... pipe extrusion line plastic pipe production line xps foam profile rigid pvc profile extrusion line upvc foam core pipe polycarbonate extrusion ... CO.,ltd and Zhangjiagang Dehua Machine Co.,ltd occupies an area of 20,000 square meters, and owns 7,000-square ... and constructional plumbing, cable protection, etc.2. This line consists of the conical twin-screw extruder, a vacuum forming machine, a traction ...