GATE-CUTTING METHOD AND GATE-CUTTING DEVICE

PROBLEM TO BE SOLVED: To provide a gate-cutting method capable of preventing an occurrence of a defective cutting.SOLUTION: A gate-cutting method includes: a preparation step S1 for preparing a molding M having a useful part P and an unnecessary part U which is connected to the useful part P through...

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Bibliographische Detailangaben
Hauptverfasser: MOCHIZUKI REO, YAMAGISHI HIROYUKI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a gate-cutting method capable of preventing an occurrence of a defective cutting.SOLUTION: A gate-cutting method includes: a preparation step S1 for preparing a molding M having a useful part P and an unnecessary part U which is connected to the useful part P through a gate G having a notch NT; a holding step S3 for holding the molding M on a holder 10; and a separation step S5 for separating the useful part P from the molding M. In the separation step S5, the useful part P is pressed against a first and a second projection 22, 23 from the opening end OE side to bend the gate G and the useful part P is pressed against a brush 27 from a closing end CE side to bend the gate G, thereby cutting the gate G from the notch NT as a starting point. The opening end OE side is a side of which the notch NT opens at the gate G and the closing end CE side is opposite to the opening end OE side.SELECTED DRAWING: Figure 10 【課題】切断不良の発生を抑制できるゲートカット方法を提供する。【解決手段】ゲートカット方法は、有用部Pと、切込みNTを有するゲートGを介して有用部Pに連結された不要部Uと、を有する成形品Mを準備する準備工程S1と、成形品Mを保持台10に保持する保持工程S3と、成形品Mから有用部Pを分離する分離工程S5と、を備え、分離工程S5は、開口端OE側から第1及び第2の突起22,23を有用部Pに押し当てて、ゲートGを折り曲げることと、閉塞端CE側からブラシ27を有用部Pに押し当てて、ゲートGを折り曲げることで、切込みNTを起点としてゲートGを切断することと、を含み、開口端OE側は、ゲートGにおいて切込みNTが開口する側であり、閉塞端CE側は、開口端OE側の反対側である。【選択図】 図10