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how to fill high viscoity liquid in small gap

how to fill high viscoity liquid in small gap

how to fill high viscoity liquid in small gap

(OP)
Hi all,

i got another problom here,

how can you fill a liquid( viscotiy is about 7000 cps) into a 0.2mm gap?

Thanks in advance.

 

RE: how to fill high viscoity liquid in small gap

Can you heat it and achieve lower viscosity?

Perhaps vacuum to draw the liquid in?

RE: how to fill high viscoity liquid in small gap

(OP)
Thanks to the reply TheTick,
the liquid will gets more viscosious when heated, it some kind of retainer compound. and vacuum is not feasibale.

for that viscocity 7000cps, will it flow though a needle?

RE: how to fill high viscoity liquid in small gap

Put a flat plate across the gap.  Add dead weight to the plate.  Inject the liquid into the gap under pressure below the plate.  Remove the plate. Clean up.

Injection pressure should be no more than 1/2 the contact pressure of the dead weight.  Might require a little trial and error.

RE: how to fill high viscoity liquid in small gap

ps...you'll need a gasket between the plate and whatever it is sitting on, and on both sides of gap

RE: how to fill high viscoity liquid in small gap

Put a thread or thin wire into the gap and let the liquid wick into the gap.

RE: how to fill high viscoity liquid in small gap

What's it's rheology like?  Newtonian?  Non-Newtonian?  Shear thinning?  Shear thickening?

Good luck,
Latexman

RE: how to fill high viscoity liquid in small gap

Just for those like me, 7000 cps is about as viscous as molasses. Maybe you could smooth it into the gap with a teaspoon!

 

Cheers

Greg Locock

SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.

RE: how to fill high viscoity liquid in small gap

Put a zerk fitting on it and shoot it in with a grease gun :)
B.E.

RE: how to fill high viscoity liquid in small gap

in motors we used vacuum and preassuer cycles to fill gaps

"In this house, we obey the laws of thermodynamics." Homer Simpson

RE: how to fill high viscoity liquid in small gap

Spoon,
Depending how big this assembly is and how many you need to treat you might combine Ron's idea of sandwiching the parts with Berkshire's by adding the zerk to one of the plates.  There is a bearing packer that uses this method to squeeze grease into bearings.

Griffy

RE: how to fill high viscoity liquid in small gap

Is the gap between flat surfaces?  Put a measured quantity of liquid on one surface, then assemble the parts.  The liquid will spread throughout the assembled clearance.  Calculate the volume of the clearance to determine the quantity of liquid to apply.
Is the gap between two cylinders?  Cap both cylinders.  Put a measured quantity of liquid in the bottom of the outer cylinder and push the inner cylinder into place.  Force the liquid into the gap between them.

Ted

RE: how to fill high viscoity liquid in small gap

Or is the situation more akin to grouting a bathroom tile, in which an aesthetically smooth surface may hide a void?

Cheers

Greg Locock

SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.

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