Die Casting Principles

Die casting process is very different from sand casting as the mould used here is permanent. The mould is not expandable and need not to be broken after the cooling and solidification. Here the mould is called the die. 

Please Read : 

Comparison of different casting process 

A complete Guide to casting process 

Gravity die casting:

When the molten is metal is poured under a gravity head into the permanent mould it is called gravity die casting. It is also known as permanent mould casting. 

Gravity Die Casting properties:

(a)    It uses permanent mould and cavity. 

(b)   Accurately machined. 

(c)    Decent thermal conductivity 

Applications of gravity die casting 

These are used to make precision aluminum precision casting parts, machine parts, motor parts, heavy metal parts. 

Pressure die casting:

When molten metal is injected into the permanent metallic mould by the means of the external pressure it is known as die casting or pressure die casting. In this process the liquid metal is forced into the permanent die. 

Applications of pressure die casting  

Cast parts obtained from pressure die casting are used in automobiles , electrical equipment, motors, machine parts, telecommunication equipment, building materials, auto ancillary and many other sectors. Home appliances and children's toys also use pressure die cast parts . 

Please Read : 

Sand Casting Process 

Centrifugal Casting Process 

Casting Defects 

Types of Patterns used in casting