铝合金铸件易产生疏松、缩孔缺陷，靠传统经验的方法设计浇注系统会导致较长的开发周期、较高的铸造成本。 为了获得高质量的合格铸件，并缩短研发周期，本文采用 ProCAST 软件对某铝合金壳体熔模铸造工艺设计进行了优化。 模拟结果显示原始组合方案下铸件 2 处位置会产生疏松缺陷，并通过试验验证试样件缺陷数量与位置与数值模拟结果相符，而优化后工艺方案所生产的试样件无缺陷产生，符合产品质量要求。

Aluminium alloy castings are prone to porosity and shrinkage defects. Designing a gating system based on traditional experience can lead to longer development cycles and higher casting costs. To obtain high-quality qualified castings and shorten the research and development cycle, ProCAST software was used to optimize the investment casting process design of an aluminium alloy shell. The simulation results show that porosity defects occur at two positions in the casting prepared by the initial combination plan. The number and location of the defects in casting are experimentally verified to be consistent with the numerical simulation results, while no defects are observed in casting after optimizing the process plan, meeting the product quality requirements.