吉林工业大学铸造七五级工农兵学员,深入长春汽车厂铸造分厂开门办学,在生产实践中发现,采用热芯盒制芯的缸体1、2号砂芯、汽门室部位粘砂严重,不得不增加刷涂料和二次烘干工序,这样粘砂问题仍不能解决。他们同老师傅共同分析,认为1、2号芯受铁水冲 Jilin University of Technology founding 75 workers and peasants and soldiers, in-depth Changchun Automobile Factory Foundry Branch opened the school, found in practice, the use of hot core box core cylinder No. 1, 2 sand, grate chamber Department of sticky sand serious , Had to increase the brush coating and secondary drying process, so sticky sand problem still can not be solved. They share the same analysis with the master, that the first and second cores by hot metal rush