Advantage：
1. Accurate control of filling speed and high casting density.
2. The high utilization rate of metals significantly reduce the material costs and processing time.
3. With low labor intensity and good conditions, simple equipment is easy to realize mechanization and automation.
4. Using bottom-injection filling can improve the qualification rate of castings.
Disadvantage：
1. The product is limited due to the small freedom of the gating scheme.
2. Long casting cycle and poor productivity, the high mold temperature slows down the solidification rate.
Applicable:
Products with medium wall thickness and high performance requirements, such as wheel floor safety parts.
