... and barrel 1.Quality Material Used 2.Custom Production 3.Wear-resistant 4.Bimetallic & Nitrided abs,pvc,pp,pe,pa conical twin ... on developing screw and barrel for more injection and extruder machine models- Main market: South America,Eastern Europe,Mid East/ ... Injection, Extrusion, and Blow Molding applications; relevant accessories(such as die head, gearbox, filter screen changer and so on); plastic ...