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从1956年第一季度起,我們在鑄鋼件上采用了保溫胃口,使用的結果,不仅节約了大量的鋼水,对鑄件質量的提高也起了一定的作用。保溫冒口是用不容易傳热和能够發热的材料做冒口的型壁。在澆鑄后,使冒口部分的鋼水凝固的时間延長,这样就能充分發揮冒口的补縮作用,并且可以适当的减小冒口的体积。最初我們使用的方法,是在造型时,在冒口的四周撒上保溫材料。这种方法操作很不方便,而且保溫層不均匀。以后就改用保溫套的方法。保溫套
From the first quarter of 1956, we adopted the thermal insulation appetite on the steel castings, which not only saved a lot of molten steel, but also played an important role in improving the quality of castings. Insulating riser is not easy to heat and heat to the material to do riser wall. After casting, the riser part of the molten steel to extend the time, so that you can give full play to the feeding role of riser, and can properly reduce the riser volume. The initial method we used was to sprinkle insulation around the riser during molding. This method is very inconvenient to operate, and the insulation layer is not uniform. After the switch to the method of insulation sets. Thermal insulation sleeve