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Old 03-27-2008, 10:23 PM   #1 (permalink)
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Vacuum forming--may be useful for boat tails, etc..



What do you think?

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Old 03-27-2008, 11:26 PM   #2 (permalink)
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Very cool. I wonder what kind of plastic he used... too lazy... to .. go .. check.. web.. site...
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Old 03-27-2008, 11:30 PM   #3 (permalink)
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i think thats great, it would work wonderfully for aero light lenses/covers if you used clear plastic. thanks for the video, verry informative, only question i had was what temp do you set the oven to?
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Old 03-28-2008, 02:53 AM   #4 (permalink)
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A friend who teaches industrial design at the local university is attempting to find a misplaced book for me on making parts for stage sets made with a "$100 vacuum former" using peg board, a shop vac, and some heat lamps I suspect, ABS plastic, and Lexan are two that I have been told will work, lexan is clear and is often used in place of glass for windows, if you get it thick enough (half inch I think) then it's practically bullet proof!
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Old 03-28-2008, 03:00 AM   #5 (permalink)
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Quote:
Originally Posted by Ryland View Post
A friend who teaches industrial design at the local university is attempting to find a misplaced book for me on making parts for stage sets made with a "$100 vacuum former" using peg board, a shop vac, and some heat lamps I suspect, ABS plastic, and Lexan are two that I have been told will work, lexan is clear and is often used in place of glass for windows, if you get it thick enough (half inch I think) then it's practically bullet proof!
PETG (soda bottle plastic) also works It's cheaper than lexan and has a lower sag temp

I've heard delrin can also be vacuum formed - but IIRC it's basically nylon and I don't think it's clear... But, it's much better at resistance to cracking like lexan (PETG being a little better than lexan).

We had to do this research last year for the HPV build (just passing that info along )
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Old 03-28-2008, 03:01 PM   #6 (permalink)
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go vacuum forming!

Many years ago,I got a tour of a local manufacturer of marine plastic parts.Electric "pizza" ovens were used to heat ABS sheeting until it drooped,then the material was quick-clamped over a wooden form,to a vacuum table,which was connected to an accumulator,in turn connected to a large vacuum pump.A foot-operated valve enabled vacuum to be transferred,parts were made in less than a minute,then sent to a trim -fixture,where a router cut away "flash",rendering the finished part.I've seen ABS ponds at HOME DEPOT larger than the front of a car,which can be purchased for $150.00,U.S..My thought was,that a complete streamlined automotive front end could easily be produced for $150.00.I still do! Conversely,a boattail could certainly be produced in the same way.And anything else for that matter.And that's "RETAIL" pricing,complete with middlemen,and profits!
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Old 03-28-2008, 03:37 PM   #7 (permalink)
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Google's use of keywords creates some interesting ads that really class the place up...



I doubt a true boat tail could be made with enough structural integrity, unless specific supports were molded in place. It would be useful for small scale parts though (i.e. tire boattails).

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Old 03-28-2008, 06:33 PM   #8 (permalink)
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Quote:
Originally Posted by LostCause View Post
Google's use of keywords creates some interesting ads that really class the place up...



- LostCause
Someone at Google has seen one of our penis shaped cars apparently.

Anyone know the .Cd of a penis in a windtunnel ?

O.K. ............ back on topic !!!

What is the largest size that can be formed on one the home kits ?
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Old 03-28-2008, 11:08 PM   #9 (permalink)
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i would think it would be limited to the amount of area that you can heat and also the strength of the pump... just a thought, there might be more that goes into it but that seems like the biggest limiting factors
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Old 03-29-2008, 12:10 AM   #10 (permalink)
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I've seen this used with model planes, but nothing larger than around 12".
The only thing that would worry me would be the fumes .

Interesting process though. Looks easy too !

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