An apparatus for measuring wear of paper slitting blades

Abstract A laboratory apparatus for measuring wear of rotary paper slitting blades of the Koegel type is described. There is provision for adjusting blade setting parameters and for running the blades in contact with paper dust. Wear at blade tips is measured in situ using a mechanical profilometer. It is shown that the initial rates of wear are very high and the extent of wear at the tips of top and bottom blades differ. The wear of a pair of slitter blades is measured using the concept of open cut distance and, for 70 g m −2 paper, loss of cut quality occurs when open cut distance increases to 350 μm