COMPRESSED POWDER COMPACT

摘要

A compact 10 is obtained by compression-molding coated soft magnetic particles covered with insulating coatings, and is a modified frustum body having, as a main body, a frustum portion 113 sandwiched between plate-shaped portions 111 and 112 arranged in opposing relation. A vertical cross-section of the compact 10 is made up of a trapezoidal surface 113s, a long-side rectangular surface 111s joining to a long side of the trapezoidal surface 113s, and a short-side rectangular surface 112s joining to a short side of the trapezoidal surface 113s. A surface of the compact 10 in sliding contact with a forming mold is mainly constituted by an outer peripheral surface 113o of the frustum portion 113, and the outer peripheral surface 113o is inclined relative to a direction in which a compression-molded product is drawn out from the mold. Therefore, friction between the compression-molded product and the mold can be reduced, and damage of the insulating coatings can be reduced in the compact 10. Hence the compact 10 exhibits not only good productivity due to shortening of a post-treatment time, but also a low loss.