Mixing machine
By combining the layered blade system and the guide rib assembly, the problem of material stratification caused by density differences in the mixer is solved, achieving efficient and uniform material mixing and ensuring product quality stability and consistency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO SHENGKANG PLASTIC IND CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-05-22
AI Technical Summary
When mixing materials with significant differences in density, existing mixers cause heavy fillers to settle and accumulate at the bottom, while light components float to the top, resulting in insufficient material mixing uniformity and affecting the stability and consistency of product quality.
The system employs a combined layered blade system, including upper crushing blades, middle mixing blades, and lower shearing blades. These blades, along with the guide ribs on the inner wall of the casing, form a three-dimensional vortex through asymmetrical arrangement and synergistic action, eliminating material stratification caused by density differences.
It achieves efficient mixing of complex components, ensuring product consistency and uniformity. Through the synergistic effects of crushing, convection, shearing, and guiding, it effectively prevents sedimentation and floating, and improves the mixing effect.
Smart Images
Figure CN224266087U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mixer technology, specifically a mixer. Background Technology
[0002] In the plastics manufacturing industry, especially in the production of modified engineering plastics and specialty masterbatches, efficient and uniform material mixing is a key step in ensuring the performance of the final product. As the core equipment for this process, the mixer's mixing effect directly impacts product quality and production efficiency.
[0003] In conventional mixers, when mixing materials containing multiple components with significantly different densities, the denser, heavier fillers will quickly settle and accumulate at the bottom of the mixing container due to gravity, while the lighter, less dense components will float to the surface of the mixture. This results in insufficient uniformity of material mixing, affecting the stability and consistency of product quality. To address this, we propose a new type of mixer. Utility Model Content
[0004] This invention addresses the shortcomings of existing technologies by proposing a mixer.
[0005] In order to solve the above-mentioned technical problems, the present invention solves the problem of material stratification in the prior art through the following technical solution.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A mixer includes a housing, a drive motor, and a stirring shaft; a combined layered blade system is disposed on the stirring shaft, including: an upper crushing blade, comprising multiple auxiliary shafts uniformly fixed to the outside of the stirring shaft, and fixed teeth uniformly arranged above and below the auxiliary shafts, the outer end of the fixed teeth having an arc-shaped cutting edge on the flow-facing side, the surface of the cutting edge having uniform serrations; a middle mixing blade, comprising a lower rotating plate and an upper rotating plate fixed to the stirring shaft on the inner side, the lower rotating plate being located below the auxiliary shafts and pressing the material downwards, the upper rotating plate being located below the lower rotating plate and pushing the material upwards; and a bottom shearing blade, comprising radially extending wing plates, the surface of which has guide holes and forms an acute angle with the horizontal plane; the three layers of blades are asymmetrically arranged along the axial direction and have independent functions.
[0008] Preferably, a baffle is provided between the middle layer mixing blades and the bottom layer shearing blades, and multiple baffles are evenly fixed on the outside of the stirring shaft, with hemispherical protrusions on their surfaces.
[0009] Preferably, the inner wall of the housing is provided with a flow-guiding rib group, which includes vertical ribs and spiral ribs; the flow-guiding rib group is divided into three layers: the upper layer is composed of circumferentially distributed downward spiral ribs; the middle layer is composed of circumferentially distributed vertical ribs; and the lower layer is composed of circumferentially distributed upward spiral ribs and vertical ribs interspersed.
[0010] Preferably, the height of the vertical ribs in the middle layer of the guide rib group is greater than the height of the upper spiral ribs or the lower spiral / vertical ribs.
[0011] Preferably, the cross-section of the vertical rib is trapezoidal.
[0012] Preferably, an upper conical spiral plate is fixedly connected to the bottom of the stirring shaft.
[0013] Preferably, there is a preset distance between the lower and upper rotating plates of the middle layer mixing blades.
[0014] Preferably, the air guide holes of the bottom shear blade are evenly distributed.
[0015] Preferably, the serrations of the cutting edge of the fixed tooth of the upper layer of broken blades have a continuous and uniform structure.
