Aluminum Extrusion

Aluminum Extrusion

Cosmopolis

The first process of aluminum extrusion is melting and casting, which goes through the steps of dosing, melting and casting to finally make the "round casting bar", the common raw material for aluminum extrusion.

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What Is Aluminum Extrusion?

Aluminum extrusion involves heating and pushing aluminum alloy through a die to form specific cross-sectional shapes. The die's opening can be adjusted to create various shapes and sizes to meet product specifications.
Direct Aluminum Extrusion

This is the most commonly used extrusion aluminum technique. The aluminum extruder places the billet/heated aluminum in a container with heated walls while a moving ram pushes the metal through the die opening with force. This step produces a high amount of pressure.

Indirect or backward extrusion is entirely different from the direct technique. In this process, the heated aluminum and the container move concurrently while the die remains in the same position. Machinists often use a “stem” to perform this operation. The length of the stem must be longer than the container’s length. Hence, the stem forces the aluminum billet through the stationary die.

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Anodizing

Anodizing is a process that helps strengthen the aluminum’s naturally-existing oxide layer. It does this by improving its corrosion resistance properties. Also, anodizing aluminum makes the metal more resistant to wear, strengthening the surface emissivity and creating a porous surface that can accept various colored dyes.

Painting

Manufacturers often paint extrusions for aesthetic reasons. However, it also helps to increase its longevity and reduce the cost of maintenance. You can also apply different colors to extruded aluminum profiles, providing a buffer against corrosion.

Blasting

Blasting helps to eliminate residue and scale present on a machined component after heat treatments. This procedure helps to add texture to the surface while removing other contaminates that may remain after heat treatment. Blasting helps to make further operations, such as machining and painting, easier, giving your extruded aluminum profiles an aesthetic matte finish.

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