Got
Foam?
Dear
friends,
So
you have decided to go out and purchase a brand new metal removal fluid for
your shop, and after filling your machine you’re expectations are high! Good
cutting performance, machine cleanliness and bio-stability are all promised by
the metalworking fluid manufacturer. So you go to fire up the machine and
decide try out that new high pressure pump you just paid a bundle for, and
presto! Foam all over the shop floor!
Great… Now what do I do? Well there are a few things you can do; first you
might try adding anti-foam additives to help control the foam. You can try
making up your coolant with hard water if you are lucky or unlucky enough to
have it available. You might even consider reducing the pressure on that nifty
new high pressure coolant system; but that tends to negate the whole purpose of
having high pressure coolant doesn’t it? So what is causing the problem? Why do
coolants foam? Well there are numerous reasons that can lead to metalworking
fluids foaming.
1.
Air
entrained into the fluid can cause the coolant pumps to cavitate and create additional
foam, which leads to even more foam the longer the coolant pumps runs.
2.
Higher
coolant pressures (1000psi plus), pushing fluid through small tool orifices
with high RPM spindles can entrain air into the fluid (High pressure/low
volume).
3.
Inadequate
sump volume and/or poor sump design can lead to foam build up.
4.
High
cutting fluid turn over, with inadequate dwell/rest time for the fluid to
release entrained air.
5.
High
fluid temperature; the more the fluids temperature increases so does its
potential to foam.
6.
Excessive
coolant concentration; running the coolant concentration higher than the
manufacturer recommends.
So
as you can see there are many potential causes for foam build up. The big
question is - what can you do about it? Other than adding anti-foam additions
to the sump which can be very costly; the best solution is to refer to your
metalworking fluid manufacturer and purchase a coolant which is designed for
high pressure coolant systems. So… got foam? Give your coolant representative a
call and get the right fluid for the job.
Stay
tuned for more useful coolant tips, from The Coolant Guy!
Best
regards,
Brett Reynolds, “The Coolant Guy” works for Blaser Swisslube Inc.
If you would like more useful information regarding metalworking fluids, or would like to find out more information about Blaser metalworking fluid products,
Please contact Brett at 801-722-4095 or via
theoilbaronbulletin@blogspot.com
The Oil Baron Bulletin is not affiliated with Blaser Swisslube Inc. or its subsidiaries