Silicone bags, infuse or VPI & general discussion


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Jones
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Im looking into using silicone bags instead of the disposable nylon bags. mainly in order to deal with problems such as leaking bags, bridging, reducing consumables, as well as reducing the time it takes. Right now im still in school so doesn't have too much cash to throw around, I have therefore opted to go for brush on silicone bags. I have looked into using either Alan harpers starter kit or the ez brush silicone from smooth-on.

Mainly im looking inte you guys opinions regarding the subject as there is not alot of information out there apport from a few videos and articles but if feels like no-one is talking about it on forums and such.

what are you guys thoughts regarding:
brush vs sprayed silicone and brands.
distributing epoxy/resin. (all in one shot Alan Harper style, gravity fed/resin infusion or injecting with machine etc)
sealing profiles. (on flange, routed grove, wax strips etc)
flow distribution (morph runners, resin runners, Alan harpers REFLOW Flow Promoter, regular flowmesh, core or reinforcement with flow properties etc)
just wanted to mainly get the discussion started and your experiences and opinions regarding it all.



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Jones
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Thanks Matthieu and Oklemont for your replies! 
Feels like regular bags is the way to go, and it seems like I have some rethinking and practice to do in order in terms of my bagging process. 
I am very much intrigued to at least try to make silicone bags for the parts, as I have spent so much time thinking about using the process XD.

What I think about using is the following:
sealing and vacuum distribution like picture (1) see below
vacuum port as a hole in the mold flange below the sealing profile
Either make the part thickness using sheet wax, wet lay or infuse what do you recommend? (need to be careful about bringing) 
Resin flow by building these into the bag: https://www.kaupo.de/shop/en/VACUUM-BAGGING-SYSTEM/REFLOW-Flow-Promoter.html
Pour equal parts easy composite IN2 epoxy in each of the segments then cover and pull vacuum (Alan Harper style: https://www.youtube.com/watch?v=VdWm_Gg08Yw)

and as I am already going to lay both the carbon fiber and glass layer at 45/45 degrees in order for the part to flex easier, I can drape it into the mold as a single piece of cloth. as I am okay by leaving the 0.5 mm grid structure the flow mesh create on the final part the layup will be extremely fast.
I will use a brush on system for the silicone and im thinking the followup bags can be made using already finished parts cut to shape as they will have the flow mesh grid like structure already built into the part.

I could slightly modify the viscosity of the epoxy by altering the sousvide style water bath im already using to heat up unmixed epoxy resin. I could even use the fast hardener and possibly further modify the epoxy to have even fast turn around times.

Idk would it be worth a try? or am I just wasting my time and money? 

(1)



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Jones - 6 Years Ago
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