A multi-impurity separation device for pet bottle flake recycling material and a method of using the same

Abstract

The application discloses a kind of multiple impurities separation device for PET bottle chip recycled material and its use method, including material guiding transmission mechanism, the material guiding transmission mechanism includes stable bottom plate, the top of the stable bottom plate is fixedly connected with transmission concave frame by fixed plate, the both sides of the front part of transmission concave frame inner cavity are rotatably connected with first rotating rod by bearing piece, and the application relates to bottle chip recycling technical field.The multiple impurities separation device for PET bottle chip recycled material and its use method, by the combination of material guiding transmission mechanism and material conveying sorting mechanism, the setting of the two mechanisms can drive the second conveyor belt, polyester fiber cloth and transmission mesh belt to rotate by motor, and the static electricity generated by friction can be used to adsorb bottle material on the surface of transmission mesh belt to reinforce, and then the repulsive force generated by magnetic roller can be used to sort aluminum sheet, and subsequent cooperation between structures can drive the second conveyor belt and polyester fiber cloth to separate from transmission mesh belt.

Description

Technical Field

[0001] This invention relates to the field of PET bottle flake recycling technology, specifically to a device for separating multiple impurities from recycled PET bottle flakes and its usage method. Background Technology

[0002] Bottle-grade PET, as an environmentally friendly high-molecular polyester material, stands out among many packaging materials. Bottle-grade PET is safe and harmless, and has advantages such as high transparency and lightweight for easy transportation. It is widely used in packaging, food and beverage and other fields. In the chemical fiber industry, a large part of the raw materials are recycled PET bottle flakes. This is because many bottles are collected with labels attached. If impurities are not separated, it will lead to difficulties in subsequent processing. Patent documents have now made improvements to this.

[0003] For example, Chinese patent CN204322351U discloses an automatic separation production device for various impurities in recycled PET bottle flakes. This device includes a feeding auger, a PET / PS / PE separation device, a first centrifuge, a PET material auger, a first lifting auger, a first high-speed dewatering machine, a second lifting auger, a PS / PE separation device, a second high-speed dewatering machine, a PS discharge auger, a third lifting auger, a second centrifuge, and a fourth lifting auger. This invention achieves automated separation and cleaning, ensuring the uniformity of the materials and preventing mixing, thus simplifying and facilitating subsequent processing.

[0004] While the equipment described in the above document can automatically separate impurities such as labels and provides subsequent cleaning functions, it still has significant shortcomings in actual use:

[0005] When recycling PET bottle flakes, although most impurities are labels or bottle caps, aluminum flakes may also be mixed in. As a metal material, aluminum flakes will affect the quality of subsequent recycling if they are not cleaned. Furthermore, because the density difference between aluminum flakes and PET bottle flakes is small, they cannot be removed by flotation using existing equipment, resulting in equipment defects. Although existing eddy current sorting machines can sort aluminum flakes, in actual use, the aluminum flakes overlap with the bottle flakes, causing the aluminum flakes to be repelled and splashed with the surrounding bottle flakes, making it impossible to effectively collect the bottle flakes and scattering them everywhere, thus reducing sorting efficiency.

[0006] Therefore, a multi-impurity separation device for recycled PET bottle flakes has been designed to effectively and efficiently sort aluminum flakes and address this deficiency. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a device for separating various impurities from recycled PET bottle flakes and its usage method, which solves the problem that existing equipment is unable to separate aluminum flake impurities from PET bottle flakes.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a multi-impurity separation device for recycled PET bottle flakes, comprising a material guiding and conveying mechanism, wherein the material guiding and conveying mechanism includes a stable base plate, and a conveying concave frame is fixedly connected to the top of the stable base plate via a fixing plate. First rotating rods are rotatably connected to both sides of the front portion of the inner cavity of the conveying concave frame via bearing components. Belt rollers are fixedly connected to the surface of the first rotating rods, and a first conveyor belt is drivingly connected between the two belt rollers. The rear end of the first rotating rod on the left side penetrates the conveying concave frame and extends to the rear portion of the conveying concave frame. A gear cylinder is fixedly connected to one end of the first rotating rod extending to the rear portion of the conveying concave frame. A material conveying and sorting mechanism is installed on the upper part of the stable base plate.

