It is could be single screw extruder or twin screw extruder according materials.High production capacity of extrusion on the high quality basis. Lower temperature plasticizing design, ensure high quality sheet extrusion. Material of screw and barrel: 38CrMoAlA, nitrogen quenched (0.4-0.7mm ), Rigidity of screw: >740 , Rigidity of barel >940, the surface of screw is chromeplated Feeding bush with water cooling system