Device for blowing off coating material in the coating of...

C - Chemistry – Metallurgy – 23 – C

Patent

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C23C 2/20 (2006.01)

Patent

CA 2088591

The invention relates to a device for blowing off excessive coating material, especially fluid zinc or aluminium, in the coating of metal bands. The device comprises a blowing off jet impinged on compressed air, of which the jet bodies. 3,4 are fixed at a base body 1. The jet lips 3,4 adjustable against each other form a jet slit 10 extending in transverse direction of the metal band. For optimizing an adaption of the slit thickness respectively the pressure of the blowing off medium along the band width it is provided to build the blowing off jet as a jet row, providing in transverse direction of the band at least two partial jets 2 to impinge seperately on a blowing off medium, especially compressed air, sealed against each other , of which the respective partial slits are adjacent forming a continuous jet slit (10).

Un dispositif permet d'éliminer par air soufflé l'excédent en matériau de revêtement, notamment du zinc ou de l'aluminium liquides, lors du revêtement de bandes métalliques. Le dispositif comprend une tuyère alimentée par de l'air comprimé dont le corps (3, 4) est assujetti à un corps de base (1). Les lèvres (3, 4) mutuellement ajustables de la tuyère forment une fente (10) transversale par rapport à la bande métallique. Afin d'obtenir une adaptation optimale de la largeur de la fente ou de la pression du milieu soufflé sur toute la largeur de la bande, la tuyère est formée d'une rangée de tuyères. Au moins deux tuyères partielles (2) mutuellement isolées et séparément alimentées par un milieu soufflé, notamment de l'air comprimé, sont agencées transversalement par rapport à la bande, leurs fentes partielles étant adjacentes de manière à former une fente continue (10).

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