A feeding device for an injection molding machine
By using the screening box and vibration system of the injection molding machine's feeding device, the problems of blockage and adhesion caused by the agglomeration of plastic raw materials are solved, achieving complete plasticization of raw materials and automatic cleaning of storage bins, thereby improving product quality and operational efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANTAI DEV ZONE HUILONG PLASTIC IND CO LTD
- Filing Date
- 2025-04-19
- Publication Date
- 2026-06-05
Smart Images
Figure CN224323459U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of feeding equipment technology, specifically a feeding device for an injection molding machine. Background Technology
[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. The operation of an injection molding machine mainly includes four processes: feeding, heating, melting, and injection. Plastic granules are added to the heating and melting device of the injection molding machine through the feeding device, causing the plastic granules to melt into a solution. Then, the molten plastic is injected into the mold cavity under high pressure. After cooling and solidification, the molded product is obtained.
[0003] During operation, injection molding machines typically use a spiral pipe to feed granular raw materials into the storage tank at the top of the machine. Then, an internal threaded rod feeds the material from the storage tank at a constant speed into the hot melt section of the machine. Because granular raw materials are highly hygroscopic, they are prone to absorbing moisture and clumping during storage. This clumped material, once it enters the funnel at the bottom of the storage tank, not only affects the funnel's feeding efficiency and can easily cause blockages, but also makes melting the clumped material more difficult, leading to incomplete plasticization and ultimately affecting the quality of the plastic product. During operation, raw material granules also tend to adhere to the inner wall of the storage tank, requiring workers to reach inside for cleaning, which is inconvenient for them. Utility Model Content
[0004] The purpose of this invention is to provide a feeding device for an injection molding machine to solve the problem in the prior art that agglomerated raw materials easily clog the feed hopper of the injection molding machine and affect the quality of plastic products.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a material feeding device for an injection molding machine, comprising a storage bin, a screening box fixedly connected to the top of the storage bin, a hopper provided at the bottom of the storage bin, a sieve plate provided inside the screening box, a fixed frame fixedly connected to the top of the sieve plate, a limiting groove provided on one side of the fixed frame, a pressure block provided on one side of the top of the sieve plate, and one side of the pressure block slidably connected to the limiting groove, and two connecting rods provided inside the storage bin.
[0006] Preferably, two first connecting blocks are fixedly connected to the inner side of the fixed frame, and two pull rods are fixedly connected to the top of the pressure block. The bottom ends of the two pull rods pass through the first connecting blocks and are slidably connected to the first connecting blocks. A first spring is fixedly installed between the top of the two first connecting blocks and the two pull rods. During operation, the fixed frame drives the pressure block to vibrate up and down, thereby causing the pressure block to knock and break up the clumps of plastic material that have slid to the bottom of the pressure block.
[0007] Preferably, two L-shaped rods are fixedly connected to both sides of the fixed frame, and four movement slots adapted to the four L-shaped rods are opened on the inner wall of the screening box. The four L-shaped rods are slidably connected to the four movement slots respectively. Four second connecting blocks are fixedly connected inside the screening box. Sliding rods are fixedly connected between the inner side of the four L-shaped rods and the bottom of the fixed frame. The four sliding rods pass through the four second connecting blocks respectively and are slidably connected to the four second connecting blocks. A second spring is fixedly connected between the bottom of the four second connecting blocks and the four L-shaped rods.
[0008] Preferably, a drive motor is fixedly connected to one side of the screening box, and a rotating shaft is fixedly connected to the output end of the drive motor. The rotating shaft passes through the screening box and is rotatably connected to the screening box. Two cams are fixedly connected to the outside of the rotating shaft.
[0009] Preferably, a first bevel gear is fixedly connected to the outer sides of both ends of the rotating shaft, a worm gear is rotatably installed on both sides of the screening box, a second bevel gear is fixedly connected to one end of each of the two worm gears, and the two second bevel gears are respectively meshed with the two first bevel gears. A worm wheel is rotatably connected to both sides of the screening box, and the two worm wheels are respectively meshed with the two worm gears. A turntable is fixedly connected to one side of each of the two worm wheels, and a first limiting block is fixedly connected to one side of each of the two turntables. During operation, the rotation of the turntable drives the moving rod to swing up and down through the first limiting block, thereby causing the scraping ring inside the worm wheel to move up and down to prevent the raw material from sticking to the inner wall of the storage tank.
