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US 2008/0047682 A1Published application
Filler component for investment casting slurries
AssigneeNalco Company
InventorsRonald Doles, David Viers
Life of this patent
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Abstract
A filler component for making an investment casting slurry, which comprises: a major portion of finely divided silica, aluminum silicate, alumina, zircon, or mixtures thereof; and a minor portion of one or more finely divided materials having particles in which, on average, at least one dimension of the particle is at least about four times greater than at least one other dimension of the particle. Typically, the particles are of generally plate-like or needle-like shape.
Claims15
A method of making an investment casting slurry comprising:
- mixing a filler component and a binder, wherein the filler component contains:
- a major portion which comprises at least one finely divided material selected from the group consisting of silica, aluminum silicate, alumina, and zircon;
- and
- a minor portion of one or more finely divided materials comprising particles having plate shaped, needle shaped, or tubular structure, in a concentration sufficient to reduce drainage time of a slurry containing said filler component after application to an investment casting pattern, when compared with a slurry without said minor portion.
1 more element
A method of making an investment casting slurry comprising:
- mixing a filler component and a binder, wherein the filler component contains:
- a major portion which comprises at least one finely divided material comprising particles selected from the group consisting of silica, aluminum silicate, alumina, and zircon, said particles having, on average, a generally similar extent in their three dimensions;
- and
- a minor portion of from 0.1 to 15 weight percent of one or more finely divided materials comprising particles in which, on average, at least one dimension of the particle is at least about four times greater than at least one other dimension of the particle.
1 more element
Dependencies are inferred from the claim text.