andy o
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| posted on 26/4/07 at 03:07 PM |
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perspex..ing question
i'm thinking of making a wrap round aeroscreen for my fury i.e.it will taper down to the rear of the doors.is it possible to bend perspex(with a
heatgun)?also whats best tool for shaving perspex?
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Hammerhead
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| posted on 26/4/07 at 03:11 PM |
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afaik you can use a heat gun but if it's too hot you mayget bubbles forming. It will also be difficult to have a considtant heat over the area
you want to bend. The technique you need to use is line bending.
I'm not sure how hairy perspex is but you could always try a wood plane if you want to shave it. Then maybe flame polish the end result.
Just go for it! 
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CAD Monkey
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| posted on 26/4/07 at 03:12 PM |
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from what I remember from school perspex bends really well - we had a heat bender that looked like a single bar from an electric fire, this made sure
the bend was neat (small scale though).
You can get a blade for a jigsaw for perspex, I used to clamp 2 bits of hardboard either side to minimise splintering, then use a stanley blade
perpendicular to the edge and scrape it along (like removing fibreglass flashlines).
HTH
Stewart
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Mal
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| posted on 26/4/07 at 03:14 PM |
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Screen Material
You really need to use polycarbonate sheet. It is a much tougher material than perspex and will not shatter.
I used some for the first time recently and to my surprise was told than I could fold it in a sheet metal bending press. I did so and found that it
would fold similar to sheet metal, but with a tendacy for it to have some spring back.
Mal
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andy o
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| posted on 26/4/07 at 03:19 PM |
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when you say folding machine do you mean a press brake?so if i made tool with a large radius it would bend ok
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andy o
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| posted on 26/4/07 at 03:19 PM |
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when you say folding machine do you mean a press brake?so if i made tool with a large radius it would bend ok
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cadebytiger
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| posted on 26/4/07 at 03:24 PM |
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go for lexan! very easy to work with. you can just cut it with a wood blade in a jigsaw and run a file down the corners to clean it up.
i think it bends well. not sure though as i did mine straight but somone will know.
Also it is shatterproof which is nice to know!
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Hammerhead
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| posted on 26/4/07 at 03:28 PM |
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quote:
Originally posted by cadebytiger
go for lexan! very easy to work with. you can just cut it with a wood blade in a jigsaw and run a file down the corners to clean it up.
i think it bends well. not sure though as i did mine straight but somone will know.
Also it is shatterproof which is nice to know!
Lexan is perspex 
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iank
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| posted on 26/4/07 at 03:30 PM |
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Get some of the lexan/polycarbonate with the anti scratch coating.
Good information on advantages/disadvantages of perspex vs. lexan here:
http://www.gcip.co.uk/FAB/boat_car_windows.htm
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Schrodinger
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| posted on 26/4/07 at 03:48 PM |
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quote:
Originally posted by Hammerhead
Lexan is perspex
No Lexan is polyarbonate
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DIY Si
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| posted on 26/4/07 at 04:05 PM |
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Actaully it's a polyCarbonate.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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cadebytiger
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 posted on 26/4/07 at 04:08 PM |
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haha
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StevieB
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| posted on 26/4/07 at 05:27 PM |
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But getting back to the forming - if you bent it around a former and clamped it in place for a while (maybe subjecting it to a bit of heat), it should
retain it's shape to a fair degree.
As for finishing the edges, I used to used a but of wet and dry to give a nicely finished edge.
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DIY Si
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| posted on 26/4/07 at 05:51 PM |
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One cheat I used to do at school involved running a bit of glue along the cut egdes. It fills the little scratches up without having to polish them
out. Same goes for any little scratches on the faces.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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mangogrooveworkshop
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| posted on 26/4/07 at 06:33 PM |
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The material you want is Lexan MR5E abrasion resist both sides with good optical light transmission. Cut with a jigsaw or a speed control router.
Polished with soap and a buff or wet stone
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andy o
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| posted on 26/4/07 at 06:41 PM |
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is lexan mr5a easily bent and if so do you know where i can get some?
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andy o
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| posted on 26/4/07 at 06:41 PM |
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is lexan mr5a easily bent and if so do you know where i can get some?
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gixxerpat
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| posted on 26/4/07 at 07:55 PM |
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To clean up edges ,run a blow lamp arount it , its the best way.
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iank
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| posted on 27/4/07 at 07:51 AM |
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quote:
Originally posted by andy o
is lexan mr5a easily bent and if so do you know where i can get some?
I don't believe any of the coated grades are easy to bend. The place I linked to sell MR5E which looks like the right stuff for flat
applications, but I can't find MR5A on the web anywhere. They have a contact link so I'm sure they'd be able to help.
http://www.gcip.co.uk/EP/lexan_polycarbonate_sheet.htm
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Schrodinger
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| posted on 27/4/07 at 09:02 AM |
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It's a little way from you but you could try Ipswich Plastics 01473 270101
or you could try
http://www.edplastics.co.uk/
quote:
Originally posted by andy o
is lexan mr5a easily bent and if so do you know where i can get some?
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iank
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| posted on 27/4/07 at 10:01 AM |
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quote:
Originally posted by Schrodinger
It's a little way from you but you could try Ipswich Plastics 01473 270101
or you could try
http://www.edplastics.co.uk/
quote:
Originally posted by andy o
is lexan mr5a easily bent and if so do you know where i can get some?
EDP stock FMR-5E and say it can be cold curved.
http://www.edplastics.co.uk/Lexan%20Polycarbonate%20Glazing%20sheet.htm
[Edited on 27/4/07 by iank]
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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