-Adopting two sets of conical twin-screw extruder with reverse outward rotation

-Co-extrusion die, spiral grooved core-rod for option order to produce foam core pipe with in wall and hollow wall pipe with screw thread.

-Adopting vacuum calibrating and spray cooling baths, accurate calibration, fast cooling, the baths are made of stainless steel. Adopting two caterpillars haul-off unit with speed adjusted by inverters

-Concentrate control, high automation, easy operating