抄録
In the supply of green sand to the metal flask, aeration which introduces low pressure compressed air not only from the top of the sand tank but from the side as well is performed. Because the aeration reduces friction resistance acting on the taper of the sand tank and air pressure is low, the green sand in the sand tank is not compacted. In this study, filling experiments by aeration were conducted to compare free falling and blowing to the flask. The experiments clarified that aeration is effective for filling narrow cavities. The relationship between the aeration pressure and bulk density in narrow cavities was clarified and the condition of the aeration filling was optimized. Computer simulation was also performed using the distinct element method. The mechanism of the aeration filling was clarified from the experiments and analysis.
