Method and apparatus for coating substrates using an air knife

Details Method and apparatus for coating substrates using an air knife Method and apparatus for coating substrates using an air knife

B - Operations, Transporting

05

D

B05D 1/34 (2006.01) B05C 5/00 (2006.01) B05C 9/06 (2006.01) B05C 11/06 (2006.01) B05D 1/30 (2006.01) B05D 3/04 (2006.01) D21H 23/48 (2006.01) D21H 25/16 (2006.01)

Patent

CA 2209945

The method of coating a substrate (32, 102) with plurality of layers of coatings includes moving the substrate along a path through the coating station including a coating die (10, 110). A composite layer (48, 118) is formed of first and second coating fluids (34, 36; 104, 86). The substrate (32, 102) contacts the flowing composite layer to interpose the first coating fluid (34, 104) between the substrate (32, 102) and the second coating (36, 86). The composite layer is doctored with a gas (52, 122) from a gas knife (54, 124) to remove some portion of the composite layer from the substrate.

Méthode servant à appliquer plusieurs couches de revêtement sur un support (32, 102), selon laquelle le substrat suit un trajet qui passe par un poste d'enrobage équipé d'une filière plate pour enrobage (10, 110). Une couche composite (48, 118) est formée d'un premier et d'un deuxième fluides d'enrobage (34, 36; 104, 86). Le support (32, 102) entre en contact avec le fluide d'enrobage en écoulement afin que le premier fluide d'enrobage (34, 104) se situe entre le support et le deuxième fluide d'enrobage (36, 86). La couche composite est soumise à un traitement au gaz (52, 122) à l'aide d'un couteau à gaz (54, 124), qui enlève une portion de la couche composite du substrat.

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