Process Cold isostatic pressing - CIP
Cold isostatic pressing applies pressure from multiple directions for achieving greater uniformity of compaction (high-quality parts) and increased shape capability, compared to uniaxial pressing.

There are two methods of carrying out isostatic pressing.
In wet-bag isostatic pressing, powder is encased in a rubber sheath that is immersed in a liquid which transmits the pressure uniformly to the powder.

In dry-bag isostatic pressing, rather than immerse the tooling in a fluid, the tooling itself is built with internal channels into which high-pressure fluid is pumped.
Category Mass conserving processes, Powder technology
Materials Ceramics
Metal powders
Cermet
Competing processes Hot isostatic pressing - HIP
Other pressing methods
References Modern Ceramic Engineer
Additional info The wet-bag version has cycles of minutes or tens of minutes (much more than uniaxial pressing).

Tooling for the dry-bag version are costly and difficult to build, but once designed and automated the process provides 15-25 cycles/min.
Copyright © 1996, 97, 98 Torben Lenau