[0010] Preferably, each of the two rotating shafts is rotatably connected to a moving rod at both ends, each of the two moving rods has a first sliding groove inside, the two first limiting blocks are slidably connected inside the two first sliding grooves respectively, and each of the two moving rods is fixedly connected to a second limiting block on one side.
[0011] Preferably, the top ends of both connecting rods penetrate the storage bin and are slidably connected to the storage bin. The top ends of both connecting rods are provided with second sliding grooves. The two second limiting blocks are slidably connected to the inside of the two second sliding grooves. Multiple moving rods are provided inside the storage bin. One end of each of the two connecting rods penetrates multiple scraping rings and is fixedly connected to the scraping rings. The outer sides of the multiple scraping rings are all in contact with the inner wall of the storage bin.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. In this application, during operation, the fixed frame is driven to vibrate by the cam, thereby screening and filtering the raw materials entering the screening box. At the same time, when the fixed frame vibrates, the pressure block moves up and down through the first spring, thereby breaking up the screened agglomerated raw materials. This prevents the agglomerated raw materials from entering the hot melt device of the injection molding machine, as the agglomerated raw materials are prone to incomplete plasticization, which would affect the quality of the plastic products.
[0014] 2. In this application, while the fixed frame vibrates and screens the raw materials during operation, the connecting rod drives the scraper ring to move up and down inside the storage tank. The scraper ring cleans the inner wall of the storage tank to prevent plastic raw materials from sticking to the inner wall of the storage tank. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the internal structure of the present invention;
[0017] Figure 3 This is a cross-sectional view of the fixed frame structure of this utility model;
[0018] Figure 4 This is a cross-sectional view of the turntable structure of this utility model.
[0019] The following are the labels in the diagram: 1. Storage bin; 2. Screening box; 3. Hopper; 4. Screen plate; 5. Fixed frame; 6. Limiting groove; 7. Pressing block; 8. Pull rod; 9. First connecting block; 10. First spring; 11. L-shaped rod; 12. Moving groove; 13. Second connecting block; 14. Slide rod; 15. Second spring; 16. Rotating shaft; 17. Cam; 18. First bevel gear; 19. Worm gear; 20. Second bevel gear; 21. Worm wheel; 22. Turntable; 23. First limiting block; 24. Moving rod; 25. Second limiting block; 26. Connecting rod; 27. Scraper ring. Detailed Implementation
[0020] 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.
[0021] Example: Figure 1 - Figure 4 As shown, this utility model provides a technical solution for a feeding device for an injection molding machine, including a storage tank 1, a screening box 2 fixedly connected to the top of the storage tank 1, a hopper 3 provided at the bottom of the storage tank 1, a screen plate 4 provided inside the screening box 2, a fixed frame 5 fixedly connected to the top of the screen plate 4, a limiting groove 6 provided on one side of the fixed frame 5, a pressure block 7 provided on one side of the top of the screen plate 4, and one side of the pressure block 7 slidably connected to the limiting groove 6. Two connecting rods 26 are provided inside the storage tank 1.
[0022] Two first connecting blocks 9 are fixedly connected to the inner side of the fixed frame 5, and two pull rods 8 are fixedly connected to the top of the pressure block 7. The bottom ends of the two pull rods 8 pass through the first connecting blocks 9 and are slidably connected to the first connecting blocks 9. A first spring 10 is fixedly installed between the top of the two first connecting blocks 9 and the two pull rods 8. During operation, the fixed frame 5 drives the pressure block 7 to vibrate up and down, thereby causing the pressure block 7 to knock and break up the clumps of plastic material that have slid to the bottom of the pressure block 7.
[0023] Two L-shaped rods 11 are fixedly connected to both sides of the fixed frame 5. The inner wall of the screening box 2 is provided with four movement slots 12 that are adapted to the four L-shaped rods 11. The four L-shaped rods 11 are slidably connected to the four movement slots 12 respectively. Four second connecting blocks 13 are fixedly connected inside the screening box 2. Sliding rods 14 are fixedly connected between the inner side of the four L-shaped rods 11 and the bottom of the fixed frame 5. The four sliding rods 14 pass through the four second connecting blocks 13 respectively and are slidably connected to the four second connecting blocks 13. A second spring 15 is fixedly connected between the bottom of the four second connecting blocks 13 and the four L-shaped rods 11.
