PVC hose machine can be divided into single screw extruder, twin screw extruder and multi-screw extruder according to the number of screw. At present, the single screw extruder is widely applied, and is suitable for extrusion processing of general materials. Twin-screw extruder is characterized by less heat generated by friction, more uniform material shearing, larger screw conveying capacity, more stable extrusion volume, long residence in the barrel, and even mixing.
Single screw extruder plays an important role in both plasticizing and granulating machine and forming machine. In recent years, single screw extruder has made great progress.
The twin-screw extruder has good feeding characteristics, is suitable for powder processing, and has better mixing, exhaust, reaction and self-cleaning functions than single-screw extruder. It is characterized by its superiority in processing plastics and blends with poor thermal stability. On the basis of twin-screw extruder, multi-screw extruders, such as Guanghua PVC hose machine, have been developed to process blends with poor thermal stability more easily.
Forming principle of section extruder
The extrusion method of PVC hose machine generally refers to the melting of the plastic at about 200 degrees Celsius and the formation of the desired shape when the melted plastic passes through the mold. Extrusion molding requires a profound understanding of the characteristics of plastics and rich experience in mold design. It is a molding method with high technical requirements.
Extrusion molding is a process in which material is continuously flowing through the die by heating and pressurizing in the extruder, also known as “extrusion molding”. Compared with other molding methods, it has the advantages of high efficiency and low unit cost.
Extrusion process is mainly used for molding thermoplastic plastics and also for some thermosetting plastics. The extruded products are continuous profiles, such as pipes, bars, wires, plates, films, wire and cable cladding, etc. In addition, it can also be used for mixing, plasticizing, granulation, coloring and blending of plastics.