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Die casting is a forming process for the mass production of, parts made from aluminum, magnesium, and their alloys. The casting process takes place in die casting machines which are divided in hot chamber and cold chamber die casting machines. The main difference is that in hot chamber casting machines the container with the molten metal is located inside the machine, while in the other case the container is placed outside the machine. In both types of machines, the molten metal is pressed from a casting chamber through one or more casting channels into the cavity of a permanent steel mold where it takes the shape which is determined by the die and solidifies. These die casting molds consist of two halves in order that the cast part can be removed from the mold. The feed side mold half is mounted on a fixed plate on the rigid side of the die casting machine, while the ejector side mold half is mounted on a movable plate placed on the other side. Before closing, the halves are sprayed with a release agent so that later the cast part can be easily released from the mold and the plates do not overheat. Depending on the size of cast parts, up to 300 casting cycles per hour can be carried out.
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