Talk Composites - The Forum for Advanced Composites

Resin void areas

http://www.talkcomposites.com/Topic27057.aspx

By MikeG - 5/21/2018 5:03:11 AM

Hi,
I am working on a large Carbon Fiber Infusion part and did our initial run yesterday. The part is relatively simple in shape, however the layup is set up as follows:
Bottom layer: 12K 2x2 and is 0.762mm thick
Middle layer: Core material similar to your EasyCell75G Infusion Grooved PVC Foam
Top layer: 12K 2x2 and is 0.762mm thick

We did struggle with getting the proper vacuum on the part, however, i believe we had tight system. We ran the part and then waited 24 hours to pull the bagging etc off. We found that when we flipped the part over there were voids in the resin. We are trying to trouble shoot the issue... we believe it is either that we didn't pull out all of the trapped air before we infused, or that the resin wasn't mixed well, and let stand long enough before running through the part.
Can you take a look at the attached pictures and let me know your thoughts... any help would be appreciated.
Thanks so much.

Mike
By MikeG - 5/21/2018 3:51:51 PM

 
Warren (Staff) - 5/21/2018 3:31:26 PM
Throttle the resin feed with a line clamp to control how quickly the resin flows.  You can also clamp off the vacuum feed when it is complete and leave the resin feed open for another 10-20 seconds to allow in a bit of extra resin.

Great advice.. We'll do that on the next run...
Much appreciated...

Mike