Apparatus for high efficiency hot isostatic pressing

Details Apparatus for high efficiency hot isostatic pressing Apparatus for high efficiency hot isostatic pressing

1986-03-25

1988-07-12

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Means for molding powdered metal

419 49, 4254052, 432199, B22F 312

Patent

active

047566809

ABSTRACT:
A process for high efficiency hot isostatic pressing in a hot isostatic pressing treatment for sintering or densifying a ceramic or metallic workpiece in a high temperature and high pressure gas atmosphere, which includes preheating the workpiece outside a high pressure vessel prior to the hot isostatic pressing treatment, transferring the preheated workpiece as surrounded with the gas in a hot state into the high pressure vessel, then treating the workpiece at high temperature and high pressure in a gas atmosphere, thereafter taking out the workpiece from the high pressure vessel together with the gas atmosphere, then cooling the workpiece if necessary, and subsequently taking it out from the gas atmosphere, as well as an apparatus for practicing the above-noted process, wherein a treating chamber for effecting the hot isostatic pressing treatment is covered with a hermetic casing, and at least one valve mechanism capable of providing communication and cut-off between the interior and exterior of the treating chamber is provided in each of upper and lower portions of the treating chamber.

REFERENCES:
patent: 3606286 (1971-09-01), Lundstrom
patent: 4013394 (1977-03-01), Witkin et al.
patent: 4217087 (1980-08-01), Bowles
patent: 4349333 (1982-09-01), Bowles
patent: 4471949 (1984-09-01), Ishii
patent: 4478626 (1984-10-01), Moritoki et al.
patent: 4491302 (1985-01-01), Asari et al.
patent: 4537569 (1985-08-01), Asari et al.

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