传统的顺序凝固原则，是按热节圆比例放大的方法确定厚大铸铁件的冒口，其中存在错误。
According to conventional sequence solidification principles, de-signing riser size of heavy castings by proportionally magnifying the heat center circle is wrong.
将当量热节概念应用于冒口设计，提出了冒口的当量热节设计法。
An equivalent hot spot design method for riser was designed through application of equivalent hot spot in riser design.
铸钢皮带轮，壁厚不匀，热节点多，补缩通道狭窄，很难用设置冒口的方法给予补缩。
Cast steel pulley with wall unevenness, many hot pitch points and narrow feeding channel is difficult to be fed by setting up a head.
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