Filtering and grinding device and method for recycled plastic

Abstract

The invention discloses a filtering and grinding device and method for recycled plastic, and relates to the technical field of recycled plastic grinding treatment. An arc-shaped sieve plate is fixed to the upper portion of the peripheral side of the grinding roller in a penetrating mode, an arc-shaped grinding plate is fixed to the lower portion of the peripheral side of the grinding roller in a penetrating mode, supporting rings are fixed to the two ends of the grinding roller, movable grooves and supporting seats are formed in the peripheral sides of the supporting rings, and connecting plates and material receiving frames are fixed to the edges, close to each other, of the tops of the two supporting seats. The material receiving frame is arranged in an up-down penetrating mode, connecting strips are fixed to the two ends of the material receiving frame, the grinding assembly comprises a first rotating motor fixed to one end of the grinding roller, the overturning assembly comprises a second rotating motor fixed to one end of the grinding roller and a servo motor, and an overturning shaft fixed to one end of the grinding roller in a penetrating mode is fixed to the output end of the servo motor. In the recycled plastic grinding process, multi-stage grinding and screening are not needed when the recycled plastic is ground to the proper particle size, and the overall grinding efficiency is higher.

Description

Technical Field

[0001] The present invention belongs to the technical field of recycling plastic grinding treatment, and particularly relates to a filtering and grinding device and method for recycled plastics. Background Art

[0002] Plastic waste has a serious impact on the environment, health and economy. For example, microplastics pollute the ocean and enter the food chain. Recycling plastics can reduce the accumulation of plastic waste and environmental pollution, and reduce the damage to the ecosystem. Plastics are made from fossil fuels such as petroleum. Recycling plastics can save resources, reduce the demand for new plastic production, lower energy consumption and greenhouse gas emissions, and promote the development of a circular economy. The plastic recycling industry can create job opportunities and drive economic development. Recycled plastics can be used as raw materials for producing new plastic products, reducing production costs; Common recycled plastics, such as "PET (polyethylene terephthalate), HDPE (high-density polyethylene), PP (polypropylene)", etc., need to be ground into small particles for reuse during recycling; Plastic grinding refers to the process of processing plastic materials into the required particle size or particle state by mechanical or chemical methods. Among them, mechanical grinding is the most common plastic grinding method, including using various grinding equipment such as grinders, crushers, hammer mills, etc. These devices break the plastic materials into smaller particles by rotating or vibrating; At the same time, after retrieving existing public documents, a patent document with the publication number CN118181587B discloses a multi-stage grinding device for plastic raw material processing and its use method, which is applied in the field of grinding devices. By setting a driving component, the screening component can be driven to perform reciprocating motion to screen large and small plastic raw materials. At the same time, the driving component can also synchronously drive the grinding component to work to perform grading grinding on the screened large and small plastic raw materials, thereby forming multi-stage grinding, which can reduce the storage time of plastic raw materials in the device and avoid the situation of over-grinding of smaller plastic raw materials being blocked by larger plastic raw materials for a long time; at the same time, the device can also adjust the distance between three grinding discs and three grinding seats through the driving component, so that the device can meet the multi-stage grinding work for plastic particles of different sizes; moreover, the device realizes screening, multi-stage grinding and distance adjustment through a single driving device, and the overall manufacturing cost is low, but it still has the following drawbacks in actual use: During the overall grinding process of plastics, the above-mentioned patent only adopts multi-stage grinding and screening, which requires multiple steps of separate grinding to fully grind the plastics. After the grinding of the plastics is completed, screening is required. The grinding and screening through different structures are carried out step by step. After grinding, the unqualified plastics remaining after screening need to be recycled into the grinding structure. During the operation, the same batch of recycled plastics needs to be ground in multiple steps to reach the final particle size. The grinding process is relatively long, resulting in a relatively long grinding time and affecting the grinding efficiency of plastics. Summary of the Invention

[0003] The purpose of the present invention is to provide a filtering and grinding device and method for recycled plastics. By setting a grinding drum, a support seat, a material receiving frame, a grinding component, a turning component, a feeding cylinder and a servo motor, the problem that multi-stage grinding and screening are required for grinding recycled plastics and the overall grinding process is relatively long is solved.

