한국주조공학회

Casting defects, which are closely related to entrapped air bubbles and metallic oxides, oxides, occur very frequently in the casting process. Many researchers have shown that these defects can be reduced by adopting an appropr appropriate gating system design. But, it is difficult for field engineers to identify a specific gating system that is more appropriate for their produc products. In this study, we tried to draw a comparison of gating system designs with and without ceramic foam filters. A ceram ceramic foam filter was added to the horizontal runner just after the sprue to prevent air bubble generation and to reduce turbulence with without change of the gating system design. To verify the effects of initial pouring velocity, the experiment was conducted wit with four different amounts of water volume in the reservoir. Results of the water modeling experiment applying the filter showed re remarkably changed flow characteristics. Although the study confirmed that use of the filter may change the flow c characteristics, it needs to be noted that only filter use alone cannot solve all the problems caused by a poorly designed gating system.

Water modeling experiment, Flow pattern, Bubble, Air porosity, Filter