Patent ID: 6875003

Claim:
A molding die set for molding a rotor for rotating an output shaft of a motor having a rotor body made of synthetic resin, and a magnet formed of an annular shape and magnetized and fixed on said rotor body, the rotor body having an inner cover portion for covering an inner surface of the magnet and an outer cover portion for covering an outer surface of the magnet, said molding die set comprising: a first molding die having a first molding surface opposing a space adjacent a radially inner surface of a magnet installed in the molding die set; and a second molding die having a second molding surface opposing a space adjacent a radially outer surface of the magnet, the second molding die including a support projection projecting from the second molding surface for supporting the magnet in the molding die set by abutting the radially outer surface of the magnet in a cavity surrounded by the first molding surface and the second molding surface, wherein the rotor has end-face cover portions extending continuously between the inner cover portion and the outer cover portion for completely covering the end faces of the magnet, wherein the first molding surface and the second molding surface cooperate to oppose respectively a space adjacent to and extending completely across, one end face of the magnet, said molding die set further comprising a third molding die having a third molding surface opposing a space adjacent to and extending completely across, the other end face of the magnet.