Die casting and moulding machine

Claim 1

IN A DIECASTING MACHINE INCLUDING FIRST AND SECOND DIE PARTS DEFINING A DIE CAVITY THEREBETWEEN, SAID FIRST DIE PART MOVABLE RELATIVE TO SAID SECOND DIE PART, MEANS DEFINING GATE AND RUNNER PASSAGES EXTENDING OUTWARDLY FROM SAID CAVITY TO A CHARGING CHAMBER, SAID CHAMBER ADAPTED FOR RECEIVING A SUPPLY OF MOLTEN METAL FROM A RECEPTACLE FOR DELIVERY TO SAID DIE CAVITY, IN COMBINATION THEREWITH, A VACUUM CONDUIT SELECTIVELY CONNECTABLE WITH SAID DIE CAVITY, A VACUUM CONTROL VALVE MEANS OPERABLY MOVABLE BETWEEN OPEN AND CLOSED POSITIONS AND CARRIED BY SAID FIRST DIE PART, SAID VALVE MEANS INCLUDING A SUBSTANTIALLY HOLLOW BODY PORTION CONNECTED TO SAID CONDUIT, ACTUATOR MEANS OPERATIVE TO MOVE SAID VACUUM CONTROL VALVE RELATIVE TO SAID FIRST DIE PART INTO SAID OPEN POSITION AND TO PROTRUDE A PORTION OF SAID VALVE BODY OUTWARDLY OF SAID FIRST DIE PART TOWARD SAID SECOND DIE PART, A BUSHING INSERT IN SAID SECOND DIE PART FORMING A CONTINUATION OF SAID CHARGING CHAMBER, SAID BUSHING INSERT CO-ACTING WITH SAID PROTRUDING VALVE PORTION TO DEFINE BETWEEN THEM A RESTRICTED CONTROL ORIFICE BETWEEN THE DIE CAVITY AND THE CHARGING CHAMBER OPERATIVE TO MODIFY THE EFFECT OF VACUUM IN THE CHARGING CHAMBER.