Toyo Tire Rubber Co., Ltd.

Masami Tanabe

Tetsuo Tatara

Taizo Yamamoto

Yu Hatayama

Shigeo Kudo

The invention can surely accomplish lamination without the generation of voids in building a tire constructed to comprise a plurality of rubber members for a tire when a ribbon-shaped rubber strip (R) is spirally wound and laminated, and uses holding rolls () and two sets of stitching rolls (), () arranged in parallel with a center of a rubber strip width (W) therebetween to enable performing of an independent pressing motion, such that the rubber strip (R) is pressed and bonded by the holding rolls () in a position, in which the rubber strip (R) is wound, and the stitching roll () or () positioned fore in an advancing direction of traverse movement, out of the two sets, is caused to perform a pressing motion in a regional part just after the press whereby a fore part of the rubber strip in the advancing direction is pressed and bonded.

Tire building method and rubber strip bonding apparatus

Method for forming a rubber strip which enables a wider rubber of small thickness without lowering an extruding speed and enables to reduce a building cycle time, thereby increasing the efficiency of tire manufacturing. Temperatures at a main-part casing, a screw shaftand a head region included with the dieare controlled to be different from each other in a manner that: the temperature as controlled in the main-part casingis higher than that in the screw shaft; and the temperature as controlled in the head region is higher than that in the main-part casing, when continuously extruding a rubber material in a form of a ribbon in forming a rubber strip

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Osaka, Japan

Masami Tanabe