Method of producing inductor

Details Method of producing inductor Method of producing inductor

H - Electricity

01

L

H01L 21/77 (2006.01) H01F 41/00 (2006.01) H01F 41/12 (2006.01)

Patent

CA 2273769

The present invention is for providing a production method of a bead inductor, capable of preventing deformation of a metal coil or dislocation of the axis position of the metal coil by the injection pressure at the time of injecting a molten resin material from a gate. A coil is fitted onto a coil supporting pin provided on a first lower mold of a mold for injection molding in a cavity of the. mold for injection molding such that the inner periphery of the coil is closely contacted with the coil supporting pin. A molten resin material is injected into the cavity. Then, the coil supporting pin and the first lower mold are taken out from the molded product, and a second lower mold without a coil supporting pin is provided for replacement. A molten resin material is injected into the space which has been occupied by the coil supporting pin. After removing the hardened resin molded product from the mold for injection molding, the end parts of the coil are cut so as to be exposed.

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