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AssigneeSuehiro Mizukawa
InventorsSuehiro Mizukawa, Toshinaga Urabe
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An automatic bending machine produces a steel rule punching die to be used for forming predetermined notch lines or fold lines in a paper strip, a sheet, a board member, or the like in production of a paper container or a corrugated box. The automatic bending machine has a bending tool 1 which bends a band blade 12 into a predetermined shape. In the machine, a diamond grinder 20 which is laterally and vertically moved by a computer control is disposed in front of the bending tool 1. When the bending tool is combined with the diamond grinder, bending of the band blade, linear cutting of the both ends, nicking of a blade edge, bridging (notching) of a blade bottom, and broaching (slotting) of a blade side wall are enabled.
An automatic bending machine for a steel rule punching die, comprising a bending tool (1) which bends a band blade (12) into a predetermined shape, wherein a diamond grinder (20) which is laterally and vertically moved by a computer control is disposed in front of said bending tool (1).
A steel rule punching die wherein said die comprises a groove (122) which is cut in a side wall of a receiving band blade (132), and a notch (133) in a lower portion of said groove, and an end portion (131a) of a butting band blade (131) comprising:
A steel rule punching die in which an end portion of a butting band blade (131) butts against a groove (122) which is cut in a side wall of a receiving band blade (132) to be joined at a predetermined inclination angle, wherein an end portion of said butting band blade (131) is formed into a shape cut in a Z-like section shape having a groove bottom face (161C), a groove side face (161D) which intersects with one end of said groove bottom face (161C), and a projection end face (161E) which intersects with another end face of said groove bottom face (161C).
Dependencies are inferred from the claim text.