A device for screening granular raw materials of medical injection molded parts
The multi-layer vibrating box and mechanically linked screening device achieves efficient grading of medical plastic particles of different sizes, solving the problem of insufficient screening accuracy in existing technologies and improving production efficiency and raw material purity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIHAI YIFENG PLASTIC CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-08-04
AI Technical Summary
Existing screening devices cannot effectively classify medical plastic particles of different sizes, resulting in insufficient screening accuracy, failing to meet the high standards of uniformity and purity of raw materials required by the medical industry, and having low single-stage screening efficiency.
It adopts a multi-layer vibrating box structure, with replaceable screening components installed in each vibrating box. Multi-stage synchronous screening is achieved through mechanical linkage. Different mesh sizes of screens are used to classify particles, and the uniform distribution and automatic conveying of raw materials are achieved through guide plates and conveyor belts.
It improves screening efficiency and grading accuracy, meets the high standards of the medical industry for raw materials, and is easy to maintain.
Smart Images
Figure CN224588363U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of medical injection molded part granule raw material production equipment, specifically a screening device for medical injection molded part granule raw materials. Background Technology
[0002] Screening medical plastic particles is a crucial step in ensuring the quality of injection molded parts. Particles that are too large or too small in diameter in the raw material may cause defects in the injection molded products, such as uneven surfaces or insufficient strength. Screening can effectively remove impurities.
[0003] Existing screening devices are usually single-stage screening structures, which cannot effectively classify medical plastic particles of different sizes, resulting in insufficient screening accuracy and failing to meet the high standards of uniformity and purity of raw materials required by the medical industry; moreover, single-stage screening has low efficiency, affecting overall production efficiency. Summary of the Invention
[0004] The purpose of this invention is to provide a screening device for medical injection molded parts granular raw materials, which can efficiently and accurately classify medical plastic granules of different particle sizes, thereby improving the purity of raw materials and production efficiency.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A sieving device for granular raw materials of medical injection molded parts is provided, including a working chamber. Multiple vibrating boxes are arranged inside the working chamber. Limiting blocks are fixedly connected to both sides of each vibrating box. A roller is installed at the end of each limiting block away from the vibrating box. Multiple rotating shafts are arranged on the outer wall of the working chamber. Swinging rods are fixedly connected to the outer wall of each rotating shaft. The swinging rods are arranged in pairs. Linkage grooves are formed at both ends of each swinging rod. A hollow groove is formed at the bottom of the upper swinging rod. The top of the swing rod is located inside the upper hollow groove. A screening motor is installed on the outer wall of the working chamber. A turntable is fixedly connected to the output end of the screening motor. A pulley is provided on the outer wall of the turntable. The roller passes through the linkage groove at the bottom of the upper swing rod and the linkage groove at the top of the lower swing rod. A sliding groove is opened on the outer wall of the middle layer vibration box. The pulley is located inside the sliding groove. Limiting grooves are opened on both outer walls of the working chamber. There are multiple limiting grooves. Limiting rods are fixedly connected to the inner walls of the multiple limiting grooves. The limiting rods pass through the limiting blocks. A screening assembly is installed inside the vibration box. Optionally, the screening assembly includes a screening box, a screen is provided at the bottom of the screening box, the mesh count of the multiple screens decreases from top to bottom, limit strips are provided on both outer walls of the screening box, and mounting plates are fixedly connected to the front ends of both outer walls of the screening box. Mounting grooves are opened on both sides of the front end of the screening box, the mounting plates are located inside the mounting grooves, and the mounting plates are fixedly connected to the screening box by bolts.
[0006] Optionally, the inner wall of the working chamber is fixedly connected with a guide plate, and there are two guide plates, which are arranged alternately with multiple screening components.
