PURPOSE: To obtain a good quality tire having no ply separation, by a method wherein after a through hole has been bored on an unvulcanized rubber sheet by irradiating a laser ray to the sheet an unvulcanized tire is molded by bonding the sheet to the other constituent component of the tire and then vulcanization is applied to the same.
CONSTITUTION: A laser ray is projected to an unvulcanized rubber sheet S constituting constituent components of the tire such as an inner liner and a tread and a through hole 10 is bored by making the rubber at the irradiated portion heat, fuse and evaporate. Then the unvulcanized rubber sheet S and the other constituent component Sa of the tire are bonded together, an unvulcanized tire having no residual air between the constituent components is molded and then a desired product is obtained by vulcanizing the unvulcanized tire. With this construction, reliable prevention of ply separation resulting from the residual air between the constituent components of the tire becomes possible and a quality of the product tire is improved drastically.
NISHIMOTO TATSUO
KURACHI TETSUO
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