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Correct Selection of Raw Material For Resin Bonded Sand Casting Process Can Reducing Casting Cost

Release time： 2020-06-13 10:04:00.000

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Correct selection of raw materials for resin bonded sand casting process is the basis of reducing the cost of resin bonded sand casting. The choice of raw materials has a greater impact on the cost of casting, which has been recognized by the vast majority of peers, because the quality of raw materials, on the one hand, affects the addition and consumption of various materials, on the other hand, affects the quality of castings.

Resin bonded sand is widely used as mold (core) sand in modern casting production.The casting will not have expansion defects when the molding sand is prepared with the ceramic foundry sand. Ceramic foundry sand is a neutral material,and both acid and alkali binder can be used with . Ceramic foundry sand also has a special advantage, that is, it is not broken, no dust, can be recycled repeatedly, recycled for hundreds of times, and the cost performance is naturally high.Compared with chromite sand and zircon sand, the price of ceramic foundry sand is only 25-50% of zircon sand and chromite sand. At the same time, since the sand grain is spherical and the surface area is small, the added amount of resin can be reduced by 30-50%, and the added amount of water glass is less than or equal to 4%; As a result, the casting defects caused by the binder are reduced and the rate of finished products is increased. Ceramic foundry sand has many advantages, such as high refractoriness which can reach more than 1820℃ and easy to collapse; Wtith the mullite phase much higher than that of sintered products, ceramic foundry sand has good refractoriness, high thermal conductivity, good stability, no cracking and so on.

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