The Yokohama Rubber Co., Ltd.

Mitsuo Tsuji

Kenta Ishii

Koichiro Miyoshi

Yoshiaki Matsumoto

Satoshi Onodera

Yoshinori Izumi

Tsubasa Kitahara

Yuichiro Hisada

Mika Nagashima

Kousuke Shimada

Takeshi Yokoji

Atsushi Iwai

Rinko Kushida

To determine the magnitude of variation in predetermined quality in a longitudinal direction of an elongated tire member formed by bonding a plurality of types of constituent members, X-rays are applied to a predetermined length range of a tire member, which is elongated, from a top surface side of the tire member while conveying the tire member in a longitudinal direction using a conveying device to acquire image data based on X-ray transmittance of the predetermined length range. The image data is input into a calculation device. Based on contrast in the image data, the magnitude of variation in the dimension in the width direction of a constituent member in the longitudinal direction is calculated by the calculation device, the constituent member being formed of unvulcanized rubber having a larger mass and a higher content rate of a specific component in the tire member.

Method and system for inspecting quality of tire member

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.

Tire vulcanization mold and manufacturing method for tire

Provided are a cleaning device and a method for cleaning a vulcanization mold. At the time of cleaning a molding surface of a vulcanization mold by irradiating with a laser beam from a laser head, an inert gas is supplied from a supply nozzle and an irradiation range of the molding surface irradiated with the laser beam is brought into an atmosphere of the inert gas.

Cleaning device and method for cleaning vulcanization mold

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Kanagawa, Japan

Mitsuo Tsuji