... ISO9001 certified manufacturer 4, turn key project SJ series co-rotating twin screw extruder is adopted an accumulative structure in assembling ... box designing is and structure is compact which feature high rotation speed, high torque output and stable running. The extruder barrel ... , hardness HRC60-64. The extruder screw is made from high-speed tool steel W6Mo5Cr4Vo2, vacuum hardening reach HRC58-62, ...