A plastic particle screening device

Abstract

This utility model discloses a plastic granule screening device, relating to the field of plastic granule screening technology. It includes a screening machine body, an installation frame mounted on the top of the screening machine body, a feed hopper mounted on the top of the installation frame, and a dispersing mechanism within the installation frame. The dispersing mechanism includes a connecting shaft rotatably mounted within the installation frame, one end of the connecting shaft extending movably through the installation frame and equipped with a drive motor. A roller is fixedly connected to the outer wall of the connecting shaft, and multiple circular holes are evenly distributed on the outer wall of the roller. A lever is detachably installed in each circular hole via a fixing component. The use of this utility model's universal dispersing mechanism facilitates the even dispersion of plastic granules falling from the feed hopper, preventing the plastic granules from agglomerating and clogging the feed inlet or screening screen of the screening machine body. This ensures smooth subsequent screening operations and improves screening accuracy, allowing plastic granules of different sizes to fully contact the screening screen, reducing screening omissions and misscreening.

Description

Technical Field

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

[0002] The grading and screening of plastic granules is a key process in plastic processing and production. The screening accuracy and efficiency directly affect the processing quality and production progress of subsequent plastic products. The main structure of existing plastic granule screening devices is mostly a screening machine body with a top feed hopper. The plastic granules to be screened fall directly into the screening machine body through the feed hopper to complete the screening operation.

[0003] In actual plastic granule screening operations, during the production, granulation, storage, transportation, and conveying processes, plastic granules are prone to sticking together due to intermolecular adsorption forces and electrostatic adsorption. At the same time, factors such as external pressure during transportation and changes in humidity in the storage environment will further promote the formation of clumps of varying sizes. The agglomerated plastic granules will fall directly from the feed hopper onto the screening machine body. Because the overall volume of the agglomerated granules is much larger than that of individual plastic granules, they will get stuck in the screening mesh inside the screening machine, greatly reducing the effective screening area of ​​the screening mesh, blocking the screening channel, and preventing subsequent plastic granules from making smooth contact with the screening mesh to complete the screening. This leads to the obstruction of the entire screening process and a significant decrease in the screening efficiency of the screening machine body. Summary of the Invention

[0004] This utility model proposes a plastic particle screening device to solve the problems in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A plastic granule screening device includes a screening machine body, an installation frame installed on the top of the screening machine body, a feed hopper installed on the top of the installation frame, and a dispersion mechanism for dispersing plastic granules provided inside the installation frame.

[0007] The dispersing mechanism includes a connecting shaft rotatably disposed within the mounting frame. One end of the connecting shaft extends movably through the mounting frame and is equipped with a drive motor. The drive motor is mounted on the side of the mounting frame. A roller is fixedly connected to the outer wall of the connecting shaft. Multiple circular holes are evenly distributed on the outer wall of the roller. A lever is detachably installed in each circular hole through a fixing component.

[0008] Preferably, the fixing member includes a rectangular cavity formed in the bottom of the lever, a mounting plate fixed in the rectangular cavity, and a connecting plate slidably disposed on both sides of the mounting plate, wherein a plurality of compression springs are provided between the connecting plate and the mounting plate;

[0009] A pressing rod is fixedly connected to the top of the connecting plate, and the pressing rod extends through the lever.

[0010] A fixing rod is fixedly connected to the bottom of the connecting plate. A fixing hole is provided on the inner wall of the circular hole to match the fixing rod. One end of the fixing rod passes through the lever and extends into the fixing hole.

[0011] Preferably, a limiting block is symmetrically fixed to the outer wall of the bottom of the lever, and a limiting groove is formed on the inner wall of the circular hole to match the limiting block, and the limiting block is slidably assembled inside the limiting groove.

[0012] Preferably, the length of the pressing rod is greater than the length of the fixing rod, so as to ensure that the fixing rod can be completely disengaged from the fixing hole when the pressing rod is pressed.

