Segment screw for twin compounding extruder. dia25-133mm,Kinds of single key, head Spline, Hexagon, Involute Spline ect. Segment ... barrel for the twin compounding extruder. Φ25-Φ133mmKinds of single key, head Spline, Hexagon, Involute Spline ect.,The building ... conveniently. Such design makes it possible to process several kinds of materials with one screw.Base material 38CrMoAlA, Welded ...