A raw material screening device for plastic processing

Abstract

The utility model discloses a raw material screening device for plastic processing, including support frame, be equipped with motor on the support frame and fix, motor output fixedly equipped with eccentric wheel, the eccentric wheel outer wall rotatory joint is equipped with connecting rod, connecting rod bottom rotatory joint is equipped with the mounting frame, the mounting frame inboard is equipped with sieve plate, be equipped with multiple fixed mechanism in the mounting frame, the fixed mechanism includes the plug -in rod and fixed cover, and the plug -in rod is fixed in the mounting frame top surface and is inserted with sieve plate, and the fixed cover is inserted in the plug -in rod top, and the plug -in rod outer wall is seted up with sliding slot, the sliding slot is seted up with multiple and is slidably connected with the clamping block respectively, and the fixed cover inner wall is fixedly equipped with the snap ring, whole installation process is simple and direct and does not need any professional tool, and the replacement efficiency and convenience of different specifications sieve plate have been improved greatly.

Description

Technical Field

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

[0002] In the plastics manufacturing and processing industry, the quality screening of raw materials is a crucial step in ensuring product quality and production efficiency. Current plastic raw material screening equipment on the market has significant shortcomings in adapting to the screening needs of different particle sizes, especially when dealing with plastic raw materials of different particle sizes and shapes. Existing equipment often uses fixed screen plate installation structures or complex bolt-fixing methods. In scenarios where the production line needs to frequently change screen plates of different aperture sizes to adapt to different product requirements, operators need to spend a lot of time disassembling and installing, sometimes even requiring the use of specialized tools for tedious disassembly and assembly. Especially in mass production and multi-variety, small-batch production models, this inefficient screen plate replacement method not only prolongs production preparation time and reduces equipment utilization, but also fails to meet the urgent needs of the modern plastics processing industry for rapid equipment switching and efficient operation. Utility Model Content

[0003] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a raw material screening device for plastic processing to solve the technical problems mentioned in the background art.

[0004] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a raw material screening device for plastic processing, comprising a support frame, a motor fixedly mounted on the support frame, an eccentric wheel fixedly mounted at the output end of the motor, a connecting rod rotatably connected to the outer wall of the eccentric wheel, an installation frame rotatably connected to the bottom end of the connecting rod, a screen plate mounted inside the installation frame, and multiple sets of fixing mechanisms arranged within the installation frame. Each fixing mechanism includes an insert rod and a fixing sleeve. The insert rod is fixed to the top surface of the installation frame and inserted into the screen plate, and the fixing sleeve is inserted into the top end of the insert rod. A sliding groove is formed on the outer wall of the insert rod, and multiple sets of sliding grooves are provided, each slidably connected to a locking block. A retaining ring is fixedly mounted on the inner wall of the fixing sleeve, and a sliding groove is formed on the outer wall of the fixing sleeve, and multiple sets of sliding grooves are slidably connected to sliders. Unlocking sleeves are fixedly mounted inside the multiple sets of sliders. A rotating sleeve is rotatably mounted on the outer wall of the fixing sleeve, and a limiting plate is fixedly mounted at the top end of the rotating sleeve.

[0005] The present invention is further configured such that limiting grooves are provided on the outer sides of the multiple sets of sliders, and multiple sets of limiting plates are provided and respectively abut against the limiting grooves. Through the cooperative design of the limiting plates and limiting grooves, the sliders are effectively prevented from shifting or shaking during movement, thus ensuring the stability and accuracy of the screening device.

[0006] The present invention is further configured such that an annular groove is provided on the outer wall of the fixed sleeve, and multiple sets of the limiting plates slide in the annular groove. The sliding connection structure between the annular groove and the limiting plate enables the limiting plate to move along the annular trajectory, thereby realizing synchronous limiting control of multiple sliders, greatly simplifying the operation process and improving the overall coordination of the device.

[0007] The present invention is further configured such that push springs are connected between the inner sides of the multiple sets of card blocks and the sliding grooves. The push springs are provided in multiple sets, and the push springs provide continuous elastic support for the card blocks, enabling the card blocks to automatically return to their original positions and maintain a tight fit with the card grooves, thereby enhancing the connection stability and reliability of the device in a vibration environment.

[0008] The present invention is further configured such that the outer side of the multiple sets of card blocks and the inner wall of the card ring are both set as inclined surfaces. The inclined surface design forms a wedge-shaped structure between the card block and the card ring, which can generate radial extrusion force under the action of rotational force, thereby achieving a more secure locking effect and facilitating smooth separation during unlocking.

