Aluminum castings often encounter air oxidation welding bumps. Most of this material is dispersed on the surface of aluminum castings, and some are scattered around the corners where there is no ventilation. Most of its port numbers are Shows yellow or off-white. It can be seen in the case of mechanical processing and manufacturing. It can also be found in the case of pickling passivation or acid treatment to find the reason for the steel mold condition of such aluminum castings. There are several aspects: the material in the furnace is not clean and tidy , The use of recycled waste is too large; the pouring system software of the design plan is not very effective; the slag in the aluminum alloy liquid of aluminum castings is not cleaned and clean; in the case of pouring, the actual operation is not enough to cause the slag to be removed. Take it; and it's not long to avoid silence after the scouring and deterioration treatment.

Generally speaking, if this kind of problem is to be dealt with reasonably, everyone must grasp the effective standard pouring rate, and minimize the inclusion of steam as well; organic chemicals cannot be mixed in the core sand. For this reason, the raw material gas supply is reduced; the core sand exhaust pipe function is improved to make it stronger; the high-quality cold iron is effectively used; the disadvantages of the design scheme of the gating system software are improved.