... single key, head Spline, Hexagon, Involute Spline ect. Segment barrel for the twin compounding extruder. Φ25-Φ133mmKinds of single key, head ... and several hollow screw segments which can be replaced easily for different materials. The mixing components adopts building block type, ... flight, prolong life of screw. Easy wearing parts of barrel feed inlet made from imported anti-wear alloy can be improvde ...