Plastic particle screening mechanism for plastic products

Abstract

The application relates to the technical field of plastic recycling treatment equipment, in particular to a plastic particle screening mechanism for plastic products, which comprises a first rack, a pulverizer and a magnetic separation mechanism are fixedly arranged on the first rack; a first conveying belt is arranged on the first rack, one end of the first conveying belt is located below a discharge port of the pulverizer, and the other end of the first conveying belt is located below the magnetic separation mechanism; a first scraper is arranged on the first rack, a material channel is formed between the lower end surface of the first scraper and the upper end surface of the upper ring of the first conveying belt; a vibration assembly and a lifting assembly are further fixedly arranged on the first rack; the lifting assembly can make the material on the first conveying belt closer to the magnetic separation mechanism. The application can control the material thickness through the first scraper, disperse the material through the vibration assembly, lift the material through the lifting assembly, and cooperate with the magnetic separation mechanism, so that the iron metal pieces in the plastic particles can be effectively separated, and the screening process is efficient and orderly through the cooperation of the assemblies.

Description

Technical Field

[0001] This application relates to the technical field of plastic recycling equipment, and in particular to a plastic pellet screening mechanism for plastic products. Background Technology

[0002] The production of plastic products generates a large amount of injection molding waste, which often contains embedded ferrous metal parts (such as screws, nuts, and metal inserts). To achieve resource recycling, this injection molding waste needs to be processed, and effectively separating the ferrous metal parts is a key step in improving the quality and efficiency of plastic recycling. Traditional manual sorting methods are extremely inefficient and labor-intensive, making them unsuitable for large-scale recycling. Magnetic separation equipment often suffers from reduced efficiency due to the excessive thickness of the injection molding waste.

[0003] A search revealed that Chinese Patent Publication No. CN222987352U discloses a magnetic separation mechanism for a magnetic separator of recycled plastic granules, comprising a body on which a magnetic separator is mounted. The magnetic separator has a discharge port on one side and a motor on the left side. A feeding bin is installed at the discharge port, and rectangular grooves are provided on both sides of the feeding bin.

[0004] Regarding the aforementioned related technologies, the inventors have discovered the following drawbacks: In the prior art, when the thickness of the injection molding waste is relatively thick, the bottom layer of material is affected by the stacking of the upper layer, making it difficult to magnetically separate ferrous metal parts in the bottom layer. To solve the technical problem of the difficulty in magnetically separating ferrous metal parts in the bottom layer of thick injection molding waste in the prior art, this application solves this problem by setting a first scraper to control the material thickness, a vibration component to disperse the material, and a lifting component to lift the material in conjunction with the magnetic separation mechanism. This achieves the technical effect of enhancing the magnetic separation effect and effectively separating ferrous metal parts from plastic particles. Utility Model Content

[0005] To improve the magnetic separation efficiency of injection molding waste, this application provides a plastic particle screening mechanism for plastic products.

[0006] This application provides a plastic granule screening mechanism for plastic products, employing the following technical solution: It includes a first frame, on which a crusher and a magnetic separator are fixedly mounted; a first conveyor belt is mounted on the first frame, one end of which is located below the discharge port of the crusher, and the other end is located below the magnetic separator; a first scraper is mounted on the first frame, with its lower end face forming a material channel with the upper end face of the upper ring of the first conveyor belt; a vibration assembly and a lifting assembly are also fixedly mounted on the first frame; the lifting assembly allows the material on the first conveyor belt to be closer to the magnetic separator. The first scraper controls the material thickness, the vibration assembly disperses the material, and the lifting assembly lifts the material, working in conjunction with the magnetic separator to effectively separate ferrous metal parts from the plastic granules.

[0007] Optionally, the lifting assembly includes a first rotating rod rotatably connected to the first frame; the peripheral wall of the first rotating rod is uniformly provided with a plurality of second scrapers extending in the axial direction, and the lower end face of the second scraper located at the lowermost part of the first rotating rod can abut against the upper end face of the upper ring of the first conveyor belt; each second scraper forms a material placement trough.

[0008] Optionally, a first motor is fixedly mounted on the first frame, and the output shaft of the first motor is coaxially and fixedly connected to the first rotating rod.

[0009] Optionally, the vibration assembly includes a second rotating rod rotatably connected to the first frame, the peripheral wall of the second rotating rod abutting against the lower end face of the upper ring of the first conveyor belt; the second rotating rod has multiple axial cavities along the axial direction, and each axial cavity contains multiple steel balls.

