Talk Composites - The Forum for Advanced Composites

Issue with imprint left on mould after infusion

http://www.talkcomposites.com/Topic37151.aspx

By emkayvr6 - 6/16/2020 10:51:11 AM

Hi
I’m having issues with an imprint being left on my moulds and a little on the surface of my parts after I’ve infused the carbon.
Moulds were made using uni mould system, 5 layers of wax used for release, 1st layer of carbon is the pro finish. I have used a light spray of fusion fix, sprayed into the cloth before placing in the mould. Moulds have not been post cured
Just wondering if anyone had any ideas, my moulds now look like carbon print and to remove I’m having to 2000grit sams then polish, and my part has a slight dull finish on it but not all over but just sort of fibre in one direction, sorry not the easiest thing to describe and I tried to upload a pic but it’s not letting me upload
Any ideas
Cheers
By okkim - 9/8/2020 10:36:02 AM

I'm not sure what it is, but at least it was supposed to be vinylester: https://composite24.co.uk/gelcoats/vinylester-tooling-gelcoat

I don't know if it matters, but first I applied gelcoat to this mould too, but since I saw that how difficult the layup was I decided to remove it. I was very easy remove with fingers. Then I layed up the carbon fiber, without applying more relase agent before since what I understood, it isn't needed every time. I used this relase agent: https://www.jacomp.fi/wp-content/uploads/2017/12/marbocote-227-v6.pdf