| 摘要 |
A die-casting mold with an improved structure is provided to effectively form a metal article having an undercut portion through die-casting by constructing the die-casting mold in an inexpensive and simple structure. In a die-casting mold comprising a fixed die(40), a movable die(50), and an ejecting unit(60), the die-casting mold further comprises: undercut forming cores(100) having undercut forming parts(101) for forming an undercut portion on a metal article in a way that the under cut portion is projected in a cross direction(D2) crossing a reciprocating direction(D1) of the movable die; and a linkage unit for moving the undercut forming cores in the cross direction to slide out the undercut forming parts from the undercut portion in a state that the linkage unit is linked to a moving operation of the ejecting unit when the ejecting unit approaches the movable die, wherein the linkage unit comprises: guide rails(110) installed on the ejecting units to support the undercut forming cores such that the undercut forming cores are slidable in the cross direction relative to the ejecting unit; and guide blocks(120) which are installed on the movable die, and into which inclined cam holes(121) are penetrated in a direction inclined relative to the reciprocating direction of the movable die such that the undercut forming cores are slidingly inserted into the inclined cam holes in the penetrating direction of the undercut forming cores, and wherein the undercut forming cores slide in the cross direction relative to the ejecting unit while the undercut forming cores are guided by the inclined cam holes of the guide blocks when the ejecting unit moves in a direction that the ejecting unit approaches the movable die.
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