A plastic extruder feed device

Abstract

The utility model relates to a kind of plastic extruder feeding device, including conveying cylinder, storage tank is installed on conveying cylinder, storage tank is used to store plastic raw materials, end cap is installed on storage tank, feeding inlet is opened on end cap, feeding pipe is installed on end cap, the top of feeding pipe is communicated with feeding inlet, the bottom of feeding pipe is coaxially installed with mounting seat, feeding pipe is used to communicate feeding inlet and mounting seat and supply plastic raw materials circulation, electromagnetic assembly is installed on mounting seat, and electromagnetic assembly includes coil coaxially installed on mounting seat.The utility model is provided with feeding pipe, mounting seat, coil, core and grating, which facilitates the circulation of raw materials from the middle of the core, the coil can generate a magnetic field when the current is on to magnetize the core and the grating, the grating expands the contact surface with the raw materials, and the grating contacts the metal particles in the raw materials to achieve adsorption, thereby avoiding small particles of metal from falling into the storage tank, thereby improving the safety and stability of raw material transportation.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing equipment, specifically a feeding device for a plastic extruder. Background Technology

[0002] The feeding device of a plastic extruder is a key unit connecting the plastic raw material storage and extrusion system. Its core definition is: to transport solid plastic raw materials (granules, powders or recycled materials) to the extruder barrel in a stable, uniform and continuous manner. The feeding device of a plastic extruder directly affects the uniformity of the extruded product quality and production efficiency. The feeding device of a plastic extruder mainly consists of three core components that work together to achieve the feeding function. The first is the hopper, which serves as a raw material storage container. Its narrow bottom design guides the raw material to fall in a concentrated manner. The second is the feeding screw (or feed inlet guide structure). Small and medium-sized extruders often use a single screw, which is driven by a motor to rotate and pushes the raw material through the screw channel. The third is the hopper base and material control components. The base connects the hopper and the barrel and has a built-in flow regulating baffle or sensor to control the feed rate in real time. Some devices include a vibrator to prevent the raw material from clogging at the bottom of the hopper through slight vibration. During operation, existing plastic extruder feeding devices may contain metal particles mixed in with the plastic granules. Metal particles are much harder than the screw and barrel, and may scrape the screw threads and the inner wall of the barrel, causing the gap between them to widen, reducing plasticization uniformity, and potentially jamming the screw, causing motor overload damage, and affecting the service life of the equipment. At the same time, metal particles may embed into the finished plastic product, forming impurities, leading to reduced product strength, appearance defects, and even production accidents. High-speed friction between metal and equipment may generate sparks, which can easily induce fires if the raw material is flammable plastic. In addition, the detachment of damaged equipment parts may cause mechanical failures and interrupt production. Utility Model Content

[0003] The technical problem to be solved by this utility model is that when the existing plastic extruder feeding device is in use, metal particles may be mixed in the plastic raw material, which will cause scratch damage to the screw and the barrel wall, affecting the conveying of raw plastic and thus affecting the service life of the equipment.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A feeding device for a plastic extruder includes a conveying cylinder, a storage tank installed on the conveying cylinder, the storage tank being used to store plastic raw materials, an end cover installed on the storage tank, a feed port opened on the end cover, a feed pipe installed on the end cover, the top end of the feed pipe being connected to the feed port, and a mounting base coaxially installed at the bottom end of the feed pipe, the feed pipe being used to connect the feed port and the mounting base and to supply plastic raw materials for flow, an electromagnetic component installed on the mounting base, the electromagnetic component including a coil coaxially installed on the mounting base, an iron core clamped on the mounting base, and a grid mesh fixedly connected to the iron core, the iron core being inserted in the middle of the coil, and the coil being used to magnetize the iron core and the grid mesh when current flows through it, and a screw rod coaxially rotatably connected to the conveying cylinder, the screw rod being used to push the plastic particles to move linearly.

[0005] The beneficial effects of this utility model are: by setting up a feed pipe, mounting base, coil, iron core and grid, the raw materials can flow through the middle of the iron core. When the coil is connected to the current, it can generate a magnetic field to magnetize the iron core and grid. The grid expands the contact area with the raw materials. When the grid comes into contact with the metal particles in the raw materials, it can be adsorbed, thereby preventing small metal particles from falling into the storage tank, thus improving the safety and stability of raw material transportation.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, a first motor is installed on the conveying cylinder, and the output end of the first motor is fixedly connected to one end of the screw rod. The first motor is used to drive the screw rod to rotate, thereby improving the rotation efficiency of the screw rod.

