According to the number of screws, extruders can be divided into single-screw, twin-screw and multi-screw extruders. Now single-screw extruders are widely used and are suitable for extrusion processing of general materials. The twin-screw extruder has the characteristics of less heat generated by the conflict, more uniform shearing of the material, greater conveying ability of the screw, more stable extrusion, the material stays long in the barrel, and the mixing is uniform.
The SJSZ series conical twin-screw extruder has the characteristics of forced extrusion, high quality, wide adaptability, long life, low shear rate, difficult material differentiation, good mixing and plasticization performance, direct powder molding, etc., and the temperature is automatically controlled. Vacuum exhaust and other equipment. It is suitable for the production of pipes, plates, special-shaped materials and other products.
Single screw extruder occupies an important position whether it is a plasticizing granulating machine or a forming processing machine. In recent years, single screw extruder has been greatly developed. Large-scale pelletizing single screw extruder produced in Germany with a screw diameter of 700mm and an output value of 36t/h.
The primary sign of the development of a single-screw extruder is the development of its key part-the screw. In recent years, people have conducted a lot of theoretical and experimental research on the screw. There are nearly a hundred types of screw, the common ones are separate type, shear type, barrier type, split type and wave type.