[0009] The present invention is further configured such that a positioning block is slidably provided on the outer wall of the rotating sleeve, and multiple sets of positioning blocks are provided, each with a return spring connected between its top end and the outer wall of the rotating sleeve. A compression spring is connected to the outer wall of the fixed sleeve, and a limiting sleeve is connected to the top end of the compression spring. The limiting sleeve slides on the outer wall of the fixed sleeve and abuts against the top ends of multiple sets of positioning blocks. A positioning groove is provided on the outer wall of the fixed sleeve, and multiple sets of positioning grooves are provided, each abutting against multiple sets of positioning blocks. Through the meshing structure of the positioning block and the positioning groove, combined with the double elastic protection of the return spring and the compression spring, a precise angle positioning system is formed, ensuring that the rotating sleeve can accurately stop at the preset position, effectively avoiding the problem of screen plate loosening caused by accidental rotation.

[0010] The present invention is further configured such that a movable groove is provided at the top of the insertion rod, a compression spring is connected in the movable groove, an abutment block is connected at the top of the compression spring, and a push block is fixed inside the unlocking sleeve. The compression spring and the abutment block in the movable groove are designed to form a buffer and shock absorption mechanism, which can smoothly transmit the force during the pushing process of the unlocking sleeve, reduce the impact and protect the connection structure, and extend the service life of the device.

[0011] The present invention is further configured such that a sliding seat is fixedly provided on the outer side of the mounting frame, and a slide rail is fixedly provided on the top surface of the support frame. The sliding seat is provided in multiple sets and is slidably connected to multiple sets of slide rails respectively. The screen plate is provided with insertion holes, and the insertion holes are provided in multiple sets, each with rounded corners on the outer side and is inserted into multiple sets of insertion rods respectively. The design of the slide rail and the sliding seat enables the screen plate mounting frame to move smoothly along the predetermined track, facilitating the quick loading and unloading of the screen plate. The rounded corner design of the insertion holes reduces the frictional resistance when the insertion rods are inserted, realizing the rapid and accurate positioning of the screen plate and greatly improving the operational efficiency and convenience of switching between screen plates of different specifications in the screening device.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a raw material screening device for plastic processing, which has the following beneficial effects: 1. This raw material screening device for plastic processing cleverly solves the problem of tedious and time-consuming replacement of different screen plates in traditional screening equipment through its innovative fixing mechanism design. Operators only need to align the insertion holes and rods on the screen plate and insert them. The rounded corner design on the outer side of the screen plate will automatically push the locking block into the sliding groove. After the fixing sleeve and the rod are fully inserted, the push spring will automatically reset and push the locking block to abut against the locking ring. The entire installation process is simple and intuitive and requires no professional tools, which greatly improves the efficiency and convenience of replacing screen plates of different specifications. It is especially suitable for mass production and multi-variety small-batch production modes, which can effectively shorten the production preparation time and improve the equipment utilization rate, perfectly meeting the urgent needs of modern plastic processing industry for rapid switching and efficient operation of screening equipment.

[0013] 2. The unlocking and disassembly mechanism of this device is also scientifically and efficiently designed. By pushing the limiting sleeve to release the contact with the positioning block, the return spring drives the positioning block to disengage from the positioning groove. Then, the rotating sleeve is rotated to make the limiting plate slide away from the limiting groove along the annular groove. Finally, the push block is pushed to drive the unlocking sleeve to slide and contact the locking block, realizing a one-click quick disassembly function. This design not only greatly reduces the time and complexity of screen plate replacement, but also effectively avoids the problems of fastener loosening and screen plate deformation that are easy to occur in traditional fixed structures. Even in high-frequency use environments, it can still maintain stable and reliable operating performance, making screen plate replacement and adjustment easy and convenient, and greatly improving the adaptability and production continuity of the equipment.

[0014] 3. This raw material screening device for plastic processing also integrates several refined structural optimization designs. Driven by a motor, the eccentric wheel rotates, and the connecting rod repeatedly drives the mounting frame to slide along the slide rail, achieving efficient vibratory screening. The rounded corner design between the screen plate and the insertion rod provides a smooth insertion experience. The cooperation between the slider and the unlocking sleeve ensures precise control during disassembly, and the combination of the rotating sleeve and the limiting plate provides a reliable locking mechanism. These carefully considered structural details together construct a screening system that is both easy to operate and highly efficient and reliable, greatly improving the overall performance and user experience of the plastic raw material screening process. It provides plastic processing enterprises with more flexible, efficient, and convenient advanced equipment support, effectively improving raw material utilization and product consistency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a raw material screening device for plastic processing according to the present invention; Figure 2 This is a schematic diagram of the eccentric wheel in this utility model; Figure 3 This is a schematic diagram of the disassembled structure of the fixing mechanism in this utility model; Figure 4 This is a cross-sectional view of the fixing mechanism in this utility model; Figure 5 This is a cross-sectional view of the rotating sleeve and the limiting sleeve in this utility model.