[0024] A drive motor is fixedly connected to one side of the screening box 2. A rotating shaft 16 is fixedly connected to the output end of the drive motor. The rotating shaft 16 passes through the screening box 2 and is rotatably connected to the screening box 2. Two cams 17 are fixedly connected to the outside of the rotating shaft 16.
[0025] Both ends of the rotating shaft 16 are fixedly connected to the outer sides of the first bevel gear 18. Both sides of the screening box 2 are rotatably mounted with worm gears 19. One end of each of the two worm gears 19 is fixedly connected to a second bevel gear 20. The two second bevel gears 20 are respectively meshed with the two first bevel gears 18. Both sides of the screening box 2 are rotatably connected to worm wheels 21. The two worm wheels 21 are respectively meshed with the two worm gears 19. A turntable 22 is fixedly connected to one side of each of the two worm wheels 21. A first limiting block 23 is fixedly connected to one side of each of the two turntables 22. When working, the turntable 22 rotates and drives the moving rod 24 to swing up and down through the first limiting block 23, thereby causing the scraping ring 27 inside the worm wheel 21 to move up and down to prevent the raw material from sticking to the inner wall of the storage tank 1.
[0026] Both ends of the two rotating shafts 16 are rotatably connected to moving rods 24. Each of the two moving rods 24 has a first sliding groove inside. Two first limiting blocks 23 are slidably connected inside the two first sliding grooves respectively. Each of the two moving rods 24 has a second limiting block 25 fixedly connected to one side.
[0027] The top ends of the two connecting rods 26 pass through the storage bin 1 and are slidably connected to the storage bin 1. The top ends of the two connecting rods 26 are provided with second sliding grooves. The two second limiting blocks 25 are slidably connected to the inside of the two second sliding grooves. Multiple moving rods 24 are provided inside the storage bin 1. One end of the two connecting rods 26 passes through multiple scraping rings 27 and is fixedly connected to the scraping rings 27. The outer sides of the multiple scraping rings 27 are all in contact with the inner wall of the storage bin 1.
[0028] It should be noted that this utility model is a feeding device for an injection molding machine. During operation, the transport pipe sends the raw material into the screening box 2 from the top inlet of the screening box 2. Then, the drive motor starts to work. The drive motor drives the cam 17 to rotate through the rotating shaft 16. When the cam 17 rotates, the protruding part of the cam 17 contacts the fixed frame 5, causing the fixed frame 5 to move upward. The upward movement of the fixed frame 5 compresses the second spring 15 through the L-shaped rod 11. Under the action of the elastic force of the second spring 15, the fixed frame 5 is always in contact with the pressure block 7. When the protruding part of the cam 17 is no longer in contact with the fixed frame 5, the fixed frame 5 moves downward and returns to its original position under the action of the second spring 15. The rotation of the cam 17 causes the fixed frame 5 to vibrate up and down continuously during operation, so that the screen plate 4 screens and filters the raw material entering the screening box 2, preventing the agglomerated raw material from entering the hot melt device of the injection molding machine.
[0029] After screening, the agglomerated raw material moves along the inclined direction of the screen plate 4 to the lower side of the screen plate 4. When the fixed frame 5 moves upward, it drives the pressure block 7 to move upward. Then, the fixed frame 5 moves downward under the elastic force of the second spring 15. At this time, the pressure block 7 continues to rise under the action of inertia. At this time, the pressure block 7 pulls the first spring 10 through the pull rod 8. The fixed frame 5 moves downward and also pulls the first spring 10 through the first connecting block 9. When the inertia of the pressure block 7 disappears, the pressure block 7 quickly descends under the action of the elastic force of the first spring 10. At this time, the pressure block 7 collides with the agglomerated raw material that has moved to the lower side of the screen plate 4, thereby breaking up and crushing the agglomerated raw material. The broken raw material falls into the storage bucket 1 through the screen holes of the screen plate 4 for use.
[0030] While the rotating shaft 16 rotates, it drives the first bevel gear 18 to rotate. The first bevel gear 18 drives the worm gear 19 to rotate via the second bevel gear 20. The worm gear 19 drives the turntable 22 to rotate via the worm wheel 21. One end of the moving rod 24 is rotatably connected to the rotating shaft 16. The rotation of the turntable 22 drives the moving rod 24 to swing back and forth around the rotating shaft 16 via the first limiting block 23. The swinging of the first limiting block 23 drives the connecting rod 26 to move up and down via the second limiting block 25. The connecting rod 26 drives the scraper ring 27 to move in the storage bin 1. The internal movement up and down, the scraper ring 27 cleans the inner wall of the storage tank 1 to prevent plastic raw materials from sticking to the inner wall of the storage tank 1. There is no need for manual cleaning of the residue stuck to the inner wall of (1), thereby reducing the labor burden of workers. When working, the raw materials inside (1) fall into the injection molding machine after passing through (3). The connection method between (3) and (1) and the injection molding machine is a mature existing technology, so it will not be described in detail here. When not working, workers can disassemble (3) so that workers can clean (3) and the inside of the injection molding machine.
