Abstract
In this paper, we describe a pushing-cut process using multiple pieces of a white-coated cardboard. In the cutting process of cardboards such as post cards, the cutting quality on wedged cardboards is empirically known to be affected by the piled-up pieces of the cardboards, friction coefficient, the thickness of the coated layer, the blade tip profile and other factors. In this work, the effects of mechanical conditions on the cardboard cutting characteristics were experimentally investigated by varying blade apex angle, the surface roughness of the blade, tip thickness and the number of piled-up pieces of cardboard. The following experimental results were obtained: (1) the breaking down and local minimum point of cutting line force were characterized using blade apex angle and tip thickness; (2) the position of the peaked line force for each layer depended on the number of piled-up pieces and its order; (3) an apex angle less than 42 degree is stable for the release of the breakdown layer, whereas an apex angle larger than 53 degrees is in a fairly sticky state and unstable for such release.
