Comparing to slurry prepared ordinary 830 silica sol and the production of castings

SKP27-3 surface layer silica sol has higher stability

excellent coating properties and insensitivity to drying conditions

of which the performance and effect. After verification of batch production of castings

the stability of slurry prepared with SKP27-3 surface layer silica sol reach up to 62 days. The cavity surface of the prepared shell is smooth and dense

and the one-time yield rate is greatly improved. The statistical defect rate of batch production casting is below 4.45%

and the casting repair rate is greatly reduced

while the casting defect rate of 830 silica sol is higher than 11.72%

indicating that SKP27-3 surface layer silica sol has a high advantage.