... Plastic extruder 1.excellent extruding capacity. 2.double screw extruder 3.make small diameter pipes UPVC Plastic extruderProduction name:Double Screw UPVC Pipe Making Line / Plastic ... Pipe Making Machine, Plastic Pipe Production Line:PVC, CPVC, UPVC Pipe Making Machine, Plastic Pipe Production Line SJPGZ series plastic pipe ... of conical (parallel) double-screw extruder, vacuum sizing platform, tractor, ...