一、问题的提出气流冲击紧实所得砂型紧实度高,造型机结构简单,生产率高而且噪声相对地较低,是一项正在发展的造型方法。为了更好地了解和运用这种新的方法,需要对其工艺特性进行研究。特别需要对复杂的模样给气冲紧实过程的影响加以了解。只有掌握具有不同模样砂型气冲紧实所得砂 First, the issue put forward the impact of airflow compact sand obtained high degree of compaction, molding machine structure is simple, high productivity and relatively low noise, is a developing modeling method. In order to better understand and use this new method, its process characteristics need to be studied. In particular, it is necessary to understand the impact of complex patterns on the gas-tight process. Only grasp the sand with a different shape sand gas compaction