Talk Composites - The Forum for Advanced Composites

Hose - Bag fittings

http://www.talkcomposites.com/Topic2040.aspx

By shalco - 6/25/2012 9:37:28 AM

Hi

I'm very new to all this so please be gentle!

I tried my first infusion mould at the weekend. After perserverence I seem to be struggling with leaks around the hose - bag seals.

However, what looks very simple in the online videos...ie putting the hose through the bag & into the silcone connector is always causing me leaks. I've tried tiny knicks in the bag to a bigger cut.

Should the hose force the bag in with it into the silcone connector?

What appears to happen is when the vacuum is applied wrinkles form around hose area & cause the leak.

Any help would be much appreciated on what appears to be quite simple.

Thanks in advance
Marcus
By fgayford - 6/27/2012 3:13:40 AM

Hello Marcus

What I do is put  the tube in the connector and then wrap the tape around the joint. I then make the hole in the bag and then slip the tube through from the inside of the bag pulling the tube out untill the tape contacts the inside of the bag. I press the bag down to get a good seal. I then put a roll of tacky tape around the tube where it exits the bag from the outside and push that down also. So in other words you have tacky tape on the inside and outside where the tube exits the bag. Works for me. I always had leaks too when I did it the way you did.

Hope this helps.

Fred 

shalco (25/06/2012)
Hi

I'm very new to all this so please be gentle!

I tried my first infusion mould at the weekend. After perserverence I seem to be struggling with leaks around the hose - bag seals.

However, what looks very simple in the online videos...ie putting the hose through the bag & into the silcone connector is always causing me leaks. I've tried tiny knicks in the bag to a bigger cut.

Should the hose force the bag in with it into the silcone connector?

What appears to happen is when the vacuum is applied wrinkles form around hose area & cause the leak.

Any help would be much appreciated on what appears to be quite simple.

Thanks in advance
Marcus