[0008] Furthermore, the mounting base has a first slot, and the iron core is in the shape of a ring. The iron core is engaged in the middle of the first slot, which improves the stability of the iron core installation.

[0009] Furthermore, a collection hopper is installed on the mounting base, and the collection hopper is connected to the mounting base. A connecting pipe is inserted into the collection hopper, and one end of the connecting pipe passes through the storage tank. The connecting pipe is used to discharge metal particles inside the collection hopper, which improves the convenience of metal particle discharge.

[0010] Furthermore, a fan is installed on the conveying cylinder, and the air inlet of the fan is connected to a connecting pipe. A filter is installed on the connecting pipe, and a filter screen is installed on the filter to filter the air and collect metal particles, thereby improving the efficiency of metal particle discharge.

[0011] Furthermore, an arc-shaped cover plate is rotatably connected to the inner wall of the mounting base near the hopper, and a second slot is provided on the mounting base for the arc-shaped cover plate to slide.

[0012] Furthermore, a drive assembly is provided on the mounting base, which includes a second motor fixedly connected to the mounting base, a gear fixedly connected to the output end of the second motor, and a toothed plate fixedly connected to the arc-shaped cover plate.

[0013] Furthermore, the gear and the toothed plate mesh, and a third slot is provided on the mounting base. The third slot is connected to the second slot and allows the gear to rotate. Limit blocks are fixedly connected to both ends of the toothed plate. The second motor is used to drive the gear to rotate. The gear drives the arc-shaped cover plate and the toothed plate to slide in the middle of the second slot. The limit blocks are used to limit the gear and improve the rotational stability of the arc-shaped cover plate.

[0014] The beneficial effects of adopting the above-mentioned further solution are as follows: by setting up a collection hopper, connecting pipe, fan and filter, the current of the coil is disconnected and then the filter is restarted, which can create a negative pressure in the collection hopper, thereby sucking metal particles into the filter for filtration, thus improving the efficiency of cleaning the surface of the grid; by setting up a second motor, gear, arc-shaped cover plate, toothed plate, second slot and third slot, starting the second motor can drive the gear to rotate, thereby driving the arc-shaped cover plate to close the collection hopper, improving the stability of the raw material flow installation base. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the feed pipe structure of this utility model; Figure 4 This is a schematic diagram of the core structure of this utility model; Figure 5 This is a schematic diagram of the cover plate structure of this utility model; Figure 6 This is a cross-sectional view of the mounting base of this utility model; The attached diagram lists the components represented by each number as follows: 1. Conveying cylinder; 2. Storage tank; 3. End cover; 4. Feed inlet; 5. Connecting pipe; 6. Fan; 7. Filter; 8. Screw rod; 9. Feed pipe; 10. Mounting base; 11. Collection hopper; 12. First motor; 13. Second motor; 14. Gear; 15. Coil; 16. Iron core; 17. Grating; 18. Arc-shaped cover plate; 19. Toothed plate; 20. Limiting block; 21. First slot; 22. Second slot; 23. Third slot. Detailed Implementation