[0009] Preferably, the left side of the top of the stabilizing base plate is fixedly connected to an inclined guide frame for use with the material conveying and sorting mechanism via a bracket, and a water pump is fixedly installed on the top of the stabilizing base plate, with liquid guide pipes connected to both the water pump's outlet and inlet.

[0010] Preferably, the material conveying and sorting mechanism includes a conveying top frame, which is fixedly installed on the upper part of a stable base plate by a bracket. The two sides of the inner cavity of the conveying top frame are rotatably connected to a second rotating rod through bearing components. A magnetic roller and a transmission cylinder are respectively fixedly installed on the surfaces of the two second rotating rods. A first transmission groove is opened on the surface of the magnetic roller and the transmission cylinder. A second transmission groove is opened on the inner side of the first transmission groove. The two sides of the inner cavity of the conveying top frame are rotatably connected to a round guide rod through bearing components.

[0011] Preferably, a second conveyor belt is driven between the magnetic roller and the transmission cylinder, and the second conveyor belt is located inside the second transmission groove and is in contact with the round guide rod. The surface of the second conveyor belt is provided with polyester fiber cloth. A conveyor mesh belt is driven between the magnetic roller and the transmission cylinder, and the conveyor mesh belt is located inside the first transmission groove. The bottom of the top frame of the conveyor is fixedly connected to a material collection frame that works in conjunction with the conveyor mesh belt by a bracket.

[0012] Preferably, a storage frame is fixedly connected to the left side of the top of the conveying frame via a bracket. A third rotating rod is rotatably connected to the rear part of the inner cavity of the storage frame via a bearing. A conveying blade is fixedly connected to the surface of the third rotating rod, and the conveying blade is in contact with the inner wall of the storage frame. The front end of the third rotating rod passes through the storage frame and extends to the rear part of the storage frame. A material equalization hole is opened on the left side of the storage frame.

[0013] Preferably, the front end of the second rotating rod passes through the top frame of the conveyor and extends to the front of the top frame of the conveyor. The second rotating rod on the left side is connected to the third rotating rod via a pulley and belt drive. A motor is fixedly connected to the left side of the surface of the top frame of the conveyor via a bracket, and the output shaft of the motor is fixedly connected to the front end of the third rotating rod on the left side via a coupling.

[0014] Preferably, blowers for use with the conveyor belt are fixedly connected to both sides of the front and rear of the inner cavity of the conveyor top frame via brackets. A friction plate is fixedly connected between the tops of the two blowers via brackets, and the friction plate is in contact with the polyester fiber cloth. A reciprocating screw is rotatably connected to the surface of the conveyor top frame via bearing components. The right end of the reciprocating screw and the front end of the second rotating rod on the right side are fixedly connected to meshing bevel gears. A sliding plate is fixedly installed on the surface of the conveyor top frame.

[0015] Preferably, a threaded cylinder is slidably connected to the surface of the reciprocating screw, a slider is fixedly connected to the rear of the threaded cylinder, and the slider is slidably connected to a sliding plate. A rectangular liquid frame is fixedly connected to the bottom of the threaded cylinder through a bracket, and the rectangular liquid frame is located above the first conveyor belt. An atomizing nozzle is provided at the bottom of the rectangular liquid frame, and one end of the liquid guide pipe on the right side is connected to the rectangular liquid frame. A retraction frame is fixedly connected to the right side of the reciprocating screw through a bracket. An arc-shaped toothed plate that meshes with the gear cylinder is slidably installed on the inner side of the retraction frame, and a spring is fixedly connected between the arc-shaped toothed plate and the inner wall of the retraction frame.

[0016] This invention also discloses a method for using a multi-impurity separation device for recycled PET bottle flakes, specifically including the following steps:

[0017] S1. Bottle flake adsorption: The starting motor drives the second conveyor belt, and static electricity is generated by friction with the friction plate, which is used to adsorb and fix the bottle flakes.

[0018] S2. Impurity Separation: After the conveyor belt moves the bottle flakes to the right side, the magnetic roller inside the magnetic roller generates a repulsive force to separate the aluminum flakes from the impurities.

[0019] S3. Static Electricity Elimination: After the sheet material falls to the top of the first conveyor belt, static electricity is eliminated by spraying static eliminator with a rectangular liquid frame.

