MANUFACTURE OF SHUTTER MEMBER

摘要

PURPOSE:To manufacture a shutter member having a cross section of an approximately U-shape equipped on a cartridge in order that residual stress is relaxed and a space between both plate-like parts can stably be held. CONSTITUTION:A blank 4' of the shutter member 4 is punched by a blanking die 11 and a blanking punch 12 to form a development shape, and is then shaped into the cross section of an approximately U-shape by a bending die 13 and a bending punch 14. After bending inside both plate-like parts 4a and 4b of this blank 4' of the approximately U-shaped cross section, the blank 4' is shaped again into an approximately U-shape in the cross section by a setting die 15 and a setting punch 16 to obtain the shutter member 4.