Apparatus and Method for Die-Casting Metal Objects in a Semisolid State

An apparatus for die-casting metal objects in a semisolid state, comprising a mold which comprises an upper an upper mold half which is adapted to be coupled to a lower mold half in order to define a mold cavity, an oven being arranged below said lower mold half and being provided with a supply duct for liquid metal which connects said oven to said mold cavity, said upper mold half being provided with a cavity within which a forging piston, which accommodates a flow control plunger inside it, is freely movable between the upper mold half and the lower mold half, a vacuum channel being provided circumferentially around a piece to be cast and being connected to said mold cavity by means of vent channels, said forging piston comprising a connecting channel for connection to a vacuum, in order to create the vacuum, the upper mold half comprising a connecting channel for connection to a vacuum pump, which connects said vacuum channel to the outside, comprising a solenoid valve for controlling the vacuum inside said channel and a solenoid valve for controlling the vacuum in the connecting channel for connection to the vacuum pump.