3. 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.
4. 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.
5. Things that you may recognise
Things that are made from gravity die
casting are:
Toaster -
Lawnmowers -
Car wheel rims -
6. Identifying the process
When something has been created by
gravity pressure die casting there would be:
Section hair lines
ejector pin marks
sprue and runner marks
7. Materials
The materials used in gravity die casting is a
mixture of Zinc and aluminium.
Zinc -
Aluminium -
9. 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.
10. Materials used
Metals that are commonly used are also:
Aluminium -
Zinc -
11. What is made from the process
In this process you can make:
Golf club heads -
Car engine blocks -
Radiators -
12. 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.
13. 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.
14. 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
