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kronezz
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Join Date: Aug 2009
Posts: 12

Slippery Coating to Cover Section of a Tube.

06/10/2011 12:27 PM

I have a printing press.

One of the parts is a turn bar assembly used to flip the paper over in the web.

It consisted of a few rollers and a pair of tubes that the paper glilde over.

The tubes have holes drilled up one side with an air supply to create a cushion of air to provide less resistance.

The tube is also wrapped with a teflon tap.

I think I would like to replace this tape with some sort of coating on the part itself,

or maybe a treatment to make the tubes have less friction.

Thank you.
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SimpleMind
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#1

Re: Slippery Coating to Cover Section of a Tube.

06/10/2011 1:54 PM

I don't think you'll find a material with friction close to air cushion if well designed and air flow is proper. Also air could be there to help with ink drying and paper cooling, teflon for it's anti-contamination properties etc. So this can be considered heavy modification and more app specifics must be studied. S.M.

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WJMFIRE
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Location: USA, Florida
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#2

Re: Slippery Coating to Cover Section of a Tube.

06/10/2011 3:19 PM

Consider plating the member with industrial chrome. It has a fairly low coefficient of sliding friction and wears quite well.

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TonyS
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#4
In reply to #2

Re: Slippery Coating to Cover Section of a Tube.

06/11/2011 6:52 AM

Chrome coating with air blow is what we used in printing poly. Worked very well.

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pantaz
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Join Date: Feb 2008
Location: Van Nuys, CA
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#3

Re: Slippery Coating to Cover Section of a Tube.

06/10/2011 8:20 PM

I'm guessing you want something that lasts longer than the Teflon tape. Paper can be surprisingly abrasive.

Are you talking about one machine, or several? There are myriad low-friction coatings available, with a wide range of abrasion resistance. Your budget (both time & cost) will likely eliminate many of them.
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kronezz
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Join Date: Aug 2009
Posts: 12
#5
In reply to #3

Re: Slippery Coating to Cover Section of a Tube.

06/13/2011 8:42 AM

Well I am looking at 1 press now.

Thank you.
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Nigh
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#6

Re: Slippery Coating to Cover Section of a Tube.

06/13/2011 8:58 AM

I've used a coating in the past called Nifluor, I think it may have some other trade names. This is a nickel electroplated finish with entrapped PTFE so you get the wear resistance of the nickel with low friction of the PTFE.

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