How is the Exterior of the New Mac Pro Made? Impact Extrusion
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Man I can’t get over that new Mac Pro. And while we all know the “thermal core” part is made from extruded aluminum, how is the exterior (which is also aluminum) made? It’s obviously not extruded, as it’s got that inward-curving lip up top, and it wouldn’t make sense from an efficiency standpoint to CNC-mill the entire thing out of a billet; there would be too much waste. Any guesses?
According to Don Lehman, it’s made using the production method known as impact extrusion. Conceptually, the process is more similar to blowmolding than proper extrusion, except a metal punch takes the place of compressed air, and the material used is metal rather than plastic. Here’s a quick look at impact extrusion as performed by Illinois-based Best Metal Extrusions, on a product significantly smaller than the Mac Pro. (Looks like a cigar holder, but your guess is as good as mine.)
Here’s something a little closer in size to the Mac Pro:
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