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铸钢件冒口的重量一般为铸件重量的60～120％,而普通冒口仅将其重量的14～20％用于对铸件的补缩,因此,在保证铸件质量的前提下,提高冒口的补缩效率,减少冒口的重量一直是广大铸造工作者研究的课题。五十年代采用的发热冒口,由于价格昂贵,浇注后产生大量烟雾污染环境,逐渐被现在广泛采用的保温冒口所代替。保温冒口可使冒口重量减小50％,铸件收得率一般可提高15％左右。这样在很大程度上提高了铸钢车间的产量和收益。我国每年生产
The weight of the steel riser is generally 60 to 120% of the weight of the casting, while ordinary riser only 14% to 20% of its weight for casting the casting, therefore, to ensure the quality of castings, Mouth of the efficiency of feeding, reducing the weight of riser has been the majority of casting workers research topics. The fiery risers used in the 1950s were replaced by the now widely used thermal risers due to their high cost and the large amount of smog polluted environment after pouring. Insulating riser can make riser weight reduced by 50%, casting yield generally increased by about 15%. This greatly improves the yield and profitability of the foundry. China’s annual production