[0031] 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.
Claims
1. A feeding device for an injection molding machine, comprising a storage tank (1), characterized in that: The storage bin (1) is fixedly connected to the top of the screening box (2), the storage bin (1) is provided with a hopper (3) at the bottom, the screening box (2) is provided with a screen plate (4) inside, the top of the screen plate (4) is fixedly connected with a fixed frame (5), a limiting groove (6) is opened on one side of the fixed frame (5), a pressing block (7) is provided on one side of the top of the screen plate (4), and one side of the pressing block (7) is slidably connected to the limiting groove (6). The storage bin (1) is provided with two connecting rods (26).
2. The feeding device for an injection molding machine according to claim 1, characterized in that: Two first connecting blocks (9) are fixedly connected to the inner side of the fixed frame (5), and two pull rods (8) are fixedly connected to the top of the pressure block (7). The bottom ends of the two pull rods (8) pass through the first connecting blocks (9) and are slidably connected to the first connecting blocks (9). A first spring (10) is fixedly installed between the top of the two first connecting blocks (9) and the two pull rods (8).
3. The feeding device for an injection molding machine according to claim 2, characterized in that: Two L-shaped rods (11) are fixedly connected to both sides of the fixed frame (5). The inner wall of the screening box (2) is provided with four movement slots (12) that are adapted to the four L-shaped rods (11). The four L-shaped rods (11) are slidably connected to the four movement slots (12). Four second connecting blocks (13) are fixedly connected inside the screening box (2). Sliding rods (14) are fixedly connected between the inner side of the four L-shaped rods (11) and the bottom of the fixed frame (5). The four sliding rods (14) pass through the four second connecting blocks (13) and are slidably connected to the four second connecting blocks (13). A second spring (15) is fixedly connected between the bottom of the four second connecting blocks (13) and the four L-shaped rods (11).
4. The feeding device for an injection molding machine according to claim 1, characterized in that: A drive motor is fixedly connected to one side of the screening box (2), and a rotating shaft (16) is fixedly connected to the output end of the drive motor. The rotating shaft (16) passes through the screening box (2) and is rotatably connected to the screening box (2). Two cams (17) are fixedly connected to the outside of the rotating shaft (16).
5. The feeding device for an injection molding machine according to claim 4, characterized in that: The outer sides of both ends of the rotating shaft (16) are fixedly connected to the first bevel gear (18). The two sides of the screening box (2) are rotatably mounted with worm gears (19). One end of each of the two worm gears (19) is fixedly connected to a second bevel gear (20). The two second bevel gears (20) are respectively meshed with the two first bevel gears (18). The two sides of the screening box (2) are rotatably connected to worm wheels (21). The two worm wheels (21) are respectively meshed with the two worm gears (19). One side of each of the two worm wheels (21) is fixedly connected to a turntable (22). One side of each of the two turntables (22) is fixedly connected to a first limiting block (23).
6. The feeding device for an injection molding machine according to claim 5, characterized in that: Both ends of the two rotating shafts (16) are rotatably connected to moving rods (24), and the two moving rods (24) are provided with first sliding grooves. The two first limiting blocks (23) are slidably connected to the two first sliding grooves respectively, and the two moving rods (24) are fixedly connected to one side of a second limiting block (25).
7. The feeding device for an injection molding machine according to claim 6, characterized in that: The top ends of the two connecting rods (26) pass through the storage bin (1) and are slidably connected to the storage bin (1). The top ends of the two connecting rods (26) are provided with second sliding grooves. The two second limiting blocks (25) are slidably connected to the inside of the two second sliding grooves. The storage bin (1) is provided with multiple moving rods (24). One end of the two connecting rods (26) passes through multiple scraping rings (27) and is fixedly connected to the scraping rings (27). The outer sides of the multiple scraping rings (27) are all in contact with the inner wall of the storage bin (1).