Reliance Electric Industrial Company

James B Keys

Sidney Bell

James L Thigpen

David T McKinney

Walter G Stiffler

There is disclosed a method and apparatus for coating an electromagnetic coil, particularly stator coils for an electric motor, with an insulating catalyzed resin material. The catalyzed resin material is a two component material comprising an epoxy resin and a catalyst. The catalyzed resin material is a free flowing liquid at a first temperature and begins to cure rapidly at a second elevated temperature. The stator coils are first heated by supplying current to the stator coils to raise the temperature of the stator coils to the first temperature. The free flowing liquid catalyzed resin material is dispensed through nozzles onto the stator coils as the stator coils and the nozzles move relative to each other. After the liquid catalyzed resin material has been dispensed in a predetermined amount, at predetermined locations, for predetermined times, the catalyzed resin material is allowed to penetrate the stator coils. The temperature of the stator coils is then raised to the second temperature at which the curing of the catalyzed resin material occurs rapidly. As the curing continues, heat is produced by the curing process, and the current to the stator coils is shut off at a predetermined temperature.

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Oakwood, GA, United States of America

James B Keys