Method of Manufacturing Magnet Embedded Core
AssigneeKuroda Precision Industries Ltd.
InventorOsamu FUKUYAMA
Life of this patent
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Abstract
In a method of manufacturing a magnet embedded core (1), creation of unnecessary resin from the resin for fixedly securing the magnet is prevented. The method includes a resin charging step of charging resin material (3) in solid form into the magnet insertion hole; a melting step of melting the resin material (33) in the magnet insertion hole, and a pressurization step of pressurizing an interior of the magnet insertion hole (3). The melting step includes melting the resin material (33) at least partly by preheating and inserting the magnet (4) into the magnet insertion hole (3).
Claims20
A method of manufacturing a magnet embedded core including a magnet embedded in resin filling a magnet insertion hole extending axially in a motor core, the method comprising:
- a resin charging step of charging resin material in solid form into the magnet insertion hole;
- a melting step of melting the resin material in the magnet insertion hole;
- and a pressurization step of pressurizing an interior of the magnet insertion hole,
- wherein the melting step includes melting the resin material at least partly by preheating and inserting the magnet into the magnet insertion hole.
A device for manufacturing a magnet embedded core including a magnet embedded in resin filling a magnet insertion hole extending axially in a motor core, the device comprising:
- a motor core heating oven for preheating the motor core prior to charging the resin into the magnet insertion hole;
- an upper die and a lower die vertically opposing each other, and configured to clamp therebetween the motor core preheated by the motor core heating oven;
- and
- a heating unit for melting the resin in solid form in the magnet insertion hole by heating the motor core placed on the lower die,
- wherein the upper die and the lower die are configured to pressurize an interior of the magnet insertion hole by clamping the motor core with the resin and magnet placed in the magnet insertion hole.
Dependencies are inferred from the claim text.