What are the advantages and disadvantages of ceramic foundry sand and quartz sand for casting?
With the development of foundry industry, there is such a situation that many foundry enterprises have abandoned the traditional quartz sand, and have chosen ceramic foundry sand as the casting material. What are the advantages and disadvantages of ceramic foundry sand and quartz sand for casting? Today I will analyze it with you. In fact, both ceramic foundry sand and quartz sand have their own disadvantages and advantages when used in the lost foam casting, but the overall effect of ceramic sand is much better than that of quartz sand.
Ceramic foundry sand is the first choice of molding sand in the lost foam casting.Ceramic foundry sand has perfect spherical shape good,which which ensures the smoothness of the casting; The refractoriness of quartz sand is lower than that of ceramic foundry sand.Quartz sand can be called silica sand from the geological point of view.Silica sand is a kind of raw sand, which is the largest amount of raw materials for foundry production. Because the main component of silica sand is quartz mineral, it is called quartz sand in geology. Quartz sand is divided into foundry sand and glass sand according to its performance, composition and usage. Quartz sand as molding sand has the advantages of wide distribution and low cost; But its shortcoming is also quite obvious: First, the coefficient of expansion is big, the casting precision is low; Second, the sand penetration on the surface of the casting is severe and difficult to clear.
Ceramic foundry sand is a kind of artificial sand, first used in petroleum mining, and recently used as foundry sand. Ceramic foundry sand has advantages and disadvantages, because the surface finish is too high, so the particle size and strength is not very good grasp, the technical requirements of coated sand are relatively high. The advantage is that the thermal expansion is small, which has a great effect on improving the accuracy of casting. The effect of ceramic foundry bead sand is better than that of quartz sand, and ceramic foundry sand is often used as molding sand in the lost foam casting process.