Sand Casting；sand Mold Casting；sand Mould Casting

In the total production of castings, 60~70% of the castings are produced with sand type, and about 70% of them are made of clay bonded sand for molding material production of castings. More than 80% of clay wet sand and over 73%. The main reason is that sand casting is low cost, simple production process and short production cycle compared with other casting methods. So the castings such as the car cylinder block, cylinder head, crankshaft and so on are produced by clay wet process. When the wet type can not meet the requirements of the use of table dry sand type, dry sand type or other sand type. Castings cast by clay wet sand can weigh from a few kilograms to dozens of kilograms, while dry clay production castings can weigh dozens of tons.
For medium and large castings, resin can be used from hard sand, steel casting can be produced with water glass sand, can obtain accurate size, smooth surface castings, but the cost is high.
Single small batch of production of heavy castings, is still an important method, manual modeling can adapt to a variety of complex requirements are more flexible, do not require a lot of process equipment. Can use sand type, VRH water glass sand, organic ester water glass self-hard sand, clay dry, resin self-hard sand and cement sand type; for single production of heavy casting, low cost and fast production. Mass production or long-term production of finalized products using multi-box modeling, split box modeling method is more appropriate. Although the mold, sand box began to invest high, but can be compensated from saving modeling hours and improving product quality.
Sand casting production, surface finish, material density, mechanical properties and other aspects are often poor, so when the performance requirements of the casting are higher, other casting methods should be adopted, such as melting mold (wax) casting, low pressure casting and so on.