The Four Steps of the Die Casting Process
The die casting process is a hard task, though in the end, it can be very rewarding. Basically, it is the process of subjecting a molten metal to high pressure in order to create mold cavities. These mold cavities are eventually transformed into dies. Die casting can only be done with metals, the most popular kinds being tin, lead, magnesium, copper, zinc, aluminium, and their alloys. Non-ferrous metals are the recommended kinds for die casting. As a whole, die casting is usually done when small or medium-sized metal parts are needed, and require good detail, dimensional consistency and a very fine surface quality. In the metalworking industry, the die casting process is immensely popular mainly because of its versatility.
One thing that die casting has to compete with, however, is the process of injection-molding plastic parts. People who would rather settle for cheaper things of lower quality are now turning to plastic instead of metal. However, when it comes to house parts and similar materials, die casting remains as the leading practice for small structures.
The die casting process can be summarized in four major steps. First of all, the mold needs to be sprayed with an amount of lubricant and then closed, for the lubricant will help control the die’s temperature, as well as assist in removing the casting. Then, the molten metal is put into the die under a very high pressure. The pressure must be maintained until the casting is solidified. After opening the die, the shot, using ejector pins, is removed, and then the scrap is separated from the castings.
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