Unit features Adopted Conical Double-Screw Plastic Extruder has high pressure and even plastics. Adopted Co-extrusion head makes pipe layered evenly, outside wall smooth as a mirror. Vacuum double stereotypes, spray cooling and with automatic temperature control and drainage function. Traction uses import frequency Control aircraft, three or four tracked crawler clamping, the force heavy and the pipe difficult to deform. Adopted planet Cutter and strong absorption litter distribution function. Production lines use imported PLC control system, easy to operate, and has high automation. Production line can be equipped with different nose, auxiliaries according to need to produce monolayer, Foam-core, spiral foam, air and air-walled spiral wall PVC pipe.