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- เผยแพร่เมื่อ 17 พ.ย. 2024
- This is one of the printing presses at NWN changing the paper over.
The paper is being fed into the press at about 40mph and each roll contains many kilometres of paper, and they weigh more than 1/3-1/2 of a ton each.
The machine offers up the new roll and spins it up to speed, before doing a "blink and you miss it" swap (at 1:09-1:10) between the rolls still feeding the press with a continous supply of paper at 40mph!
Normally only 1 or 2 copies are wasted in the cross over, an amazing feat for machines that can print upto 70,000 copies per hour!
The clattering in the background is the folding machine situated just behind, each time it clicks thats another copy or 2 of the newspaper folded.
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Was a "demonstration" for us while we were having a tour of the facility.
The stub end was re-used later in the run.
how come it changed with the stub so big?
I watched at 0.25X speed and still could not tell what was happening.
It was a demonstration of how they swap out the rolls of paper without stopping the press.
This rollchange appears to be during makeready I guess running about 600fps almost ready to count the splice was manual appears they use a cheaper stock on MR like a 36lb coated job may require 45lb stock that why they change rolls part way the pressman told the rollman to make the splice they are ready to count. This rollstand appears to be a hybrid part MEG part BUTLER you can see the festoons going from run high to run low behind the roll at the splice.
The swap was purely a ‘demonstration’ for our benefit.
There aren't festoons, only a dancer. The movement you're seeing behind the roll is althe severer that positions for the splice.
The printing term for this is Splice.
And what is it called if the splice fails,?
You shout "WEB OUT"@@robertcaves3797
We would call a failed splice a miss. Cause fiber separation.
what make is this
james wilson not sure I'll see if I can find out for you.
To much waste
Wasn't wasted was reused later, was only changed as a demonstration for us
Don't know how I got to this video/comment but that isn't waste even in a production run. Most companies require you to splice out butt rolls around 25-30 inches so they can be used at start up of the next job with that paper. If not you get a situation where you either scrap small rolls or try to run them if the splicer can load them fast enough.
Has it ever break changing rolls of paper?