1概述下水道篦板需求量大,用传统的砂型铸造生产,效率较低。消失模铸造技术具有生产周期短的特点,在批量生产中尤为显著。利用消失模铸造生产下水道篦板,显著缩短了生产周期。篦板结构见图1,壁厚为20mm,材质为HT250。其技术要求为:①篦板表面平整,变形量小于5mm,无粘砂、多肉等铸造缺陷;②孔内壁光滑,无粘砂缺陷。 1 Summary Sewer grate demand, with the traditional sand casting production, less efficient. Lost foam casting technology has the characteristics of short production cycle, especially in mass production. The use of lost foam casting sewer grate plate production, significantly shortening the production cycle. Grate plate structure shown in Figure 1, the wall thickness of 20mm, made of HT250. The technical requirements: ① grate plate surface is flat, the deformation is less than 5mm, no sticky sand, meat and other casting defects; ② pore wall smooth, non-stick sand defects.