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Slide 27 of 69
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Gravity and pressure die casting is also known as permanent mould die casting. In gravity die casting the dies are usually cast iron , the molten metal is poured into these moulds by gravity. The rapid rate of cooling given by chill gives good properties. It is used for the manufacture of plumbing fittings and taps. The dies for pressure die casting are made from machined tool steel and the metal is injected into mould under high pressure, the process gives good properties with a level of details and is ideal for long runs.