Patent ID: 7261855
Filing Date: 2007-08-28
Classification: B22F

Abstract:
1. A method for manufacturing complex shape parts with cavities from powder metal materials by Hot Isostatic Pressing (HIP), the method comprising: a) providing a shaping tool including a capsule having internal shape and dimensions corresponding to desired shape and dimensions of a complex shape part; b) providing hollow inserts having cavities corresponding to desired shape and dimensions of said cavities of said complex shape parts, and including a vent tube capable of controlling pressure inside said inserts; c) assembling the capsule and the inserts and filling the capsule with powder; d) performing an HIP step on the powder at a temperature below a final HIP temperature for the powder material while the cavities of the inserts are isolated from the HIP atmosphere and so that the pressure on the outer surface of the inserts exceeds the HIP pressure; e) connecting the cavity of the inserts to the HIP atmosphere through the vent tube; f) performing an HIP step on the powder at a final HIP temperature and pressure by injecting HIP gas media through the vent tube and into the cavity of the inserts; g) removing the capsule and the inserts.