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US 11,833,579 B2Granted
Casting slurry
AssigneeSafran
InventorWen Zhang
Life of this patent
Estimating the term…
Abstract
A casting slurry for the manufacture of shell molds, including powder particles and a binder, further including a surfactant. Use of such a casting slurry for the manufacture of a shell mold.
Claims9
A casting slurry for manufacturing shell molds, comprising:
- powder particles including at least one of alumina, mullite, zircon, zirconia, mullite-zirconia composites, an alumino-silicate-based material and mixtures thereof, a mass content of the powder particles in the casting slurry being between 60% and 80%;
- a binder selected from ethyl silicate, sodium silicate or colloids, a mass content of the binder in the casting slurry being between 19.8% and 39.8%;
- and Tiron C6H4Na2O8S2 as a surfactant, wherein a mass content of said surfactant in the casting slurry is less than 0.05%, wherein a sum of the mass content of the powder particles and the mass content of the binder is greater than 99% and less than 99.9%, and wherein the casting slurry is configured to retain a sand coating on a pattern.
Dependencies are inferred from the claim text.