Method for making ceramic casting slurries
AssigneeUnited Technologies Corporation
InventorsCarlton E. Cruff, Edward G. Day
Life of this patent
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Abstract
The present invention provides an improved method for making ceramic slurries useful in forming casting molds. The method involves placing the slurry ingredients in a mixing container, removing sufficient air from the container to prevent subsequent air entrapment, mixing the slurry ingredients by epicyclic agitation to effect rapid particle wetting and homogenization and removing the slurry from the container after agitation is terminated, the ceramic slurry being ready for immediate use. Total slurry preparation time is generally one hour or less, as compared to the 24 to 36 or more hours required for prior art slurry preparation techniques.
Claims9
A method for rapidly preparing a ceramic slurry having controlled viscosity, density and the like for use in forming casting molds, wherein a liquid binder ingredient and insoluble ceramic particulate ingredients of various particle sizes are mixed in a container, comprising the steps of:
- placing the slurry ingredients in the container in the desired amounts, including removing sufficient air from the container to prevent subsequent air entrapment in the slurry ingredients;
- mixing the slurry ingredients by epicyclic agitation to effect rapid wetting and homogenization thereof, substantial air entrapment in the ingredients being prevented during mixing by said prior removal of air from the container;
- and
- terminating said agitation and removing the ceramic slurry from the container for immediate use in forming casting molds, total slurry preparation time, including placement of the ingredients in the container and epicyclic mixing, being archievable within one hour.
Dependencies are inferred from the claim text.