[0004] To solve the above technical problems, the present invention is realized through the following technical solutions: The present invention is a filtering and grinding device for the production of recycled plastics, including a grinding drum. An arc-shaped sieve plate is fixedly penetrated through the upper part of the circumference of the grinding drum, and an arc-shaped grinding plate is fixedly penetrated through the lower part of the circumference of the grinding drum. Support rings are fixed at both ends of the grinding drum, and an activity groove is provided on the circumference of the support ring. There are support seats, and connecting plates are fixedly provided at the edges of the tops of the two support seats close to each other. There is a material receiving frame, and the material receiving frame is arranged to be penetrated up and down, and connecting bars are fixedly connected to both ends of the material receiving frame. The grinding component includes a rotating motor I fixed at one end of the grinding drum, and a rotating shaft I is fixed at the output end of the rotating motor I. The turning component includes a rotating motor II fixed at one end of the grinding drum and located below the rotating motor I. There is a servo motor, and a turning shaft fixedly penetrated through one end of the grinding drum is fixed at the output end of the servo motor. During operation, the recycled plastic raw materials to be ground are accommodated in the grinding drum through the grinding drum. The connecting plate is fixed on it through the support seat, and the support plate is fixed on it through the connecting plate, and the support rollers on the support plate fixed on the support plate provide auxiliary support for the grinding drum. The raw materials leaking from the sieve holes on the arc-shaped sieve plate are received through the connecting frame. The grinding roller included in the grinding component cooperates with the arc-shaped grinding plate, so that when working, the raw material particles of the recycled plastics are ground into particles. After grinding, they are turned over by the turning component, and the recycled plastic particles are turned over and screened on the arc-shaped sieve plate, and when the servo motor works, the entire grinding drum is turned over.

[0005] Further, both ends of the grinding drum are closed, the central axis of the grinding drum is horizontally arranged, and the two support seats are both arranged below the support ring and symmetrically arranged below the grinding drum. An activity groove is formed on the circumferential side of each support ring, and vertical sieve holes are uniformly formed through the arc-shaped sieve plate. The grinding drum is movably connected to the support roller through the activity groove on the support ring.

[0006] Further, the two connecting bars are respectively fixed to the two connecting plates. Four corner supports are fixed at the top of each connecting plate. Between the two supports on the same short side at the top of the same connecting plate, a support roller is rotatably connected in common at the upper part. The two support rollers above the same connecting plate are movably connected in the activity groove on the same support ring and can roll with the support ring, so that during the work, the grinding drum is well supported on the support seat.

[0007] Further, a collecting hopper for collecting materials is fixedly communicated with the bottom of the material receiving frame, and an output square pipe for outputting recycled plastic is fixedly communicated with the output end of the collecting hopper. The material receiving frame is movably connected to the lower part of the circumferential side of the grinding drum. The recycled plastic particles screened out on the grinding drum are guided into the collecting hopper through the material receiving frame for collection, and are collected in the collecting hopper and output through the output square pipe.

[0008] Further, the grinding assembly includes a turntable and grinding rollers. The first rotating shaft penetrates through one end of the grinding drum and is rotatably connected to the inner wall of the grinding drum on the side away from the first rotating motor. The first rotating shaft is arranged on the circumferential side inside the grinding drum, and turntables are fixed at both edges. Grinding rollers for grinding recycled plastic are rotatably connected in an annular array at the edges between the two turntables. The edges of the grinding rollers extend out of the circumferential side of the turntable, and the grinding roller at the bottom rotates and contacts the arc-shaped grinding plate inside the grinding drum. The first rotating motor drives the first rotating shaft to rotate, driving the turntable to rotate, and during the rotation of the turntable, driving the grinding rollers to roll to grind the recycled plastic particles.

[0009] Further, the turning assembly further includes a second rotating shaft and turning plates. The output end of the second rotating motor is fixed with a second rotating shaft passing through one end of the grinding drum. Turning plates are fixed in an annular array on the circumferential side of the second rotating shaft inside the grinding drum. The end of the second rotating shaft away from the second rotating motor is rotatably connected to the inner wall of the grinding drum on the side away from the second rotating motor, and the top of the turning plate at the uppermost part contacts the inner upper part of the arc-shaped sieve plate. The second rotating motor drives the second rotating shaft to rotate, driving the turning plates to rotate, and the rotation of the turning plates drives the ground recycled plastic particles to be turned over.

[0010] Further, a movable hole is formed in the center of the end of the grinding roller away from the servo motor. A feeding cylinder is movably connected through the movable hole. A driving motor is fixed at the end of the feeding cylinder away from the grinding roller. The output end of the driving motor is fixed with an inner shaft that penetrates through one end of the feeding cylinder. A spiral blade for spirally conveying and recycling plastic materials is fixed on the periphery of the inner shaft in the feeding cylinder. The spiral blade is movably connected in the feeding cylinder. The grinding roller is movably connected to the feeding cylinder through the movable hole, and the feeding cylinder drives the inner shaft to drive the spiral blade to rotate through the driving motor.

