A plastic particle screening device

Abstract

A plastic particle screening device is used to solve the technical problem that the existing plastic particle screening device mentioned in the background art adopts a single-layer screen design and cannot screen plastic particles of different sizes, causing difficulty in classifying the particle specifications after screening the plastic particles, comprising a box, a feed inlet is formed on the top of the box, a first discharge outlet and a second discharge outlet are formed on the outer side wall of the box, a first screening net is arranged in the box, the first screening net is located below the feed inlet, and one end of the first screening net slides through the first discharge outlet and extends outward, a second screening net is arranged in the box, the second screening net is located below the first screening net, and one end of the second screening net slides through the second discharge outlet and extends outward, a moving assembly for reciprocating driving the first screening net to move is arranged in the box, a shaking assembly for shaking the second screening net is arranged in the box, and a driving assembly for synchronously driving the moving assembly and the shaking assembly is arranged on the box.

Description

Technical Field

[0001] This utility model relates to the field of plastic screening and processing technology, specifically to a plastic particle screening device. Background Technology

[0002] Phenolic recycled plastic pellets refer to granular materials made from waste phenolic plastic as raw material, which undergo multiple processes such as high-temperature treatment, crushing, washing, and dust removal, and then manufacturing processes such as extrusion, separation, and drying. Screening devices are required in the crushing operation to screen the crushed raw materials.

[0003] A prior art plastic particle screening device, such as the invention patent document with authorization announcement number "CN223199331U" and patent name "A Plastic Raw Material Screening Device", discloses a plastic particle screening device, including a screening box. The upper surface of the screening box has a feed inlet. The front surface of the screening box is detachably connected to an observation door. The upper part of the right surface of the inner wall of the screening box is provided with a screening component. The screening component includes a mounting frame. The left end of the inner wall of the mounting frame is fixedly connected to a telescopic rod. The outer wall of the telescopic end of the telescopic rod is sleeved with a spring. The right end of the telescopic rod is fixedly connected to a screening plate. The right end of the screening plate is fixedly connected to a stop block.

[0004] The aforementioned patent document uses a single-layer screen design, which cannot screen plastic particles of different sizes, making it difficult to classify the particle size after screening. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by proposing a plastic particle screening device. This device solves the technical problem mentioned in the background art, where the existing plastic particle screening device uses a single-layer screen design, which cannot screen plastic particles of different sizes, resulting in difficulties in classifying the particle size after screening.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: It includes a housing, with a feed inlet at the top and a first and second discharge outlets on the outer side wall of the housing. A first screening screen is provided inside the housing, located below the feed inlet with one end sliding through the first discharge outlet and extending outwards. A second screening screen is provided inside the housing, located below the first screening screen with one end sliding through the second discharge outlet and extending outwards. A moving component for reciprocatingly driving the first screening screen is provided inside the housing. An oscillating component for oscillating the second screening screen is provided inside the housing. A driving component for synchronously driving the moving component and the oscillating component is provided on the housing.

[0007] Working principle:

[0008] Plastic particles to be screened are fed into the inlet at the top of the box and first fall onto the first screening screen. Driven by the reciprocating motion of the moving component, the first screening screen moves horizontally. This motion allows particles smaller than the mesh size of the first screening screen to pass through and fall, while larger particles that fail to pass through are conveyed along the screen surface and discharged from the box through the first outlet, completing the first screening and separation of coarse particles. Smaller particles that pass through the first screening screen fall onto the second screening screen. Driven by the oscillating component, the second screening screen oscillates. This motion allows the finest particles smaller than the mesh size of the second screening screen to pass through the screen and fall to the bottom of the box for collection. At the same time, particles of intermediate size that meet the specifications of the second screening screen are conveyed along the screen surface and discharged from the box through the second outlet, completing the second screening and separation. Throughout the screening process, the driving component synchronously drives the moving component and the oscillating component to ensure that the reciprocating motion of the first screening and the oscillation action of the second screening are coordinated and continuous.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] First, by setting up a first screening screen and a second screening screen with different mesh sizes arranged vertically, plastic particles can be effectively divided into three categories according to particle size: large particles that fail to pass through the first screening screen, medium-sized particles that remain on the second screening screen, and the smallest particles that pass through the second screening screen, thereby improving screening accuracy and efficiency.

[0011] Secondly, one end of the first screening screen and the second screening screen extend to the first discharge port and the second discharge port respectively, and automatically transports the screened material to the outside of the box during the movement. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0013] Figure 2 for Figure 1 A magnified cross-sectional view of the structure at point A.

