Die casting:

Hot chamber and Cold chamber die casting vary from each other in the following respects :

1. Melting unit is not an integral partition of the cold chamber die casting machine.

2. Molten metal is brought up and poured into the die casting machine along the help of ladles.

3. In case of cold chamber procedure high pressures tend to enhance the fluidity of molten metal possessing comparatively lower temperature and therefore castings manufactured are denser, accurate dimensionally and free from blowholes.

4. In case of cold chamber procedure die components experience less thermal stresses because of lower temperature of the molten metal. Although, dies are needed to be made stronger to bear high pressures.

5. Cold chamber procedure has a longer cycle time compared to hot chamber procedure.

6. In case of cold chamber procedure as metal is ladled from a furnace, it might lose superheat and can cause defects such like cold shuts.