Screw extruder for rubber tube production

Abstract

The invention relates to a screw extruder for rubber pipe production, which comprises a screw conveying pipe, the bottom of the screw conveying pipe is fixedly connected with a support, the top of the support is fixedly connected with a motor, the driving end of the motor is fixedly connected with a transmission mechanism, and the driving end of the transmission mechanism is fixedly connected to one end of the screw conveying pipe. The top of the screw conveying pipe is fixedly connected with a hopper, the inner wall of the hopper is rotationally connected with a linkage assembly fixed to the exterior of the driving end of the motor, the exterior of the linkage assembly is eccentrically and fixedly connected with an extrusion roller, the front side and the rear side of the hopper are fixedly connected with mounting plates, and the inner walls of the mounting plates are slidably connected with a plurality of elastic assemblies. According to the device, the extrusion plate is periodically impacted by the extrusion roller, and high-frequency vibration is formed in cooperation with telescopic reset of the elastic assembly, so that the problems of caking and adhesion of rubber raw materials caused by moisture can be solved quickly, blockage of the feeding channel of the hopper can be avoided, and feeding uniformity and stable operation of the device are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of rubber extrusion equipment technology, specifically a screw extruder for rubber hose production. Background Technology

[0002] Rubber extrusion equipment technology is a core molding technology in the rubber processing field. It is an integrated process that achieves continuous conveying, heating, plasticizing, and pressurized extrusion of rubber raw materials through mechanical structures. Its core principle is to use the cooperation of a screw and barrel to shear, mix, and melt solid rubber materials, and then extrude them through a die of a specific shape to form various rubber product blanks such as pipes, profiles, and seals. This technology integrates knowledge from multiple disciplines such as materials mechanics, thermodynamics, and mechanical design. It features high molding efficiency, standardized product specifications, and adaptability to various rubber materials, making it a key technological support for large-scale production in the rubber industry.

[0003] The screw extruder for rubber hose production is a specialized application of the aforementioned technology in rubber hose manufacturing. It uses the screw as the core actuator, combined with a feeding device, heating system, die head, and cooling mechanism. The screw speed, plasticizing temperature, and die flow channel design are optimized to meet the molding requirements of rubber hoses. During operation, the rubber raw material enters the barrel through the feed inlet, undergoes plasticizing and melting under the screw's push, and is finally continuously extruded through a tubular die to form a rubber hose blank. It allows for precise control of the hose's inner diameter, wall thickness, and surface smoothness, making it a core specialized piece of equipment for rubber hose production in the automotive and industrial piping industries.

[0004] However, in existing technologies, some screw extruders used for rubber hose production experience problems when conveying raw materials. If the rubber material becomes damp, is compressed during storage, or clumps or sticks together, it easily adheres to the inner wall of the hopper, causing material to accumulate in the feed channel and eventually block the hopper. In this case, manual cleaning with tools is required, increasing labor costs and causing equipment downtime, severely impacting production continuity. Summary of the Invention

[0005] The purpose of this invention is to provide a screw extruder for rubber hose production.

[0006] The objective of this invention is achieved through the following technical solution: a screw extruder for producing rubber hoses, comprising a screw conveyor pipe, a support fixedly connected to the bottom of the screw conveyor pipe, a motor fixedly connected to the top of the support, a transmission mechanism fixedly connected to the drive end of the motor, the drive end of the transmission mechanism fixedly connected to one end of the screw conveyor pipe, a hopper fixedly connected to the top of the screw conveyor pipe, a linkage assembly fixed to the outside of the motor drive end rotatably connected to the inner wall of the hopper, an extrusion roller fixedly connected eccentrically to the outside of the linkage assembly, mounting plates fixedly connected to both the front and rear sides of the hopper, multiple elastic components slidably connected to the inner wall of the mounting plates, an installation box fixedly connected to the other end of the multiple elastic components, and an extrusion plate detachably connected to the inner wall of the installation box.

