Metal founding – Process – Shaping a forming surface
Reexamination Certificate
2006-01-31
2006-01-31
Lin, Kuang Y. (Department: 1725)
Metal founding
Process
Shaping a forming surface
C164S361000
Reexamination Certificate
active
06991022
ABSTRACT:
The invention relates to investment casting shell molds and their method of manufacture. The method entails mixing fiber such as ceramic refractory fiber and organic fiber with ceramic filler to form a dry blend. The dry blend is mixed with a binder sol such as colloidal silica sol to form slurry. An expendable preform is dipped into the slurry, stuccoed and dried. This step is repeated until a ceramic shell of a desired thickness is formed over the expendable preform. The expendable preform then is removed, and the green ceramic shell is fired. Molten metal then may be poured into the shell to form a metal casting.
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Branscomb Thomas M.
Buntrock Kermit A.
Davis Arlen G.
Vandermeer John
Buntrock Industries, Inc
Law Offices of John A. Parrish
Lin Kuang Y.
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