Metal founding – Process – Shaping liquid metal against a forming surface
Reexamination Certificate
2007-09-25
2007-09-25
Ryan, Patrick Joseph (Department: 1725)
Metal founding
Process
Shaping liquid metal against a forming surface
C164S268000, C164S072000, C508S154000, C106S038240
Reexamination Certificate
active
10974384
ABSTRACT:
In a lubricant composition suitable for use in the manufacture of aluminum alloys comprising lubricant base selected from the group consisting of solid lubricants, liquid lubricants, grease lubricants, emulsion lubricants, and dispersion lubricants, the improvement wherein the lubricant composition further comprises: an effective amount of water and surfactant. It is believed that mixing oil with water and surfactant provides a method for uniformly distributing the surface oxide at the meniscus for casting applications. Uniform distribution of the oxide at the meniscus reduces vertical fold formation that can lead to cracks in the aluminum ingot. In addition, the mixture promotes uniform heat transfer around the mold. Uniform heat transfer around the mold allows the solidifying aluminum alloy to stay in contact with the mold longer and form stronger ingot shells. A process for continuous or semi-continuous casting of aluminum alloys via the use of this lubricant composition is also disclosed.
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Anglin James R.
Hart Jim N.
Kasun Thomas J.
Reynolds Brian C.
Richter Ray T.
Alcoa Inc.
Greenberg & Traurig, LLP
Ryan Patrick Joseph
Sankus Mauri A.
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