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使用双快水泥砂造型时,一遇到气温高,或制作比较复杂,操作时间较长的情况下,觉得双快水泥型砂的可使用时间短,操作十分紧张,而且常常因来不及操作而报废很多型砂。因此,为了满足造型要求,就必须延缓双快水泥型砂的硬化速度。这就要加入一定量的缓凝剂。我们本着因地制宜,就地取材的原则,分析缓凝剂的缓凝作用机理后,使用本厂现有材
The use of double fast cement sand modeling, a encountered high temperatures, or more complicated to make, the operation time longer, I feel Shuangkui cement sand can be used for a short time, the operation is very tense, and often because of too late operation and scrapped a lot molding sand. Therefore, in order to meet the modeling requirements, it is necessary to delay Shuangkui cement sand hardening rate. This will add a certain amount of retarder. We are in line with local conditions, the principle of local materials, analysis of retarder retarder mechanism, the use of existing materials plant