... barrel are the important parts for plastic extruders and injection molding machine,they affect the machine performance and quality directly,therefore, ... any specification of extruder screw barrel and injection molding screw barrel for Haitian,Demag,Engle,Nigrobossi,KMD,NPM,BOY, ... barrel12.Blocks screw13.Gear box14.screw barrel for blowing molding machine 1, Conical twin screw extruder is special ...