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A die for die-casting a V-block for an internal combustion engine may be operated by a wide range of die-casting machines, including those with inadequate capacity to operate the normally heavy dies for large cast parts. Such a die includes, in addition to a stationary die element for the stationary

A die for die-casting a V-block for an internal combustion engine may be operated by a wide range of die-casting machines, including those with inadequate capacity to operate the normally heavy dies for large cast parts. Such a die includes, in addition to a stationary die element for the stationary platen of a die-casting machine, only a single movable die element carried by the tie bars and slides of a die-casting machine and carrying the cylinder-forming die core pieces, means for locking the die core pieces in their extended cylinder-forming positions, and the plurality of cavity-forming slides.

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1. A die for forming a die cavity for casting a V-block for an internal combustion engine, comprisinga stationary die element including a cavity-forming surface for mounting on the stationary platen of a die-casting machine;a movable die element for mounting on the movable platen of a die-casting ma

1. A die for forming a die cavity for casting a V-block for an internal combustion engine, comprisinga stationary die element including a cavity-forming surface for mounting on the stationary platen of a die-casting machine;a movable die element for mounting on the movable platen of a die-casting machine for movement into cavity-forming engagement with said stationary die element, said movable die element including a cavity-forming surface portion, and carrying a plurality of slides including cavity-forming surfaces for movement transversely with respect to the movement of the movable platen and a pair of die core pieces reciprocatable in said movable die element at acute angles between extended positions in the die cavity and retracted positions substantially within said movable die element,said movable die element further carrying a die core locking member having forward die core engaging portions, said die core locking member being reciprocatable between a forward position, where said forward die core engaging portions engage rear portions of the die core pieces in their extended positions, and a rearward position out of contact with the die core pieces, and at least one sliding lock, carried by the movable die element for movement transversely of the movement of the die core locking member between an inward position between the die core locking member and an internal surface of the movable die element, thereby locking the die core pieces in their extended positions, and an outward position free of engagement with the die core locking member. 2. A die for casting a V-block for an internal combustion engine in a die-casting machine having a stationary platen and a movable platen, comprisinga stationary die element for mounting on the stationary platen of the die casting machine, anda movable die element for mounting on the movable platen of the die-casting machine, said movable die element carrying a plurality of transversely movable, cavity-forming slides and at least a pair of cylinder-forming die core pieces for reciprocation at an acute angle with respect to the movement of the movable platen between extended positions within the die cavity and retracted positions within the movable die element, and die core locking means movably carried within the movable die element to a die core piece locking position. 3. A die for casting a V-block for an internal combustion engine in a die-casting machine having a stationary platen and a movable platen, comprisinga stationary die element for mounting on the stationary platen of the die casting machine, anda movable die element for mounting on the movable platen of the die-casting machine, said movable die element carrying a plurality of transversely movable, cavity-forming slides and at least a pair of cylinder-forming die core pieces for reciprocation at an acute angle with respect to the movement of the movable platen between extended positions within the die cavity and retracted positions within the movable die element, and die core locking means movably carried within the movable die element to a die core piece locking position,wherein the die core locking means comprises a die core locking member reciprocatably carried within the movable die element along the axis of movement of the movable platen and operable in its forwardmost position to engage rear portions of the die core pieces and lock the die core pieces in their extended positions. 4. The die of claim 3, wherein the die core locking member is carried by the movable die element for reciprocatable movement within a cavity formed by the movable die element, said cavity having an open front portion into which the rear portions of the die core elements move in their extended positions, and including a rear surface. 5. The die of claim 4, wherein the cavity formed by the movable die element further contains a pair of lock elements reciprocatably carried for movement transverse to the movement of the die core locking member between inward positions between the die core locking member and the cavity rear surface, thereby preventing movement of the die core pieces within the die cavity, and outward positions permitting the die core locking element to disengage from the die core pieces and retraction of the die core pieces. 6. A die-casting assembly for casting a V-block for an internal combustion engine with a die-casting machine having a movable platen and a stationary platen, comprisinga stationary die element mounted on the stationary platen of a die casting machine,a movable die element mounted on the movable platen of the die casting machine, said movable die element carrying a pair of cylinder-forming die core pieces for movement at acute angles with respect to the movement of the movable platen between extended positions for formation of the cylinder-forming portions of a V-block- forming die cavity and retracted positions removed from the die cavity, and independently operable die core locking means engageable with the die core pieces within the movable die, and further carrying a plurality of cavity-forming slides,said stationary die element, movable die element and plurality of slides and pair of die core pieces forming a die cavity for casting a V-block for an internal combustion engine when the die is closed. 7. The die-casting assembly of claim 6, wherein the die core locking means comprises a die core locking member reciprocatably carried within the movable die element along the axis of movement of the movable platen and operable in its forwardmost position to engage rear portions of the die core pieces and lock the die core pieces in their extended positions. 8. The die-casting assembly of claim 7, wherein the die core locking member is carried by the movable die element for reciprocatable movement within a cavity formed by the movable die element, said cavity having an open front portion into which the rear portions of the die core elements move in their extended positions, and including a rear surface. 9. The die-casting assembly of claim 8, wherein the cavity formed by the movable die element further contains at least one lock element reciprocatably carried for movement transverse to the movement of the die core locking member between a first position between the die core locking member and the cavity rear surface thereby preventing movement of the die core pieces within the die cavity and a second position permitting the die core locking element to disengage from the die core pieces and retraction of the die core pieces. 10. The die-casting assembly of claim 7, wherein the movable platen carries at least one actuator, and the independently operable die core locking means includes a connection rod extending through the movable die element and movable platen and connected with the at least one actuator for reciprocation by the actuator within the movable die element. 11. The die-casting assembly of claim 10, wherein the at least one actuator comprises two hydraulic cylinders connected at their one ends to the movable platen and at their other ends to a bar that drives a pair of connecting rods extending through the movable platen and movable die element for engagement with the die core locking member. 12. The die-casting assembly of claim 7, wherein at least one actuator for the die core locking member is carried by the die-casting machine and is connected with a connection rod engaged with the die core locking member. 13. The die casting assembly of claim 6 wherein the independently operable die core locking means is connected with at least one actuator carried by the die casting machines. 14. The die casting machine of claim 13 wherein the at least one actuator is carried by the movable platen of the die casting machine. 15. The die casting machine of claim 14 wherein the at least one actuator is carried at the back of the movable platen and is connected with the independently operable die core locking means by at least one conne ction rod passing through an opening in the movable platen. 16. The die casting machine of claim 13 wherein the independently operable die core locking means is independently driven form a first position engaging the die core pieces to a second position disengaged from the die core pieces by an actuator carried on the back of the movable platen of the die casting machine.