[0016] In the diagram: 1. Support frame; 2. Motor; 3. Eccentric wheel; 4. Connecting rod; 5. Mounting frame; 6. Screen plate; 7. Insert rod; 8. Fixing sleeve; 9. Sliding groove; 10. Locking block; 11. Snap ring; 12. Sliding groove; 13. Sliding block; 14. Unlocking sleeve; 15. Rotating sleeve; 16. Limiting plate; 17. Limiting groove; 18. Annular groove; 19. Push spring; 20. Positioning block; 21. Reset spring; 22. Compression spring; 23. Limiting sleeve; 24. Positioning groove; 25. Movable groove; 26. Compression spring; 27. Abutment block; 28. Push block; 29. ​​Slide seat; 30. Slide rail; 31. Insertion hole. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0020] Please see Figures 1-5 A raw material screening device for plastic processing includes a support frame 1, a motor 2 fixedly mounted on the support frame 1, an eccentric wheel 3 fixedly mounted at the output end of the motor 2, a connecting rod 4 rotatably connected to the outer wall of the eccentric wheel 3, an installation frame 5 rotatably connected to the bottom end of the connecting rod 4, a screen plate 6 provided inside the installation frame 5, and multiple sets of fixing mechanisms provided inside the installation frame 5. Each fixing mechanism includes an insert rod 7 and a fixing sleeve 8. The insert rod 7 is fixed to the top surface of the installation frame 5 and inserted into the screen plate 6. The fixing sleeve 8 is inserted into the top end of the insert rod 7. A sliding groove 9 is provided on the outer wall of the insert rod 7. Multiple sets of sliding grooves 9 are provided and slidably connected to locking blocks 10. A retaining ring 11 is fixedly mounted on the inner wall of the fixing sleeve 8. A sliding groove 12 is provided on the outer wall of the fixing sleeve 8. Multiple sets of sliding grooves 12 are provided and slidably connected to sliders 13. Unlocking sleeves 14 are fixedly mounted inside the multiple sets of sliders 13. A rotating sleeve 15 is rotatably mounted on the outer wall of the fixing sleeve 8. A limiting plate 16 is fixedly mounted at the top end of the rotating sleeve 15.

[0021] Each of the multiple sets of sliders 13 has a limiting groove 17 on its outer side, and the limiting plate 16 is provided in multiple sets and abuts against the limiting groove 17 respectively.

[0022] The outer wall of the fixed sleeve 8 is provided with an annular groove 18, and multiple sets of limiting plates 16 slide within the annular groove 18. Multiple sets of push springs 19 are provided between the inner side of the multiple sets of card blocks 10 and the sliding groove 9.

[0023] The outer side of the multiple sets of card blocks 10 and the inner wall of the card ring 11 are both set as inclined surfaces.

[0024] The outer wall of the rotating sleeve 15 is provided with a positioning block 20. There are multiple sets of positioning blocks 20, and each of them is connected to a return spring 21 between its top end and the outer wall of the rotating sleeve 15. The outer wall of the fixed sleeve 8 is connected with a compression spring 22. The top end of the compression spring 22 is connected with a limiting sleeve 23. The limiting sleeve 23 slides on the outer wall of the fixed sleeve 8 and abuts against the top end of the multiple sets of positioning blocks 20. The outer wall of the fixed sleeve 8 is provided with a positioning groove 24. There are multiple sets of positioning grooves 24, and each of them abuts against the multiple sets of positioning blocks 20.

[0025] The top of the insertion rod 7 has a movable groove 25, and a compression spring 26 is connected inside the movable groove 25. The top of the compression spring 26 is connected to an abutment block 27, and a push block 28 is fixed inside the unlocking sleeve 14.

[0026] The mounting frame 5 is fixedly provided with a slide seat 29 on the outside, and the support frame 1 is fixedly provided with a slide rail 30 on the top surface. The slide seat 29 is provided in multiple sets and is slidably connected to multiple sets of slide rails 30 respectively. The sieve plate 6 is provided with an insertion hole 31. The insertion hole 31 is provided in multiple sets and the outside of each set is rounded and is inserted into multiple sets of insertion rods 7 respectively.

