| 摘要 |
PURPOSE:To remove the layer short of a cut surface, and to reduce the high-frequency iron loss of a high-frequency core by a method wherein the laminated core formed by laminating a magnetic thin belt having high specific permeability and by impregnating with resin between the layers is cut, and the cut surfaces of the core body are finished to the surfaces removed with flashes generated at cutting time. CONSTITUTION:An amorphous magnetic thin belt is wound round elliptically to form a laminated core, and the laminated core is heat-treated. Then to fix the respective layers of the laminated amorphous magnetic thin belt with resin 6, the neighborhood of the central part of the long side of the laminated core is heated to be percolated with microcrystalline wax extending over about 20mm.. Then the laminated core impregnated with the resin 6 is cut by a GC microcutter to obtain a core body 1 of cut core. Then the shaded parts shown in the figure of the cut surfaces 2 are abraded by a proper abrasive plate up to obtain electric resistance of 0.3OMEGA/mm., and flashes 5 are removed. The fellow cut surfaces 2 are joined using two pieces of the core bodies 1 consisting of the U-type cut cores obtained in such a way to obtain the desired high-frequency core. Accordingly, the layer short of the cut surfaces to be generated according to the flashes 5 can be removed, and the high-frequency core reduced especially with high-frequency iron loss can be produced. |
