国内用呋喃—Ⅰ型树脂做热芯盒制芯的粘结剂,已很普遍。但由于呋喃—Ⅰ型树脂含氮,对于球铁或铸钢件易产生皮下气孔,故国内个别工厂,只得采用不含氮的呋喃—Ⅱ型树脂,生产铸钢件砂芯,即热芯盒法制得的实心砂芯。本试验是用无氮热固化呋喃树脂做热芯盒法制芯的粘结剂,做出球铁砂型用的壳芯,这在国内还是未曾有过的。经过多次试验,浇出了某产品铸件,通过各项性能检验,不仅符合原产品的质量要求,而且,比原工艺在提高产品质量和生产效率,降低工人劳动强度,节约能源方面均有显著效果,综合成本亦有降低。劳动环境也大有改善。 Domestic furan-I-type resin made of hot core box core binder, has been very common. However, furan-Ⅰ type resin containing nitrogen, for ductile iron or steel castings prone to subcutaneous, so the domestic individual factories, only nitrogen-free furan-Ⅱ type resin, the production of steel sand castings, namely the hot-box Legal system made of solid sand core. This experiment is to use nitrogen-free heat-curing furan resin hot core box made of the core binder, made of iron sand core shell, which in the country or have never had before. After many tests, cast a product casting, through the performance test, not only in line with the quality requirements of the original product, and, than the original process in improving product quality and production efficiency, reduce labor intensity, energy conservation were significant Effect, the overall cost also decreased. The working environment has also greatly improved.