How Are Aluminum Castings Made?

 

Lightweight, durable, and corrosion-resistant aluminum castings are found practically everywhere—in most of the devices and infrastructure elements surrounding us. Thanks to its unique properties, aluminum is used to manufacture various components for many industries, from automotive and electronics to household appliances, construction, food processing, tooling, chemical, aerospace, and advanced space technologies.

Aluminum is a metal with excellent thermal and electrical conductivity, high plasticity, and resistance to discoloration.

Modern aluminum castings are characterized by high precision, faithful reproduction of details, and the ability to achieve even highly complex shapes. Another undeniable advantage is their relatively low cost and recyclability.

 

 

 

 

How Are Aluminum Castings Made?

 Producing high-quality castings requires a series of technological steps, including:

  •  Developing the design and technical documentation
  •  Preparing the mold, which is filled with molten metal
  •  Cooling the casting
  •  Cleaning and finishing processes
  •  A final quality inspection using specialized equipment (e.g., 3D scanners)
  •  Packaging the finished product

The base material for aluminum castings consists of so-called ingots—uniform aluminum bars that serve as semi-finished products melted in a foundry furnace. The molten material undergoes refining to remove impurities and gases. The prepared aluminum is then transferred to a holding furnace, which maintains the metal in a liquid state.

Next, the liquid aluminum is injected into pre-made molds under the correct pressure, where it cools and takes the desired casting shape. This technology, known as pressure die casting, produces extremely high-quality castings used in industries such as consumer electronics, medical equipment, defense, and automotive.

For components requiring lower precision and intended for further mechanical processing (e.g., machining), sand casting is often used. In this method, the casting mold is made from a sand-based molding mixture placed in a dedicated mold box, where the final component’s model is "imprinted."

A sand mold can only be used once, but it can be recycled. The advantages of sand casting include fast order fulfillment and the ability to produce large and heavy components, such as pistons, valves, engine blocks, pulleys, bearings, housings, and other structural elements.

 

Custom Aluminum Castings

 

Odlewnia Metali Kolorowych Kowala is a modern foundry specializing in small- and large-series production of aluminum castings for customers from various industries. With an advanced machine park and an experienced team, we are capable of producing even the most technically complex castings.

We offer high-quality castings from different aluminum alloys, depending on the required specifications and final product parameters.

Orders are fulfilled according to the provided technical documentation. Our castings are produced using modern pressure die casting or sand casting methods. Additionally, they can undergo a wide range of finishing processes, including:

  • Sandblasting
  • Shot blasting
  • Vibratory finishing
  • CNC machining
  • Powder coating
  • Anodizing

Once they leave our foundry, the castings are ready for assembly and further application.