How is a hollow aluminium extrusion produced ?

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How is a hollow aluminium extrusion produced ?

Hi, can anyone help? I know how a soild aluminium extrusion is made(Using high hydraulic pressure and a die) but how is a hole produced in the extrusion over a long length with an accurate size? I would have thought this is difficult to describe so please if possible could you include links to pictures to help me understand a bit more.

2007-07-10 21:39:17 · 2 answers · asked by -AlchoL- 1 in Science & Mathematics ➔ Engineering

2 answers

The same extrusion press but using a die and a mandrel. The mandrel defines the ID of the hollow.

Look in any good book on manufacturing technology and you will get enough illustrations etc.

2007-07-10 21:50:02 · answer #1 · answered by Swamy 7 · 1⤊ 0⤋

the sheet aluminium is folded together and the seam is sealed with a seam welder as it is made

2007-07-12 10:32:57 · answer #2 · answered by Anonymous · 1⤊ 0⤋