薄肉アルミニウム合金の消失模型鋳造法における湯流れに及ぼす塗型の断熱性の影響

抄録

  The effect of heat insulating coat on mold filling in the expendable pattern casting process of thin wall aluminum alloy castings was investigated experimentally. Thin wall aluminum alloy plates were cast by the EPC process, using several insulating and normal coats with different permeabilities. The fluidity length and melt velocity were measured. The distances of melt flow stop were predicted based on the heat transfer from the molten metal to the mold through the coat, using measurement melt velocity values. As a result, the effect of heat insulating coat on the fluidity length of melt was not significant. This is also verified from the predicted distances of melt flow stop.