Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – With internal application of fluid pressure
Patent
1989-12-05
1992-09-29
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
With internal application of fluid pressure
264 85, 264315, 264326, 264501, 425 38, 425 42, 425 50, 425182, 4253871, B29C 3504, B29D 3000
Patent
active
051512424
ABSTRACT:
A method and an apparatus for vulcanizing an elastomer product, such as automobile tires, wherein the elastomer product is placed in a vulcanizing chamber in a mold steam at an elevated pressure is supplied to the vulcanizing chamber to heat and pressurize the elastomer product until the elastomer product reaches a prespecified temperature or for a prespecified period of time, the steam supply is stopped and a pressurizing gas, at a pressure not lower than the steam supply pressure, is supplied to the vulcanizing chamber until the end of a heating period, said steam being blown in and supplied from an upper position of the center of the vulcanizing chamber in a horizontal direction or in an inclined downward direction, said steam being blown in and supplied from a lower position of the center of the vulcanizing chamber toward an upper region of the vulcanizing chamber. The method and apparatus prevent a large temperature difference within the elastomer product and provide uniform vulcanizing product uniformity, shortening of the vulcanizing time, improvement of productivity, and reduction of energy loss.
REFERENCES:
patent: 2997740 (1961-08-01), Soderquist
patent: 3443280 (1969-05-01), Hugger
patent: 4752212 (1988-02-01), Singh
patent: 4846649 (1989-07-01), Hasegawa et al.
patent: 5020982 (1991-06-01), Kubota et al.
Hasegawa Akira
Ijiri Masaaki
Irie Nobuhiko
Katayama Hideaki
Kobayashi Michihito
Mitsubishi Jukogyo Kabushiki Kaisha
Silbaugh Jan H.
Sumitomo Rubber Industries Ltd.
Vargot Mathieu
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