MANUFACTURING METHOD AND MANUFACTURING DEVICE OF PNEUMATIC TIRE

• Main Author: KOIKE MASARU
• Format: Patent
• Language: English; Japanese
• Published: 16.02.2022
• Subjects: PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To inhibit air from accumulating near an inner end part of a chafer between an inner liner and a carcass ply and produce a pneumatic tire with good productivity.SOLUTION: An inner liner 2, chafers 3 at both sides, and a carcass ply 4 are sequentially wound around a molding drum 10. The molding drum 10 is moved from the center side as seen in a width direction to an outer end part as seen in the width direction of the carcass ply 4 while rotating with the carcass ply 4 pressed from the outer surface side by a roller 31. A feed pitch of the roller 31 is set to be small in a predetermined range in the width direction of the carcass ply 4, which includes an inner end part 3a of the chafer 3, compared to the center side as seen in the width direction and the outer end part side as seen in the width direction of the carcass ply 4.SELECTED DRAWING: Figure 5 【課題】インナーライナとカーカスプライとの間においてチェーファの内端部近傍にエアが溜まることを抑制しつつ生産性良く製造する。【解決手段】インナーライナ２、両側のチェーファ３及びカーカスプライ４を成型ドラム１０に順次巻き付け、ローラ３１によりカーカスプライ４を外面側から押圧しつつカーカスプライ４の幅方向中央側から幅方向外端部まで成型ドラム１０を回転させながら移動させる。ローラ３１の送りピッチを、カーカスプライ４の幅方向中央側と幅方向外端部側とに比して、チェーファ３の内端部３ａを含むカーカスプライ４の幅方向所定範囲において小さくする。【選択図】図５