Improvement of feeding effect of riser in Expendable Pattern Casting of cast iron

摘要

About the riser initiation of effective ways to improve the model and in the disappearance of cast iron casting. The method of the present invention, and a molded article made of a mixture of aluminum powder and iron oxide powder in a thermite reaction of aluminum and iron oxide, characterized in that by inserting a feeder head for supplying thermal energy to the feeder head. According to the present invention, in the casting chamber model improves the effect of the feeder head by leaps and bounds by the hot water supply as well as to improve the quality of the cast product, because it reduces the size of the feeder head and the recovery rate increases, the sleeve material and the other shaping heat working can be installed by simply inserting the riser in the final stages of the work by the operator easy, complete coagulation product was separated from the riser is aluminum oxide (Al ₂ O ₃ ) be easily separated into the slag in the process, so it is advantageous to recover dissolved material recycling.