Parallel Twin Screw Barrel PVC Granule Extrusion Screw Barrel

Twin Parallel Twin Screw and Barrel, bimetallic screw barrel for Recycled Plastic, plastic machinery screw barrel, PVC granule extrusion screw barrel Specification: Diameter: Φ 45mm-Φ 200mm L/D ratio: 16-35 The compression ratio of screws can be designed according to different products and ingredients Base Materials: (1)38CrMoAlA(JIS SACM645) (2)42CrMo(AISI 4140) (3)4Cr5MoSi V1 (JIS SKD-61) (4)9Cr18MOV (5)HPT Bimetallic alloy materials: 1)Fe-based alloy 2)Ni-based alloy/Deloro alloy 3)Co-based alloy 4)NiCo-based alloy 5)Tungsten carbide/Wolfram carbide Technics: Heat treatment High-frequency quenching Nitriding treatment Hard-chrome electroplating Bimetallic alloy welding Bimetallic alloy centrifugal casting Technical parameter: Nitrided layer depth: 0.5-0.8mm Nitrided hardness: 900-1000HV Nitrided brittleness: Less than grade 1 Surface roughness: Ra0.4 Linearity of screw: 0.015mm Hard-chrome plating hardness after nitr…