Casting mold device and method producing cast

Abstract

The invention provides a casting mold device and a method for manufacturing castings using the casting mold device. The casting mold device includes a metal mold and a sand mold (2), wherein the sand mold has: a riser formed on the opposite side of the metal mold. One side; the opening (25), which is sealed by a metal mold to form a mold cavity when forming a mold; The surface of the surrounding wall protrudes more toward the metal mold side, wherein a notch is provided on the surrounding wall to make the inner part (S) of the surrounding wall communicate with the outer part. The casting method includes the following steps: a molding process, The sand mold and the metal mold are combined to form a mold cavity; the casting process is to pour molten metal into the mold cavity; the mold opening process is to leave the casting (7) on one side of the sand mold and separate the sand mold from the metal mold; and In the cooling step, the sand mold with the casting left is immersed in a cooling tank with the opening side positioned on the lower side. With this method, when the sand mold and casting are immersed in cooling water in the cooling process, air bubbles (X) remaining in the inner portion (S) are discharged through the notch portion (25), and cooling or quenching can be efficiently performed.

Description

technical field [0001] The present invention relates to a casting mold device combining a metal mold and a sand mold and a casting method using the casting mold device. Background technique [0002] Conventionally, methods of forming a casting mold device by combining a metal mold and a sand mold, and performing casting using this are well known. Such a molding device is the one disclosed in Japanese Patent No. 3068185. This publication shows that if this device is used, when the molten metal is poured into the mold cavity formed in the mold device, the molten metal in solidification is quickly and continuously removed by the metal mold constituting the mold device. The solidifying molten metal creates large thermal gradients and directional solidification of the entire casting is achieved. [0003] In addition, since the above-mentioned thermal gradient is generated, compared with the casting method using a sand mold, the casting method usi...

AI Technical Summary

Problems solved by technology

However, the molten metal is not sufficiently solidified in the riser formed on the upper part of the sand mold, so if the posture is changed, unsolidified molten metal may flow out.

And by changing the posture, the shape of the riser portion will change, and when the riser portion is positioned and cut off, the inconvenience of not being able to perform a stable cutting operation occurs.

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