| 摘要 |
The present invention relates to a method of molding a low-melting-point metal alloy. In this method, a remaining semisolid material at the end of molding is heated to a liquidus temperature or higher to be melted. Then an injection of the material is performed in a perfectly molten material state to discharge it from a heating holding cylinder. Heating is stopped and a molding operation is finished. A discharge of a remaining semisolid material is made while supplying a metallic raw material having the same composition as the molding material. A temporary suspension of molding is performed after the temperature of the heating holding cylinder is increased to a liquidus temperature or higher and an accumulated semisolid material is in a perfectly molten material state. At the resumption of molding, the temperature of the heating holding cylinder is lowered to the original temperature in the solid-phase and liquid-phase temperature region while performing a discharge of a perfectly molten material by the injection thereof and a supply of a molding material. After the inside of the heating holding cylinder is replaced with the supplied molding material, molding of the material is started. According to the invention, problems of remaining materials at the end of an operation in case where using a low melting point metal alloy, which exhibits thixotropy properties in a solid-phase and a liquid-phase coexisting temperature region, as a molding material, the material is melted to a semisolid material to be injection-molded, and at a temporary suspension of the molding therein, are solved by discharging the material in a perfectly molten material state.
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