[0016] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0017] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0018] like Figure 1-6As shown, a feeding device for a plastic extruder includes a conveying cylinder 1, on which a storage tank 2 is installed. The storage tank 2 is used to store plastic raw materials. The storage tank 2 and the conveying cylinder 1 are connected to facilitate the plastic raw materials falling into the conveying cylinder 1 under their own weight. The inner wall of the storage tank 2 is coated with polytetrafluoroethylene to improve the smoothness and wear resistance of the side wall. A screw rod 8 is coaxially rotatably connected to the conveying cylinder 1. A first motor 12 is bolted to the conveying cylinder 1. The output end of the first motor 12 is fixedly connected to one end of the screw rod 8 through a coupling. Starting the first motor 12 drives the screw rod 8 to rotate. When the screw rod 8 rotates, it pushes the conveying cylinder 1 through the helical blades. The plastic granules inside cylinder 1 move linearly. A heating component can be installed on cylinder 1 to heat and melt the plastic granules. Storage tank 2 is equipped with an end cap 3, which has a feed inlet 4 for injecting plastic raw materials into storage tank 2. A feed pipe 9 is bolted to end cap 3, with its top end connected to the feed inlet 4. A mounting base 10 is coaxially mounted on the bottom end of feed pipe 9. Both feed pipe 9 and mounting base 10 are made of plastic and have good insulation properties. Feed pipe 9 connects feed inlet 4 and mounting base 10 and allows plastic raw materials to flow through. An electromagnetic component is mounted on mounting base 10, including a coil 15 coaxially mounted on mounting base 10. The iron core 16 is snapped onto the mounting base 10, and the grid mesh 17 is fixedly connected to the iron core 16. The mounting base 10 has a first slot 21. The iron core 16 is made of metal and is circular in shape. The iron core 16 is snapped into the middle of the first slot 21 and inserted into the middle of the coil 15. Under the action of the external magnetic field, the tiny magnetic units of the magnetic domains inside the iron core 16 change from a disordered arrangement to a state consistent with the direction of the magnetic field, forming a unified additional magnetic field, making the iron core 16 exhibit strong magnetism as a whole, thus enabling the electromagnet to attract magnetic materials. When the coil 15 is de-energized, the external magnetic field disappears, the magnetic domains of the iron core 16 return to a disordered arrangement, and the magnetism disappears rapidly. The iron core 16 achieves... The magnetic field can be controlled to switch. The grid 17 and the iron core 16 are fixedly connected together, so that the grid 17 can be magnetized along with the iron core 16. When the coil 15 carries current, it is used to magnetize the iron core 16 and the grid 17. By setting up the feed pipe 9, mounting base 10, coil 15, iron core 16 and grid 17, the raw materials can flow through the middle of the iron core 16. The grid 17 expands the contact area with the raw materials. When the coil 15 carries current, it can generate a magnetic field to magnetize the iron core 16 and the grid 17. When the grid 17 comes into contact with the metal particles in the raw materials, it can be adsorbed, thereby preventing small metal particles from falling into the storage tank 2, thus improving the safety and stability of the raw material transportation.

[0019] like Figure 1-3As shown, a hopper 11 is installed on the mounting base 10, and the hopper 11 is connected to the mounting base 10. A connecting pipe 5 is inserted into the hopper 11, and one end of the connecting pipe 5 passes through the storage tank 2. The connecting pipe 5 is used to discharge the metal particles inside the hopper 11. A blower 6 is installed on the conveying cylinder 1, and the air inlet of the blower 6 is connected to the connecting pipe 5. A filter 7 is installed on the connecting pipe 5, and a filter screen is installed on the filter 7 to filter the air and collect metal particles. By setting up the hopper 11, the connecting pipe 5, the blower 6, and the filter 7, the current of the coil 15 can be disconnected and the filter 7 can be restarted to make the hopper 11 form a negative pressure, thereby sucking the metal particles into the filter 7 for filtration, thereby improving the surface cleaning efficiency of the grid 17.

[0020] like Figure 2-6 As shown, an arc-shaped cover plate 18 is rotatably connected to the inner wall of the mounting base 10 near the hopper 11. A second slot 22 is provided on the mounting base 10, allowing the arc-shaped cover plate 18 to slide. A drive assembly is provided on the mounting base 10, which includes a second motor 13 fixedly connected to the mounting base 10, a gear 14 fixedly connected to the output end of the second motor 13, and a toothed plate 19 fixedly connected to the arc-shaped cover plate 18. The gear 14 and the toothed plate 19 mesh with each other. A third slot 23 is provided on the mounting base 10, which communicates with the second slot 22 and allows the gear 14 to rotate. Limit blocks 20 are fixedly connected to both ends of the toothed plate 19. The second motor 13 drives the gear 14 to rotate, causing the arc-shaped cover plate 18 and the toothed plate 19 to slide in the middle of the second slot 22. Starting the second motor 13 can drive the gear 14 to rotate, thereby causing the arc-shaped cover plate 18 to close the hopper 11, improving the stability of the raw material flow mounting base 10.

[0021] In actual use, an electric actuator can be used to replace the second motor 13, gear 14 and toothed plate 19. The electric actuator is installed at one end of the mounting base 10. The output end of the mounting base 10 is fixedly connected to the arc-shaped cover plate 18. The mounting base 10 has a sliding groove for the arc-shaped cover plate 18 to slide. The sliding groove is connected to the hopper 11. By starting the electric actuator, the arc-shaped cover plate 18 can be pushed to slide in the sliding groove to close the hopper 11, thereby preventing the raw material from falling into the hopper 11 when it slides down the mounting base 10.

