Rubber extrusion molding die, tire molding rubber component, and method for manufacturing tire molding rubber component

摘要

PROBLEM TO BE SOLVED: To stabilize the state of boundary surfaces between two or more rubbers by preventing air inclusion between rubber layers effectively in integrating the rubbers and extrusion-molding the rubbers.SOLUTION: A die for rubber extrusion molding includes a pre-die 2 having a confluent part 8 in which two or more rubbers are joined and a nozzle 4 which discharges the rubbers joined in the pre-die 2, and the pre-die 2 is provided with a passage for supplying a second rubber 11 constituting the lower surface of a molding from below to a first rubber 10 flowing in the horizontal direction.