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真空密封造型又称负压造型或简称V法造型,是七十年代发展起来的一种新的造型方法。自1971年日本发明这种造型方法以后,各国的铸造工作者都已开始试验和应用这种新的造型方法。我们从1974年试验研究真空密封造型法,浇注铸铁研磨盘、铝合金井字框等铸件,在1977年成功地浇注了钢琴弦排。本文介绍了真空密封造型的工艺特点及其在钢琴弦排上的应用。一、工艺特点及造型过程真空密封造型是利用型砂对型腔产生的负压,使铸型保持清晰的形状和具有一定的强度。其工艺特点是:在造型时使用不含任何粘结剂和水份的干砂,由
Vacuum seal, also known as negative pressure modeling or V-shaped modeling, is the seventies developed a new modeling method. Since 1971, Japan invented this modeling method, casting workers in various countries have begun to test and apply this new modeling method. We tested the vacuum seal molding method from 1974, casting cast iron grinding disc, aluminum alloy well box and other castings, in 1977 successfully cast piano strings. This paper introduces the process characteristics of vacuum sealing and its application in the piano chord row. First, the process characteristics and modeling process Vacuum sealing is the use of sand on the cavity of the negative pressure, so that the mold to maintain a clear shape and have a certain intensity. The process is characterized by: the use of modeling does not contain any binder and water dry sand, by