[0011] Further, an upper part of the periphery of the feeding cylinder outside the grinding roller is fixedly communicated with a feeding pipe. The top end of the feeding pipe is communicated with the recycling plastic raw material conveying equipment that needs to be ground. A feeding port is fixedly communicated with a lower part of the periphery of the feeding cylinder in the grinding roller. A first support column is fixed on the lower part of the periphery of the feeding cylinder outside the grinding roller. During the rotation of the spiral blade in the grinding roller, the recycled plastic particles entering the feeding cylinder from the feeding pipe are driven to the feeding port and then conveyed into the grinding roller.

[0012] Further, a second support column is fixed at the bottom of the servo motor, and the bottom ends of the first support column and the second support column are respectively fixed on the tops of two support seats. Two connecting rods are symmetrically fixed on the periphery of the turning shaft in the grinding roller. Each end of the connecting rod away from the turning shaft is fixed to the inner wall of the grinding roller, so that during operation, the servo motor drives the turning shaft and the connecting rods to rotate, turning the grinding roller.

[0013] Further, a filtering and grinding method for recycled plastic production includes the following technological processes: S1: First, start the servo motor to drive the turning shaft to rotate. After the turning shaft rotates, drive the connecting rods and the grinding roller to rotate until the arc-shaped sieve plate on the grinding roller faces upward and the arc-shaped grinding plate faces downward. S2: After setting the position of the grinding roller, start the driving motor to drive the inner shaft to rotate, driving the spiral blade to rotate. At this time, the recycled plastic raw material is conveyed into the feeding cylinder through the feeding pipe. In the feeding cylinder, the spiral blade rotates, and during the rotation process, the spiral blade drives the recycled plastic raw material entering the feeding cylinder to the feeding port and then falls into the grinding roller, and gathers on the arc-shaped grinding plate at the lower part of the grinding roller. S3: After feeding for ten minutes, stop the driving motor to stop feeding, and start the first rotating motor included in the grinding assembly. The driving motor drives the first rotating shaft to rotate, and during the rotation of the first rotating shaft, drives the two turntables to rotate, driving the grinding rollers to roll. During the rolling of the grinding rollers, grind the recycled plastic material on the arc-shaped grinding plate. S4: After grinding the plastic material for every twenty minutes, start the servo motor to drive the turning shaft and the connecting rods to drive the grinding roller to flip, so that the arc-shaped sieve plate rotates to align with the receiving frame. S5: After the grinding drum is turned over, stop the operation of Motor 1. The recycled plastic raw materials to be ground gather inside the arc-shaped sieve plate on the grinding drum, and then start Motor 2 to drive the rotation of Shaft 2. During the rotation of Shaft 2, the turning plate is driven to rotate. During the rotation of the turning plate, the ground recycled plastic raw material particles on the arc-shaped sieve plate are turned over, so that the recycled plastic raw material particles of the appropriate size fall into the material receiving frame. S6: The recycled plastic particles that fall into the material receiving frame enter the aggregate hopper, and then fall into the discharge square pipe in the aggregate hopper. The bottom end of the discharge square pipe is connected to the external material receiving equipment, and the materials are output to the external material receiving equipment through the discharge square pipe. S7: After starting Motor 2 to drive the rotation of Shaft 2 and driving the turning plate to rotate for five minutes, restart the reverse rotation of the servo motor to drive the grinding drum to turn back to its original position. The unqualified plastic blocks after screening fall back onto the arc-shaped grinding plate again. Stop Motor 2 from driving the rotation of Shaft 2 and start the driving motor to drive the inner shaft to drive the spiral blade to feed, so that the materials are conveyed into the grinding drum to start the next working cycle.

[0014] The present invention has the following beneficial effects: By setting the grinding drum, support base, material receiving frame, grinding assembly, turning assembly, material conveying cylinder and servo motor, the present invention solves the problem that in the grinding of recycled plastics, multi-stage grinding and screening are required for grinding, and the overall grinding process is relatively long. During operation, after the material is input into the material conveying cylinder by the arc-shaped grinding plate of the grinding drum first, the materials gather on the arc-shaped grinding plate and are ground by the grinding assembly for 20 minutes. After 20 minutes of grinding, the servo motor can be started to drive the turning shaft and the connecting rod to drive the grinding drum to turn over. During the turning over of the grinding drum, the ground recycled plastic particles in the grinding drum fall onto the arc-shaped sieve plate and are gathered by the arc-shaped sieve plate to screen the recycled plastic particles. After Motor 2 drives the rotation of Shaft 2 to drive the turning plate to turn over the recycled plastic particles on the arc-shaped sieve plate, the recycled plastic particles ground to the qualified particle size are conveyed to the material receiving frame through the sieve holes on the arc-shaped sieve plate, and the unqualified particle sizes remain in the grinding drum. With the turning over of the grinding drum, they fall back onto the arc-shaped grinding plate in the grinding drum and enter the next grinding cycle. In the grinding of recycled plastics, in the overall grinding, only one grinding is required to directly grind the plastics to the appropriate particle size and complete the screening. Moreover, the recycled plastics with unqualified volume can be conveniently gathered into the next batch of plastics to be ground and ground together with the next batch of plastics, reducing the operation steps and saving time. Description of the Drawings

