Pressure feed coating application system

B - Operations – Transporting – 05 – C

Patent

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Details

B05C 1/08 (2006.01) B05C 3/18 (2006.01) B05C 3/12 (2006.01) B05C 9/04 (2006.01)

Patent

CA 2332365

The present invention is a device and a method of applying a coating to a web. The device comprises a feed nozzle (2) coupled to stiffener (11) coupled to a spring (30) coupled to a feed nozzle slide position/force adjuster (17). The feed nozzle (2) comprises a fluid reservoir (12), a feed pipe (6), a metering surface (4), end seals (27) and a back seal (3). The stiffener spring, as the frame deflects and polymer covered rolls deform, permits the rotation of the feed nozzle (2) so a proper geometry is maintained, permitting increased control and a wider film thickness control range for a specific nozzle shape. This device permits greater film thickness control, ability to process at much higher speeds than currently achievable, and a wider range of film thickness. This device permits coatings to be applied at much wider ranges of rheological characteristics. Coatings can be applied at higher percent solids with improved characteristics.

L'invention concerne un dispositif et un procédé permettant d'appliquer un revêtement sur une bande. Le dispositif comprend une buse d'alimentation (2) couplée à un raidisseur (11), lequel est couplé à un ressort (30), lui-même couplé à un dispositif de réglage (17) de force/position de buse d'alimentation coulissant. La buse d'alimentation (2) comprend un réservoir à fluide (12), un tuyau d'alimentation (6), une surface de dosage (4), des joints d'étanchéité d'extrémité (27) et un joint d'étanchéité arrière (3). Lorsque le cadre dévie et les rouleaux recouverts de polymère se déforment, le ressort de raidisseur permet de faire tourner la buse d'alimentation (2), de manière à maintenir une géométrie appropriée, ce qui assure une régulation accrue et une plage de contrôle d'épaisseur plus grande pour une forme de buse spécifique. Ce dispositif permet d'appliquer des revêtements sur des plages beaucoup plus grandes de caractéristiques rhéologiques. On peut appliquer des revêtements à des pourcentages élevés de matières solides.

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