Isostatic processing with shrouded melt-away mandrel
US5066454A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Jun 20, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/251
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A melt-away mandrel is disclosed for use in an isostatic pressing process and a flexible sleeve is disclosed for use with the melt-away mandrel. The mandrel is used during pressing of compactible material and then the mandrel is melted away leaving the compacted part. Preferably the sleeve covers the mandrel and this assembly is loaded along with a material charge in a cold isostatic pressing apparatus. The sleeve protects the powder charge from contamination from the material of the mandrel. The isostatic pressing process for forming an uncontaminated part includes assembling the melt-away mandrel in the flexible sleeve, placing the sleeve and mandrel assembly in a containment vessel with the material charge, and submitting the material charge and sleeve and mandrel assembly to pressure for compacting the material charge against the sleeve. After the mandrel is melted, the sleeve is peeled away from the pressed material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.