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0016] Figure 1 It is a three-dimensional structure diagram of a filter and grinding device for recycled plastic production after being partially cut open; Figure 2 It is a three-dimensional semi-sectional structure diagram of a grinding roller; Figure 3 It is a three-dimensional structure diagram of a support base; Figure 4 It is a three-dimensional structure diagram of a material receiving frame; Figure 5 It is a three-dimensional structure diagram of a grinding assembly; Figure 6 It is a three-dimensional structure diagram of a turning assembly; Figure 7 It is a three-dimensional structure diagram of a feeding cylinder after being partially cut open; Figure 8 It is a three-dimensional structure diagram of a servo motor; Figure 9 It is a complete three-dimensional structure diagram of a filter and grinding device for recycled plastic production; Figure 10 It is a flow chart of a filter and grinding method for recycled plastic production.

[0017] Reference numerals: 1. Grinding roller; 101. Arc-shaped sieve plate; 102. Sieve holes; 103. Arc-shaped grinding plate; 104. Activity holes; 105. Support ring; 106. Activity groove; 2. Support base; 201. Connecting plate; 202. Support plate; 203. Support rollers; 3. Material receiving frame; 301. Connecting strip; 302. Aggregating hopper; 303. Discharge square pipe; 4. Grinding assembly; 401. Rotating motor I; 402. Shaft I; 403. Turntable; 404. Grinding roller; 5. Turning assembly; 501. Rotating motor II; 502. Shaft II; 503. Turning plate; 6. Feeding cylinder; 601. Driving motor; 602. Inner shaft; 603. Spiral blade; 604. Feed pipe; 605. Feed inlet; 606. Support column I; 7. Servo motor; 701. Turning shaft; 702. Connecting rod; 703. Support column II. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Please refer to Figure 1 , 2 , 3, 4, 7, 8, 9. The present invention is a filtering and grinding device for recycled plastic production, including a grinding drum 1 with an arc-shaped sieve plate 101 fixedly arranged on the upper part of the circumference, and an arc-shaped grinding plate 103 fixedly arranged on the lower part of the circumference. Both ends of the grinding drum 1 are fixedly provided with support rings 105. Activity grooves 106 are opened on the circumferences of the support rings 105. Support seats 2 are arranged below the two support rings 105. Connecting plates 201 are fixedly arranged on the edges of the tops of the two support seats 2 close to each other. Support plates 202 are fixedly arranged at the four corners of the connecting plate 201. A support roller 203 is rotatably connected between the two support plates 202 at the short side of the top of one support plate 202. The two support rollers 203 above the same support plate 202 are movably connected to the lower part of the activity groove 106 on the same support ring 105 to support the grinding drum 1. A feeding cylinder 6 is movably connected to the activity hole 104 opened at one end of the grinding drum 1. An inlet pipe 604 is fixedly communicated with the upper part of the circumference outside the grinding drum 1. The top end of the inlet pipe 604 is communicated with the equipment for externally transporting recycled plastic materials. A support column 606 is fixedly arranged on the circumference of the feeding cylinder 6 below the inlet pipe 604. The bottom end of the support column 606 is fixed on one support seat 2. Both ends of the feeding cylinder 6 are closed. An inlet port 605 is opened on the lower part of the circumference of the feeding cylinder 6 located inside the grinding drum 1. A driving motor 601 is fixedly arranged at the end of the feeding cylinder 6 outside the grinding drum 1. The driving motor 601 drives an inner shaft 602 passing through one end of the feeding cylinder 6 and drives a spiral blade 603 to rotate. A servo motor 7 is arranged outside the end of the grinding drum 1 far from the feeding cylinder 6. A support column 703 is fixedly arranged at the bottom of the servo motor 7. The bottom end of the support column 703 is fixed on the support seat 2 far from the support column 606. The output end of the servo motor 7 is fixedly provided with a turning shaft 701, and the turning shaft 701 is fixedly penetrated at one end of the grinding drum 1. Two connecting rods 702 fixed to the grinding drum 1 are symmetrically fixedly arranged on the circumference of the turning shaft 701 inside the grinding drum 1. And a support column 703 is fixedly arranged at the bottom of the servo motor 7. The support column 703 is fixed on the top of the other support seat 2. A receiving frame 3 is movably connected to the lower part of the circumference of the grinding drum 1. Connecting strips 301 fixed to the two connecting plates 201 are fixedly arranged at both ends of the receiving frame 3. A collecting hopper 302 is fixedly communicated with the bottom of the receiving frame 3. And the output end of the collecting hopper 302 is fixedly communicated with a discharge square pipe 303. The bottom end of the discharge square pipe 303 is communicated with the pipeline for outputting the ground recycled plastic.

