Plastic extruders can be divided into single-screw extruders, twin-screw extruders and multi-screw extruders according to the number of screws. At present, the single screw extruder is the most widely used, 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.
Plastic extruders can be divided into single-screw extruders, twin-screw extruders and multi-screw extruders according to the number of screws. At present, the single screw extruder is the most widely used, 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.
Single-screw extruder occupies an important position as a plasticizing granulating machine or a molding processing machine. In recent years, the single-screw extruder has made great progress.
The twin-screw extruder has good feeding characteristics and is suitable for powder processing. It has better mixing, venting, reaction and self-cleaning functions than the single-screw extruder. It is characterized by processing and blending plastics with poor thermal stability. The material time shows its superiority. Based on the twin-screw extruder, in order to make it easier to process blends with poor thermal stability, a multi-screw extruder, such as Guanghua Plastic Extruder, has been developed.
1. According to the number of screws, it is divided into single-screw extruder, twin-screw extruder and multi-screw extruder;
2. according to whether there is a screw in the extruder, it is divided into screw extruder and plunger extruder;
3. According to the operating speed of the screw:
Ordinary extruder: the speed is below 100r/min;
High-speed extruder: the speed is 100~300r/min;
Super high-speed extruder: the speed is 300~l500r/min.
4. Classification according to the assembly structure of the extruder: there are integral extruders and separate extruders;
5. According to the spatial position of the screw in the extruder, it can be divided into horizontal extruder and vertical extruder;
6. According to whether the extruder is vented during processing, it can be divided into vented extruder and non-vented extruder.