Weifang Sheng hang casting materials Co., Ltd.   

        Weifang coated sand long is currently the main varieties Chinese commercialization of coated sand as follows:
(1) the general category of coated sand
by quartz sand, novolak resin, urotropine and calcium stearate composition, without relevant additives. Applicable to the production of ordinary cast iron.
(2) with high strength and low gas coated sand
is the product of the common coated sand update, by joining the relevant additives and prepared to adopt new technology, the strength of precoated sand than ordinary high above 30%, gas is obviously reduced, suitable for the production of complex precision cast iron.
(3) high temperature type coated sand
has high strength, heat resistance and long time under high temperature, suitable for the production of automobile engine cylinder block, cylinder head, container corner complex thin-wall castings.
(4) easy collapsibility kinds of resin coated sand
has better strength, and excellent low temperature collapsibility, suitable for the production of non-ferrous metal castings.
(5) and other special requirements of coated sand
in order to meet the needs of different products, developed a series of special resin coated sand with precoated sand, such as: chilled precoated sand, wet film coating sand, sand, anti - veining, anti cellulite coated sand centrifugal casting.
also in 2004 the newly launched fast curing of resin coated sand in foundation with the properties of the curing speed of 30-70% can be improved, effectively improve the production efficiency, and save energy.