Conical reducing anti-breaking double screw extruder
By designing a tapered, variable-diameter, detachable extrusion screw, the problems of multi-device matching and screw breakage were solved, achieving versatility and durability of the equipment and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUANZHOU SUPERCURUI NEW MATERIAL CO LTD
- Filing Date
- 2025-09-09
- Publication Date
- 2026-08-04
AI Technical Summary
Existing twin-screw extruders require multiple devices to match when processing different materials, which increases costs and makes the extrusion screws prone to breakage.
A tapered variable diameter extrusion screw was designed, with a large round end and a small round end at both ends. The screw is connected to the shaft through a cross groove. The screw has a detachable structure, is suitable for extruding materials of different viscosity, and adopts a solid structure to prevent breakage.
It enables the same equipment to adapt to the extrusion requirements of different viscous materials, reduces equipment costs, and improves the durability of the screw through detachable design and solid structure.
Smart Images
Figure CN224588579U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a conical variable diameter anti-breakage twin-screw extruder, belonging to the field of [specific technology / industry]. Background Technology
[0002] Twin-screw extruders were developed based on single-screw extruders. Due to their excellent feeding performance, mixing and plasticizing performance, venting performance, and extrusion stability, they have been widely used in the molding and processing of extruded products.
[0003] When using a twin-screw extruder, due to the different viscosities of different materials and the different extrusion scenarios, multiple extrusion devices are usually required for matching, which leads to a significant increase in cost. Therefore, in order to address the above situation, a conical variable diameter anti-breakage twin-screw extruder is proposed. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a conical variable diameter anti-breakage twin-screw extruder to solve the existing problems.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a conical variable-diameter anti-fracture twin-screw extruder, comprising an extrusion chamber, a base, and a motor base. The extrusion chamber is located on the base, and the motor base is connected to the base and located on one side of the extrusion chamber. A motor is mounted on the motor base, and a main gear is connected to the output shaft of the motor. A secondary gear meshes with the main gear. The extrusion chamber also has a feed port and a discharge port. Both the main gear and the secondary gear have rotating shafts that extend into the extrusion chamber and are connected to an extrusion screw. The extrusion screw and the rotating shaft are detachably connected. The top of the extrusion chamber is hinged to facilitate the replacement of the extrusion screw.
[0006] Furthermore, the extrusion screw has a conical structure, and the two ends of the extrusion screw are a large round end and a small round end, respectively.
[0007] Furthermore, a cross groove is provided on the rotating shaft, and the extrusion screw is connected to the rotating shaft through the cross groove.
[0008] Furthermore, the large round end is provided with a cavity structure, the diameter of which is equal to the diameter of the rotating shaft, and a first cross protrusion is provided inside the cavity structure, which matches the cross groove.
[0009] Furthermore, a second cross-shaped protrusion is provided on the small round end, and the second cross-shaped protrusion also matches the cross groove.
[0010] Furthermore, the extrusion screw has a solid structure.
[0011] The beneficial effects of this utility model are:
[0012] 1. The extrusion screw is conical, which allows it to operate in two modes, thus adapting to different viscosities and extrusion scenarios.
[0013] 2. The extrusion screw is detachable, which allows for switching of working modes;
[0014] 3. The extrusion screw has a solid structure, which effectively prevents breakage. Attached Figure Description
[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0016] Figure 1 This is a schematic diagram of the overall structure of a conical variable diameter anti-fracture twin-screw extruder according to the present invention;
[0017] Figure 2 This is a schematic diagram of the extrusion chamber structure of a conical variable diameter anti-fracture twin-screw extruder according to the present invention;
[0018] Figure 3 This is a schematic diagram of the working structure of the extrusion chamber of a conical variable diameter anti-fracture twin-screw extruder according to the present invention;
[0019] Figure 4 This is a schematic diagram of the shaft structure of a conical variable diameter anti-breakage twin-screw extruder according to the present invention;
[0020] Figure 5 This is a schematic diagram of the large round end structure of a conical variable diameter anti-fracture twin-screw extruder according to the present invention;
[0021] Figure 6 This is a schematic diagram of the small round end structure of a conical variable diameter anti-breakage twin-screw extruder according to the present invention.