[0007] As a further description of the above technical solution:

[0008] The linkage assembly includes a rotating rod that rotates on the inner wall of the hopper. A first rotating wheel is fixedly connected to the left side of the rotating rod. A second rotating wheel is fixedly connected to the outside of the drive end of the motor. A belt is sleeved on the outside of the first and second rotating wheels. The inner wall of the extrusion roller is fixedly connected to the outside of the rotating rod.

[0009] As a further description of the above technical solution:

[0010] A sealing cover is rotatably connected to the outside of the rotating rod, and one side of the sealing cover is fixedly connected to the left side of the hopper;

[0011] As a further description of the above technical solution:

[0012] The mounting plate is rotatably connected to a slope plate, and side covers are fixedly connected to both the left and right sides of the slope plate. The inner wall of the side cover is fixedly connected to the top of the hopper, and a baffle that is in close contact with the bottom of the side cover is fixedly connected to the inner side of the slope plate.

[0013] As a further description of the above technical solution:

[0014] The elastic component includes a slide rod that slides on the inner wall of the mounting plate. One end of the slide rod is fixedly connected to a limit block, and the other end of the slide rod is fixedly connected to one side of the mounting box. A spring is sleeved on the outside of the slide rod.

[0015] As a further description of the above technical solution:

[0016] One end of the spring is fixedly connected to one side of the mounting plate, and the other end of the spring is fixedly connected to one side of the limiting block;

[0017] As a further description of the above technical solution:

[0018] Limiting strips are fixedly connected to both the left and right sides of the mounting box. Multiple plastic balls that fit and snap onto the inner wall of the mounting box are movably connected to the outer side of the limiting strips. A capping block is fixedly connected to the top of the limiting strips.

[0019] As a further description of the above technical solution:

[0020] A buffer pad is fixedly connected to the outer side of the mounting box, and a buffer pad is fixedly connected to the inner side of the mounting plate.

[0021] Compared with the prior art, the advantages of the present invention are as follows:

[0022] 1. In this invention, the screw conveyor pipe is driven to rotate by the synchronous motor and the linkage component drives the eccentric extrusion roller to rotate. The extrusion roller periodically impacts the extrusion plate. The extension and resetting of the slide rod and spring in the elastic component form a high-frequency vibration, which can quickly solve the problem of caking and sticking of rubber raw materials caused by moisture, and avoid blockage of the hopper feed channel, ensuring uniform feeding and stable operation of the equipment.

[0023] 2. In this invention, the baffle effectively limits the slope plate, keeping it at a stable tilt angle, ensuring that the input rubber raw material falls accurately to the top of the extrusion roller, and avoiding material deviation that affects the vibration and dispersion effect; the side cover fits tightly against the top of the hopper and both sides of the slope plate, which can completely prevent material from leaking from the gaps and reduce the waste of raw materials.

[0024] 3. In this invention, the obstruction of the mounting box can be removed by rotating the ramp. Combined with the guidance of the limiting strip and the soft fixing structure of the plastic ball, the extrusion plate can be quickly pulled out without complicated tools, making it easy to clean the material residue attached to the surface and avoid residual material affecting the vibration anti-blocking effect or causing the parts to jam. When reinserting after cleaning, the limiting strip ensures accurate installation, the plastic ball ensures fixed stability, and the top block prevents material from seeping into the mounting box, extending the service life of the parts and reducing equipment maintenance costs and downtime. Attached Figure Description

[0025] Figure 1 This is an overall schematic diagram of a screw extruder for producing rubber hoses according to the present invention;

[0026] Figure 2 This is a schematic diagram of the hopper structure of a screw extruder for rubber hose production according to the present invention;

[0027] Figure 3 This is a schematic diagram of the extrusion roller structure of a screw extruder for rubber hose production according to the present invention;

[0028] Figure 4 This is a schematic diagram of the baffle structure of a screw extruder for rubber hose production according to the present invention;

[0029] Figure 5This is a schematic diagram of the buffer pad structure of a screw extruder for rubber hose production according to the present invention;

[0030] Figure 6 This is a schematic diagram of the mounting box structure of a screw extruder for rubber hose production according to the present invention.

