Method of making investment casting mold
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United States of America Patent
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Mar 23, 2021
Grant Date -
Aug 1, 2019
app pub date -
Oct 6, 2017
filing date -
Oct 10, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
Various embodiments of making an investment casting mold are disclosed. The method includes coating a sacrificial pattern with a prime layer that includes a first refractory slurry and a first refractory stucco; at least partially hardening the prime layer; and coating the prime layer with an intermediate layer that includes a second refractory slurry and a second refractory stucco. The method further includes at least partially hardening the intermediate layer; coating the intermediate layer with a first backup layer that includes a first thixotropic agent, the first thixotropic agent including a first polymer emulsion; coating the first backup layer with a second backup layer that includes a second thixotropic agent, the second thixotropic agent including a second polymer emulsion; and at least partially hardening the first backup layer and the second backup layer.
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