Production method for powdered core

Details Production method for powdered core Production method for powdered core

2007-09-25

2007-09-25

Sheehan, John P. (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

C419S065000, C419S064000

Reexamination Certificate

active

11591635

ABSTRACT:
The present invention provides a production method for a powdered core, including steps of preparing a mixture including a soft magnetic powder and a resin powder to obtain a mixture, compacting the mixture into a predetermined shape to obtain a green compact and heating the green compact, and wherein the resin powder has a median size of not more than 50 μm, and the resin powder amount is 0.01 to 5 vol %. The method reduces production cost, and decreases eddy-current loss Weand hysteresis loss Wh, whereby a powdered core in which a durability is improved and the technical advantages are expanded can be provided.

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