[0031] Label Explanation:

[0032] 1. Screw conveyor pipe; 2. Support frame; 3. Motor; 4. Transmission mechanism; 5. Hopper; 6. Rotating rod; 7. Rotary wheel one; 8. Rotary wheel two; 9. Belt; 10. Sealing cover; 11. Extrusion roller; 12. Mounting plate; 13. Slope plate; 14. Side cover; 15. Baffle plate; 16. Sliding rod; 17. Limiting block; 18. Spring; 19. Mounting box; 20. Extrusion plate; 21. Limiting strip; 22. Plastic ball; 23. Top block; 24. Buffer pad one; 25. Buffer pad two. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0034] like Figures 1 to 6 The illustration shows an embodiment of a screw extruder for rubber hose production provided by the present invention. It includes a screw conveyor pipe 1, providing a channel for the plasticizing and conveying of rubber raw materials, ensuring the basic path for subsequent material processing; a bracket 2 is fixedly connected to the bottom of the screw conveyor pipe 1, stably supporting the screw conveyor pipe 1 and the motor 3, ensuring the overall stability of the equipment operation; a motor 3 is fixedly connected to the top of the bracket 2, simultaneously providing two power transmissions: one for the operation of the screw conveyor pipe 1, and the other for the linkage assembly to drive the extrusion roller 11 to rotate; a transmission mechanism 4 is fixedly connected to the drive end of the motor 3, transmitting... The power of the motor 3 is transmitted to the screw conveyor pipe 1, driving the internal screw to rotate and laying the foundation for the plasticizing and conveying of materials; the drive end of the transmission mechanism 4 is fixedly connected to one end of the screw conveyor pipe 1; the top of the screw conveyor pipe 1 is fixedly connected to the hopper 5, which holds the rubber raw materials to be processed, provides storage space for feeding, and provides an installation carrier for the internal linkage structure and anti-blocking structure; the inner wall of the hopper 5 is rotatably connected to the linkage component fixed to the outside of the drive end of the motor 3, which transmits the power of the motor 3 to the extrusion roller 11, realizes the synchronous rotation of the extrusion roller 11, and ensures the realization of the eccentric impact and vibration anti-blocking function.

[0035] The linkage assembly includes a rotating rod 6 that rotates on the inner wall of the hopper 5, supporting and driving the extrusion roller 11 to rotate, while providing an installation base for the first rotating wheel 7 to ensure the stability of power transmission; the first rotating wheel 7 is fixedly connected to the left side of the rotating rod 6, and together with the second rotating wheel 8 and the belt 9, forms a transmission structure to realize the transmission of power from the motor 3 to the rotating rod 6, ensuring the synchronous operation of the linkage assembly; the second rotating wheel 8 is fixedly connected to the external drive end of the motor 3, and is fixed to the drive end of the motor 3. The second rotating wheel 8 is linked to the first rotating wheel 7 through the belt 9, transmitting the power of the motor 3 to the rotating rod 6, providing power support for the rotation of the extrusion roller 11; the belt 9 is sleeved on the outside of the first rotating wheel 7 and the second rotating wheel 8, connecting the first rotating wheel 7 and the second rotating wheel 8 to realize the stable transmission of power and ensure the synchronous operation of all components of the linkage assembly; a sealing cover 10 is rotatably connected to the outside of the rotating rod 6 to seal and limit the connection between the rotating rod 6 and the hopper 5, ensuring the stability of the rotation of the rotating rod 6 and preventing material leakage from gaps or the entry of external impurities; one side of the sealing cover 10 is fixedly connected to the left side of the hopper 5.

