| 摘要 |
PURPOSE: A die casting method is provided to minimize assembly and working man-hour of dies by casting the product shape part using casting of the die part as a lower mold during fabrication of dies in which a die part and a product shape part are formed of dissimilar castings. CONSTITUTION: The die casting method comprises first step (S10) of fabricating a part except a product shape part and a rib part as casting pattern of a die part; second step (S20) of fabricating casting of the die part to form the part except the product shape part and the rib part by injecting molten cast iron into the casting pattern of the die part; third step (S30) of fabricating casting pattern of the product shape part using casting of the die part as a lower mold; fourth step (S40) of setting the casting pattern of the product shape part fabricated in the third step (S30) on the casting of the die part; fifth step (S50) of fabricating casting of the product shape part to form steel of the product shape part by injecting molten cast steel into the casting pattern of the product shape part set on the casting of the die part in the fourth step (S40); and sixth step (S60,S70) of completing dies by precision machining casting of the die part and casting of the product shape part that are formed of cast iron and cast steel after cooling the casting of the die part and casting of the product part for a certain period of time.
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