A stirring device for preparing conductive paste

Abstract

The utility model provides a kind of stirring device for conductive slurry preparation, including horizontal semicircular stirring tank, spiral stirring shaft being arranged along the length direction of stirring tank, driving mechanism being connected with spiral stirring shaft, feeding opening being arranged in the upper or one end of stirring tank, discharge port being arranged in the other end or bottom of stirring tank, the both ends of spiral stirring shaft are equipped with bearing structure, and sealing structure is arranged at its through stirring tank wall place.Through above-mentioned structure, the device can realize the continuous conveying and efficient mixing of conductive slurry raw materials, improve slurry uniformity and reduce the risk of leakage, suitable for the industrialized preparation process of high-viscosity conductive material.

Description

Technical Field

[0001] This utility model relates to the technical field of stirring devices, and in particular to a stirring device for preparing conductive slurry. Background Technology

[0002] In the electronics, battery, and solar energy industries, conductive pastes are widely used as key functional materials in the preparation of conductive films, electrode pastes, electrothermal coatings, and other products. Conductive pastes are typically composed of conductive powders (such as carbon powder, silver powder, and copper powder) mixed with liquid components such as polymer carrier liquids and dispersants. They require good dispersibility and stability to ensure the conductivity and processing adaptability of the final product.

[0003] Most existing conductive paste mixing equipment uses traditional high-speed dispersers, roller mills, or planetary mixers. While these devices can achieve powder-liquid mixing to some extent, they have the following drawbacks: First, powder agglomeration easily occurs during the mixing process, leading to uneven mixing; second, most of the equipment operates intermittently, resulting in limited capacity and low efficiency; and third, the equipment has a complex structure, is inconvenient to clean and maintain, and has relatively high energy consumption, making it difficult to meet the needs of large-scale continuous production of conductive pastes.

[0004] To address the aforementioned issues, spiral mixing structures are widely used in industrial mixing due to their strong pushing force, good mixing fluidity, and simple structure. However, ordinary spiral mixing devices have not yet been optimized for materials with high viscosity and stringent dispersion requirements, such as conductive slurries. Their performance in terms of slurry mixing uniformity, continuity, and equipment sealing still needs improvement.

[0005] In view of this, the inventors specifically designed a stirring device for preparing conductive slurry, and this invention arises from this. Utility Model Content

[0006] The purpose of this application is to provide a stirring device for preparing conductive slurry, which at least solves the problems of uneven mixing, poor material dispersion, and low efficiency of continuous operation during the preparation of conductive slurry.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This application provides a stirring device for preparing conductive slurry, characterized in that it includes: a stirring tank, which is a horizontal semi-circular structure for containing the raw materials of conductive slurry; a spiral stirring shaft arranged along the length direction of the stirring tank, the spiral stirring shaft being provided with spiral blades; a drive mechanism, located at one end of the stirring tank and connected to the spiral stirring shaft via a coupling, for driving the spiral stirring shaft to rotate; a feed port, located above or at one end of the stirring tank, for adding the conductive slurry raw materials; a discharge port, located at the other end or bottom of the stirring tank, for discharging the stirred conductive slurry; bearing structures at both ends of the spiral stirring shaft for supporting the spiral stirring shaft; and a sealing structure at the portion of the spiral stirring shaft passing through the wall of the stirring tank for preventing slurry leakage.

[0008] In a further embodiment, the spiral blades are spirally distributed along the axial direction of the spiral stirring shaft, and the pitch of the spiral blades gradually decreases according to the length of the stirring tank.

[0009] In a further embodiment, the inner wall of the mixing tank is provided with a wear-resistant coating or an anti-adhesion coating.

[0010] In a further embodiment, the drive mechanism is a variable frequency motor, which is electrically connected to a variable frequency controller to adjust the rotational speed of the spiral stirring shaft.

[0011] In a further embodiment, both ends of the spiral stirring shaft are fixedly connected to the stirring tank via rolling bearings.

[0012] In a further embodiment, a base for fixing the mixing tank is also provided.