[0016] Preferably, the hemispherical protrusions on the surface of the spoiler are distributed in an array.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] This invention solves the material stratification problem caused by density differences in traditional mixers by using an asymmetrical arrangement and synergistic effect of a combined layered blade system. The serrated edges of the upper crushing blades cut off the upward floating path of light components; the lower rotating plate of the middle mixing blades compresses the heavy packing downwards and the upper rotating plate pushes the light materials upwards, forming a convection circulation; the acute-angled blades of the bottom shearing blades cut the settled agglomerates and, together with the guide holes, promote lateral diffusion.
[0019] The three-layer guide ribs on the inner wall of the casing guide the material to form a three-dimensional vortex, forcing the heavy / light components to repeatedly intersect in the vertical direction; the hemispherical protrusions of the turbulence plates between the middle layer mixing blades and the bottom layer shearing blades disperse the local laminar flow and eliminate mixing dead zones; the upper conical spiral plate at the bottom of the stirring shaft pushes the bottom material upward to replenish it, avoiding sedimentation and accumulation.
[0020] The serrated structure of the crushing blades efficiently crushes fibers / agglomerates, the double-spindle convection of the mixing blades eliminates density gradients, and the guide holes of the shearing blades balance shear force and flowability, adapting to the mixing of complex components and ensuring product consistency. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0023] Figure 2 This is a schematic diagram of the internal structure of the casing of this utility model;
[0024] Figure 3 This is a schematic diagram of the fixed tooth structure of this utility model;
[0025] Figure 4 This is a schematic diagram of the bottom shear blade structure of this utility model;
[0026] Figure 5 This is a schematic diagram of the flow guide rib assembly structure of this utility model;
[0027] Figure 6 This is a schematic diagram of the vertical rib structure of this utility model.
[0028] Drawing number explanation: 1. Casing; 2. Drive motor; 3. Stirring shaft; 4. Upper crushing blades; 5. Auxiliary shaft; 6. Fixing teeth; 7. Cutting edge; 8. Serrated edge; 9. Middle layer mixing blades; 10. Lower rotating plate; 11. Upper rotating plate; 12. Bottom layer shearing blades; 13. Wing plate; 14. Guide hole; 15. Baffle; 16. Protrusion; 17. Guide rib assembly; 18. Vertical rib; 19. Spiral rib; 20. Spiral plate. Detailed Implementation
[0029] The present invention will now be described in further detail with reference to the accompanying drawings. Example
[0030] Please see Figures 1-6 A mixer includes a housing 1, a drive motor 2, and a stirring shaft 3; a combined layered blade system is provided on the stirring shaft 3, including: an upper crushing blade 4, including multiple auxiliary shafts 5 uniformly fixed to the outside of the stirring shaft 3, and fixed teeth 6 uniformly arranged above and below the auxiliary shafts 5, the outer end of the fixed teeth 6 is provided with an arc-shaped cutting edge 7 located on the flow-facing side, and the surface of the cutting edge 7 is provided with uniform serrations 8; the mixer cuts up floating clumps of light components during high-speed rotation, forcing the material to disperse longitudinally;
[0031] The middle layer mixing blades 9 include a lower rotating plate 10 and an upper rotating plate 11 fixed to the inner side of the stirring shaft 3. The lower rotating plate 10 is located below the auxiliary shaft 5 and presses the material downward, while the upper rotating plate 11 is located below the lower rotating plate 10 and pushes the material upward. The lower rotating plate 10 presses the heavy filler downward and the upper rotating plate 11 pushes the light material upward, forming a vertical bidirectional convection and eliminating density stratification.
[0032] The bottom shear blade 12 includes radially extending airfoils 13. The surface of the airfoils 13 has guide holes 14 forming an acute angle with the horizontal plane. The acute-angle airfoils 13, in conjunction with the guide holes 14, generate a high-intensity shear flow, crushing sediment agglomerates and promoting lateral diffusion. The asymmetrical arrangement of the three layers of blades achieves a coordinated division of labor between crushing, convection, and shearing, fundamentally solving the material separation problem.
[0033] The following describes some embodiments of this application in detail with reference to the accompanying drawings:
[0034] Please see Figures 1-6 This invention solves the problem of material stratification caused by density differences in traditional mixers by using the asymmetrical arrangement and synergistic effect of a combined layered blade system.
