Hot/Cold Chamber Casting

Hot and Cold Chamber Die Casting has driven efficiencies demanded by industry over the last 20 years. As a result companies have taken advantage of this process to reduce cost and increase volume through improved production and manufacturing techniques.

For example, components in the automotive industry were traditionally pressed or machined out of steel. K-frames A, B and C-pillars are several such components.  With the old way of making them, they were pressed out of metal and then fabricated by hand or by robot and were traditionally heavy by nature.  The net effect is a heavy car with poor fuel economy and high manufacturer input costs.

Die casting has been providing advantages for some time to a wide range of industries. For the automotive manufacturers, they design die cast components with complex shapes to reduce the number of components needed in an assembly, reducing vehicle weight and deliver way lower input cost.

These benefits for all companies have been gained through using many different methods of die casting.  The two (2) processes Diecast Australia has been using to deliver results to a wide variety of industries are;

  • Hot Chamber Die Casting
  • Cold Chamber Die Casting


Both processes use dies to mould the components, however there is a significant difference and that lies in the way the shot is delivered to the chamber.

In Hot Chamber Die Casting, the cylinder chamber and the injection mechanism is totally immersed in the molten bath.

Inversely, in the Cold Chamber Die Casting process, the injection mechanism is fed by hand or an automated ladle. The Hot Chamber Die Casting method is much preferred because of the lower melting point of the parent material, for example zinc. In the case of Cold Chamber Die Casting, aluminium is used and because of the higher melting point, greater distortion and massive reduction in life cycles would occur if the injection mechanism and cylinder chamber were immersed.


Diecast Australia specialises in both of these methods and dependent on the specification and required material either process can be used to affect the desired results.

See our capability to learn about the range of machines we have.