Unit die assembly

Claim 1

A UNIT DIE COMBINATION COMPRISING A BASE, A BOTTOM SPRUE BAR RIGIDLY MOUNTED ON SAID BASE, AN UPPER SPRUE BAR SLIDABLY MOUNTED WITH RESPECT TO SAID BOTTOM SPRUE BAR, A TOP PLATE ON SAID UPPER SPRUE BAR OVERLYING SAID BASE, SAID BASE AND TOP PLATE DEFINING AN OPENING THEREBETWEEN, A LIFTER PLATE, MEANS FOR MOUNTING SAID LIFTER PLATE ON SAID BASE FOR MOVEMENT IN DIRECTION PERPENDICULAR TO THE BASE AND TO THE TOP PLATE, SAID LIFTER PLATE HAVING A CENTRAL PORTION CARRYING SPRUE EJECTOR PINS, AN UPPER DIE CAVITY BLOCK MOUNTED ON THE LOWER SURFACE OF SAID TOP PLATE, AND A LOWER DIE CAVITY ASSEMBLY COMPRISING A LOWER DIE CAVITY BLOCK, A CORE PLATE AND AN EJECTOR PIN PLATE MOVABLE AS A SUB-ASSEMBLY INTO SAID OPENING BETWEEN SAID BASE AND SAID TOP PLATE, AND MEANS OPERABLE TO LOCK SAID CORE PLATE AND SAID EJECTOR PIN PLATE IN POSITION IN SPACED RELATION, SAID EJECTOR PIN PLATE BEING THUS ENGAGED WITH SAID LIFTER PLATE TO OPERATE SIMULTANEOUSLY THEREWITH, AND MEANS FOR ACCELERATING THE MOVEMENT OF AT LEAST ONE OF SAID EJECTOR PINS RELATIVE TO SAID LIFTER PLATE AFTER A PREDETERMINED MOVEMENT OF SAID LIFTER PLATE TO INCREASE THE LIFTING RATE OF SAID ONE EJECTOR PIN ABOVE THAT OF THE PLATE.