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vacuum forming 1/24, 1/25 cracked windshields

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  • Member since
    February, 2005
  • From: South Carolina
vacuum forming 1/24, 1/25 cracked windshields
Posted by sturner on Monday, September 30, 2013 12:40 PM

Is it possible to vacuum form a cracked or damaged windshield. I have contacted Revell and the no longer supply the windshield if the kit is two years or older. I'm thinking about getting a vacuum forming machine from micro-mark and using the damaged windshield as the mold to form a new one

kits that I need to replace the windshields

Revell 2171 Dale Earnhardt Wrangler Monte Carlo SS

Monogram 2785 Corvette ZR-1

Any tips would be much appreciated....

S.Turner

Out of the Box Scale Shop...

  • Member since
    January, 2005
  • From: Cape Coral Florida
Posted by BigTallDad on Monday, September 30, 2013 1:29 PM

You can make your own vacu form device:

http://cs.scaleautomag.com/sca/general_discussion/f/3/t/77171.aspx

Use Air-dry clay (available at Michaels) to create the mold:

http://cs.scaleautomag.com/sca/general_discussion/f/3/t/111327.aspx

"In order to teach a dog, you must first be smarter than the dog" P.R. Ferguson

  • Member since
    February, 2005
  • From: South Carolina
Posted by sturner on Tuesday, October 01, 2013 6:06 AM

Thank you for the tip, I will look into this option.

S.Turner

Out of the Box Scale Shop...

  • Member since
    February, 2005
  • From: South Carolina
Posted by sturner on Wednesday, October 02, 2013 5:24 AM

Damaged windshield, you can see where the windshield was cracked and broken and behind the top window section was broken.

http://imageshack.us/g/1/10338767/

S.Turner

Out of the Box Scale Shop...

  • Member since
    August, 2005
Posted by sjordan on Monday, October 07, 2013 11:11 AM

Evidently this thread has been duplicated or moved. Here's what I posted in the first thread:

If all else fails, here's another technique, used by aircraft modelers to duplicate clear canopies, that can work with thin, clear sheet styrene (the product being demonstrated is no longer available). I suggest using a heat gun instead of a candle. You have to glue your windshield together, fill the crack and sand until smooth, to use as a buck. As recommended above, use clay as a backing support to hold the part steady.

[img=i827.photobucket.com/.../Picture2-2_zps732a82e4.png]

[img=i827.photobucket.com/.../Picture3_zps566e28cb.png]

  • Member since
    August, 2005
Posted by sjordan on Monday, October 07, 2013 11:11 AM

Evidently this thread has been duplicated or moved. Here's what I posted in the first thread:

If all else fails, here's another technique, used by aircraft modelers to duplicate clear canopies, that can work with thin, clear sheet styrene (the product being demonstrated is no longer available). I suggest using a heat gun instead of a candle. You have to glue your windshield together, fill the crack and sand until smooth, to use as a buck. As recommended above, use clay as a backing support to hold the part steady.

[img=i827.photobucket.com/.../Picture2-2_zps732a82e4.png]

[img=i827.photobucket.com/.../Picture3_zps566e28cb.png]

  • Member since
    January, 2005
  • From: Cape Coral Florida
Posted by BigTallDad on Monday, October 07, 2013 2:43 PM

sjordan

Evidently this thread has been duplicated or moved. Here's what I posted in the first thread:

I think you accidentally posted your reply in the Poor Man's Vacu Form tutorial instead of here.

"In order to teach a dog, you must first be smarter than the dog" P.R. Ferguson

  • Member since
    February, 2005
  • From: South Carolina
Posted by sturner on Monday, October 07, 2013 3:49 PM

Thanks

S.Turner

Out of the Box Scale Shop...

  • Member since
    February, 2005
  • From: South Carolina
Posted by sturner on Monday, October 07, 2013 3:55 PM

I have a vacuum forming machine I think I will need to support the windshield inside with modeling clay so the original windshield will not be sucked flat and damaged beyond repair.....

S.Turner

Out of the Box Scale Shop...

