SCREW FOR EXTRUDER AND METHOD OF MANUFACTURING THE EXTRUDER, AND RUBBER MEMBER FOR TIRE AND METHOD OF MANUFACTURING THE RUBBER MEMBER

摘要

A screw (12) for an extruder (10) rotatably supported on the cylinder (11) of the extruder and carrying roll-heated rubber material supplied from a hopper port (13s) provided at the rear part of the cylinder (11), wherein the height of the flight part (12z) of the screw (12) positioned at the lower part of the hopper port (13s) is set lower than the height of the flight part (12a) on the downstream side of the screw (12), whereby the pulsation of extruded matter can be reduced while maintaining a high discharge rate.