Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Yuichiro Mizuta

Yasuhiko Fujieda

Masahiro Doe

Masatake Toshima

Ryota Ohchi

A marking system comprises plural marking heads disposed side-by-side in a horizontal direction, each of the marking heads performing printing on a surface of a tire by thermal transfer with a thermal transfer tape when the each of the marking heads is in proximity to the surface of the tire, air cylinders provided with the respective marking heads and moving the respective marking heads in proximity to the surface of the tire to make the respective marking heads perform printing, a linear actuator moving the marking heads and the air cylinders in the horizontal direction, and a controller selecting at least one of the marking heads and controlling the linear actuator to move the selected at least one of the marking heads to a position opposite the tire, thereby making the selected at least one of the marking heads perform printing.

Marking system

A tire vulcanizing method reduces consumption energy and increases productivity of vulcanization. This method involves supplying an inert gas to an internal space of the tire via a supply pipe, discharging the gas from the internal space via a return pipe, and supplying the gas from the return pipe to the supply pipe by a rotation type circulation device. A heating device heats the circulated gas. An internal outlet gas temperature sensor detects a temperature of the gas in the return pipe. A controller decreases a rotating speed of the circulation device when the return pipe gas temperature is a rotating speed decrease temperature or more.

Tire vulcanizing method, and tire vulcanizer

In a tire vulcanizer having two sets of portions, each of which includes a lower mold, an upper mold, and a center mechanism provided with a bladder, a nitrogen gas heated in a first heating device is supplied to an interior of the bladder of the center mechanism which is placed on the upstream side in the circulating direction of the nitrogen gas. The nitrogen gas discharged from the interior of the bladder of the center mechanism is used for vulcanization and patterning and a temperature thereof is lowered. However, this nitrogen gas is heated again in a second heating device, so that the temperature is increased. Therefore, the nitrogen gas heated in the second heating device is supplied to an interior of the bladder of the center mechanism which is placed on the downstream side in the circulating direction of the nitrogen gas.

Tire vulcanizer and tire vulcanizing method

In a center mechanism of a tire vulcanizer of the present invention, in order to improve working efficiency and lower total height, after a green tire is vulcanized and patterned and becomes a vulcanized tire, a bladder well is lifted from a bottom position where a lower bead ring is positioned on a lower mold and a bladder is installed in the green tire to a top position where the lower bead ring is positioned above the lower mold and an upper clamp, and the upper clamp, a lower clamp, and the bladder are placed in the bladder well, while heights of the upper clamp and the lower clamp are fixed.

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Takasago, Japan

Yuichiro Mizuta