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US 7,384,252 B2Granted
Method for producing tire vulcanizing mold and tire vulcanizing mold
AssigneeBridgestone Corporation
InventorsGyoei Iwamoto, Takehiro Kata
Life of this patent
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AssigneeBridgestone Corporation
InventorsGyoei Iwamoto, Takehiro Kata
Estimating the term…
A 3-D solid model of a tire vulcanizing mold is constructed on CAD, lamination models the optimum value of the pitch of which is determined in consideration of molding accuracy and processing time are created by dividing this model in a predetermined lamination direction, slice data for each layer corresponding to the lamination pitch of each segment are created, a sector mold of the tire vulcanizing mold is manufactured by a powder sintering method based on the slice data, and the density of a sintered body is controlled by adjusting the output of a laser beam or the exposure time of the laser beam applied to the powders to provide a density distribution on the plane and in the depth direction of a mold element for each layer so as to obtain a tire vulcanizing mold having a hybrid structure.
A process for manufacturing a tire vulcanizing mold, comprising making the tire vulcanizing mold out of a plurality of mold elements which have fixed density in the thickness direction of the mold and differ from each other in density to provide a density distribution to the mold, and making at least part of a mold element for a tire tread portion out of a sintered member and a mold element for the mating portions of the mold out of a member having fewer pores than the sintered member or no pores.
A tire vulcanizing mold comprising a plurality of mold elements which have fixed density in the thickness direction of the mold and differ from each other in density, wherein a mold element for a tire tread portion is a composed of a sintered body and a mold element for the mating portions of the mold is composed of a member having one of substantially no pores and no pores.
A process for manufacturing a tire vulcanizing mold, comprising the steps of:
Dependencies are inferred from the claim text.