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一、前言飞翅是树脂砂型(芯)铸件最主要的缺陷之一。它是因铸型表层在加热过程中形成热应力而导致铸型产生裂纹引起的,它与树脂砂在高温下的开裂倾向大小密切相关。为此,树脂砂的开裂倾向大小的评价方法及检测技术已成为铸造工作者共同关心的问题。铸造工作者曾在这方面作了不少工作。为了防止某种铸造缺陷的产生,要求直接了解促成其产生的条件,一般采用工
First, the foreword Fin is resin sand (core) casting one of the most important defects. It is caused by the mold surface cracks caused by the formation of thermal stress in the mold surface during heating, which is closely related to the cracking tendency of the resin sand at high temperature. Therefore, the evaluation method and testing technology of resin sand’s tendency of cracking tendency have become common concerns for foundry workers. Foundry workers have done a lot of work in this area. In order to prevent the occurrence of a casting defects, requiring direct understanding of the conditions that led to its production, the general use of workers