Twin-screw extruder for granulating asphalt modifier
By introducing an automatic cleaning system with cleaning brushes and scrapers into a twin-screw extruder, the problem of material adhesion was solved, achieving uniform material conveying and efficient plasticization, thus improving the quality and production efficiency of asphalt modifiers.
Patent Information
- Application Number
- CN202520502070.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-21
AI Technical Summary
In existing twin-screw extruders, during the asphalt modifier feeding process, the material tends to adhere to the inner wall of the screw feeder, resulting in uneven conveying and affecting the quality of subsequent batches.
A screw feeder with a cleaning brush and scraper was designed. The cleaning brush and scraper are automatically cleaned by a motor-driven rotating rod. Combined with a cooling fan and heat dissipation fins, the material uniformity and heat dissipation efficiency of the equipment are improved.
It achieves automated cleaning, reduces labor intensity, ensures uniform material delivery and efficient plasticization, and improves the quality and production efficiency of asphalt modifiers.
Smart Images
Figure CN223890432U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of twin-screw extruder technology, and in particular to a twin-screw extruder for granulation processing of asphalt modifiers. Background Technology
[0002] A twin-screw extruder is a common plastic processing equipment, consisting of two intermeshing or parallel screws and a barrel. The rotation of the screws propels the material forward, achieving operations such as material conveying, melting, mixing, and plasticizing. It is widely used in plastic granulation, pipe and profile production, composite material preparation, and other fields, and can efficiently process polymer raw materials into the required products or semi-finished products.
[0003] The twin-screw extruder for asphalt modifier granulation is a specialized device for granulating asphalt modifiers. It consists of two screws, a barrel, a transmission device, and a heating and cooling system. Through the rotation of the two screws, shearing and extrusion forces are generated in the meshing zone, causing the asphalt modifier material to melt, mix, and homogenize during the conveying process. Then, it is extruded into strips through a die, and subsequently granulated into granules by a granulation device. It features efficient mixing, precise control of material temperature and conveying volume, and can ensure the quality and production efficiency of asphalt modifier granulation.
[0004] In existing technologies, some twin-screw extruders suffer from problems due to the stickiness of asphalt modifiers. During the feeding process, these modifiers tend to adhere to the inner wall of the screw feeder. Over time, this adhered material gradually accumulates, affecting the feeding efficiency of the screw feeder and resulting in uneven material conveying. Furthermore, the residue can affect the quality of subsequent batches of asphalt modifiers. Therefore, a twin-screw extruder for asphalt modifier granulation is proposed to solve these problems. Summary of the Invention
[0005] To overcome the above shortcomings, this utility model provides a twin-screw extruder for asphalt modifier granulation processing, aiming to improve the problem of uneven material conveying in the prior art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A twin-screw extruder for granulation processing of asphalt modifiers includes a barrel. A screw feeder is fixedly connected to the top of the barrel, and a motor is fixedly connected to the top of the screw feeder. A rotating rod is fixedly connected to the drive end of the motor. Multiple connecting plates are fixedly connected to the outside of the rotating rod. A connecting plate is fixedly connected to the right side of one of the connecting plates, and a connecting frame is fixedly connected to the front side of the connecting plate. Two buffer grooves are formed inside the connecting frame. A spring is fixedly connected to the left inner wall of the buffer groove. A slider is fixedly connected to the right side of the two springs. A cleaning brush is rotatably connected to the adjacent side of the two sliders. A second buffer groove is formed inside the connecting plate. Multiple second springs are fixedly connected to the front inner wall of the second buffer groove. A scraper is fixedly connected to the rear side of the multiple second springs. A portable component for heat dissipation of the barrel is formed inside the barrel.
[0008] As a further description of the above technical solution:
[0009] The portable component includes an exhaust port, a filter screen is fixedly connected to the bottom of the inner wall of the exhaust port, a cooling fan is fixedly connected to the top of the inner wall of the exhaust port, and a cooling fin is provided on the top of the barrel.
