Talk Composites - The Forum for Advanced Composites

How to do letters with Prepreg

http://www.talkcomposites.com/Topic27174.aspx

By SHaas - 6/6/2018 8:34:52 PM

I have a problem with my actual project. I am trying to copy the metal doorstep(?) of my car. The brand Name is pressed on it . I havedifferent imperfections between the letters but I have no idea to makethis better.I used xc110 210 Prepreg and tried to push everything down, but because thesign is overall about 10cm the space between the letters is pretty tight. So I do not think it was possible to press everything perfectly down. Next I used the xc110 450 and made a debulk. Then again a 210 and in the oven. Thevacuum of the bag was not perfect but I ran the pump all time so it should have been sufficient.I have seen that there was a topic about that, but after all I found no solution in the thread. Has someone a tip for me/practical knowledge how to solve that issue? Perhaps debulking after the first ply? Or lay very small snips of prepregs between the letters before laminating?
Thanks
By f1rob - 6/22/2018 9:07:10 AM

Debulk  your 1st ply flat,don't attempt to push into letters.
With a 26 scalpel blade cut through the centre of each bridged letter,following the shape of the letter.
Pull single strands of the heavy cloth out so you have a carbon "bootlace"
Use this to fill the letters detail slightly proud.
Go over with your heavy cloth an you haven't got to press it into the letters
When you cut with the 26 cut blade up so you don't scratch the mould