| 摘要 |
PROBLEM TO BE SOLVED: To reduce an operation by discontinuing the conventional beating operation with a beating rod in the dismantling of a core in an aluminum die casting die. SOLUTION: A movable die 20 is composed of a die base 21 and a core 25 inserted into its recessed part 22 for a core, and the core 25 is fixed to the die base 21 freely attachably/detachably with a fixed bolt 26. The space between the core 25 and the die base 21 is provided with core extrusion springs 30, and the core 25 is always energized so as to be extruded by repulsive force owing to compression upon fixing. COPYRIGHT: (C)2007,JPO&INPIT
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