在大、中型平板类铝铸件中,表面积渣是经常产生的缺陷,特别是变质处理后的铝硅合金更易产生。去年我厂用铝硅合金生产800×300×25毫米的大座板,就因上平面积渣严重而报废多件,针对这个问题,我们除改进浇注系统,保证平稳和快速充满铸型外,主要是在直浇口和横浇道上安置玻纤过滤网,解决了该铸件的积渣问题。采用的玻纤布材料规格如表1,表2 In large and medium-sized flat-type aluminum castings, the surface area slag is often produced defects, especially metamorphic Al-Si alloy easier to produce. Last year, our factory used aluminum-silicon alloy to produce 800 × 300 × 25mm big seat plate, which was scrapped due to serious slag on the upper plane. In response to this problem, in addition to improving the casting system and ensuring a smooth and rapid filling of the mold, Mainly in the sprue and runner placed glass fiber filter, to solve the slag accumulation problems. The use of glass cloth material specifications shown in Table 1, Table 2