Slitter-scorer apparatus

A slitter-scorer apparatus configured to give slit lines and score lines in a stream of continuous corrugated paperboards being fed in a feed direction, the stream of continuous corrugated paperboards being cut into individual corrugated paperboards after the stream of continuous corrugated paperboards is given the slit lines and the score lines, the slitter-scorer apparatus comprising:

• a corrugated paperboard-processing tool comprising a plurality of slitters arranged in parallel in a width direction orthogonal to the feed direction and configured to give the slit lines in the stream of corrugated paperboards along the feed direction, and the corrugated paperboard-processing tool further comprising a plurality of scorers arranged in parallel in the width direction and configured to give the score lines in the stream of corrugated paperboards along the feed direction;
• width directional movement mechanisms provided, respectively, in the plurality of slitters and the plurality of scorers and configured to move the plurality of slitters and the plurality of scorers in the width direction;
• up-down directional movement mechanisms provided, respectively, in the plurality of slitters and the plurality of scorers and configured to move the plurality of slitters and the plurality of scorers in an up-down direction;
• and
• a controller configured to control the width directional movement mechanisms and the up-down directional movement mechanisms, upon a receipt of an order change by the controller, to reposition the slit lines and the score lines in the stream of corrugated paperboards in such a manner as to:
• set a target setup time to complete repositioning of the plurality of slitters and the plurality of scorers of the corrugated paperboard-processing tool in the width direction and the up-down direction to meet the order change, based on a cutoff length and a feed speed of the stream of corrugated paperboards, wherein the cutoff length is a length measured in the feed direction that is cut off from the stream of corrugated paperboards to remove a portion of the stream of corrugated paperboards, wherein the slit lines and the score lines are repositioned over the length to meet the order change;
• set a target acceleration/deceleration according to which the plurality of slitters and the plurality of scorers of the corrugated paperboard-processing tool need to be repositioned to meet the order change, wherein the target acceleration/deceleration is set to complete repositioning of the plurality of slitters and the plurality of scorers of the corrugated paperboard-processing tool within the target setup time;
• and
• control the width directional movement mechanisms and the up-down directional movement mechanisms to reposition the plurality of slitters and the plurality of scorers of the corrugated paperboard-processing tool at the target acceleration/deceleration.