Carbon fiber-reinforced gypsum models and forming molds
US4552329A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1984 |
| Grant date | Nov 12, 1985 |
| Priority date | — |
| Expiry date | Apr 19, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B20/0048
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Gypsum models and molds made of a gypsum structure uniformly dispersing therein carbon fibers having a predetermined length in a defined range of amount are described. The molds include various types of molds such as original mold, basic mold, forming mold and the like. A method for manufacturing these molds is also described in which sizing agents deposited on carbon fibers are decomposed and removed by heating or dissolution in solvent, separating the carbon fibers into single fibers in water, adding a major part of gypsum powder to the carbon fiber dispersed water to obtain a gypsum slurry dispersing uniformly those single fibers, and casting the slurry in a case mold to obtain forming molds. A method for manufacturing white wares is also described in which a pottery or porcelain slip is casted into the gypsum forming molds, removing the resulting green product from the mold after hardening and drying the green products. Gypsum powder materials comprising carbon fibers and a method for making the same are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.