Method and apparatus for two-coat one-fire electrophoretic enameling of a metallic work piece
AssigneeMiele & Cie. KG
InventorsKarl Wiengarten, Mario Sprickmann
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Abstract
A method and apparatus for two-coat one-fire electrophoretic enameling of a work piece made of metal, wherein a first undercoat enamel slip deposit bath is followed by at least one excess slip removing bath before the undercoated work piece is submerged in a process bath including an additive for reducing the electrical resistance of the enamel biscuit followed sequentially by another rinsing bath, a finish enamel coating bath and not less than one final rinsing bath before the coated work piece is subjected to an enamel firing step.
Claims20
A two-coat one-fire apparatus for electrophoretically depositing a uniform coat of enamel on a metallic work piece, comprising:
- enamel slip containing means for electrophoretically depositing an undercoat enamel biscuit of a desired electrical resistance on the work piece;
- means for reducing the electrical resistance of the enamel biscuit of the work piece;
- means for electrophoretically depositing a finish enamel coat on the undercoated work piece;
- and
- means for firing the undercoat and finish enamel coat on the work piece.
A two-coat one-fire method of electrophoretically depositing a uniform coat of enamel on a metallic work piece, comprising:
- a first step of electrophoretically depositing from an enamel slip an enamel undercoat of a desired electrical resistance on the work piece;
- a second step of reducing the electrical resistance of the enamel undercoat;
- a third step of electrophoretically depositing a finish enamel coat on the undercoated work piece;
- and
- a fourth step of subjecting the undercoat and the finish enamel coat on the work piece to firing.
Dependencies are inferred from the claim text.