Two main factors end a mayer rod’s service life. It is vital to tell them apart and identify which affects your process more.
With decades of experience, Buschman supports paper mills, board mills and converting plants in meeting their coating goals. We design custom groove profiles for challenging applications, and work closely with you to optimise designs for maximum performance and life.
We have seen many facilities discard supposedly “worn” rods that showed little or no physical wear — the grooves were simply clogged with coating residue.
During normal operation, metering rods are subjected to friction, abrasives, heat, and other factors that cause the rod to physically wear. In these cases, the crests of the threads are actually worn down
Rod contamination occurs when dried coating and other debris becomes lodged in the thread. As the root of the thread fills with debris
In any operation, physical wear and contamination have the same effect: they reduce the groove’s open volume, lowering the coating weight applied.