The pics are in order. I’m thinking its pulling too much resin. Not sure how that happens
what’s your bagging schedule?
From bottom to top… Breather, peel ply, mold, peel ply, breather.
I haven’t pleated the bag, however I do make sure to hold the bag in a manner that it won’t bridge. Well the first one bridged I think.
Maybe I can use one of these flawed parts as a male plug?? So lay up, peel ply, junk part, breather. I don’t know
It appears you have not left enough bag to be pushed into the voids on the complex side of your mold. Give yourself some extra bag in there. Pull your vacuum slow to make sure the bag doesn’t bridge these gaps. Also, make some synthetic tools to push these problem areas into the mold after layup in B stage.
So make a male mold too? Or can I use the flawed part? Where exactly in the schedule do I put it?
I think the peel ply and breather underneath the mold is a bit excessive, but not the cause of your issues. However, I wouldn’t suggest wrapping the top breather around the mold because of the bridging problem you already have.
I wasn’t suggesting that. You could, but I think you’d have no problem producing the part with the bag completely pulled into the mold.
If you made any changes, I would increase the size of the flanges on the mold and bag directly to the mold allowing for pleats where necessary.
How much vacuum are you applying?
I’m using an airtech airvac 22 it pulls 25.5" of mercury at 80psi wall pressure. My wall pressure is 120. I’m assuming it can’t pull more than 25.5
I put the peel ply in the bottom just in case. It stays in there. Nothing has stuck to it yet.
You mentioned wrapping the breather around… It’s not wrapped around. Just a sheet on the bottom and a sheet on top.
I will add bigger flanges. I was gonna do that on my next mold. I’m curious what everyone uses for a “block” filler.
What is wall pressure?
Wall pressure is in a big building that has one big compressor. That air is distributed throughout the building.
I have 120psi but I assume my vac can’t pull more than 25.5"
You need to have perferated release film between your peel ply and breather. This will help reduce the amount of resin that will be bled from your part. And if after you put the perferated release film in and your breather gets that saturated with resin then you are using way too much resin. You should only have tiny resin dots in the breather after full vacuum is applied.
Another tip, if you do not already do is to pull a very light slow vacuum at first and use a rubber squeegie to press in the corners.
Lastly I would suggest you switching to infusion as its a far superior process. If in the event your material has a slight bridge in the corner the resin will fill these voids. Also your part will be pin hole free.
My first thought was that you need to get the material in the corners, AND make sure all layers, including bagging have enough excess to push in the corners. That can cause the resin rich areas (whiteish) AND the bubbles!!! That is so important, and highly noticeable in your parts. Sort out your technique and I think your problems will go away. You can try perf. release film also, and even less breather (cut it around the mold only, not 2x the size, etc)