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All About Guns What's your weapon of choice, and why? Discuss the beloved speargun here! |
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10-26-2018, 03:58 AM | #16 | |
Shooter & Shooter
Join Date: Nov 2014
Posts: 955
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Re: Carbon Wrap
Quote:
Yes, peel ply was specifically made so that you could do secondary bonding without having to prep the surface, e.g. no sanding needed - just pull off the peel ply last minute and do your next operation onto that surface. What do you use for top coat? The laminating resins I have actually don't really work well for top coat. They haze or yellow pretty easily. |
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10-26-2018, 04:01 AM | #17 | |
Registered User
Join Date: Nov 2016
Location: Bilbao (Spain)
Posts: 445
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Re: Carbon Wrap
Quote:
For our uses the tube is much easier, because you only have to worry about making the ends airtight. The so called tacky tape is used for this purpose. This is what I use: https://www.castrocompositesshop.com...#/154-size-5_m Several widths available. Unless you get a fancy valve/outlet of some kind, you will have to make a passage for the hose to exit through one of the ends. Here is where most of the problems (leaks) show up. It is not easy to create 100% wrinkle free seams and air will leak in through these wrinkles. The Ziplock bags are great and airtight (pretty much). So are the water bladders used for backpacking and such. Great engineering there. The problem is, again, the outlet for the hose AND finding those comercial ready made bags in the propper size. Mikel |
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10-26-2018, 04:06 AM | #18 | |
Registered User
Join Date: Nov 2016
Location: Bilbao (Spain)
Posts: 445
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Re: Carbon Wrap
Quote:
UV filter and designed specifically as Top Coat. Works great and doesn't run/drip easy (although I use a rottisiere setup anyways) Mikel |
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10-26-2018, 04:17 AM | #19 | |
Shooter & Shooter
Join Date: Nov 2014
Posts: 955
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Re: Carbon Wrap
Quote:
I got you on the rotissirie, I have the parts somewhere. All this stuff is so cheap here in China, so I just need to whip up some brackets on my 3D printer and I am good to go. Now, since you seem to enjoy this as much as I do here's a trinket for you: Some cool tinkerer recently designed an Arduino powered vac pump controller with amazing features. Once, I find the time, I'll prolly make one, too. But I have a pro SMC pressure switch on my pump already (again, dirt cheap second hand in China) so I am not in a hurry: https://www.rcgroups.com/forums/show...m-Gauge-Switch Another one here: https://www.rcgroups.com/forums/show...ump-controller I love this internet age where people just design pro level featured stuff and give away the designs for free! It's just amazing. |
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10-26-2018, 05:55 PM | #20 |
Registered User
Join Date: Sep 2013
Location: Trinidad, West Indies
Posts: 41
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Re: Carbon Wrap
Thanks for all the great information guys( would still be totally lost without it haha)... I have ordered all my supplies , they will take a while to reAch but once they do I’ll do an update on how the guns come out.. thanks!!!
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10-27-2018, 03:27 AM | #21 |
Registered User
Join Date: May 2009
Posts: 3,292
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Re: Carbon Wrap
I put the sleeve on the gun when the gun is totally dry. I think using adhesive spray complicates things as you can't really move the sleeve around after it is on and might not allow a smooth final pull back when you want the cloth to drape nicely over the gun. On a long gun I actually have two suction areas (one muzzle area and one on handle area) to ensure a good pull down. Another thing is that the cloth changes once you wet it and you want to be able to move things around … which might be difficult to do if you use adhesive spray. I do use adhesive spray when making handles with CF tape.
As for vacuum leaks … I think you should keep vacuum on till the gel time of the epoxy, especially if you will not be checking in on the progress every few minutes. A leak can basically make it impossible to fix the gun if it hardens and is just not worth the risk. For a vacuum bag I now use large sleeves that you can easily slip a fully clothed up gun into. This means you only have two small sides to make leak proof rather than have to make up a full bag. This has made making a bag dramatically easier and quicker and more leak proof … plus you only need a few strips of the sticky tape to seal the bag. I actually can even get a way with vacuuming only a part of the gun (usually muzzle or handle area) without losing vacuum. If you have not used these vacuum bag sleeves I really recommend you give them a try! |
10-27-2018, 04:01 AM | #22 | |
Shooter & Shooter
Join Date: Nov 2014
Posts: 955
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Re: Carbon Wrap
Quote:
As for the small DIY silicone bag, the advantage is that I can get lazy on the pleating and it being silicone, it releases easily, too. If you are using breather ply, besides absorbing excess resin, it works to distribute the vacuum evenly all through the bag. Or rather, to all of the area that the bleeder ply covers. Last edited by Diving Gecko; 10-27-2018 at 04:14 AM. |
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10-27-2018, 01:48 PM | #23 |
Registered User
Join Date: Sep 2013
Location: Trinidad, West Indies
Posts: 41
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Re: Carbon Wrap
I found some vacuum sleeves from
https://www.fibreglast.com/product/P...Peel_Ply_Tapes Vaccuum bags in tubes comes in different widths 24” 48” and 60” Ordered some of the 24” |
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