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Sand casting presentation from Dandong Iron Casting Group
Product name：Sand casting,metals casting,hengrui sand casting The basic raw materials used to make sand are foundry sand and sand binders. The most commonly used foundry sand is siliceous sand. The high temperature performance of silica sand can not meet the requirements of the use of zircon sand, chromite, corundum and other special sand. In order to make the sand and core made of a certain strength, the handling, molding and pouring liquid metal will not be deformed or damaged, generally add sand binder in the casting, the loose sand bonded to become sand. The most widely used sand binder is clay. Various dry or semi-drying oils, water-soluble silicates or phosphates, and various synthetic resins can also be used as binder for the sand. Sand casting used in the sand by the sand used in the binder and the strength of the different ways are divided into clay wet sand type, clay dry sand type and chemical hardening sand type. Sand casting is a casting process, the sand casting mold used by the outer sand and the core is usually a combination of. As the molding materials used in sand casting are cheap and easy to be obtained, the molds are easy to manufacture and can be adapted to single piece production, mass production and mass production of castings. For a long time, they have been the basic process in casting production. Currently, internationally, 60 to 70% of all castings are produced from sand and about 70% are from clay sand. The main reason is that: sand casting cost less than other casting methods, the production process is simple, short production cycle. So like a car engine cylinder block, cylinder head, crankshaft and other castings are made of clay wet sand process. When the wet type can not meet the requirements and then consider the use of clay sand table dry sand, dry sand or other sand. Clay wet sand castings can weigh from a few kilograms to tens of kilos, while clay dry castings can weigh tens of tons. Because of the above advantages of sand casting, so, it is more and more widely used in foundry industry. The future, it will play an increasingly important role in the foundry industry