Abstract: At the time of molding, in the stator, the resin material flows inside the vent channels that are formed on the terminal block. At this time, as the resin reservoirs which are formed by expanding cross-sections of the vent channels are provided on the mounting surface of the terminal block, the resin material can be retained in the resin reservoirs. This consequently prevents the resin material from flowing through the vent channels to the outside of the terminal block. When the resin leaked part, which is the resin material that has leaked from the vent channels to the outside and been hardened, falls while using the motor, there is an adverse effect on another piece of equipment. Thus, the resin reservoirs that are formed in the vent channels act effectively in terms of preventing the resin material from flowing to the outside.

Abstract: A method that can produce a high-performance stator by providing only an upper or lower fixed piece for latching a coil on an insulator and thus effectively suppressing loosening of the coil winding wire when resin is injected while improving the production efficiency of the insulator. The method includes producing an intermediate by disposing a coil around an insulator, which includes a tubular portion, a flange at one end thereof, and a fixed piece that, when the insulator is loosely fit around the tooth, extends in the radial direction of the tooth from an end side of the flange corresponding to an upper or lower end face of the tooth, and has a coil latching claw, and loosely fitting the insulator with the coil around the tooth; and placing the intermediate in a die and injecting resin from around a region where the coil is latched by the fixed piece.

Abstract: A manufacturing method of a stator is a method for manufacturing the stator using molds. The stator is constructed so that a stator main body and resin molded portion are integrated. The stator main body includes a terminal portion and a core. The manufacturing method includes: arranging the stator main body such that the terminal portion is located on a top portion of the molds; and filling a cavity with resin. The terminal portion has a gas discharging port configured to discharge gas out of the cavity from inside the cavity in the molds.

Abstract: The present invention is an unsaturated polyester resin composition comprising an unsaturated polyester (a), a monomer (b) having one polymerizable carbon-carbon double bond, a monomer (c) having two or more of (meth)acrylate groups, a filler (d) having high thermal conductivity, a glass fiber (e), a low profile additive (f), a curing agent (g), and a polymerization inhibitor (h), wherein the ratio by weight of the ingredient (b) to the ingredient (c) is from 50:50 to 75:25 and the unsaturated polyester resin composition comprises 400 to 1400 parts by weight of the ingredient (d) based on the total 100 parts by weight of the ingredients (a), (b), and (c). This unsaturated polyester resin composition has excellent curing properties without losing storage stability which can be used to provide a cured product having a low mold shrinkage ratio and high thermal conductivity.

Abstract: At the time of molding, in the stator, the resin material flows inside the vent channels that are formed on the terminal block. At this time, as the resin reservoirs which are formed by expanding cross-sections of the vent channels are provided on the mounting surface of the terminal block, the resin material can be retained in the resin reservoirs. This consequently prevents the resin material from flowing through the vent channels to the outside of the terminal block. When the resin leaked part, which is the resin material that has leaked from the vent channels to the outside and been hardened, falls while using the motor, there is an adverse effect on another piece of equipment. Thus, the resin reservoirs that are formed in the vent channels act effectively in terms of preventing the resin material from flowing to the outside.

Abstract: A method that can produce a high-performance stator by providing only an upper or lower fixed piece for latching a coil on an insulator and thus effectively suppressing loosening of the coil winding wire when resin is injected while improving the production efficiency of the insulator. The method includes producing an intermediate by disposing a coil around an insulator, which includes a tubular portion, a flange at one end thereof, and a fixed piece that, when the insulator is loosely fit around the tooth, extends in the radial direction of the tooth from an end side of the flange corresponding to an upper or lower end face of the tooth, and has a coil latching claw, and loosely fitting the insulator with the coil around the tooth; and placing the intermediate in a die and injecting resin from around a region where the coil is latched by the fixed piece.

Abstract: A manufacturing method of a stator is a method for manufacturing the stator using molds. The stator is constructed so that a stator main body and resin molded portion are integrated. The stator main body includes a terminal portion and a core. The manufacturing method includes: arranging the stator main body such that the terminal portion is located on a top portion of the molds; and filling a cavity with resin. The terminal portion has a gas discharging port configured to discharge gas out of the cavity from inside the cavity in the molds.

Abstract: The present invention is an unsaturated polyester resin composition comprising an unsaturated polyester (a), a monomer (b) having one polymerizable carbon-carbon double bond, a monomer (c) having two or more of (meth)acrylate groups, a filler (d) having high thermal conductivity, a glass fiber (e), a low profile additive (f), a curing agent (g), and a polymerization inhibitor (h), wherein the ratio by weight of the ingredient (b) to the ingredient (c) is from 50:50 to 75:25 and the unsaturated polyester resin composition comprises 400 to 1400 parts by weight of the ingredient (d) based on the total 100 parts by weight of the ingredients (a), (b), and (c). This unsaturated polyester resin composition has excellent curing properties without losing storage stability which can be used to provide a cured product having a low mold shrinkage ratio and high thermal conductivity.