[0010] As a further description of the above technical solution:
[0011] The slider is externally slidably connected to the inside of the buffer trough, and the outside of the cleaning brush is in contact with the inner wall of the screw feeder;
[0012] As a further description of the above technical solution:
[0013] The scraper is externally slidably connected to the inside of the second buffer trough, and the rear side of the scraper is in contact with the inner wall of the screw feeder;
[0014] As a further description of the above technical solution:
[0015] The inside of the barrel is rotatably connected to a threaded rod, and the bottom of the barrel is fixedly connected to a support platform;
[0016] As a further description of the above technical solution:
[0017] A control console is fixedly connected to the top of the support platform, and a second motor is fixedly connected to the top of the support platform.
[0018] As a further description of the above technical solution:
[0019] The left side of the threaded rod is fixedly connected to the drive end of the second motor, and multiple stirring blocks are fixedly connected to the outside of the rotating rod;
[0020] As a further description of the above technical solution:
[0021] The bottom of the heat dissipation fins is in contact with the outside of the casing, and the exterior of the exhaust port is opened inside the casing.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, a motor drives a rotating rod to rotate, which in turn rotates the rotating rod and the connecting plate. The cleaning brush, under the action of a slider and a spring, adheres tightly to the inner wall of the screw feeder, cleaning the inner wall. The scraper, under the action of a spring and a buffer groove, scrapes off solidified materials or impurities from the inner wall of the screw feeder. This achieves automated cleaning via motor drive, eliminating the need for manual operation and significantly reducing labor intensity. The spring buffer effectively removes material residue and impurities from the inner wall of the screw feeder while protecting the cleaning components from damage.
[0024] 2. In this utility model, gas is discharged through the exhaust hole, the filter screen prevents the material from escaping, and then the cooling fan dissipates heat from the material and the threaded rod. At the same time, the cooling fins on the top of the barrel can accelerate the heat dissipation speed on the surface of the barrel, thereby ensuring the uniform plasticization and homogenization of the asphalt modifier material and constructing an efficient heat dissipation system that can quickly remove the large amount of heat generated during the material processing and effectively avoid heat accumulation. Attached Figure Description
[0025] Figure 1 This is a three-dimensional schematic diagram of a twin-screw extruder for granulation processing of asphalt modifiers proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of the rotating rod of a twin-screw extruder for granulation processing of asphalt modifiers proposed in this utility model;
[0027] Figure 3 This is a schematic diagram of the connecting plate of a twin-screw extruder for granulation processing of asphalt modifiers proposed in this utility model.
[0028] Figure 4 This is a schematic diagram of the vent hole structure of a twin-screw extruder for granulation processing of asphalt modifiers proposed in this utility model.
[0029] Figure 5 for Figure 3 Enlarged view of point A in the middle;
[0030] Figure 6 for Figure 4 Enlarged view of section B in the middle.
[0031] Legend:
[0032] 1. Barrel; 2. Screw feeder; 3. Motor 1; 4. Rotating rod; 5. Connecting plate; 6. Connecting plate; 7. Connecting frame; 8. Buffer 1; 9. Spring 1; 10. Sliding block; 11. Cleaning brush; 12. Buffer 2; 13. Spring 2; 14. Scraper; 15. Exhaust port; 16. Filter screen; 17. Cooling fan; 18. Cooling fins; 19. Threaded rod; 20. Control console; 21. Motor 2; 22. Support platform; 23. Mixing block. Detailed Implementation
[0033] 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.
[0034] Reference Figures 1 to 3 This utility model provides an embodiment of a twin-screw extruder for granulation processing of asphalt modifiers, comprising a barrel 1, which provides installation space and protection for the internal threaded rod 19. A screw feeder 2 is fixedly connected to the top of the barrel 1, which is used to feed material into the barrel 1. A motor 3 is fixedly connected to the top of the screw feeder 2, which is the power source for the mixing assembly. A rotating rod 4 is fixedly connected to the drive end of the motor 3, and the rotating rod 4 rotates under the force of the motor 3. Multiple connecting plates 5 are fixedly connected to the outside of the rotating rod 4, thereby causing the rotating rod 4 to drive the connecting plates 5 to rotate. A connecting plate 6 is fixedly connected to the right side of one of the connecting plates 5, which provides fixation and support for the connecting frame 7. The connecting frame 7 is fixedly connected to the front side of the connecting plate 6, and the connecting frame 7 provides space for the opening of the buffer groove 8.
