| 摘要 |
<p>The reinforcement for the bead of e.g. a pneumatic tyre, a rolling lobe diaphragm or an air spring is constructed by winding onto a mandrel or former alternate layers of naked wire (13) and flat, uncured rubber strip (12). Rubber (12A) is wound on before wire winding commences and continues after wire winding stops, so that the assembly exposes no cut wire end. After the winding operation the assembly is subjected to heat and pressure so that all the wire is embedded in and surrounded by an integrated, vulcanised rubber body. The rubber layers may be parallel with and on opposite sides of the layers of spaced wire windings or, as shown, a given rubber winding such as (12C) may have wire windings (13A, 13B) and (13C, 13D) on its radially opposite sides. The windings, both of rubber and wire, may be discrete loops or may be made by helically winding a single rubber strip or wire. The shape of the assembly as well as the volume of rubber at any position therein may be controlled by varying the tension under which the rubber strip and/or the wire is wound.</p> |
