Plastic raw material screening device

Abstract

The utility model relates to the technical field of plastic raw material processing, especially a plastic raw material screening device, including the treatment box, the top of treatment box is provided with the feed inlet, the first frame, second frame and third frame are sequentially set from top to bottom in the treatment box and are inclined, the first screen cloth, second screen cloth and third screen cloth are arranged in the first frame, second frame and third frame respectively, a plurality of chutes are vertically provided on the inner side wall of treatment box, the first frame, second frame and third frame are all connected with chute slidingly, the spring is connected between the first frame, second frame and third frame and chute, the bottom of first frame, second frame and third frame is all fixedly connected with the collection box, the vibration motor is installed in the bottom of collection box, the collection box is connected with the inner side wall of treatment box slidingly, and the miscellaneous box is placed in the bottom of the inner side of treatment box, the utility model can carry out multistage screening to raw material, and satisfy the different process such as injection molding, extrusion and so on to the differentiation demand of raw material particle size.

Description

Technical Field

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

[0002] In the pretreatment of plastic raw materials, screening is a key process for removing impurities and optimizing particle characteristics. Existing screening equipment mostly uses single-layer screens, which can only remove impurities such as metal shavings, dust, and clumps, and lack the ability to classify and screen according to particle size.

[0003] Different processing techniques have significantly different requirements for raw material particle size: injection molding requires uniform particles to ensure melt flow and avoid dimensional deviations or insufficient mold filling; extrusion granulation requires particles of moderate size, as excessively fine particles can clog the feed port, while excessively coarse particles can lead to incomplete melting. For precision products such as optical and food-grade materials, particle uniformity directly affects mechanical properties and appearance quality.

[0004] The shortcomings of existing equipment are: the uneven particle size of ungraded raw materials leads to inconsistent melting states, affecting the strength, toughness, and other properties of the finished products; an additional grading process is required, reducing production efficiency and increasing costs. In particular, the large particle size variation and high impurity content of recycled materials make it difficult for existing equipment to meet the processing requirements of high-quality recycled materials. Utility Model Content

[0005] The purpose of this invention is to provide a plastic raw material screening device that can perform multi-stage screening of raw materials to meet the different particle size requirements of different processes such as injection molding and extrusion.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A plastic raw material screening device includes a processing box with a feed inlet at the top. Inside the processing box, a first frame, a second frame, and a third frame are arranged obliquely from top to bottom. A first screen, a second screen, and a third screen are respectively installed within the first, second, and third frames. Multiple vertical grooves are formed on the inner wall of the processing box. The first, second, and third frames are slidably connected to the grooves. Springs connect the first, second, and third frames to the grooves. A collection box is fixedly connected to the bottom of each of the first, second, and third frames. A vibration motor is installed at the bottom of each collection box. The collection box is slidably connected to the inner wall of the processing box. A dust collection box is placed at the bottom inner side of the processing box.

[0007] Furthermore, the mesh size of the first screen is larger than that of the second screen, and the mesh size of the second screen is larger than that of the third screen.

[0008] Furthermore, a feed guide plate is inclinedly provided at the feed inlet, and the bottom end of the feed guide plate extends to the top of the first screen.

[0009] Furthermore, a first guide plate is fixedly and inclinedly provided at the bottom of the first frame, and the bottom end of the first guide plate extends to the top of the second screen.

[0010] Furthermore, a second guide plate is fixedly inclined at the bottom of the second frame, and the bottom of the second guide plate extends to the top of the third screen.

[0011] Furthermore, side baffles are provided on both sides of the feed guide plate, the first guide plate, and the second guide plate.

[0012] Furthermore, the material collection box has a discharge port on the side near the processing box, and the processing box has a discharge port corresponding to the discharge port on its side wall.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This application utilizes a top-down first screen, a second screen, and a third screen, along with an inclined frame structure, to perform multi-stage screening of raw materials, classifying particles into different grades based on particle size. This solves the problem that existing devices can only remove impurities but cannot grade particles, thus meeting the differentiated particle size requirements of different processes such as injection molding and extrusion. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] 1. Processing box; 101. Feed inlet; 102. Slide chute; 103. Discharge outlet; 2. First frame; 3. Second frame; 4. Third frame; 5. First screen; 6. Second screen; 7. Third screen; 8. Spring; 9. Collection box; 901. Discharge outlet; 10. Vibrating motor; 11. Miscellaneous material collection box; 12. Feed guide plate; 13. First guide plate; 14. Second guide plate. Detailed Implementation

[0016] like Figure 1As shown, a plastic raw material screening device includes a processing box 1. The top of the processing box 1 has a feed inlet 101. Inside the processing box 1, a first frame 2, a second frame 3, and a third frame 4 are arranged obliquely from top to bottom. A first screen 5, a second screen 6, and a third screen 7 are respectively arranged inside the first frame 2, the second frame 3, and the third frame 4. Multiple sliding grooves 102 are vertically formed on the inner side wall of the processing box 1. The first frame 2, the second frame 3, and the third frame 4 are all slidably connected to the sliding grooves 102. A spring 8 is connected between the first frame 2, the second frame 3, and the third frame 4 and the sliding grooves 102. A collection box 9 is fixedly connected to the bottom of the first frame 2, the second frame 3, and the third frame 4. A vibration motor 10 is installed at the bottom of the collection box 9. The collection box 9 is slidably connected to the inner side wall of the processing box 1. A dust collection box 11 is placed at the bottom of the inner side of the processing box 1.

