took cover off today and after a short period since it was fitted small internal hairline cracks have appeared on the curves 
luckily I have got enough material to make 2 more but do not want the same happening again 
Windscreen cold bending
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welshhealey
- Posts: 267
- Joined: Sat Feb 07, 2009 2:14 am
- CMBA Member: 71
Windscreen cold bending
Can 4mm polycarbonate be cold bent into shape of windscreen ? took cover off today and after a short period since it was fitted small internal hairline cracks have appeared on the curves luckily I have got enough material to make 2 more but do not want the same happening again
took cover off today and after a short period since it was fitted small internal hairline cracks have appeared on the curves luckily I have got enough material to make 2 more but do not want the same happening again 
Re: Windscreen cold bending
It can be cold formed but for 4mm sheets the minimum bend radii is quite large between 400 and 700mm depending on grade. See page 15:-
http://www.theplasticshop.co.uk/plastic ... _guide.pdf
If you can make even the most rudimentary former you could have a go at hot forming it using a heat gun. Any sort of permanently formed curve wil help to reduce the stresses in the screen.
http://www.theplasticshop.co.uk/plastic ... _guide.pdf
If you can make even the most rudimentary former you could have a go at hot forming it using a heat gun. Any sort of permanently formed curve wil help to reduce the stresses in the screen.
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welshhealey
- Posts: 267
- Joined: Sat Feb 07, 2009 2:14 am
- CMBA Member: 71
Re: Windscreen cold bending
Cheers Floater 
Will give it a go with a bit of heat,... it will give me chance to get my posh heat gun out of it's box ! 
Will give it a go with a bit of heat,... it will give me chance to get my posh heat gun out of it's box !