Abstract: A method for the die casting of end rings and conductor bars in rotors employing a die casting machine having a compensator mechanism comprising a compensator sleeve and a compensator for reciprocal movement along a first axis. A coaxially movable die plate closes off one end of the compensator sleeve to form a die cavity for casting. A plurality of lamination stacks, each held together by a removable stacking pin, are stored on an inclined loading rack positioned laterally on one side of the compensator mechanism. A few of these stacks roll down inclined planes into the compensator sleeves. The compensator pushes the stacks forward into abutment with the die plate and a charge of molten material is injected into the die cavity. The die plate then moves axially away from the compensator and a retriever moves perpendicular to the first axis to an unload position between the compensator sleeve and die plate.

Abstract: An automatic part loading unit for loading various diameter and stack height sizes of rotor assemblies into the compensator sleeves of multiple cavity rotor dies for the subsequent casting of the conductor bars and end rings of squirrel cage electrical motor rotors. The loading unit comprises a magazine section having a plurality of inclined guide tracks on which the rotor preforms are stacked, and an escapement mechanism which permits one rotor preform at a time to roll from each of the guide tracks in the magazine section onto respective inclined guide tracks leading to the breech openings of the die cavities. The guide tracks are laterally adjustable so as to accommodate rotor preforms of various stack height. As the rotor preforms roll down the inclined guide track toward the die cavities, they are decelerated by means of pivotally mounted, counterweighted arms which are contacted by and then swung out of the way by the rotors.