Method of obtaining a mould intended for the manufacture of very small parts
US4923672A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1988 |
| Grant date | May 8, 1990 |
| Priority date | — |
| Expiry date | Dec 14, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The mould of this invention is intended for the manufacture of small dimensioned parts, in particular those dimensioned on the order of 0.1 mm or less. It comprises one or several mould shells each of which is obtained by: PA1 machining a matrix (100) from a hard material of which at least a portion (104) will have the form of a negative of the desired shell, such portion having dimensions slightly greater than those of the shell to be finally obtained; PA1 positioning the matrix within a cavity (106) and obtaining a blank of the shell (116) by injecting a mixture composed of a metallic powder and a binding agent into the cavity; PA1 eliminating the binding agent by heating the blank and thereafter subjecting said blank to a sintering operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.