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Old 02-28-2015, 05:03 AM   #1
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Default Epoxy coat 300 microns

Hi,
I am using a Graco ultra max 695 machine to paint black epoxy paint on iron castings. I need 300 microns total paint coat. Is it possible with single coat ?? Also I am facing problem with nozzle getting jammed and uneven flow of paint. And loss of pressure in the machine.
Thanks.
gaurav
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Old 02-28-2015, 07:21 AM   #2
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Quote:
Originally Posted by gaurav219 View Post
Hi,
I am using a Graco ultra max 695 machine to paint black epoxy paint on iron castings. I need 300 microns total paint coat.

Is it possible with single coat ??
300 microns is possible depending on the product that you are using. follow the data sheets, some will recommend multiple coats or a tack coat to build on.
Also I am facing problem with nozzle getting jammed and uneven flow of paint.
you may need a larger tip size or it could be possible that your pump can't handle the material but I would think that a 695 should be ok in most cases. if thinning is allowed, this could take some of the load off of your pump but it may also affect your attempts to build 300 microns with a single coat.

And loss of pressure in the machine.
Thanks.
gaurav
some product info would be helpful too.
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Old 02-28-2015, 09:09 AM   #3
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It's not rocket science. Trial and error. Put it on till it runs off. And that is as heavy as you can get. Go from there.
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Old 02-28-2015, 10:55 AM   #4
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A few things can go wrong with that approch besides the runs. Too many mils / microns can entrap solvents or cause blisters and you may also put more mils on than required or needed. Epoxy over an inorganic zinc may need a mist coat to gas off the zinc before building mils up.
Not enough info here to provide an accurate answer.
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