[0020] Specifically, during the operation, first, the feed pipe 604 conveys the recycled plastic materials to the feeding cylinder 6. By starting the driving motor 601, the inner shaft 602 is driven to rotate, and the spiral blade 603 is driven to rotate. During the rotation of the spiral blade 603, the materials entering the feeding cylinder 6 are conveyed to the feeding port 605 on the feeding cylinder 6 and fall into the grinding drum 1. (According to the material capacity, the feeding time is set to ten minutes. After the feeding is completed, the driving motor 601 stops working), and the grinding work is carried out. After grinding, the servo motor 7 is started to drive the turning shaft 701, the connecting rod 702 and the grinding drum 1 to turn over. At this time, the arc-shaped sieve plate 101 faces downward, and the arc-shaped grinding plate 103 is arranged upward. The arc-shaped sieve plate 101 is arranged in the receiving frame 3. When the grinding drum 1 turns over, the support ring 105 is in rolling cooperation with the support roller 203 through the movable groove 106. The support roller 203 is fixed on the support plate 202 of the connecting plate 201 to assist in supporting the grinding drum 1.

[0021] Further, during the operation, first, after the materials are input by the arc-shaped grinding plate 103 in the feeding cylinder 6, the materials are gathered on the arc-shaped grinding plate 103 and ground by the grinding assembly 4 for twenty minutes. After grinding for twenty minutes, the servo motor 7 can be started to drive the turning shaft 701 and the connecting rod 702 to drive the grinding drum 1 to turn over. During the turning over of the grinding drum 1, the ground recycled plastic particles in the grinding drum 1 fall on the arc-shaped sieve plate 101 and are gathered by the arc-shaped sieve plate 101 to screen the recycled plastic particles, so as to realize the grinding and screening of the recycled plastic in the grinding drum 1. Please refer to Figure 1 、 2 、5. On the basis of the first specific embodiment, in the grinding work, the grinding assembly 4 is arranged at the lower part inside the grinding drum 1. The driving motor 601 is fixed at one end of the grinding drum 1 far from the feeding cylinder 6. The output end of the driving motor 601 is fixed with a rotating shaft 402 that penetrates through one end of the grinding drum 1. And the end of the rotating shaft 402 far from the rotating motor 401 is rotationally connected to the inside of the grinding drum 1 below the feeding cylinder 6. And both ends of the rotating shaft 402 are fixed with turntables 403. The grinding rollers 404 are rotationally connected between the two turntables 403 in an annular array. The edges of the grinding rollers 404 extend out of the circumferential side of the turntables 403 and contact the arc-shaped grinding plate 103. The lowermost grinding roller 404 contacts the inner arc surface of the arc-shaped grinding plate 103 fixed at the lower part inside the grinding drum 1.

[0023] Specifically, during the grinding of the materials entering the grinding drum 1, the rotating motor 401 is started. The rotating motor 401 drives the rotating shaft 402, and the rotating shaft 402 drives the two turntables 403 to rotate. During the rotation of the two turntables 403, the grinding rollers 404 are driven to rotate in the grinding drum 1 and continuously roll over and press the recycled plastic raw materials on the arc-shaped grinding plate 103, so that the recycled plastic raw materials are fully ground.

