| 摘要 |
PURPOSE: To provide a mold for vacuum suction deep drawing in which a sheet is press-formed into a cup shaped product by one pressing of the mold for deep drawing. CONSTITUTION: The mold for deep drawing (1) comprises an upper mold (3) fixed to a slide part (2) at the upper side of press, and a lower mold (5) fixed to a bolster (4) on a lower part of the press, wherein the upper mold comprises guide pins (6) an upper part of which is fixed onto a gas spring holder (8) fixed to an upper holder (7) by a guide pin holder (9), push punches (11) and guide punch (12) are installed at the gas spring holder by a punch holder (10), an airtightness stripper (13) for maintaining airtightness during contact of the upper mold and the lower mold is installed on a lower part of the punch holder in such a way that the airtightness stripper is supported to cushion pins (16) and elastically lifted and lowered from a guide block (17), wherein nitrogen gas spring (14) and pad (15) are installed between the cushion pins, a seal packing (19) is inserted into connection hole (18) of the guide punch of the airtightness stripper, a seal packing (20) is installed on the upper surface of a die block (22) in which a die (21) of the lower mold is installed so that the die block maintains airtightness when the seal packing is connected with the airtightness stripper, a vacuum piston (23) having a seal packing (23a) is elastically supported by an ejector spring (24a) on a lower part of the die, a lower part of an ejector pin (24) is caught on the vacuum piston so that the ejector pin and the vacuum piston are interlockingly lifted and lowered, and a seal packing (26) for maintaining air tightness is inserted onto the inner circumferential part of connection hole (25) lifted and lowered with being connected to the ejector pin.
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