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. 31, 1991
Filed:
Jan. 29, 1991
Keiichiro Noguchi, Higashihiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A casting is formed, by compression casting, in a mold having a casting cavity which is formed by at least an outer mold die and a sand core. After feeding a molten metal into the casting cavity through a pouring gate, a compressive pressure, maintained at a lower extreme of approximately 2.5 atmospheres, is applied to the molten metal through the pouring gate in an early stage of solidification of the molten metal. The compressive pressure is varied, either gradually or quickly, to an upper extreme of approximately 10 atmospheres as the solidifcation of the molten metal progresses past an early stage of solidification, and is at this time applied to the solidifying molten metal through the sand core.