The sand inside the sand mold is not cleaned thoroughly, and there are residual sand and gravel. During the pouring process, it is caused by the iron liquid washing the molding sand on the pouring channel wall. Some use coating to prevent it, achieving good results, but there are still cases of sand inclusion in castings because coating the gate is relatively difficult and arduous.
Method: Increase the yield of castings, improve the quality of castings, and reduce the total cost of castings; The use of cast gate ceramic pipes makes the product very convenient to use, with characteristics such as smooth flow, resistance to molten iron, steel erosion, and no absorption of molten steel. It can simplify the molding process, save the difficult work of coating the inner side of the gate, and improve the layout of the pouring system to avoid sand flushing of the casting. This can fundamentally solve the problem of sand inclusion.