Mold with thermally insulating, protective coating
AssigneeSwiss Aluminium Ltd.
InventorsMarcus Textor, Tibor Kugler, Jean-Pierre Gabathuler
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Abstract
The mold features on its work face a thermally insulating protective layer of sub-micron metal oxide particles. The coating can be applied by spraying an aqueous sol of a metal oxide onto the mold work face which has been heated to at least 60.degree. C. The use of sub-micron sized metal oxide particles enables the formation of a protective coating of very low density and consequently very low thermal conductivity. The coating can furthermore be deposited very economically, and likewise removed again.
Claims17
A mold for casting metal wherein said mold has a work face and a thermally insulating protective coating on said work face, wherein said protective coating consists essentially of sub-micron ceramin metal oxide particles having a particle size of 5-50 nm.
Process for coating the work face of a mold with a thermally insulating protective coating which comprises:
- providing a mold having a work face, wetting the said work face with an aqueous sol containing essentially sub-micron ceramin metal oxide particles having a particle size of 5-50 nm, and subsequently substantially evaporating away the water phase.
Dependencies are inferred from the claim text.