Die casting machine and casting method by thereof machine

A die casting machine including a pair of supports that are disposed in the opposite direction on a machine body, a guide rod that connects the supports to guide a movable support plate, and the movable support plate movably fixed to the guide rod, wherein the plate is moved along the guide rod by means of a piston rod of a first cylinder fixed to one of the supports, a movable mold and a mold fixing plate for fastening the movable mold are disposed on one side of the movable support plate, a second cylinder is fixed on the other side of the movable support plate, a tablet having an ejector pin for pushing a shaped product from the movable mold fixed thereto is integrally fixed to a piston rod of the second cylinder, a molten metal injection pipe and a mold fixing plate are fixed on one side of the other one of the supports, a fixed mold having a molten metal guide hole formed therein is fixed to the mold fixing plate, a support rod is fixed on the other side of the other one of the supports, an additional support plate is disposed at the end of the support rod, a third cylinder is fixed to the support plate, whereby a plunger of the third cylinder pushes the molten metal into the molten metal injection pipe and the metal is cast within the casting space formed by the fixed mold and the movable mold according to the shape of the casting space, the die casting machine comprising:

• a vacuum tank in which a vacuum apparatus is connected to a vacuum pump;
• a material injection pipe for injecting a material into the vacuum tank;
• two or more valves disposed in the material injection pipe for precluding air from introducing into the vacuum tank while the material is injected;
• a fourth cylinder that makes a plunger follow it, for supplying the material into the vacuum tank via the material injection pipe;
• a melted liquid crucible disposed within the vacuum tank for melting the material;
• a rack and a pinion for making the melted liquid crucible inclined in order to supply a melting metal that is melted within the melted liquid crucible toward the molten metal injection pipe by rotating the melted liquid crucible;
• a molten metal outflow hole formed at the bottom of the vacuum tank for introducing the molten metal discharged from the melted liquid crucible into the molten metal injection pipe;
• and
• a first plate valve disposed at a lower side of the vacuum tank for opening and shutting the molten metal outflow hole,
• wherein a plughole through which the plunger for pushing the material is formed in a second plate valve within one of the two or more valves that are fixed to the material injection pipe.