A screening device for processing waste plastics into particles

Abstract

The utility model discloses a kind of screening equipment for waste plastics processing granulation, including rack, double-layer sieve frame, spring and vibrating motor, the rack and double-layer sieve frame are connected by spring, the feeding side of double-layer sieve frame is equipped with inclined screw conveyor, the outlet pipe of this screw conveyor is equipped with guide chute, and the outlet end of guide chute extends to double-layer sieve frame, the lower end of screw conveyor is equipped with conveying motor, and the feeding pipe of screw conveyor is connected with feeding hopper, the side of double-layer sieve frame is equipped with rotating motor by support frame, and rotating motor output end is connected with the rotating shaft fixed on the lower surface of guide chute by speed reducer. The utility model is equipped with screw conveyor to feed into double-layer sieve frame, not only makes staff effectively save strength, but also can avoid single input too much, simultaneously using the guide chute of rotation can dynamically adjust drop position, make material evenly cover sieve surface, improve screening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of waste plastic processing technology, and in particular to a screening device for processing waste plastic into granules. Background Technology

[0002] Plastic products are ubiquitous in daily life. When these products reach the end of their lifespan or intended use, they are discarded and become waste plastic. However, waste plastic can be recycled and reprocessed, retaining good overall material properties and meeting the requirements for the production of plastic products. To recycle and reuse waste plastic, it is usually granulated. After granulation, the waste plastic particles need to be screened to obtain waste plastic particles of different diameters.

[0003] Currently, most plastic granule screening equipment on the market is designed with a relatively high height to facilitate the placement of large-capacity receiving devices at the screening outlet. However, when the screening equipment is set too high, it requires considerable effort for workers to move the granules to be screened into the equipment. Furthermore, manual feeding is less uniform and can easily result in excessive material being poured in at once, causing the material to concentrate in a localized area of ​​the screen and reducing screening efficiency.

[0004] To address this issue, we propose a screening device for processing waste plastics into granules. Utility Model Content

[0005] The purpose of this invention is to provide a screening device for processing waste plastics into granules, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A screening device for processing waste plastics into granules includes a frame, a double-layer screen frame, springs, and a vibrating motor. The frame and the double-layer screen frame are connected by springs. The vibrating motor is installed on the bottom surface of the double-layer screen frame. An inclined screw conveyor is provided on the feeding side of the double-layer screen frame. A guide chute is provided below the discharge pipe of the screw conveyor, and the discharge end of the guide chute extends onto the double-layer screen frame. A conveying motor is installed at the lower end of the screw conveyor, and a feeding hopper is connected to the feed pipe of the screw conveyor. A rotary motor is installed on the side of the double-layer screen frame through a support frame, and the output end of the rotary motor is connected to a rotating shaft fixed to the lower surface of the guide chute through a reducer.

[0008] In a further embodiment, the discharge end of the guide trough is provided with a tapered opening that gradually narrows from the guide trough toward the double-layer screen frame.

[0009] In a further embodiment, the feed end of the feed chute is provided with a gradually expanding opening that gradually expands from the feed chute toward the screw conveyor.

[0010] In a further embodiment, a vertical baffle is also installed at one end of the guide trough near the screw conveyor, and the upper surface of the baffle adopts an arc surface structure.

[0011] In a further embodiment, the support frame is also equipped with an arc-shaped track, which is coaxial with the rotating shaft, and the lower surface of the guide groove is inlaid with balls that roll along the arc-shaped track by means of a mounting block.

[0012] In a further embodiment, limit switches are installed at both ends of the arc-shaped track.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention uses a screw conveyor to feed material into a double-layer screen frame. This not only allows workers to add material to the lower hopper in the early stages, reducing the feeding height and saving effort, but also improves the uniformity of feeding, preventing material accumulation caused by excessive feeding at one time. At the same time, the rotating guide chute can dynamically adjust the material drop position, ensuring that the material evenly covers the screen surface and improving screening efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the right front view structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the right rear view structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the installation structure of the material guide trough and the rotary motor of this utility model;

[0018] Figure 4 This is a bottom view of the installation structure of the material guide trough and the arc-shaped track of this utility model.

