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:
Dec. 02, 2014
Filed:
Aug. 30, 2010
Seetarama S. Kotagiri, Rochester Hills, MI (US);
Timothy W. Skszek, Saline, MI (US);
Frank A. Horton, Rochester Hills, MI (US);
Gregory P. Kiselis, Oak Ridge, NC (US);
Seetarama S. Kotagiri, Rochester Hills, MI (US);
Timothy W. Skszek, Saline, MI (US);
Frank A. Horton, Rochester Hills, MI (US);
Gregory P. Kiselis, Oak Ridge, NC (US);
Magna International Inc., Aurora, Ontario, CA;
Abstract
A method of forming metal castings, including positioning a first end of a structural member in a first mold cavity and a second end of the structural member in a second mold cavity. The first and second mold cavities being fluidly coupled to a reservoir of molten metal. Applying a main pressure to the molten metal in the reservoir to force the molten metal into the first mold cavity and the second mold cavity. Then, applying a first auxiliary pressure to the first mold cavity and a second auxiliary pressure to the second mold cavity to densify the casting formed in the first mold cavity and the second mold cavity. Also, a method for casting including maintaining a main pressure at or less than an initial, mold-filling pressure after first and second mold cavities have been filled. Additionally, a method for detecting whether a first mold cavity is sufficiently filled with molten metal by monitoring a moveable element.