Patent ID: 8276646
Filing Date: 2012-10-02
Classification: B22C,B22D,H02K

Abstract:
1. An apparatus for manufacturing a rotor for use in a rotary electric machine by casting a hollow boss radially inwardly of a cylindrical rotor core, comprising: a first die for holding the rotor core; a second die for defining a cavity between the first die and the second die; and a core assembly removably mounted in the first die, for forming the boss, the core assembly including wherein the correcting surface of the seat extends in a casting removal direction along which a casting is released so as to contact an inner circumferential surface of an open end of the boss to prevent the open end from being deformed when the casting is released, wherein the support column has a plurality of fins extending radially outwardly and in the casting removal direction and aligned with respective mating surfaces of the separate cores, and wherein the separate cores are spaced from each other by a distance corresponding to a thickness of the fins.