MANUFACTURING METHOD AND EQUIPMENT FOR PNEUMATIC TIRES

• Main Author: KOIKE MASARU
• Format: Patent
• Language: English; Japanese
• Published: 01.11.2021
• 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 prevent air from accumulating near the inner end of the chafer between the inner liner and the carcass plies.SOLUTION: The inner liner 2, both side chafer 3, and carcass plies 4 are wrapped sequentially around the forming drum 10, and the carcass plies 4 are pressed from the outer side by the first roller 31, which is wider than the inner edge in the width direction of both side chafer 3 and narrower than the outer edge in the width direction of both sides of the carcass plies 4. The carcass ply 4 is pressed from the outer side by the second roller 41, which is formed narrower than the inner width direction end of the carcass ply 3, while the second roller 41 is moved from the inside in the width direction of the inner width direction end of the chafer 3 to the outside in width direction of the outer width direction end 4a of the carcass ply 4. The first roller 31 is formed with a lower hardness than the second roller 41.SELECTED DRAWING: Figure 1 【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を成形ドラム１０に順次巻き付け、両側のチェーファ３の幅方向内端部より幅広且つカーカスプライ４の両側の幅方向外端部より幅狭に形成された第１ローラ３１によりカーカスプライ４を外面側から押圧し、両側のチェーファ３の幅方向内端部より幅狭に形成された第２ローラ４１によりカーカスプライ４を外面側から押圧しつつ第２ローラ４１をチェーファ３の幅方向内端部より幅方向内側からカーカスプライ４の幅方向外端部４ａより幅方向外側に移動させる。第１ローラ３１は、第２ローラ４１より硬度が低く形成される。【選択図】図１