MANUFACTURE OF PNEUMATIC TIRE

PURPOSE:To make the strength and resistance to fatigue of a butting section good enough for practical use without any problems involved by forming a green tire composed of laminate rubber sheets stuck together with the unvulcanized rubber sheet layer side facing the carcass layer side, applying internal pressure to the green tire by means of a bladder and vulcanization forming. CONSTITUTION:Both ends of a carcass layer 2 of a green tire are semi-cured preliminarily by emitting electron rays to respective ends and butted. A laminate rubber sheet 5 composed of an unvulcanized rubber sheet layer 6 and a semi- cured rubber sheet layer 7 to which electron rays are emitted are stuck together on the tire inner surface of said butting section are stuck together in a manner that its unvulcanized rubber sheet layer 6 side faces the carcass layer 2 side. Thus, when the green tire composed of laminate rubber sheets 5 stuck with the butting section is vulcanization formed by applying internal pressure in a mold, the unvulcanized rubber sheet layer 6 fluidized by heating flows into the opposite side of the butting section through a space of a seam P and forms a sandwich shape after vulcanization forming to increase bonding strength.