[0007] Optionally, a U-shaped plate is fixedly connected to the outer wall of the working chamber, and conveyor rollers are movably connected to the inner wall of the U-shaped plate and the inner wall of the working chamber. There are multiple conveyor rollers, and a conveyor belt is sleeved on the outside of the two left and right conveyor rollers. The multiple conveyor rollers in the middle are located in the middle of the conveyor belt. A conveyor motor is installed on the outer wall of the U-shaped plate, and the output end of the conveyor motor is fixedly connected to one end of the left conveyor roller.
[0008] Optionally, a door is movably connected to the outer wall of the working chamber, and the door is magnetically connected to the outer wall of the working chamber.
[0009] Optionally, the top of the working chamber is provided with a feed inlet, which is located at the center of the top of the working chamber.
[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. In operation, the granular raw material is evenly added through the feed inlet and guided by two staggered guide plates to fall into the middle position of the multi-layer vibrating box. Then, the screening motor runs, driving the turntable to rotate. The pulleys on the edge of the turntable pass through the linkage grooves of the upper and lower swing rods and slide in the groove of the middle vibrating box. This causes the middle vibrating box to move back and forth while converting the rotational motion into the swinging motion of the swing rods at a specific angle. This allows the upper and lower vibrating boxes to move back and forth synchronously with the swinging rods. The multi-layer vibrating box achieves synchronous and coordinated movement through a unique hollow groove nesting structure. Each vibrating box is equipped with replaceable screening components, including screening boxes with screens of different aperture sizes. These are positioned by limit strips and fixed in the vibrating box by mounting plates and bolts. During vibration, the multiple screens with different mesh sizes can screen particles of different diameters. Multi-stage synchronous screening is achieved through mechanical linkage. The screening boxes can be removed from the vibrating box by removing the bolts, which improves screening efficiency and grading accuracy and makes maintenance convenient.
[0011] 2. Particles in the raw materials that do not meet the screening standards of the three screening boxes are automatically conveyed by the conveyor belt after being screened by the bottom screening box. The conveyor motor drives multiple conveyor rollers to operate, with the middle conveyor roller supporting the conveyor belt to prevent material accumulation. The magnetic suction door facilitates maintenance and cleaning of the interior of this utility model. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the swing rod, roller and screening motor of this utility model; Figure 3 This is a schematic diagram of the structure of the vibration box of this utility model; Figure 4 This is an exploded view of the vibrating box and screening box of this utility model; Figure 5 This is a schematic diagram of the structure of the screening motor, turntable and pulley of this utility model; Figure 6 This is a schematic diagram of the internal structure of this utility model.
[0014] In the diagram: 1. Working chamber; 2. Vibrating box; 3. Limiting block; 4. Roller; 5. Swing rod; 6. Linkage groove; 7. Hollow groove; 8. Screening motor; 9. Turntable; 10. Pulley; 11. Slide groove; 12. Limiting groove; 13. Limiting rod; 14. Screening assembly; 1401. Screening box; 1402. Limiting strip; 1403. Mounting plate; 1404. Mounting groove; 15. Guide plate; 16. U-shaped plate; 17. Conveyor roller; 18. Conveyor belt; 19. Conveyor motor; 20. Chamber door; 21. Feed inlet. Detailed Implementation
[0015] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0016] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0017] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0019] Reference Figure 1-6 This invention provides a device for screening granular raw materials for medical injection molded parts. The device includes a working chamber 1, with multiple vibrating boxes 2 inside. Limiting blocks 3 are fixedly connected to both sides of each vibrating box 2. A roller 4 is installed at the end of each limiting block 3 away from the vibrating box 2. Multiple rotating shafts are provided on the outer wall of the working chamber 1, and swing rods 5 are fixedly connected to the outer wall of each rotating shaft. The swing rods 5 are arranged in pairs, with linkage grooves 6 at both ends. A hollow groove 7 is formed at the bottom of the upper swing rod 5, and the top of the lower swing rod 5 is located inside the upper hollow groove 7. A screening motor 8 is installed on the outer wall of the working chamber 1, and a turntable 9 is fixedly connected to the output end of the screening motor 8. A pulley 10 is provided on the outer wall of the turntable 9. The roller 4 passes through the linkage groove 6 at the bottom and top of the upper and lower swing rods 5. The outer wall of the middle vibrating box 2 is provided with a sliding groove 11, and the pulley 10 is located inside the sliding groove 11. The outer walls of both sides of the working chamber 1 are provided with limit grooves 12, and there are multiple limit grooves 12. The inner walls of the multiple limit grooves 12 are fixedly connected with limit rods 13, and the limit rods 13 pass through the limit blocks 3. The vibrating box 2 is equipped with a screening assembly 14, which includes a screening box 1401. The bottom of the screening box 1401 is provided with a screen, and the mesh count of the multiple screens decreases from top to bottom. The outer walls of both sides of the screening box 1401 are provided with limit strips 1402. The front ends of the outer walls of both sides of the screening box 1401 are fixedly connected with mounting plates 1403. The front ends of the screening box 1401 are provided with mounting grooves 1404 on both sides, and the mounting plates 1403 are located inside the mounting grooves 1404. The mounting plates 1403 are fixedly connected to the screening box 1401 by bolts.