[0013] In a further embodiment, the base is symmetrically provided with protective plates adapted to the shape of the mixing tank for clamping.

[0014] In a further embodiment, a protective seat is provided between the drive motor and the stirring tank to reinforce and protect the drive motor.

[0015] Compared with the prior art, the present invention has the following advantages: By adopting a horizontal semi-circular mixing tank and a spiral mixing shaft, combined with a frequency conversion drive mechanism, bearing support, and sealing device, the uniformity and dispersion of the conductive slurry during the mixing process are improved, and a continuous and efficient operation process is achieved. At the same time, by setting an anti-adhesion coating, a structurally reinforced base, and a protective plate in the mixing tank, the stability, durability, and ease of operation of the equipment are further enhanced, solving problems such as uneven mixing, easy leakage, and cumbersome maintenance of traditional equipment.

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0017] in: Figure 1 This is a schematic diagram of the overall structure of the present utility model. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present utility model. Figure 2 ; Figure 3 This is a schematic diagram showing the overall assembly structure of the spiral stirring shaft of this utility model; Figure 4 This is a schematic diagram highlighting the overall structure of the mixing tank of this utility model.

[0018] Label Explanation: 1. Mixing tank; 11. Anti-adhesion coating; 2. Spiral mixing shaft; 21. Spiral blades; 3. Drive mechanism; 31. Coupling; 22. Bearing structure; 4. Feed port; 5. Discharge port; 6. Sealing structure; 7. Frequency converter; 8. Base; 9. Protective plate; 10. Protective seat. Detailed Implementation

[0019] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] This embodiment provides a spiral stirring device suitable for the preparation process of conductive slurry. Its overall structure is compact and its operation is stable. It is particularly suitable for the powder-liquid mixing process of conductive slurry with high viscosity and high dispersion requirements, and can significantly improve the uniformity and production efficiency of conductive slurry.

[0021] like Figure 1 and Figure 2 As shown, the mixing device includes a horizontal, semi-circular mixing tank 1, which is the core containing structure of the device and is used to contain various raw materials for the conductive slurry. The cross-section of the mixing tank 1 is arc-shaped or semi-circular, which facilitates effective convection of materials under the action of gravity and spiral force, thereby improving the mixing uniformity. To enhance service life and facilitate cleaning, preferably, a wear-resistant coating or anti-adhesion coating 11, such as a fluoroplastic coating or a ceramic nano-coating, is provided on the inner wall of the mixing tank 1.

[0022] A spiral stirring shaft 2 is arranged along the length of the mixing tank 1. The spiral stirring shaft 2 has a cylindrical structure with several spiral blades 21 on its outer surface. The spiral blades 21 are preferably distributed equidistantly or with varying pitch in a spiral pattern along the axial direction. The blade pitch can gradually decrease according to the length of the mixing tank 1 to adapt to the flow rate and shear strength of the liquid at different mixing stages. This structure can improve the fine mixing effect of conductive powder and liquid components while maintaining propulsion capacity and reducing agglomeration.

[0023] like Figure 1 and Figure 3 As shown, one end of the spiral stirring shaft 2 is connected to a drive mechanism 3 via a coupling 31. The drive mechanism 3 is preferably a variable frequency motor and is equipped with a variable frequency controller 7 to adjust the speed of the spiral shaft. By adjusting the speed, parameters can be matched according to different conductive slurry formulations and viscosities to ensure that the slurry is fully dispersed and does not easily settle. To further ensure the stability and service life of the drive mechanism 3, a protective seat 10 is provided between the drive motor and the stirring tank 1 to prevent damage to the motor from external vibration or slurry splashing.

[0024] like Figure 1 and Figure 2 As shown, a feeding port 4 is provided above the mixing tank 1. This feeding port 4 can be directly connected to a raw material supply device (such as a screw feeder or a weighing and feeding system) to achieve automated addition of powder or liquid components. A hopper or funnel structure is provided above the feeding port 4 to facilitate rapid feeding and prevent dust. At the same time, a discharge port 5 is provided at the bottom of the mixing tank 1 or at one end away from the drive mechanism 3 to discharge the mixed conductive slurry. The discharge port 5 is preferably equipped with an electric or pneumatic control valve to precisely control the discharge rhythm and meet the needs of continuous production lines.