[0024] Further, during the process of grinding and recycling plastic raw materials, after the recycled plastic raw materials are conveyed into the grinding drum 1, under the rotation of the grinding roller 404 driven by the rotation motor 401, the grinding roller 404 and the inner arc surface of the arc-shaped grinding plate 103 continuously grind, and the recycled plastic raw materials are fully ground. Please refer to Figure 1 , 2 , 4, 6. On the basis of the first specific embodiment and the second specific embodiment, the grinding drum 1 is turned over. At this time, the arc-shaped sieve plate 101 fixed in the grinding drum 1 is arranged at the lower part inside the grinding drum 1, the turning component 5 is arranged at the lower part inside the grinding drum 1, the rotation motor 501 is fixed at the end of the grinding drum 1, and the rotation motor 501 and the rotation motor 401 are symmetrically arranged at the end of the grinding drum 1. The rotating shaft 502 fixed at the output end of the rotation motor 501 passes through the end of the grinding drum 1 and is rotatably connected to the inner side wall of the grinding drum 1 outside the material conveying cylinder 6. The turning plates 503 are fixedly arranged in a circular array on the periphery of the rotating shaft 502 in the grinding drum 1. The turning plate 503 at the lowest position of the rotating shaft 502 contacts the inner arc surface of the arc-shaped sieve plate 101, and the material receiving frame 3.

[0026] Specifically, during the working process, the rotation motor 501 is started. The rotation motor 501 drives the rotating shaft 502 to drive the turning plate 503 to rotate, turning the particles of the recycled plastic after grinding collected on the arc-shaped sieve plate 101. The particles leak into the material receiving frame 3 through the sieve holes 102 on the arc-shaped sieve plate 101 and fall into the aggregate hopper 302 and are collected and conveyed into the discharge square pipe 303.

[0027] Further, after the rotation motor 501 drives the rotating shaft 502, when the rotating shaft 502 rotates and drives the turning plate 503 to turn the recycled plastic particles on the arc-shaped sieve plate 101, the recycled plastic particles ground to the qualified particle size are conveyed into the material receiving frame 3 through the sieve holes 102 on the arc-shaped sieve plate 101, and the unqualified particle size remains in the grinding drum 1. With the turning over of the grinding drum 1, it falls back onto the arc-shaped grinding plate 103 in the grinding drum 1 again and enters the next grinding cycle.

[0028] Please refer to Figures 1 - 10 , the present invention is a filtering and grinding device and method for recycled plastics, including the following steps: S1: First, start the servo motor 7 to drive the turning shaft 701 to rotate. After the turning shaft 701 rotates, drive the connecting rod 702 and the grinding drum 1 to rotate until the arc-shaped sieve plate 101 on the grinding drum 1 faces upward and the arc-shaped grinding plate 103 faces downward; S2: After setting the position of the grinding roller 1, start the driving motor 601 to drive the inner shaft 602 to rotate, driving the spiral blade 603 to rotate. At this time, the recycled plastic raw materials are conveyed in the feed pipe 604 to the material conveying cylinder 6. In the material conveying cylinder 6, driven by the rotation of the spiral blade 603, during the rotation of the spiral blade 603, the recycled plastic raw materials entering the material conveying cylinder 6 are driven into the feed port 605 and fall into the grinding roller 1, and gather on the arc-shaped grinding plate 103 at the lower part inside the grinding roller 1; S3: After feeding for ten minutes, stop the driving motor 601 to stop feeding, and start the rotation motor one 401 included in the grinding assembly 4. The rotation motor one 401 drives the rotating shaft one 402 to rotate, and during the rotation of the rotating shaft one 402, drives the two turntables 403 to rotate, driving the grinding roller 404 to roll. During the rolling of the grinding roller 404, grind the recycled plastic materials on the arc-shaped grinding plate 103; S4: Every twenty minutes after grinding the plastic materials, start the servo motor 7 to drive the turning shaft 701 and the connecting rod 702, driving the grinding roller 1 to turn over, so that the arc-shaped sieve plate 101 rotates to align with the receiving frame 3; S5: After the grinding roller 1 turns over, stop the rotation motor one 401. The ground recycled plastic raw materials gather inside the arc-shaped sieve plate 101 on the grinding roller 1, and start the rotation motor two 501 to drive the rotating shaft two 502 to rotate. During the rotation of the rotating shaft two 502, drive the turning plate 503 to rotate. During the rotation of the turning plate 503, turn over the ground recycled plastic raw material particles on the arc-shaped sieve plate 101, so that the recycled plastic raw material particles of appropriate size fall into the receiving frame 3; S6: The recycled plastic particles falling into the receiving frame 3 enter the aggregate hopper 302, and fall into the discharge square pipe 303 in the aggregate hopper 302. The bottom end of the discharge square pipe 303 is connected to an external receiving device, and is output to the external receiving device in the discharge square pipe 303; S7: After starting the rotation motor two 501 to drive the rotating shaft two 502 to rotate and driving the turning plate 503 to rotate for five minutes, restart the servo motor 7 to reverse, driving the grinding roller 1 to turn back to its original position. The unqualified plastic blocks after screening fall back onto the arc-shaped grinding plate 103 again. Stop the rotation motor two 501 from driving the rotating shaft two 502 to rotate, and start the driving motor 601 to drive the inner shaft 602 to drive the spiral blade 603 to feed again, so that the materials are conveyed into the grinding roller 1 to perform the next working cycle.