[0027] In this embodiment, during use, the multiple sets of insertion holes 31 on the sieve plate 6 are respectively inserted into the multiple sets of insertion rods 7. The rounded corners on the outside of the insertion holes 31 push the multiple sets of locking blocks 10 to slide into the sliding groove 9 and squeeze the multiple sets of push springs 19. At the same time, the multiple sets of fixing sleeves 8 are inserted into the insertion rods 7. When the multiple sets of locking blocks 10 are fully inserted into the fixing sleeves 8, the multiple sets of push springs 19 reset and push the locking blocks 10 to slide out of the sliding groove 9, so that the bottom surface of the multiple sets of locking blocks 10 abuts against the retaining ring 11, thereby completing the installation of the sieve plate 6. The plastic raw material is placed on the sieve plate 6 in the mounting frame 5. The motor 2 is started to drive the eccentric wheel 3 to rotate. The eccentric wheel 3 drives the connecting rod 4 to move. The connecting rod 4 repeatedly drives the mounting frame 5 to slide along the slide rail 30 through the multiple sets of sliding seats 29, so that the sieve plate 6 screens the plastic raw material. The screened plastic raw material falls into the external collection device.

[0028] More specifically, when the screen plate 6 needs to be replaced, the limiting sleeve 23 is pushed to release the contact with the multiple sets of positioning blocks 20. The multiple sets of reset springs 21 pull the positioning blocks 20 so that their bottom ends are disengaged from the positioning grooves 24, releasing the positioning of the rotating sleeve 15. The rotating sleeve 15 is rotated to drive the multiple sets of limiting plates 16 to slide along the annular groove 18 and disengage from the limiting groove 17, releasing the limiting of the multiple sets of sliders 13. The push block 28 is pushed to drive the unlocking sleeve 14 to slide. The unlocking sleeve 14 abuts against the outside of the multiple sets of locking blocks 10 so that it slides into the sliding groove 9 and squeezes the multiple sets of push springs 19. Then the contact between the multiple sets of locking blocks 10 and the locking ring 11 can be released, and the fixing sleeve 8 can be separated from the insertion rod 7. At the same time, the screen plate 6 can be separated from the multiple sets of insertion rods 7, and the screen plate 6 can be disassembled. Then, screen plates 6 of different models can be installed.

[0029] In summary, during use or operation of the overall equipment: When in use, the multiple sets of insertion holes 31 on the screen plate 6 are connected to the multiple sets of insertion rods 7. The rounded corners on the outer side of the insertion holes 31 push the multiple sets of locking blocks 10 to slide into the sliding groove 9, compressing the multiple sets of push springs 19. Simultaneously, the multiple sets of fixing sleeves 8 are connected to the insertion rods 7. When the multiple sets of locking blocks 10 are fully inserted into the fixing sleeves 8, the multiple sets of push springs 19 reset, pushing the locking blocks 10 out of the sliding groove 9, causing the bottom surface of the multiple sets of locking blocks 10 to abut against the retaining ring 11, thus completing the installation of the screen plate 6. Plastic raw materials are placed on the screen plate 6 within the mounting frame 5. The motor 2 is started, driving the eccentric wheel 3 to rotate. The eccentric wheel 3 drives the connecting rod 4 to move. The connecting rod 4 repeatedly drives the mounting frame 5 to slide along the slide rail 30 via the multiple sets of sliding seats 29, allowing the screen plate 6 to screen the plastic raw materials. The screened plastic raw materials fall into the external collection device.

[0030] When the screen plate 6 needs to be replaced, push the limiting sleeve 23 to release the contact with the multiple sets of positioning blocks 20. The multiple sets of reset springs 21 pull the positioning blocks 20 so that their bottom ends are disengaged from the positioning grooves 24, releasing the positioning of the rotating sleeve 15. Rotate the rotating sleeve 15 to drive the multiple sets of limiting plates 16 to slide away from the limiting grooves 17 along the annular grooves 18, releasing the limiting of the multiple sets of sliders 13. Push the push block 28 to drive the unlocking sleeve 14 to slide. The unlocking sleeve 14 abuts against the outside of the multiple sets of locking blocks 10 so that it slides into the sliding grooves 9 and squeezes the multiple sets of push springs 19. Then the contact between the multiple sets of locking blocks 10 and the locking rings 11 can be released, and the fixing sleeve 8 can be separated from the insertion rods 7. At the same time, the screen plate 6 can be separated from the multiple sets of insertion rods 7, and the screen plate 6 can be disassembled. Then, screen plates 6 of different models can be installed.

