SLAG RISE PREVENTING METHOD, AND PUNCH MOLD

摘要

Provided are a slag rise preventing method at the time when a plate-shaped work (W) is punched by the coaction between a punch mold (1) and a die mold (25), and a punch mold. In the slag rise preventing method, the work is pushed onto the upper face of the die mold by a plate holder (7) belonging to the punch mold. A portion of the work is pushed into a die hole (27) in the die mold by a punch blade portion (13) belonging to the punch mold. At the rising time of the punch blade portion (13) when the punch blade portion is positioned on the upper side of the lower face of the work and on the lower side of the upper face of the work, a liquid is blown in a large quantity from a hole portion already formed in the work toward the lower side of the punch blade portion (13), thereby to drop small pieces of slag positioned on the lower side of the punch blade portion, into the die hole (27).