Advantage：
1. Less blowhole inside the casting, which can be heat treated.
2. The mold has long life and low cost.
3. High elongation rate.
4. The process is relatively simple.
Disadvantage：
1. Slow filling and low production efficiency.
2. Relying on liquid self-weight molding, the product has low density and slightly weak strength.
3. The surface smoothness of the product is not high.
4. Not suitable for producing thin-walled parts.
Applicable：
Apply to products with large wall thickness, such as steering knuckles, control walls and other chassis safety parts.
