A feeding mechanism of a plastic extruder
By introducing a vibrating hopper and rotating plate structure into the feeding mechanism of a plastic extruder, combined with cam and fan design, the problem of the inability to filter small impurities in existing technologies is solved, achieving efficient cleaning and conveying of plastic raw materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN DONGZHOU PLASTIC ELECTRONICS CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-09
AI Technical Summary
The feeding mechanism of existing plastic extruders cannot effectively filter small impurities, such as dust and packaging bag residues, resulting in a decrease in the purity of plastic raw materials.
A feeding mechanism for a plastic extruder was designed, which adopts a vibrating hopper and a hopper rotating plate combined with a cam, fan and push plate structure. Through vibration screening and air separation, small impurities are removed, and the adjustable hopper rotating plate and push plate structure ensure that pure raw materials enter the reaction chamber.
It effectively removes small impurities and packaging bag residues, improves the purity of plastic raw materials, avoids filter clogging and material waste, and ensures efficient material delivery.
Smart Images
Figure CN224334993U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of feeding mechanisms for extruders, specifically a feeding mechanism for a plastic extruder. Background Technology
[0002] Extruders are a type of plastic machinery that originated in the 18th century. Based on the angle between the material flow direction at the die head and the screw centerline, extruder heads can be divided into right-angle die heads and angled die heads. Screw extruders rely on the pressure and shearing force generated by the rotation of the screw to fully plasticize and uniformly mix the material, which is then formed through a die. Plastic extruders can be basically classified into twin-screw extruders, single-screw extruders, and less common multi-screw extruders and screwless extruders.
[0003] A feeder for a modified PMMA plastic granule extruder, with publication number CN 222115988 U, includes a feeding bin and a support frame. The feeding bin is equipped with a feeding mechanism, which includes a geared motor, a drive wheel, a belt, a driven wheel, and a screen. The output end of the geared motor is connected to a tilting plate.
[0004] In the above-mentioned modified PMMA plastic granule extruder, the feeder screen can only effectively filter larger impurities and foreign objects in the raw material, but cannot filter smaller foreign objects, such as dust and packaging bag residue generated during product storage and transportation. If the volume of the plastic raw material is larger than the impurities to be filtered, these impurities will enter the extruder, reducing the purity of the plastic raw material.
[0005] Therefore, a feeding mechanism for a plastic extruder is proposed to address the above problems. Utility Model Content
[0006] To address the problems mentioned in the background section, this invention provides a feeding mechanism for a plastic extruder, which has the advantage of filtering out small impurities.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a feeding mechanism for a plastic extruder, comprising a feeding mechanism housing, a vibrating hopper slidably disposed inside the feeding mechanism housing, a ventilation hole on one side of the vibrating hopper, a hopper rotating plate rotatably connected to the middle of the vibrating hopper, a filter hole on the hopper rotating plate, a hopper pusher plate slidably disposed on the upper side of the hopper rotating plate, a motor fixedly connected to the outer side of the feeding mechanism housing, a cam fixedly connected to the output end of the motor, the top of the cam closely attached to the bottom of the vibrating hopper, mounting supports on both sides of the feeding mechanism housing, a fan on one side of the feeding mechanism housing, a conveyor belt below the fan, and a reaction chamber below the conveyor belt.
[0008] Preferably, a rotating shaft is provided through one side of the rotating plate of the hopper, and holes one are provided on both sides of the outer shell of the feeding mechanism, and holes two are provided on both sides of the vibrating hopper. The rotating shaft passes through holes one and holes two, and elastic pads are sleeved on the outer sides of both ends of the rotating shaft. The elastic pads do not contact the outer shell of the feeding mechanism, and the elastic pads directly contact the vibrating hopper and generate compression.