[0029] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0030] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. Filtering and grinding apparatus for the production of recycled plastics, comprising: A grinding drum (1), wherein an upper portion of a circumferential side of the grinding drum (1) penetrates a fixed arc-shaped screen plate (101), and a lower portion of a circumferential side of the grinding drum (1) penetrates a fixed arc-shaped grinding plate (103); Support rings (105) are fixed at both ends of the grinding drum (1), and movable grooves (106) are provided on the circumference of the support rings (105); Support seats (2), with connecting plates (201) fixed to the edges of the tops of the two support seats (2) that are close to each other; A material receiving frame (3), wherein the material receiving frame (3) is arranged to be through-connected from top to bottom, and connecting strips (301) are fixed at both ends of the material receiving frame (3); The grinding assembly (4) comprises a rotating motor (401) fixed to one end of the grinding drum (1), wherein a rotating shaft (402) is fixed to the output end of the rotating motor (401); The turning assembly (5) comprises a second rotating motor (501) fixed to one end of the grinding drum (1) and disposed below the first rotating motor (401); A servo motor (7), wherein an output end of the servo motor (7) is fixed with a flip shaft (701) that passes through and is fixed to one end of the grinding drum (1).

2. The filtering and grinding device for recycling plastics according to claim 1, characterized in that: Both ends of the grinding drum (1) are closed, the central axis of the grinding drum (1) is horizontally arranged, and the two support seats (2) are arranged below the support ring (105) and symmetrically arranged below the grinding drum (1), and a movable groove (106) is opened on the circumference of each support ring (105), and vertical sieve holes (102) are evenly opened in the arc-shaped screen plate (101).

3. The filtering and grinding device for recycling plastics according to claim 2, characterized in that: The two connecting strips (301) are respectively fixed to the two connecting plates (201); support plates (202) are fixed to the four corners of the top of each connecting plate (201); the upper parts between the two supporting plates (202) located at the same short side of the top of the same connecting plate (201) are both rotatably connected to support rollers (203); the two supporting rollers (203) above the same connecting plate (201) are both movably connected to the movable groove (106) on the same supporting ring (105), and can roll relative to the supporting ring (105).

4. The filtering and grinding device for recycling plastics according to claim 1, characterized in that: The bottom of the material receiving frame (3) is fixedly connected to a material collecting hopper (302) for collecting materials, and the output end of the material collecting hopper (302) is fixedly connected to a material discharging square pipe (303) for discharging recycled plastics. The material receiving frame (3) is movably connected to the lower part of the peripheral side of the grinding drum (1).

5. The filtering and grinding device for recycling plastics according to claim 1, characterized in that: The grinding assembly (4) comprises a rotating disk (403) and a grinding roller (404); the rotating shaft (402) passes through one end of the grinding drum (1) and is rotatably connected to a side of the inner wall of the grinding drum (1) away from the rotating motor (401); the rotating shaft (402) is arranged inside the grinding drum (1) and is fixed with a rotating disk (403) at two edges of the circumference thereof; the edges between the two rotating disks (403) are rotatably connected with grinding rollers (404) for grinding recycled plastics in a circular array; the edges of the grinding rollers (404) extend out of the circumference of the rotating disk (403), and the grinding roller (404) located at the bottom contacts the arc-shaped grinding plate (103) inside the grinding drum (1) during rotation.

6. The filtering and grinding device for recycling plastics according to claim 1, characterized in that: The flip assembly (5) further comprises a second rotating shaft (502) and a flip plate (503); the output end of the second rotating motor (501) is fixed with a second rotating shaft (502) passing through one end of the grinding drum (1); the flip plates (503) are fixed in a circular array around the second rotating shaft (502) in the grinding drum (1); the end of the second rotating shaft (502) away from the second rotating motor (501) is rotatably connected to a surface of the inner wall of the grinding drum (1) away from the second rotating motor (501); and the top of the flip plate (503) located at the top contacts the inner upper part of the arc-shaped screen plate (101).

