1. Presented by Karthick.C
METAL CASTING
Presented by
Karthick.C

2. CASTING
Casting is a manufacturing process in which the liquid molten material is poured into a mould.
Where mould is a hollow cavity of having required shape and dimension to hold the molten metal to produce a sound component to meet the required service conditions.

3. IMPORTANCE OF CASTING
Simple method to produce large and very complex parts
Low cost method
New models or prototypes can be produced
It offers complete range of mechanical properties

4. STAGES IN CASTING Pattern making Mould and core making
Melting and casting
Fettling
Testing and inspection

5. MOULDING SAND
The principal ingredients of moulding sand are silica sand grains, clay and moisture.
Refractoriness
Chemical resistivity
Permeability
flowability

6. TYPES OF MOULDING SAND Green sand mould Dry sand mould
Loam sand moulding
Oil sand moulding
Facing sand
Parting sand

7. TESTING OF MOULDING SAND
Grain size
Clay content test
Moisture content test
Permeability test
Shatter test

8. MELTING FURNACES Cupola furnace Crucible furnace Open hearth furnace
Blast furnace

9. TYPES OF CASTING PROCESS
Shell mould casting
Investment casting
Ceramic mould casting
Pressure die casting
Centrifugal casting
Continuous casting
Stir casting

10. SHELL MOULD CASTING

11. CERAMIC MOULD CASTING

12. PRESSURE DIE CASTING

13. CENTRIFUGAL CASTING

14. CONTINOUS CASTING

15. STIR CASTING

16. DEFECTS IN CASTING

17. Shrinkage
Scab
Swell
Cracks
mismatch

19. THANK YOU