PURPOSE: To surely and easily produce a cast product having high strength and high quality without developing hot tearing and shrinkage hole by filling molten metal for casting into a cavity in a die and pulsatively applying the pressurizing force to the solidifying molten metal.
CONSTITUTION: A male die 3 is fitted to a female die 1 to form the die having the cavity 2, 6, and the molten metal 13 is poured from a molten metal pouring device 10. Successively, to the solidifying molten metal 13, the high hydraulic pressure from an actuator 12 fitted at the lower part and the comparatively low hydraulic pressure compared with this high pressure are pulsatively (e.g. about 0.5-1000Hz frequency) and mutually acted. By this method, equi-axed crystals are developed in the whole inner part in the cast product and only equi-axed crystal zone is formed, and the high quality cast product having high strength and toughness without developing the hot tearing and shrinkage hole is obtd.
| JP2686552 | [Title of Invention] Molding Mold |
ADACHI MITSURU
YAMAMOTO NAOMICHI
