An equivalent hot spot design method for riser was designed through application of equivalent hot spot in riser design.
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。
2
The equivalent hot spot method for riser design has the advantages of direct visual and simple calculation.
冒口的当量热节设计法，概念直观，计算简单。
3
The changes of place and size of casting hot spot with the time are based on structure of casting, material of mould and the position of gate and riser.