Emissive coatings for investment casting molds

Details Emissive coatings for investment casting molds Emissive coatings for investment casting molds

1993-10-04

1995-02-21

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

523139, 523140, 523141, 524432, 524433, 524437, 524441, 524436, 524494, 501 32, 106 389, 164 24, 164516, 164517, 164518, 164519, C08J 706, C08K 318, C08K 322, C08L 2100

Patent

active

053916069

ABSTRACT:
Emissive compositions are described that can be applied as a coating to the surface of an investment casting mold to increase or decrease the rate of cooling of a casting within the mold. A coating that decreases the rate of cooling of an investment casting within an investment casting mold may comprise a compound having an emissivity less than the emissivity of the mold; a high temperature glass-forming material and a solvent to make a slurry. Similarly, a coating that increases the rate of cooling may comprise a compound having an emissivity greater than the emissivity of the mold; a low temperature glass-forming material and a solvent to make a slurry. Also disclosed in a method of investment casting wherein an emissive composition is applied to the investment casting mold.

REFERENCES:
patent: 3993844 (1976-11-01), Kiger et al.
patent: 4966225 (1990-10-01), Johnson et al.
patent: 4977024 (1990-12-01), Morita et al.

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