... PET bottle blown machinery screwbarrel/screwbarrel for blowing bottle/single screw and barrel for PET bottlemachine Specification:45/90, 45/100 ... ,screw tips/screw nozzle,2. single screw barrel3. Twin screw barrel4. Twin Conical screw and barrel(Co-rotating,Counter)5. ... area is enlarged, the cooling is rapid.4, The double screw extruder system can produce PVC plastic pipes, profiles, sheets, boards ...