US 12,407,207 B2
Insulating member for slot coil of rotary electric machine and method for molding the same
Noritaka Ogawa, Tokyo (JP)
Assigned to NAKAGAWA SPECIAL STEEL INC., Tokyo (JP)
Appl. No. 17/920,804
Filed by NAKAGAWA SPECIAL STEEL INC., Tokyo (JP)
PCT Filed Apr. 21, 2021, PCT No. PCT/JP2021/016218
§ 371(c)(1), (2) Date Oct. 24, 2022,
PCT Pub. No. WO2021/215482, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 2020-077333 (JP), filed on Apr. 24, 2020.
Prior Publication US 2023/0208235 A1, Jun. 29, 2023
Int. Cl. H02K 3/34 (2006.01); H02K 15/085 (2006.01); H02K 15/10 (2006.01); H02K 15/12 (2006.01)
CPC H02K 3/345 (2013.01) [H02K 15/085 (2013.01); H02K 15/10 (2013.01); H02K 15/12 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for molding an insulating member for a slot coil of a rotary electric machine, wherein said slot coil being fitted into a slot provided in a stator or rotor of the rotary electric machine, and the method comprises:
forming the insulating member by molding of thermoplastic synthetic resin, wherein the insulating member is formed with through-holes with rectangular cross section for inserting lead wire and the through-holes are parallel to each other, and the insulating member has partition walls and outer peripheral walls for insulating the lead wire electrically, and
inserting the lead wire into the through-holes, wherein the lead wire having a cross section similar to the cross section of the through-holes;
wherein said insulating member has at least one flange formed on periphery at one end thereof as well as formed to be thicker than the partition walls and the outer peripheral walls, the at least one flange serving as flow path for injected molten resin as the thermoplastic synthetic resin when the insulating member is formed by injection molding;
wherein in the method for molding the insulating member, lug part flanges are disposed to be integral with the at least one flange for causing molten resin to flow through gates for injecting the molten resin, after then to convert direction of flow by 90° twice and then to flow into the at least one flange when the insulating member is formed by injection molding of molten resin.