| 摘要 |
An elastomeric composition is shaped into a conveyor belt and cured in three steps. In the first step the uncured composition is heated to the curing temperature of the elastomer and pressed at a pressure which is at least equal to the vapor pressure of volatile constituents in the composition to avoid bubbles but less than 6 kg/cm2 until the composition becomes plastic. At this point, the pressure is increased to about 6 to 10 kg/cm2 to shape the composition into the configuration of a conveyor belt while maintaining the temperature of the composition at the curing temperature of the elastomer. In a third step, the pressure is reduced to a pressure of not less than the vapor pressure of volatile constituents of the composition and less than 6 kg/cm2 while maintaining the temperature of the composition at the curing temperature of the elastomer until the elastomer is cured.
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