Banbury tangential rotor
By designing a tangential rotor for the internal mixer and using a prism structure with a specific helix angle and length ratio, the dispersibility and distribution performance problems of traditional rotors during final rubber mixing were solved, thereby improving mixing efficiency and final rubber quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YIYANG RUBBER PLASTICS MACHINERY GROUP
- Filing Date
- 2025-06-23
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional tangential rotors have a small sulfur content during final rubber mixing, which leads to high requirements for filler dispersion and distribution performance. In addition, the rubber compound is in sheet form, resulting in low production efficiency and reduced final rubber quality.
A tangential rotor for an internal mixer is designed, employing a structure with two long edges and two short edges. The short edges have a helix angle of 49 degrees, while the long edges have segmented helix angles of 49 degrees and 30 degrees. The rubber-facing surface is naturally tangent to the rotor body, and the rubber-backing surface intersects the rotor body at 39 degrees. The axial length ratio of the long edges to the short edges is 2.7 times, and the length ratio of the first segment to the second segment is 2:1, ensuring balanced material processing and mixing quality during rotor rotation.
It significantly improves material mixing efficiency and dispersion uniformity, reduces eddies and dead zones, enhances mixing quality, and ensures production efficiency and final rubber quality.
Smart Images
Figure CN224446447U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of internal mixer technology, and specifically to a tangential rotor for an internal mixer. Background Technology
[0002] Internal mixers are widely used in the rubber products industry. Their main function is to mix materials, rapidly combining fillers and rubber into a cohesive whole. This requires the fillers to have good dispersibility and uniformity when mixed into the rubber. The rotor is the most crucial component of the internal mixer. During operation, the two rotors rotate in opposite directions, and their overall structure determines the dispersion and distribution performance of the fillers.
[0003] Traditional tangential rotors, especially when used for final rubber mixing, require high rotor distribution performance due to the relatively small sulfur content. Additionally, because the rubber compound is in flake form, traditional tangential rotors have a slower rubber-feeding speed. These factors result in a lower filling coefficient in the internal mixer during final rubber mixing with traditional tangential rotors, thus reducing both production efficiency and the quality of the final rubber compound. Utility Model Content
[0004] The purpose of this invention is to provide a tangential rotor for an internal mixer to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a tangential rotor for an internal mixer, comprising:
[0006] The rotor body has two long edges and two short edges, the two long edges being the left long edge and the right long edge, and the two short edges being the left short edge and the right short edge;
[0007] The short edge has a helix angle of 49 degrees, and the long edge includes a first segment and a second segment connected together. The helix angle of the first segment is 49 degrees, and the helix angle of the second segment is 30 degrees.
[0008] The cross-sectional edges of the long and short edges are provided with a rubber-facing surface, a rubber-backing surface, and a peak. The rubber-facing surface is naturally tangent to the circular edge of the rotor body's cross-section, and the rubber-backing surface intersects the circular edge of the rotor body's cross-section at an angle of 39°.
[0009] Furthermore, the left long edge and the left short edge are distributed on the left end of the rotor body, and the right short edge and the right long edge are distributed on the right end of the rotor body. The long edge extends to the end. This distribution method allows the material on the left and right sides to be processed evenly during the rotation of the rotor.
[0010] Furthermore, the left long edge and the right long edge are of the same length, the left short edge and the right short edge are of the same length, and the axial length of the long edge is 2.7 times the axial length of the short edge. This length ratio helps to maintain the balance and symmetry of the rotor.
[0011] Furthermore, the length of the first segment is twice that of the second segment. This segment length ratio design allows the long edge to produce different degrees of shearing and mixing effects on the material at different positions.
[0012] Furthermore, the distance from the edge corner of the ridge to the center of the rotor body cross-section is set to R1, the radius of the cross-section circle of the rubber-facing surface is set to R2, and the radius of the cross-section circle of the rotor body is set to R3. R1 is 1.5 times R3, and R2 is 1.04 times R1. This allows for precise control of the shape and size of the ridge. This precise dimensional relationship ensures that the position and shape of the ridge on the rotor body meet the optimal mixing and shearing requirements.
