Ive been doing all primed infused parts with epoxy, I now have a couple parts that are done in clear and I noticed but not really to bad but looks dry in a few spots. Is this from leaving the vac pump run and possible drying out part to much. This is a bigger part and holds vac good but just afraide to shut pump down. Any ideas.
Silly question but seems to be lots of people thinking they are pulling to much resin out of their parts. Why don’t you guys run a vacuum switch on the pump? Set the required vacuum range and it with shut off and turn on as required.
Any idea where I can get one and how do I incorporate it into my setup/pump
we were thinking the same thing but would like to know who has a switch that would work well.
Am I the only one that has never pulled too much resin out? The ONLY way that will happen is if you have a leak.
When you pull a vacuum, the bag puts pressure onto the laminate, thereby consolidating the laminate. You suck out all the air.
You add resin into the voids slowly, and the resin fills all void areas (non-solid areas of the laminate)
How will resin be sucked out? What is going to replace the space the resin was in? if something replaces it, it means it is being introduced into the vacuum bag. This means you have a leak. Leaks are bad. Always.
Now, some people like to lower the vacuum pressure. Sure. If the part is cosmetic, and you want a heavier and resin rich part, that is fine. But that does not change the fact that once resin fills the vacuum freespace areas, it can not get sucked back out unless there is something to replace it (ie: air from a leak)
that makes sense, the only other thing I can think of is I cleared the part the night before and maybe I shouldn’t have had it sit that long. no leaks in bag.
After thinking about my problem I think I might have a couple issues one being im going to try and slow down my resin flow and second is I never degased the resin so maybe that could be more my problem. I’m new at this stuff and always seems like you learn something new.
those are two things to try, definitly. Degassing will get rid of most air in the resin, and slowing the resin flow will allow the resin to soak into the tows more, before there is any chance of a void to be racetracked, and stays there.