Easiest way for making resin infused parts


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scottracing
scottracing
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yes this process is aimed at multi part production, we had a very good turnout at the Alan Harper Training / Demo last week at the NCC.

I will certainly be using it on some of my infusion tooling and possibly my semi production prepreg tools too.

SHaas
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Seams like a really cool option but only if you want to produce a couple of the same parts. If you are mostly doing single infusions so the silicone way would be much to expansive I think.
Dezer
Dezer
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scottracing - 11/30/2018 8:13:40 PM
You dont need anymore infusion media, thats one of the many benefits.

If you look at the smooth on.website in America it has materials similar to alan harper. You will need to spray it to get a decent coverage on anything other than flat.


I found a Alan Harper Distributor here who also provides silicone vacuum bag creation service, so I will not need to invest with equipment to make just a few bags.

I'm already arranging my first silicone vacuum bag! 
scottracing
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You dont need anymore infusion media, thats one of the many benefits.

If you look at the smooth on.website in America it has materials similar to alan harper. You will need to spray it to get a decent coverage on anything other than flat.
Dezer
Dezer
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I liked knowing this method, I have great difficulty with micro leakage in the vacuum bags.

I have some doubts:

In this method is still necessary the use of resin flow media, peel ply?

The other question , is there any way to make the vacuum bag without being sprayer? Here in South America you do not have any such equipment yet.

 Thanks!
Finnluxury
Finnluxury
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Hi Warren. I would recommend to go Alan Harper workshops. Or ask Blaise from Alan Harper to visit your company. They are super friendly and very professional with silicone bags. I think it would be good idea for Easy Composites to start selling the silicone that Alan Harper provides. Its quite simple to make the bags, when U see how it works. 

Hanaldo, I can send U some pictures later on. I have silicone square profile that I use to make the channel and after mould is ready, I change it to round one to get perfect finish. Are U doing the same way? Both ends of the silicone profile must end to the outer vacuum channel of the bag, This prevent any vacuum leakage to happen. 

scottracing
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There is an Alan Harper workshop about his silicone bags taking place at work next month. Check out the link, its a free event and I will hopefully attend it as i get to have some hands on with the technology

https://nccuk.com/reusable-vacuum-membrane-technology-workshop

Warren (Staff)
Warren (Staff)
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It is good to hear your experiences with a silicone bag system.  Do you have any pictures on how you are making the bags?


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant
Hanaldo
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Yeh I tried the sealing profiles but I just couldn't get them to work reliably. I'd love to see some pictures of yours if you have any you can show?? 

I would expect the release film extended the life of the bag a little bit, but it's hard to tell - it's still as good as the day I made it, but it's also only done 150 pulls. In any case, it has very little contact with the resin, so I cant see the resin degrading the bag too much.
Lester Populaire
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Finnluxury - 11/18/2018 9:11:14 AM
Hanaldo - 11/16/2018 2:24:48 PM
Yeh silicone vacuum bags are great. Biggest problem with them for me is they don't work with split moulds, at least not without sealing the flanges in another manner which makes it a pain. But for single piece moulds on any production run making more than 10 parts - hands down better than conventional vacuum bags.

Resin infusion aside, you should try it with pre-pregs! Now that's a treat! Biggest production run I've done was on a part for a go-kart, I had to make 150 of these little things. Initially I started out out resin infusing them with regular vacuum bagging, they took about an hour and a half each to make. Switched to pre-preg with regular vacuum bags and I dropped that to about 45 minutes. Made a silicone vacuum bag and I dropped it to 15 minutes for each part - with only the release film as wastage. 

Nice to hear your experiences! Smile 
Actually I have a sealing profile that works perfecty with split moulds. When U make a split mould, u just add this " square" profile between flanges and once the mould is ready, U remove it and add different proper size round sealing permanently to that channel. So when U tighten the flanges together this sealing profile will seal the flange perfectly and the sealing will be connected to the silicone bag vacuum channel. 

Did that release film extended silicone bag lifetime? Did u use Silflon to protect the bag with prepregs?

Do you happen to have a manufacturer and a name of these sealing profiles?

GO

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