| 摘要 |
<p>An apparatus for casting a conductor of a cage rotor for an induction motor. A rotor core (13) comprising laminated steel sheets is placed in a cavity of a casting mold, and an upper end portion of the rotor core is held by a retainer (70). When molten metal is supplied to a plurality of slots formed in the rotor core, a plurality of conductor rods and a pair of end rings connecting the end portions of these conductor rods are formed. The retainer (70) comprises a cup (72) and a cylinder (73), and the axial length of the cup (72) is selectively determined in accordance with that of the rotor core (13) placed in the cavity of the casting mold. When the retainer (70) is formed of a double cylinder (77, 79), a rotor of a higher quality can be obtained. This enables conductors of rotors of various axial lengths having qualities meeting various demands to be cast by the same conductor casting apparatus.</p> |
