Patent ID: 7011510

Claim:
A hot isostatic pressing apparatus comprising: a high-pressure vessel; a heater provided within said high-pressure vessel; a bottomed cylindrical casing being provided within the high-pressure vessel, said bottomed cylindrical casing comprising a treatment chamber for treating workpieces to be treated formed in the inner part, and being capable of housing said heater; a bottomed cylindrical heat insulating structure provided within said high-pressure vessel, said heat insulating structure being provided on the outside of said casing so as to cover said casing; a gas flow regulating valve provided for regulating the gas flow surrounding said casing; a heat sink having a water cooling mechanism, said heat sink being provided in the space defined by said heat insulating structure and the inner surface of said high-pressure vessel; and a pressure medium gas stirring fan, said fan being arranged within said casing to promote the temperature uniformity of the treatment chamber space for housing workpieces; and a circulating flow promoting fan positioned for controlling the convection of gas in the space defined by the inner surface of said heat sink and the outer surface of said heat insulating structure to improve the cooling rate.