[0013] Furthermore, the width of the ridge peak is set to W, where W = πR1 / 36. The width of the ridge peak calculated according to this formula can match the distance R1 from the edge corner of the ridge peak to the center of the rotor body cross section, making the width dimension of the ridge peak on the rotor body more reasonable.
[0014] Furthermore, the first and second segments are integrally formed, which ensures the overall structural strength and stability of the long edge.
[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:
[0016] 1. The rotor body has two long edges and two short edges. The combination of the 49-degree helix angle of the short edges and the segmented helix angle of the long edges can form a complex shear field when the material enters the rotor working area. This design causes the flow direction and speed of the material on the rotor surface to change multiple times, thereby significantly improving the mixing efficiency and dispersion uniformity of the material. The adhesive-facing surface is naturally tangent to the edge of the rotor body cross-section circle, and the adhesive-backing surface intersects the edge of the cross-section circle at a 39-degree position, which further optimizes the flow path of the material, reduces eddies and dead corners, and ensures that the residence time of the material on the rotor surface is more reasonable, thereby further improving the mixing quality.
[0017] 2. The ratio of the axial length of the long edge to the short edge is 2.7 times, and the ratio of the length of the first segment to the length of the second segment is 2:1. This ratio ensures that the rotor can fully exert the stirring and shearing effect of the long edge while providing enough space for the short edge to assist in mixing. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0019] Figure 1 This is a schematic diagram of the unfolded apex of this utility model;
[0020] Figure 2 This is a schematic diagram of the present invention along the rotor rotation direction;
[0021] Figure 3 This is a schematic diagram of the cross-section of the single convex ridge of this utility model;
[0022] Figure 4 This is a schematic diagram of the structure of this utility model.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Rotor body; 2. Long left edge; 3. Short left edge; 4. Short right edge; 5. Long right edge; 6. First section length; 7. Second section length; 8. Adhesive-facing surface; 9. Adhesive-backing surface; 10. Edge peak. Detailed Implementation
[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0026] This utility model provides, for example Figures 1 to 4 The illustrated tangential rotor for an internal mixer includes:
[0027] The rotor body 1 has two long edges and two short edges. The two long edges are the left long edge 2 and the right long edge 5, and the two short edges are the left short edge 3 and the right short edge 4.
[0028] The short edge has a helix angle of 49 degrees, and the long edge consists of a first segment of length 6 and a second segment of length 7 connected together. The helix angle of the first segment of length 6 is 49 degrees, and the helix angle of the second segment of length 7 is 30 degrees.
[0029] The cross-sectional edges of the long and short edges are provided with a rubber-facing surface 8, a rubber-backing surface 9, and a ridge peak 10. The rubber-facing surface 8 is naturally tangent to the circular edge of the cross-section of the rotor body 1, and the rubber-backing surface 9 intersects the circular edge of the cross-section of the rotor body 1 at an angle of 39°.
[0030] The left long edge 2 and the left short edge 3 are distributed on the left end of the rotor body 1, and the right short edge 4 and the right long edge 5 are distributed on the right end of the rotor body 1. The long edges extend to the end. This distribution method allows the material on the left and right sides to be processed evenly during the rotation of the rotor.
[0031] The left long edge 2 and the right long edge 5 have the same length, and the left short edge 3 and the right short edge 4 have the same length. The axial length of the long edge is 2.7 times the axial length of the short edge. This length ratio helps to maintain the balance and symmetry of the rotor.
[0032] The length of the first segment (6) is twice that of the second segment (7). This segment length ratio design allows the long edge to produce different degrees of shearing and mixing effects on the material at different positions.