[0025] To ensure the operational stability of the spiral stirring shaft 2, rolling bearings are provided at both ends of the spiral stirring shaft 2, and are fixedly connected to the stirring tank 1 structure through bearing seats. The bearing structure 22 provides both axial and radial support and reduces frictional resistance during operation. To prevent slurry leakage and dust from entering the bearing cavity, a sealing structure 6, such as a double-layer mechanical seal or a corrosion-resistant elastic sealing ring, is provided where the spiral stirring shaft 2 exits the wall of the stirring tank 1, thereby effectively improving the airtightness and environmental adaptability of the device.

[0026] like Figure 2 and Figure 4 As shown, the entire mixing tank 1 is mounted on the base 8 structure. The base 8 has sufficient rigidity and load-bearing capacity to ensure the overall stability of the equipment operation. Clamping guard plates 9 can also be symmetrically installed on both sides of the base 8 to assist in clamping the mixing tank 1 and preventing vibration, making it particularly suitable for installation in fixed positions on workshop production lines.

[0027] The design of this device takes into account structural strength, stirring effect, operational safety and maintenance convenience. Through structural optimization of key parts (such as variable pitch blade design, protective seat 10, frequency conversion drive, etc.), it is not only suitable for the preparation of conventional conductive pastes, but also for the preparation of high-concentration, high-viscosity paste systems such as silver paste, graphene paste, carbon nanotube paste, etc.

[0028] In summary, the stirring device for preparing conductive paste provided by this utility model breaks through the limitations of traditional intermittent mixing equipment in terms of mixing efficiency and powder dispersion uniformity. Through continuous propulsion stirring, variable speed control and sealing structure optimization, it can meet the actual needs of industrial preparation of high-performance conductive paste.

[0029] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A stirring device for preparing conductive paste, characterized in that, include: The mixing tank is a horizontal, semi-circular structure used to hold the raw materials for the conductive slurry. A spiral stirring shaft is provided along the length of the stirring tank, and spiral blades are provided on the spiral stirring shaft; A drive mechanism is located at one end of the mixing tank and connected to the spiral mixing shaft via a coupling, for driving the spiral mixing shaft to rotate. A feeding port is located above or at one end of the mixing tank for adding conductive slurry raw materials; The discharge port is located at the other end or bottom of the mixing tank and is used to discharge the conductive slurry after mixing. The spiral stirring shaft is provided with bearing structures at both ends for supporting the spiral stirring shaft; The portion of the spiral stirring shaft that passes through the mixing tank wall is equipped with a sealing structure to prevent slurry leakage.

2. The stirring device for preparing conductive paste according to claim 1, characterized in that, The spiral blades are spirally distributed along the axial direction of the spiral stirring shaft, and the pitch of the spiral blades gradually decreases according to the length of the stirring tank.

3. The stirring device for preparing conductive paste according to claim 2, characterized in that, The inner wall of the mixing tank is provided with a wear-resistant coating or an anti-adhesion coating.

4. The stirring device for preparing conductive paste according to claim 1, characterized in that, The drive mechanism is a variable frequency motor, which is electrically connected to a variable frequency controller to adjust the speed of the spiral stirring shaft.

5. The stirring device for preparing conductive paste according to claim 1, characterized in that, The bearing structure is a rolling bearing and is fixedly connected to the stirring tank.

6. The stirring device for preparing conductive paste according to claim 1, characterized in that, A base is also provided for fixing the mixing tank.

7. The stirring device for preparing conductive paste according to claim 6, characterized in that, The base is symmetrically provided with protective plates adapted to the shape of the mixing tank for clamping.

8. The stirring device for preparing conductive paste according to claim 4, characterized in that, A protective seat is provided between the variable frequency motor and the mixing tank to reinforce and protect the variable frequency motor.

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