Bead mold for metal gasket press progressive die

摘要

PURPOSE:To allow the hole punching, the bead forming and the outer shape punching for the metallic gasket with the progressive feeding of the metallic blank sheet by additionally providing the stripper at the outer periphery of the base plate in the periphery of the upper side bead. CONSTITUTION:When the stripper 15 is set so as to be energized to the virtual line 15b position, that is, the press surface 11a level of the base plate 11 in the periphery of the upper bead with the spring 18, and on the initial stage of the press operation, the metallic blank sheet 10 is clamped in being pressed with the stripper 15 and the die 16, the plate sheet part 10c in the periphery of the bead is brought in pressurized contact with the press surface 11a of the base plate 11 of the upper side bead periphery. On the following operation, the bead 10a part is alternately applied with the plane pressure of upward and downward with the press surface 16a of the die 16 along the width of the step groove 11b and the press surface 11a of the base plate 11 of the outside of periphery of the upper side bead, the bead 10a is formed. In such a way, an irregular part of wrinkle, etc., is not generated at the plate part 10d of the outside of periphery of the bead.