Abstract: A casting device includes: dies formed with a cavity including an opening at a lower portion; a pressurizing chamber disposed below the dies and containing molten metal and further formed with a sealed space above the molten metal; a cylindrically-shaped stalk having an upper end opening communicating with the opening of the cavity and a lower end opening immersed into the molten metal contained inside the pressurizing chamber; a pressurizing means configured to supply a gas to the sealed space of the pressurizing chamber to pressurize the inside of the pressurizing chamber; a depressurizing means configured to discharge a gas from the cavity to depressurize the inside of the cavity; and a control device.

Abstract: A gas venting arrangement incorporated into a mold for use in a die casting or injection mold machine, having a passage for venting gases including by-pass passages and a valve chamber consisting of a forward portion formed in the mold where the valve is slidably received and a rear portion formed by a member separate from the mold. The valve and the passage are designed so that the valve is forced to move from an opened position to a closed position to shut the passage upon axial impingement of a melt from a cavity of the mold. The arrangement has a first system for biasing the valve into the opened position, a second system for biasing the valve into the opened position upon the melt impingement, and a system for releasing the valve from the second biasing means to return from the opened position to the closed position.