The Process of Aluminum Extrusion
The process of aluminum extrusion consists of the following steps:
▶ When finishing designing and creating the shape of the die, a cylindrical billet of aluminum alloy is heated to 800°F-925°F.
▶ Then put the aluminum billet to a loader, where a lubricant is added to prevent it from sticking to the extrusion machine, the ram or the handle.
▶ Using a ram to apply the substantial pressure to a dummy block , which pushes the aluminum billet into the container, forcing it through the die.
▶ In order to avoid the formation of oxides, nitrogen in liquid or gaseous form is used and allowed to flow through the sections of the die. This makes an inert atmosphere and increases the life of the die.
▶ The extruded part comes into a run-out table as an elongated piece that is now the same shape as the die opening. It is then pulled to the cooling table where fans cool the newly created aluminum extrusion.
▶ After the cooling finished, the extruded aluminum is moved to a stretcher, for tightening and work hardening.
▶ The hardened extrusions are brought to the saw table and cut according to the required lengths.
▶ The final step is to treat the extrusions with heat in age ovens, which hardens the aluminum by speeding the aging process.
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