[0022] In the diagram: 1. Extrusion chamber; 2. Base; 3. Motor base; 4. Motor; 5. Main gear; 6. Secondary gear; 7. Feed port; 8. Discharge port; 9. Rotating shaft; 10. Extrusion screw; 11. Large round end; 12. Small round end; 13. Cross groove; 14. Cavity structure; 15. First cross protrusion; 16. Second cross protrusion. Detailed Implementation
[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0024] Please see Figures 1-6This utility model provides a technical solution for a conical variable diameter anti-breakage twin-screw extruder: its structure includes an extrusion chamber 1, a base 2, and a motor base 3. The extrusion chamber 1 is located on the base 2, and the motor base 3 is connected to the base 2 and located on one side of the extrusion chamber 1. A motor 4 is provided on the motor base 3, and a main gear 5 is connected to the output shaft of the motor 4. A secondary gear 6 meshes with the main gear 5. The extrusion chamber 1 is also provided with a feed port 7 and a discharge port 8. Both the main gear 5 and the secondary gear 6 are provided with a rotating shaft 9. The rotating shaft 9 extends into the extrusion chamber 1 and is connected to an extrusion screw 10. The extrusion screw 10 and the rotating shaft 9 are detachably connected.
[0025] The extrusion screw 10 has a conical structure, and its two ends are a large round end 11 and a small round end 12, respectively. The rotating shaft 9 has a cross groove 13. The extrusion screw 10 is connected to the rotating shaft 9 through the cross groove 13. The large round end 11 has a cavity structure 14, the diameter of which is equal to the diameter of the rotating shaft 9. The cavity structure 14 has a first cross protrusion 15, which matches the cross groove 13. The small round end 12 has a second cross protrusion 16, which also matches the cross groove 13.
[0026] The extrusion screw 10 is a solid structure.
[0027] For example, before use, first determine the viscosity of the extruded material. When the material viscosity is high, the large round end 11 is the feed end and the small round end 12 is the discharge end. Feeding at the large round end 11 can reduce the initial flow resistance of the material, and discharging at the small round end 12 can gradually increase the pressure by compression, ensuring that the high viscosity material is extruded smoothly and maintains a stable shape. Moreover, the material is gradually compressed during the flow process, and the pressure gradually increases. Therefore, it is also suitable for processes that require high-pressure molding.
[0028] When the material viscosity is low, the small round end 12 is the feed end and the large round end 11 is the discharge end. The small round end 12 can quickly build up pressure when feeding, and the large round end 11 reduces the flow rate by expanding the flow channel area when discharging. It is suitable for low viscosity materials or processes that require rapid cooling and shaping.
[0029] When the extrusion screw 10 is replaced, the cavity structure 14 of the large round end 11 is inserted into the rotating shaft 9, and at the same time the first cross protrusion 15 is inserted into the cross groove 13, while the small round end 12 is directly inserted into the cross groove 13 through the second cross protrusion 16.
[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A conical variable-diameter anti-fracture twin-screw extruder, comprising an extrusion chamber (1), a base (2), and a motor base (3), wherein the extrusion chamber (1) is located on the base (2), the motor base (3) is connected to the base (2) and located on one side of the extrusion chamber (1), a motor (4) is provided on the motor base (3), a main gear (5) is connected to the output shaft of the motor (4), a secondary gear (6) meshes with the main gear (5), and the extrusion chamber (1) is further provided with a discharge port (7) and a discharge port (8), characterized in that: Both the main gear (5) and the secondary gear (6) are provided with a rotating shaft (9), the rotating shaft (9) extends into the extrusion chamber (1) and the rotating shaft (9) is connected to an extrusion screw (10), and the extrusion screw (10) and the rotating shaft (9) are detachably connected.
2. The conical variable diameter anti-fracture twin-screw extruder according to claim 1, characterized in that: The extrusion screw (10) has a tapered structure and the two ends of the extrusion screw (10) are a large round end (11) and a small round end (12), respectively.
3. A conical variable-diameter anti-fracture twin-screw extruder according to claim 2, characterized in that: The rotating shaft (9) is provided with a cross groove (13), and the extrusion screw (10) is connected to the rotating shaft (9) through the cross groove (13).
4. A conical variable diameter anti-fracture twin-screw extruder according to claim 3, characterized in that: The large round end (11) is provided with a cavity structure (14), the diameter of the cavity structure (14) is equal to the diameter of the rotating shaft (9), and a first cross protrusion (15) is provided inside the cavity structure (14), the first cross protrusion (15) matching the cross groove (13).
5. A conical variable diameter anti-fracture twin-screw extruder according to claim 4, characterized in that: The small round end (12) is provided with a second cross protrusion (16), which also matches the cross groove (13).
6. A conical variable-diameter anti-fracture twin-screw extruder according to claim 1, characterized in that: The extrusion screw (10) is a solid structure.