[0033] The distance from the edge corner of the ridge 10 to the center of the rotor body 1 cross section is set to R1, the radius of the cross section circle of the rubber-facing surface 8 is set to R2, and the radius of the cross section circle of the rotor body 1 is set to R3. R1 is 1.5 times R3, and R2 is 1.04 times R1. This allows for precise control of the shape and size of the ridge. This precise dimensional relationship ensures that the position and shape of the ridge on the rotor body 1 meet the optimal mixing and shearing requirements.
[0034] The width of the ridge peak 10 is set to W, where W = πR1 / 36. The width of the ridge peak 10 calculated according to this formula can match the distance R1 from the edge corner of the ridge peak 10 to the center of the rotor body 1 cross section, making the width dimension of the ridge peak 10 on the rotor body 1 more reasonable.
[0035] The first segment, 6 cm long, and the second segment, 7 cm long, are integrally formed, which ensures the overall structural strength and stability of the long edge.
[0036] In this invention, the rotors need to be installed in pairs during the internal mixer installation. Rotating this tangential rotor 180 degrees transforms it into another rotor. The rotor body 1 of this tangential rotor has two long edges and two short edges. Combined with the 49-degree helix angle of the short edges and the segmented helix angle of the long edges, a complex shear field can be formed when the material enters the rotor working area. This design causes the flow direction and speed of the material on the rotor surface to change multiple times, thereby significantly improving the mixing efficiency and dispersion uniformity of the material. The rubber-facing surface 8 is naturally tangent to the circular edge of the rotor body 1, and the rubber-backing surface 9 intersects the circular edge of the rotor body 1 at a 39-degree position, further optimizing the material flow path, reducing eddies and dead angles, ensuring a more reasonable residence time of the material on the rotor surface, and further improving the mixing quality. The axial length ratio of the long edges to the short edges is 2.7 times, and the length ratio of the first segment length 6 to the second segment length 7 is 2:1. This proportional relationship ensures that the rotor can fully exert the stirring and shearing effect of the long edges while providing sufficient space for the short edges to assist in mixing.
[0037] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. An internal mixer tangential type rotor, characterized by, include: The rotor body (1) has two long edges and two short edges. The two long edges are the left long edge (2) and the right long edge (5), and the two short edges are the left short edge (3) and the right short edge (4). The short edge has a helix angle of 49 degrees, and the long edge includes a first segment (6) and a second segment (7) connected together. The helix angle of the first segment (6) is 49 degrees, and the helix angle of the second segment (7) is 30 degrees. The long and short edges are provided with a rubber-facing surface (8), a rubber-backing surface (9), and a peak (10). The rubber-facing surface (8) is naturally tangent to the edge of the cross-section circle of the rotor body (1), and the rubber-backing surface (9) intersects the edge of the cross-section circle of the rotor body (1) at an angle of 39°.
2. A tangential rotor for an internal mixer according to claim 1, characterized in that: The left long edge (2) and left short edge (3) are distributed on the left end of the rotor body (1), and the right short edge (4) and right long edge (5) are distributed on the right end of the rotor body (1), with the long edge extending to the end.
3. A tangential rotor for an internal mixer according to claim 1, characterized in that: The left long edge (2) and the right long edge (5) have the same length, the left short edge (3) and the right short edge (4) have the same length, and the axial length of the long edge is 2.7 times the axial length of the short edge.
4. A tangential rotor for an internal mixer according to claim 1, characterized in that: The length of the first segment (6) is twice the length of the second segment (7).
5. An internal mixer tangential rotor according to claim 1, characterized in that: The distance from the edge corner of the ridge (10) to the center of the cross section of the rotor body (1) is set as R1, the radius of the cross section of the rubber-facing surface (8) is set as R2, and the radius of the cross section of the rotor body (1) is set as R3. R1 is 1.5 times R3, and R2 is 1.04 times R1.
6. A Banbury® mixer tangential rotor according to claim 5, characterized in that: The width of the ridge (10) is set to W, where W = πR1 / 36.
7. An internal mixer tangential rotor according to claim 1, characterized in that: The first segment (6) and the second segment (7) are integrally processed and formed.