Die Casting Tools: Cold Chamber Machine. Among the best advances in the die casting tooling category, there is always the creation of the machines to handle most of the work. As such, there are two kinds of machines that can create die casts on a mass production level. These are the hot chamber machine and the cold chamber machine. The hot chamber machines, as the name implies, utilizes heat from the very beginning of its process to the very end. The molten material is introduced to the dies via a heated cylinder. Even when the pieces are automatically ejected out of the die casting tooling molds, the operation relies heavily on the metal vats remaining at a continuous melting point level.
On the other hand, the cold chamber machine, despite its name, also uses molten material for its production. The difference lies in the fact that the molten material for this kind of machine is first relegated to an unheated cylinder or chamber – hence, the term cold chamber. The molten material is sealed within this chamber before injected into the waiting dies using highly pressured force.
Another major difference of the cold chamber machine versus the hot chamber one is the materials being used. Only molten materials that have relatively higher melting point are subjected to cold chamber processing. Aluminum is the most commonly used metal in cold chamber machines because it has a high melting point. Alloys that are mostly aluminum based also have higher melting point than most alloys and is therefore more suited for cold chamber production.
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