[0010] Optionally, the magnetic separation mechanism includes a second frame fixedly mounted on a first frame; a second conveyor belt fixedly mounted on the second frame; and a second magnetic plate fixedly mounted on the second frame, the second magnetic plate being located in the space between the upper and lower layers of the second conveyor belt.

[0011] Optionally, the second conveyor belt is located above the first conveyor belt, the conveying direction of the first conveyor belt is perpendicular to the conveying direction of the second conveyor belt, and the length of the second conveyor belt is greater than the width of the first conveyor belt; the width of the second magnetic plate is adapted to the width of the second conveyor belt, and the length of the second magnetic plate is less than the length of the second conveyor belt.

[0012] Optionally, a second motor for driving the second conveyor belt is fixedly installed on the second frame.

[0013] Optionally, a third motor capable of driving the first conveyor belt is fixedly installed on the first frame; a third rotating rod driven by the third motor is rotatably connected to the first frame, the third rotating rod has a first groove on its peripheral wall, and the second rotating rod has a second groove on its peripheral wall; the same transmission belt is fitted onto the first groove and the second groove.

[0014] In summary, this application includes the following beneficial technical effects: 1. This utility model controls the material thickness using a first scraper to prevent excessive stacking, thus ensuring that the bottom layer of material is magnetically separated. The lifting assembly uses a second scraper on the first rotating rod to scrape the material from the first conveyor belt into the material placement trough and lifts it upwards with rotation. This brings the material closer to the magnetic separation mechanism during transport, enhancing the magnetic separation mechanism's adsorption capacity for ferrous metal parts in the material. This effectively solves the problem of insufficient magnetic force due to the material's low position, thus improving the separation efficiency of ferrous impurities.

[0015] 2. The vibration component of this utility model generates irregular micro-vibrations by the rolling and collision of steel balls in the axial cavity inside the second rotating rod during rotation. This vibration is transmitted to the first conveyor belt, which enables the material on the conveyor belt to be evenly dispersed under the action of vibration, avoiding material aggregation and allowing more material to come into contact with the magnetic force range of the magnetic separation mechanism, thereby improving the sufficiency of magnetic separation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application; Figure 2 This is a schematic diagram of the position and structure of the second magnetic plate in an embodiment of this application; Figure 3 This is a schematic diagram of the lifting component in an embodiment of this application; Figure 4 This is a cross-sectional structural diagram of the second rotating rod in an embodiment of this application.

[0017] Reference numerals: 1. First frame; 2. Crusher; 3. Magnetic separation mechanism; 4. First conveyor belt; 5. First scraper; 6. Vibration assembly; 7. Lifting assembly; 71. First rotating rod; 72. Second scraper; 73. Placement trough; 8. First motor; 9. Second rotating rod; 91. Axial cavity; 92. Steel ball; 10. Second frame; 11. Second conveyor belt; 12. Second magnetic plate; 13. Second motor; 14. Third motor; 15. Third rotating rod; 16. Belt. Detailed Implementation

[0018] The following is in conjunction with the appendix Figures 1-4This application will be further described in detail below. The technical solutions in the embodiments of this application will be clearly described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0019] Example 1: This embodiment discloses a plastic particle screening mechanism for plastic products, used to screen and remove impurities from plastic particles containing metal impurities.

[0020] like Figure 1 As shown, it includes a first frame 1, on which a crusher 2 and a magnetic separation mechanism 3 are fixedly mounted; the crusher 2 is used to crush large plastic products into plastic granules, and its discharge port is directly opposite the first conveyor belt 4 below it. The first conveyor belt 4 is rotatably connected to the first frame 1, with one end located directly below the discharge port of the crusher 2 and the other end extending to the bottom of the magnetic separation mechanism 3, for conveying the crushed plastic granules to the magnetic separation mechanism 3; To prevent plastic particles from accumulating too thickly on the first conveyor belt 4, a first scraper 5 is also fixedly installed on the first frame 1. A gap of 5-10mm is reserved between the lower end face of the first scraper 5 and the upper end face of the upper ring of the first conveyor belt 4 to form a material channel for the plastic particles to pass through, so that the material thickness on the first conveyor belt 4 is kept uniform and the problem of insufficient magnetic separation caused by stacking is reduced.

