... sheet extruder ZHP-670D series two-layer plastic sheet extruderUSE:ZHP-670D three layer plastic sheet extruding machine was designed and make ... at home and abroad.It is mainly used to produce plastic sheet of PP,PS,PE,HIPS,they are the materials ... of extruder, three-roller calendar, traction, rewinding and electric control box..etc7. The screw, material barrel, screen changer, measurement pump, die ...