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通过DN200水幕阀芯的形状、结构、精密铸造工艺分析,合理设计了DN200水幕阀芯蜡模,方案:模具采用三开模,通过一个锥形定位环作为定位连接的纽带精确定位。蜡模制造时,根据射蜡机的最大射蜡量,手工制作相当数量的不规则形状硬蜡团,添加到模具的型腔中再合模射蜡,从而解决了射蜡机射蜡量不足的问题。同时由于添加了冷蜡条,减少了蜡件的收缩变形,从而提高了DN200水幕阀芯蜡件的尺寸精度。
Through the analysis of the shape, structure and precision casting process of DN200 water curtain valve, the DN200 water curtain valve wax mold has been designed rationally. The mold adopts three open molds and is precisely positioned by a conical positioning ring as a locating link. Wax mold manufacturing, according to the maximum amount of wax injection wax machine wax, hand-made a large number of irregular shape hard wax group, added to the mold cavity and then mold wax injection, wax solution to solve the problem of insufficient waxing machine The problem. At the same time as a result of adding a cold wax, reducing the shrinkage of wax deformation, thereby increasing the DN200 water curtain valve spool pieces of dimensional accuracy.