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Bonding Plastic and Metal

RohanC

RohanC

Member
Joined
15 Oct 2015
Messages
48
Anyone has any idea on how to bond together plastic and brass metal? Would epoxy or Araldite do it?

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Thanks for the info Greenfinger2 🙂

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SIlicone should do as well.. 🙂 If you look for example at double glass windows.. That's an aloy frame with 2 sheets of glass glewed air tight to it. If it works with glass to metal, why not plastic? If you look at the bison glass kit data sheet, it coveres about all, glass. wood, metal, plastic etc.. 🙂
 
The silicone used for tanks would be safe?

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Ian made a very good point there with the brass, it could react to the acid in silicone. The regular aquarium safe silicone is based on vinigar acid..
It should be cured in 24 - 48 hours, i have no idea if brass will react that fast and if the acid in th esilicone stays present after curing. In bathroom there is lots of brass and cupper.. Till now havent sen it getting green with silicone on it, but thats a different kit.. 🙂
 
Will give a try with both silicon and epoxy. Here's the pic of the thing where i intend to use ituploadfromtaptalk1448132737777.jpg

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Whats at the other end? Thread? And those connectors also come in different kinds of plastic. Does it need to be air/water tight? Note epoxy gets rock hard, if the brass connector ever moves the epoxy probably will break and leak... 🙂

Ok i see, these come in plastic too.. 🙂
 
Its basically a cola cap. I have pierced it and put the brass connector. The idea is to use it for diy co2 which can hold pressure of about 10-30 psi

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Already got these. But it's cheap hard chinese plastic which breaks if a bit of force is applied to tighten it on the bottles. The cola caps are far better in terms of tenacity and durability. Already many of us had the cracking issue with these chinese ones.

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Ok, didn't know about the quality.. But if you want it pressure tight i think you need another construction than kit or epoxy..

Try these i do not know the english name for them
4019.jpg

4020.jpg

Drill a hole put a gasket (o-ring) in between and screw together.. They come also in plastic. The metal ones even down to Metric 5 mm thread. So if you got a 5mm tap, you can tap thread in the botlle cap and only need one connecter, the outside thread one. 🙂
 
Would two of these fit in a single cap? I need two connectors per cap just like the bangood version.

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Ive used these, with o-ring and M5 thread 4x6mm hose connector.. 🙂

130101_6.jpg

Got it..
B&N Type M-5H-6 pneumatic air Fitting, M5 thread straight hose nipple, for 6mm tube
 
Hi Rohan, If you are going to use this on Diy Co2 set up ?? You only need to drill a hole slightly smaller than the tubing in the top. Cut the tubing to a v shape at the end then pull it through the hole and a tight fit no leaks 😉 Glue does not work well on polypropene plastics.

I ran my system for 2 years no problem😉 Every 4--6 months or so as Co2 is a corrosive gas I change the top and tubing.
 
zozo said:
Ive used these, with o-ring and M5 thread 4x6mm hose connector.. 🙂

130101_6.jpg

Got it..
B&N Type M-5H-6 pneumatic air Fitting, M5 thread straight hose nipple, for 6mm tube
Click to expand...
My only doubt. Would two of these fit in a single cap? Could you pls show a pic of your cap if possible 🙂

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Greenfinger2 said:
Hi Rohan, If you are going to use this on Diy Co2 set up ?? You only need to drill a hole slightly smaller than the tubing in the top. Cut the tubing to a v shape at the end then pull it through the hole and a tight fit no leaks 😉 Glue does not work well on polypropene plastics.

I ran my system for 2 years no problem😉 Every 4--6 months or so as Co2 is a corrosive gas I change the top and tubing.
Click to expand...
So without any additional gluing it won't leak? That's definitely a boost 😀 will try.

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Roy did diy co2 for years, and see his journals for the results.. Than you'll :crazy: kwijl.gif :woot: :nailbiting: :clap: No words needed.. It all comes down to knowing what you're doing and the UKAPS magic word "Husbandry".. 🙂

I never did, went straight on with a presurized fe. So i also never did use these connectors to fit bottle caps i used them for other construction ideas to take little pressure without leaking water or air. But i'll see if i still got 2 left and see if i can make 'm fit a bottle cap. I think they can.. 🙂 Now i'm curious as well.. 🙂
 
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