A multi-layer stirring device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 深圳中慧创新科技有限公司
- Filing Date
- 2025-07-17
- Publication Date
- 2026-06-26
AI Technical Summary
Existing mixing devices are prone to stratification and sedimentation problems when mixing metal fillers with large density differences and plastics, resulting in uneven mixing.
The device employs a multi-layer mixing design, including a tank, a drive assembly, and a mixing assembly. Through the synergistic effect of multiple mixing blades, combined with arc-shaped blades, guide channels, and guide vanes, the material flow path is optimized to ensure uniform mixing.
It effectively avoids the stratification and sedimentation problems in traditional mixing devices, improves the uniform mixing effect of materials, and ensures the full mixing of metal fillers and plastic matrix.
Smart Images
Figure CN224408097U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic processing technology, and in particular to a multi-layer stirring device. Background Technology
[0002] In the field of plastic modification, the introduction of metal fillers (such as aluminum powder and copper fiber) and high-density inorganic particles (such as glass microspheres and silicon carbide) can significantly improve the electrical conductivity, thermal conductivity, and mechanical strength of materials. However, the density of metal fillers is typically 5-10 times that of the plastic matrix (e.g., aluminum has a density of 2.7). Polypropylene has a density of only 0.9. During the mixing process, the superposition of gravity settling and centrifugal force causes dynamic separation of materials with large density differences. This stratification phenomenon directly results in uneven distribution of fillers, causing the composite material to exhibit significant anisotropy.
[0003] Existing technology involves installing multiple layers of agitators within the tank to achieve initial mixing through differential shear rates. Then, fixed guide vanes are added to the inner wall to extend the material flow path and increase mixing time. Finally, surface modifiers (such as silane coupling agents) are introduced to reduce the interfacial tension between the metal filler and the plastic, or a medium-density transition phase (such as hollow glass microspheres) is added to buffer the density difference. However, the macroscopic convection of the ribbon propeller and the high-shear flow field of the turbine propeller interfere with each other, forming a "dead zone" (occupying 10%–15% of the volume) at the bottom edge of the tank. This leads to continuous accumulation of metal filler (measured settling rate > 15%), stratification, and poor modification results.
[0004] Therefore, a new multi-layer stirring device is needed to solve the existing layering problem. Utility Model Content
[0005] The purpose of this invention is to provide a multi-layer stirring device to solve the existing problem of layering.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A multi-layer stirring device includes: a tank forming a stirring chamber; a drive assembly including a motor and a rotating shaft drivenly connected to the motor shaft of the motor, the rotating shaft extending into the stirring chamber; a stirring assembly including a first stirring blade, a second stirring blade, and a third stirring blade, the first stirring blade, the second stirring blade, and the third stirring blade being rotatably disposed on the rotating shaft, the first stirring blade, the second stirring blade, and the third stirring blade being spaced apart along the length of the rotating shaft; a transmission channel is hollowly disposed in the rotating shaft; a return channel communicating with the transmission channel is disposed on the side of the first stirring blade; a first radially outward guide groove is disposed on the surface of the second stirring blade; and a second guide groove is disposed at the bottom of the third stirring blade.
[0008] Furthermore, the surface of the first stirring blade is an arc-shaped curved surface, which is used to guide the fluid through the transmission channel into the transmission channel.
[0009] Furthermore, the second stirring blade includes alternating high-shear blades and adjustable blades; the surface of the high-shear blades is provided with a first radially outward flow guide groove; the depth of the first flow guide groove is 25 mm, and the groove spacing is 15 mm.
[0010] Furthermore, the adjustable blade is provided with a slide rail in the connection area of the rotating shaft, and the adjustable blade is slidably connected to the rotating shaft.
[0011] Furthermore, the bottom of the third stirring blade is provided with a plurality of curved second guide channels. The second guide channels are arc-shaped and the openings of the guide channels face the inner wall of the stirring chamber. The width of the guide channels is 20 mm and the depth is 10 mm. The second guide channels are tightly fitted to the inner wall at the connection with the rotating shaft to guide the material flow path and reduce bottom sedimentation.
