1. The document investigates factors that affect blow holes in the die casting process of aluminum alloy R14 for automotive compressor parts. 2. An experiment was conducted using Box-Behnken design to study the relationship between casting parameters (pressure, injection speeds, starting position, vacuum pressure) and blow holes. 3. The results found that all parameters significantly affected blow holes, with interactions between casting pressure and injection speed, casting pressure and vacuum pressure, injection speed and starting position, and starting position and injection speed also having effects. The optimum conditions to minimize blow holes were determined.