[0022] Working principle: When using this type of plastic extruder feeding device, the operator first connects an external power supply and pours the raw material into the storage tank 2 through the feed port 4 for temporary storage. The raw material flows steadily through the feed pipe 9 to the iron core 16. When the coil 15 is connected to current, it generates a magnetic field that magnetizes the iron core 16 and the grid 17. The grid 17 expands the contact surface with the raw material. When the grid 17 comes into contact with metal particles in the raw material, it achieves adsorption, thereby preventing small metal particles from falling into the storage tank 2. The plastic raw material slides down through the gaps in the grid 17 into the storage tank 2, and then falls into the conveying cylinder 1. The first motor 12 is started to drive the screw 8 to rotate. When the screw 8 rotates, it pushes the plastic particles inside the conveying cylinder 1 to move linearly through the screw blades, thereby realizing the conveying of plastic.

[0023] 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, improvements, etc., 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 feeding device for a plastic extruder, characterized in that: The system includes a conveyor cylinder (1), a storage tank (2) installed on the conveyor cylinder (1), the storage tank (2) being used to store plastic raw materials, an end cap (3) installed on the storage tank (2), an inlet (4) opened on the end cap (3), an inlet pipe (9) installed on the end cap (3), the top end of the inlet pipe (9) being connected to the inlet (4), and a mounting base (10) coaxially installed at the bottom end of the inlet pipe (9), the inlet pipe (9) being used to connect the inlet (4) and the mounting base (10) and to supply plastic raw materials for circulation, and the mounting base... An electromagnetic assembly is installed on (10). The electromagnetic assembly includes a coil (15) coaxially mounted on the mounting base (10), an iron core (16) snapped onto the mounting base (10), and a grid mesh (17) fixedly connected to the iron core (16). The iron core (16) is inserted into the middle of the coil (15). When current flows through the coil (15), it is used to magnetize the iron core (16) and the grid mesh (17). A screw rod (8) is coaxially rotatably connected to the conveying cylinder (1). The screw rod (8) is used to push the plastic particles to move linearly.

2. The feeding device for a plastic extruder according to claim 1, characterized in that, A first motor (12) is installed on the conveying cylinder (1). The output end of the first motor (12) is fixedly connected to one end of the screw rod (8). The first motor (12) is used to drive the screw rod (8) to rotate.

3. The feeding device for a plastic extruder according to claim 1, characterized in that, The mounting base (10) has a first slot (21) and the iron core (16) is in the shape of a ring. The iron core (16) is engaged in the middle of the first slot (21).

4. The feeding device for a plastic extruder according to claim 3, characterized in that, A collection hopper (11) is installed on the mounting base (10). The collection hopper (11) is connected to the mounting base (10). A connecting pipe (5) is inserted into the collection hopper (11). One end of the connecting pipe (5) passes through the storage tank (2). The connecting pipe (5) is used to discharge the metal particles inside the collection hopper (11).

5. A feeding device for a plastic extruder according to claim 2, characterized in that, A fan (6) is installed on the conveying cylinder (1). The air inlet of the fan (6) is connected to the connecting pipe (5). A filter (7) is installed on the connecting pipe (5). A filter screen is installed on the filter (7) to filter the air and collect metal particles.

6. A feeding device for a plastic extruder according to claim 4, characterized in that, The mounting base (10) is rotatably connected to the inner wall of the hopper (11) with an arc-shaped cover plate (18). The mounting base (10) has a second slot (22) for the arc-shaped cover plate (18) to slide.

7. A feeding device for a plastic extruder according to claim 6, characterized in that, The mounting base (10) is provided with a drive assembly, which includes a second motor (13) fixedly connected to the mounting base (10), a gear (14) fixedly connected to the output end of the second motor (13), and a toothed plate (19) fixedly connected to the arc-shaped cover plate (18).

8. A feeding device for a plastic extruder according to claim 7, characterized in that, The gear (14) and the toothed plate (19) mesh with each other. The mounting base (10) has a third slot (23) which is connected to the second slot (22). The third slot (23) is used for the gear (14) to rotate. Limit blocks (20) are fixedly connected to both ends of the toothed plate (19). The second motor (13) is used to drive the gear (14) to rotate. The gear (14) drives the arc-shaped cover plate (18) and the toothed plate (19) to slide in the middle of the second slot (22).

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