What are the characteristics of sand casting?

Sand casting is a metal casting process that uses sand as the modeling material. A factory specializing in sand casting is generally called a foundry. In the world, the castings produced by sand molds account for more than 80% of the castings produced by various casting molds.

• What are the characteristics of sand casting?

• What are the advantages and disadvantages of sand casting, fine casting and investment casting?

• What are the main components of sand casting?

What are the characteristics of sand casting?

Sand casting is one of the casting processes, sand casting used by the general combination of external sand and core. Because of the sand casting molding materials used inexpensive and easy to obtain, casting manufacturing is simple, the production of single pieces of castings, batch production and mass production can be adapted to, for a long time, has been the basic technology in the production of casting. At present, in the production of all castings, 60 to 70% of the castings are produced with sand, and about 70% of them are produced with clay sand.

What are the advantages and disadvantages of sand casting, fine casting and investment casting?

Casting is to melt cast iron or steel and pour it into a pre-prepared mould shell, after cooling, remove the shell and become a part blank, using this process to reduce the amount of processing, especially the shape of the curved surface of the more difficult to process parts using casting to solve the processing difficulties, and improve production efficiency, sand casting is to use quartz sand to make the sand mold can be poured after drying, characterised by simple and low cost, the shape is relatively rough precision requirements can be used. Not high precision parts can be used, investment casting is made of plastic foam mold tire exterior rolled on the coating, dried into the sand box vacuum on the sand box and then cast, high temperature iron will foam combustion into gas after cooling into parts this casting is also called vacuum casting, higher cost combustion of gas on the environment, precision casting is also known as wax casting, made of paraffin wax mold tire and then rolled on the coating and quartz sand Cooled and dried and then dewaxed to become the shell, iron poured into the cooling of the shell will be knocked off the parts, the parts made by this process have a good appearance of finish, accurate size, so called precision casting.

What are the main components of sand casting?

From design, an engineer or designer, or a skilled stencil maker makes the stencils used to produce the product, they may use wood, metal or plastic or even expanded polystyrene. Sand can be sanded, swept or scraped out of shape. Since metals shrink as they solidify, uneven cooling can also cause uneven shrinkage. Therefore, the sand casting pattern must be slightly larger than the final product size, and this difference is both the shrinkage. Sand-casting pattern makers can use a "scaler" (sometimes called a "shrink gauge", which is manufactured with dimensions enlarging the spacing marks by the desired percentage increase) to make a suitable pattern. Different scales are used for different metals because each metal and alloy has a different overall shrinkage rate.

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