jacko
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| posted on 14/9/13 at 06:49 PM |
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bending lexan 4mm sheets
Hi has anyone bent lexan sheet it will need to be bent with a 3ins radius the sheet will be 30ins wide
If you have how did you do it
Thanks
Jacko
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minitici
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| posted on 14/9/13 at 07:05 PM |
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Needs to be dried in an oven for about 24 hours before bending to avoid stress crazing.
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austin man
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| posted on 14/9/13 at 07:23 PM |
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hot air gun gently heated or it will blister
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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jacko
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| posted on 14/9/13 at 07:38 PM |
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Would it bend by using a steam wall paper stripper and bending it over a 6ins pipe ?
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bi22le
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| posted on 15/9/13 at 09:41 AM |
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May do if enclosed and left long enough. We bend lexan everyday at work but its a tight rad so we heat it with a hot wire over 10mins period and
place it in a wooden jig.
The problem you will have is getting consistent heat and shape over the open rad along its whole length. I think a heat gun will not work.
Deffinatly spend the time and make up a stable and solid jig to bend and fix it in place. I would then suggest buying second hand a electric element
indoor heater and using that at a distance. Maybe even dismantle it and rig it up to heat along the whole length of plastic.
I would also get the idea of having a nice easy to see through bend put of ypur mind. It will warp and distort alot creating ppor visibility through
it, regarfless of how much care you take.
Good luck.
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40inches
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| posted on 15/9/13 at 10:18 AM |
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As bi22le says, it can be difficult, however I bent a fly screen for my 2B using a hot air gun, with a plumbers heat mat over aluminium foil, using
the scuttle as a former
I did as suggested and warmed the polycarb with a heater, until it was too hot to touch, laid it over the scuttle and applied heat with the heat gun,
allowing the poly to droop into shape (with a little pressure on the end of the sheet). The problem is that if a small section of the Poly cools
slightly, it will crack and craze.
This worked well, but I would suggest using offcuts to practice, and make sure that you don't buy MarGard poly, this will not bend  and
I think I would use Perspex if I had to do it again.
Poor quality photo, but you can see the bend.
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