... and barrel for PET bottlemachine Specification:45/90, 45/100, 50/105, 51/105, 55/110, 55/120, 58/124, 60 ... the screw and barrel are the important parts for plastic extruders and injection molding machine,they affect the machine performance and quality directly, ... screw barrel12.Blocks screw13.Gear box14.screw barrel for blowing molding machine 1, Conical twin screw extruder is special equipment ...