Comparison Between Green Sand Moulds And Dry Sand Moulds
Sand moulded casting is characterized by the use of sand as a moulding material. Sand moulded casting is the simplest and most versatile casting method used to make castings. Sand is the most popular molding material due to its heat receptivity, permeability and low cost. Over 60% of metal casting is done by using sand moulds. Sand moulds are broadly classified into two Green sand moulds and Dry sand moulds.
Here is the difference between Green sand moulds and Dry sand moulds
|
Green sand moulds |
Dry sand moulds |
|
It is called
“green” in the sense that
it is wet |
It is not wet. It
does not require moisture to develop the strength. Special drying equipment
is needed fot drying. |
|
Since it is not
strong, the green sand mould cannot be used for complex casting shapes. |
Dry sand
mouldings are stronger when compared to wet sand mould. |
|
The moisture
present in moulding cause defect in certain metal casting. |
Reduce the defects
caused by moisture. |
|
Green sand mould may
get damaged during handling. Also, it cannot store for a long period of time. |
Compared to green
sand mould, dry sand mould wouldn’t get damaged easily. |
|
Low dimensional
accuracy and surface finish are not up to the mark. |
Better surface
finish. |
|
It is less
time-consuming |
More time
consuming |
|
Less permeability |
More permeable
than green sand moulding. |
|
They are used for
making grills, weights, moulding boxes etc. |
Used for making
parts like larger rolls, gear housing etc. |