| 摘要 |
<p>PURPOSE:To efficiently prevent separation of the bead part of a tyre, and render preliminary treatment process prior to the application of a bead filler unnecessary, and thus improve the work efficiency by forming a cover of thin wall thickness, as an adhesive layer, of the flexible rubber of a natural rubber. CONSTITUTION:A cover 2 of thin wall thickness is provided respectively on a surface 1a adjacent to the bead wire of main body 1 of a bead filler and a surface 1b adjacent to the folded part of a carcass ply. Herein, the main part 1 is formed with resin blended flexible rubber and the cover 2 of thin wall thickness is formed with flexible rubber of natural rubber employing itself as an adhesive layer. The main body 1 and the cover 2 of thin wall thickness are simultaneously extrusion-molded by the use of, for example, a dual tuber, thereby integrating the cover 2 of thin wall thickness to respective surface 1a adjacent to the bead wire of the main body 1 and surface 1b adjacent to the folded part of the carcass ply and, therefore, the work efficiency can greatly be improved in comparison with the case wherein the cover 2 of thin wall thickness mold prepared separately is adhered.</p> |