[0019] In the diagram: 1. Frame; 2. Double-layer screen frame; 3. Spring; 4. Vibrating motor; 5. Screw conveyor; 6. Discharge pipe; 7. Guide chute; 71. Gradually narrowing opening; 72. Gradually widening opening; 73. Baffle; 8. Conveyor motor; 9. Feed pipe; 10. Feed hopper; 11. Support frame; 12. Rotary motor; 13. Reducer; 14. Shaft; 15. Arc track; 16. Ball bearing; 17. Limit switch. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-2 A screening device for processing waste plastics into granules includes a frame 1, a double-layer screen frame 2, springs 3, and a vibrating motor 4. The double-layer screen frame 2 is separated by a perforated screen, so that plastic particles larger than the screen holes remain in the upper screen frame, while plastic particles smaller than the screen holes fall into the lower screen frame. The double-layer screen frame 2 is arranged at an angle, and a guide collection trough is set at the lower end of the two screen frames. A discharge pipe is set at the bottom of the trough, so that the plastic particles can gradually move towards the discharge pipe under the action of gravity vibration. Springs 3 are installed at the four corners of the frame 1, and mounting plates are set at the four corners of the bottom surface of the double-layer screen frame 2 corresponding to each spring 3. Limiting posts (not shown in the figure) are fixed on the lower surface of the mounting plate and the top surface of the frame 1. The limiting posts are inserted into the springs 3 to limit the excessive bending and deformation of the springs 3, but the upper and lower limiting posts do not contact each other, leaving space for the springs 3 to extend and retract. The vibrating motor 4 is installed on the bottom surface of the double-layer screen frame 2 to drive the double-layer screen frame 2 to vibrate and screen as a whole.

[0024] Please see Figure 1-2An inclined screw conveyor 5 is provided on the feeding side, i.e., the higher end side, of the double-layer screen frame 2. The discharge pipe 6 of the screw conveyor 5 is located at the higher end and is set on the side close to the double-layer screen frame 2. A guide trough 7 is provided below the discharge pipe 6. The discharge pipe 6 and the guide trough 7 do not contact each other, and the discharge end of the guide trough 7 extends to the double-layer screen frame 2. The height of the end of the guide trough 7 near the discharge pipe 6 is higher than the height of the other end, so that it is inclined into the double-layer screen frame 2 for more complete material feeding. A conveyor motor 8 is installed at the lower end of the screw conveyor 5. An auger conveyor shaft (not shown in the figure) is rotatably installed inside the screw conveyor 5. The output shaft of the conveyor motor 8 is connected to the end of the auger conveyor shaft, thereby driving the auger conveyor shaft to rotate and feed material. A feed pipe 9 is connected to the lower end side of the screw conveyor 5. The feed pipe 9 is connected to a feeding hopper 10. The height of the feeding hopper 10 is significantly lower than the height of the double-layer screen frame 2, which makes it easier for workers to feed material with less effort.

[0025] Please see Figure 3 A support frame 11 is fixed on the side wall of the double-layer screen frame 2 near the screw conveyor 5. A rotary motor 12 is fixed on the lower surface of the support frame 11. The output shaft of the rotary motor 12 passes through the upper surface of the support frame 11 and is connected to a reducer 13. The reducer 13 is fixed on the upper surface of the support frame 11. One end of the rotating shaft 14 is connected to the reducer 13. The other end of the rotating shaft 14 is fixed to the lower surface of the guide chute 7, so that the guide chute 7 can swing around the rotating shaft 14 as the center line, dynamically adjusting the position of the falling material, so that the plastic particles fall more dispersed on the screen frame.

[0026] Please see Figure 3 The discharge end of the guide trough 7 is provided with a tapered opening 71 that gradually narrows towards the double-layer screen frame 2 to reduce material ejection from the side. The feed end of the guide trough 7 is provided with a tapered opening 72 that gradually expands towards the screw conveyor 5 to increase the receiving space and ensure that the particles falling from the discharge pipe 6 can always fall onto the guide trough 7 when the guide trough 7 swings. A vertical baffle 73 is also installed at the end of the guide trough 7 near the screw conveyor 5. The baffle 73 prevents plastic particles from being ejected from the rear of the guide trough 7, and the upper surface of the baffle 73 adopts an arc structure to facilitate the discharge pipe 6 to approach the guide trough 7.

