Tire
AssigneeBridgestone Corporation
InventorsYoshihide Kouno, Seiji Kon, Keiichi Hasegawa
Life of this patent
Estimating the term…
Abstract
A tire includes: a tire frame member formed in a ring shape from a frame resin material, and including a pair of bead sections, a pair of side sections, and a crown section; a ring shaped bead core that is embedded in and joined to each of the bead sections, and that is formed by a single strand, or plurality of strands, of bead cord extending in the tire circumferential direction, and covered with, and joined to, a covering resin material; and an extension portion that extends from each of the bead cores in a direction that intersects with the tire circumferential direction when viewed from a tire side face, and that is joined to the tire frame member.
Claims19
A method of manufacturing a tire, the method comprising:
- injection molding a tire frame member formed in a ring shape from a frame resin material, the tire frame member including a pair of bead sections disposed separated from each other along the tire width direction, a pair of side sections that extend from the pair of bead sections toward the tire radial direction outside, and a crown section that connects together the pair of side sections;
- forming a ring shaped bead core that is embedded in and joined to each of the bead sections by welding, the bead core being formed by a single strand, or plurality of strands, of bead cord extending in the tire circumferential direction, and covered with, and joined to, a covering resin material exhibiting thermo-plasticity;
- and
- forming an extension portion that extends from each of the bead cores in a direction that intersects with the tire circumferential direction when viewed from a tire side face, the extension portion formed as a result of melting and flowing the covering resin material together with the tire frame member, the extension portion being joined to the tire frame member by welding.
A method of manufacturing a tire, the method comprising:
- forming a ring shaped bead core by a single strand, or plurality of strands, of bead cord extending in a tire circumferential direction, the bead cord covered with and joined to a covering resin exhibiting thermo-plasticity;
- placing the bead core in a mold;
- and
- injection molding a tire frame member formed in a ring shape, the tire frame member including a bead section, a side section that extends from the bead section toward a tire radial direction outside, and a crown section connected to the side section, the injection molding comprising:
- pouring a frame resin, in a molten state, into the mold through a gate, wherein the frame resin passes through the gate and around the bead core, wherein a surface of the covering resin of the bead core is melted and flows together with the frame resin;
- and
- solidifying the frame resin and the covering resin, wherein an extension portion is formed that extends from the bead core in a direction that intersects with the tire circumferential direction when viewed from a tire side face, the extension portion formed of the covering resin.
Dependencies are inferred from the claim text.