[0017] The mesh size of the first screen 5 is larger than that of the second screen 6, and the mesh size of the second screen 6 is larger than that of the third screen 7.

[0018] A feed guide plate 12 is inclinedly provided at the feed inlet 101, and the bottom end of the feed guide plate 12 extends to the top of the first screen 5.

[0019] The bottom of the first frame 2 is fixedly inclined with a first guide plate 13, and the bottom of the first guide plate 13 extends to the top of the second screen 6.

[0020] The bottom end of the second frame 3 is fixedly and inclinedly provided with a second guide plate 14, and the bottom end of the second guide plate 14 extends to the top of the third screen 7.

[0021] Side baffles are provided on both sides of the feed guide plate 12, the first guide plate 13, and the second guide plate 14.

[0022] The material collection box 9 has a discharge port 901 on the side near the processing box 1, and the side wall of the processing box 1 has a discharge port 103 corresponding to the discharge port 901.

[0023] Working principle: Plastic raw materials enter through the feed inlet 101 at the top of the processing box 1 and slide down to the top of the first screen 5 via the inclined feed guide plate 12. The first screen 5 traps particles with a diameter larger than its mesh size, and the trapped particles fall into the corresponding collection box 9 at the bottom. The particles passing through the first screen 5 are guided to the second screen 6 via the first guide plate 13. The second screen 6 traps particles with a diameter larger than its mesh size, and the trapped particles fall into the corresponding collection box 9 at the bottom. The particles passing through the second screen 6 are guided to the third screen 7 via the second guide plate 14. The third screen 7 traps particles with a diameter larger than its mesh size, and the trapped particles fall into the corresponding collection box 9 at the bottom. Impurities passing through the third screen 7 fall into the impurity collection box 11. The vibration motor 10 at the bottom of the collection box 9 drives the screen to vibrate, causing the particles to move at a uniform speed on the screen. Finally, particles of different sizes are collected in their respective collection boxes 9, and impurities fall into the impurity collection box 11.

[0024] This invention integrates impurity screening and particle size classification into a single device, eliminating the need for additional classification equipment, reducing production costs, and improving production efficiency. The three-stage screen with a gradient aperture design allows for flexible adjustment of screen specifications according to process requirements, achieving precise particle classification of raw materials and meeting the stringent requirements of high-end fields such as precision injection molding and optical-grade products.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A plastic raw material screening device, characterized in that: The system includes a processing box (1), with a feed inlet (101) at the top. Inside the processing box (1), a first frame (2), a second frame (3), and a third frame (4) are arranged obliquely from top to bottom. A first screen (5), a second screen (6), and a third screen (7) are respectively installed inside the first frame (2), the second frame (3), and the third frame (4). Multiple sliding grooves (102) are vertically provided on the inner sidewall of the processing box (1). All frames (4) are slidably connected to the slide (102). The first frame (2), the second frame (3) and the third frame (4) are connected to the slide (102) by springs (8). The bottom ends of the first frame (2), the second frame (3) and the third frame (4) are respectively fixedly connected to a collection box (9). The bottom of the collection box (9) is equipped with a vibration motor (10). The collection box (9) is slidably connected to the inner wall of the processing box (1). The inner bottom of the processing box (1) is equipped with a collection box (11).

2. The plastic raw material screening device as described in claim 1, characterized in that: The mesh size of the first screen (5) is larger than that of the second screen (6), and the mesh size of the second screen (6) is larger than that of the third screen (7).

3. The plastic raw material screening device as described in claim 1, characterized in that: A feed guide plate (12) is inclinedly provided at the feed inlet (101), and the bottom end of the feed guide plate (12) extends to the top of the first screen (5).

4. The plastic raw material screening device as described in claim 3, characterized in that: The bottom of the first frame (2) is fixedly inclined with a first guide plate (13), and the bottom of the first guide plate (13) extends to the top of the second screen (6).

5. The plastic raw material screening device as described in claim 4, characterized in that: The bottom of the second frame (3) is fixedly inclined with a second guide plate (14), and the bottom of the second guide plate (14) extends to the top of the third screen (7).

6. The plastic raw material screening device as described in claim 5, characterized in that: Side baffles are provided on both sides of the feed guide plate (12), the first guide plate (13), and the second guide plate (14).

7. The plastic raw material screening device as described in claim 1, characterized in that: The material collection box (9) has a discharge port (901) on the side near the processing box (1), and the side wall of the processing box (1) has a discharge port (103) corresponding to the discharge port (901).

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