[0020] This invention provides a device for separating various impurities from recycled PET bottle flakes and its method of use. Compared with existing technologies, it has the following advantages:

[0021] (1) The PET bottle flake recycling material uses a multi-impurity separation device and its usage method. By combining the material conveying mechanism and the material sorting mechanism, the two mechanisms can use the motor to drive the second conveyor belt, polyester fiber cloth and conveyor mesh belt to rotate, and use the static electricity generated after friction to adsorb the bottle material on the surface of the conveyor mesh belt for reinforcement. Then, the aluminum flakes are sorted by the repulsive force generated by the magnetic roller. Furthermore, the cooperation between the structures can be used to drive the second conveyor belt and polyester fiber cloth to separate from the conveyor mesh belt, thereby facilitating the feeding of bottle flakes and continuously generating static friction on the polyester fiber cloth to ensure the stable operation of the equipment.

[0022] (2) The PET bottle flake recycling material uses a multi-impurity separation device and its usage method. The magnetic roller and the transmission cylinder are respectively provided with a first transmission groove and a second transmission groove. A second conveyor belt and a conveyor mesh belt are connected to the inner side of the magnetic roller and the transmission cylinder. At the same time, the surface of the second conveyor belt is provided with polyester fiber cloth. The arrangement of these structures can rotate the second conveyor belt and the conveyor mesh belt. First, the polyester fiber cloth is used to generate static electricity by friction with the friction plate. Then, the bottle flakes are adsorbed and fixed. This prevents the bottle flakes from splashing when the aluminum flakes are sorted by repulsion. This not only ensures the cleanliness of the working environment, but also improves the collection efficiency and quality of the bottle flakes, which meets the current use requirements.

[0023] (3) The PET bottle flake recycling material uses a variety of impurity separation devices and their usage methods. A round guide rod is installed at the front of the inner cavity of the top frame of the conveyor, and it is used in conjunction with a blower, a friction plate and a material collection frame. When the second conveyor belt and the conveyor mesh belt drive the bottle flakes to rotate to the bottom, the round guide rod guides the polyester fiber cloth to separate the polyester fiber cloth from the conveyor mesh belt, reducing the static electricity adsorption force on the bottle flakes. At the same time, after the blower comes into contact with the conveyor mesh belt, it blows the bottle flakes from the bottom of the conveyor mesh belt and drops them to the top of the first conveyor belt through the material collection frame. The separated polyester fiber cloth can be rubbed again with the friction plate to ensure that the static electricity on the surface can continue to be generated.

[0024] (4) The PET bottle flake recycling material uses a multi-impurity separation device and its usage method. By installing a threaded cylinder on the surface of the reciprocating screw and installing a rectangular liquid frame and a retraction frame at its bottom, the threaded cylinder can drive the rectangular liquid frame and the retraction frame to move back and forth through the transmission of bevel gears. Each movement allows the retraction frame to use the arc-shaped toothed plate to drive the first conveyor belt and the bottle flakes at the top to move a short distance. Then, the rectangular liquid frame is used to spray the bottle flakes with an electrostatic eliminator, which makes the subsequent recycling process convenient and improves the overall perfection of the equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a rear view of the structure of the material guiding and conveying mechanism and the material sorting mechanism of the present invention;

[0027] Figure 3 This is a schematic diagram of the material guiding and conveying mechanism structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the first rotating rod, belt roller, and first conveyor belt of the present invention;

[0029] Figure 5 This is a schematic diagram of the material conveying and sorting mechanism structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the rectangular liquid frame, atomizing nozzle, and retraction frame structure of the present invention.

[0031] Figure 7 This is a schematic diagram of the material-holding frame structure of the present invention;

[0032] Figure 8 This is a cross-sectional view of the storage frame structure of the present invention;

[0033] Figure 9 This is a schematic diagram of the second conveyor belt, conveyor mesh belt, and motor structure of the present invention;

[0034] Figure 10 This is a cross-sectional view of the top frame structure of the present invention;

[0035] Figure 11 This is a schematic diagram of the blower and friction plate structure of the present invention;

[0036] Figure 12 This is a schematic diagram of the magnetic roller, transmission cylinder, first transmission groove, and second transmission groove structure of the present invention.

[0037] Figure 13 For the present invention Figure 12 A magnified view of a section at point A in the middle;

[0038] Figure 14 This is a schematic diagram of the second conveyor belt and polyester fiber cloth structure of the present invention.

