| 摘要 |
<p>A rotor core is accommodated in a cavity (C1, C2) in such a manner that the direction of lamination of an electromagnetic steel sheet that constitutes the rotor core becomes a vertical direction. Liquid-phase pure aluminum is supplied into the cavity (C1, C2) from the bottom of the cavity (C1, C2) at a low-speed laminar flow filling rate of 0.05 to 0.2 [m/sec] inclusive. The temperature of aluminum which is in contact with the rotor core (200) that has been accommodated in the cavity (C1, C2) is set at 630 to 660[°C] inclusive.</p> |
