Can chromite sand solve the surface quality problems of castings?

The new type of chromite sand process uses 40/70 mesh chromite sand as the surface sand, 30/50 mesh natural silica sand as the back sand, and hardened alkaline phenolic resin as the binder, which is suitable for traditional sand casting The process was modified. The results show that the surface quality of the castings has achieved good results, and mechanical sand and iron inclusions are completely avoided. 400 improved to Ra25-100μm.