The practical application of producing iron castings and steel castings using the vaccum-sealing moulding method(V-Process) were introduced.
介绍了利用真空V法工艺生产铸铁件、铸钢件的实际应用过程，总结了V法造型工艺的优缺点和操作技巧。
2
In order to save materials and promote the productivity, the cleavage spinning technology is adopted to the formation of V-type or multiple moulding sheave of auto engine.
为了节省材料和提高生产率，采用劈开式旋压工艺将拉深的毛坯旋压成汽车发动机用V型或多模式皮带轮。
3
Based on the formation mechanism of penetration, the reason causing penetration defects of V-process castings was analyzed with considering the features of vacuum moulding process.