A bead core of the present disclosure is an annular bead core configured in a state where one or more bead wires are wound a plurality of times, a cross-sectional shape of the bead wire is non-circular, in axial cross-sectional view of the bead core, the bead wire is formed in a plurality of columns in an axial direction of the bead core and a plurality of stacks in a radial direction of the bead core, and in the axial cross-sectional view of the bead core, the bead wire has a periphery coated with a resin material, and the resin material is interposed between the bead wires. A manufacturing method of the bead core of the present disclosure is a manufacturing method to obtain the above bead core, comprising: a winding step of winding a plurality of times one or more resin-coated wires each comprising a bead wire having a non-circular cross-sectional shape and being coated with a resin material so that a plurality of columns in an axial direction and a plurality of stacks in a radial direction are formed in axial cross-sectional view of the obtainable bead core, and a joining step of joining the resin materials of the adjacently wound resin-coated wires to each other. A pneumatic tire of the present disclosure comprises a pair of bead portions, and the above bead core in each of the pair of bead portions.
BEAD CORE, PRODUCTION METHOD THEREFOR, AND PNEUMATIC TIRE
WULSTKERN, HERSTELLUNGSVERFAHREN DAFÜR UND LUFTREIFEN
TRINGLE, PROCÉDÉ DE PRODUCTION ASSOCIÉ, ET PNEU
2021-04-21
Patent
Elektronische Ressource
Englisch
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