Coil manufacturing method, coil manufacturing device, coil, and motor
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United States of America Patent
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Oct 25, 2022
Grant Date -
May 7, 2020
app pub date -
Jun 12, 2018
filing date -
Sep 28, 2017
priority date (Note) -
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Abstract
A manufacturing method for a coil includes: a step of winding a wire (conductive wire) in multiple layers and multiple rows and forming a coil having a trapezoidal cross-sectional shape; a step of arranging the coil in a molding space surrounded by a plurality of split dies; and a step of moving the slit die in a direction of narrowing the molding space to mold the cross-sectional shape of the coil. In the step of molding the cross-sectional shape, at least one of the plurality of split dies is moved to mold the cross-sectional shape into a fan shape by surfaces formed in the split dies.
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