[0013] Preferably, the lever is made of flexible rubber.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] The use of this universal dispersion mechanism facilitates the uniform dispersion of plastic granules falling from the feed hopper, preventing the granules from agglomerating and clogging the feed inlet or screen of the screening machine. This ensures smooth subsequent screening operations and improves screening accuracy, allowing plastic granules of different sizes to fully contact the screen, reducing screening omissions and misscreening. Furthermore, the use of fixing components facilitates the replacement of the levers. When the levers wear or become damaged due to long-term friction with the granules, they can be disassembled and replaced individually without replacing the entire roller, thus reducing maintenance costs. Attached Figure Description

[0016] Figure 1 A structural schematic diagram from an orthographic perspective is shown according to an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the structure of the feed hopper provided according to an embodiment of the present invention is shown;

[0018] Figure 3 A cross-sectional view of a feed hopper provided according to an embodiment of the present invention is shown;

[0019] Figure 4 A schematic diagram of the structure of the dispersing mechanism provided according to an embodiment of the present invention is shown;

[0020] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0021] Legend:

[0022] 1. Screening machine body; 2. Feed hopper; 3. Mounting frame; 4. Drive motor; 5. Connecting shaft; 6. Pulley; 7. Roller; 8. Mounting plate; 9. Pressing rod; 10. Limiting block; 11. Limiting groove; 12. Fixing rod; 13. Compression spring; 14. Fixing hole; 15. Connecting plate; 16. Rectangular cavity. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1 — Figure 5 This utility model provides a technical solution:

[0025] A plastic granule screening device includes a screening machine body 1 (existing technology). A mounting frame 3 is installed on the top of the screening machine body 1. The mounting frame 3 serves as a mounting carrier for the feed hopper 2 and the dispersing mechanism, connecting the feeding structure to the screening machine body 1 to ensure the continuity of the feeding and dispersing processes. It also protects the internal dispersing mechanism, preventing plastic granules from splashing or external impurities from entering and affecting the dispersing effect. The feed hopper 2 is installed on the top of the mounting frame 3. The feed hopper 2 adopts a funnel-shaped structure that is wider at the top and narrower at the bottom, facilitating concentrated feeding of plastic granules, reducing scattering during the feeding process, improving feeding efficiency, and simultaneously allowing for... The plastic granules serve as an initial guide, ensuring they fall precisely into the dispersing mechanism within the mounting frame 3, preventing granules from accumulating at the top edge of the frame 3. The mounting frame 3 is equipped with a dispersing mechanism for dispersing the plastic granules. This dispersing mechanism facilitates the uniform dispersion of the plastic granules falling from the feed hopper 2, preventing them from agglomerating and clogging the feed inlet or screen of the screening machine body 1. This ensures smooth subsequent screening operations, improves screening accuracy, and allows plastic granules of different sizes to fully contact the screen, reducing screening omissions and misscreening.

[0026] The dispersing mechanism includes a connecting shaft 5 rotatably mounted within the mounting frame 3. The connecting shaft 5 transmits power from the drive motor 4 to the rollers 7, causing them to rotate synchronously and providing power support for the dispersing action. Its rotatable mounting within the mounting frame 3 allows for connection with bearings, reducing friction during rotation, minimizing power loss, and extending component lifespan. One end of the connecting shaft 5 extends movably beyond the mounting frame 3 and houses the drive motor 4, which is mounted on the side of the mounting frame 3. The drive motor 4 serves as the power source for the dispersing mechanism, providing stable driving force for the rotation of the connecting shaft 5. Its fixed mounting on the side of the mounting frame 3 ensures the stability of the drive motor 4 during operation, preventing motor vibration and unstable power transmission. Rollers 7 are fixedly connected to the outer wall of the connecting shaft 5. As the mounting carrier for the lever 6, its rotation can drive the lever 6 on the outer wall to move synchronously. The lever 6 contacts the plastic particles, thus dispersing the particles. The outer wall of the roller 7 has multiple evenly distributed circular holes, and each circular hole has a lever 6 detachably installed in it through a fixing component. The evenly distributed lever 6 ensures that the plastic particles are subjected to uniform force during the dispersion process, improving the dispersion effect and avoiding local particle accumulation that cannot be dispersed. The lever 6 is in direct contact with the plastic particles and moves in a circular motion under the drive of the roller 7, agitating and breaking up the falling plastic particles, thus dispersing the particles. The use of fixing components facilitates the replacement of the lever 6. When the lever 6 is worn or damaged due to long-term friction with the particles, the corresponding lever 6 can be disassembled and replaced separately without replacing the entire roller 7, reducing maintenance costs.

