COMPACTING METHOD IN MAGNETIC FIELD, METHOD FOR MANUFACTURING RADIAL ANISOTROPIC RING MAGNET, COMPACTING APPARATUS IN MAGNETIC FIELD, AND RADIAL ANISOTROPIC RING MAGNET

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a long radial anisotropic ring magnet without causing any junction sections and disturbance in orientation.;SOLUTION: A compact is obtained by a compacting method in a magnetic field, having a filling step for filling magnet powder P into a ring-like cavity 3, and a compacting step in a magnetic field for orientating the magnet powder P in a radical direction by applying mutually repelling magnetic fields to each prescribed region of the cavity 3 and obtaining the compact by performing the pressure forming of the orientated magnet powder P. The obtained compact is sintered. In the compacting in a magnetic field, no magnet powder P needs to be added halfway. The orientation direction of the magnet powder P can be made constant from the inner periphery side to the outer periphery side of a cavity 3 or in the other direction since mutually repelling magnetic fields are used, thus preventing orientation from being disturbed.;COPYRIGHT: (C)2006,JPO&NCIPI