| 摘要 |
PROBLEM TO BE SOLVED: To surely obtain molded products having the same quality even in the case of multi-cavity molding and to prevent formation of defective molded products by injecting after confirmation of almost the same gas as the gap at the time of casting of a molded product in the good mold clamping condition. SOLUTION: After completing the clamping process of the dies 2, 4, the gapΔa between the joining surfaces of the dies 2, 4 corresponding to plural pieces of die cavity parts 3, is measured. When the gapΔa deviates from a preset allowable range, the die clamping force of a clamping cylinder 10 for the dies is corrected and the dies are reclamped. Then, after confirming that the gapΔa is in the preset allowable range, the injection process of molten metal into a cavity 3 in the dies in executed. By this method, the unevenness in filling behavior of the molten metal into each cavity in the dies at each shot, is eliminated and the quality of the formed product in each shot is stabilized without any variation, and the qualities of plural pieces of formed products in the same shot are uniformized.
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