How are plastic extruders classified and what is the difference
The difference between twin screw extruder and single screw extruder: one is one screw, the other is two screws. They are all driven by a motor, and the power varies with the screw. The power of 50 double is about 20kW, and the power of 65 is about 37kW. The output is related to the material and the screw. The output of 50 twin-screw is about 100-150kg/h, and the output of 65 is about 200-280kg/h. The output of a single screw is only half.
Extruders can be divided into single-screw, twin-screw and multi-screw extruders according to the number of screws. At present, the single screw extruder is the most widely used and suitable for the extrusion processing of general materials. 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 large, 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, etc., temperature automatic control, vacuum exhaust, etc. It is suitable for the production of pipes, plates, special-shaped materials and other products.