Metal founding – Means to shape metallic material – Including means to heat mold
Reexamination Certificate
2007-06-05
2007-06-05
Tran, Len (Department: 1725)
Metal founding
Means to shape metallic material
Including means to heat mold
C164S122000, C164S122200
Reexamination Certificate
active
10929692
ABSTRACT:
An apparatus for manufacturing a directionally solidified columnar grained article with a reduced amount of secondary misorientation of the columnar grains. The apparatus includes a casting assembly comprising a mold with a cavity, a selector section at a lower end of the mold, a heating chamber and a cooling chamber. The mold is fed with a liquid metal and then moved from the heating chamber to the cooling chamber where the columnar grained article is solidified. The article is solidified with at least two dendrites (or grains) emerging from the selector section and entering the main cavity of the shell mold. Further, the selector section is configured so that no dendrite or grain grows from the bottom of the selector section into the shell mold cavity along a continuous path of purely vertical growth.
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ALSTOM
Buchanan & Ingersoll & Rooney PC
Tran Len
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