To provide a Mg alloy precision pressure-forming method and its forming apparatus, and an Mg alloy formed product produced by using this method with which such defects are eliminated that the thin parts are difficult to densely cast without developing surface folds or cavities and thus, the strength defective is actually very high in the conventional technique, and to provide a formed product reducing the surface roughness, the cavities, etc., increasing the strength and having little surface roughness by compressing even in the thick parts in the casting of the Mg alloy with a die casting.
A primary die clamping is performed at low pressure into the state setting the thickness greater by about 0.1-20% than the thickness of the product by utilizing the clamping force of the forming machine. After pouring the molten Mg alloy into a cavity, single or more times of secondary die clampings are performed at high pressure and the product is compressed or forged to produce the formed product of the Mg alloy.
MATSUMOTO SHIGEFUMI
MATSUMOTO MANABU
MATSUMOTO SHIGEFUMI
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