The functions of coated sand casting can be roughly divided into the following types according to different categories:
Ordinary coated sand is composed of quartz sand, thermoplastic phenolic resin, urotropine and calcium stearate without relevant additives. It is suitable for producing general iron castings.
High strength low gassing coated sand is an updated product of ordinary coated sand. It is prepared by adding relevant additives and adopting new processes. Its strength is more than 30% higher than that of ordinary coated sand, and its gas generation is also significantly reduced. It is suitable for the production of complex precision iron castings.
High temperature coated sand has the characteristics of high strength and long heat resistance time at high temperature. It is suitable for the production of complex thin-walled iron castings such as automobile engine cylinder block, cylinder head and container angle.
The easily collapsible coated sand has good strength and excellent low-temperature collapsibility. It is suitable for the production of non-ferrous metal castings.
Other special requirements coated sand in order to meet the needs of different products, a series of special coated sand have been developed, such as coated sand for centrifugal casting, chilled coated sand, wet coated sand, anti sticking sand, anti vein, anti orange peel coated sand, etc.