Die casting-power-point

Die CastingDie Casting

By Jonathan Gordon By Jonathan Gordon and Leeand Lee

Gravity Die CastingGravity Die Casting

Gravity die casting Gravity die casting processprocess

Mazak, an alloy of Zinc and aluminium, is first Mazak, an alloy of Zinc and aluminium, is first melted in a crucible furnace.melted in a crucible furnace.

Molten metal is then poured by ladle in to an Molten metal is then poured by ladle in to an open steel mould where it is allowed to cool and open steel mould where it is allowed to cool and solidify.solidify.

Gravity die casting processGravity die casting process

The mould is then turned upside down and The mould is then turned upside down and tapped with a hammer to release the finished tapped with a hammer to release the finished casting.casting.

Gravity die casting requires minimal finishing Gravity die casting requires minimal finishing and waste as minimal because excess metal can and waste as minimal because excess metal can be melted down and used again.be melted down and used again.

Things that you may recogniseThings that you may recognise

Things that are made from gravity die Things that are made from gravity die casting are:casting are:

Toaster - Toaster -

Lawnmowers - Lawnmowers -

Car wheel rims - Car wheel rims -

Identifying the process Identifying the process

When something has been created by When something has been created by gravity pressure die casting there would gravity pressure die casting there would be:be:

Section hair lines Section hair lines ejector pin marksejector pin marks sprue and runner markssprue and runner marks

Materials Materials

The materials used in gravity die casting The materials used in gravity die casting is a mixture of Zinc and aluminium. is a mixture of Zinc and aluminium.

Zinc - Zinc -

Aluminium - Aluminium -

High pressure High pressure die castingdie casting

High Pressure Die CastingHigh Pressure Die Casting

Forcing metal under high pressure to Forcing metal under high pressure to form a mould.form a mould.

These moulds are called dies and are made These moulds are called dies and are made from steel. from steel.

This produces non-ferrous metals.This produces non-ferrous metals.

Materials usedMaterials used

Metals that are commonly used are also: Aluminium -

Zinc -

What is made from the processWhat is made from the process

In this process you can make:In this process you can make:

Golf club heads -Golf club heads -

Car engine blocks - Car engine blocks -

Radiators -Radiators -

High pressure die casting High pressure die casting processprocess

First the mould is sprayed with First the mould is sprayed with lubricant and closed. lubricant and closed.

Molten metal is then injected into Molten metal is then injected into the mould under high pressure. the mould under high pressure.

High pressure die casting High pressure die casting processprocess

Once the cavity is filled, the pressure is Once the cavity is filled, the pressure is kept at a steady level until the casting has kept at a steady level until the casting has become solid.become solid.

Finally, the die is opened and the casting Finally, the die is opened and the casting

is injected.is injected.

Identifying the processIdentifying the process

When something has been created dy When something has been created dy high pressure die casting there would high pressure die casting there would also be:also be:

Section hair lines Section hair lines ejector pin marksejector pin marks sprue and runner marks sprue and runner marks