[0027] In this invention, the fixing component includes a rectangular cavity 16 formed in the bottom of the lever 6. The rectangular cavity 16 provides installation space for components such as the mounting plate 8, connecting plate 15, and compression spring 13, ensuring that each component can be assembled in an orderly manner and work normally. The mounting plate 8, fixed in the rectangular cavity 16, serves to fix and support the compression spring 13 and provides a guiding reference for the sliding of the connecting plate 15, ensuring that the connecting plate 15 can slide smoothly along both sides of the mounting plate 8 and avoid deviation. The connecting plates 15, which are slidably arranged on both sides of the mounting plate 8, can drive the fixing rod 12 and the pressing rod 9 to move synchronously, realizing the engagement and disengagement of the fixing rod 12 with the fixing hole 14, thereby realizing the lever. Installation and disassembly of lever 6: Multiple compression springs 13 are provided between the connecting plate 15 and the mounting plate 8. When the compression springs 13 are in their natural state, they can generate an outward elastic force on the connecting plate 15, pushing the connecting plate 15 to move away from the mounting plate 8, thereby driving the fixing rod 12 to be inserted into the fixing hole 14, thus fixing the lever 6 and ensuring that the lever 6 will not fall off due to vibration or collision during operation. When the pressing rod 9 is pressed, the compression spring 13 is compressed and stores elastic potential energy. After the pressing rod 9 is released, the elastic potential energy of the compression spring 13 is released, pushing the connecting plate 15 to reset, and driving the fixing rod 12 to be inserted into the fixing hole 14 again. The structure is simple, the operation is convenient, and the fixing effect is stable.

[0028] A pressing rod 9 is fixedly connected to the top of the connecting plate 15, and the pressing rod 9 extends through the lever 6. The pressing rod 9 provides a pressing force point for the operator, so that the operator can drive the connecting plate 15 to move by pressing the pressing rod 9, thereby controlling the separation of the fixing rod 12 from the fixing hole 14 and realizing the disassembly of the lever 6.

[0029] A fixing rod 12 is fixedly connected to the bottom of the connecting plate 15. A fixing hole 14 is provided on the inner wall of the circular hole to match the fixing rod 12. One end of the fixing rod 12 passes through the lever 6 and extends into the fixing hole 14. The lever 6 can be detachably fixed by using the fixing rod 12 and the fixing hole 14.

[0030] In this invention, limiting blocks 10 are symmetrically fixed to the outer wall of the bottom of the lever 6, and limiting grooves 11 are formed on the inner wall of the circular hole to match the limiting blocks 10. The limiting blocks 10 are slidably assembled inside the limiting grooves 11. The cooperation between the limiting blocks 10 and the limiting grooves 11 plays a limiting and guiding role. On the one hand, when installing the lever 6, the positions of the fixing rod 12 and the fixing hole 14 can be quickly positioned by aligning the limiting blocks 10 and the limiting grooves 11, thereby improving the installation efficiency of the lever 6 and avoiding installation failure due to misalignment of the fixing rod 12 and the fixing hole 14. On the other hand, it can limit the rotation of the lever 6 in the circular hole, preventing the lever 6 from rotating due to the force of the plastic particles during operation, which would cause uneven force on the fixing rod 12, resulting in bending and damage. At the same time, it ensures that the lever 6 moves in the same direction, improving the dispersion effect.

[0031] In this invention, the length of the pressing rod 9 is greater than the length of the fixing rod 12, ensuring that pressing the pressing rod 9 can completely disengage the fixing rod 12 from the fixing hole 14. This avoids the situation where the length of the pressing rod 9 is insufficient, resulting in part of the fixing rod 12 remaining in the fixing hole 14 after pressing, which would prevent the lever 6 from being disassembled smoothly. At the same time, it can prevent the operator from damaging the pressing rod 9, the connecting plate 15, or the compression spring 13 due to excessive pressing, thus extending the service life of each component of the fixing part and ensuring the smoothness of the disassembly operation.

[0032] In this invention, the lever 6 is made of flexible rubber. Flexible rubber has good flexibility and wear resistance. On the one hand, it can prevent the plastic particles from being damaged by impact when the lever 6 comes into contact with them due to excessive hardness, thus ensuring the integrity of the plastic particles and reducing particle loss. On the other hand, the flexible material can act as a buffer, reducing the impact force between the lever 6 and the plastic particles, reducing the wear of the lever 6, and extending the service life of the lever 6. At the same time, the rubber material has a certain friction, which can better drive the movement of the plastic particles and improve the dispersion effect.

