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Old 09-21-2021, 05:38 PM   #1
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3d printed parts are mostly printed with PLA (which is cornstarch basically). Some will print with ABS but it's a pain to get printed well. I dont see 3D printing ever taking over injection molding cause you can tell a part that is 3d printed just by looking at it. Great for some things but car plastics....not a chance.
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Old 09-21-2021, 09:05 PM   #2
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Originally Posted by Stl-986 View Post
3d printed parts are mostly printed with PLA (which is cornstarch basically). Some will print with ABS but it's a pain to get printed well. I dont see 3D printing ever taking over injection molding cause you can tell a part that is 3d printed just by looking at it. Great for some things but car plastics....not a chance.
Not entirely true - even on automotive application.

My son designed and printed the parts (bottom, top and the attaching screw) holding the two lines under my Boxster almost two years ago and those do look like new still.
Only part on this set up I got from Porsche was the rubber liner around the pipes.

These 3D parts have not bent, flexed or deformed on driving here in Finland - including approximately 11 trackdays.
Car has been driven approximately 18.000km after the parts was instelled.

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Old 09-23-2021, 09:38 AM   #3
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Originally Posted by Stl-986 View Post
3d printed parts are mostly printed with PLA (which is cornstarch basically). Some will print with ABS but it's a pain to get printed well. I dont see 3D printing ever taking over injection molding cause you can tell a part that is 3d printed just by looking at it. Great for some things but car plastics....not a chance.
Very untrue. I've seen plastic 3D printed prototype parts where the only way you'd be able to tell is not being able to find the gate locations. The Mini GP (very low production car, but production) uses 3d printed metal components - shift paddles and a couple other parts I can't remember.

There's all kinds of additive manufacturing techniques beyond the homemade setup your friend has in their basement.

Of course, machine and materials costs go up exponentially with material / quality / strength / appearance requirements. But, as an emerging tech with a LOT of benefits, we should see rapid progress which leads to improved techniques and better costs.
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