Extruders can be divided into single screw, twin screw and multi screw extruder according to the number of screws. At present, the single screw extruder is the most widely used, suitable for extrusion processing of general materials. Twin screw extruder has less generated by friction , relatively uniform shearing of the material, large screw conveying capacity, relatively stable extrusion volume, long residence time of the material in the barrel, and uniform mixi ng. SJSZ series conical twin-screw extruder has the characteristics of forced extrusion, high quality, wide adaptability, long life, low shear rate, difficult decomposition of materials, good mixing and plasticizing performance, direct molding of powder materials, etc., with automatic temperature control, Vacuum exhaust and other devices.

In recent years, people have carried out a lot of theoretical and experimental research on the screw, and there are nearly a hundred kinds of screws so far, and the common ones are separation type, shear type, barrier type, shunt type and corrugated type. From the perspective of single-screw development, although single -screw extruders have been relatively perfect in recent years, with the continuous development of polymer materials and plastic products, more characteristic new-type screws and special single-screw extruders will emerge.

In the plastic extrusion molding equipment, the plastic extruder is usually called the main engine, and the subsequent equipment plastic extrusion molding machine is called the auxiliary machine. Plastic extruder derives twin-screw, multi-screw, even does not have different types of machines such as screw rod by original single screw rod through 100 years of development. Since plastic extruders serve various industries and develop in depth, it is possible to transition to guiding market consumption. In various ways, improve the technical level. This will not only help to improve the overall level of the industry, but also help the whole industry to develop in the direction of social professional cooperation and enhance international competitiveness.