Overview of the extruder

Plastic extruder is divided into twin-screw extruder and single screw extruder, and more rarely seen and non-screw extruder screw extruder
The difference between two kinds of extruder:Single screw and twin screw machines machines: one is a screw, a screw is two. Are used in a motor-driven. Power varies due to the screw double cone of power is about .50 20KW, 65 of about 37KW. screw production and materials related to the production of about 50 conical twin 100-150KG / H, 65 double cone is about 200-280KG / H. yields only a single screw half.
Screw extruder according to their number can be divided into single-screw, twin screw and multi-screw extruder. Currently a single screw extruder is most widely used general materials suitable for extrusion processing. As the twin-screw extruder with less heat generated by friction, materials, subject to uniform shear, a large transmission capacity screw extrusion volume relatively stable, long stay in the machine barrel materials, mix well.
SJSZ series conical twin screw extruder with a force out, high-quality, adaptability, long life, the shear rate is small, the material is not easy to break down, mixing and plasticization performance, direct molding powder characteristics, temperature-controlled , vacuum exhaust and other devices. For tubes, plates, pvc pipe machine and other products production.
Either as a single-screw extruder or molding plastics processing machinery granulating machine has played an important role in recent years, single-screw extruder has been greatly developed. Current German production of large grain with a single screw extruder, screw diameter of 700mm, production of 36t / h.
Single-screw extruder main indicator of development in its key components – the development of the screw. In recent years, there has been a lot of screw theory and experimental research has been nearly a hundred screws, there are separate common type, shear type, barrier type, shunt type and wave type.
Perspective of the development from a single screw, although in recent years has been single-screw extruder better, but with the polymer materials and plastic products continues to develop, but also the emergence of more new features and special single screw screw extruder. Overall, single-screw extruder toward the high-speed, efficient and dedicated direction. Twin-screw extruder feed characteristics, and for powder processing, and more than a single-screw extruder with better mixing, exhaust, response and self-cleaning function, characterized by poor thermal stability of the plastic processing and Total mixing time also show its superiority. In recent years, foreign twin-screw extruder has been a great development, various forms of twin-screw extruder has been serialized and commercialization, production companies is greater.