[0035] Reference Figure 3 and Figure 5 The connecting frame 7 has two buffer grooves 8 inside. The buffer grooves 8 provide fixation and support for the springs 9, and also provide limiting and guiding functions for the slider 10. The springs 9 are fixedly connected to the left inner wall of the buffer grooves 8. The springs 9 have elasticity and provide elastic support for the slider 10. After the slider 10 and cleaning brush 11 are subjected to force, they can push the slider 10 and cleaning brush 11 to reset through their own elasticity. The sliders 10 are fixedly connected to the right side of the two springs 9. The sliders 10 provide limiting and guiding functions for the cleaning brush 11. The cleaning brush 11 is rotatably connected to the adjacent side of the two sliders 10. The cleaning brush 11 is used to clean the inner wall of the screw feeder 2.
[0036] The connecting plate 6 has a second buffer groove 12 inside, which provides fixation and support for the scraper 14, and also provides limiting and guiding functions for the scraper 14. Multiple springs 13 are fixedly connected to the inner wall of the front side of the second buffer groove 12. The springs 13 have elasticity and provide elastic support for the scraper 14. After the scraper 14 is subjected to force, it can push the scraper 14 to return to its original position through its own elasticity. The scraper 14 is fixedly connected to the rear side of the multiple springs 13. The scraper 14 scrapes off solidified materials or impurities. The inside of the barrel 1 has a portable component to facilitate heat dissipation of the barrel 1.
[0037] Reference Figure 4 and Figure 6 The portable component includes an exhaust port 15, which is used to discharge gases that were not completely discharged during the plasticization process and gases newly released due to shearing during the melt mixing process after the material has been plasticized and has entered the melt homogenization stage. The exhaust port 15 is used to discharge gases that were not completely discharged during the plasticization process and gases newly released due to shearing during the melt mixing process. A filter screen 16 is fixedly connected to the bottom of the inner wall of the exhaust port 15 to prevent the material from escaping. A cooling fan 17 is fixedly connected to the top of the inner wall of the exhaust port 15 to dissipate heat from the material and the threaded rod 19 at the same time as discharging the discharged gas. A heat dissipation fin 18 is provided on the top of the barrel 1 to accelerate the heat dissipation speed of the barrel 1.
[0038] Reference Figures 2 to 4 The external sliding connection of slider 10 is to the inside of buffer trough 1 8. Buffer trough 1 8 provides limiting and guiding function for slider 10. The external contact of cleaning brush 11 is in contact with the inner wall of screw feeder 2. Cleaning brush 11 is used to clean the inner wall of screw feeder 2. The external sliding connection of scraper 14 is to the inside of buffer trough 2 12. Buffer trough 2 12 provides limiting and guiding function for scraper 14. The rear side of scraper 14 is in contact with the inner wall of screw feeder 2. Scraper 14 is used to hang solidified material or impurities on the inner wall surface of screw feeder 2. The inside of barrel 1 is rotatably connected to threaded rod 19. Threaded rod 19 receives force from motor 21. Through meshing, it drives another threaded rod 19 to rotate together. The rotation of threaded rod 19 pushes the asphalt modifier material forward. A shearing, mixing and extrusion zone is formed in the meshing zone, so that the material is fully mixed and plasticized.
[0039] A support platform 22 is fixedly connected to the bottom of the barrel 1. The support platform 22 provides fixation and support for the upper device. A control console 20 is fixedly connected to the top of the support platform 22. The control console 20 allows the operator to control the device and view the working parameters. A motor 21 is fixedly connected to the top of the support platform 22. The support platform 22 provides fixation and support for the motor 21. The left side of the threaded rod 19 is fixedly connected to the drive end of the motor 21. The threaded rod 19 receives force from the motor 21 to rotate. Multiple stirring blocks 23 are fixedly connected to the outside of the rotating rod 4. The stirring blocks 23 are used to stir the materials to ensure thorough mixing. The bottom of the heat dissipation fins 18 is in contact with the outside of the barrel 1. The heat dissipation fins 18 can accelerate the heat dissipation speed of the outside of the barrel 1, ensuring that heat can be discharged in time and avoiding heat accumulation around the equipment. The exhaust port 15 is opened on the outside of the barrel 1 inside the barrel 1. The barrel 1 provides space for the exhaust port 15.