[0021] The first frame 1 is also equipped with a vibration assembly 6 and a lifting assembly 7. The vibration assembly 6 (which can be a vibrating plate driven by an existing vibration motor) can make the material on the first conveyor belt 4 more dispersed, while the lifting assembly 7 can lift the material on the first conveyor belt 4 upwards, making it closer to the magnetic separation mechanism 3, thereby enhancing the magnetic separation effect.

[0022] In this embodiment, the specific structure of the lifting component 7 includes a first rotating rod 71 rotatably connected to the first frame 1 via a bearing. The axial direction of the first rotating rod 71 is consistent with the width direction of the first conveyor belt 4. Multiple second scrapers 72 extending axially are integrally formed on the peripheral wall of the first rotating rod 71, and a material placement groove 73 is formed between adjacent second scrapers 72. The lower end face of the second scraper 72 located at the lowermost part of the first rotating rod 71 can abut against the upper end face of the upper ring of the first conveyor belt 4. When the first rotating rod 71 rotates, the second scraper 72 can scrape the plastic particles on the first conveyor belt 4 into the material placement groove 73 and lift them upward with the rotation, so that the material is closer to the magnetic separation mechanism 3 during the conveying process. To drive the first rotating rod 71 to rotate, a first motor 8 is fixed to the first frame 1 by bolts. The output shaft of the first motor 8 is coaxially fixedly connected to the first rotating rod 71 by a coupling. The material lifting frequency can be adjusted by controlling the speed of the first motor 8.

[0023] The magnetic separation mechanism 3 includes a second frame 10 fixed to the first frame 1 by bolts. A second conveyor belt 11 is rotatably connected to the second frame 10, and a second motor 13 for driving the second conveyor belt 11 is fixed to the second frame 10 by bolts. A second magnetic plate 12 is also fixed inside the second frame 10 by bolts. The second magnetic plate 12 can be a strong magnetic plate. The second magnetic plate 12 is located in the space between the upper and lower rings of the second conveyor belt 11 and can generate an adsorption force on iron-containing impurities on the second conveyor belt 11.

[0024] The second conveyor belt 11 is located above the first conveyor belt 4. The conveying direction of the first conveyor belt 4 is perpendicular to the conveying direction of the second conveyor belt 11. The length of the second conveyor belt 11 is greater than the width of the first conveyor belt 4. The width of the second magnetic plate 12 is the same as the width of the second conveyor belt 11. The length of the second magnetic plate 12 is less than the length of the second conveyor belt 11. When the first conveyor belt 4 transports iron-containing impurities to the area below the second conveyor belt 11, the adsorption force of the second magnetic plate 12 adsorbs the iron-containing impurities to the lower ring of the second conveyor belt 11. As the second conveyor belt 11 rotates, since the length of the second magnetic plate 12 is less than the length of the second conveyor belt 11, the impurities on the second conveyor belt 11 will gradually break away from the attraction of the second magnetic plate 12 and fall off.

[0025] Example 2: The difference between this embodiment and Embodiment 1 is that the structure of the vibration component 6 is different, while the rest of the structure is the same.

[0026] The vibration component 6 in this embodiment includes a second rotating rod 9 that is rotatably connected to the first frame 1 via a bearing. The axial direction of the second rotating rod 9 is consistent with the width direction of the first conveyor belt 4. The peripheral wall of the second rotating rod 9 abuts against the lower end face of the upper ring of the first conveyor belt 4. Multiple axial cavities 91 are opened in the second rotating rod 9 along the axial direction, and multiple steel balls 92 are placed in each axial cavity 91. A third motor 14 is also fixed to the first frame 1 by bolts. The output shaft of the third motor 14 drives the third rotating rod 15 to rotate (the third rotating rod 15 is the drive roller of the first conveyor belt 4). The third rotating rod 15 has a first belt groove on its peripheral wall, and the second rotating rod 9 has a second belt groove on its peripheral wall. The same transmission belt 16 is fitted in the two belt grooves so that the second rotating rod 9 and the first conveyor belt 4 operate synchronously. When the first conveyor belt 4 is running, it will drive the second rotating rod 9 to rotate synchronously. At this time, the steel balls 92 in the axial cavity 91 will roll and collide in the cavity due to centrifugal force and gravity, causing the second rotating rod 9 to generate irregular micro vibrations. This vibration is transmitted to the first conveyor belt 4, which will cause the material on the first conveyor belt 4 to be evenly dispersed under the action of vibration, thereby achieving the purpose of enhancing the magnetic separation effect.

