| 摘要 |
<p>A tire mold, comprising a continuous counter-molding ring (13) for molding the smallest diameter bead, is new. A tire mold comprises (a) two shells (11, 12) for respectively molding the exterior surface of each of the side walls and the exterior portion of each of the beads up to an inner radial limit where the tire surface diameter is phi 0 (minimal diameter of the tire surface at the smallest diameter bead) and phi 2 (minimal diameter of the tire surface at the largest diameter bead), respectively; and (b) a continuous counter-molding ring (13) for molding the smallest diameter bead from the inner radial limit where the tire surface diameter is phi 0 up to an inner axial limit of diameter phi 1 which is smaller than phi 2 but larger than phi 0. An Independent claim is also included for a tire vulcanization press for receiving the above mold which has a split counter-molding ring (14), the press comprising (a) a lower support for receiving one of the shells; (b) a moving support for receiving the other shell; (c) a system for moving the supports towards and away from one another; (d) a lower membrane plate; (e) a system for producing relative motion between the lower membrane plate and the lower support; (f) receivers for the split counter-molding ring segments; and (g) a split counter-molding ring segment displacement mechanism which is actuated by movement of the lower plate relative to the lower support and which provides successive sequential movement of the segments in respective sequences to advance and retract the segments into and from the molding position.</p> |