[0009] By adopting the above technical solution, the rotating plate of the hopper can rotate around the rotating shaft. Since the vibrating hopper is in a vibrating state, the diameter of the rotating shaft is smaller than the diameter of hole one. During vibration, the rotating shaft does not collide with the outer shell of the feeding mechanism. The rotating shaft is fixed in hole two by an external elastic pad. The elastic pad can reduce the impact between the rotating shaft and the vibrating hopper caused by vibration.
[0010] Preferably, a hydraulic push rod is fixedly connected to the top of the mounting support, and a push plate is hinged to the output end of the hydraulic push rod. The top of the push plate presses against the bottom of the rotating plate of the hopper.
[0011] By adopting the above technical solution, the mounting support is part of the outer shell of the feeding mechanism and will not vibrate with the vibrating hopper. The height of the push plate can be adjusted by adjusting the extension of the hydraulic push rod, so that the hopper rotating plate rotates and the push plate rotates around the hinge at the same time, so that the top of the push plate is always in close contact with the bottom of the hopper rotating plate.
[0012] Preferably, a rotating block one is fixedly connected to the top of the hopper push plate, a rotating block two is hinged to the top of the rotating block one, a telescopic rod is fixedly connected to the top of the rotating block two, a spring is sleeved on the outside of the telescopic rod and the spring is in a compressed state, and a limiting block two is provided on one side of the feeding mechanism housing and the limiting block two is in close contact with the hopper push plate.
[0013] By adopting the above technical solution, when the hopper rotating plate rotates, rotating block one and rotating block two also rotate. Relying on the elasticity of the spring, the hopper push plate is pressed against the top of the hopper rotating plate.
[0014] Preferably, a slider is fixedly connected to the top of the telescopic rod. The slider is L-shaped, and a hole is provided at the end of the slider away from the telescopic rod. A limiting rod is slidably provided inside the hole. Limiting blocks are fixedly connected to both ends of the limiting rod, and the bottom of the limiting blocks is fixedly connected to the top of the feeding mechanism housing.
[0015] By adopting the above technical solution, the sliding trajectory of the hopper push plate on the top of the hopper rotating plate is fixed, which prevents the hopper push plate from deflecting during the sliding process and reduces the friction generated between the hopper push plate and the inner wall of the vibrating hopper during the sliding process.
[0016] Preferably, a slider groove is provided on one side of the hopper push plate, a second mounting bracket is provided on one side of the feeding mechanism housing, a second motor is fixedly mounted on one side of the second mounting bracket, a rack hole is provided on one side of the feeding mechanism housing, a rack body is slidably mounted inside the rack hole, a gear is meshed on one side of the rack body, the gear is fixedly connected to the output end of the second motor, a second slider is provided on the side of the rack body away from the gear, the slider groove is "convex" shaped, and the second slider is slidably connected to the slider groove.
[0017] By adopting the above technical solution, the material hopper push plate can be moved along the upper surface of the material hopper rotating plate to push the raw materials into the reaction chamber, thus avoiding the residue of raw materials on the top of the material hopper rotating plate.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] 1. This utility model uses a cam to drive the vibrating hopper to move up and down, so that the plastic raw material is separated from impurities. Smaller but denser foreign objects pass through the rotating plate of the hopper, while less dense packaging bag residues are blown by the fan to the hopper push plate and move upward along the inclined surface of the hopper push plate, ultimately reducing foreign objects and packaging bag residues in the plastic raw material.
[0020] 2. This utility model uses an adjustable angle rotating plate in the hopper to allow pure plastic raw materials to slide into the reaction chamber by gravity. If there are raw materials that cannot slide, the push plate can push the plastic raw materials that cannot slide naturally into the reaction chamber, thus avoiding waste of plastic raw materials and preventing the filter holes from becoming clogged. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0022] Figure 2 This is a schematic diagram of the main structure of the present utility model;
[0023] Figure 3 This is a schematic diagram of the bottom structure of the main body of this utility model;
[0024] Figure 4 This is a schematic diagram of part A of the present utility model;
[0025] Figure 5 This is a schematic diagram of the vibrating hopper structure of this utility model;
[0026] Figure 6 This is a schematic diagram of the rear structure of the main body of this utility model;
[0027] Figure 7 This is a schematic diagram of part B of the present utility model;
[0028] Figure 8This is a schematic diagram of the material hopper push plate and its auxiliary parts of this utility model.
