What are the methods to control the shrinkage rate of precision casting?

The shrinkage rate of investment casting is controlled by the following methods:

1. Mold design: In mold design, the impact of casting shrinkage on product size must be taken into consideration, and each part of the mold should be designed reasonably to ensure the stability and accuracy of product size.

2. Casting process: Optimize the casting process, control the casting shrinkage and improve the stability and accuracy of product dimensions by adjusting factors such as casting temperature, casting speed, and the position of the casting in the mold.

3. Material selection: Choose suitable casting materials. Different materials have different shrinkage rates. Choosing materials with smaller shrinkage rates can reduce the degree of product dimensional changes.

4. Production process control: During the production process, the casting conditions must be kept stable to avoid the influence of external factors on the casting shrinkage, such as temperature, pressure, etc.

5. Measurement and correction: By measuring changes in product dimensions, the impact of casting shrinkage on product dimensions can be discovered and corrected in a timely manner to ensure the accuracy and stability of product dimensions.