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一、概述 四平市铝制品厂为了大量发展铝锅盖生产,以满足城镇、农村市场的需要,将用耐火砖粒和黄泥为主要材料做成的寿命较低的泥型改成使用寿命较长的耐火泥铸型后,生产出的八印和十印铝合金锅盖,在边沿处经常出现凹坑缺陷,由于这种缺陷造成的废品率高达90％以上,为了尽快地帮助工厂解决这一问题,我们对挤压铸造铝合金锅盖边沿出现凹坑缺陷进行了研究。发现,这种“凹坑”缺陷与铸型烘干工艺、浇注温度、铸型工作温度等工艺参数均无明显关系,而是与锅盖本身的结构形状有直接关系。本文介绍的就是这方面的工作。
I. Overview Siping City aluminum products factory in order to develop a large number of aluminum lid production to meet the needs of urban and rural markets, will use refractory brick and yellow mud as the main material made of lower life mud type into service life than Long refractory mud cast, produced eight Indian and ten printed aluminum pan lid, often in the edge of the pit defects, as a result of this defect rate of up to 90% or more, in order to help factories to solve this as soon as possible As a matter of fact, we have studied the occurrence of pit defects at the edge of squeeze cast aluminum alloy pan. It is found that this “pit” defect has no obvious relationship with the mold drying process, pouring temperature, working temperature and other process parameters of the mold, but has a direct relationship with the structural shape of the pot itself. This article describes the work in this area.