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 ... all of parts is 38CrMoAL1. screw is 65/132mmm of diameter, L/D is 22:12. barrel, heating mode is cast aluminum ... heating ring, adopts the barrel fan cooling.3. gearbox, adopts inner cycling water cooling, materail ...