Can gravity die casting be performed on the same facility as of HPDC? If so, how is that possible? Thank you.
They could be in the same facility, but definitely not on the same machinery. Gravity die casting is produced by pouring molten metal into permanent cast-iron molds, and HPDC is injecting molten metal under high pressure into a steel die.
The process of HPDC and Permanent mold gravity casting is different in a sense that rather than high pressure, gravity is used to fill the mold with the liquid alloy, this alloy must be non ferrous. Typically Al, Zn and Cu based alloys. Gravity die casting gives good accuracy, the surface is smoother compared to sand casting, material properties are better than sand casting and the product quality is more or less the same for all produced products with the same mold, unlike sand casting where the product quality can differ because of use of new molds. Gravity die castings cannot be done using the same equipment as the high pressure die casting. HPDC uses pressure to inject the molten alloy and therefore usually the inlet is from bottom. But for gravity die casting the molten alloy is poured on from the top and vertically flows down.
