In recent years, aluminum extrusion has become an increasingly popular method for both the development of new products and their production. According to Technavio's projections, the demand for aluminum extrusion around the world will increase at a rate of approximately 4% between the years 2019 and 2023.



It's possible that you've heard of this manufacturing process and are interested in learning more about what it is and how it operates. This article will delve into the details of everything you need to know about extrusion aluminum, starting with the basics and working our way up to more advanced topics.


Extrusion of aluminum: What Is It?


aluminum extrusions

  • The process of forcing aluminum alloy material through an extrusion die, which has a specific cross-sectional shape, is known as aluminum extrusion

  • The aluminum is pushed through the die by a substantial ram, and it emerges from the aperture in the die

  • When this occurs, aluminium manufacturer takes on the exact shape of the die and is moved along a runout table in preparation for the next round

On a fundamental level, the process can be understood as a straightforward method that is being followed. The amount of force that is applied is analogous to that which is required when manually squeezing a tube of toothpaste. If you squeeze the tube, the toothpaste will come out in the same shape as the opening in the tube. The opening at the top of the tube of toothpaste essentially serves the same function as an extrusion die.

Aluminum Extrusion History

The earliest beginnings of this manufacturing process can be traced back more than a century. Joseph Bramah was the first person to develop the extrusion procedure in 1797, and he did so in order to produce lead pipes. Squirting was the name given to the process when it was first developed, and it was a manual operation up until 1820, when Thomas Burr completed production of the first hydraulic press. In the year 1894, Alexander Dick developed the hot extrusion process, which is still utilized in today's manufacturing. The use of non-ferrous alloys in the extrusion process has become commonplace in recent years as a result of the development of a method known as hot extrusion. After the first aluminum extrusion press was built in 1904, there was a significant increase in the number of applications for aluminum in the automobile and construction industries.

During the time of the world war, there was a significant rise in the demand for aluminum that had been extruded. It was put to use in a variety of military applications as well as in the manufacturing of airplanes. The demand for aluminum that had been extruded increased in scope. It is now a regular occurrence in our lives. This efficient production method is responsible for the creation of all of the goods in your life, from the vehicle you drive to the things in your home.

The Extrusion Process of Aluminum, Both Direct and Indirect

Direct and indirect processes are the two most common kinds of procedures that are utilized for aluminum extrusions. In the direct method, the die head remains immobile throughout the process, which is carried out by a ram that moves back and forth behind the die. When it comes to the indirect extrusion process, on the other hand, the billet does not move at any point. After that, the die assembly will move in opposition to the billet in order to generate the pressure necessary to push the metal through the die. Both of these procedures are broken down in further detail below.

Direct Aluminum Extrusion Process direct extrusion process

The most typical approach to the process of extruding aluminum is known as direct extrusion. The heated billet of aluminum is placed in a container with heated walls by an extruder that works with aluminum. The metal is then pushed through the die with the help of a moving ram. At this stage, there is a significant increase in the amount of pressure that is generated.

In addition, machinists frequently position blocks of various materials in the space between the billet and the ram. By following these steps, the ram and the heated billet will not come into contact with one another. Due to the fact that both the aluminum billet and the ram move in the same forward direction, some people also refer to this method as a forward extrusion process.

Process of Indirect Extrusion of Aluminum process of indirect aluminium extrusions


The direct process is not the same as the indirect process, which is also sometimes referred to as backward extrusion. In this situation, the die is held in place while both the billet and the container move at the same time. In order to carry out this process, manufacturers make use of a "stem."This stem needs to be longer than the length of the container, and it serves the purpose of retaining the ram in its position. As a result, the aluminum billet is driven under pressure through the stationary die.

This method, as opposed to the direct method, generates less friction, which results in better control of heat. In most cases, the product quality of indirect extrusions is more consistent than direct ones. It's possible that this is because the force that was applied stayed relatively the same. Maintaining a consistent temperature not only ensures better grain structure but also better mechanical properties.