Vacuum die casting method and vacuum die casting apparatus

A vacuum die casting apparatus for carrying out casting with a casting cavity evacuated, comprising:

• a closure member forming a vacuum chamber by movement of the closure member toward a plunger sleeve, the vacuum chamber surrounding a molten metal inlet of the plunger sleeve and an open end of the plunger sleeve located on an opposite side of the plunger sleeve from where a casting die is positioned;
• and
• a mechanism for evacuating the vacuum chamber and the cavity,
• wherein a molten metal is poured from the inlet, followed by forming the vacuum chamber, and the evacuation of the vacuum chamber and the cavity starts before starting an operation of a plunger tip,
• wherein the closure member has an open end through which the open end of the plunger sleeve is inserted and having a closed end provided with a hole into which a shaft of the plunger tip inserts, and
• wherein the shaft of the plunger tip is actuated by an actuator disposed outside of the vacuum chamber.