The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2013
Filed:
Feb. 09, 2011
Robert Bruce Wagstaff, Greenacres, WA (US);
Aaron David Sinden, Valleyford, WA (US);
Todd F. Bischoff, Spokane Valley, WA (US);
Eric Ball, Spokane, WA (US);
Jeff Mcdermott, Liberty Lake, WA (US);
Robert Bruce Wagstaff, Greenacres, WA (US);
Aaron David Sinden, Valleyford, WA (US);
Todd F. Bischoff, Spokane Valley, WA (US);
Eric Ball, Spokane, WA (US);
Jeff McDermott, Liberty Lake, WA (US);
Novelis Inc., Toronto, Ontario, CA;
Abstract
An exemplary embodiment of the invention provides a method of direct chill casting a composite metal ingot. The method involves sequentially casting two or more metal layers to form a composite ingot by supplying streams of molten metal to two or more casting chambers within a casting mold of a direct chill casting apparatus. Inlet temperatures of one or more of the streams of molten metal are monitored at a position adjacent to an inlet of a casting chamber fed with the stream, and the inlet temperatures are compared with a predetermined set temperature for the stream to determine if there is any difference. A casting variable that affects molten metal temperatures entering or within the casting chambers (e.g. casting speed) is then adjusted by an amount based on the difference of the compared temperatures to eliminate adverse casting effects caused by the difference of the inlet temperature and the set temperature. Preferably an adjustment is selected that causes the monitored temperature to approach the set temperature. Another exemplary embodiment provides equipment for operation of the method.