消失模铸造冒口工艺改进的探讨及应用

在消失模铸造中为避免铸件产生气孔、夹渣、冷隔等缺陷，着重探讨将冒口改为大气压力冒口，并填入覆盖剂，使冒口除起补缩作用外，还有提高铸件保温、排气和集渣的作用，从而提高了铸件的成品率，并推荐了覆盖剂、砂芯基本材料和工艺配方案。

Discussion and Application on Runner for Lost Foam Casting

To prevent gas-hole,inclusion and cold shut in the castings in lost foam casting,air-runner was adopted and the cover-agent was filled into the runner to make the runner not only have the feeding effects but also improve the holding temperature,exhaust and collection slag,so the product yield is improved.Cover agent,basic materials for sand-core and technology were given.