Cold core box is a high-efficiency core-making process. Compared with hot core box and shell core, it has the advantages of high efficiency, energy saving and good working conditions. It has been widely used in foundry production.

The core-making quality and core-making speed of the cold-box method are closely related to the ambient temperature, humidity, blowing temperature, blowing pressure, and blowing time. The measures that should be taken to ensure the quality of the sand core are: when the temperature of the original sand is high, it should be properly Shorten the storage time of the sand mixture; when the temperature of the original sand is low, the sand temperature regulator should be turned on to properly increase the sand temperature to ensure the hardening speed of the sand core; Blowing time; different blowing gas has different requirements for blowing temperature. SO2 is a gas at room temperature and does not need to be heated. Triethylamine and methyl formate are liquids at room temperature, which are easy to condense in the pipeline in winter. Temperature and heat preservation measures ensure that the content of triethylamine (methyl formate) in the hard blowing gas is relatively stable; the triethylamine method and the modified silicate sand blowing carbon dioxide/compressed gas composite blowing method are very sensitive to air humidity, and compression The air needs to be dehumidified.

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