Metal founding – Process – Shaping a forming surface
Reexamination Certificate
2006-02-21
2006-02-21
Lin, Kuang Y. (Department: 1725)
Metal founding
Process
Shaping a forming surface
C164S527000
Reexamination Certificate
active
07000680
ABSTRACT:
A casting mold which is molded by heating mulled sand including a mixture of refractory molding sand particles, an inorganic water soluble binder and water, wherein the inorganic water soluble binder is made of a combination of a sulfate compound such as magnesium sulfate heptahydrate and a borate compound such as sodium tetraborate decahydrate. The casting mold is formed by baking the mulled sand in such a manner that at least part of the sulfate compound retains water of crystallization therein and the borate compound is once fused and then cured.
REFERENCES:
patent: 2004/0050524 (2004-03-01), Grassi et al.
patent: 53-119724 (1978-10-01), None
patent: 11-285777 (1999-10-01), None
Hori Yuji
Kurokawa Yutaka
Kusunoki Hiroaki
Miura Naohiro
Nishi Shoichi
Brooks & Kushman P.C.
Lin Kuang Y.
Tsuchiyoshi Industry Co., Ltd.
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