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xiangdajixie@foxmail.com
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Xiangda Machinery Manufacturing Co., Ltd., No. 35 Zhuhuang Road, Zhutang Town, Jiangyin City
Jiangyin Xiangda Machinery Manufacturing Co., Ltd
Working principle and characteristics of screw belt mixer
Date: 2025-05-22Read: 7
Spiral belt mixer can be divided into three types according to its structure: horizontal, conical, and vertical. Its core working principle is based on the bi-directional convective motion generated by spiral blades, but the specific implementation methods vary.
The working principle of the screw belt mixer:
1. Horizontal screw belt mixer
Adopting a double-layer or three-layer spiral blade design, the inner spiral pushes the material from the axis to both sides, while the outer spiral gathers the material from both sides to the axis, forming bidirectional convection.
The cylinder has a U-shaped structure, and the material is rolled, sheared, and diffused under the traction of internal and external spirals, achieving uniform mixing in a short period of time.
The auxiliary flying knife structure can crush agglomerated materials and improve mixing efficiency.
5. Cone type spiral belt mixer
The inverted conical cylinder is equipped with double-layer spiral belts. The outer spiral lifts the material from the bottom to the top, while the inner spiral transports the material from the top to the bottom, forming a circulating convection.
The material falls by its own weight and forms an irregular composite motion (diffusion, convection, shear) in three-dimensional space inside the conical container.
3. Vertical screw belt mixer
By driving the spiral belt to rotate with a vertical spiral shaft, the material is lifted from bottom to top along the wall of the container and then freely falls, achieving positive displacement mixing.
The gap between the mixing shaft and the container wall is extremely small to prevent adhesion, and the shaft sealing structure is far away from the material area, reducing the risk of contamination.
The core features of the screw belt mixer are:
1. Efficient mixing and low energy consumption
The bidirectional convection mechanism shortens the mixing time (usually 3-15 minutes), has high mixing uniformity, and low power consumption.
2. Wide applicability
Can handle powders, particles, and viscous materials (such as lithium battery materials, real stone paint, chemical powders, etc.).
Wear resistant materials (carbon steel/stainless steel) and flying blade structure are suitable for crushing requirements.
3. Flexible structural design
The horizontal body has a low height, making it easy to install; The conical shape has a small footprint and can be equipped with a jacket for heating/cooling.
Vertical shaft seal design extends equipment life and reduces maintenance costs.
4. Functional scalability
Support the addition of spray devices and jacket temperature control (thermal oil/steam/cold water) to meet special process requirements.
Spiral belt mixer is mainly used for lithium battery materials, food additives (such as meal replacement powder), dry powder mortar, chemical raw materials, pharmaceutical powders, etc.
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