Method and binder for use in powder molding
US5332537A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1992 |
| Grant date | Jul 26, 1994 |
| Priority date | — |
| Expiry date | Dec 17, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28B17/026
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An improved binder is mixed with powder to form feedstock for molding. The binder includes a first component which is soluble in water and a second component which is insoluble in water. The two binder components are miscible with each other in a liquid state. The two binder components form a uniform heterogeneous mixture when mixed in a liquid state. The binder is mixed with a suitable powder to form the feedstock. The feedstock is molded to form a compact. Polymer units of the binder are cross linked after the compact has been formed. The cross linking of the polymer units of a component of the binder is accomplished by exposing the compact to ultraviolet radiation or by the use of a catalyst. The compact is partially debound by exposing the compact to water, that is, to a water based solvent. Thereafter, the compact is further debound to remove the component which is insoluble in water. The powder is then sintered to form an article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.