PLASTIC CONICAL DOUBLE SCREW EXTRUDER: 1>used for PVC material 2>PVC pipe, ... ,65/132,80/156,90/188. PLASTIC CONICAL DOUBLE SCREW EXTRUDER/plastic machine: This series of conical double screw extruder is specializing in extruding pipes using ... sheets, PVC rods and pellets can produced by this main machine. FEATURES: 1> The screw adopts circulating oil cooling device, so ...