| 摘要 |
<p>When an outer core that is to be mounted on a reactor is seen in plan, the outer core is a compact that has a plan-view shape in which a side of the outer core that is opposite to a facing side of the outer core, which faces the inner cores, has a smaller dimension in a width direction, which is parallel to a facing surface, than the facing side of the outer core. A method of manufacturing such an outer core includes a preparing step and a compacting step. In the preparing step, coated soft magnetic powder including multiple coated soft magnetic particles formed by coating soft magnetic particles with insulating coated films is prepared as raw-material powder of the outer core. In the compacting step, a compacting space 31, which is defined by a pillar-like lower punch 12 and a tubular die 10A, is filled with the coated soft magnetic powder and then the coated soft magnetic powder in the compacting space 31 is compacted by the lower punch 12 and a pillar-like upper punch 11, the lower punch 12 and the tubular die 10A being movable relative to each other. In the compacting step, the facing surface of the outer core is pressed by the upper punch 11.</p> |
