Within the framework of the diploma thesis, we compared the flow of the melt with different placement of the gating system in the sand mold. We used two gating systems, divergent and convergent, where we observed the difference in melt flow during casting. We also compared the experimental part with the results of numerical calculations, which were in agreement with the obtained experimental results.
With the plate product, we wanted to observe how the melt circulates in the casting cavity. We did not observe melt circulation, as described by the theory. We believe that the cause is the effect of surface tension and/or surface oxidation and the size ratio of the models.
When casting blocks, each of which had its own inlet channel, we wanted to achieve uniform filling of each block, while changing the cross-sections of the inlet channels and the placement of the gating system. The results showed that in our cases, on average, the divergent gating system was better, which also agrees with the theory. Nevertheless, in some of the gating system layouts, the convergent gating system showed us more even filling results. With this we have come to the conclusion that in general we can say that the divergent gating system is a better choice, but we must keep in mind that this is not the case in all cases.
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