Patent ID: 8951030
Filing Date: 2015-02-10
Classification: B29C,H02K

Abstract:
1. A resin filling device for a laminated iron core, the resin filling device being used when a magnet insertion hole provided in the laminated iron core of a rotor for an electric motor is filled with a molten resin for fixing a magnet, comprising: a resin feeding mold that is brought into abutment with a first end face of the laminated iron core in which an opening of the magnet insertion hole is made; an opposing mold that is brought into abutment with a second end face of the laminated iron core on the opposite side of the first end face with which the resin feeding mold is brought into abutment; and a pressing mechanism part that applies a compression force in a state where the laminated iron core is sandwiched between the resin feeding mold and the opposing mold, wherein the resin feeding mold includes one or more discharge outlets arranged so as to face the opening of the magnet insertion hole, and a feeding mechanism part that feeds the molten resin towards the discharge outlet, the discharge outlet includes a diameter reducing part in which an inner diameter is reduced gradually along a discharge direction of the molten resin, a projecting part made by projecting a periphery of the discharge outlet is provided on a surface of the resin feeding mold, and the diameter reducing part is provided inside of the projecting part, and the diameter reducing part is arranged at a position on an inner side of the laminated iron core between the first end face and second end face of the laminated iron core in the state where the laminated iron core is sandwiched between the resin feeding mold and the opposing mold.