... pipe water drainage pipe, electric conduit, etc., conical twin-screw extrusion equipment configuration of tubing, the corresponding mould, ... SGC630 and models:3.Adopts conical twin-screw extruder features:4.Adopts unique design of screw, material in barrel inside short ... cooling effect is good, precision temperature control,6.Adopts screw core temperature control system adopted, Using vacuum exhaust ...