Airbox cover.. needs advice!


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alebassa
alebassa
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Hi guys!
I'm working on an airbox cover for my bike...
As you can see the cover has big recesses, and the weave is distorting a little bit... (there was also a problem on the bagging, but that is easy to solve in the next infusion)

With the plain carbon the distortion is almost acceptable (even if I don't like it because my eyes always go there..), but now I tried with the twill and even if I haven't made the infusion yet I have already seen that the distorsion is even bigger because the fibers are more free to move...

Do you think there's a way to make the fabric distort less??
Maybe I should try to cut separate parts of fabric for the recesses, and cut two holes in the main part but since the airbox is on top of the bike I fear to see the seam...

http:///www.biosairam.it/foto/airbox/air1.jpg

http:///www.biosairam.it/foto/airbox/air2.jpg

http:///www.biosairam.it/foto/airbox/air3.jpg


Alessandro
Warren (Staff)
Warren (Staff)
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only way to achieve less distortion is more than one piece of material.

To be able to get the neat cut lines and joins i would recommend ProFinish Carbon Fibre 2/2 Twill for the main flat area with holes cut out for the complicated detail.  You can then use normal fabric for the complicated ridges etc and when laminated you will have minimal distortions on the main flat piece and neat lines between the seperate fabric pieces on the detail.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant
wozza
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Warren (Staff) (25/07/2013)
only way to achieve less distortion is more than one piece of material.

To be able to get the neat cut lines and joins i would recommend ProFinish Carbon Fibre 2/2 Twill for the main flat area with holes cut out for the complicated detail.  You can then use normal fabric for the complicated ridges etc and when laminated you will have minimal distortions on the main flat piece and neat lines between the seperate fabric pieces on the detail.




Have to agree. You will find that if you are careful during the lay-up once infused any join lines are hardly noticeable. Or you can go the other way and instead of trying to conceal the joins make them obvious, part of the design. You could use different weaves for the recesses etc. Done right it can work well and make life easier.

Warren

Carbon Copies Ltd
alebassa
alebassa
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Ok, I got it... I will try to make it in three parts, I don't have profinish but will try glueing some fg in the back before cutting.

Another thing I would like to try is to put the twill 45 degree with the recess because it seems it coluld distort less.

I will tell you the results..

Yesterday I demoulded the part made in one piece with twill, but the distortion was even more then with the plain carbon..



As you can see I also had a problem of stiching to the mould, so I had to breack the part to pull it out...

The resin has attached to the clear in the mould.... I had cleared it since I had to make some sanding in the mould and it seemed a good idea...

I think next time I will not clear the moulds again! Or at least put also pva on the easylease (even if it seems a nonsense)





Alessandro
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