1, ordinary sand casting, using sand as mold material, also known as sand casting and sand turning, including wet sand mold, dry sand mold and chemically hardened sand mold, but not all sand can be used for casting. The advantage is that the cost is lower, because the sand used in the mold can be reused; The disadvantage is that the mold is time-consuming, and the mold itself cannot be reused, and the finished product can only be obtained after it is destroyed.
2. Special casting can be divided into two types according to molding materials: special casting with natural ore as the main molding material (such as investment casting, clay casting, shell casting, negative pressure casting, full mold casting, ceramic mold casting, etc.). ) and special casting with metal as the main mold material (such as metal mold casting, pressure casting, continuous casting, low pressure casting, centrifugal casting, etc. ).
Extended data:
Casting is a method of forming liquid metal. Among various casting methods, sand casting is the most commonly used. This is because sand casting has almost no restrictions on the shape, size, weight, alloy type and production batch of castings.
However, with the development of science and technology, higher requirements are put forward for castings, which require more accurate castings, better performance and lower cost. In order to meet these requirements, foundry workers have invented many new casting methods, which are collectively called special casting methods, that is, special casting.
Commonly used special casting methods include investment casting, gypsum casting, ceramic casting, lost foam casting, metal casting, pressure casting, low pressure casting, differential pressure casting, vacuum suction casting, extrusion casting, centrifugal casting, continuous casting, semi-continuous casting, shell casting, graphite casting, electroslag casting and so on.
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