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Author Thermoforming Lexan
Steve
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Registered: 30th Mar 02
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13th May 12 at 08:21   View Garage View User's Profile U2U Member Reply With Quote
Going to do a little experiment today by trying to thermoform a small piece of scrap lexan i have into a shape by clamping it round some form of curve then putting it in the oven, with a view to maybe making my own thermoformed rear windows for pumas out of lexan

the temp that its meant to be thermoformed at is 135degrees

but i have no idea how long I should leave it in there for, any idea?
chris_uk
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Registered: 8th Jul 03
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13th May 12 at 08:42   View Garage View User's Profile U2U Member Reply With Quote
Try an hour.
Steve
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13th May 12 at 08:50   View Garage View User's Profile U2U Member Reply With Quote
Jesus that long lol I was going to.give it 15 mins
Steve
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13th May 12 at 09:35   View Garage View User's Profile U2U Member Reply With Quote
finished my experiment





after 30 mins





cool, might see if i can sort a boot lid now for the glass for as cheap as possible to use as a mould
John
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13th May 12 at 09:39   View User's Profile U2U Member Reply With Quote
What's the plan to keep something bigger up to temp?
Steve
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13th May 12 at 09:43   View Garage View User's Profile U2U Member Reply With Quote
take it to a bodyshop or powdercoaters with an oven was my thinking
ed
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13th May 12 at 09:46   View User's Profile U2U Member Reply With Quote
Does Lexan go rubbery when heated like acrylic? Usually takes about 15-20 mins to get acrylic up to temp depending on a few obvious factors.
Steve
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13th May 12 at 09:47   View Garage View User's Profile U2U Member Reply With Quote
kind of just seemed to go soft and bendy, 30 mins seemed about right
taylorboosh
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13th May 12 at 09:50   View User's Profile U2U Member Reply With Quote
That's cool as fuck...
smcGSI16V
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Registered: 26th May 03
Location: Farnborough Drives: Thurlby 888 CDTi No.98
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13th May 12 at 09:58   View User's Profile U2U Member Reply With Quote
Is that gas mark 3 or 4.
taylorboosh
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13th May 12 at 09:59   View User's Profile U2U Member Reply With Quote
Microwave on 5
sc0ott
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13th May 12 at 10:00   View User's Profile U2U Member Reply With Quote
Will it blend?
alan-g-w
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13th May 12 at 10:41   View User's Profile U2U Member Reply With Quote
Put a couple of bits of plate running along the edges under the clamps to bring the corners in next time maybe
Steve
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13th May 12 at 10:46   View Garage View User's Profile U2U Member Reply With Quote
oh yeah will be using more clamps and making sure it all lies flat in the final attempt
John
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13th May 12 at 10:59   View User's Profile U2U Member Reply With Quote
You'll have to get some way to clamp the middle possibly? Or will it form properly if it's just clamped along the edge?
taylorboosh
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13th May 12 at 11:07   View User's Profile U2U Member Reply With Quote
If he does it how imagine it will just form to shape
Steve
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13th May 12 at 11:09   View Garage View User's Profile U2U Member Reply With Quote
It's a good point won't know until I try and clamp it round, window isn't as curved as what I made mind
Alex_Rally
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13th May 12 at 11:45   View User's Profile U2U Member Reply With Quote
ive got a puma boot you can have for £15
infact ive got 2 lol
Steve
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13th May 12 at 11:49   View Garage View User's Profile U2U Member Reply With Quote
I don't imagine postage would be cheap though lol
Alex_Rally
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13th May 12 at 11:50   View User's Profile U2U Member Reply With Quote
megga road trip lol
Steve
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13th May 12 at 11:55   View Garage View User's Profile U2U Member Reply With Quote
balls to that lol, can you cut the glass out? i reckon postage would be reasonable for just that
Alex_Rally
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13th May 12 at 12:01   View User's Profile U2U Member Reply With Quote
il have a look,
Steve
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13th May 12 at 12:02   View Garage View User's Profile U2U Member Reply With Quote
cheers dude
ed
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13th May 12 at 12:44   View User's Profile U2U Member Reply With Quote
You know what you could do - vac bag the plastic over the glass and then heat it. Obviously don't put it under full vacuum until the plastic has become malleable so you don't break the glass. You ought to get a good shape that way.
Steve
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13th May 12 at 12:46   View Garage View User's Profile U2U Member Reply With Quote
Trouble is I don't have the heating facility's to play about like that would literally have to clamp it to glass and.give it to powdercoaters for half an hour

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