Talk Composites - The Forum for Advanced Composites

problems in (to tight?) corners?

http://www.talkcomposites.com/Topic22774.aspx

By dubster - 2/21/2017 12:39:07 PM

helloEveryone.

 

I havea problem with my last project.  I just cant get a decent finish on thislittle part.  Al the straight areas are fine, just can't get these cornersright. I tried a few other setups but this one last night was even the worse imade !!

 

usethese parts:

 

-2layers of carbon fibre

-alstuff that can be sold in this kit on easy comp webshop as consumables.

https://www.easycomposites.co.uk/vacuum-bagging-starter-kit

so peelply / perforated film / breatherlayer / bagging film is all easy comp.

The laminating resin EP-L2-F-5 is usedfrom Easy comp also.

Itlooks that the bag closes in this setup complete everytime, but like the picturesshow, i have places where the is no epoxy at al.

 

I madechanges to the setup like: extra breather layer as I suspected this could helpme close the gap between carbon and corners. I’m sure that there is enough epoxy as the breather has thebreather has excess resin when finished.

I wasthinking 2 extra layers of carbon could help me also but I first want to hearover here if there aren’t any other things I’m completely missing?

http://i145.photobucket.com/albums/r206/klaasmartens/16838111_1835977583341799_2021129904_n_zpsrvzpsxym.jpg

http://i145.photobucket.com/albums/r206/klaasmartens/16839443_1835977593341798_1551155253_n_zpsvwpssuzt.jpg

http://i145.photobucket.com/albums/r206/klaasmartens/16839379_1835977563341801_1031097102_n_zpsg7yb2pcn.jpg
By Rich (Staff) - 2/27/2017 5:07:23 PM

Absolutely, for Infusion or PrePreg production, you always need to be running at full vacuum. For vacuum assisted wet lay, we find the best results are at lower vacuum levels as suggested above by Warren; the reason for this is that with too much resin, you ultimately draw more resin out of the part, through the release film and into the breather leaving you with low resin content and pin-holing or dry patches on the moulded face.