Coating tool for applying a fluid film onto a substrate

Details Coating tool for applying a fluid film onto a substrate Coating tool for applying a fluid film onto a substrate

B - Operations, Transporting

05

C

B05C 5/02 (2006.01) B29C 47/14 (2006.01)

Patent

CA 2734006

The invention relates to a coating tool for applying a fluid film onto a substrate, wherein disposed upstream of a slot nozzle (1) for producing a fluid film, said nozzle extending substantially across the entirety of a first width (B1) of the coating tool in unbroken fashion, is a distribution space (7) for distributing the fluid over a second width (B2) of the slot nozzle (1), wherein at least one channel (6) for feeding fluid is provided upstream of the distribution space (7), said channel having a third width (B3), and wherein the third width (B3) is smaller than the second width (B2). To avoid an uneven throughput of material across the width of the slot, it is proposed according to the invention that a plurality of feed channels (9) be disposed in the distribution space (7), said channels having a cross sectional area that increases in the direction of flow (S).

L'invention concerne un outil de revêtement pour l'application d'un film de liquide sur un substrat. Dans ledit outil, en amont d'une buse à fente (1) s'étendant de façon continue sensiblement sur une première largeur totale (B1) de l'outil de revêtement et destinée à produire un film de liquide, un espace de répartition (7) sert à répartir le liquide sur une deuxième largeur de la buse à fente (1), au moins un canal (6) présentant une troisième largeur (B3) et destiné à amener du liquide étant situé en amont de l'espace de répartition (7), et la troisième largeur (B3) étant inférieure à la seconde largeur (B2). Selon l'invention, afin d'éviter un débit massique non uniforme sur la largeur de la fente, une pluralité de canaux d'amenée (9) à surface de section transversale augmentant dans le sens d'écoulement (S) est disposée dans l'espace de répartition (7).

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