摘要 |
<p>The present invention relates to a device for controlling the thickness of a coating made of a liquid film on a moving strip (3), comprising a nozzle (1) fed with a pressurized fluid (6) in a chamber (2) of the nozzle, said chamber (2) being terminated by nozzle lips (11) making an elongated discharge opening (12) for discharging the pressurized fluid onto the moving strip (3), said chamber (2) comprising also a perforated baffle plate (8) obstructing a cross-section L x h of the chamber (2) in the fluid flow, characterised in that the perforated baffle plate (8) has a number of holes (13) so that the total surface of said holes (13) is higher than 90% of said cross-section and has a thickness Th higher than 3 times the individual diameter of any of said holes (13) and higher than 3 mm.</p> |