[0020] During operation, granular raw materials are evenly fed into the feed inlet 21 at the top of the working chamber 1. Guided by two staggered guide plates 15, the raw materials fall into the middle position of the multi-layer vibrating box 2. Then, the screening motor 8 runs, driving the turntable 9 to rotate. The pulleys 10 on the edge of the turntable 9 simultaneously pass through the linkage grooves 6 of the upper and lower swing rods 5 and slide within the sliding grooves 11 of the middle vibrating box 2. This causes the middle vibrating box 2 to reciprocate while simultaneously converting the rotational motion into the reciprocating swing of the swing rods 5 at a specific angle. This causes the upper and lower vibrating boxes 2 to reciprocate synchronously with the swing of the swing rods 5. 2. Synchronous and coordinated movement is achieved through a unique hollow groove nesting structure. Each vibrating box 2 is equipped with a replaceable screening component 14, including a screening box 1401 with screens of different aperture sizes. It is positioned by a limiting strip 1402 and fixed in the vibrating box 2 by a mounting plate 1403 and bolts. During vibration, multiple screens with different mesh sizes can screen particles of different diameters. Multi-stage synchronous screening is achieved through mechanical linkage. At the same time, the screening box 1401 can be removed from the vibrating box 2 by removing the bolts, which improves screening efficiency and grading accuracy and makes maintenance convenient.
[0021] In another embodiment of this utility model, please refer to Figure 6 The inner wall of the working chamber 1 is fixedly connected with guide plates 15, and there are two guide plates 15. The two guide plates 15 are arranged alternately with multiple screening components 14. The granular raw material is evenly added from the feed port 21 at the top of the working chamber 1. The raw material is guided by the two alternately arranged guide plates 15 so that it can fall into the middle position of the multi-layer vibrating box 2.
[0022] In another embodiment of this utility model, please refer to Figure 1 A U-shaped plate 16 is fixedly connected to the outer wall of the working chamber 1. Conveyor rollers 17 are movably connected to the inner wall of the U-shaped plate 16 and the inner wall of the working chamber 1. There are multiple conveyor rollers 17. A conveyor belt 18 is sleeved on the outside of the two left and right conveyor rollers 17. The multiple conveyor rollers 17 in the middle are located in the middle of the conveyor belt 18. A conveyor motor 19 is installed on the outer wall of the U-shaped plate 16. The output end of the conveyor motor 19 is fixedly connected to one end of the left conveyor roller 17. Particles in the raw material that do not meet the screening standards of the three screening boxes 1401 are automatically conveyed by the conveyor belt 18 after being screened by the bottom screening box 1401. The conveyor motor 19 drives the multiple conveyor rollers 17 to operate. The middle conveyor roller 17 supports the conveyor belt 18 to prevent material accumulation.
