What are the characteristics of large casting manufacturers?
Large casting manufacturers prefer sand casting. According to statistics, 60-70% of the castings are produced in sand, and about 70% of them are produced in clay sand. The main reason is that sand casting has lower cost, simple production process and shorter production cycle than other casting methods. Therefore, the engine cylinder block, cylinder head, crankshaft and other castings like the automobile are produced by the clay wet sand process. When the wet type does not meet the requirements, consider using a clay sand table dry sand type, dry sand type or other sand type.
Castings from large foundry clay wet sand castings can range from a few kilograms up to tens of kilograms, while clay dry castings can weigh up to several tens of tons. Generally speaking, for medium and large castings, cast iron parts can be made of resin self-hardening sand type, and steel castings can be produced with water glass sand type, and castings with precise dimensions and smooth surface can be obtained, but the cost is high. Of course, casting precision, surface finish, material density, metallographic structure, and mechanical properties of sand casting are often poor. Therefore, when these performance requirements of castings are higher, other casting methods should be used, such as investment casting. Wax) casting, Die casting, low pressure casting, etc.
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