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  #1  
Old 08-24-2021, 06:43 PM
SabreFlyr SabreFlyr is offline
 
Join Date: Sep 2015
Location: Marion, IN
Posts: 289
Default Straightening curved fresh air vents

After trimming the forward 3/4" of one of my fresh air vents per page 29-21, I still have a substantial curve that takes significant force to flatten. I'm concerned that, even with a good adhesive, it might still pry itself free at the forward end. I'm considering clamping it to the top of my workbench while using a hot air gun (Steinel; capable of somewhere north of 800°F) to soften the plastic. Any reason not to try this? Secondly, how much heat should I consider?
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  #2  
Old 08-24-2021, 07:41 PM
VA Maule VA Maule is offline
 
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Gently warm it with a heat gun a little at a time until it's plastic (verb) enough to take a new set . Let it cool against flat surface , in a few minutes it aught to be good to go.
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  #3  
Old 08-24-2021, 08:06 PM
Taltruda Taltruda is offline
 
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800 degrees is too much. Harbor freight sells a cheap heat gun, but you might have luck with a blow drier too
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  #4  
Old 08-25-2021, 04:58 AM
SabreFlyr SabreFlyr is offline
 
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Location: Marion, IN
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Quote:
Originally Posted by Taltruda View Post
800 degrees is too much. Harbor freight sells a cheap heat gun, but you might have luck with a blow drier too
I should have added that it is fully adjustable. I'll definitely start on the lower end of its range.
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  #5  
Old 08-25-2021, 04:00 PM
abwaldal@gmail.com abwaldal@gmail.com is offline
 
Join Date: Jan 2017
Location: Battle Ground WA
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You have probably seen 2 and 3" conduit used in electrical work. We use a brush burner torch and heat that big thick stuff slowly and when it is in a plastic state just bend it to where we want. 90 degrees, around corners, you name it it goes.
Plastic is very malleable if you take care
Heat away. Art
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  #6  
Old 08-25-2021, 05:24 PM
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emsvitil emsvitil is offline
 
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Would hot (boiling?) water pot do the trick?
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