The casting method is prevalently used for making metal parts of varying shapes and complexity depending on its usage. Sand is used predominantly as it has many advantages over other materials.
Iron is cast and made into a lot of components and products. It has many uses in automobile industries and other industries as well. The iron ore is first treated to make it fit for casting.
The process of casting involves the use of very simple and affordable raw materials but requires high skills to carry off the actual procedure. Sand casting is mostly used to make mold holding for all kinds of components both big and small, right from automobile parts to big engines. You can know more about casting via www.redstonemanufacturing.com.
Sand casting has basic steps such as preparation of molten metal with the right chemistry. Then the sand mold is prepared by using a pattern that is just a copy of the shape of the final product. The mold is finally cooled and broken to take out the prepared product. Then the rough areas are polished and heat treatment is provided to the product.
Sand used is usually green sand which is wet. Sand is mixed with certain chemicals and prepared for pattern placing by various methods.
The most crucial part in the process of molding is pattern design and mold preparation. The pattern must be of exact size and shape for mold preparation. There are some differences in the final product that are deliberately marked to allow for the metal to shrink or adjust to the right size.
Then hot molten metal is poured into the pattern and allowed for cooling. The rough cast is polished or further treated. Also allowances are made for molten metal overflow and special space is created for it. Vents are also placed for the gases formed to escape.