Method for producing carbon fiber-reinforced gypsum models and forming molds
US4990292A · kind A · utility
15Cited by
11References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jul 25, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B20/0048
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing improved gypsum models and molds of high duplication accuracy is provided. In the process, bundles of carbon fibers of specified length and amount having a sizing agent deposited thereon are treated to remove the sizing agent from the carbon fibers which are then separated into single fibers in water. A major part of hemihydrate gypsum (CaSO.sub.4.1/2H.sub.2 O) powder is then added to the carbon fibers dispersed in water to obtain a gypsum slurry having the carbon fibers uniformly dispersed therein. The slurry is then cast to obtain the models or molds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.