Detailed Product Description screw extruder can extrude various kinds of thermoplastics into tubes, sheets, boards, films, profiles, etc When equipped with related screw and auxiliary parts. Moreover, it can be qualified for the process of modifying plastics and pelletizing powders. The machine adopts AC motor infinite speed variation by frequency converter, overload protection, trouble alarm, constant oil temperature in th escrew blower cooling in the barrel and he devices of vacuum exhuasting as well an fixed quantity feeding.plastic extruder plastic extruder