Patent ID: 9614403
Date: 2017-04-04
CPC Classifications: B29C,B29L,H02K

Claim:
1. A method for manufacturing a resin molded stator, the method comprising: a) preparing a straight winding core comprising a plurality of core elements, a plurality of joints, and a plurality of windings, wherein the plurality of core elements are linearly arranged, the core elements each comprise a partial core back and a tooth, neighboring partial core backs of the partial core backs are coupled together by one of the joints, and the windings are wound around the respective teeth; b) bending the straight winding core at the plurality of joints into an annular shape in which the plurality of teeth are directed radially inward and causing distal ends of the plurality of teeth to face an outer peripheral surface of a columnar core metal to thereby obtain a core metal assembly in which a stator is mounted on the core metal, and arranging the core metal assembly in a mold, or causing distal ends of the plurality of teeth to face an outer peripheral surface of a columnar core metal in a mold provided with the core metal to thereby obtain a core metal assembly in which a stator is mounted on the core metal, and locating the core metal assembly in the mold; c) injecting a resin into the mold, covering at least the windings of the respective teeth with the resin, and curing the resin; and d) removing the stator molded with the resin from the mold and the core metal, wherein the core metal comprises a plurality of ribs that project radially outward from the outer peripheral surface, the number of the ribs being three or more and less than the number of the teeth, each of the plurality of ribs extends parallel to a center axis, and in the core metal assembly, each of the plurality of ribs is located in a gap between the distal ends of the teeth adjacent to each other.