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在熔模铸造生产所产生的缺陷中,有时由于壳型的分层导致的废品要占相当大的比例。本文仅就我厂采用水玻璃-氯化铵硬化制壳进行熔模铸件生产十多年来,在解决壳型分层问题方面的一些实践和看法。 通常壳型分层在铸件外观上的表现为:当分层较轻时铸件上出现轻微的鼠尾纹或不太明显的凹陷;若分层较严重,这时壳型的第一层(有时第二层与第一层同时)向型腔
Among the drawbacks of investment casting production, there is sometimes a significant proportion of scrap due to shell-type delamination. This article only on my plant using water glass - ammonium chloride hardened shell for investment casting production more than 10 years, to solve the problem of shell-type delamination some of the practices and views. Shell shell stratification is usually the appearance of the appearance of the castings as: when the stratification of light castings appear mild or less obvious sunken potholes; if the stratification is more serious, then the shell of the first layer (sometimes The second floor and the first floor at the same time) to the cavity