红色硬化方法(如此称谓是因为制成的泥芯是红色)已经发展到可满足今日铸造厂家所面临的环境的挑战。它主要是以气体硬化热固树脂为基础的一种粘结方法,热稳定性好,而且散发烟雾气味很少。红色硬化方法除了对环境保护好以外,还有许多有利于铸造生产的特征。强活性的酚醛型化合物和它们的共聚物用作粘结剂,在酸性状态下靠添加甲醛给予体来硬化。低沸点的缩醛如甲缩醛起到甲醛给予体的作用。不使用有机溶剂,游离的苯酚和游离的甲醛都不存在于粘结剂中。该工艺过程由三部分组成: (a)Ⅰ号红色硬化——该树脂含有一种强活性酚醛化合物的水溶剂; (b)Ⅱ号红色硬化——该酸含有各种类 The red hardening method (so called because the resulting mud core is red) has been developed to meet the challenges faced by foundry manufacturers today. It is mainly based on a gas-cured thermosetting resin bonding method, thermal stability, and the smell of smoke is very small. In addition to good environmental protection, there are many features that contribute to casting production. Strongly active phenolic compounds and their copolymers are used as binders and are hardened in the acidic state by the addition of formaldehyde donors. Low-boiling acetals such as methylal function as formaldehyde donors. Without the use of organic solvents, both free phenol and free formaldehyde are not present in the binder. The process consists of three parts: (a) red No. 1 hardened - an aqueous solvent of a strongly active phenolic compound; (b) red hardened - the acid contains various types of