There are two types of wire rod coaters (also known as coating rods ), one is a wire-wound wire rod coater, and the other is an extrusion-type wire rod coater, both of which are the same in application , can be used instead, but there are still some differences in the working principles of the two.
The wire-wound wire rod coater winds steel wires of different diameters on a steel rod of a specific diameter, and the film thickness control of the wire-wound coating rod is mainly controlled by the difference in the diameter of the wound steel wire.
Extrusion-type wire rod coater uses cold extrusion process to extrude continuous grooves of different sizes on a smooth steel rod, and controls the thickness of the coated wet film through the different sizes of the grooves.
Theoretically, there is no difference between the wire-wound rod and the forming rod for scraping samples, but because the grooves formed by the two are different, the amount of sample coating required for the film coating is different. The wire-wound rod follows the Mayer-Bar principle better, and the forming rod is easier to clean.
