Casting shrinkage refers to the reduction in size of a metal casting due to the contraction of the metal as it cools and solidifies. The shrinkage rate is a percentage that represents how much the metal will shrink relative to its original size. This is an important consideration in the design of molds for casting processes to ensure that the final product meets the desired dimensions.
The formula to calculate the final size of a casting after shrinkage is:
\[ \text{FS} = \text{OS} - (\text{OS} \times \frac{\text{SR}}{100}) \]
Where:
Let's assume the following values:
Using the formula:
\[ \text{FS} = 10 - (10 \times \frac{5}{100}) = 10 - 0.5 = 9.5 \text{ inches} \]
The final size of the casting is 9.5 inches.