Method and apparatus for injection molding metal material

An injection molding apparatus for a metal material in a liquid phase state, comprising:

• a unified injection apparatus comprising a single heating cylinder provided with a nozzle at a tip thereof and a supply port of a granular metal material at a rear portion thereof, a screw disposed inside said heating cylinder, said screw operative to rotate and move along an axial direction, and a front chamber inside said heating cylinder abutting said nozzle;
• a mold;
• a sprue bush disposed inside said mold;
• a clamping apparatus provided to clamp said mold in opposition to said injection apparatus at said tip;
• wherein said injection apparatus and clamping apparatus are placed on an apparatus platform in an inclined position at a same angle with said mold at a lower end, so that the metal material in a liquid phase state in said heating cylinder flows down into said front chamber of said heating cylinder due to self-weight,
• wherein said screw is operative to push the metal material in the liquid phase state from said front chamber into said nozzle during forward movement of said screw, the granular metal material becoming liquid during passage from a rear to a front of the screw;
• and
• wherein said nozzle and said sprue bush inside said mold are positioned on a same straight line, thereby maintaining contact of said nozzle without bending said nozzle.