随着科学技术的发展,各类新式造型方法不断涌现。尽管具体结构各不相同,却万变不离其宗,提高砂型紧实度及其分布的均匀性是提高铸件质量的关键,也是各类造型方法的首要任务。气动微震压实法取得了比较满意的紧砂效果,但其噪声的危害令人厌恶。因此,寻找紧砂效果好,而又没有噪音的造型方法已成为当务之急。差动压实造型法利用压实法无噪声 With the development of science and technology, all kinds of new modeling methods are emerging. Although the specific structure of different, but changing its course, to improve sand compactness and uniformity of distribution is the key to improving the quality of castings, but also the most important task of all kinds of modeling methods. Pneumatic microseismic compaction achieved relatively satisfactory sand effect, but the harm of noise is disgusting. Therefore, to find a tight sand effect, but no noise modeling method has become a top priority. Differential compaction modeling method using the noise-free compaction method