7. The filtering and grinding device for recycling plastics according to claim 1, characterized in that: A movable hole (104) is provided in the center of one end of the grinding drum (1) away from the servo motor (7), and a feed barrel (6) is movably connected to the movable hole (104). A driving motor (601) is fixed to the end of the feed barrel (6) away from the grinding drum (1), and an inner shaft (602) passing through one end of the feed barrel (6) is fixed to the output end of the driving motor (601). A spiral blade (603) for spirally conveying recycled plastic materials is fixed to the circumferential side of the inner shaft (602) in the feed barrel (6), and the spiral blade (603) is movably connected to the feed barrel (6).

8. The filtering and grinding device for recycling plastics according to claim 7, characterized in that: A feed pipe (604) is fixedly connected to the upper part of the peripheral side of the feed cylinder (6) outside the grinding drum (1), and the top end of the feed pipe (604) is connected to a conveying device for conveying recycled plastic raw materials that need to be ground. A feed port (605) is fixedly connected to the lower part of the peripheral side of the feed cylinder (6) inside the grinding drum (1), and a support column (606) is fixedly connected to the lower part of the peripheral side of the feed cylinder (6) outside the grinding drum (1).

9. The filtering and grinding device for recycling plastics according to claim 8, characterized in that: A second support column (703) is fixed at the bottom of the servo motor (7), and the bottom ends of the first support column (606) and the second support column (703) are respectively fixed to the tops of the two support seats (2). Two connecting rods (702) are symmetrically fixed around the flip shaft (701) in the grinding roller (1), and one end of each connecting rod (702) away from the flip shaft (701) is fixed to the inner wall of the grinding roller (1).

10. A filtering and grinding method for recycling plastics, applied to a filtering and grinding device for recycling plastics according to any one of claims 1 to 9, characterized in that: The steps include: First, the servo motor (7) is started to drive the flip shaft (701) to rotate. After the flip shaft (701) rotates, the connecting rod (702) and the grinding drum (1) are driven to rotate until the arc-shaped screen plate (101) on the grinding drum (1) faces upward and the arc-shaped grinding plate (103) faces downward. After the position of the grinding drum (1) is set, the driving motor (601) is started to drive the inner shaft (602) to rotate, thereby driving the spiral blade (603) to rotate. At this time, the recycled plastic raw material is transported from the feeding pipe (604) to the feeding barrel (6), and the spiral blade (603) rotates in the feeding barrel (6). During the rotation process, the spiral blade (603) drives the recycled plastic raw material entering the feeding barrel (6) to the feeding port (605), and falls into the grinding drum (1), and is collected on the arc-shaped grinding plate (103) at the lower part of the grinding drum (1); After feeding for ten minutes, the driving motor (601) is stopped, feeding is stopped, and the rotating motor (401) included in the grinding assembly (4) is started. The rotating motor (401) drives the rotating shaft (402) to rotate. When the rotating shaft (402) rotates, the two rotating disks (403) are driven to rotate, and the grinding roller (404) is driven to roll. When the grinding roller (404) rolls, the recycled plastic material on the arc-shaped grinding plate (103) is ground; After grinding the plastic material for every twenty minutes, the servo motor (7) is started to drive the turning shaft (701) and the connecting rod (702), thereby causing the grinding drum (1) to turn over, so that the arc-shaped screen plate (101) rotates to align with the material receiving frame (3); After the grinding drum (1) is turned over, the first rotating motor (401) is stopped, the ground recycled plastic raw materials are collected on the inner side of the arc-shaped screen plate (101) on the grinding drum (1), and the second rotating motor (501) is started to drive the second rotating shaft (502) to rotate. When the second rotating shaft (502) rotates, the flip plate (503) is driven to rotate. When the flip plate (503) rotates, the ground recycled plastic raw material particles on the arc-shaped screen plate (101) are flipped, so that the recycled plastic raw material particles of appropriate size fall into the receiving frame (3); The recycled plastic particles that fall into the material receiving frame (3) enter the collecting hopper (302), and fall into the discharging square pipe (303) in the collecting hopper (302). The bottom end of the discharging square pipe (303) is connected to an external material receiving device, and are output in the discharging square pipe (303) to the external material receiving device; The second rotating motor (501) is started to drive the second rotating shaft (502) to rotate, and the flip plate (503) is driven to rotate for five minutes. The servo motor (7) is restarted to reverse and drive the grinding drum (1) to flip back to the original position. The screened unqualified plastic blocks fall back onto the arc-shaped grinding plate (103). The second rotating motor (501) is stopped to drive the second rotating shaft (502) to rotate, and the driving motor (601) is started to drive the inner shaft (602) again to drive the spiral blade (603) to feed the material, so that the material is transported to the grinding drum (1) to carry out the next working cycle.

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