Building a CF Tube

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Aquaman33
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Re: Building a CF Tube

Postby Aquaman33 » Tue Jul 23, 2019 2:22 pm


joeman
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Re: Building a CF Tube

Postby joeman » Wed Jul 24, 2019 4:22 pm

That is a lot of gladbake. :lol:

I'm going to give TR-104 MOLD release a go.

https://www.kirkside.com.au/wp-content/ ... -Wax-r.pdf

I'll wind a small 500mm section, something good enough for a payload tube...and see how it fairs.

Cheers

Joe
L1 - Callisto (H133) - 11-Jan-2016
L2 - March Fly (1633K940) - 18-Mar-2018 - RSO

joeman
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Joined: Fri Mar 06, 2015 9:05 am

Re: Building a CF Tube

Postby joeman » Fri Jul 26, 2019 12:05 pm

Hello,
I've put a lot more thought into this.

Firstly, if I could get cardboard tubes easily and cheaply, I'd probably use that. But I can't.
I like Aluminum tubes because I can if necessary (potentially) use dry-ice, is readily available local product and It is fairly forgiving(strong).

Kirkside have recommended using TR 108 mold release , possibly in combination with PVA Mold release agent.
Going to go for both...I want to give myself the BEST chance of it coming off. I suspect it will work without having to resort to dry ice which will be a great thing, because it takes up more time and isn't cheap. Yes, it will mean more Mandrel preparation, but, that is just what is required.

In my investigations, I think one of my BIG mistakes was letting the heat-gun keep the winding warm for about 4 hours post wind. This really sped up the curing and resulted in even tighter fit, sooner. Next tube I will ONLY heat for about 10 mins max, to extract excess Epoxy. After all, most of the excess epoxy removal occurs in the first 10 minutes when it still has the consistency of honey.

Hope to do a small 500mm test in 1 or 2 weeks time.

Will let you know how I go!!

Hopefully then I'll be closer to my next rocket Build!

Thanks to everyone with thoughts and support.

Cheers

Joe
L1 - Callisto (H133) - 11-Jan-2016
L2 - March Fly (1633K940) - 18-Mar-2018 - RSO

joeman
Rocket Crew
Rocket Crew
Posts: 378
Joined: Fri Mar 06, 2015 9:05 am

Re: Building a CF Tube

Postby joeman » Fri Aug 16, 2019 9:49 pm

Things happen slowly, but they do happen.

I've got some TR-108 "wax" to apply to the Mandrel and I'm likely to try and use some Graphite as a lubricant.
So
- Aluminum Tube - sanded to 2000 grit - then Brasso - then cleaned with Metho and paper towels.
- Then 8 layers of TR-108 - ~1hr between each application.
- Then dusted with Graphite
- Then Cash Register Tape
- Then Packaging tape

.... and then I can do the actual winding!

Yes, a lot of things to do. Hopefully it pays off.

Hopefully in the next few days I'll have a 500mm long tube ...removed WITHOUT dry-ice...

Will let you all know.

Cheers

Joe
L1 - Callisto (H133) - 11-Jan-2016
L2 - March Fly (1633K940) - 18-Mar-2018 - RSO


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