Tire, device for extruding unvulcanized tread rubber for the tire, and method of extruding unvulcanized tread rubber for the tire

摘要

A device for extruding an unvulcanized tread rubber for a tire, comprising:a first extruding device main body which extrudes a first unvulcanized rubber which forms a main portion of a tread;a second extruding device main body which extrudes a second unvulcanized rubber which is different from the first unvulcanized rubber;an extrusion head which connects respective distal end portions of the first extruding device main body and the second extruding device main body; anda flow path forming mold which, at a distal end portion of the extrusion head, guides the first unvulcanized rubber and the second unvulcanized rubber out to a mouthpiece,wherein the flow path forming mold has:a first flow path through which the first unvulcanized rubber flows toward the mouthpiece; anda second flow path through which the second unvulcanized rubber flows toward the mouthpiece,and a rubber discharging portion of the second flow path opens at an intermediate portion of the first flow path, which intermediate portion is set apart from path wall surfaces of the first flow path and is a flow path interior.