Carbon fiber-reinforced gypsum models and forming molds

Details Carbon fiber-reinforced gypsum models and forming molds Carbon fiber-reinforced gypsum models and forming molds

1984-04-19

1985-11-12

Flint, Jr., J. Howard

Static molds

Container-type molding device

Of named component

425 84, 425175, 264337, B28B 126, B29C 500

Patent

active

045523290

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.

REFERENCES:
patent: 2303303 (1942-11-01), Schleicher
patent: 2988456 (1961-06-01), Fairbanks et al.
patent: 3295818 (1967-01-01), Kreier
patent: 3317178 (1967-05-01), Kreier
patent: 3460606 (1969-08-01), Boddey
patent: 3641229 (1972-02-01), Lawrence
patent: 4307867 (1981-12-01), Shannon
patent: 4316864 (1982-02-01), Bramwell

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