[0023] In another embodiment of this utility model, please refer to Figures 1 to 6The outer wall of the working chamber 1 is movably connected to a chamber door 20, which is magnetically connected to the outer wall of the working chamber 1. The top of the working chamber 1 is provided with a feed inlet 21, which is located in the center of the top of the working chamber 1. The magnetic chamber door 20 facilitates the maintenance and cleaning of the interior of this utility model.
[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A device for screening granular raw materials for medical injection molded parts, comprising a working chamber (1), characterized in that: The working chamber (1) is equipped with a vibrating box (2) inside, and there are multiple vibrating boxes (2). Limiting blocks (3) are fixedly connected to both sides of the multiple vibrating boxes (2). A roller (4) is installed on the end of the limiting block (3) away from the vibrating box (2). The outer wall of the working chamber (1) is equipped with a rotating shaft, and there are multiple rotating shafts. A swing rod (5) is fixedly connected to the outer wall of the multiple rotating shafts. The swing rods (5) are in pairs. Linkage grooves (6) are opened at both ends of the swing rods (5). A hollow groove (7) is opened at the bottom of the upper swing rod (5). The top of the lower swing rod (5) is located inside the upper hollow groove (7). A screening motor is installed on the outer wall of the working chamber (1). 8) The output end of the screening motor (8) is fixedly connected to a turntable (9). The outer wall of the turntable (9) is provided with a pulley (10). The roller (4) passes through the linkage groove (6) at the bottom of the upper swing rod (5) and the linkage groove (6) at the top of the lower swing rod (5). The outer wall of the middle layer vibration box (2) is provided with a sliding groove (11). The pulley (10) is located inside the sliding groove (11). The outer walls on both sides of the working chamber (1) are provided with limit grooves (12). There are multiple limit grooves (12). The inner walls of the multiple limit grooves (12) are fixedly connected with limit rods (13). The limit rods (13) pass through the limit block (3). The screening assembly (14) is installed inside the vibration box (2).
2. The granular raw material screening device for medical injection molded parts as described in claim 1, characterized in that: The screening assembly (14) includes a screening box (1401), a screen is provided at the bottom of the screening box (1401), the mesh count of the multiple screens decreases from top to bottom, limit strips (1402) are provided on the outer walls of both sides of the screening box (1401), and mounting plates (1403) are fixedly connected to the front ends of the outer walls of both sides of the screening box (1401). Mounting grooves (1404) are provided on both sides of the front end of the screening box (1401), and the mounting plates (1403) are located inside the mounting grooves (1404). The mounting plates (1403) are fixedly connected to the screening box (1401) by bolts.
3. The sieving device for granular raw materials of medical injection molded parts as described in claim 1, characterized in that: The inner wall of the working chamber (1) is fixedly connected with a guide plate (15), and there are two guide plates (15). The two guide plates (15) are arranged alternately with multiple screening components (14).
4. The sieving device for granular raw materials of medical injection molded parts as described in claim 1, characterized in that: The outer wall of the working chamber (1) is fixedly connected to a U-shaped plate (16). The inner wall of the U-shaped plate (16) and the inner wall of the working chamber (1) are movably connected to conveyor rollers (17). There are multiple conveyor rollers (17). The two left and right conveyor rollers (17) are fitted with a conveyor belt (18). The multiple middle conveyor rollers (17) are located in the middle of the conveyor belt (18). The outer wall of the U-shaped plate (16) is equipped with a conveyor motor (19). The output end of the conveyor motor (19) is fixedly connected to one end of the left conveyor roller (17).
5. The sieving device for granular raw materials of medical injection molded parts as described in claim 1, characterized in that: The outer wall of the working chamber (1) is movably connected to a door (20), and the door (20) is magnetically connected to the outer wall of the working chamber (1).
6. The sieving device for granular raw materials of medical injection molded parts as described in claim 1, characterized in that: The top of the working chamber (1) is provided with a feed inlet (21), which is located at the center of the top of the working chamber (1).