| 摘要 |
PROBLEM TO BE SOLVED: To reduce the development of non-conforming articles by a method wherein a rubber material is vulcanized after being pre-formed by independently controlling the temperature and pressure of the rubber material controlled at a certain temperature with heating liquid. SOLUTION: In the forming work of rubber, its pre-forming is performed under the temperature, which is lower than its vulcanizing temperature, and pressure and, after that, thermally vulcanized. Steam drain 2 is received by a hot water tank 3 and sent with a pump 4 to the bag rubber 15 and the jacket 16 of a forming vulcanizing device. The pressure of the hot water is controlled with a pressure controlling device while its temperature is controlled with the automatic temperature controlling device of the electric heater of a hot water heater 5. At vulcanizing, the drain in the bag rubber 15 and the jacket 16 is pushed out by steam 18 and displaced by the steam 18. At the same time, the steam 18 is put inside a mold 14 for vulcanization. At a timer 9, the steam drain 2 discharged from a factory is employed under the condition 10 that the mold is wound with canvas, cord and stock rubber for preventing the stock rubber from being influenced by the temperature change among seasons so as to heat with finned heating tubes 11 provided on the wall surface of the timer 9 in order to control the temperature of the rubber through pre-heating for holding a certain temperature. |