[0039] In the diagram: 1. Material guiding and conveying mechanism; 2. Material conveying and sorting mechanism; 101. Stabilizing base plate; 102. Conveying concave frame; 103. First rotating rod; 104. Belt roller; 105. First conveyor belt; 106. Gear cylinder; 107. Inclined guide frame; 108. Water pump; 109. Liquid guide pipe; 201. Conveying top frame; 202. Second rotating rod; 203. Magnetic roller; 204. Transmission cylinder; 205. First transmission groove; 206. Second transmission groove; 207. Circular guide rod; 208. Second conveyor belt; 209. Grinding... 210. Ester fiber cloth; 211. Conveyor belt; 212. Storage box; 213. Third rotating rod; 214. Feeding impeller; 215. Material distribution hole; 216. Pulley; 217. Belt; 218. Motor; 219. Blower; 220. Friction plate; 221. Reciprocating screw; 222. Bevel gear; 222. Sliding plate; 223. Threaded cylinder; 224. Slider; 225. Rectangular liquid frame; 226. Atomizing nozzle; 227. Retraction frame; 228. Arc-shaped toothed plate; 229. Spring; 230. Material collection frame. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figures 1-14 The present invention provides a technical solution: a multi-impurity separation device for recycled PET bottle flakes, including a material conveying mechanism 1;

[0042] Please refer to Figure 2 , Figure 3 and Figure 4The diagram illustrates the overall structure of the material conveying mechanism 1. The mechanism includes a stable base plate 101. A conveying recess 102 is fixedly connected to the top of the stable base plate 101 via a fixing plate. First rotating rods 103 are rotatably connected to both sides of the front portion of the inner cavity of the conveying recess 102 via bearing components. Belt rollers 104 are fixedly connected to the surface of the first rotating rods 103. A first conveyor belt 105 is drive-connected between the two belt rollers 104. The rear end of the left first rotating rod 103 passes through the conveying recess 102 and extends to the conveyor belt 105. At the rear of the conveying concave frame 102, the first rotating rod 103 extends to one end of the conveying concave frame 102 and is fixedly connected to a gear cylinder 106. A material conveying and sorting mechanism 2 is installed on the upper part of the stable base plate 101. A sloping guide frame 107 that works in conjunction with the material conveying and sorting mechanism 2 is fixedly connected to the left side of the top of the stable base plate 101 via a bracket. A water pump 108 is fixedly installed on the top of the stable base plate 101. Both the outlet and inlet of the water pump 108 are connected to a liquid guide pipe 109, which is a retractable flexible hose.

