Talk Composites - The Forum for Advanced Composites

Problems with air bubbles

http://www.talkcomposites.com/Topic19473.aspx

By kropucnik - 10/7/2015 5:22:15 PM

Hi, 

Newbie here. I am trying with making a part and i can't get rid of the bubbles. 



I usually get a lot of small voids and few huge bubbles. I prepare the mould with 5 coats of buffed wax (Axel PasteWiz) and a layer of PVA for a sure release. I heat the mould with a hot air gun and also heat the mixed resin and hardner. Then i apply 6 layers of carbon fibers, heating in between every layer. 

Any idea what I am doing wrong?
By Fasta - 2/18/2016 8:16:30 AM

You can roll every layer, wet it out and roll lightly over the fabric with a metal bolt type roller (or other). This flattens the weave a bit and squeezes air out of the material and gaps.

Then add another layer.


http://www.ecfibreglasssupplies.co.uk/watermark.axd?size=large&imgurl=images/Product/large/2653.jpg