Fuji Jukogyo Kabushiki Kaisha

Nobuyuki Mabuchi

Jiro Maruyama

Motoyuki Fujiwara

Koji Etoh

The present invention provides a process and an apparatus for the preparation of a motor coil by which a longitudinally wound motor coil, so called, can be easily prepared. First, a molded productcomprising a column part, and a fin partprojected in the form of flat plate from an outer peripheral surfaceA,B,C,D of the column part to an outer side in a radial direction of the column part and helically continuing in an axis direction of the column part at predetermined intervals along the outer peripheral surface of column part is prepared. The column partof the first molded product is punched out in an axis direction of the column part with retaining the fin partto remove the column part, and the fin parthaving helical shape left after the removal is coated with an insulating film. Then both sides of the fin partin a direction F punching out the column partare pressurized to deform the fin partsuch that flat plate portions of the fin partare superposed on one another.

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Tokyo, Japan

Nobuyuki Mabuchi