Method and coating device for coating a metal strip

A method for coating a metal strip with the help of a coating device, in which the metal strip is led through a coating container with a liquid coating medium, subsequently through a slot of a stripping nozzle device and further subsequently through a slot of a strip stabilizing device with a plurality of magnets on both wide sides of the strip, comprising the following steps:

• determining an actual shape of the metal strip within the stripping nozzle device over a width of the metal strip;
• determining a shape regulation difference as a difference between the actual shape of the metal strip and a predetermined target shape of the metal strip in a region of the stripping nozzle device;
• and
• controlling the plurality of magnets of the strip stabilizing device as setting elements so that the actual shape of the metal strip is converted into the target shape of the strip,
• wherein controlling the plurality of magnets of the strip stabilizing device is carried in that at least one of the magnets in dependence on the shape regulation difference in a width direction (R) of the metal strip is displaced relative to at least one of the magnets on the opposite wide side of the metal strip and displaced into a moved position where it is at least approximately opposite a trough in the actual shape of the metal strip.

A coating device for coating a metal strip with a liquid coating medium, comprising:

• a coating container filled with the liquid coating medium;
• a stripping nozzle device;
• a strip stabilizing device with a plurality of magnets on the two wide sides of a slot of the strip stabilizing device;
• at least one sensor for detecting the actual shape and/or or the actual position of the metal strip in the slot of the stripping nozzle device;
• and
• a control device for determining a shape regulation difference as a difference between the actual shape of the metal strip and a predetermined target shape of the metal strip in a region of the stripping nozzle device and for controlling the magnets by way of a magnet actuator,
• wherein the control device and the magnet actuator are further constructed to offset at least one of the magnets in dependence on the shape regulation difference in width direction of the metal strip relative to at least one of the magnets on an opposite wide side of the metal strip and displace it into a moved position where it is at least approximately opposite a trough in the actual shape of the strip.