The true pioneers of Industrial Development and the improving standard of living are the foundries – Metal, Iron or Ductile Iron Foundries across the nation. But do we really understand the actual functioning of the same?
Let us debunk this alien concept by understanding the basics of metal castings and different moulds used.
The process where the molten metal is poured into the mould containing a hollow cavity to get any geometrical shape one wants is casting. This process can be further can be divided into two types – Expendable or Semi-permanent Mould and Permanent Mould. Let us find out what are their functions:
Permanent moulds are made of metal with a high melting point over the metal that needs to be cast. The main purpose of using these permanent cores is because they are simple to use and can be reused. Such moulds are generally used for both low-temperature alloys and iron. The castings from this method have thin walls as they are produced with “close tolerance”. Castings made this way are fine-grained and dense with a smoother surface finish. A few common types of permanent castings are:
- Low-pressure Casting
- Gravity Casting
- Die Casting
Semi-permanent moulds are the ones where the cores are expendable and can result in more complex shapes. Usually, sand, plaster and ceramic is used as the core as it allows the possibility of being taken out or broken down to get the casting out. Such moulds are generally bound with a bonding agent that improves its properties and creates complex, intricate castings. A few of the examples are:
- Sand Casting
- Plaster Moulding
- Shell Moulding
- Ceramic Moulding
- Investment Casting
Among the foundries in Kolkata famous as industrial casting manufacturers, Govind Steel is one of them. Govind Steel is one of the largest and leading foundries for Grey Iron Castings and Ductile Iron Castings in India. To know more about the same, kindly visit – www.govindsteel.com