OEM stainless steel casting with silica sol process is more advanced than the traditional process, the product quality is high, and the processing demand is small. Stainless steel casting silica sol investment casting for water pump impeller valve body is a casting method in which the shape and size of the product are relatively close to the dimensional accuracy among many casting methods. The production process of precision casting is also very different from the traditional production process. The determination of the pouring surface of precision casting affects the quality, dimensional accuracy and difficulty of molding process of custom stainless steel silica sol mechanical castings. The pouring position will be different according to the selection principle. When the important processing surface or the main processing surface of the silica sol precision casting is poured downward or on the side, the gas, slag in the molten metal and sand in the mold will float up, which may cause pores, slag inclusions, and sand holes in the upper part of the casting. And other defects, and the possibility of defects in the lower part of the casting, the structure is denser. The pouring position of the machine bed should have the guide rail face down to ensure the quality of this important working surface. The quality requirements of the circumferential surface are relatively high, and the vertical pouring scheme is adopted to make the circumferential surface on the side, and the quality is uniform.

In order to obtain better appearance quality, some foundry silica sol lost wax investment precision carbon steel metal stainless steel casting need to go through pickling process, and then go through electroplating, enamel, rolling and other processes. Pickling of precision castings is also a complicated process. Pickling is an important link in the processing of precision casting parts, which is related to the quality of subsequent products. Therefore, for the pickling process, it is necessary not only to pay attention to the safe operation in production, but also to pay attention to the operation quality of the pickling process.