Corresponding to the different requirements of pipe diameter and output, there are two types of SJZ80 and SJZ65 special twin-screw extruders optional; the dual pipe die evenly distributes the material output, and the pipe extrusion speed is quickly plasticized. High-efficiency double-vacuum cooling box can be controlled separately, and the adjustment operation is convenient in the production process. Dustless cutting machine, double station independent control, fast speed, accurate cutting length. Pneumatically rotating clamps eliminates the need to change clamps. With chamfering device optional.