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Vacu forming large canopy HELP!!

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Old 08-26-2002, 09:43 AM
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Closterman
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Default Vacu forming large canopy HELP!!

I try to make a canopy for my 80" Cap 10.
( http://www.mraerodesign.com/cap10/CAP10.HTML )
The canopy is pretty big (10"W x 18"L x 6"H). I have make a vacum box 2" larger than the canopy. When I have put to warm PET-G palstic (.020/ thick and heated at 300 deg on my kitchen stove) I have only make the 3/4 of the heigth and all jammed there. Not enough to be able to take the vacum box edge and suck the plastic.. The plastic is cooling too fast I think! I have tried to put the plastic more long time in the stove but without succes. Someone have a tips??
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Old 08-26-2002, 11:03 AM
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Default Vacu forming large canopy HELP!!

Put the plastic in the frame and onto the form. (COLD)

get a heat gun, and heat as you form.

You can probably get one of the partial forms you've done to finish forming...

Professional vacuum form rigs have heating elments above the vacuum box, to keep the plastic hot while it is pulled over the shape.
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Old 08-26-2002, 07:07 PM
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rcalfred
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Default vacuum forming

Have you tried using thicker plastic? Have heard that the thicker gauge will hold heat better that the thin and thus will be better able to fully form. .020 seems pretty thin for the size canopy you are trying to pull. Regards.
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Old 08-26-2002, 07:34 PM
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Default Vacu forming large canopy HELP!!

RCALFRED, I think you are right. Thicker plastic will have probably more heat inertia, or something like that. I have noticed that my plastic are to thin to this canopy size. I have ordered another sheet to make some test. Cross your finger
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Old 08-30-2002, 07:36 AM
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LesUyeda
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Default Vacu forming large canopy HELP!!

Closterman: Micro Mark has a great book on vacuum forming. About 15.00 USD, and worth twice as much.

Les
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Old 07-24-2010, 09:59 PM
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Default RE: Vacu forming large canopy HELP!!

Use .040 PETG at about 320 degree oven
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Old 07-24-2010, 10:38 PM
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Default RE: Vacu forming large canopy HELP!!

LOL, very timely
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Old 07-24-2010, 11:17 PM
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Old 08-21-2010, 01:28 AM
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Default RE: Vacu forming large canopy HELP!!

Better late than never
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