| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a columnar bond magnet excellent in magnetic characteristics. <P>SOLUTION: In a method for manufacturing a columnar bond magnet to be obtained by performing extrusion molding of a bond magnet composition consisting of anisotropic magnetic powder and resin, it has processes of: forming a magnetic field for orientation in which a magnetic field line goes along the axis direction in a space inside a columnar magnet axially oriented in the axis direction by arranging the columnar magnet in a metal mold 2 for extrusion molding as a magnet 5 for orientation; orienting the magnetic powder in the axis direction and performing extrusion molding of a bond magnet composition by making the bond magnet composition passing through in the magnetic field for orientation; preparing a magnetizer with at least a pair of air-core coils which are constituted by winding thin metallic wire for a plurality of times, respectively, in forward and backward directions; and performing magnetization processing of the bond magnet composition whose extrusion molding is performed by the magnetizer, and the magnetic field line which radially goes in and out of the radial direction of the columnar bond magnet is formed by the processes. <P>COPYRIGHT: (C)2013,JPO&INPIT |
