| 摘要 |
An operation method of an upper die in permanent mold casting device in which die opening of the upper die can be carried out stably. In the operation method of an upper die for a lower die in a permanent mold casting device for producing a casting product by pouring molten metal in a holding furnace into a die consisting of upper and lower dies through a stalk, a die open/close mechanism fixed to an elevating/lowering frame has an upper die elevating/lowering means performing die matching and die separation by elevating/lowering the upper die fixed to a lower portion with respect to the elevating/lowering frame and the lower die, and setting of a core in the upper and lower dies and formation of a space for taking out the product are performed by elevating the upper die elevating/lowering means with respect to the elevating/lowering frame and elevating the elevating/lowering frame with respect to the lower die. Molten metal is poured under a state where the elevating/lowering frame to which the die open/close mechanism having the upper die is fixed is secured with respect to the lower die, and then the upper die elevating/lowering means is operated while sustaining the secured state thus separating the upper die from the lower die.
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