[0040] Working principle: When cleaning the inner wall of the screw feeder 2 is required during use, the motor 3 drives the rotating rod 4 to rotate, which in turn drives the connecting plate 5 to rotate. The connecting plate 5 then drives the connecting plate 6 to move synchronously. The cleaning brush 11 in the connecting frame 7 is pressed against the inner wall of the screw feeder 2 by the slider 10 and the spring 9, which provides elastic cushioning to prevent damage to the cleaning brush 11. As the connecting plate 6 rotates, the cleaning brush 11 cleans the inner wall of the screw feeder 2. The scraper 14, under the action of the spring 13 and the buffer groove 12, scrapes off the solidified material or impurities on the inner wall of the screw feeder 2, thus achieving effective cleaning of the inner wall of the screw feeder.
[0041] When the device starts working, the material enters the barrel 1 through the screw feeder 2. The motor 21 drives the screw rod 19 to rotate, pushing the asphalt modifier material forward and mixing and plasticizing it. During the plasticizing and melt homogenization stages, the gas is discharged through the exhaust port 15, and the filter screen 16 prevents the material from escaping. Then, the cooling fan 17 dissipates heat from the material and the screw rod 19. At the same time, the heat dissipation fins 18 on the top of the barrel 1 can accelerate the heat dissipation speed on the surface of the barrel 1, and finally realize the granulation processing of the asphalt modifier.
[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 twin-screw extruder for granulation processing of asphalt modifiers, comprising a barrel (1), characterized in that: A screw feeder (2) is fixedly connected to the top of the barrel (1), and a motor (3) is fixedly connected to the top of the screw feeder (2). A rotating rod (4) is fixedly connected to the drive end of the motor (3). Multiple connecting plates (5) are fixedly connected to the outside of the rotating rod (4). A connecting plate (6) is fixedly connected to the right side of one of the connecting plates (5). A connecting frame (7) is fixedly connected to the front side of the connecting plate (6). Two buffer grooves (8) are opened inside the connecting frame (7). A spring (9) is fixedly connected to the left inner wall of the connecting plate (6), and a slider (10) is fixedly connected to the right side of the two springs (9). A cleaning brush (11) is rotatably connected to the adjacent side of the two sliders (10). A buffer groove (12) is provided inside the connecting plate (6). A plurality of springs (13) are fixedly connected to the front inner wall of the buffer groove (12). A scraper (14) is fixedly connected to the rear side of the plurality of springs (13). A portable component for heat dissipation of the barrel (1) is provided inside the barrel (1).
2. The twin-screw extruder for granulation processing of asphalt modifiers according to claim 1, characterized in that: The portable component includes an exhaust port (15), a filter screen (16) is fixedly connected to the bottom of the inner wall of the exhaust port (15), a cooling fan (17) is fixedly connected to the top of the inner wall of the exhaust port (15), and a cooling fin (18) is provided on the top of the barrel (1).
3. The twin-screw extruder for granulation processing of asphalt modifiers according to claim 1, characterized in that: The slider (10) is externally slidably connected to the inside of the buffer trough (8), and the outside of the cleaning brush (11) is in contact with the inner wall of the screw feeder (2).
4. The twin-screw extruder for granulation processing of asphalt modifiers according to claim 1, characterized in that: The scraper (14) is externally slidably connected to the inside of the second trough (12), and the rear side of the scraper (14) is in contact with the inner wall of the screw feeder (2).
5. The twin-screw extruder for granulation processing of asphalt modifiers according to claim 1, characterized in that: The inside of the barrel (1) is rotatably connected to a threaded rod (19), and the bottom of the barrel (1) is fixedly connected to a support platform (22).
6. The twin-screw extruder for asphalt modifier granulation processing according to claim 5, characterized in that: The top of the support platform (22) is fixedly connected to the control console (20), and the top of the support platform (22) is fixedly connected to the motor (21).
7. A twin-screw extruder for granulation processing of asphalt modifiers according to claim 6, characterized in that: The left side of the threaded rod (19) is fixedly connected to the drive end of the second motor (21), and multiple stirring blocks (23) are fixedly connected to the outside of the rotating rod (4).
8. A twin-screw extruder for granulation processing of asphalt modifiers according to claim 2, characterized in that: The bottom of the heat dissipation fins (18) is in contact with the outside of the barrel (1), and the outside of the exhaust port (15) is opened inside the barrel (1).