Aluminum alloy gravity casting is widely used in the field of pneumatic tool manufacturing. The housing of a pneumatic tool usually needs to have a certain degree of strength while being lightweight to ensure operator comfort and portability. Aluminum alloy gravity casting enables complex shell structures and provides appropriate strength and lightweight design. For equipment such as air compressors and pneumatic tools, the design of air intake system components is critical to performance. Gravity casting of aluminum alloys can produce air intake system components with superior airflow characteristics.