[0012] Furthermore, the multi-layer stirring device also includes a guide vane; the inner wall of the tank is provided with a guide vane at the same height as the third stirring blade with an initial tilt angle of 20°; the length of the guide vane is 1 / 5 to 1 / 4 of the tank diameter, and the guide vane is curved, with the edge of the guide vane opposite to the rotation direction of the stirring blade.
[0013] Furthermore, the diameter of the rotating shaft gradually increases from the first stirring blade to the third stirring blade.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] Employing a multi-layered agitator design, this device is suitable for handling materials with significant density differences, such as the mixing of metal fillers and plastics. The unit comprises a tank, a drive assembly, and an agitator assembly. The agitator assembly consists of rotatable first, second, and third agitator blades, each mounted on the same rotating shaft and spaced apart along the shaft's length. The first agitator blade guides fluid into the transmission channel through curved blades. The second agitator blade combines high-shear blades with adjustable blades and features radially outward-facing guide grooves on its surface. The third agitator blade has multiple curved guide grooves at its bottom to prevent material deposition. Furthermore, the tank's inner wall is equipped with guide vanes at a 20° inclination angle to optimize the material flow path. The gradually increasing diameter of the rotating shaft ensures greater torque output for the lower agitator blades, adapting to the mixing requirements of complex materials. Through its optimized torque distribution and fluid guidance structure, this device effectively avoids the stratification and deposition problems found in traditional agitators, significantly improving the uniformity of material mixing. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.
[0017] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the multi-layer stirring device of the present invention;
[0019] Figure 2 This is a schematic diagram of the structure of an embodiment of the multi-layer stirring device of the present invention;
[0020] Figure 3 This is a schematic diagram of the structure of the first blade group in an embodiment of a multi-layer stirring device according to the present invention;
[0021] Figure 4 This is a schematic diagram of the structure of the second blade group in one embodiment of a multi-layer stirring device according to the present invention;
[0022] Figure 5 This is a schematic diagram of the third blade group in one embodiment of a multi-layer stirring device of the present invention.
[0023] Illustration: 100, Tank body; 200, Drive assembly; 300, Stirring assembly; 210, Motor; 220, Rotating shaft; 310, First stirring blade; 320, Second stirring blade; 330, Third stirring blade; 311, Return channel; 321, First guide channel; 322, High shear blade; 323, Adjustable blade; 331, Second guide channel. Detailed Implementation
[0024] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below 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 skilled in the art without creative effort are within the scope of protection of the present utility model.
[0025] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.
[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0027] This utility model provides a multi-layer stirring device that achieves synergy through multiple stirring zones, thereby fully mixing the mixed metal filler and plastic.
[0028] Reference Figure 1 and Figure 2 A multi-layer stirring device includes: a tank 100 forming a stirring chamber; a drive assembly 200 including a motor 210 and a rotating shaft 220 drivenly connected to the motor 210 shaft, the rotating shaft 220 being used to extend into the stirring chamber; a stirring assembly 300 including a first stirring blade 310, a second stirring blade 320, and a third stirring blade 330, the first stirring blade 310, the second stirring blade 320, and the third stirring blade 330 being rotatably disposed on the rotating shaft 220, the first stirring blade 310, the second stirring blade 320, and the third stirring blade 330 being spaced apart along the length of the rotating shaft 220; a transmission channel is hollowly disposed in the rotating shaft 220; a return channel 311 communicating with the transmission channel is disposed on the side of the first stirring blade 310; a first radially outwardly oriented guide groove 321 is disposed on the surface of the second stirring blade 320; and a second guide groove is disposed at the bottom of the third stirring blade 330.
