1. The last thread of the material port starts to be called the conveying section. The material here cannot be plasticized, but it should be preheated and compacted. In the past, the old extrusion theory believed that the material here was loose, and later proved that the material here was actually It is a solid plug, that is to say, the material here is squeezed like a solid like a plug, so it is its function as long as the transport task is completed.
2. When the second section is called the compression section, the volume of the groove is gradually reduced from large to large, and the temperature is to reach the plasticizing degree of the material. Here, the compression is generated by the conveying section three, where it is compressed to one, which is called the compression ratio of the screw -- 3:1, some machines have also changed, and the finished plasticized material enters the third stage.
3. The third section is the metering section where the material maintains the plasticizing temperature, just as the metering pump accurately and quantitatively transports the melt material to supply the machine head. At this time, the temperature cannot be lower than the plasticizing temperature, generally slightly higher.
High-speed single-screw extruder main use
Pipe extrusion: suitable for PP-R pipe, PE gas pipe, PEX cross-linked pipe, aluminum-plastic composite pipe, ABS pipe, PVC pipe, HDPE silicon core pipe and various co-extruded composite pipes.
Extrusion of sheet and sheet: suitable for extrusion of profiles and sheets of PVC, PET, PS, PP, PC, etc. Extrusion of other various plastics such as silk, rods, and the like.
Extrusion of profiles: Adjusting the extruder speed and changing the structure of the extrusion screw can be applied to the production of various plastic profiles such as PVC and polyolefin. Modified granulation: suitable for blending, modifying and reinforcing granulation of various plastics.