Author Topic: No-Fog Cooler  (Read 123 times)

Online Joco

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No-Fog Cooler
« on: February 11, 2019, 09:46:49 AM »
Been working on a no-fog cooler. Its based off a number of plans generally available out there so no claim on originality.  Also referenced the patent at https://patents.google.com/patent/US5390854 for some more clarity on how it is supposed to work, pressures and some key measurements.

Still testing and the like but it seems to be working without atomising from what I can tell. Like I said, more testing to do.  Once I have proven it some more I'll post plans with final dimensions along with some description of the key elements of the build.

This video is using a standard soluble oil solution of 1:35 ratio. The thinner the coolant solution the better it will operate. I suspect a proper light weight coolant like koolmist and good old wd40 (for aluminium work) will be easier to dial in than this mixture.


Cheers,
James.
James
Wellington - NZ

Online Joco

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Re: No-Fog Cooler
« Reply #1 on: Today at 04:27:37 AM »
I have been building a QCTP holder for a DI today using the Dah Lih mill and the new no-fog cooler. Conclusion is the cooler is working as designed. Getting good cooling effects with low coolant use. It worked very well with the HSS 25mm roughing endmill, the 10mm finishing end mill and the 60 deg dovetail cutter. At the end of cutting the steel block was quite cold to the touch. No warming at all, if anything is was noticeably colder than when I first placed it in the vice.

So here are the plans I have made up to reflect what was built. Some observations to help ...
- The M5 holes are for the quick push fit air fittings I got off Aliexpress. These could obviously be changed for whatever suitable air fitting and hole/thread size you had or wanted to use.

- The materials I used were:
Mix block = 6061 aluminium. This could just as easily be brass if you wanted to.
Tube, nozzle and M6 adaptor = brass

- The brass parts were secured to the tube using loctite or equivalent adhesive.
- The brass M6 adaptor was sealed into the mixer block using plumbers thread tape.

Cheers,
James.
James
Wellington - NZ

Online Joco

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Operating pressures
« Reply #2 on: Today at 04:40:07 AM »
For operating pressures after some tinkering I am using 20psi on both the fluid tank and the air feed.

I'm currently using normal old soluble oil in a 1:35 mix per its instructions. In time I will try and source some proper MQL coolant for this device.  I have found a local supplier who seem to stock a vegetable oil based coolant design for MQL use in mist coolers.  its not very cheap by 5 litre should last a pretty long time.

Cheers,
J.
James
Wellington - NZ