[0014] Explanation of reference numerals in the attached drawings: 1. Box body; 2. Inlet; 3. First outlet; 4. Second outlet; 5. First screen; 6. Second screen; 7. Guide rod; 8. First rotating shaft; 9. First cam; 10. Fixed rod; 11. First rotating block; 12. Moving frame; 13. Slider; 14. Strip hole; 15. Mounting block; 16. Mounting rod; 17. Spring; 18. Second rotating shaft; 19. Second cam; 20. Mounting plate; 21. Motor; 22. First sprocket; 23. Second sprocket; 24. Chain; 25. Guide plate. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0016] Example:

[0017] like Figure 1 and Figure 2 As shown, a plastic particle screening device includes a housing 1. The top of the housing 1 has an inlet 2, and the outer side wall of the housing 1 has a first outlet 3 and a second outlet 4. A first screening screen 5 is disposed inside the housing 1. A moving assembly for reciprocatingly driving the first screening screen 5 is also disposed inside the housing 1. Two parallel guide rods 7 are fixed inside the housing 1. The two ends of the first screening screen 5 are slidably mounted on the two guide rods 7, which provide a track for the first screening screen 5, ensuring that it can only perform stable horizontal reciprocating movement. The moving assembly includes a first rotating shaft 8, a first cam 9, a fixed rod 10, a first rotating block 11, a moving frame 12, and a slider 13. The first rotating shaft 8 is rotatably mounted on the housing 1, the first cam 9 is fixed on the first rotating shaft 8, the fixed rod 10 is fixed on the first cam 9, and the first rotating block 11 is rotatably mounted on the housing 1. A strip-shaped hole 14 is provided on the inner wall of the first rotating block 11. The fixed rod 10 is slidably disposed in the strip-shaped hole 14. The movable frame 12 is fixedly disposed at the bottom of the first screening screen 5. The slider 13 is slidably disposed on the movable frame 12 and is rotatably connected to the first rotating block 11. The first screening screen 5 is located below the feed inlet 2 and one end of the first screening screen 5 slides through the first discharge outlet 3 and extends outward. The motor 21 drives the first rotating shaft 8 to rotate, which drives the first cam 9 on it to rotate. The fixed rod 10 fixed on the cam moves in a circular motion with the cam. The fixed rod 10 is nested in the strip-shaped hole 14 of the first rotating block 11, which converts the circular motion into the reciprocating oscillation of the first rotating block 11. The first rotating block 11 is connected to the movable frame 12 fixed at the bottom of the first screening screen 5 through the slider 13, thereby further converting the oscillation into the horizontal reciprocating linear motion of the movable frame 12 and the first screening screen 5.

[0018] like Figure 1As shown, the housing 1 contains a second screening screen 6, which is located below the first screening screen 5, with one end of the second screening screen 6 sliding through the second discharge port 4 and extending outward. The housing 1 contains a vibration assembly for vibrating the second screening screen 6. The vibration assembly includes a mounting block 15, a mounting rod 16, a spring 17, a second rotating shaft 18, a second cam 19, and a mounting plate 20. The mounting block 15 is fixed inside the housing 1, and the mounting rod 16 is fixed to the mounting block 15. One end of the second screening screen 6 is slidably mounted on the mounting rod 16. The spring 17 is sleeved on the mounting rod 16, and both ends of the spring 17 are fixed to the mounting block 15 and the second screening screen 6, respectively. The second rotating shaft 18... The second cam 19 is fixed on the second rotating shaft 18 and the mounting plate 20 is fixed on the second screening screen 6 and abuts against the second cam 19. The second rotating shaft 18 drives the second cam 19 to rotate continuously. The protrusion of the rotating second cam 19 periodically hits and pushes the mounting plate 20 installed on the second screening screen 6. The impact force causes the second screening screen 6 to overcome the elastic force of the spring 17 and slide to one side along the mounting rod 16. When the protrusion of the cam passes the highest point, the restoring force of the spring 17 pulls the second screening screen 6 to quickly return to its original position. The cam rotates continuously. The above-mentioned impact-compression of the spring 17-return process repeats itself, thereby forming an oscillation of the second screening screen 6.

[0019] like Figure 1 and Figure 2 As shown, the housing 1 is equipped with a drive assembly for synchronously driving the moving component and the oscillation component. The drive assembly includes a motor 21, a first sprocket 22, a second sprocket 23, and a chain 24. The motor 21 is fixed to the housing 1 and its output end is fixedly connected to the first rotating shaft 8. The first sprocket 22 is fixed to the first rotating shaft 8, and the second sprocket 23 is fixed to the second rotating shaft 18. The chain 24 is sleeved on the first sprocket 22 and the second sprocket 23. When the motor 21 starts, it directly drives the first rotating shaft 8 to rotate. The first sprocket 22, fixed to the first rotating shaft 8, drives the second sprocket 23, fixed to the second rotating shaft 18, through the chain 24, thereby synchronously transmitting power to the second rotating shaft 18.

[0020] like Figure 1 As shown, a guide plate 25 is provided below the first screening screen 5 to guide plastic particles to fall onto the second screening screen 6. Particles that fall from the first screening screen 5 fall onto the inclined guide plate 25 and slide down the plate surface, and are concentrated and guided to the designated area of ​​the second screening screen 6.

