What is sand casting?

Sand casting is the process of using sand as a primary material for shaping various metal products. This forming method is very effective because sand is a refractory material, which means that it lasts very high temperatures. It is also a very economic process because it requires less costs and technology. The container can be made either of wood or metal in which a relief pattern is placed. The sand is then poured onto the formula. Usually other elements such as water and clay are added to make the sand more compact and solid.

There are two common methods of solidifying sand. The first approach is the use of green sand. The word "green" does not refer to its color, but is used as an indication of its moisture. To prevent sand from being too cold, only 2 to 4 percent of water are used. The casting of green sand generally produces a rough surface on the finished metal product.

Access to sand casting is commonly used, especially in factories and founders. This method uses dry sand, withField with other ingredients, such as clay and glue, to produce castings. When the mixture is poured into the container, it is often compressed to prevent holes. Sometimes the container is even vibration to create smooth and even casting. Many manufacturers prefer air casting because they create a smoother texture on the finished product.

For three -dimensional or irregular figures such as a cube or a metal hammer, a two -piece litis form is used. The upper and lower part of the mold contain halves of the pattern. When the parts are closed together, the hot metal is poured through a hole called "gate" and the metal is contained in the compartment until it cools down and solidifies.

Sand casting is usually destroyed after each use, but the sand itself is recycled to form another casting. This long process becomes a disadvantage if the product is to be made in large quantities in the short period. The usual metals that are occupied are aluminumEat, cast iron, cans and steel. Even bronze and copper can be cast on sand. Many metal tools, plumbing and even car parts are produced by casting sand. The 2003 reports show that more than 70 percent of metal castings are created by casting sand.