[0035] Among them, a baffle plate 15 is provided between the middle layer mixing blade 9 and the bottom layer shear blade 12. Multiple baffle plates 15 are evenly fixed on the outside of the stirring shaft 3. The surface of the baffle plate is provided with hemispherical protrusions 16. Through the hemispherical protrusions 16 distributed on the surface array, the laminar boundary layer is disturbed, the orderly flow path of the material is disrupted, and the heavy / light components are forced to randomly collide and mix in the transition area, thus eliminating the dead zone between layers.
[0036] Furthermore, the inner wall of the casing 1 is provided with a flow-guiding rib group 17, including vertical ribs 18 and spiral ribs 19; the flow-guiding rib group 17 is divided into three layers: the upper layer is composed of circumferentially distributed downward spiral ribs 19; the middle layer is composed of circumferentially distributed vertical ribs 18; the lower layer is composed of circumferentially distributed upward spiral ribs 19 and vertical ribs 18 interspersed; the upper layer downward spiral ribs 19 guide the top material to spiral downwards and suppress the floating of light components; the middle layer vertical ribs 18 reflect the flow stream through the vertical wall surface and enhance the radial turbulence intensity; the lower layer upward spiral ribs 19 and vertical ribs 18 are interspersed, pushing the bottom material upwards while cutting the flow field direction to form a three-dimensional vortex in the entire domain;
[0037] In addition, the height of the vertical rib 18 in the middle layer of the guide rib group 17 is greater than the height of the upper spiral rib 19 or the lower spiral rib 19 / vertical rib 18, making it the dominant reflector of the flow field in the middle of the casing 1, extending the residence time of the material in the center of the mixing chamber, and ensuring that components with large density differences are in full contact.
[0038] Among them, the cross section of the vertical rib 18 is trapezoidal, which allows the material to converge along the inclined surface to the center of the cavity when it impacts the rib surface, avoiding accumulation in the corner. At the same time, the trapezoidal structure enhances the deformation resistance of the rib and maintains the long-term flow field stability.
[0039] At the same time, an upper conical spiral plate 20 is fixedly connected to the bottom of the stirring shaft 3, which continuously pushes the heavy filler that has settled to the bottom upwards to replenish the working area of the middle layer mixing blades 9, preventing the mixing blind zone caused by bottom accumulation.
[0040] It is worth noting that the lower rotating plate 10 and the upper rotating plate 11 of the middle layer mixing blade 9 have a preset distance, forming a bidirectional convection channel;
[0041] Meanwhile, the guide holes 14 of the blades 13 of the bottom shear blades 12 are evenly distributed, which induces transverse jets during high-speed shearing, causing the cut agglomerates to splash in all directions and mix with the surrounding materials for a second time, balancing the shearing force and diffusion efficiency.
[0042] In addition, the serrations 8 of the fixed teeth 6 and the cutting edge 7 of the upper crushing blade 4 are continuous and uniform, forming high-frequency micro-cutting points, which can gradually crush fiber bundles or soft agglomerates and avoid large pieces of residue.
[0043] Meanwhile, the hemispherical protrusions 16 on the surface of the turbulence vane 15 are distributed in an array, generating a regular vortex street effect in the flow field, so that the local turbulent energy is uniformly transferred to the entire transition region, thereby improving the mixing uniformity.
[0044] The operating procedure of this device is as follows:
[0045] First, the drive motor 2 drives the stirring shaft 3 to rotate, the material is put into the casing 1, the auxiliary shaft 5 of the upper crushing blade 4 rotates at high speed, driving the fixed tooth 6 arc-shaped blade 7 to cut the material, the blade 7 saw tooth 8 tears and breaks the light fiber clumps, blocking the upward floating path, the guide rib group 17 upper layer downward spiral rib 19 compresses the material downward, forcing it into the middle layer mixed flow zone.
[0046] The lower rotating plate 10 presses down on the heavy packing material to counteract the settling inertia, while the upper rotating plate 11 pushes the light material upward, forming a bidirectional vertical flow. The preset distance between the lower rotating plate 10 and the upper rotating plate 11 adjusts the convection intensity and avoids blockage of the flow channel. The vertical ribs 18 in the middle layer of the guide rib group 17 reflect the flow stream and enhance radial turbulence. The trapezoidal cross section causes the material to converge towards the center of the cavity and prevents dead corners of accumulation.
