How to vacuum bag
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- เผยแพร่เมื่อ 16 พ.ค. 2024
- Learn, step by step, how to make a part, using vacuum bagging.
See how easy it is to get a great surface finish.
You can use this technique with fiberglass, carbon fiber or Kevlar.
I used the wet lay up method, where you apply the resin using a simple brush.
This video helped me understanding the usage of the peel ply, breather, or bleeder, and the vacuum bagging. Thanks a lot.
Brilliant demonstration. Thank you.
great video, thanks!
Thanks mate, that was super helpful and informative.
Very well made.
Bravo,bel lavoro!
Great video, thanks a lot.
Great video thank you! Question, the two part polyurethane paint you applied first in lieu of gel coat. how is the adhesion to the fiberglass? will this work equally well with epoxy resin or polyester resin?
I'd like to know how to manufacture a geometry that isn't symemetric but it need two shells, it is a wind turbine blade
I think a mold with a mold flange and use of vacuum bag tape or butyl tape is better for larger parts and probably more efficient as far as materials go. While the tape may cost more than silicone, it's more effective for creating pleates without making a mess with the silicone and potentially getting it on the mold or the part.
What kind vacuum you use sir?
I have a question. So when you are removing the air from the mold. You check the vacuum gauge for the vacuum created. When you reach the desired vacuum how do you close the vacuum bag hose ensuring that air doesn't enter into the bag?
Outstanding ! Always wonder how peel ply could ever be removed ..resin leaks through pores, join up and locks it down ! O_o
What breather fabric should I use?
peel ply substitute was it or a dedicated pee-ply fabric???
or just simply a polypropylene mesh?
Hi, I want to know the type of silicone.
This video was helpful to me.
Thanks
Thanks for watching. You can use any kind of silicone found in stores like Home Depot.
@@3DTechMaquetes thank you for your advice.
@@3DTechMaquetes Thanks for the video, lots of useful techniques shown :)
One question, do you wait for the silicone to cure or do you apply the vacuum while it's still wet?
I apply while still wet. Thank you!
What about bagging a positive or modeless forms?
I was looking for this breather fabric and the ply, so many kinds of them. What kind do you use?
I am not sure. The type I used is the only one that I could find here in Brazil
interessante. usando pintura polyester com resina epoxy. imaginei que fosse rolar uma delaminacao no desmolde. vou comecar a aplicar verniz no molde antes de fazer infusao de carbono agora pra ver o que da. obrigado pela dica.
Na verdade o verniz é PU. Eu nunca pintei poliéster no molde, mas não imagino que possa causar problemas.
What kind of plastic is the bag made of?
If I dont have the resin microballoons,what other I can use to avoid resin running out .
You may use baby powder
What kind of paint is that? Do you mean gelcoat? Is it capable to withstand with epoxy exotherm?
I used PU paint. The same used to paint cars. I had no problems with the heat.
He painted the mold, not the fiberglass part. A mold could be painted with any kind of glossy surface finish, doesn't really matter. A gelcoat would be used as the first layer in a fiberglass or carbon layup, as gelcoats can dry without exposure to atmosphere.. When you remove the finished mold, the gelcoat would be the outside layer that you see...
Wow cute
Hi can you tell how much vacuum you need? Do you need near perfect vacuum or os like -0.4bars enough?
I think that for this kind of application, 0,4bar is more than enough
as much as you can get really... the more the better your composites ratio will be to a certain point.
Hi, could you do this exact same prosess for making of carbon fiber? And which type of carbonfiber should I use? Can i also use resin?
Thanks
Yes, the same process. The carbon fiber must be a 90/90 weave, a bidirectional cloth.
@@3DTechMaquetes okay, so u dont need an oven? Im looking at easycomposites.co.uk, and wondering what i need to buy
What you can do is a hot box. I have done one several years ago and set the temperature to 55 Celsius degrees. You should see the resin specs, but for hobby I beleive it does not make much difference.
O ponto de sucção deveria ser posicionado sobre o breather
Não dá pra ver muito bem, mas tem uma mangueira que vai até o tecido.
Did you spray the 2 part polyurethane paint?
That's right
How to decide what vacuum pressure should be applied
the more the merrier
Oi! Você espera o silicone secar ?
Não, deixo ele mole
@@3DTechMaquetes Obrigado!
Is it possible to re-use the bag?
Yes, it is!
What is your mold made of?
Polyester resin and fiberglass
what vacuum pump do you use? thanks
It is a 5cf/m. More than enough
@@3DTechMaquetes brand name? Where I can buy it? Fitting size/thread pitch? Thanks
@@zyx296 I live in Brazil, so I think that will not be available to you
@@3DTechMaquetes dang okay 😣🥺
@@3DTechMaquetes could you please tell pressure applied
only issue I see here is you should have cut the breather cloth larger so that it goes all the way to the tube inlet. No point of the breather if the vacuum gets trapped/stuck by the bag at the inlet.
Thank you for your advice
@@3DTechHobby looks like the vacuum did pretty well regardless though!
how many hours after vacuuming?
It depends on the resin, but usually 2 or 3 hours is enough
@@3DTechMaquetes thanks ...
Обрезать края детали можно не вынимая из матрицы.
Why are you using silicon. Takes more time to go off that the resin. Use butyl tape. Sticks instantly. Doesnt leak air
But I do not wait the silicon to cure.
@@3DTechMaquetes I agree butyl tape is probably better in a number of ways, but it can also be a pain in the butt sometimes to find and fix leaks, especially if the tape has gotten dirty or been exposed to resin...