Insulated motor core and method for producing same
AssigneeMinebea Co., Ltd.
InventorsNoriyuki Yoshimura, Kesao Suzuki
Life of this patent
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Abstract
A motor core coated with a multi-layer insulating film. The insulating film preferably includes in order: an electrodeposited coating film applied upon an outer surface of the motor core; a first spray coated insulating film applied upon an outer surface of the electrodeposited coating film the first film having a pencil hardness of between about 2H and 4H; and a second spray-coated insulating film applied upon an outer surface of the first spray-coated insulating film, the second film having a pencil hardness of between about 3H and 6H. The invention is additionally directed to a variety of methods for forming such insulation-coated cores.
Claims39
A method for preparing a motor core coated with a multi-layer insulating film, the method comprising:
- (a) coating a motor core, having first and second opposed surfaces, with an electrodeposited coating film;
- (b) applying, to an outer surface of the electrodeposited film, a first spray-coated insulating film having a pencil hardness of between 2H and 4H;
- and
- (c) applying, upon an outer surface of the first spray-coated insulating film, a second spray-coated insulating film having a pencil hardness of between 3H and 6H.
A method for preparing a motor core coated with a multi-layer insulating film, the method comprising:
- (a) coating a motor core, having first and second opposed surfaces, with an electrodeposited coating film;
- (b) placing the electrodeposition-coated core upon a coating tool;
- (c) applying, to an outer portion of a first surface of the electrodeposited film, a first spray-coated insulating film having a pencil hardness of between 2H and 4H;
- (d) applying, upon an outer portion of the first spray-coated insulating film on the first core surface, a second spray-coating insulating film having a pencil hardness of between 3H and 6H;
- (e) turning the motor core over upon the coating tool so as to expose the second opposed surface thereof for further coating;
- (f) applying, to an outer portion of a second surface of the electrodeposition film, a first spray-coated insulating film having a pencil hardness between 2H and 4H;
- and
- (g) applying, upon an outer portion of the first spray-coated insulating film on the second opposed core surface, a second spray-coated insulating film having a pencil hardness of between 3H and 6H.
A method for preparing a motor core coated with a multi-layer insulating film, the method comprising:
- (a) coating a motor core, having first and second opposed surfaces, with an electrodeposited coating film;
- (b) placing the electrodeposition-coated core upon a coating tool;
- (c) applying, to an outer portion of a first surface of the electrodeposited film, a first spray-coated insulating film having a pencil hardness of between 2H and 4H;
- (d) turning the core over upon the coating tool to expose the second opposed surface of the core;
- (e) applying, to an outer portion of a second surface of the electrodeposited film, a first spray-coated insulating film having a pencil hardness of between 2H and 4H;
- (f) applying, upon an outer portion of the first spray-coated insulating film on the second opposed core surface, a second spray-coated insulating film having a pencil hardness of between 3H and 6H;
- (g) turning the core over on the coating tool to expose the coated first surface of the core;
- and
- (h) applying, upon an outer portion of the first spray-coated insulating film on the coated first core surface a second spray-coated insulating film having a pencil hardness of between 3H and 6H.
A method for preparing a motor core coated with a multi-layer insulating film, the method comprising:
- (a) coating a motor core, having first and second opposed surfaces, with an electrodeposited coating film;
- (b) placing the electrodeposition-coated core upon a coating tool;
- (c) applying, to an outer portion of a first surface of the electrodeposited film, a first spray-coated insulating film having a pencil hardness of between 2H and 4H;
- (d) turning the core over upon the coating tool to expose the second, opposed surface of the core;
- (e) applying, to an outer portion of a second surface of the electrodeposited film, a first spray-coated insulating film having a pencil hardness of between 2H and 4H;
- (f) turning the core over upon the coating tool to expose the first surface of the core;
- (g) applying, upon an outer portion of the first spray-coated insulating film on the first core surface, a second spray-coated insulating film having a pencil hardness of between 3H and 6H;
- (h) turning the core over upon the coating tool to expose the second surface of the core;
- and
- (i) applying, upon an outer portion of the first spray-coated insulating film upon the second opposed core surface, a second spray coated insulating film having a pencil hardness of between 3H and 6H.
Dependencies are inferred from the claim text.