ABOUT THE QUESTION CONCERNING THE TIME OF BLOWING THE LIQUID-GLASS MIXTURE
One of the reasons for obtaining low-quality castings in the CO2-process is the appearance of sodium bicarbonate in the molding mixture, which gives a fusible phase in the mixture, and it will reduce the strength properties of the casting. This phenomenon is associated with supersaturation of carbon dioxide supplied during purging. Eliminate the possibility of "Overblowing" will help the optimal supply of acidic reagent in the mixture. The ability of knowing and adjustment the time of blowing carbon dioxide into the liquid-glass mixture will simplify the technological process of obtaining a high-quality casting.