[0029] In the diagram: 1. Feeding mechanism housing; 2. Vibrating hopper; 3. Hopper rotating plate; 4. Motor 1; 5. Cam; 6. Mounting support 1; 7. Hydraulic push rod; 8. Push plate; 9. Rotating shaft; 10. Elastic pad; 11. Hopper push plate; 12. Rotating block 1; 13. Rotating block 2; 14. Telescopic rod; 15. Spring; 16. Slider 1; 17. Hole 3; 18. Limiting rod; 19. Limiting block 1; 20. Rack hole; 21. Rack body; 22. Gear; 23. Motor 2; 24. Slider 2; 25. Slider groove; 26. Fan; 27. Reaction chamber; 28. Mounting support 2; 29. Hole 1; 30. Hole 2; 31. Ventilation hole; 32. Filter hole; 33. Conveyor belt; 34. Limiting block 2. Detailed Implementation
[0030] 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.
[0031] The following describes an embodiment of this utility model based on its overall structure.
[0032] like Figures 1 to 8 As shown, this utility model provides a feeding mechanism for a plastic extruder, including a feeding mechanism housing 1, a vibrating hopper 2 slidably disposed inside the feeding mechanism housing 1, a ventilation hole 31 opened on one side of the vibrating hopper 2, a hopper rotating plate 3 rotatably connected to the middle of the vibrating hopper 2, a filter hole 32 opened on the hopper rotating plate 3, a hopper push plate 11 slidably disposed on the upper side of the hopper rotating plate 3, a motor 4 fixedly connected to the outer side of the feeding mechanism housing 1, a cam 5 fixedly connected to the output end of the motor 4, the top of the cam 5 closely attached to the bottom of the vibrating hopper 2, mounting supports 6 provided on both sides of the feeding mechanism housing 1, a fan 26 provided on one side of the feeding mechanism housing 1, a conveyor belt 33 provided below the fan 26, and a reaction chamber 27 provided below the conveyor belt 33.
[0033] A rotating shaft 9 is provided through one side of the rotating plate 3 of the hopper. Holes 29 are provided on both sides of the outer shell 1 of the feeding mechanism. Holes 30 are provided on both sides of the vibrating hopper 2. The rotating shaft 9 passes through holes 29 and 30. Elastic pads 10 are fitted on the outer sides of both ends of the rotating shaft 9. The elastic pads 10 do not contact the outer shell 1 of the feeding mechanism. The elastic pads 10 directly contact the vibrating hopper 2 and generate compression. The rotating plate 3 of the hopper can rotate around the rotating shaft 9. Since the vibrating hopper 2 is in a vibrating state, the diameter of the rotating shaft 9 is smaller than the diameter of hole 29. During vibration, the rotating shaft 9 does not collide with the outer shell 1 of the feeding mechanism. The rotating shaft 9 is fixed in hole 30 by the elastic pads 10 fitted on the outside. The elastic pads 10 can reduce the impact between the rotating shaft 9 and the vibrating hopper 2 caused by vibration.
[0034] The top of the mounting bracket 6 is fixedly connected to a hydraulic push rod 7. The output end of the hydraulic push rod 7 is hinged to a push plate 8. The top of the push plate 8 presses against the bottom of the rotating plate 3 of the hopper. The mounting bracket 6 is part of the outer shell 1 of the feeding mechanism and will not vibrate with the vibrating hopper 2. The height of the push plate 8 can be adjusted by adjusting the extension of the hydraulic push rod 7, so that the rotating plate 3 of the hopper can rotate. At the same time, the push plate 8 rotates around the hinge, so that the top of the push plate 8 is always in close contact with the bottom of the rotating plate 3 of the hopper.
