The problems causing by technology of traditional EDM existing inmoldprocess were analyzed. The advantage and limitation of HSM were introduced.
分析了传统电火花加工工艺在模具制造中存在的主要问题，介绍了高速铣削技术加工模具的优越性和局限性。
2
Casting is a manufacturing processin which molten metal is poured or injected and allowed to solidify in a suitably shaped mold cavity.
铸造是一种将熔化的金属倒入或注入合适的铸模腔并且在其中固化的制造工艺。
3
This article mainly aims at the internal mold used in the process of prefabricating box-girder and conducts researches on it's structural style, activity principle and so on.