| 摘要 |
<p>High temperature and high pressure are applied, in an initial stage of core vulcanization, to a rubber material forming a raw tire to firmly join the interface of a rubber layer. A vulcanization device comprises a tread forming die (2) for defining the outer surface shape of a tire (10), upper and lower side dies (3, 4), and an inner die (5) for defining the inner surface shape of the tire (10). The raw tire (10) is molded and vulcanized in a cavity defined by the dies (2-4) and the inner die (5). The inner die (5) is provided, on the outer surface thereof, with a stretchable thin film (14) of an elastic body, and the raw tire (10) is expanded by heating and pressurized at the time of vulcanization by using noncompressive heating/pressurizing fluid that is fed between the outer surface (5) of the inner die (5) and the thin film (14).</p> |
