Nozzles knife for controlling the coating thickness of a metal coating

摘要

The invention has for its object a device with a blade of air for regulating the thickness of a metal deposit formed on a band (b) at the output of a galvanisation bath (1) comprising at least one nozzle (l1, l2) for blowing a gaseous fluid, such as air, which is associated with a chamber (8) connected to a power supply circuit (7) with air and opening out into an opening (12) in the form of a slit extending transversely over the entire width of the band (b) and limited by two jaws (11a, 11b) slightly spaced apart to the formation of a stream of blown air between the jaws (11a, 11b) at the output of the chamber (8) and in the direction of the strip (b), & br / according to the invention, the device comprises means (15, 16) of dynamic adjustment of the width of said opening (12), the latter being limited on one side by a mobile lip, it is possible to adjust the deformation by means of jacks. & br / the invention applies particularly to installations for galvanizing.