Performance and advantages: SJZ80 and SJZ65 twin screw extruders are available for choice according to different requirements of pipe diameter and output; Double tube mold evenly distributes the amount of material, fast extrusion speed and good plasticizing; High efficiency double vacuum cooling box can be controlled separately, easy to adjust and operate in the production process; Dust-free cutting machine, double station control, fast speed, accurate cutting length. Pneumatic rotary clamping, no replacement of clamping block. Optional with chamfering device.