastic particles to pass through the screen plate, allowing the metal to be discharged from the metal outlet.

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