Resin filling method and resin filling device for magnet embedded core

[0028]Embodiments of the present invention are described in the following with reference to the appended drawings.

[0029]FIG. 1 is a plan view of a magnet embedded rotor 1 according to an embodiment of the present invention, and FIGS. 2 and 3 are sectional views taken along lines II-II and III-III in FIG. 1, respectively.

[0030]As shown in FIG. 1, a magnet embedded rotor (magnet embedded core) 1 is a constituent part of a motor or the like, and includes a rotor core (motor core) 2 consisting of a laminated iron core, and permanent magnets 4 accommodated respectively in a plurality of magnet insertion holes 3 formed in the rotor core 2. The laminated iron core constituting the rotor core 2 is formed by stacking a plurality of electromagnetic steel plates connected together by a known connecting method (crimping, gluing, laser-welding, etc.). The rotor core 2 is substantially in a shape of an annular ring as seen in plan view, and is provided with an axial hole 5 opened at the center there