Go Back   EcoModder Forum > EcoModding > DIY / How-to
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-09-2009, 12:51 PM   #1 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 527 Times in 354 Posts
DIY Vacuum Forming

Hello -

Christ mentioned a vacuum forming instructable in this thread :

http://ecomodder.com/forum/showthrea...disk-3657.html

I think it is also relevant to this thread :

http://ecomodder.com/forum/showthrea...iscs-7381.html

I Googled and found this :

Vacuum Forming with your Kitchen Oven and Vacuum Cleaner


Here's the dude's website :
Vacuum Former Plans

For smooth racing disks, I am *guessing* that you don't even need the vacuum part, because the wheel cover shape is so uniform and simple. I think the only question is figuring out how thick you want the wheel cover to be.

But, for other things (like a side view mirror delete cover), the vacuum would become a must.

Question: Would I have to worry about "outgassing" (not exactly the right word) as the plastic heats up?

In any case, lotta possibilities here,

CarloSW2

__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society

Last edited by cfg83; 03-09-2009 at 12:59 PM..
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-09-2009, 01:18 PM   #2 (permalink)
NightKnight
 
NachtRitter's Avatar
 
Join Date: Dec 2008
Location: Placerville, CA
Posts: 1,594

RippinRoo - '05 Subaru Legacy Wagon 2.5 GT
Subaru
90 day: 21.16 mpg (US)

Helga - '00 Volkswagen Jetta TDI
TEAM VW AUDI Group
Diesel
90 day: 53.91 mpg (US)

Olga - '03 Volkswagen Jetta Wagon
90 day: 46.24 mpg (US)
Thanks: 303
Thanked 310 Times in 186 Posts
Ya, I'm not sure you'd want to cook your dinner in the same oven you just got through cooking plastic in...

I could be wrong tho...
  Reply With Quote
Old 03-09-2009, 03:03 PM   #3 (permalink)
Misanthropologist
 
captainslug's Avatar
 
Join Date: Sep 2008
Location: Sterling, VA
Posts: 383

BORK! - '89 Volvo 240 DL Wagon
90 day: 21.27 mpg (US)
Thanks: 2
Thanked 24 Times in 13 Posts
You do need a vacuum, or you won't be able to get the warmed sheet to conform to the mold. You'll end up molding all of the air pockets.

Building the vacuum table itself is really easy, especially if you don't need rail guides or anything. You can make one out of 2x4s, pegboard, drywall screws, and caulking compound.
Quote:
Originally Posted by cfg83 View Post
Question: Would I have to worry about "outgassing" (not exactly the right word) as the plastic heats up?
If you're doing it right, you won't be heating the plastic enough for it to be combusting or producing fumes. You're heating it to the level of thermoforming, the same temperatures that the manufacturer uses to injection, blow, or vacuum mold it to the desired shape.
  Reply With Quote
Old 03-09-2009, 03:04 PM   #4 (permalink)
Harebrained Idea Skeptic
 
Join Date: Jun 2008
Location: Alpharetta, GA
Posts: 211

The White Car - '84 Mercedes-Benz 300td
90 day: 28.84 mpg (US)

The Blue Car - '86 BMW 535i
Last 3: 23.86 mpg (US)
Thanks: 17
Thanked 13 Times in 9 Posts
Quote:
Originally Posted by cfg83 View Post
Question: Would I have to worry about "outgassing" (not exactly the right word) as the plastic heats up?
Not if you have the proper temperature for molding. You also want it to be uniform.
__________________

  Reply With Quote
Old 03-09-2009, 05:17 PM   #5 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 527 Times in 354 Posts
Hello -

Thanks for the advice. Since the operative word phrase "if you're doing it right" is in play, I don't think I will try it with our oven. I need room to make mistakes. I would need to find another way to achieve the same thing.

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 03-09-2009, 11:29 PM   #6 (permalink)
Almost fuel free!
 
Join Date: Nov 2008
Location: Georgia
Posts: 24
Thanks: 0
Thanked 2 Times in 2 Posts
You may want to try using a heat gun from a hobby or craft store. If I remember correctly, they are fairly cheap, and can produce temperatures near 400 degrees F, which is more than enough to shape acrylic in a vacuum former.
  Reply With Quote
Old 03-10-2009, 01:46 AM   #7 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 527 Times in 354 Posts
eco86 -

Quote:
Originally Posted by eco86 View Post
You may want to try using a heat gun from a hobby or craft store. If I remember correctly, they are fairly cheap, and can produce temperatures near 400 degrees F, which is more than enough to shape acrylic in a vacuum former.
Stop reading my mind, ! I have a heat gun from Harbor Freight in the garage. I could place the plastic over the pizza pan (that has a grid of little holes) and "heat" from below. Let the plastic sag over the mold.

Works great in my mind, but reality will tell ...

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 03-10-2009, 02:38 AM   #8 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 527 Times in 354 Posts
Hello -

I have since learned that sign shops use "thermoplastic" to do their vacuum forming. Mayyyyybeeeeee I'll go to a sign shop and get a quote on how much it would cost to do four pizza pan wheel covers!

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 03-11-2009, 04:12 PM   #9 (permalink)
Almost fuel free!
 
Join Date: Nov 2008
Location: Georgia
Posts: 24
Thanks: 0
Thanked 2 Times in 2 Posts
Thermoplastic is really any plastic that can be formed through heat. Some of the popular ones are styrene (solid, not like the foam), acrylic, lexan and ABS. I wouldn't recommend styrene, mainly because it cracks easily and I'm not sure how it would hold up to being mounted on a wheel. Acrylic is slightly better, but ABS would probably work the best.
I recommend checking out McMaster-Carr for materials, but only if you live near where their distribution centers are, since the shipping is usually the most expensive part of the bill if you're buying anything larger than a couple square feet.
  Reply With Quote
Old 03-11-2009, 04:48 PM   #10 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 527 Times in 354 Posts
eco86 -

Thanks for the clarification. I am repeating what I was told, so the detailed definition helps.

CarloSW2

__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY: OEM VX PCV and Info TomO DIY / How-to 4 04-02-2011 09:38 AM
10-minute Accord vacuum gauge "install" Clev DIY / How-to 7 09-10-2010 03:53 AM
Woo Vacuum Pump! trebuchet03 The Lounge 10 05-14-2010 12:52 PM
Tach & Vacuum Gauge Installed midnight rumbler Success Stories 8 01-01-2009 01:33 PM
no vacuum for vacuum gauge? modmonster Instrumentation 2 11-07-2008 07:40 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com