Parallel Twin Screw & Barrel for extruder 

Brief introduction： Parallel Twin Screw&Barrel Basic parameters： Product category: corotating bon-screw & barrel,  counter-rotating parallel twin-screw & barrel Surface processing technology: nitriding, alloy spraying,  chrome plating, etc. Nitriding hardness HV: 860-980 Straightness: 0.05mm              Surface finish Ra     ：Ra≤0.2 Scope of application： It is suitable for extrusion of PVC pipes, profiles and sheet foam products. It is suitable for CPVC pipe extrusion.  Composition and process： Screw Produced with High-quality 38CrMoALA or 1.8550 forging material, with quenching and tempering to HV290-320, flight surface made with nickel alloy plasma welding, alloy thickness≥1.7mm, hardness≥HRC58, nitriding by NITREX process after finishing machine, nitriding depth: 0.5-0.7mm, hardness: HV860-980…