VENT TYPE SINGLE SCREW EXTRUDER EQUIPPED WITH PIGMENT MASTER BATCH SUPPLY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a vent type single screw extruder equipped with a pigment master batch supply device capable of easily coloring and molding a plastic composite material having a grain pattern. SOLUTION: In a vent type single screw extruder wherein a vent opening part 4 is provided to the side wall of a cylinder having an extrusion screw 2 built therein in a freely rotatable manner, a pigment master batch supply device 6 for continuously supplying a pigment master batch into the cylinder 1 in a vacuum state is provided to the side wall of the cylinder 1 to which the vent opening part 4 is provided.