... screw extruder 3.extruding PVC pipe, sheet, profile , granule ,window plastic sheet machine: The SJSZ series conical twin screw extruder with specifically screws ... modifying and pelletizing .It also can deal with the wood plastic material .You can choose the drive motor is D.C ... PVC,PE,PP pipes, sheets,profile , granule .double screw extruder plastic sheet machine