  • Member since
    January, 2005
  • From: Cape Coral Florida
Posted by BigTallDad on Tuesday, October 08, 2013 10:07 PM

sturner

I have a vacuum forming machine I think I will need to support the windshield inside with modeling clay so the original windshield will not be sucked flat and damaged beyond repair.....

 
Several things come to mind...

If you support the original windshield with modeling clay, the resulting part will be too big based on the thickness of the cracked windshield you're using

Depending on how you heat the plastic for the "new" windshield, you might have a really sticky mess if the modeling clay melts a little (or a lot) and the buck could be seriously deformed, ruining future efforts.

 
I think I'd still go with the air-dry clay mentioned in a posting above, but that's your call

"In order to teach a dog, you must first be smarter than the dog" P.R. Ferguson

  • Member since
    February, 2005
  • From: South Carolina
Posted by sturner on Wednesday, October 09, 2013 9:24 AM

This is the vacuum forming machine I have.....not sure about the specs, the top cover is the heating element when the plastic dips 3/4" you push the heating element to one side turn heat off and lower the plate down on top of the part duplicating and turn on vacuum. wait to cool.... Its only a 5" x 5" sheet of plastic (.030) thick from K&S. The original monogram windshield is about (.027) thick

imageshack.us/.../10340095

S.Turner

Out of the Box Scale Shop...

  • Member since
    January, 2005
  • From: Cape Coral Florida
Posted by BigTallDad on Thursday, October 31, 2013 6:30 PM

Have you made any progress? If you're having difficulties, PM me

"In order to teach a dog, you must first be smarter than the dog" P.R. Ferguson

  • Member since
    February, 2005
  • From: South Carolina
Posted by sturner on Friday, November 01, 2013 12:41 AM

Yes, formed the the non drying clay under or inside the windshield to support it and it worked just have to trim the access....

S.Turner

Out of the Box Scale Shop...

  • Member since
    August, 2013
  • From: West Seneca, NY (Buffalo)
Posted by Snork56 on Friday, November 01, 2013 6:59 AM

Have you tried in the forum here to put out an appeal to fellow builders for these windshields that you are trying to replicate??  Someone may have the items that you are looking for..

To get back up when you are down, fight when you are struggling, give the extra effort when you are in pain, come back when no one expects you to and stand up tall when people try to pull you down.    That is what makes up a true champion!!   Snork56 (S56) Henry D.  

  • Member since
    August, 2010
  • From: Ct.
Posted by cadillac on Sunday, April 29, 2018 5:09 PM

I have a 9"X9"  Vacuum Former, but I don't know what Thickness I should use for 1/24-1/25 Scale.

I plan on using the Damaged Windshield/Window(s) as the Forms(?). I'll Shore and Prop them up with (I dunno) Golf Tees or something so they're not laying on the Former. Carving Wood Bucks is beyond my skill set and patience.

If it works for my JoHan '64 Petty Plymouth Belevdere

I'm a bad monkey.

Aaaaaaaahhhhh insanity, It's not just for the insane anymore.

  • Member since
    August, 2016
Posted by mini man on Sunday, April 29, 2018 5:54 PM

Use bondo as a buck for the windshield,about 1/4 inch thick.

 

Nigel.

 

  • Member since
    May, 2015
Posted by Goofy62 on Saturday, May 05, 2018 10:52 AM

Uuuh, the windshields you mention don't sound all that complex.

As long as the glass you're reproducung doesn't have any compound curves in it, all of this vacuuforming stuff is a complete waste of time.

You can replicate a good number of windshields with simple thin clear plastic sheet just glued into place.

I use .007 clear "lay film".

That's how the front and rear glass on this '67 Bonneville was recreated.

 

Steve

 

 

 

  • Member since
    October, 2008
Posted by oldcarguy on Thursday, May 31, 2018 3:36 PM

Hmmm;

 I second Goofy 62 here . I don't even worry about Vac-Formed windshields unless they are 60 or 61 Ford , Mercury or Chrysler products .

 They are slightly bubbled toward the top !

gjgeracci

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