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    • 7. 发明授权
    • Method for molding bead portion of green tire and bead portion molding device
    • 成型轮胎胎圈部分和胎圈部分成型装置的方法
    • US07491285B2
    • 2009-02-17
    • US11232887
    • 2005-09-23
    • Yuichi TakeuchiNaoki Sugiyama
    • Yuichi TakeuchiNaoki Sugiyama
    • B29D30/24B29D30/32
    • B29D30/32B29D30/244B29D2030/3264
    • The method for molding a bead portion for a green tire includes a bead core supporting step for supporting the bead core through a carcass ply upon expanding a diameter of a bead core supporter including a seating surface for supporting a radially inner surface of the bead core. Since the bead core supporter comprises an outer piece outside of the seating surface in a tire axial direction that rises up towards outside in the radial direction with a clearance between the same and the bead core, that is larger than the thickness of the carcass ply, it is possible to flip a carcass outer region up, that is outside in the tire axial direction than a sandwiched region of the carcass ply, sandwiched and held between the seating surface and the bead core, and to deform the carcass outer region into an outer inclined piece that is inclined and extended towards radially outside without including any partially bent portions. It further includes a curving step of pressing the outer inclined piece inward in the tire axial direction by using a ply winding ring for curving the same towards the outside surface and the radially outer surface of the bead core, and a pressing step of pressing a tip end portion of the curved outer inclined piece towards the radially outer surface of the bead core by using a pressing roller.
    • 用于模制生胎的胎圈部分的方法包括胎圈芯支撑步骤,用于在扩大包括用于支撑胎圈芯的径向内表面的就座表面的胎圈芯支撑件的直径的情况下,通过胎体帘布层支撑胎圈芯。 由于胎圈芯支撑件在轮胎轴向方向上包括在座表面外侧的外部件,该轮胎轴向方向上在径向方向上以其间隙和胎圈芯之间的间隙大于胎体帘布层的厚度, 可以将胎体外部区域向上方翻转,该胎体外部区域在轮胎轴向外侧比胎体帘布层的夹持区域夹持并保持在座面和胎圈芯之间,并且使胎体外部区域变形为外部 倾斜的部件倾斜并且朝向径向外侧延伸而不包括任何部分弯曲的部分。 还包括通过使用用于使外侧倾斜片向胎圈芯的外表面和径向外表面弯曲的层叠卷绕环将轮胎轴向内侧按压外倾斜片的弯曲步骤,以及按压步骤 弯曲外倾斜片的端部通过使用加压辊朝向胎圈芯的径向外表面。