[0047] When the material flows through the bottom of the intermediate mixing blade 9, the hemispherical protrusions 16 of the baffle 15 disperse the laminar flow; the array distribution of the protrusions 16 generates periodic vortex streets, promoting the interleaved penetration of heavy / light components;
[0048] The bottom shear blades 12 and the acute-angle wing plates 13 cut the sedimentation agglomerates, the guide holes 14 spray transverse jets to diffuse and crush the particles, and the upper conical spiral plate 20 pushes the bottom material obliquely upward to the middle layer area; the guide rib group 17 and the lower spiral rib 19 assist in lifting the flow and eliminating the sedimentation layer.
[0049] The lower vertical ribs 18 and spiral ribs 19 of the guide rib group 17 are staggered and cut the direction of the flow field; the middle high vertical ribs 18 extend the material residence time and ensure full diffusion; the bottom material is lifted and collides with the middle downward flow to form a closed-loop vortex; the sawtooth 8 continuous structure continuously crushes the newly formed agglomerates; thus achieving full-domain turbulent mixing.
[0050] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.
Claims
1. A mixer, comprising a housing (1), a drive motor (2), and a stirring shaft (3); Its features are, Also includes: A combined layered blade system, mounted on the stirring shaft (3), includes: The upper crushing blade (4) includes multiple auxiliary shafts (5) uniformly fixed to the outside of the stirring shaft (3), and fixed teeth (6) uniformly arranged above and below the auxiliary shafts (5). The outer end of the fixed teeth (6) is provided with an arc-shaped cutting edge (7) located on the flow-facing side, and the surface of the cutting edge (7) is provided with uniform serrations (8). The middle layer mixing blade (9) includes a lower rotating plate (10) and an upper rotating plate (11) fixed to the inner side of the stirring shaft (3). The lower rotating plate (10) is located below the auxiliary shaft (5) and presses the material downward. The upper rotating plate (11) is located below the lower rotating plate (10) and pushes the material upward. The bottom shear blade (12) includes a radially extending airfoil (13), the surface of which has a guide hole (14) and forms an acute angle with the horizontal plane; The three layers of blades are arranged asymmetrically along the axial direction and have independent functions.
2. A mixer according to claim 1, characterized in that: A turbulence plate (15) is provided between the middle layer mixing blade (9) and the bottom layer shearing blade (12). Multiple turbulence plates (15) are uniformly fixed on the outside of the stirring shaft (3), and their surfaces are provided with hemispherical protrusions (16).
3. A mixer according to claim 1, characterized in that: The inner wall of the housing (1) is provided with a flow guide rib group (17), which includes vertical ribs (18) and spiral ribs (19); the flow guide rib group (17) is divided into three layers: the upper layer is composed of the circumferentially distributed downward spiral ribs (19); the middle layer is composed of the circumferentially distributed vertical ribs (18); and the lower layer is composed of the circumferentially distributed upward spiral ribs (19) and the vertical ribs (18) interleaved.
4. A mixer according to claim 3, characterized in that: The height of the vertical rib (18) in the middle layer of the flow guide rib group (17) is greater than the height of the upper spiral rib (19) or the lower spiral rib (19) / vertical rib (18).
5. A mixer according to claim 3, characterized in that: The cross section of the vertical rib (18) is trapezoidal.
6. A mixer according to claim 1, characterized in that: The bottom of the stirring shaft (3) is fixedly connected to an upper conical spiral plate (20).
7. A mixer according to claim 1, characterized in that: The lower rotating plate (10) and the upper rotating plate (11) of the middle layer mixing blade (9) have a preset distance.
8. A mixer according to claim 1, characterized in that: The guide holes (14) of the blade (13) of the bottom shear blade (12) are evenly distributed.
9. A mixer according to claim 1, characterized in that: The serrations (8) of the cutting edge (7) of the fixed tooth (6) of the upper layer breaking blade (4) are of a continuous and uniform structure.
10. A mixer according to claim 2, characterized in that: The hemispherical protrusions (16) on the surface of the spoiler (15) are arranged in an array.