Patent ID: 6564854
Filing Date: 2003-05-20
Classification: B22D,Y10S

Abstract:
A method of manufacturing a molded part, comprising:cutting and granulating a plasticized solid magnesium alloy material into pellets; forming the pellets into a semi-solid state material, the semi-solid state material including a liquid phase and a solid-phase, the semi-solid state material having 50% or less of a solid phase rate and a particle size of the solid phase being set to be equal to or less than one fiftieth a thickness of the molded part by stirring the pellets by using a semi-solid injection molding machine having a cylinder, an injection nozzle of which the diameter is smaller than that of the cylinder, and a screw for stirring the pellets in the cylinder to be brought into the semi-solid state material; injecting the semi-solid state material into a mold; distributing the liquid phase in an outer layer of said molded part and distributing the solid phase and the liquid phase in an inner layer of said molded part, whereby a layer of said molded part has the outer layer being formed by the liquid phase and the inner layer being formed by the solid phase and the liquid phase; coagulating said injected semi-solid state material in the mold after said distributing; and removing the molded part from the mold, the molded part constituting a finished article.