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保温冒口与普通冒口的区别在于保温冒口由保温材料制成而普通冒口则是由与铸型相同的造型材料制成。前者能在有效地控制冒口中钢液的热损失、延长冒口凝固时间、强化补缩铸件的同时把不直接发生补缩作用的钢液消耗减少到最低限度。在砂型铸造铸钢件生产中,砂型冒口改为保温冒口后,其工艺出品率可比原工艺提高10～16％(厚壁铸件、大热节铸钢件趋于上限)、生产成本下降。
The difference between a heat-riser and a common riser is that the heat-holding riser is made of heat-insulating material and the common riser is made of the same molding material as the heat-shrinkable die. The former can effectively control the heat loss of molten steel in the riser, extend the riser solidification time, and strengthen the shrink casting while minimizing the consumption of molten steel which does not directly cause the shrinkage. In the production of sand casting cast steel, the riser of sand is changed into the riser of heat preservation, the yield of its technology can be increased by 10-16% compared with the former technology (the upper limit of thick-walled castings and large hot-rolled steel castings tends to upper limit) and the production cost is reduced .