[0035] A rotating block 12 is fixedly connected to the top of the hopper push plate 11. A rotating block 2 13 is hinged to the top of the rotating block 12. A telescopic rod 14 is fixedly connected to the top of the rotating block 2 13. A spring 15 is sleeved on the outside of the telescopic rod 14 and the spring 15 is in a compressed state. A limiting block 2 34 is provided on one side of the feeding mechanism housing 1 and the limiting block 2 34 is in close contact with the hopper push plate 11. When the hopper rotating plate 3 rotates, the rotating block 12 and the rotating block 2 13 also rotate. Relying on the elasticity of the spring 15, the hopper push plate 11 is pressed against the top of the hopper rotating plate 3.
[0036] A slider 16 is fixedly connected to the top of the telescopic rod 14. The slider 16 is L-shaped. A hole 17 is opened at the end of the slider 16 away from the telescopic rod 14. A limiting rod 18 is slidably provided inside the hole 17. Limiting blocks 19 are fixedly connected to both ends of the limiting rod 18. The bottom of the limiting blocks 19 is fixedly connected to the top of the feeding mechanism housing 1, which fixes the sliding trajectory of the hopper push plate 11 on the top of the hopper rotating plate 3, prevents the hopper push plate 11 from deflecting during the sliding process, and reduces the friction generated between the hopper push plate 11 and the inner wall of the vibrating hopper 2 during the sliding process.
[0037] A slider groove 25 is provided on one side of the hopper push plate 11. A mounting support 28 is provided on one side of the feeding mechanism housing 1. A motor 23 is fixedly mounted on one side of the mounting support 28. A rack hole 20 is provided on one side of the feeding mechanism housing 1. A rack body 21 is slidably mounted inside the rack hole 20. A gear 22 is meshed on one side of the rack body 21. The gear 22 is fixedly connected to the output end of the motor 23. A slider 24 is provided on the side of the rack body 21 away from the gear 22. The slider groove 25 is "convex". The slider 24 is slidably connected to the slider groove 25, which can push the hopper push plate 11 along the upper surface of the hopper rotating plate 3 to push the raw material into the reaction chamber 27 and prevent the raw material from remaining on the top of the hopper rotating plate 3.
[0038] This utility model includes a power supply, a controller, and a switch, which are not the main technical points of this patent and will not be described in detail. The wiring diagram of the motor in this utility model is common knowledge in the field, and its working principle is already known technology. The appropriate model should be selected according to actual use, so the control method and wiring layout of the motor will not be explained in detail.
[0039] The working principle and process of a feeding mechanism for a plastic extruder:
[0040] Pour the plastic raw materials into the vibrating hopper 2, turn on the motor 4 to begin removing impurities. The motor 4 drives the cam 5 to rotate, and the edge of the cam 5 always remains in close contact with the bottom of the vibrating hopper 2. The rotation of the cam 5 causes the vibrating hopper 2 to move up and down. The up and down movement of the vibrating hopper 2 reduces the squeezing pressure between the plastic raw materials, creating gaps between each piece of plastic raw material and the surrounding plastic raw materials. Smaller foreign objects and packaging residues can move through these gaps to the surface of the plastic raw materials as a whole. Smaller foreign objects move through the filter holes 32 to the outside of the feeding mechanism housing 1. Under the blowing of the fan 26, the packaging residues can be further removed. The material moves along the inclined surface of the hopper push plate 11 to the outside of the feeding mechanism housing 1. After the impurities are removed, the hydraulic push rod 7 moves downward, and the hopper rotating plate 3 also tilts accordingly. The plastic material slides downward, and the motor 23 rotates to drive the rack body 21 to move, pushing the hopper push plate 11 downward. The plastic material reaches the top of the conveyor belt 33 and is then transported to the reaction chamber 27 for processing. After the plastic material is conveyed, the hydraulic push rod 7 moves upward, and the motor 23 reverses, moving the hopper push plate 11 in the opposite direction. When the hopper push plate 11 moves to the limit block 34, the next feeding can begin.
