Talk Composites - The Forum for Advanced Composites

Early troubleshooting with air voids, pin holes and dry spots

http://www.talkcomposites.com/Topic15122.aspx

By JakeMiddleton - 2/18/2015 5:04:29 PM

http://www.talkcomposites.com/Uploads/Images/8ffb4164-077b-4160-bf85-a111.JPG http://www.talkcomposites.com/Uploads/Images/098991c6-92ee-4aef-a8f1-f01d.JPGhttp://www.talkcomposites.com/Uploads/Images/4bbed813-1dee-46e6-a15b-b943.JPG Hello I am embarking on a project to improve the concertina (a small accordion traditionally 6 sided) ergonomically, part of this is done by reducing the weight with carbon fibre components. The two components I am making are the ends and here is a picture of one of these ends, the components  are quite small at 200mmx120mm.  I am using resin infusion and the problems I am running into are dry spots, small bubbles and large voids (see images). I am using the large epoxy mould making kit and I have included an image of my mould. I have tried to push the bag around into every contour but still suffer from these problems. What would you guys advise?
By Warren (Staff) - 2/26/2015 3:56:27 PM

An alternative solution would be the use of ProFinish Carbon Fibre 2/2 Twill especially for the recessed bit. You could easily cut a neat square to fit in there.