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Nip Impressions® is Paperitalo Publications' flagship publication.  Published every Thursday afternoon (US Eastern Time), Nip Impressions® is eagerly read by pulp and paper professionals around the world.
1 Apr 15: Materials 10: Plastic ropes

Yes, I know modern paper machine ropes are plastic. 

Perhaps that is what causes them to burn off, particularly at transfers between sections.  I think the old natural ropes were far tougher.

So, perhaps the title this week is a misnomer. The real question is this: at the dryers at section breaks, should we be lining the rope groove on the dryer with teflon or some other materials so the ropes can slide, in the case of a stopped section (happens often) or sections running at different speeds (happens all the time)? 

It is clear the ropes at a transfer are not running at the speed of the dryers in the next section, hence there is friction, friction that eventually destroys the rope.  A teflon lining in the rope groove just may alleviate this problem.
 
What do you think?

We would like to hear from you. Please send an email to jthompson@taii.com 

with "LGMI Frontiers" in the subject line. 

  

Comment from last week:

 

Greetings!

 

A plastic template to align pumps and drives makes a good deal of sense to me.  It could certainly speed up the process of alignment.  Combine that with a "flexible" coupling and alignment could be accomplished in minutes, rather than hours.

 

I can see a couple of obstacles -

  1. Corrosion - especially of equipment bases and mounts - tends to distort the shape of the base.  Yes, corrosion should be addressed, cleaned up, corrected, equipment surfaces re-sealed, etc.  However, I go to plenty of mills where this would be considered a "luxury". 
  2. Almost every base is unique.  Even when machined to a specification, I find that we have to "fit" each base / drive.  Thus, an old template may not work - in some cases - when a base or component has been changed.  Sometimes, the building itself moves and changes the relationship of the equipment.  BUT - the templates would be easy to make and relatively inexpensive.

 

Again, sounds like a good idea.

 

Bill Adams

Sr. Technical Service Representative

ERCO Worldwide

 

 

 

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As always, your comments will be appreciated.
Think light!

 

Brian Brogdon, Ph.D.
Executive Director

 

or

 

Jim Thompson
Founder
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or Jim Thompson!
 

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LGMI Weekly Ideas are presented for your consideration and inspiration only.  It is solely your responsibility to check for engineering correctness, applicability, standards, insurance policy and local, national or any other legal compliance required before implementing.  Neither The Light Green Machine (TM) Institute, Paperitalo Publications, Talo Analytic International, Inc., nor any individual associated with these entities accepts any responsibility for your application or compliance issues.


 



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