Sand Casting

Sand casting is a metal part manufacturing process that involves creating a sand mold and pouring molten metal into it. This process is commonly used in the manufacture of parts made of bronze, steel, aluminum, and other metals.

The process begins with the creation of a model of the part to be made, usually made of wood, plastic or metal. This model is then placed in a mold box, where it is covered with a mixture of sand and binders to create the sand mold. The mold is allowed to dry and then the pattern is removed, leaving a hollow space in the mold that is the exact shape of the desired part.

Once the mold is ready, the metal is heated until molten and poured into the mold through a pour spout. The molten metal fills the empty space in the mold and is allowed to cool and solidify. Once the metal has cooled and solidified, the sand mold is broken to reveal the solid metal piece.

Sand casting is a versatile and inexpensive process used to make parts of a wide range of sizes and shapes. However, it may require some degree of post-finishing to remove burrs and improve the dimensional and surface accuracy of the part.


Sand casting has several advantages compared to other metal part manufacturing processes. Some of these advantages are:

  1. Design Flexibility: Sand casting allows for the production of metal parts of complex shapes and large sizes that can be difficult to fabricate using other manufacturing processes.
  2. Cost: Sand casting is an inexpensive process compared to other processes for manufacturing metal parts, especially in large quantities.
  3. Variety of Metals: Sand casting can be used on a wide variety of metals, including iron, steel, aluminum, copper, brass, and bronze.
  4. Reproducibility: Metal parts produced by sand casting can be reproduced with high precision, which is important for applications where high dimensional uniformity and part quality are required.
  5. Customization: Sand casting allows customization of metal parts to meet specific customer needs, such as the addition of holes, special features, and surface textures.

In general, sand casting is a versatile and inexpensive manufacturing process that offers a wide range of advantages for the production of high-quality, precision metal parts.