TRIMMING DIE FOR CARDBOARD SHEET AND PUNCHING METHOD FOR CARDBOARD SHEET

摘要

To provide a trimming die for a cardboard sheet capable of omitting a step for removing whisker-like offcuts by cutting and separating the whisker-like offcuts remaining on a cut end surface of a punched blank at the same time when punching the punched blank to be a cardboard product.SOLUTION: A trimming die for a cardboard sheet 16 includes blades 20 for blank punching arranged in a frame shape on one surface 22. Edges of the blades 20 for blank punching protrude from one surface 22 to a first prescribed height in accordance with thickness of a cardboard sheet S, has a plurality of blades 26 for cutting whisker-like offcuts that extend inward the frame shape from one side at regular intervals so that they can cut the whisker-like offcuts that can occur to a core of a cut end surface of the blank. The respective blades 26 for cutting whisker-like offcuts are provided apart from the blank punching blades 20 and protrude from one surface 22 to a second prescribed height.SELECTED DRAWING: Figure 1