Coil-embedded dust core production process, and coil-embedded dust core
First Claim
1. A process for producing a coil-embedded dust core by embedding a coil in magnetic powders comprising ferromagnetic metal particles coated with an insulating material, which includes:
- a first compression molding step wherein one portion of magnetic powders is filled in a molding die and then compression molded to form a lower core, a coil positioning step wherein said coil is positioned on an upper surface of said lower core in said molding die, a coil embedding step wherein another portion of magnetic powders is again filled in said molding die in such a way that said coil is embedded in these magnetic powders, and a second compression molding step wherein pressure is applied to said lower core and said coil in a direction of lamination thereof.
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Abstract
The invention provides a process for producing a coil-embedded dust core by embedding a coil in magnetic powders comprising ferromagnetic metal particles coated with an insulating material. At the first compression molding step one portion of magnetic powders is filled in a molding die and then compression molded to form a lower core. At a coil positioning step the coil is positioned on the upper surface of the lower core in the molding die. At a coil embedding step another portion of magnetic powders is again filled in the molding die in such a way that the coil is embedded in these magnetic powders. At the second compression molding step pressure is applied to the lower core and coil in the direction of lamination thereof.
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Citations
10 Claims
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1. A process for producing a coil-embedded dust core by embedding a coil in magnetic powders comprising ferromagnetic metal particles coated with an insulating material, which includes:
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a first compression molding step wherein one portion of magnetic powders is filled in a molding die and then compression molded to form a lower core, a coil positioning step wherein said coil is positioned on an upper surface of said lower core in said molding die, a coil embedding step wherein another portion of magnetic powders is again filled in said molding die in such a way that said coil is embedded in these magnetic powders, and a second compression molding step wherein pressure is applied to said lower core and said coil in a direction of lamination thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification