Patent Number: 6,250,907

Title: Device for hot-isostatic pressing of parts

Abstract: A method of treating parts (34) in a treatment chamber (33) by hot-isostatic pressing with an inert gas as pressure medium and in the presence of a purifying agent (25a) for the inert gas comprises the steps of reducing the pressure in the treatment chamber (33), increasing the pressure again by introducing the inert gas, increasing the temperature in the treatment chamber (33) by activating heating elements (9a), and, after a certain holding time, reducing the pressure and the temperature again. Especially if the purifying agent (25a) is of the same material as the parts (34) being treated, the purifying effect of the purifying agent becomes insufficient. The effect of the purifying agent (25a) is improved according to the invention by bringing the inert gas, at least when being introduced, to circulate such that it is heated, passes through the purifying agent and is thereafter cooled before contacting the parts. The invention also relates to a device for carrying out the method.

Inventors: Bergman; Carl (Vaster.ang.s, SE)

Assignee: Flow Holdings GmbH (SAGL), LLC

International Classification: B22F 3/15 (20060101); B22F 3/14 (20060101); B29C 043/10 (); B22F 003/15 ()

Expiration Date: 06/26/2018