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:
Mar. 05, 2002
Filed:
May. 10, 2000
Sumitomo Special Metals Co., Ltd., Osaka, JP;
Abstract
A rare-earth alloy powder pressing apparatus comprises a die. The die includes a die main body. The die main body includes a through hole for formation of a cavity, and an auxiliary yoke. A rare-earth alloy powder is fed into the cavity. A correcting yoke is disposed near the die, on a side from which a compact is taken out, and an orienting magnetic field is applied. At this time, the correcting yoke is disposed on an upper side of the die if the compact is to be taken out from the upper side of the die whereas the correcting yoke is disposed on a lower side of the die if the compact is to be taken out from the lower side of the die, an inward side surface of the correcting yoke and an inward side surface of the auxiliary yoke are made flush with a plane vertical to a direction in which the orienting magnetic field is applied, and the correcting yoke is urged toward the die. Then, the rare-earth alloy powder is pressed by an upper punch and a lower punch to form a compact. The correcting yoke and the auxiliary yoke may be made integrally with each other.