Method for molding powders
US5030401A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1990 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Jan 26, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F3/1275
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for molding powders to form a shaped compact comprising the steps of PA1 forming a thin-wall resilient mold having an outer surface and having at least one opening adjacent a surface of a model of a desired shape, forming a mold support on the outer surface of the thin-wall resilient mold, so that the mold support adheres to the outer surface of the thin-walled resilient mold, PA1 removing the model from the thin-wall resilient mold whereby a cavity is formed in a portion of the thin-wall resilient mold, from which the model is removed, filling up the cavity of the thin-wall resilient mold with a powder as a forming material through the opening, PA1 sealing the opening of the thin-wall resilient mold after having evacuated air from the inside of the thin-wall resilient mold, PA1 removing the mold support from the thin-wall resilient mold, PA1 subjecting the thin-wall resilient mold filled with the powder to a cold isostatic press. The mold support can be made by cast molding or by applying a material such as water-glass, a hydrolysis liquid of metal alkoxide, liquid polyurethane resin, liquid epoxy resin or liquid gypsum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.