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Scrap Retention Reverse Taper Button Dies -Headed Type-



With scrap retention button dies, 2 or more slanted grooves are machined on the inner surface of the die. The scrap initially punched out during the punching process forms small projections along the slanted grooves in the die. When the punching process pushes this scrap farther down to the bottom, the projections become compressed by the sides of the die ("ironing" effect), preventing scrap lifting from occuring.


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