Conical Twin Screw and Barrel/Cylinder for PVC ceiling panel Size: ... ) Roughness of the surface: Ra 0.4μ M Screw straightness: 0.015mm/m Chrome plating thickness: 0.01 ... , welded inlay on the flight, prolong life of screw. Easy wearing parts of barrel feed inlet made from ... anti-wear alloy can be improvde abrasion performance. Twin screw and barrel made: CINCINNATI, BATTENFELD, KRUSSMAFFEI, BAUSANO and ...