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对几种软隔膜覆盖砂型气流紧实进行了试验,结果说明以覆盖塑料薄膜的效果为好。但塑料薄膜覆盖对于模样顶面宽大,且深凹部的深凹比大的砂型的气流紧实的匀实性不利。
Several kinds of soft membrane covered sand compacting were tested, the results show that the effect of covering the plastic film is better. However, the plastic film coating is unfavorable to the fact that the shape of the top surface of the sample is large and the compactness of the air flow of the sand mold with a large depth-to-pocket ratio of the deep recess is large.