前言负压造型(简称V法)是七十年代出现的一种崭新的造型工艺,由于它有许多独特的优点,在世界各地的铸造行业中越来越广泛地采用,并被认为是八十年代最有发展前途的造型法。采用负压造型首先应具备一套合理的真空系统,以满足生产的需要。如真空泵的抽气量和砂箱大小、砂箱个数的匹配,合理设计真空罐的容积等。真空泵、真空罐过大,就会造成 Introduction The negative pressure modeling (V method) is a brand new molding process that emerged in the seventies. Due to its unique advantages, it has been adopted more and more widely in the foundry industry around the world and is considered to be the eighties The most promising modeling method. The use of negative pressure modeling should first have a reasonable vacuum system to meet production needs. Such as vacuum pump suction volume and the size of the sandbox, the number of sandbox match, the rational design of the volume of the vacuum tank. Vacuum pump, vacuum tank is too large, it will result