1. By Jonathan Gordon and Lee
Die Casting
By Jonathan Gordon and Lee

2. Gravity Die Casting

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 -

8. High pressure die casting

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