Mineral Refractories Coated Sand

With a sole aim in delivering quality products, we are the prominent Exporter of Coated Sand in Gongyi, Henan, China.
Coated sand, sand surface in the shape of the front is covered with a layer of solid resin sand or sand core. Cold and hot two lamination process: cooling method using ethanol to dissolve the resin and in mixed sand adding Urotropine, second is coated on the surface of the sand, the ethanol volatilization, coated sand; thermal method to sand preheated to a certain temperature, and resin to melt, mixing the resin is coated on the surface of the sand, and Urotropine solution and lubricant, cooling, crushing and sieving of coated sand. Used for steel castings, cast iron parts.
Characteristics of coated sand
1, vibration cleaning, high strength, low gas, low expansion;
2, and good casting surface finish;
3, shell type is not up, good thermal stability, good thermal conductivity, good mobility, surface roughness of castings;
4, high strength, high temperature resistance, low expansion, good release properties, good resistance to sand;
5, uniform shell noshelling, curing speed;
Coated sand material
Resin coated sand used mainly high-quality selection of natural quartz sand as raw sand, thermoplastic phenolic resin, urotropine and enhanced agent as raw materials. According to different technical requirements of the user, in the curing speed, de film, liquidity and scatters, casting surface finish, storage and other aspects of the adjusted ratio.