[0029] It should be noted that the core structure of the multi-layer mixing device includes a tank 100, a drive assembly 200, and a mixing assembly 300. The tank 100 forms a mixing chamber to hold the materials to be mixed, and the drive assembly 200 rotates the mixing device. The drive assembly 200 includes a motor 210 and a rotating shaft 220 driven by the motor 210 shaft. The rotating shaft 220 extends into the tank 100 and drives the mixing blades in the mixing assembly 300 to rotate. Specifically, the mixing assembly 300 includes a first mixing blade 310, a second mixing blade 320, and a third mixing blade 330. These three mixing blades are rotatably mounted on the rotating shaft 220 and are spaced apart sequentially along the length of the rotating shaft 220. The first mixing blade 310 is located at the top of the mixing chamber, the second mixing blade 320 is located in the middle, and the third mixing blade 330 is located at the bottom. This arrangement aims to achieve more efficient mixing for materials with different density differences through different mixing layers and the action of different mixing blades. In this structure, the mixing device can simultaneously process materials with significant density differences, avoiding stratification. The hollow transmission channel within the rotating shaft 220 allows for continuous material recirculation during mixing, improving mixing efficiency and reducing stratification caused by the settling of high-density materials. Furthermore, the recirculation channel 311 guides the material more evenly to the lower mixing zone under the guidance of the first mixing blade 310. The surface of the second mixing blade 320 is designed with radially outward-facing guide channels, further optimizing material flow in the middle zone and ensuring more uniform dispersion. The bottom of the third mixing blade 330 features a second guide channel, guiding bottom material upwards and preventing sedimentation. Through these designs, the device achieves efficient mixing of different materials while reducing stratification and sedimentation, ensuring thorough mixing of the metal filler and the plastic matrix.
[0030] Furthermore, in combination Figure 3 The surface of the first stirring blade 310 is an arc-shaped curved surface, which is used to guide the fluid through the transmission channel into the transmission channel.
[0031] It should be noted that the surface of the first stirring blade 310 adopts an arc-shaped curved surface design. The purpose of this special blade shape is to effectively guide the material flow. The arc-shaped curved surface design allows the stirring blade to generate a more uniform fluid distribution when rotating, thereby reducing turbulence in the stirring area. Specifically, the arc-shaped surface helps the material flow uniformly within the stirring chamber, and this curved surface structure can generate more effective hydrodynamic effects during the rotation of the stirring blade, further improving the mixing effect of the material. Unlike straight blades, arc-shaped blades can gradually guide the fluid, allowing it to flow through the transmission channel to the lower layer without material accumulation in the upper layer. The key function of this design is to improve the distribution and flow path of the fluid during stirring, making the mixing of the packing and matrix more uniform. Especially when dealing with materials containing different densities, it can reduce the floating of upper layer materials and prevent stratification. This design provides better material guidance, ensuring the stability and efficiency of the stirring process, thereby helping to avoid stratification problems caused by uneven material distribution.
[0032] Furthermore, in combination Figure 4 The second stirring blade 320 includes alternating high-shear blades 322 and adjustable blades 323; the surface of the high-shear blades 322 is provided with radially outward first guide grooves 321; the depth of the first guide grooves 321 is 25mm and the groove spacing is 15mm; the adjustable blades 323 are provided with slides in the connection area of the rotating shaft 220, and the adjustable blades 323 are slidably connected to the rotating shaft 220.
[0033] It should be noted that the second stirring blade 320 adopts a combination structure of high-shear blade 322 and adjustable blade 323 to enhance the dispersion effect on materials. The high-shear blade 322 is designed to generate strong shear force during high-speed rotation, which is especially suitable for nanoscale fillers or other fine particles that require efficient dispersion. The radially outward first guide channel 321 guides the fluid to form a specific flow direction during stirring by setting a specific guide structure on the blade surface, avoiding material accumulation in the stirring chamber and enhancing the mixing uniformity of the material. Specifically, the channel depth is 25mm and the channel spacing is 15mm. These parameters are selected based on fluid dynamics theory, which can guide the fluid to flow along a specific path while maintaining appropriate shear force, thereby effectively dispersing high-density and low-density materials. To further optimize the stirring effect, the addition of adjustable blade 323 allows users to adjust the blade angle according to different material states, thereby changing the fluid flow pattern. This design enables the stirring device to flexibly respond to different material characteristics and stirring requirements, avoiding the problems of excessive shearing or insufficient stirring when processing specific materials. The advantage of this structure is that it provides precise mixing control for different materials, improves mixing efficiency, and effectively solves the problem of material stratification caused by excessive or insufficient shear force.
