The Yokohama Rubber Co., Ltd.

Rinko Kushida

Koichiro Miyoshi

Mitsuo Tsuji

Yoshiaki Matsumoto

Tsubasa Kitahara

Mika Nagashima

Yoshinori Izumi

A tire vulcanization mold in which a surface roughness in the groove molding portion of the tread molding surface is made smaller than a surface roughness in the land portion molding portion, in which a surface roughness in the groove molding portion is minimized to 0.12 μm or less in a range including at least a main groove molding portion, and in which a surface roughness in the land portion molding portion is made to be 3.2 μm or more, is used to manufacture a tire, and when cleaning the tread molding surface, the tread molding surface is irradiated with a laser beam to remove contaminant adhered to the tread molding surface.

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Kanagawa, Japan

Rinko Kushida