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以前,我们在熔模铸造生产中,是采用8kgf/cm~2高压蒸汽脱蜡。铸件成品合格率在62.7～87％之间。其主要铸造缺陷是跑火、型壳变形和鼓胀等。而造成这些缺陷的除涂料质量、硬化液成分和浓度以及型壳的自然干燥(存放)时间等因素以外,其主要与脱蜡方式有关。热水脱蜡除了有时间过长、效率不高等不足之处外,还因加热用的蒸汽管常常漏水而降低了水中的氯化铵浓度,难以保证质量。蒸汽脱蜡,往往因自然干燥时间不够或吹气时间稍
Previously, we are in the investment casting production, is the use of 8kgf / cm ~ 2 high-pressure steam dewaxing. Casting finished pass rate of 62.7 ~ 87%. The main casting defects are running fire, shell deformation and bulging. Apart from such factors as the quality of the coating, the composition and concentration of the hardening liquid, and the natural drying (storage) time of the shell, these defects are mainly related to the dewaxing method. Hot water dewaxing in addition to a long time, the efficiency is not high and other inadequacies, but also due to heating the steam pipe often leaks and reduce the concentration of ammonium chloride in water, it is difficult to ensure the quality. Steam dewaxing, often due to lack of natural drying time or blowing a little time