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What Is the Difference Between Cast Aluminum and Die-Cast Aluminum?

Nov. 09, 2020

Aluminum Casting FoundryMany everyday items are aluminum Casting Foundry.

Casting metal refers to forming by melting and then pouring it into a mold. When the metal cools and solidifies, it adopts the shape of the mold surrounding it, and once it is completely cooled, it can be withdrawn. When they want to make cast aluminum products, manufacturers can choose several methods. One of them is called die casting.


Conversion is a broad term that describes various methods. Die casting is just one of them, although as far as aluminum is concerned, die casting is one of the three most popular. Two other important methods are called permanent molds and sand casting. Die casting can provide very high accuracy and a very consistent shape, while sand casting is more versatile and is better for objects with complex patterns and designs.

Die Casting

In die casting, the manufacturer first melts the aluminum and then presses it into a steel mold under high pressure. The mold is called a mold and is made of alloy tool steel, divided into two or more parts. One of these parts is called the cap half and remains fixed; on the contrary, once the aluminum solidifies, the ejector half is removed, and the final product is discharged at this time. The steel mold quickly conducts heat away from the aluminum, so the cooling process is very rapid.

Sand and permanent mold

Sand Casting Tooling Design uses molds made of sand and clay to confine aluminum while cooling. Sand is a poor conductor of heat, so the cooling process is very slow. The mold is consumable. In contrast, in permanent mold casting, the mold is made of steel or some other metal and can be reused. The main difference from die casting is that although vacuum is sometimes applied, the metal is only poured into the mold instead of injected.


Each technology has its advantages. Die casting can be automated and is therefore more suitable for mass production, although the initial cost of the equipment is usually higher. For smaller volumes and larger or more complex products, sand casting is more economical. Permanent molds can provide stronger and more durable finished products. Many aluminum objects (such as car parts or cookware) are made through one of these processes.

Our company provides various aluminum casting products, if you are interested in our products, please feel free to contact us.

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