Laminated Core And Method For Manufacturing Laminated Core

Abstract: A laminated core 10 is formed by alternately laminating electromagnetic steel sheets 1 and adhesive insulating films 2. After completion of reaction of the adhesive insulating films 2, the tensile adhesive strength in a laminating direction D of the laminated core 10 is 20 MPa or higher when measured under a condition at 25°C. A method for manufacturing the laminated core 10 comprises: a punching step for punching electromagnetic steel sheets coated with the adhesive insulating films 2 and forming the electromagnetic steel sheets 1; a storage step for laminating and storing the electromagnetic steel sheets 1 in a mold after the punching step; a low-pressure adhesion step for heating the electromagnetic steel sheets 1 in the mold at a surface temperature of 60-200°C, applying pressure on the electromagnetic steel sheets at 3.0 MPa or lower, and bonding the adjacent electromagnetic steel sheets 1 to each other, to thereby form the laminated core 10; and a taking-out step for taking out the laminated core 10 from the mold after the low-pressure adhesion step.

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