Improve turn-up efficiency with
the Paprima Reel-JeT™
It is common practice to make the web transfer at
the reel from a wound spool to a fresh spool by cutting an edge
tail with a wet-end tail cutter, flipping the tail up on to the
new spool with glue, and then widening the tail to full sheet
width with the traversing tail cutter.
There are two main problems with this turn-up method.
First, the tail is
normally flipped
up by applying glue
manually to the spool. This procedure is both dangerous to the
operator and inefficient because the process relies on the glue
to rip up a wide tail. Second, the wet-end tail cutter then enlarges
the tail to full sheet width at slow speed. This slow enlargement
builds a log on the spool with a tapered profile as the successive
wraps spiral from the tending side of the machine to the backside.
This 'carrot' profile results in hundreds or even thousands of
metres of wasted product at the converting operation.
The Paprima Reel-Jets™ is a completely
automated, high-speed,
dual cutting, water-jet
tail cutter. It is positioned above the sheet just ahead of the
reel and cuts a narrow tail using two water jets of about 1000-bar.
The cuts are made on the reel drum surface at the
sheet centre as close to the spool nip as possible and can be
either intersecting to make a free tail tip or parallel cut, depending
on sheet weight. The tail is then transferred to the spool with
a small amount of watersoluble glue that is sprayed directly on
to the tail. Only about 10 ml of glue and 10 ml of high-pressure
water are needed to make the turn-up, which takes about one second
to complete. It is fast, simple, extremely clean and efficient.
More than 60 Reel-Jets™ have
been installed worldwide with many of the most recent ones applied
on tissue grades. The reasons for this are simple:
- 0.5%-1+% production increase is common on tissue/towel
- 99% turn-up efficiency is achieved from the lightest
tissues to the
heaviest towels
- Symmetrical parent roll starts - no 'carrot' profiles
- Spool bottom waste is reduced to less than 100 m
- Extremely low glue consumption and cost
- about €0.10/turn-up
- Extremely low maintenance cost - about €10,000/yr
- Project cost is typically less than €350,000
- Paybacks are typically a few months and often as
short as several
weeks
In summary, the Paprima Reel-Jet™water-jet
reel turn-up system has proven itself to be a versatile performer,
consistently increasing turn-up efficiency and reducing bottom
waste to levels generating fast project paybacks.
All the major tissue producers have operating Reel-Jets™. TW
