Abstract
The use of filters offers a means of cost-effective production by reducing inclusions in castings. The wide application of ceramic foam filter is based on its structure that allows a high filtration efficiency. In this study, the relation between inclusions removal and flow behavior has been studied experimentally and analytically. In the model experiment, aluminum alloy containing alumina particles was poured into the mold with ceramic foam filter inserted vertically or horizontally. And, the distribution of inclusions in the filter was discussed based on the measurement of the sample and the volume flow ratio by the simulation analysis. As the result, at high flow rate where inclusions removal by gravity separation is not dominant, it was possible to estimate the distribution of inclusions by simulation analysis. However, estimation was difficult at low flow rates. It was also found possible to remove inclusions of about 90 % by the reasonable selection of the setting pattern and pore size of the filter and flow rate.
