ROTARY DIE CUTTER AND SHEET PROCESSING METHOD

• Main Author: NAKAMURA TOMOYASU
• Format: Patent
• Language: English; Japanese
• Published: 21.06.2023
• Subjects: CUTTING; CUTTING-OUT; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING,CUTTING-OUT, STAMPING-OUT OR SEVERING; HAND CUTTING TOOLS; PERFORATING; PERFORMING OPERATIONS; PUNCHING; SEVERING; SEVERING BY MEANS OTHER THAN CUTTING; STAMPING-OUT; TRANSPORTING

To protect a tip extending in a lengthwise direction of a processing tool which firstly contacts a sheet when punching and creasing the sheet on a die board of a rotary die cutter.SOLUTION: A rotary die cutter comprises a hard pressing component 13 on a peripheral surface of a die board 10. The pressing component has a length in a circumferential direction of a die roll 1, contacts an anvil roll 2, and presses the anvil roll 2 within a play range of a bearing supporting a shaft of the anvil roll and in a direction orthogonal to the shaft, thereby increasing a distance between the die roll 1 and the anvil roll 2. A front end of the pressing component 13 is positioned at a part contacting the anvil roll 2 until an initial processing tool 121 reaches a point at which the same bites into a sheet S the most, and a rear end of the pressing component 13 is positioned at a part which is spaced forward from the initial processing tool 121 by a length exceeding a prescribed length of an end allowance Sg. In the state that the anvil roll 2 is affected by pressing by the pressing component 13, processing for the sheet S by the initial processing tool 121 is performed.SELECTED DRAWING: Figure 3 【課題】ロータリーダイカッターのダイボードでのシートの打抜・罫入加工に際し、シートに最初に当接する加工具において、その長さ方向に延びている先端部を保護する。【解決手段】ダイボード１０の周面に、ダイロール１の周方向に長さを有し、アンビルロール２に接して、アンビルロール２をその軸を支持する軸受の遊びの範囲内の大きさで、その軸に対して直交する方向へ押圧してダイロール１とアンビルロール２との間隔を拡大する硬質性の押圧部材１３を備え、押圧部材１３の前端を、初期加工具１２１がシートＳに最も大きく喰い込む点に至るまでにアンビルロール２に接する部位に位置させ、押圧部材１３の後端を、初期加工具１２１から前方へ端部代Ｓｇの所定長さを超える長さの間隔をあけた部位に位置させて、アンビルロール２に対して押圧部材１３による押圧の影響が及んだ状態で、初期加工具１２１によるシートＳへの加工が行われるようにする。【選択図】図３