METHOD AND DEVICE FOR APPLYING COATING ON ONE AND/OR BOTH SIDES OF METAL SUBSTRATE IN FORM OF STRIP

FIELD: metallurgy.SUBSTANCE: group of inventions relates to a device for applying a coating on one or both sides of a metal substrate in the form of a strip, as well as to a method of applying a coating on both sides of the substrate in the form of a strip. Device (1) for applying coating on one or both sides of metal substrate (2) in form of a strip comprises at least one guide device (3) for guiding substrate (2) in form of a strip along a given path of movement during application of coating, at least one first coating device (5) for coating a first base side (6) of substrate (2) in the form of a strip with electrostatically charged powder (8) of the coating, which is stored in a fluidised form in first reservoir (7), wherein first reservoir (7) is located in the geodetic relation below the first section of the trajectory of motion. Device also comprises at least one second coating device (9) for coating second base side (10) of substrate (2) in form of a strip with electrostatically charged powder (8) of coating, stored in a fluidised form in second reservoir (11), wherein the second coating device (9) relative to the direction of movement of strip-like substrate (2) along the path is located after the first coating device (5), and at least one deflecting device (12) for deflecting substrate (2) in the form of a strip, located relative to the path of movement between the first covering device (5) and second covering device (9), wherein first trajectory section by means of deflecting device (12) passes into second section of movement trajectory, wherein deflecting device (12) is configured to deflect substrate (2) in the form of a strip so that strip-like substrate (2) in the second trajectory portion moves opposite to strip-like substrate (2) in a first path portion, and second reservoir (11) is located in geodesic relation below second section of trajectory. Device comprises at least one measuring device (21, 22) for non-contact measurement of thickness of coating obtained by means of corresponding coating device (5, 9), wherein measuring device (21, 22) is located after corresponding covering device (5, 9), wherein at least one of coating devices (5, 9) is located at least one stabilizing roller (16, 17), which is configured to change the tensile stress and/or positioning substrate (2) in the form of a strip, and at least one control device (23), which is connected to measuring device (21, 22) and is configured to control operating mode, and/or positi