前言目前国内铸造行业广泛地采用热芯盒射芯工艺。但从各厂使用情况来看,尚存在着树脂货源短缺,且有的树脂发气量大易产生气孔和皮下气孔等缺陷。对此,我们与天津市农机汽车公司铸造短训班学员一起经过一个阶段的试验,成功地找到了一种货源广、发气量低的新型树脂——苯基苯酚甲醛树脂。并且为国内有 Preface At present, the domestic casting industry widely used hot core box core technology. However, the use of the plant point of view, there is still a shortage of resin supply, and some large amount of resin gas easy to produce stomatal and subcutaneous pores and other defects. In this regard, we and Tianjin Agricultural Machinery Company cast short training students together through a phase of the trial, successfully found a wide supply, low gas production of a new type of resin - phenyl phenol formaldehyde resin. And for domestic