熔模铸件砂眼缺陷分析

Sand Hole Defects Analysis of Investment Casting

阐述了熔模铸造铸件出现砂眼缺陷的特征与出现的部位,分析了砂眼缺陷产生的内、外部原因并提出了相应的对策。结果表明,砂眼是由于型壳内、外部的型砂和/或耐火材料进入型腔形成的,尽量减少影响型壳质量的人为因素,提高型壳质量是防止铸件砂眼最有效的措施。

The characteristics and parts of sand hole defects in investment casting were described,the internal and external causes of sand hole defects were analyzed,and the corresponding countermeasures were put forward.The results show that the sand hole defects are formed when molding sand and/or refractory materials from inside and outside the mold shell entered the mold cavity.Minimize the human factors affecting the quality of mold shell,the most effective measure to prevent casting sand is to improve the quality of mold shell.