[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0042] 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 feed mechanism for a plastic extruder comprising a feed mechanism housing (1) characterised in that: The inner side of the outer shell (1) of the feeding mechanism is provided with a vibrating hopper (2). A ventilation hole (31) is opened on one side of the vibrating hopper (2). A hopper rotating plate (3) is rotatably connected to the middle of the vibrating hopper (2). A filter hole (32) is opened on the hopper rotating plate (3). A hopper push plate (11) is slidably provided on the upper side of the hopper rotating plate (3). A motor (4) is fixedly connected to the outer side of the outer shell (1) of the feeding mechanism. A cam (5) is fixedly connected to the output end of the motor (4). The top of the cam (5) is close to the bottom of the vibrating hopper (2). Mounting supports (6) are provided on both sides of the outer shell (1) of the feeding mechanism. A fan (26) is provided on one side of the outer shell (1) of the feeding mechanism. A conveyor belt (33) is provided below the fan (26). A reaction chamber (27) is provided below the conveyor belt (33).
2. The feeding mechanism of a plastic extruder according to claim 1, characterized in that: A rotating shaft (9) is provided through one side of the rotating plate (3) of the hopper. Holes 1 (29) are provided on both sides of the outer shell (1) of the feeding mechanism. Holes 2 (30) are provided on both sides of the vibrating hopper (2). The rotating shaft (9) passes through holes 1 (29) and holes 2 (30). Elastic pads (10) are sleeved on the outer sides of both ends of the rotating shaft (9). The elastic pads (10) do not contact the outer shell (1) of the feeding mechanism. The elastic pads (10) directly contact the vibrating hopper (2) and generate compression.
3. The feeding mechanism of a plastic extruder according to claim 1, characterized in that: The top of the mounting support (6) is fixedly connected to a hydraulic push rod (7), and the output end of the hydraulic push rod (7) is hinged to a push plate (8). The top of the push plate (8) presses against the bottom of the rotating plate (3) of the hopper.
4. The feeding mechanism of a plastic extruder according to claim 1, characterized in that: A rotating block one (12) is fixedly connected to the top of the material hopper push plate (11). A rotating block two (13) is hinged to the top of the rotating block one (12). A telescopic rod (14) is fixedly connected to the top of the rotating block two (13). A spring (15) is sleeved on the outside of the telescopic rod (14) and the spring (15) is in a compressed state. A limiting block two (34) is provided on one side of the feeding mechanism housing (1) and the limiting block two (34) is in close contact with the material hopper push plate (11).
5. The feeding mechanism of a plastic extruder according to claim 4, characterized in that: The top of the telescopic rod (14) is fixedly connected to a slider (16), which is L-shaped. The end of the slider (16) away from the telescopic rod (14) has a hole (17). A limiting rod (18) is slidably provided inside the hole (17). The two ends of the limiting rod (18) are fixedly connected to a limiting block (19). The bottom of the limiting block (19) is fixedly connected to the top of the feeding mechanism housing (1).
6. The feeding mechanism of a plastic extruder according to claim 1, characterized in that: A slider groove (25) is provided on one side of the hopper push plate (11). A mounting support (28) is provided on one side of the feeding mechanism housing (1). A motor (23) is fixedly provided on one side of the mounting support (28). A rack hole (20) is provided on one side of the feeding mechanism housing (1). A rack body (21) is slidably provided inside the rack hole (20). A gear (22) is meshed on one side of the rack body (21). The gear (22) is fixedly connected to the output end of the motor (23). A slider (24) is provided on the side of the rack body (21) away from the gear (22). The slider groove (25) is "convex". The slider (24) is slidably connected to the slider groove (25).