Short description of the Die Casting process

1. Die Casting Definition.
English Version.
Diecasting (Definition)
Diecasting is the mechanical process of casting in which the molten metal is pressed
into a metallic and permanent mold. The filling process is based on transforming the energy
of pressure acting on the fluid material into kinetic energy, that is to say, it consists in
introducing the molten material into the mold cavity with a high pressure and speed. The
action of the pressure helps the molten material to reach all sections of the mold (even in
thin sections) helping to obtain an accurate repeatability with accurate contours being one of
the main advantages of this process.
Once the material has been injected into the
mold cavity it starts cooling down yet exercising
pressure on it, which favors the subsequent
compaction. Therefore, this process favors the
production of parts with thin walls and complex
shapes with high quality surface and accuracy. The
casting is from the standpoint of technical and
economic a progress compared to other ways of
manufacturing processes (molding sand or shell),
allowing rapid fabrication sequence apart from a
relatively short path between the initial metal and
the finished part.
It is important to emphasize that this process is suitable for mass production because
it requires a heavy investment in matrices over other manufacturing processes. Therefore the
investment should pay off with the manufacture of more and more parts.
Typical die temperatures and life for various cast materials:
Zinc Aluminium Magnesium
Maximum die life [number of cycles] 1,000,000 100,000 100,000
Die temperature [C° (F°)] 218 (425) 288 (550) 260 (500)
Casting temperature [C° (F°)] 400 (760) 660 (1220) 760 (1400)
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