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通过数学方法建立砂芯传热模型再现了砂芯在整个浇注过程中内部发生的各种变化,研究了铝合金铸件生产过程中浇注温度和溃散剂对酚醛树脂覆膜砂溃散性的影响。结果表明,提高浇注温度和使用具有强氧化性的溃散剂均能增加覆膜砂中树脂烧蚀层的厚度,这对研究酚醛树脂覆膜砂的溃散性很有意义。
The mathematical model of sand core heat transfer model was established to reproduce the internal changes of the sand core during the whole pouring process. The effects of pouring temperature and powder dispersant on the collapsibility of phenolic resin coated sand were studied. The results show that increasing the pouring temperature and using the strong oxidizing agent can increase the thickness of the resin ablated layer in the coated sand, which is of great significance to the research of the collapsibility of the phenolic resin coated sand.