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:
Jul. 13, 1993
Filed:
Oct. 12, 1990
Makoto Fukuhira, Mouka, JP;
Kimio Kubo, Mouka, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
The designing of a cavity shape of a mold by utilizing solidification analysis is conducted by (a) preparing a two-dimensional small element model of a casting to be produced in the cavity, the casting including an article portion and a portion connected thereto for feeding a melt to the article portion; (b) determining a solid fraction distribution of the model by conducting the unsteady heat transfer calculation by a heat flux method; (c) correcting the solid fraction distribution by taking into account the heat transfer in a direction perpendicular to the two-dimensional model; (d) observing whether or not there is a closed loop of the solid fraction in the article portion; and (e) modifying the cavity shape to eliminate a closed loop of the solid fraction, if any, from the article portion.