Single Screw Extruder: High Speed, High Efficiency Extrusion Single Screw Extruder Is Specially Designed For Extruding Pe Material, Grooved Barrel, Equipped With The Lower Noise Fan, High Speed And Hard Gear Reducer. The Inner And Outer Layers Of The Corrugated Pipe Are Independently Feed Material By Two Extruders. It Can Make The Inner And Outer Layers Produce Different Material And Guarantee High Efficiency Extruding. Die Head: The Extrusion Die Head Has Two Channel Structure, Nitriding And Polishing Handling, Special Designed Mouth Molds, Suitable For Different Material And Different Ring Stiffness Pipe Production. The Special Mold Structure Assures The Inner And Outer Layer Wall Thickness Even And Forming Stability.