Manufacturing method of laminated iron core, manufacturing apparatus of laminated iron core, laminated iron core, and rotary electric machine

Abstract

A manufacturing method of a laminated iron core includes: a step of pressing, with a die (2), an electrical steel sheet having a coating containing an adhesive that exhibits adhesive ability through heating, provided to a sheet surface thereof, to obtain a unit iron core (1); and a step of laminating the unit iron cores (1) pressed with the die (2), and heating the sheet surface of the unit iron core (1) of an uppermost layer at a plurality of partial regions to make the unit iron core (1) of the uppermost layer to be partially adhered to the unit iron core (1) of a lower layer thereof at a plurality of regions. As above, by performing the presswork and the lamination substantially simultaneously as a series of operation, it is possible to increase the efficiency of manufacture of the laminated iron core without increasing the man-hour.

Dependencies are inferred from the claim text.