[0034] Furthermore, the adjustable blades 323 of the second stirring blade 320 not only have an angle adjustment function, but also have a slide at the connection with the rotating shaft 220, allowing the adjustable blades 323 to slide freely and adjust their angle as needed. The slide design allows for a flexible connection between the blades and the rotating shaft 220, ensuring that the blades can automatically adjust their angle according to the material flow state during the stirring process to achieve optimal stirring effect. The advantage of this design is that it can adjust the stirring angle in real time according to the actual flow of the material, improving stirring efficiency and avoiding energy waste or uneven stirring caused by improper blade angle. Through this flexible blade adjustment mechanism, personalized stirring adjustments can be made for different materials with different viscosity, density, and other characteristics, thereby ensuring uniform material distribution during the stirring process and avoiding stratification or uneven material distribution caused by a single shear force.
[0035] Furthermore, in combination Figure 5 The bottom of the third stirring blade 330 is provided with a plurality of curved second guide channels. The second guide channels are arc-shaped and the openings of the guide channels face the inner wall of the stirring chamber. The width of the guide channels is 20 mm and the depth is 10 mm. The second guide channels are tightly fitted to the inner wall at the connection with the rotating shaft 220 to guide the material flow path and reduce bottom sedimentation.
[0036] It should be noted that the bottom of the third stirring blade 330 is designed with multiple curved second guide channels. These guide channels are arc-shaped, and their openings face the inner wall of the stirring chamber. The purpose is to effectively solve the common bottom sedimentation problem in traditional stirring devices through a special fluid guiding structure. Specifically, the guide channels are 20mm wide and 10mm deep. This design ensures that the material at the bottom can flow smoothly during the rotation of the stirring blade, avoiding the accumulation of bottom packing due to sedimentation. In traditional stirring devices, due to insufficient stirring force or uneven stirring, a so-called "dead zone" often forms at the bottom, leading to the accumulation of heavy materials such as metal packing. This design changes the flow path of the material through the curved guide channels, causing it to flow back along a specific trajectory, avoiding sedimentation and ensuring the uniform distribution of packing throughout the stirring chamber. In addition, the structure of the guide channels fits tightly against the rotating shaft 220 and the inner wall, enhancing the guiding effect and ensuring precise control of the material flow direction, further optimizing the dispersion of the material and reducing stratification problems.
[0037] Furthermore, the multi-layer stirring device also includes a guide vane; the inner wall of the tank 100 is provided with a guide vane at the same height as the third stirring blade 330 with an initial tilt angle of 20°; the length of the guide vane is 1 / 5 to 1 / 4 of the diameter of the tank 100, and the guide vane is curved, with the edge of the guide vane opposite to the rotation direction of the stirring blade.
[0038] It should be noted that the guide vanes are installed on the inner wall of the tank 100, at the same height as the third stirring blade 330, with an inclination angle of 20° and a length of 1 / 5 to 1 / 4 of the diameter of the tank 100. The function of the guide vanes is to guide the material flow and prevent the packing material from accumulating on the tank wall. In traditional mixing devices, the packing material is easily concentrated on the inner wall of the tank 100 due to eddy currents or centrifugal force, resulting in uneven material distribution and even dead zones at the bottom. To avoid this problem, the guide vanes guide the fluid to the mixing area, ensuring that the packing material can flow uniformly throughout the tank 100. The curved shape of the guide vanes further enhances their ability to control the fluid flow, and their direction of rotation relative to the stirring blades effectively disrupts uneven flow patterns, thereby optimizing the material flow path and ensuring effective material dispersion during the mixing process.
[0039] Furthermore, the diameter of the rotating shaft 220 gradually increases from the first stirring blade 310 to the third stirring blade 330.
