CYLINDER HEAD CASTING APPARATUS AND METHODS

摘要

A casting apparatus for forming a cylinder head. The apparatus is configured to inhibit gate stick by promoting top-down directional solidification of molten metal in the mold cavity by any one or more of specific placement of gate pins in relation to apertures used to deliver molten metal to the mold cavity, circulating a cooling medium through the gate pins in a parallel fashion, configuring the gates so that a volume on the lower side of the gate is larger than a volume on the upper side of the gate, and insulating the inside surfaces of feeder lids and feeder bowls.

主权项

1. A method of casting a cylinder head by directionally solidifying molten metal in a mold, the method comprising:
providing the mold, the mold defining a mold cavity and comprising an aperture through which molten metal is delivered to the mold cavity, providing a gate pin insertable into the mold cavity, the gate pin defining an interior cooling passage for circulating a cooling medium therein, positioning the gate pin in the mold cavity such that a distance between the interior cooling passage of the gate pin and the aperture is less than a width of the aperture, transporting molten metal through the aperture and to the mold cavity; and directionally solidifying the molten metal in the mold cavity from a top of the mold to a bottom of the mold by circulating the cooling medium through the interior cooling passage of the gate pin to thereby form the cylinder head.