Patent ID: 9431883
Filing Date: 2016-08-30
CPC Classification: H02K,Y10T

Claim Text:
1. A method of manufacturing a laminated core, the laminated core including a laminated core body formed by laminating a plurality of core sheets, the laminated core body having magnet insertion holes with openings opening to a inner space or an external side, inserting permanent magnets in the magnet insertion holes, and resin-sealing the permanent magnets in the magnet insertion holes with the openings blocked by a blocking member, the method comprising: a first step of forming a blocking member piece to be the blocking member in each of the core sheets; a second step of assembling the core sheets, and forming the laminated core body having the magnet insertion holes of which circumferences are in a blocked state; a third step of resin-sealing the permanent magnets in the magnet insertion holes; and a fourth step of removing the blocking member, and opening some of the magnet insertion holes for improvement in magnetic characteristics of and weight saving of the laminated core.