PURPOSE: To improve the yield and to obtain the whole chilled structure of a casting by casting molten metal containing the specific component into a metallic mold having the specific thermal conductivity under the specific condition.
CONSTITUTION: The molten metal containing 3.0-3.8% C, 1.5-2.5% Si is cast by using the water cooled copper alloy metallic mold made of the copper alloy material having 0.2-0.8cal/cm.sec.°C the thermal conductivity. As condition of the casting, the pouring of molten metal is started at 170-190°C the metallic mold temp. raises to 200-250°C, water pouring to the metallic mold is started. The metallic mold temp. further raises in little and reaches to the peak and starts, to drop, and when the metallic mold temp. reaches to 210-250°C, the water pouring to the metallic mold is temporarily stopped. After passing the fixed time, the water pouring and interruption of the water pouring are repeated and dropping curve of the metallic mold temp. is finely adjusted, and when the metallic mold temp. reaches to 170-190°C, the casting is taken out from the metallic mold.
| JP4663508 | Mold repair method |
| JP6976354 | Mold |
ANDO YUKIICHI
NAKAMOTO IKUHIKO
