A process for moulding and forging objects in aluminium, aluminium alloys, light alloys, brass, bronze and the like comprises the steps of inserting in a mould cavity (70) liquid metal coming from a feed duct (10) until the total filling of the cavity (70); forming an accumulation cavity (71) of the mould cavity (70), and accumulating further liquid metal in the accumulation cavity (71), then closing the communication with the duct (10); compacting the material in the semi-solid state by compression of at least a portion of the surface of cavity (70); maintaining closure and pressure for a predetermined period of time; opening ' the moulds and removing the piece.