[0031] Of all the solutions mentioned above, those involving connections between two components can be selected based on the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other well-known connection methods. These will not be elaborated on here. For all the fixed connections mentioned above, welding is the preferred option. In all the solutions mentioned above, the operation of electrical components, unless otherwise specified, is controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and wiring connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here. The specific models and specifications of the electrical components involved in this solution need to be selected and determined according to the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, and therefore will not be described in detail. Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be described in detail in this utility model. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A raw material screening device for plastic processing, comprising a support frame (1), characterized in that: A motor (2) is fixedly mounted on the support frame (1). An eccentric wheel (3) is fixedly mounted on the output end of the motor (2). A connecting rod (4) is rotatably connected to the outer wall of the eccentric wheel (3). A mounting frame (5) is rotatably connected to the bottom end of the connecting rod (4). A sieve plate (6) is provided inside the mounting frame (5). Multiple fixing mechanisms are provided inside the mounting frame (5). The fixing mechanism includes a plug rod (7) and a fixing sleeve (8). The plug rod (7) is fixed to the top surface of the mounting frame (5) and plugged into the sieve plate (6). The fixing sleeve (8) is plugged into the plug rod (7). 7) At the top, the outer wall of the insertion rod (7) is provided with a sliding groove (9), the sliding groove (9) is provided with multiple sets and is slidably connected with a locking block (10), the inner wall of the fixed sleeve (8) is fixed with a retaining ring (11), the outer wall of the fixed sleeve (8) is provided with a sliding groove (12), the sliding groove (12) is provided with multiple sets and is slidably connected with a slider (13), the inner side of the multiple sets of sliders (13) is fixed with an unlocking sleeve (14), the outer wall of the fixed sleeve (8) is rotatably provided with a rotating sleeve (15), the top of the rotating sleeve (15) is fixed with a limiting plate (16).

2. The raw material screening device for plastic processing according to claim 1, characterized in that: multiple sets Limiting grooves (17) are provided on the outer side of each slider (13), and multiple sets of limiting plates (16) are provided and respectively abut against the limiting grooves (17).

3. The raw material screening device for plastic processing according to claim 2, characterized in that: The outer wall of the fixed sleeve (8) is provided with an annular groove (18), and the multiple sets of the limiting plates (16) slide in the annular groove (18).

4. The raw material screening device for plastic processing according to claim 3, characterized in that: multiple sets Push springs (19) are connected between the inner side of the card block (10) and the sliding groove (9), and multiple sets of push springs (19) are provided.

5. The raw material screening device for plastic processing according to claim 4, characterized in that: The outer side of the multiple sets of card blocks (10) and the inner wall of the card ring (11) are both set as inclined surfaces.

6. The raw material screening device for plastic processing according to claim 5, characterized in that: The outer wall of the rotating sleeve (15) is provided with a positioning block (20). The positioning block (20) is provided in multiple sets and a return spring (21) is connected between the top end and the outer wall of the rotating sleeve (15). The outer wall of the fixed sleeve (8) is provided with a compression spring (22). The top end of the compression spring (22) is connected with a limiting sleeve (23). The limiting sleeve (23) slides on the outer wall of the fixed sleeve (8) and abuts against the top end of the multiple sets of positioning blocks (20). The outer wall of the fixed sleeve (8) is provided with a positioning groove (24). The positioning groove (24) is provided in multiple sets and abuts against the multiple sets of positioning blocks (20) respectively.

7. A raw material screening device for plastic processing according to claim 6, characterized in that: The top of the insertion rod (7) is provided with a movable groove (25), and a compression spring (26) is connected inside the movable groove (25). The top of the compression spring (26) is connected with an abutment block (27), and a push block (28) is fixed inside the unlocking sleeve (14).

8. The raw material screening device for plastic processing according to claim 7, characterized in that: The mounting frame (5) is fixedly provided with a slide block (29) on the outside, and the support frame (1) is fixedly provided with a slide rail (30) on the top surface. The slide block (29) is provided with multiple sets and is slidably connected to multiple sets of slide rails (30). The sieve plate (6) is provided with a hole (31). The hole (31) is provided with multiple sets and the outer side is provided with rounded corners and is respectively connected to multiple sets of plug rods (7).

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