由于冷硬呋喃树脂粘结剂具有一系列的优点,所以,目前我国冷硬树脂的研制和工艺试验工作已普遍展开,其应用也在逐步扩大之中。但与国际相比,技术水平上的差距,集中表现在粘结剂的用量上。以原砂为100,国外树脂加入量一般在2%以下,日本赤阪铁工所新砂树脂加入量仅为1.1%。随着旧砂回用次数的增多,树脂加入量还可 As the chiral furan resin binder has a series of advantages, so at present our country chilled resin research and technology test work has been carried out in general, its application is also gradually expanded. However, compared with the international, the technical level of the gap, focused on the amount of binder. The original sand is 100, the amount of foreign resin is generally below 2%, the Japan Akasaka Iron Works, the new sand resin added to only 1.1%. With the increase in the number of reuse of old sand, resin addition can be