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US 10,252,326 B2Granted
Dual investment technique for solid mold casting of reticulated metal foams
AssigneeUnited Technologies Corporation
InventorsRyan B. Noraas, Steven J. Bullied, Mark F. Bartholomew
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Abstract
A method to manufacture reticulated metal foam via a dual investment solid mold, includes pre-investment of a precursor with a diluted pre-investment ceramic plaster then investing the encapsulated precursor with a ceramic plaster.
Claims9
A method to manufacture reticulated metal foam via a dual investment solid mold, comprising:
- pre-investing a precursor with a pre-investment ceramic plaster to encapsulate the precursor to form an encapsulated precursor, the precursor is a reticulated foam;
- and
- coating the precursor in a molten wax to increase ligament thickness to provide an about 90% air to 10% precursor ratio.
A method to manufacture reticulated metal foam via a dual investment solid mold, comprising:
- coating a precursor in a molten wax to increase ligament thickness;
- pre-investing the waxed precursor with a pre-investment ceramic plaster to encapsulate the precursor, wherein the pre-investment ceramic plaster comprises a ratio greater than a manufacturer recommended ratio of 39-42:100;
- and
- investing the encapsulated precursor with a ceramic plaster, wherein the ceramic plaster is more rigid than the pre-investment ceramic plaster.
1 more element
A dual investment solid mold, comprising:
- a precursor;
- a pre-investment ceramic plaster over the precursor, wherein the pre-investment ceramic plaster comprises a ratio greater than a manufacturer recommended ratio of 39-42:100;
- and
- a ceramic plaster over the pre-investment ceramic plaster, wherein the ceramic plaster is more rigid than the pre-investment ceramic plaster.
1 more element
Dependencies are inferred from the claim text.