... and hard thermoplastics, such as polyviyl chloride (PVC), polyethylene etc. Single screw extruder is mainly used in extruding soft and hard thermoplastics, such ... machine (including shaping machine head) to produce several kinds of plastic products, for example: Film, pipe, rod, plate, thread, cable insulating ... noise, steady operation, large loading, long life and so on. Single-Screw Extruder