Patent ID: 7971628

Claim:
A cold-chamber die-casting apparatus for casting a part having an open space within the geometry of the part, the apparatus comprising: an injection shaft having an internal biscuit that is disposed at a distal end of the injection shaft, the internal biscuit fluidly coupled to a proximal end of a runner that delivers molten material from the injection shaft into a tool cavity via a gate opening at a distal end of the runner, the gate opening having a passage and positioned inside the geometry of the part and in the open space of the part, the injection shaft configured to receive a molten material; a first mold half and a second mold half that interface to form a tool cavity corresponding to the part, the distal end of the injection shaft, the internal biscuit, the runner, and the gate opening confined to the first mold half; and a plunger disposed within the injection shaft and configured to inject the molten material from the injection shaft into the tool cavity through the gate opening.