By Jonathan Gordon and Lee


Mazak, an alloy of Zinc and aluminium, is first melted in a crucible furnace.
 Molten metal is then poured by ladle in to an open steel mould where it is allowed to cool and solidify.

Gravity die casting process
 The mould is then turned upside down and tapped with a hammer to release the finished casting.
 Gravity die casting requires minimal finishing and waste as minimal because excess metal can be melted down and used again.

Things that you may recognise
 Things that are made from gravity die casting are:
 Toaster -
 Lawnmowers -
 Car wheel rims -

Identifying the process
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
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When something has been created by gravity pressure die casting there would be:
Section hair lines ejector pin marks sprue and runner marks

Materials
 The materials used in gravity die casting is a mixture of Zinc and aluminium.
 Zinc -
 Aluminium -

 Forcing metal under high pressure to form a mould.
 These moulds are called dies and are made from steel.
 This produces non-ferrous metals.

 Metals that are commonly used are also:
Aluminium -
Zinc -

What is made from the process
 In this process you can make:
 Golf club heads -
 Car engine blocks -
 Radiators -


High pressure die casting process
First the mould is sprayed with lubricant and closed.

Molten metal is then injected into the mould under high pressure.

High pressure die casting process
 Once the cavity is filled, the pressure is kept at a steady level until the casting has become solid.
 Finally, the die is opened and the casting is injected.

Identifying the process




When something has been created dy high pressure die casting there would also be:
Section hair lines ejector pin marks sprue and runner marks