作者对用于制作型芯的新型自硬砂粘结剂—环氧树脂、稀释剂、固化剂、附加物等进行了探讨,并对树脂砂的常温、高温性能进行了测试。指出该树脂砂具有比低氮呋喃树脂砂高的高温抗弯强度和粘结强度,较长的可使用时间,从而为防止复杂型芯的变形(浇注时的高温变形),减少树脂用量,提供了一种新的树脂粘结剂 The authors discussed the new self-hardening binders used for core making - epoxy resin, thinner, curing agent, additives and so on. The properties of resin sand at room temperature and high temperature were also tested. It is pointed out that the resin sand has higher high temperature bending strength and bond strength than low nitrogen nitrogen resin sand and long service life, so as to reduce the amount of resin used to prevent the deformation of the complicated core (high temperature deformation during casting) A new resin binder