The Die Channels In Tooling Used For Aluminum Die Casting. In die casting, the flow of molten metal into the cavity requires several types of channels which are integrated into each die. Such cavities differ slightly for a hot chamber device and a metallic cold chamber machine. In hot chamber based machinery, the molten metal will be entering through the die through a piece of device called a sprue bushing and will then flow through the sprue spreader, which is found in the ejector die. The sprue bushing is heavily attached to the cover die. Sprue refers to the primary channel in which the molten metal will be entering the die cast tool.

In cold chamber type machinery, the molten metal will enter through the injection sleeve and after entering the area, the molten metal will flow through a series of runners. Then, the molten metal will then proceed through the gates of the parted cavities, similar to the process found in the hot chamber machine. The cavities have an extra special space called the overflow wells which provides additional source for molten metal during the solidification process. When the casting starts to cool off, the molten aluminum metal will then shrink and additional metals are required.

Lastly, the small channels which are included will act as the venting holes so that air will be able to escape the die cavity. These added channels will also allow water or oil to flow through the die in order to reduce the heat. That is why such channels are also referred to as the cooling channels.

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