气冲紧实等高速冲击紧实造型方法的扩大应用引起一个问题。亦即,传统的型砂试样三锤紧实方法,已有60多年的历史,用这一方法所制得的砂样究竞在多大程度上能代表气冲紧实砂型的性质,本文对此进行了研究。试验中,用不同的方法制成Φ50×50mm的标准试样。 Gas tight and other high-speed impact compact modeling methods to expand the application of a problem. In other words, the conventional method for compaction of the sand sample has more than 60 years of history. The extent of the sand sample produced by this method can represent the nature of the compacted sand type. In this paper, Were studied. In the test, a standard sample of Φ 50 × 50 mm was made by different methods.