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:
May. 30, 2017
Filed:
Apr. 05, 2011
Yoshinobu Honkura, Tokai, JP;
Hironari Mitarai, Tokai, JP;
Hiroshi Matsuoka, Tokai, JP;
Masayuki Kato, Tokai, JP;
Ikuzou Okumura, Tokai, JP;
Yoshinobu Honkura, Tokai, JP;
Hironari Mitarai, Tokai, JP;
Hiroshi Matsuoka, Tokai, JP;
Masayuki Kato, Tokai, JP;
Ikuzou Okumura, Tokai, JP;
AICHI STEEL CORPORATION, Aichi, JP;
Abstract
A method for production of an anisotropic bonded magnet includes: aligning magnetic pole bodies which include an even number of permanent magnets arranged uniformly around an outer periphery of an annular cavity filled with magnetic raw material, aligning magnetic fields to cause rare-earth anisotropic magnet powder to be semi-radially aligned; compressively molding the semi-radially aligned magnet raw material to obtain an annular compact; discharging the compact from the annular cavity; demagnetizing causing the aligning magnetic pole bodies to relatively move only in circumferential direction with respect to the compact after the molding step thereby to apply demagnetization magnetic fields to the compact; The demagnetization magnetic fields are applied from the aligning magnetic pole bodies with opposite poles to those during the alignment step, and the demagnetization magnetic fields are in directions for cancelling the magnetization of the compact caused by the aligning magnetic fields.