Title:
MOLDING DIE FOR ANISOTROPIC BONDED MAGNET AND PRODUCTION METHOD USING THE SAME
Document Type and Number:
Japanese Patent JP2018127668
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a molding die capable of adjusting a surface magnetic flux density to a desired waveform with a highly-oriented magnetic field with respect to an anisotropic bonded magnet.SOLUTION: The molding die is provided with a mold frame member 2 for defining a hollow portion 3 which can be filled with a composition Cm containing a material of an anisotropic bonded magnet to be formed, and an orienting magnet 4 for magnetically orienting the magnet material of the composition Cm in the hollow portion 3. The orienting magnet 4 is arranged as a plurality of permanent magnets 5 which give a magnetic field facing the center position of a corresponding magnetic pole Mp so as to configure a desired surface magnetic flux density waveform to each magnetic pole Mp of the anisotropic bonded magnet. The molding die is also provided with a main permanent magnet 5a for applying a magnetic field to a region including the center position, and a pair of sub permanent magnets 5b and 5c arranged so as to sandwich the main permanent magnet 5a and to exert a magnetic field in a direction inclined at a predetermined angle with respect to the magnetic field direction of the main permanent magnet 5a. The molding die is further provided with an oriented magnetic body 6 made of a ferromagnetic material which is disposed between the magnetic pole Mp and the main permanent magnet 5a.SELECTED DRAWING: Figure 1
Inventors:
TSUBOI YOSHIHIRO
MATSUDA HIDEKI
MATSUDA HIDEKI
Application Number:
JP2017021195A
Publication Date:
August 16, 2018
Filing Date:
February 08, 2017
Export Citation:
Assignee:
SUMITOMO METAL MINING CO
International Classes:
B22F3/035; B22F3/00; H01F13/00; H01F41/02
Attorney, Agent or Firm:
Akira Ueda
Masahiro Koizumi
Masahiro Koizumi