[0040] It should be noted that the diameter of the rotating shaft 220 gradually increases from the first stirring blade 310 to the third stirring blade 330. This design aims to ensure that the stirring blades at different levels can obtain sufficient torque according to their respective load requirements by changing the structure of the rotating shaft 220. In traditional mixing devices, the uneven mixing efficiency often results from the load differences between the stirring blades at each level. By gradually increasing the diameter of the rotating shaft 220, the lower stirring blades (especially the bottom third stirring blade 330) can obtain greater torque output, thereby effectively mixing denser metal packings while maintaining the normal operation of the upper stirring blades. This design not only optimizes the torque distribution of the mixing system but also avoids excessive shear force caused by excessive torque on the upper blades, which could affect the mixing quality. Preferably, the diameter of the rotating shaft 220 is within the following range: 20mm to 50mm for the first stirring blade 310 portion; 50mm to 70mm for the second stirring blade 320 portion; and 70mm to 100mm for the third stirring blade 330 portion. In addition, the material selection of the rotating shaft 220 is also crucial. For example, alloy steel or stainless steel is often selected, as its strength and corrosion resistance meet the bearing load requirements of the stirring system.
[0041] Through the innovative design of the multi-layer mixing device, combined with the structural differences and mutual cooperation of each mixing blade, the uniform distribution of metal filler and plastic matrix is ensured throughout the mixing process. Each mixing zone has a clearly defined function: the first mixing blade 310 optimizes the guiding flow of the upper material; the second mixing blade 320 enhances the material dispersion effect through the combination of high shear and adjustable blades 323; and the third mixing blade 330 prevents material sedimentation and dead zones through the bottom guide channel. Furthermore, the optimized design of the guide vanes and rotating shaft 220 further ensures uniform mixing of the filler, improves the mixing effect, and avoids stratification. This technical solution effectively solves the stratification problem of traditional mixing devices when mixing metal filler and plastic matrix, and has significant application value.
[0042] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A multi-layer stirring device, characterized in that, The multi-layer stirring device includes: The tank body (100) has a stirring chamber; The drive assembly (200) includes a motor (210) and a rotating shaft (220) that is drivenly connected to the motor (210) shaft of the motor (210), the rotating shaft (220) being used to extend into the stirring chamber; The stirring assembly (300) includes a first stirring blade (310), a second stirring blade (320), and a third stirring blade (330). The first stirring blade (310), the second stirring blade (320), and the third stirring blade (330) are rotatably disposed on the rotating shaft (220). The first stirring blade (310), the second stirring blade (320), and the third stirring blade (330) are spaced apart along the length of the rotating shaft (220). The rotating shaft (220) is hollow and has a transmission channel; the first stirring blade (310) has a return channel (311) connected to the transmission channel on its side; the second stirring blade (320) has a first radially outward guide groove (321) on its surface; and the third stirring blade (330) has a second guide groove at its bottom.
2. The multi-layer stirring device according to claim 1, characterized in that, The surface of the first stirring blade (310) is an arc-shaped curved surface, which is used to guide the fluid through the transmission channel into the transmission channel.
3. The multi-layer stirring device according to claim 1, characterized in that, The second stirring blade (320) includes alternating high-shear blades (322) and adjustable blades (323); The surface of the high shear blade (322) is provided with a first radially outward guide groove (321); The first guide channel (321) has a depth of 25mm and a channel spacing of 15mm.
4. The multi-layer stirring device according to claim 3, characterized in that, The adjustable blade (323) is provided with a slide in the connection area of the rotating shaft (220), and the adjustable blade (323) is slidably connected to the rotating shaft (220).
5. The multi-layer stirring device according to claim 1, characterized in that, The bottom of the third stirring blade (330) is provided with a plurality of curved second guide channels. The second guide channels are arc-shaped and the openings of the guide channels face the inner wall of the stirring chamber. The width of the guide channels is 20 mm and the depth is 10 mm. The second guide channels are tightly fitted to the inner wall at the connection with the rotating shaft (220) to guide the material flow path and reduce bottom deposition.
6. The multi-layer stirring device according to claim 1, characterized in that, The multi-layer stirring device also includes guide vanes; The inner wall of the tank (100) is provided with a guide vane with an initial tilt angle of 20° at the same height as the third stirring blade (330); The length of the guide vane is 1 / 5 to 1 / 4 of the diameter of the tank (100), and the guide vane is curved, with the edge of the guide vane opposite to the rotation direction of the stirring blade.
7. The multi-layer stirring device according to claim 1, characterized in that, The diameter of the rotating shaft (220) gradually increases from the first stirring blade (310) to the third stirring blade (330).