[0036] The external eccentric connection of the linkage component is a squeezing roller 11, which is eccentrically fixed to the outside of the rotating rod 6. When rotating, it generates periodic lateral displacement and continuously impacts the squeezing plate 20. In conjunction with the elastic component, it forms high-frequency vibration, which breaks up the material agglomeration and adhesion, and avoids material blockage in the hopper 5. The inner wall of the squeezing roller 11 is fixedly connected to the outside of the rotating rod 6.

[0037] Mounting plates 12 are fixedly connected to both the front and rear sides of the hopper 5, providing a fixed mounting base for the ramp 13 and elastic components, and providing sliding guidance for the slide rod 16, ensuring the stable assembly and operation of all related components. The ramp 13 is rotatably connected to the inner side of the mounting plate 12, maintaining a stable tilt angle under the limit of the baffle 15, ensuring that the input rubber raw material falls accurately to the top of the extrusion roller 11, avoiding material deviation and affecting the vibration effect. Side covers 14 are fixedly connected to both the left and right sides of the ramp 13, tightly fitting the top of the hopper 5 and the sides of the ramp 13, completely preventing material leakage from the gaps, reducing raw material waste, and keeping the feeding area clean. The inner wall of the side cover 14 is fixedly connected to the top of the hopper 5. The baffle 15, which is in close contact with the bottom of the side cover 14, is fixedly connected to the inner side of the ramp 13, effectively limiting the ramp 13, preventing the ramp 13 from overturning, ensuring that it maintains a stable tilt angle, and ensuring the accuracy of material guidance.

[0038] Multiple elastic components are slidably connected to the inner wall of the mounting plate 12, cooperating with the extrusion plate 20 and the extrusion roller 11. High-frequency vibration is generated through the sliding of the slide rod 16 and the extension and retraction of the spring 18, breaking up material agglomerates and buffering impact forces to ensure structural stability. The elastic components include a slide rod 16 that slides along the inner wall of the mounting plate 12, with one end connected to the mounting box 19 and the other end connected to a limiting block 17. This transmits the displacement force of the extrusion plate 20 and provides mounting support for the spring 18, ensuring the extension and retraction function of the elastic components. One end of the slide rod 16 is fixedly connected to the limiting block. 17. Limit the sliding stroke of the slide rod 16 to prevent the slide rod 16 from detaching from the inner wall of the mounting plate 12, and at the same time provide a fixed end point for the spring 18 to ensure that the spring 18 can effectively accumulate and release elastic potential energy; the slide rod 16 is sleeved with a spring 18, which is pulled and accumulates elastic potential energy when the slide rod 16 drives the limit block 17 to move. Then, it quickly resets and drives the slide rod 16, the mounting box 19 and the extrusion plate 20 to rebound, forming high-frequency vibration, which helps to disperse the material and prevent blockage; one end of the spring 18 is fixedly connected to one side of the mounting plate 12, and the other end of the spring 18 is fixedly connected to one side of the limit block 17.

[0039] The other end of multiple elastic components is fixedly connected to the mounting box 19, which provides a detachable installation space for the extrusion plate 20. At the same time, it connects the elastic components to transmit vibration force, ensuring the stable installation and vibration effect of the extrusion plate 20. The other end of the slide rod 16 is fixedly connected to one side of the mounting box 19. The extrusion plate 20 is detachably connected to the inner wall of the mounting box 19. After being impacted by the extrusion roller 11, it drives the mounting box 19 to move, which, together with the elastic components, achieves high-frequency vibration, dispersing material agglomerates. At the same time, its detachable design facilitates cleaning and maintenance.