[0043] Please refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 12 and Figure 14The diagram illustrates the overall structure of the material conveying and sorting mechanism 2. The mechanism includes a conveyor top frame 201, which is fixedly mounted on the upper part of a stable base plate 101 via a bracket. Two second rotating rods 202 are rotatably connected to the front and rear sides of the inner cavity of the conveyor top frame 201 via bearings. Magnetic rollers 203 and transmission cylinders 204 are respectively fixedly mounted on the surfaces of the two second rotating rods 202. First transmission grooves 205 are formed on the surfaces of both the magnetic rollers 203 and the transmission cylinders 204, and second transmission grooves 206 are formed on the inner sides of the first transmission grooves 205. Round guide rods 207 are rotatably connected to the front sides of the inner cavity of the conveyor top frame 201 via bearings. A second conveyor belt 20 is connected between the magnetic rollers 203 and the transmission cylinders 204. 8. The second conveyor belt 208 is located inside the second transmission groove 206 and is in contact with the round guide rod 207. The surface of the second conveyor belt 208 is provided with polyester fiber cloth 209, which is bonded to the surface of the second conveyor belt 208 and is in contact with the round guide rod 207. A conveyor belt 210 is connected between the magnetic roller 203 and the transmission cylinder 204, and the conveyor belt 210 is located inside the first transmission groove 205. The bottom of the top frame 201 is fixedly connected to a material collection frame 230 that works with the conveyor belt 210 via a bracket. The left side of the top of the top frame 201 is fixedly connected to a storage frame 211 via a bracket. The rear part of the inner cavity of the storage frame 211 is rotatably connected to a third rotating rod 2 via a bearing. 12. A conveying blade 213 is fixedly connected to the surface of the third rotating rod 212, and the conveying blade 213 is in contact with the inner wall of the storage frame 211. The front end of the third rotating rod 212 passes through the storage frame 211 and extends to the rear of the storage frame 211. A material equalization hole 214 is opened on the left side of the storage frame 211. The front end of the second rotating rod 202 passes through the conveying top frame 201 and extends to the front of the conveying top frame 201. The left side of the second rotating rod 202 and the third rotating rod 212 are connected by a pulley 215 and a belt 216. A motor 217 is fixedly connected to the left side of the surface of the conveying top frame 201 by a bracket. The motor 217 is a servo motor, and the output shaft of the motor 217 is fixedly connected to the front end of the left side of the third rotating rod 212 by a coupling. Blowers 218, which work in conjunction with the conveyor belt 210, are fixedly connected to both sides of the inner cavity between the front and rear sections via brackets. A friction plate 219 is fixedly connected between the tops of the two blowers 218 via brackets, and the friction plate 219 is in contact with the polyester fiber cloth 209. A reciprocating screw 220 is rotatably connected to the surface of the conveyor top frame 201 via bearings. The right end of the reciprocating screw 220 and the front end of the right second rotating rod 202 are both fixedly connected to meshing bevel gears 221. A sliding plate 222 is fixedly installed on the surface of the conveyor top frame 201. A threaded cylinder 223 is slidably connected to the surface of the reciprocating screw 220. A slider 224 is fixedly connected to the rear of the threaded cylinder 223, and the slider 224 is slidably connected to the sliding plate 222.A rectangular liquid frame 225 is fixedly connected to the bottom of the threaded cylinder 223 via a bracket, and the rectangular liquid frame 225 is located above the first conveyor belt 105. An atomizing nozzle 226 is installed at the bottom of the rectangular liquid frame 225. One end of the right-side liquid guide pipe 109 is connected to the rectangular liquid frame 225. A retraction frame 227 is fixedly connected to the right side of the reciprocating screw 220 via a bracket. An arc-shaped toothed plate 228 that meshes with the gear cylinder 106 is slidably installed on the inner side of the retraction frame 227. A spring 229 is fixedly connected between the arc-shaped toothed plate 228 and the inner wall of the retraction frame 227.

[0044] This invention also discloses a method for using a multi-impurity separation device for recycled PET bottle flakes, specifically including the following steps:

[0045] S1. Bottle flake adsorption: The starting motor 217 drives the second conveyor belt 208 to drive the transmission, and uses the friction with the friction plate 219 to generate static electricity, and uses static electricity to adsorb and fix the bottle flakes.

[0046] S2. Impurity separation: After the conveyor belt 210 moves the bottle flakes to the right side, the magnetic roller inside the magnetic roller 203 generates a repulsive force to separate the aluminum flakes from the impurities.

[0047] S3. Static Electricity Elimination: After the sheet material falls to the top of the first conveyor belt 105, static electricity is eliminated by spraying static electricity eliminator using a rectangular liquid frame 225.

[0048] The more specific steps of using the above-mentioned device for separating multiple impurities from recycled PET bottle flakes are as follows:

[0049] S1. Bottle Flake Adsorption: Before use, connect the liquid guide tube 109 on the left to the static eliminator. Then place the crushed bottle material inside the storage frame 211. Then start the motor 217 to drive the transmission cylinder 204 to rotate. Since the second conveyor belt 208 and the conveyor mesh belt 210 are both connected by transmission, the magnetic roller 203 also rotates. When the second conveyor belt 208 is driven, it will drive the polyester fiber cloth 209 to rub against the friction plate 219. Then, as the polyester fiber cloth 209 is driven, it will eventually stick to the conveyor mesh belt 210. The rotation of the second rotating rod 202 uses the pulley 215 and belt 216 to drive the third rotating rod 212 and the conveyor blade 213 to rotate. At this time, the conveyor blade 213 rotates clockwise to discharge a small amount of bottle flakes from the equalization hole 214 and evenly fall on the top of the conveyor mesh belt 210. At this time, the electrostatic polyester fiber cloth 209 generates an adsorption force on the bottle flakes and adsorbs the bottle flakes onto the surface of the conveyor mesh belt 210.

