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Extrusion is a process which uses a shaped die in order to get a material with a constant cross-sectional cut. The Extruder uses force to push the material through the die in order to get a desired shape. Each product has a uniquely designed die through which the material moves thereby creating the desired shape and characteristics. This process allows for more intricate designs and shapes through specific extruding processes such as:

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• Direct Extrusion: also known as forward extrusion, this extrusion process is one of the most popular in the industry because the blank is easily pushed through the desired shape

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• Indirect Extrusion: also known as backward extrusion, the Extruder moves the die cut and container over the blank that remains in place

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• Impact Extrusion: uses cold metal billets which are extruded under high pressure. A lubricated metal slug is placed inside a die cavity and struck once through a punch. This causes the material to flow back around the punch, through an opening between the die and the punch

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• Hydrostatic Extrusion: a form of direct extrusion where the billet is held in a sealed chamber surrounded by pressurized liquid. The force delivered through the ram pressurizes the liquid, which in turn applies pressure to all surfaces of the billet. The force from the incompressible fluid then pushes the billet through the die

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• Hot Extrusion: the extrusion process is done at temperatures much higher than the recrystallization temperature of the material being extruded

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• Cold Extrusion: is performed at room temperature or slightly above room temperature

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• Hard Alloy Extrusion: various alloys contain a higher density which requires the use of higher pressure to force the material through the die to create the desired shape

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• Soft Alloy Extrusion: some alloys are not as compact so these fragile alloys do not require great amounts of pressure to move through the die cut and be shaped

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• Drawn Tube: for precise measurements and high quality, this extrusion process shapes a large tube into a more compact, smaller tube by forcing it through a mold

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• Drawn Wire: similar to that of tube drawing, this process of extrusion pulls wire through a die to shrink it

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• Drawn Rod: for this extrusion, a tube goes through the same process as other forms of drawing but a mandrel is added inside the tube for additional shaping of the interior

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• Cold Headed Wire: another drawing process, this form of extrusion draws metals through the die cut

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• Cold Rolling: in this extrusion process, rather than the Extruder using a die cut, a metal is passed through two rolls to decrease thickness near room temperature

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• Hot Rolling: similar to cold rolling, this extrusion process also passes a metal through two rolls but at a higher temperature

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• Remelting: after various metals have undergone the types of extrusion, scrap metal is usually the byproduct. By melting these metals back down, they can be reused and recycled again for future shaping

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Extrusion is the process of shaping metals into precise and quality forms which are made to last for any job. Depending on the job and end usage for the metal work, it could require any of the variety of extrusion processes listed above.
 

Get the qualified candidate you need to perform any type of extrusion job with the help of the Extrusion Industry Recruiters at Laminin Corp. Get started today!