[0033] Working principle: When using this plastic granule screening device, start the drive motor 4 and the screening machine body 1. The drive motor 4 drives the connecting shaft 5 to rotate, and the connecting shaft 5 drives the roller 7 to rotate synchronously. The roller 7 drives the evenly distributed levers 6 on the outer wall to make a circular motion. The plastic granules to be screened are put into the feed hopper 2. The feed hopper 2 guides the plastic granules into the installation frame 3. The falling plastic granules come into contact with the rotating levers 6. The flexible rubber levers 6 evenly move and disperse the plastic granules, dispersing the agglomerated plastic granules into individual granules, avoiding the granules from clumping and blocking the screening channel.

[0034] The dispersed plastic particles fall evenly into the screening machine body 1 below, and the different particle sizes of plastic particles are classified and screened through the screening screen inside the screening machine body 1.

[0035] During long-term use, if the lever 6 becomes worn or damaged, it needs to be replaced. Specifically, press the pressing rods 9 on both sides. The pressing rods 9 drive the connecting plate 15 to move closer to the mounting plate 8. The connecting plate 15 compresses the spring 13, and at the same time, it drives the fixing rod 12 to retract into the lever 6, releasing the fixation of the lever 6. Then, pull out the lever 6 to disassemble it. Next, press the pressing rod 9 of the new lever 6, align the bottom of the lever 6 with the circular hole on the roller 7, and align the limiting block 10 on the outer wall of the lever 6 with the limiting groove 11 on the inner wall of the circular hole. Insert the lever 6 into the circular hole until the limiting block 10 slides to the bottom of the limiting groove 11. At this time, release the pressing rod 9, compress the spring 13 to release the elastic potential energy, and push the connecting plate 15 to reset away from the mounting plate 8. The connecting plate 15 drives the fixing rod 12 to pass through the lever 6 and insert it into the fixing hole 14 on the inner wall of the circular hole, completing the installation and fixation of the lever 6.

[0036] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plastic particle screening device comprising a screening machine body (1), characterized in that, The screening machine body (1) is equipped with an installation frame (3) on top, and a feed hopper (2) is installed on top of the installation frame (3). The installation frame (3) is provided with a dispersion mechanism for dispersing plastic particles. The dispersing mechanism includes a connecting shaft (5) rotatably disposed within the mounting frame (3). One end of the connecting shaft (5) extends movably through the mounting frame (3) and is provided with a drive motor (4). The drive motor (4) is mounted on the side of the mounting frame (3). A roller (7) is fixedly connected to the outer wall of the connecting shaft (5). Multiple circular holes are evenly opened on the outer wall of the roller (7). A lever (6) is detachably installed in each circular hole through a fixing component.

2. The plastic granule screening device according to claim 1, characterized in that, The fixing component includes a rectangular cavity (16) opened in the bottom of the lever (6), a mounting plate (8) fixed in the rectangular cavity (16), and a connecting plate (15) slidably disposed on both sides of the mounting plate (8). A plurality of compression springs (13) are provided between the connecting plate (15) and the mounting plate (8). A pressing rod (9) is fixedly connected to the top of the connecting plate (15), and the pressing rod (9) extends through the lever (6); The bottom of the connecting plate (15) is fixedly connected to a fixing rod (12), and a fixing hole (14) is provided on the inner wall of the circular hole to match the fixing rod (12). One end of the fixing rod (12) passes through the lever (6) and extends into the fixing hole (14).

3. A plastics particle sizing apparatus according to claim 2, wherein, The lever (6) is symmetrically fixed to the outer wall of the bottom of the lever (6), and the inner wall of the circular hole is provided with a limiting groove (11) to match the limiting block (10). The limiting block (10) is slidably assembled inside the limiting groove (11).

4. A plastics particle sizing apparatus according to claim 3, wherein, The length of the pressing rod (9) is greater than the length of the fixing rod (12), ensuring that when the pressing rod (9) is pressed, the fixing rod (12) can be completely disengaged from the fixing hole (14).

5. A plastic particle sizing device according to claim 1, wherein, The lever (6) is made of flexible rubber.

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