I’m new to resin infusion and would like a bit of advice with a problem I have encountered with my first parts. I’ll do my best to explain.
Each mold makes two parts and I have done 2 runs for a total of 4 parts. My results are 1 part perfect and 3 parts with voids and pin holes in the surface. What causes this? Is it trapped air?
I’m using very low viscosity PRO-SET INF114 resin and INF211 hardener. It wets out really fast is this part of the problem?
Here are some pictures.
Are the problems always at the same place? If yes It would say your mould might be micro porous.
Have you degased your resin?
I did not degas the resin. I guess I should? The problem is not always in the same place.
Tht it will be. Degas your resin. The MTI hose minimizes the enclosed air, but if you do not degas there is so much air sometimes that it will cause visible problems.
Degas the resin and your parts will be perfect.
If you want, make a test with normal spiral and not degased resin, then you will see the difference. There will be much more voids and pinholes than now.
How fast is your infusion and how many layers is your stack? Maybe you’re infusing to fast. That sometimes is the cause for issues and voids. And also around that hole it may be a bridging issue? Very minor but I can’t really tell.
I would first degas your resin like others have suggested, Then maybe slow your infusion by not fully unclamping the inlet hose when you infuse but keep it slightly pinched.
Or use a slower infusion mesh. (which reminds me I have to post the chart by Airtech, which I only have in hardcopy. Will ask for a PDF version)
Thanks everyone for the advice I will give degasing the resin a try as well as slow down the infusion with a clamp.
It’s a 3 ply layup with (2) 5.7 oz layers and (1) 19.7 oz layer.
The first two parts were with (3) 5.7 oz layers and they seemed to be the best.
Whats the diameter of your vacuum and resin feed hose?
1/4 inch on both feed line and vacuum.