[0050] S2. Impurity Separation: After the conveyor belt 210 moves the bottle flakes to the far right, the magnetic roller inside the magnetic roller 203 generates a magnetic repulsive force by rotating at high speed. After the bottle flakes enter the magnetic field range, the repulsive force pushes the aluminum sheet out of the bottle flakes. As the conveyor belt 210 continues to rotate, the larger bottle flakes fall off by their own weight and slide onto the top of the first conveyor belt 105 through the inclined guide frame 107. As the conveyor belt 210 and the second conveyor belt 208 continue to drive, the second conveyor belt 208 is guided by the round guide rod 207 to separate from the conveyor belt 210 and bulge upward. When the conveyor belt 210 passes under the blower 218, the two blowers 218 blow the remaining bottle flakes off the surface of the conveyor belt 210 and then fall onto the top of the first conveyor belt 105 by the guide of the material collection frame 230. The bulging second conveyor belt 208 drives the polyester fiber cloth 209 to stick to the friction plate 219 and rub against it again to generate static electricity.

[0051] S3. Static Electricity Elimination: After the sheet material falls onto the top of the first conveyor belt 105, the rotating second rotor 202 drives the reciprocating screw 220 to rotate via the meshing of two bevel gears 221. At this time, the threaded cylinder 223, guided by the slider 224 and the sliding plate 222, drives the rectangular liquid frame 225 and the retraction frame 227 to reciprocate synchronously. Each time the retraction frame 227 moves to the right, the arc-shaped toothed plate 228 is pressed into the retraction frame 227 and does not mesh with the gear cylinder 106. Then, when the retraction frame 227 moves to the left, the right-angled part of the arc-shaped toothed plate 228 meshes with the gear cylinder 106, thereby driving the gear cylinder 106 to rotate. When the gear cylinder 106 rotates, the belt roller 104 will drive the first conveyor belt 105 to move to the left, allowing the bottle piece at the top to move. When the retraction frame 227 moves to the right again, the rectangular liquid frame 225 will move from the top of the bottle piece, and the rectangular liquid frame 225 will spray the static eliminator on the surface of the bottle piece to facilitate subsequent processing.

[0052] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A device for separating multiple impurities from recycled PET bottle flakes, comprising a material conveying mechanism (1), characterized in that: The material conveying mechanism (1) includes a stable base plate (101). A conveying recess (102) is fixedly connected to the top of the stable base plate (101) via a fixed plate. The two sides of the front part of the inner cavity of the conveying recess (102) are rotatably connected to a first rotating rod (103) via bearing components. A belt roller (104) is fixedly connected to the surface of the first rotating rod (103). A first conveyor belt (105) is connected between the two belt rollers (104). The rear end of the first rotating rod (103) on the left side passes through the conveying recess (102) and extends to the rear part of the conveying recess (102). A gear cylinder (106) is fixedly connected to one end of the first rotating rod (103) extending to the rear part of the conveying recess (102). A material conveying and sorting mechanism (2) is installed on the upper part of the stable base plate (101). The material conveying and sorting mechanism (2) includes a conveying top frame (201), which is fixedly installed on the upper part of the stable base plate (101) by a bracket. The two sides of the inner cavity of the conveying top frame (201) are rotatably connected to the second rotating rod (202) by bearing components. The surfaces of the two second rotating rods (202) are respectively fixedly installed with a magnetic roller (203) and a transmission cylinder (204). The surfaces of the magnetic roller (203) and the transmission cylinder (204) are respectively provided with a first transmission groove (205). The inner side of the first transmission groove (205) is provided with a second transmission groove (206). The two sides of the inner cavity of the conveying top frame (201) are rotatably connected to the round guide rod (207) by bearing components. A second conveyor belt (208) is connected between the magnetic roller (203) and the transmission cylinder (204), and the second conveyor belt (208) is located inside the second transmission groove (206) and is in contact with the round guide rod (207). The surface of the second conveyor belt (208) is provided with polyester fiber cloth (209). A conveyor mesh belt (210) is connected between the magnetic roller (203) and the transmission cylinder (204), and the conveyor mesh belt (210) is located inside the first transmission groove (205). The bottom of the top frame (201) is fixedly connected to a material collection frame (230) that works with the conveyor mesh belt (210) by a bracket. Both sides of the inner cavity of the conveyor top frame (201) between the front and rear are fixedly connected by brackets to blowers (218) that cooperate with the conveyor belt (210). A friction plate (219) is fixedly connected between the tops of the two blowers (218) by brackets, and the friction plate (219) is in contact with the polyester fiber cloth (209). A reciprocating screw (220) is rotatably connected to the surface of the conveyor top frame (201) by bearing components. The right end of the reciprocating screw (220) and the front end of the right second rotating rod (202) are fixedly connected to bevel gears (221) that mesh with each other. A sliding plate (222) is fixedly installed on the surface of the conveyor top frame (201). When the second conveyor belt (208) is driven, it will drive the polyester fiber cloth (209) to rub against the friction plate (219). Then, as the polyester fiber cloth (209) is driven, it will eventually stick to the conveyor belt (210). The electrostatic polyester fiber cloth (209) will generate an adsorption force on the bottle pieces, adsorbing the bottle pieces onto the surface of the conveyor belt (210). After the conveyor belt (210) moves the bottle sheet to the far right, the magnetic roller inside the magnetic roller (203) generates a magnetic repulsive force by rotating at high speed. After the bottle sheet enters the magnetic field range, the repulsive force pushes the aluminum sheet out of the bottle sheet. As the conveyor belt (210) and the second conveyor belt (208) continue to move, the second conveyor belt (208) is guided by the round guide rod (207) to separate from the conveyor belt (210) and bulge upward. When the conveyor belt (210) passes under the blower (218), the two blowers (218) blow the remaining bottle flakes off the surface of the conveyor belt (210).