[0027] Please see Figure 3-4To improve the stability of the oscillation of the guide trough 7, an arc-shaped track 15 is installed on the support frame 11. The arc-shaped track 15 is located near the discharge side of the guide trough 7 and below it. The arc-shaped track 15 is coaxial with the rotating shaft 14. An mounting block is fixed on the lower surface of the guide trough 7, and a ball bearing 16 is rotatably embedded under the mounting block. The ball bearing 16 is located on the center line of the guide trough 7. The part of the ball bearing 16 protruding from the mounting block can roll along the arc groove of the arc-shaped track 15. The length of the arc-shaped track 15 is limited, restricting the guide trough 7 to oscillate only 30° to the left and right. Furthermore, in order to achieve intelligent control, limit switches 17 are installed at both ends of the arc-shaped track 15. The limit switches 17 are used to convert the position signal into an electrical signal and transmit it to the control system that controls the opening and closing of the rotary motor 12 and adjusts the direction of rotation. When the guide trough 7 moves to a certain end of the arc-shaped track 15, it is detected by the limit switch 17. The control system then controls the rotary motor 12 to adjust the direction of rotation, so that the guide trough 7 rotates back, realizing continuous oscillation and material dispersion.

[0028] Work process: First, waste plastic granules are put into the feeding hopper 10, then the conveyor motor 8 is started. The conveyor motor 8 drives the conveyor shaft inside the screw conveyor 5 to rotate, lifting the material into the guide trough 7. The rotary motor 12 is started to drive the guide trough 7 to swing periodically. The material is evenly spread on the upper layer of the double-layer screen frame 2 through the guide trough 7. Then the vibration motor 4 is started to drive the double-layer screen frame 2 to vibrate and screen.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A screening device for processing waste plastics into granules, comprising a frame (1), a double-layer screen frame (2), springs (3), and a vibrating motor (4), wherein the frame (1) and the double-layer screen frame (2) are connected by springs (3), and the vibrating motor (4) is installed on the bottom surface of the double-layer screen frame (2), characterized in that: The double-layer screen frame (2) is provided with an inclined screw conveyor (5) on the feeding side. The discharge pipe (6) of the screw conveyor (5) is provided with a guide trough (7), and the discharge end of the guide trough (7) extends to the double-layer screen frame (2). The lower end of the screw conveyor (5) is equipped with a conveying motor (8), and the feed pipe (9) of the screw conveyor (5) is connected to a feeding hopper (10). The side of the double-layer screen frame (2) is equipped with a rotary motor (12) through a support frame (11), and the output end of the rotary motor (12) is connected to a rotating shaft (14) fixed on the lower surface of the guide trough (7) through a reducer (13).

2. The screening equipment for processing waste plastics into granules according to claim 1, characterized in that: The discharge end of the guide trough (7) is provided with a tapered opening (71) that gradually narrows from the guide trough (7) toward the double-layer screen frame (2).

3. The screening equipment for granulation of waste plastics according to claim 1, characterized in that: The feed end of the feed trough (7) is provided with a gradually expanding opening (72) that gradually expands from the feed trough (7) toward the screw conveyor (5).

4. The screening equipment for processing waste plastics into granules according to claim 1, characterized in that: The guide trough (7) is also equipped with a vertical baffle (73) at one end near the screw conveyor (5), and the upper surface of the baffle (73) adopts an arc surface structure.

5. The screening equipment for granulation of waste plastics according to claim 1, characterized in that: The support frame (11) is also equipped with an arc track (15), which is coaxial with the rotating shaft (14). The lower surface of the guide groove (7) is inlaid with balls (16) that roll along the arc track (15) by means of the mounting block.

6. The screening equipment for granulation of waste plastics according to claim 5, characterized in that: Limit switches (17) are installed at both ends of the arc-shaped track (15).

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