[0040] Limiting strips 21 are fixedly connected to both the left and right sides of the mounting box 19 to guide the insertion and removal of the extrusion plate 20, ensuring that the extrusion plate 20 falls straight into the inner wall of the mounting box 19, guaranteeing installation accuracy, and limiting the lateral displacement of the extrusion plate 20. Multiple plastic balls 22 that fit and snap onto the inner wall of the mounting box 19 are movably connected to the outer side of the limiting strips 21, making elastic contact with the outer wall of the extrusion plate 20 to achieve soft fixation between the extrusion plate 20 and the mounting box 19, ensuring the stability of the extrusion plate 20 during operation and facilitating the disassembly and cleaning of the extrusion plate 20. A capping block 23 is fixedly connected to the top of the limiting strips 21 to seal the gap at the top of the mounting box 19, preventing material from seeping into the interior of the mounting box 19 from this position, avoiding affecting the fit of the components and extending the service life of the components.

[0041] A buffer pad 24 is fixedly connected to the outside of the mounting box 19, which abuts against the buffer pad 25. The buffer pad 24 cushions the rigid force generated by the impact of the extrusion roller 11 on the extrusion plate 20, preventing the extrusion plate 20 from directly colliding with the inner wall of the hopper 5 and causing wear, while also reducing operating noise. A buffer pad 25 is fixedly connected to the inside of the mounting plate 12, which works with the buffer pad 24 to buffer the rigid impact force, reduce the collision wear between the mounting plate 12 and the mounting box 19, reduce the operating noise of the equipment, and ensure the service life of each structure.

[0042] Working principle: After starting the motor 3, its drive end synchronously realizes two power transmissions. One transmission mechanism 4 drives the screw inside the screw conveyor pipe 1 to rotate, laying the foundation for subsequent material plasticization and conveying. The other transmission drives the externally fixed rotating wheel 8 to rotate, which is linked to the rotating wheel 7 on the left side of the rotating rod 6 inside the hopper 5 through the belt 9. The rotating rod 6 rotates stably under the support and limit of the sealing cover 10. The eccentrically fixed extrusion roller 11 outside the rotating rod 6 rotates together. The eccentric design causes the extrusion roller 11 to generate periodic lateral displacement during rotation, continuously impacting the extrusion plates 20 on both sides inside the hopper 5. At this time, the buffer pad 24 on the outside of the mounting box 19 and the buffer pad 25 on the inside of the mounting plate 12 abut against each other, effectively buffering the rigid force generated by the impact, avoiding wear caused by direct collision between the extrusion plate 20 and the inner wall of the hopper 5, and reducing operating noise.

[0043] When material is fed from the top of hopper 5, the ramp 13 remains tilted under the limiting action of the baffle 15, ensuring that the material falls precisely on the top of the extrusion roller 11. The side cover 14 fits tightly against the top of hopper 5 and both sides of the ramp 13, effectively preventing material leakage from gaps and achieving orderly feeding. When the extrusion plate 20 is moved by the impact force of the extrusion roller 11, the installation box 19 moves, and the installation box 19 simultaneously pulls the slide rod 16 to slide along the inner wall of the installation plate 12. The limiting block 17 at one end of the slide rod 16 moves outward and pulls the spring 18, causing the spring 18 to accumulate elastic potential energy and quickly return to its original position. This, in turn, causes the slide rod 16, the installation box 19, and the extrusion plate 20 to rebound quickly. This cycle forms a high-frequency vibration, which not only solves the problem of material clumping and sticking caused by moisture and avoids material blockage in hopper 5, but also disperses clumped material and ensures uniform feeding.

[0044] After prolonged use, material residue may adhere to the surface of the extrusion plate 20. In this case, the ramp 13 can be rotated to cause the side cover 14 to flip outward, removing the obstruction to the top of the mounting box 19. Then, the extrusion plate 20 can be directly pulled out from the inner wall of the mounting box 19 for cleaning. After cleaning, the extrusion plate 20 is re-aligned with the mounting box 19 and inserted. The limiting strip 21 acts as a guide to ensure that the extrusion plate 20 falls straight into the mounting box 19. The plastic ball 22 achieves soft fixation between the two through elastic contact with the outer wall of the extrusion plate 20, which not only ensures the stability of the extrusion plate 20 during operation but also facilitates disassembly. The top sealing block 23 seals the gap at the top of the mounting box 19 to prevent material from seeping into the interior of the mounting box 19 from this position and affecting the fit of the components. Finally, with the synergistic effect of each structure, stable conveying of rubber raw materials, prevention of blockage and vibration, and convenient maintenance of the equipment are achieved, ensuring the continuous and efficient operation of the screw extruder.

