Foundry Technology: Metal Casting

• Metal Casting: An Ancient manufacturing process from 5000 BC; most common manufacturing process.

• Ancient Indians and Egyptians has developed the techniques of mining, refining foundry and metal working.

• Indus Valley Civilization – Meting of Bronze and Copper - casting of coins and idols (eg: Nataraja idols, dancing girl, jewellery, etc.)

• Word Foundry originated from Latin word- fundere (meaning: melting & pouring).

Classification of Casting processes

Conventional Moulding Processes:

• Green Sand moulding

• Dry Sand moulding

• Flask-less moulding

Chemical Sand Moulding Processes:

• Shell moulding

• Sodium Silicate Moulding

• No-Bake Moulding

Permanent Mould Processes:

• Gravity Die casting

• Pressure die Casting

Special Casting Processes:

• Investment casting

• Continuous casting

• Vacuum sealed moulding (1971)

• Squeeze casting

• Centrifugal casting (1809)

• Stir casting

Common Industrial Casting Processes