Method and apparatus for die casting of parts
AssigneeInterplex NAS, Inc.
InventorsGoonhee Lee, Bonggee Lee
Life of this patent
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Abstract
A cold-chamber die-casting apparatus and method for making a die-cast part with an open space within the geometry of the part. The apparatus includes an injection shaft which receives molten material for casting the part. The molten material is pushed with a plunger through a gate and into a tool cavity corresponding to the part. The gate is disposed at an end of the injection shaft and adjacent the tool cavity at a position that corresponds to the open space of the part and is inside the geometry of the part.
Claims16
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.
A method of casting a part having an open space within the geometry of the part, the method comprising:
- forming a tool cavity corresponding to the part by interfacing a first mold half and a second mold half;
- providing 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;
- positioning a gate opening, having a passage, at a distal end of the runner, inside the geometry of the part and in the open space of the part;
- introducing molten material into the injection shaft;
- and
- pushing the molten material from the injection shaft through the gate opening and into the tool cavity to produce a die-cast part using a plunger.
Dependencies are inferred from the claim text.