Claims

1. A screw extruder for producing rubber hoses, comprising a screw conveyor pipe (1), characterized in that: A bracket (2) is fixedly connected to the bottom of the screw conveyor pipe (1), a motor (3) is fixedly connected to the top of the bracket (2), a transmission mechanism (4) is fixedly connected to the drive end of the motor (3), the drive end of the transmission mechanism (4) is fixedly connected to one end of the screw conveyor pipe (1), a hopper (5) is fixedly connected to the top of the screw conveyor pipe (1), a linkage component fixed to the outside of the drive end of the motor (3) is rotatably connected to the inner wall of the hopper (5), an extrusion roller (11) is eccentrically fixedly connected to the outside of the linkage component, an installation plate (12) is fixedly connected to both the front and rear sides of the hopper (5), a plurality of elastic components are slidably connected to the inner wall of the installation plate (12), an installation box (19) is fixedly connected to the other end of the plurality of elastic components, and an extrusion plate (20) is detachably connected to the inner wall of the installation box (19).

2. The screw extruder for rubber hose production according to claim 1, characterized in that: The linkage assembly includes a rotating rod (6) that rotates on the inner wall of the hopper (5). A rotating wheel (7) is fixedly connected to the left side of the rotating rod (6). A rotating wheel (8) is fixedly connected to the outside of the drive end of the motor (3). A belt (9) is sleeved on the outside of the rotating wheel (7) and the rotating wheel (8). The inner wall of the extrusion roller (11) is fixedly connected to the outside of the rotating rod (6).

3. The screw extruder for rubber hose production according to claim 2, characterized in that: The rotating rod (6) is rotatably connected to a sealing cover (10), and one side of the sealing cover (10) is fixedly connected to the left side of the hopper (5).

4. The screw extruder for producing rubber hoses according to claim 1, characterized in that: The inner side of the mounting plate (12) is rotatably connected to a slope plate (13), and the left and right sides of the slope plate (13) are fixedly connected to side covers (14). The inner wall of the side cover (14) is fixedly connected to the top of the hopper (5), and the inner side of the slope plate (13) is fixedly connected to a baffle (15) that is in close contact with the bottom of the side cover (14).

5. The screw extruder for rubber hose production according to claim 1, characterized in that: The elastic component includes a slide rod (16) that slides on the inner wall of the mounting plate (12). One end of the slide rod (16) is fixedly connected to a limit block (17), and the other end of the slide rod (16) is fixedly connected to one side of the mounting box (19). A spring (18) is sleeved on the outside of the slide rod (16).

6. The screw extruder for rubber hose production according to claim 5, characterized in that: One end of the spring (18) is fixedly connected to one side of the mounting plate (12), and the other end of the spring (18) is fixedly connected to one side of the limiting block (17).

7. The screw extruder for rubber hose production according to claim 1, characterized in that: Limiting strips (21) are fixedly connected to both the left and right sides of the mounting box (19). Multiple plastic balls (22) that are adapted to and snapped onto the inner wall of the mounting box (19) are movably connected to the outer side of the limiting strips (21). A capping block (23) is fixedly connected to the top of the limiting strips (21).

8. The screw extruder for producing rubber hoses according to claim 1, characterized in that: The outer side of the mounting box (19) is fixedly connected to a buffer pad one (24), and the inner side of the mounting plate (12) is fixedly connected to a buffer pad two (25).

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