论文部分内容阅读
合成树脂应用于铸造行业已经有20年左右的历史了。这是由于人们认识到,这些结合力强的芯砂粘结剂对热的敏感性比普通的油类粘结剂更高。采用合成树脂作为芯砂的粘结剂具有许多优点,最主要的是减少了50%的烘芯时间,在不增加设备的情况下,芯子的产量能够提高一倍。但是,它的生产率还低于壳芯制芯法。最近,由于热芯盒制芯法的采用,生产率则高于壳芯制芯法。制芯方法的趋向是使芯子在芯盒中硬化,这样可以提高芯子的精确度。二氧化碳硬化、空气硬化、氯化氢硬化、壳芯和热芯盒制芯法都是如此。但是,热芯盒制芯法能够在很短的时间,如5秒钟之内做出精确的芯子,甚至对具有大截面的芯子也只需要30
Synthetic resin used in the foundry industry has been about 20 years of history. This is due to the fact that it is recognized that these cohesive core-sand binders are more thermally sensitive than conventional oil binders. The use of synthetic resin as a binder for core sand has many advantages, most notably a 50% reduction in heartburn time and a doubling of core production without additional equipment. However, its productivity is still lower than that of the shell core. Recently, due to the adoption of hot box core making method, the productivity is higher than the shell core making method. The tendency of the core making method is to stiffen the core in the core box, which can improve the accuracy of the core. Carbon dioxide hardening, air hardening, hydrogen chloride hardening, shell and hot core box core method are so. However, the hot box core making method can make a precise core in a very short time, such as 5 seconds, even for a core with a large cross section, only 30