die casting power point
DESCRIPTION
castingTRANSCRIPT
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Die Casting By Jonathan Gordon and Lee
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Gravity Die Casting
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Gravity die casting process 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.
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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.
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Things that you may recognise Things that are made from gravity die casting are:Toaster -
Lawnmowers -
Car wheel rims -
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Identifying the process When something has been created by gravity pressure die casting there would be:Section hair lines ejector pin markssprue and runner marks
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Materials The materials used in gravity die casting is a mixture of Zinc and aluminium.
Zinc -
Aluminium -
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High pressure die casting
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High Pressure Die Casting Forcing metal under high pressure to form a mould.
These moulds are called dies and are made from steel.
This produces non-ferrous metals.
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Materials usedMetals that are commonly used are also: Aluminium -
Zinc -
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What is made from the process In this process you can make:
Golf club heads -
Car engine blocks -
Radiators -
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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.
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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.
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Identifying the process When something has been created dy high pressure die casting there would also be:Section hair lines ejector pin markssprue and runner marks