Patent ID: 6953079

Claim:
A die casting machine, comprising: a fixed die having first and second recessed portions; a movable die having third and fourth recessed portions; a sleeve having a first split sleeve connected to the second recessed portion and a second split sleeve connected to the fourth recessed portion; a first movable ejecting pin having a first opening, a second opening, an end, a release agent feed path, and a lubricant feed path, the first opening formed at a portion adjacent to the end and connected to the release agent feed path, the second opening formed at a portion adjacent to the end and connected to the lubricant feed path; a first ejecting pin driver for moving the first ejecting pin; and a controller, (a) wherein, when the fixed die and the movable die are clamped together: (i) the first recessed portion and the third recessed portion define a cavity, (ii) the second recessed portion and the fourth recessed portion define a first path for guiding a molten metal into the cavity, (iii) the first and second split sleeves define a second path for introducing the molten metal to the cavity through the first path, (iv) the fourth recessed portion defines a hole though which the first ejecting pin is configured to pass; (v) the first opening of the first ejecting pin is directed toward the cavity while the second opening of the first ejecting pin is directed towards the second path; and (b) wherein, when the fixed die and the movable die are clamped together, the controller: (i) drives the first ejecting pin driver to move the end of the first ejecting pin into the first path, (ii) feeds a powder release agent to the release agent feed path, injects the powder release agent through the first opening into the cavity to deposit the powder release agent on the inner surface of the cavity, (iii) feeds a powder lubricant to the lubricant feed path, injects the powder lubricant through the second opening into the second path to coat the inner circumference of the second path of the sleeve, (iv) drives the first ejecting pin driver to move a face of the end of the first ejecting pin into alignment with the inner wall of the first path to form a molten metal guide path, and (v) after completing a casting, drives the first ejecting pin driver to push the first ejecting pin into the casting to separate the movable die from the casting.