Investment casting shells and compositions including rice...

Details Investment casting shells and compositions including rice... Investment casting shells and compositions including rice...

2006-02-28

2006-02-28

Lin, Kuang Y. (Department: 1725)

Metal founding

Process

Shaping a forming surface

C164S361000

Reexamination Certificate

active

07004230

ABSTRACT:
Incorporation of rice hull ash into investment casting shell molds improves the permeability, shell build thickness, and/or shell build uniformity of the molds. A method to make the molds entails mixing refractory filler, rice hull ash, and preferably a fiber to form a dry blend; mixing the dry blend with a binder sol to form a refractory slurry, and employing the refractory slurry to produce an investment casting shell mold.

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