Due to the fact that the twin-screw extruder
has less heat generated by friction, the shearing of the material is relatively uniform, the conveying capacity of the screw is larger, the extrusion volume is relatively stable, the material stays in the barrel for a long time, and the mixing is uniform. The twin-screw extruder has the characteristics of forced extrusion, high quality, wide adaptability, long life, low shear rate, difficult material decomposition, good mixing and plasticizing performance, direct powder molding, temperature control, vacuum exhaust, etc. Device. It is suitable for the production of pipes, plates, special-shaped materials and other products. Twin screw extruder is composed of transmission device, feeding device, barrel and screw, etc. The function of each component is similar to that of single screw extruder. The difference from the single-screw extruder is that there are two parallel screws in the same barrel in the twin-screw extruder. Twin-screw extruder features: 1. High speed and relatively close relative movement speed at different positions in the meshing zone, so it can produce strong and uniform shear. 2. The geometric shape determines that the longitudinal flow channel must be open, so that material exchange occurs between the two screws. During the exchange, the material originally at the bottom of one screw groove will move to the top of the other screw groove. The opening of the longitudinal flow channel also makes it possible to open the transverse flow channel to realize the exchange of materials between adjacent grooves of the same screw. This makes the co-rotating twin-screw have better distributive mixing ability. In the process of starting the heating of the twin-screw extruder, the temperature of several segments is turned on and the heating is started. Of course, this method is also more commonly used, but this will often happen after the temperature of the screw reaches the inevitable goal. The temperature of the die head has not yet reached (the steel of the die head is thicker and the area is relatively large), so everyone usually keeps the screw in this condition, and then waits for the temperature of the die head to gradually rise to the set temperature Just start to boot, this approach is power-saving. The application value of twin-screw twin-screw extruder is becoming more and more important, more and more deeply rooted in people's hearts, and people's attention. In daily life, many customers require the use of twin-screw extruders, because this machine can produce some excellent and powerful twin-screws. With the needs of production and technological progress, the quality requirements of twin-screws are becoming more and more stringent. If twin-screw extruders are not for the emergence of twin-screw Work brings convenience.
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