Casting metals has certainly evolved from its earliest metallurgy practices. Formerly, the creation of alloy pieces from molten materials (like tin, steel, brass, silver and gold) was performed by hand. These days, thanks to advancements in technology, and a formal introduction of the die casting process by Elisha Root in 1830, pieces made from these practices can be made more economical, faster, safer, and yes, on a larger scale. The one difference is that precious metals like brass, silver and gold can hardly be used now in mass production, although die casting for jewelries is still practiced, albeit not prevalent.
Among the most prominent of all advancements in the die casting tools category are the actual machines used for mass productions. These machines are the cold chamber machines and the hot chamber machines.
The type of machines being used in die casting usually depends on the actual alloys of metals that are to be used during production. Because these machines are rather expensive and bulky at best, (and so are the raw materials needed to do the work) there are more companies now who either use cold machines exclusively or hot machines exclusively.
Cold chamber machines are suited for alloys that have a higher melting point. This would include aluminum and other alloys that may have higher aluminum content. On the other hand, alloys or pure metals that have low melting points can be processed in hot chamber machines. Such metals include: copper, lead, magnesium or zinc alloys. Alloys that have higher concentrations of these aforementioned metals usually have lower melting points, regardless of the other metals introduced in the mix, and are therefore more suited for the hot chamber machines.
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