| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing a laminated core exhibiting excellent characteristics by enhancing the film thickness accuracy of an adhesive layer, and having excellent appearance by suppressing extrusion of an adhesive layer from the inner and outer peripheries of a magnetic steel sheet.SOLUTION: A method of manufacturing a laminated core 10 includes a molding step and a bonding step. In the molding step, a magnetic steel sheet 11 having an adhesive layer 12 on one principal surface is punched into a predetermined shape. In the bonding step, a plurality of the magnetic steel sheets are superposed, and then hot pressed entirely thus bonding the magnetic steel sheets by means of an adhesive layer. The adhesive layer is composed of a thermosetting resin composition containing (A) an epoxy resin, (B) a hardener for epoxy resin, and (C) a synthetic rubber, in which the (C) rubber component is contained 40 mass% or more in the solid content. After the bonding step, the amount of protrusion L of the adhesive layer from the outer periphery and inner periphery of the magnetic steel sheet is -10 through 10 μm. |
