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Chaz
20-06-2017, 11:11 AM
Ive had mixed results trying to build something to do misting or similar. So reading some threads, I'm going to try dry cutting alu with a good blast of air to clear the chips.

Can anyone recommend a suitable set of pipes / nozzles that I can use to do this? Ive seen the coolant nozzles being used but the air orifice needs to be smaller. Ive seen some brass ended ones that have eg 1mm hole. Anything that I can look at for Thor please?

Desertboy
21-06-2017, 08:43 AM
Ive had mixed results trying to build something to do misting or similar. So reading some threads, I'm going to try dry cutting alu with a good blast of air to clear the chips.

Can anyone recommend a suitable set of pipes / nozzles that I can use to do this? Ive seen the coolant nozzles being used but the air orifice needs to be smaller. Ive seen some brass ended ones that have eg 1mm hole. Anything that I can look at for Thor please?

I thought these looked good
http://www.exair.com/en-US/Primary%20Navigation/Products/Air%20Nozzles/Blowoff%20Systems/Pages/Blowoff%20Systems.aspx

And they do have an UK distributor.

I was going to hook up to a solenoid as well so I could pulse the air (555 timer circuit, many on ebay and alixpress cheap as chips so not worth reinventing the wheel) not sure if pulsing the air is good or bad but seen other people doing it have the solenoid.

Chaz
21-06-2017, 08:45 AM
I thought these looked good
http://www.exair.com/en-US/Primary%20Navigation/Products/Air%20Nozzles/Blowoff%20Systems/Pages/Blowoff%20Systems.aspx

And they do have an UK distributor.

I was going to hook up to a solenoid as well so I could pulse the air (555 timer circuit, many on ebay and alixpress cheap as chips so not worth reinventing the wheel) not sure if pulsing the air is good or bad but seen other people doing it have the solenoid.

Thanks, seen their stuff before.

m_c
22-06-2017, 12:19 AM
How about mig welding nozzles?
Most common sizes just use a M6 thread. Suitable hose, adapter (just a hosetail with female M6 for screwing in the tip), and some method of securing the hose (similar type of arm as used on DTI gauges?).
That way you can try different sizes (0.6, 0.8, 1.0mm are all common sizes), and you can try modifying them to suit without any major outlay.

Other option could be syringe nozzles (I know they're available in a very wide range of sizes for applying solder paste), but making an adapter would be a bit more challenging, as they normally use a 1/4turn type moulded fitting.

njhussey
22-06-2017, 10:41 AM
I have one of the cheap spray mist systems you get on ebay here (http://www.ebay.co.uk/itm/Mist-Coolant-Lubrication-Spray-System-for-8mm-Pipe-CNC-Lathe-Mill-Drill-Machine-/152029419121?epid=1694601720&hash=item2365a8d671:g:5tEAAOSwwpdW9iPS) and it works really well for ali on my router, I use the air only when cutting Acetal to help clear the chips...

Desertboy
22-06-2017, 02:18 PM
I have one of the cheap spray mist systems you get on ebay here (http://www.ebay.co.uk/itm/Mist-Coolant-Lubrication-Spray-System-for-8mm-Pipe-CNC-Lathe-Mill-Drill-Machine-/152029419121?epid=1694601720&hash=item2365a8d671:g:5tEAAOSwwpdW9iPS) and it works really well for ali on my router, I use the air only when cutting Acetal to help clear the chips...

That looks spot on what I want how do you hook it up?

Drop the pipe with the non return valve in the cutting oil and the other end to compressed air fitting?

njhussey
22-06-2017, 02:20 PM
That looks spot on what I want how do you hook it up?

Drop the pipe with the non return valve in the cutting oil and the other end to compressed air fitting?
Yep spot on!

Sent from my HUAWEI VNS-L31 using Tapatalk

Chaz
22-06-2017, 04:59 PM
I have one of the cheap spray mist systems you get on ebay here (http://www.ebay.co.uk/itm/Mist-Coolant-Lubrication-Spray-System-for-8mm-Pipe-CNC-Lathe-Mill-Drill-Machine-/152029419121?epid=1694601720&hash=item2365a8d671:g:5tEAAOSwwpdW9iPS) and it works really well for ali on my router, I use the air only when cutting Acetal to help clear the chips...

I had one with mixed results. This one looks better built however, might give it a try.

Boyan Silyavski
22-06-2017, 09:47 PM
3d printer nozzle. It is M6 threaded??. I have said it before, the mist system works best with 0.6mm- 0.8mm nozzle.

Chas, i believe you have seen the video where i go into the details?? last news is that kerosene works fine for all and will not hack the transparent vessel/ if you buy a brand one/.

At the end of the day i used 1mm tube that i pushed and orifice closed, then re drilled to size at the exit only. The other trick is the hole to be 0.8mm but the exit to be cut flat and slightly chamfered at the outer side but not the hole. If that makes sense. That produces the nicest spray pattern


https://www.youtube.com/watch?v=NVu4mCFCvmA

Chaz
23-06-2017, 10:19 AM
3d printer nozzle. It is M6 threaded??. I have said it before, the mist system works best with 0.6mm- 0.8mm nozzle.

Chas, i believe you have seen the video where i go into the details?? last news is that kerosene works fine for all and will not hack the transparent vessel/ if you buy a brand one/.

At the end of the day i used 1mm tube that i pushed and orifice closed, then re drilled to size at the exit only. The other trick is the hole to be 0.8mm but the exit to be cut flat and slightly chamfered at the outer side but not the hole. If that makes sense. That produces the nicest spray pattern


https://www.youtube.com/watch?v=NVu4mCFCvmA

I did make a system like yours however I dont think it works well for me. I need to rebuild it and see if I can tweak.

Boyan Silyavski
23-06-2017, 02:16 PM
I did make a system like yours however I dont think it works well for me. I need to rebuild it and see if I can tweak.

Whats not working right? Even if the nozzle doe not spit liquid, only air, it should work well. I have tested up to 1" bit on steel and works right /not on that machine/.

Chaz
23-06-2017, 02:58 PM
Whats not working right? Even if the nozzle doe not spit liquid, only air, it should work well. I have tested up to 1" bit on steel and works right /not on that machine/.

The amount of 'mix' was variable, found it difficult to get it mist nicely and not use too much of the coolant (I had taken some of my water soluable mixed coolant and used that as the 'lubricator'. Ill try it again once I have Thor up and running.

Boyan Silyavski
23-06-2017, 03:47 PM
Thats the valve problem it seems to me . It must be Needle valve.