[0027] Working principle: The plastic products to be processed are fed into the crusher 2 and crushed into plastic granules, which then fall from the discharge port into the first conveyor belt 4. The first conveyor belt 4 is driven by the third motor 14. When the plastic granules pass through the lower space of the first scraper 5, they are organized into a thinner material layer. When the first conveyor belt 4 is running, it will drive the second rotating rod 9 to rotate synchronously. At this time, the steel balls 92 in the axial cavity 91 will roll and collide in the cavity due to centrifugal force and gravity, causing the second rotating rod 9 to generate irregular micro vibrations. This vibration is transmitted to the first conveyor belt 4, which will cause the material on the first conveyor belt 4 to be evenly dispersed under the action of vibration, thereby achieving the purpose of enhancing the magnetic separation effect. The first motor 8 drives the first rotating rod 71 to rotate, and the second scraper 72 scrapes the plastic particles in the material layer into the material placement trough 73, and lifts them upward as they rotate, so that the material is closer to the magnetic separation mechanism 3. Iron impurities are conveyed along the first conveyor belt 4 to the lower part of the second conveyor belt 11. The second conveyor belt 11 is driven by the second motor 13 (the conveying direction is perpendicular to the first conveyor belt 4). When the material passes under the second magnetic plate 12, the iron impurities are adsorbed by the second magnetic plate 12 into the lower ring of the second conveyor belt 11. When the second conveyor belt 11, which has adsorbed iron impurities, moves to the area where it is detached from the second magnetic plate 12, the impurities lose their magnetic attraction and fall off the surface of the second conveyor belt 11 (a collection box can be set below); while the pure plastic particles are transported to the end for collection by the first conveyor belt 4.

[0028] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A plastic granule screening mechanism for plastic products, comprising a first frame, characterized in that: A crusher and a magnetic separator are fixedly mounted on the first frame; a first conveyor belt is mounted on the first frame, with one end of the first conveyor belt located below the discharge port of the crusher and the other end located below the magnetic separator; a first scraper is mounted on the first frame, and a material channel is formed between the lower end face of the first scraper and the upper end face of the upper ring of the first conveyor belt; a vibration assembly and a lifting assembly are also fixedly mounted on the first frame; the lifting assembly enables the material on the first conveyor belt to be closer to the magnetic separator.

2. The plastic granule screening mechanism for plastic products according to claim 1, characterized in that: The lifting assembly includes a first rotating rod rotatably connected to the first frame; the peripheral wall of the first rotating rod is uniformly provided with a plurality of second scrapers extending in the axial direction, and the lower end face of the second scraper located at the lowermost part of the first rotating rod can abut against the upper end face of the upper ring of the first conveyor belt; each second scraper forms a material placement trough.

3. The plastic granule screening mechanism for plastic products according to claim 1, characterized in that: A first motor is fixedly mounted on the first frame, and the output shaft of the first motor is coaxially and fixedly connected to the first rotating rod.

4. The plastic granule screening mechanism for plastic products according to claim 1, characterized in that: The vibration assembly includes a second rotating rod rotatably connected to the first frame, the peripheral wall of the second rotating rod abutting against the lower end face of the upper ring of the first conveyor belt; the second rotating rod has multiple axial cavities along the axial direction, and each axial cavity contains multiple steel balls.

5. The plastic granule screening mechanism for plastic products according to claim 1, characterized in that: The magnetic separation mechanism includes a second frame fixedly mounted on a first frame; a second conveyor belt fixedly mounted on the second frame; and a second magnetic plate fixedly mounted on the second frame, the second magnetic plate being located in the space between the upper and lower layers of the second conveyor belt.

6. The plastic granule screening mechanism for plastic products according to claim 5, characterized in that: The second conveyor belt is located above the first conveyor belt, and the conveying direction of the first conveyor belt is perpendicular to the conveying direction of the second conveyor belt. The length of the second conveyor belt is greater than the width of the first conveyor belt. The width of the second magnetic plate is matched with the width of the second conveyor belt, and the length of the second magnetic plate is less than the length of the second conveyor belt.

7. A plastic granule screening mechanism for plastic products according to claim 5, characterized in that: A second motor that drives the second conveyor belt is fixedly installed on the second frame.

8. The plastic granule screening mechanism for plastic products according to claim 1, characterized in that: A third motor capable of driving the first conveyor belt is fixedly installed on the first frame; a third rotating rod driven by the third motor is rotatably connected to the first frame, the third rotating rod has a first groove on its peripheral wall, and the second rotating rod has a second groove on its peripheral wall; the same transmission belt is fitted onto the first groove and the second groove.

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