Patent ID: 6453980
Filing Date: 2002-09-24
Classification: B22D

Abstract:
A method for vertical die casting of a squirrel cage rotor for an induction electric motor using a gating system, the rotor including a rotor core having a plurality of slots, the gating system including at least one end ring cavity, a plurality of passages in fluid communication with the end ring cavity for forming rotor bars, at least one gate in fluid communication with the end ring cavity, and the end ring cavity having an upper edge, said method comprising the steps of:positioning the rotor core inside the gating system; and filling the gating system with molten metal through the gate such that the end ring cavity upper edge facilitates preventing molten metal from directly entering the plurality of passages such that the end ring cavity is substantially filled prior to introducing molten metal into each of the plurality of passages at approximately the same rate.