twin screw extruder includes screw, barrel, gearbox,dose feeding, auto feeder, motor driver, and control panel. conical twin screw extruder includes parts pls see the ... followings:the material of all of parts is 38CrMoAL1. screw is 65/132mmm of diameter, L/D is 22:12 ... alloy steel.4. dose feeding, mode is sprial.5. auto feeder, adopts spring spiral feeding6. motor driver, A/C MOTOR, used ...