长期来铸造生产技术发展缓慢,一次型砂铸工艺尤为突出。五十年代初,国外工业发达国家开始重视这方面的研究。改革传统的砂铸工艺的基础是发展新性能的造型材料和混合料。当代高分子化学和无机化学的巨大成就,为其突破奠定了科学基础。“铸造化学”的日趋形成足以说明这一事实。在此基础上,近二十年来各种新的有机系和无机系铸型相继出现,造型方法也不断得到革新。自硬型的普及和潮型高压造型的推广,应该说是近代铸型最显著的进步。它标志着砂铸 Long-term casting production technology development is slow, a sand casting process is particularly prominent. In the early 1950s, industrialized countries in foreign countries started to pay attention to this aspect of research. The basis of the reform of the traditional sand casting process is the development of new performance modeling materials and mixtures. The great achievements of contemporary polymer chemistry and inorganic chemistry have laid a scientific foundation for their breakthroughs. The growing popularity of “foundry chemistry” suffices to illustrate this fact. Based on this, various new organic and inorganic molds have emerged in the recent two decades, and the modeling methods are constantly being renovated. The popularization of self-hardening type and the popularization of influx of high-pressure tide type, it should be said that the most significant progress in modern mold. It marks the sand casting