2. The multi-impurity separation device for recycled PET bottle flakes according to claim 1, characterized in that: The left side of the top of the stable base plate (101) is fixedly connected to the inclined guide frame (107) for use with the material conveying and sorting mechanism (2) by a bracket. A water pump (108) is fixedly installed on the top of the stable base plate (101). The outlet and inlet of the water pump (108) are both connected to a liquid guide pipe (109).

3. The multi-impurity separation device for recycled PET bottle flakes according to claim 2, characterized in that: A storage frame (211) is fixedly connected to the left side of the top of the conveying top frame (201) via a bracket. A third rotating rod (212) is rotatably connected to the rear of the inner cavity of the storage frame (211) via a bearing. A conveying blade (213) is fixedly connected to the surface of the third rotating rod (212), and the conveying blade (213) is in contact with the inner wall of the storage frame (211). The front end of the third rotating rod (212) penetrates through the storage frame (211) and extends to the rear of the storage frame (211). A material equalization hole (214) is opened on the left side of the storage frame (211).

4. A multi-impurity separation device for recycled PET bottle flakes according to claim 3, characterized in that: The front end of the second rotating rod (202) passes through the top frame (201) and extends to the front of the top frame (201). The second rotating rod (202) on the left side and the third rotating rod (212) are connected by a pulley (215) and a belt (216). A motor (217) is fixedly connected to the left side of the surface of the top frame (201) by a bracket, and the output shaft of the motor (217) is fixedly connected to the front end of the third rotating rod (212) on the left side by a coupling.

5. A multi-impurity separation device for recycled PET bottle flakes according to claim 4, characterized in that: The reciprocating screw (220) is slidably connected to a threaded cylinder (223). A slider (224) is fixedly connected to the rear of the threaded cylinder (223), and the slider (224) is slidably connected to a sliding plate (222). A rectangular liquid frame (225) is fixedly connected to the bottom of the threaded cylinder (223) through a bracket. The rectangular liquid frame (225) is located above the first conveyor belt (105). An atomizing nozzle (226) is provided at the bottom of the rectangular liquid frame (225). One end of the liquid guide pipe (109) on the right side is connected to the rectangular liquid frame (225). A retraction frame (227) is fixedly connected to the right side of the reciprocating screw (220) through a bracket. An arc-shaped toothed plate (228) that meshes with the gear cylinder (106) is slidably installed on the inner side of the retraction frame (227). A spring (229) is fixedly connected between the arc-shaped toothed plate (228) and the inner wall of the retraction frame (227).

6. The method of using the multi-impurity separation device for recycled PET bottle flakes according to claim 5, characterized in that: Specifically, the following steps are included: S1, Bottle flake adsorption: The starting motor (217) drives the second conveyor belt (208) to drive the transmission, and uses the friction with the friction plate (219) to generate static electricity, and uses static electricity to adsorb and fix the bottle flakes; S2, Impurity Separation: After the conveyor belt (210) moves the bottle flakes to the right side, the magnetic roller inside the magnetic roller (203) generates a repulsive force to separate the aluminum flakes impurities. S3, Static Elimination: After the sheet material falls on the top of the first conveyor belt (105), static eliminator is sprayed using a rectangular liquid frame (225) to eliminate static electricity.

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