Segment screw for twin compounding extruder. dia25-133mm,Kinds of single key, head Spline, Hexagon, Involute Spline ect. Segment barrel for ... Φ25-Φ133mmKinds of single key, head Spline, Hexagon, Involute Spline ect.,The building block screw consists of core spindle and several ... it possible to process several kinds of materials with one screw.Base material 38CrMoAlA, Welded inlay on the flight, ...