Core member, reactor, and method for manufacturing core member
AssigneesAutonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
InventorKazuhiro Inaba
Life of this patent
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Abstract
A core member capable of favorably meeting required characteristics is provided. A core member according to the present invention is obtained by molding a mixture containing soft magnetic powder and a resin. This core member includes a specific portion including, as a specific surface, at least one of an installation surface facing an object on which the core member is to be installed and an interlinkage surface that is intersected by a magnetic flux excited by a coil, and an opposite surface on a side opposite to the specific surface. The specific portion has a higher density than a region of the opposite surface.
Claims11
A core member obtained by molding a mixture containing soft magnetic powder and a resin, the core member comprising:
- a base portion and a pair of projecting portions spaced apart from each other and projecting from the base portion;
- an installation surface disposed on a bottom portion of the base portion, the installation surface facing an object on which the core member is to be installed and an interlinkage surface disposed on an end of each of the projecting portions, the interlinkage surface being intersected by a magnetic flux excited by a coil;
- and
- wherein the installation surface and the interlinkage surface has a higher density than the base portion and the pair of projecting portions.
A method for manufacturing a core member, comprising:
- a step of molding a core member by injecting a mixture containing soft magnetic powder and a resin into a mold through a gate and curing the resin,
- wherein the mold includes:
- a specific inner peripheral surface for molding a specific surface including at least one of an installation surface facing an object on which the core member is to be installed and an interlinkage surface that is intersected by a magnetic flux excited by a coil, out of the surfaces of the core member;
- and
- an opposite inner peripheral surface for molding an opposite surface on a side opposite to the specific surface,
- wherein the gate is located close to the opposite inner peripheral surface rather than the specific inner peripheral surface in the mold.
Dependencies are inferred from the claim text.