Without infusion mesh, and without peel ply


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Gilbert
Gilbert
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Isit possible to make an infusion partwith both sides glossy?
Part size about 50mm x 700mm x 4 mm thickness

thanks for your help


Hanaldo
Hanaldo
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Not without using an internal flow media of some sort. You need something to get the resin to flow, especially at 4mm thick. 
Gilbert
Gilbert
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Thankyou for your reply.

If I give a mesh in the middle of the laminate, Imeans 2mm carbon a mesh 2 mm carbon, the mesh remains forever in laminate, whatabout the strength of the laminate. It is a heavily loaded part, like a bowlimbs. I am afraid of an internal delamination.

Whatdo you think?


Hanaldo
Hanaldo
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Yeh you don't want to use a regular flow mesh inside the part. You would need to use an internal flow media like Soric, 3D PET core, Corecork or the likes. If you used a 3mm core, then you would only need 2 layers of 200gsm carbon on either side of it to give you your 4mm thickness. 

If the thing needs to be solid carbon with no core, then I would say it is out of the realms of infusion and would need to be done with pre-preg. Which is actually probably the better option anyway. 
Gilbert
Gilbert
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Thanksfor the answer,
Prepreg is a good thing but I lack thenecessary equipment to workwith this material.
Seeking a kind of mesh, but what withepoxy gives agood bond.
What do you think of the Fiber Glass mesh how is used as a reinforcement in the construction industry.


Hanaldo
Hanaldo
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That's just very loosely woven fibreglass, it's not a flow media. You need something with channels that don't get closed by the vacuum. The only thing that would work is a core material with channels to accommodate resin flow. 
Gilbert
Gilbert
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Maybeit's better if I proceed traditionally.
With peel plyand mesh andafter them sanding the rough side andfinish with coat.
Any suggestions for the good glossyfinish?


Hanaldo
Hanaldo
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I think this is the easiest solution. 

I would recommend Duratec Sunshield top coat. It's UV resistant as you can tell by the name, but more importantly it is a high build coating so it builds and fills really well. It would be possible to spray directly onto your peel ply surface and achieve a perfect finish, whereas with a regular automotive coating the peel ply would be a bit too much texture and you would need to do some prep-work. 
Gilbert
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Thank you for theadvice, I will try this way



FLD
FLD
FLD
posted 9 Years Ago HOT
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How about closed mould techniques like RTM?  If I've got the idea right it's pressurised resin flow but it does seem to need CSM or combimat type fabrics.  Surely you could use one of these fabric types as a flow medium inside carbon laminate to achieve a mould finish on both sides.  You would have to make two moulds though!
GO

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