Sand casting refers to a casting method in which castings are produced in a sand mold. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting.
Sand casting crusher wear-resistant parts are still very common in China, such as jaw plate, high-chromium blow hammer, crushing wall, rolling mortar wall, etc., because in the crusher equipment, as a relatively large wear-resistant casting, Relatively speaking, the accuracy is not very high, especially for the jaw plate, the finished product almost does not need lathe grinding, and the broken wall, rolling mortar wall, roll skin and the like only need lathe grinding in part of the casting, so it is especially suitable for sand casting. , Because the wear parts of sand casting jaw plate, high chromium plate hammer, crushing wall, rolling mortar wall, roller skin, etc. are more durable than other products such as lost foam casting. However, lost foam casting has high dimensional accuracy, small machining allowance, convenient dry sand falling out, cleaning and grinding workload is reduced by more than 50%, and labor costs are saved, so the price of lost foam casting is relatively low.
Sand casting is one of the casting processes. The mold used in sand casting is generally composed of an outer sand mold and a core. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is simple to manufacture, and can be adapted to single-piece production, batch production and mass production of castings, and has been the basic process in casting production for a long time. At present, in the international production of all castings, 60 to 70% of the castings are produced with sand molds, and about 70% of them are produced with clay sand molds.
The main reasons are: compared with other casting methods, sand casting has low cost, simple production process and short production cycle. Therefore, castings such as engine cylinder blocks, cylinder heads, crankshafts, etc. of automobiles are produced by the clay green sand process. When the wet type cannot meet the requirements, consider using the clay sand surface dry sand type, dry sand type or other sand type. The weight of castings produced by clay wet sand casting can range from a few kilograms to tens of kilograms, while the castings produced by clay dry casting can weigh dozens of tons. Because sand casting has the above advantages, it is more and more widely used in the foundry industry. In the future, it will play an increasingly important role in the foundry industry.
