| 摘要 |
PURPOSE: A process of forming hollow bodies by vulcanizing at 100 to 170°C and at a pressure of 3 to 6 bar and hollow bodies obtained therefrom are provided which can produce various products in the same system at low costs. CONSTITUTION: In the inside of heated molds, hollow bodies are formed by vulcanization, which bodies are made up by elements from natural or synthetic rubber and/or treated elastomers, possibly associated with different materials such as leather, skin, cotton, metals, expanded rubbers and other ones, combined with each other. A pressurized fluid, such as hot or cold air, vapor or compatible gas, is injected between the hollow bodies being formed. During vulcanization, the components, airtight-coupled with each other along at least a contact and sealing common line, are pushed and kept in forming adhesion against the mold surfaces by the pressurized fluid.
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