APPARATUS AND METHOD FOR THE DIE CASTING IN THE SEMISOLID STATE OF OBJECTS MADE OF BRASS, BRONZE, ALLOYS OF ALUMINUM, MAGNESIUM AND LIGHT ALLOYS AND THE LIKE

摘要

An apparatus (1) for the die casting in the semisolid state of objects made of brass, bronze, alloys of aluminum, magnesium and light alloys and the like, comprising an upper die part (3) adapted to be mated with a lower die part (2), the mating between the upper die part (3) and the lower die part (2) forming a casting cavity (4), a furnace (7) being arranged below the lower die part (2) and being provided with a duct (9) for feeding liquid metal (8) which connects to the casting cavity (4), the upper die part (3) being provided with a cavity in which a forging piston (5) can move freely, the piston accommodating internally a flow control plunger (6), its particularity consisting in that it comprises, between the upper die part (3) and the lower die part (2), circumferentially around the part to be cast, a vacuum channel (10) connected to the casting cavity (4) by means of at least one venting channel (12).