[0021] Working principle:

[0022] Motor 21 starts, and synchronously drives the first rotating shaft 8 and the second rotating shaft 18 to rotate via chain 24, first sprocket 22, and second sprocket 23. The first rotating shaft 8 drives the first cam 9 to rotate. Through the mechanism composed of fixed rod 10 and first rotating block 11 with strip-shaped hole 14, the rotational motion is converted into reciprocating oscillation. Then, via slider 13 and moving frame 12, the first screening screen 5 is driven to make a stable horizontal reciprocating motion along guide rod 7. The mixed plastic particles added from feed port 2 first fall onto the first screening screen 5. During this process, particles smaller than the mesh size of the first screen are screened out and fall onto the guide plate 25 below. Larger particles that cannot be screened out are continuously conveyed by the reciprocating motion of the screen and eventually pass through it. One end extending from the first discharge port 3 is automatically discharged from the box 1. Particles passing through the first screening screen 5 are concentrated and guided by the guide plate 25 and fall evenly onto the second screening screen 6. At this time, the synchronously rotating second rotating shaft 18 drives the second cam 19 on it to rotate continuously. The cam periodically strikes the mounting plate 20 fixed to the second screening screen 6, causing the screen to compress the spring 17 and vibrate along the mounting rod 16. This vibration causes the finest particles smaller than its mesh to be screened out and fall into the bottom of the box 1 for collection. On the other hand, it transports the medium-sized particles that meet the specifications to the end extending from the second discharge port 4 for discharge. Thus, the mixed material has undergone two-stage screening and is efficiently sorted into three specifications: large, medium, and small, and automated continuous collection is achieved.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A plastic particle screening device, characterized in that, The device includes a housing (1), with a feed inlet (2) at the top and a first discharge outlet (3) and a second discharge outlet (4) on the outer side wall of the housing (1). A first screening screen (5) is provided inside the housing (1), with one end of the first screening screen (5) sliding through the first discharge outlet (3) and extending outward. A second screening screen (6) is provided inside the housing (1), with one end of the second screening screen (6) sliding through the second discharge outlet (4) and extending outward. A moving component for reciprocatingly driving the first screening screen (5) is provided inside the housing (1), and an oscillating component for oscillating the second screening screen (6) is provided inside the housing (1). A driving component for synchronously driving the moving component and the oscillating component is provided on the housing (1).

2. The plastic particle screening device according to claim 1, characterized in that: The box (1) is fixed with two parallel guide rods (7), and the two ends of the first screening mesh (5) are slidably mounted on the two guide rods (7).

3. The plastic particle screening device according to claim 2, characterized in that: The moving assembly includes a first rotating shaft (8), a first cam (9), a fixed rod (10), a first rotating block (11), a moving frame (12), and a slider (13). The first rotating shaft (8) is rotatably mounted on the housing (1). The first cam (9) is fixedly mounted on the first rotating shaft (8). The fixed rod (10) is fixedly mounted on the first cam (9). The first rotating block (11) is rotatably mounted on the inner wall of the housing (1) and has a strip hole (14) on it. The fixed rod (10) is slidably mounted in the strip hole (14). The moving frame (12) is fixedly mounted on the bottom of the first screening screen (5). The slider (13) is slidably mounted on the moving frame (12) and is rotatably connected to the first rotating block (11).

4. The plastic particle screening device according to claim 3, characterized in that: The oscillation assembly includes a mounting block (15), a mounting rod (16), a spring (17), a second rotating shaft (18), a second cam (19), and a mounting plate (20). The mounting block (15) is fixed inside the housing (1). The mounting rod (16) is fixed on the mounting block (15). One end of the second screening mesh (6) is slidably mounted on the mounting rod (16). The spring (17) is sleeved on the mounting rod (16), and both ends of the spring (17) are fixed to the mounting block (15) and the second screening mesh (6), respectively. The second rotating shaft (18) is rotatably mounted on the housing (1). The second cam (19) is fixed on the second rotating shaft (18). The mounting plate (20) is fixed on the second screening mesh (6), and the mounting plate (20) abuts against the second cam (19).

5. A plastic particle screening device according to claim 4, characterized in that: The drive assembly includes a motor (21), a first sprocket (22), a second sprocket (23), and a chain (24). The motor (21) is fixed on the housing (1) and the output end of the motor (21) is fixedly connected to the first rotating shaft (8). The first sprocket (22) is fixed on the first rotating shaft (8), the second sprocket (23) is fixed on the second rotating shaft (18), and the chain (24) is sleeved on the first sprocket (22) and the second sprocket (23).

6. The plastic particle screening device according to claim 1, characterized in that: Below the first screening screen (5) is a guide plate (25) for guiding plastic particles to fall onto the second screening screen (6).

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