Hot isostatic pressing apparatus

Details Hot isostatic pressing apparatus Hot isostatic pressing apparatus

1984-08-09

1986-12-16

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Means to create a vacuum or apply fluid pressure within a...

266252, 419 49, 425DIG26, B22F 312

Patent

active

046294120

ABSTRACT:
A hot isostatic pressing apparatus having a high pressure vessel, a heat insulating layer and a heater disposed inside the heat insulating layer, the heat insulating layer and the heater being disposed within a high pressure chamber defined by upper and lower covers. The heat insulating layer is composed of at least two inner and outer inverted cup-like casings, the outer casing being metallic and having a hermetic structure and the inner casing having a hermetic structure. A passage is formed in the upper surface of the outer casing and a valve capable of being opened and closed is provided therein. Further, a mechanism for opening and closing the valve is mounted on the upper cover, and a gas passage is formed in the lower portion of the het insulating layer. The above arrangement creates a convection of gas in the cooling step after the HIP treatment whereby a remarkable improvement can be attained in cooling efficiency, cooling time and productivity.

REFERENCES:
patent: 3571850 (1971-03-01), Pohto
patent: 4013394 (1977-03-01), Witkin et al.
patent: 4022446 (1977-05-01), Smith, Jr. et al.
patent: 4151400 (1979-04-01), Smith, Jr. et al.
patent: 4217087 (1980-08-01), Bowles
patent: 4235592 (1980-11-01), Smith, Jr. et al.
patent: 4247755 (1981-01-01), Smith, Jr. et al.
patent: 4471949 (1984-09-01), Ishii
patent: 4491302 (1985-01-01), Asari et al.

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