Paper Technology Journal 17 - Voith

This dispenser comprises a feeding system
with integrated gluer/cutter and four
wrapping paper rolls. It enables roll wrapping
in a single operation including end
fold-over and gluing. Only with respect
to the stationary dispenser, the Huatai
PM 10 roll wrapping machine layout differs
from the automated Twister 2-Line
installations at e.g. Steinbeis-Temming
and SCA Laakirchen, and soon at Leipa.
This is clearly shown in the 3-D layout in
Figs. 2 and 3.
At Huatai the automated handling system
components are identical to the robots so
far used in all Twisters for handling the
inner and outer header disks and labels.
Two robots in the Huatai wrapping line
Finishing
take inner disks from their respective
stacks. Then one robot places the disk on
the left face of the roll and the other on
the right face. Despite the fast operating
cycle, this always ensures enough time
for cleanly lifting the header disks off the
stacks (Fig. 4).
The double gripper of the robots for the
outer header disks has a special adjusting
mechanism to fit the different diameters
and reliably separate the disks,
which are usually serrated. An additional
advantage of this gripper design is that
even the largest disks are supported over
their entire surface area on the header
press, thus making bent edges a thing of
the past (Fig. 5).
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Fig. 1: Wrapping paper dispenser.
Fig. 2: 3-D layout graphic of Huatai.
Fig. 3: 3-D layout graphic of Twister 2-Line.
Fig. 4: Inner header disk robot.
Fig. 5: Outer header disk robot.
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These 6-axis industrial robots are mounted
on a traverse, which gives them seven
axes of motion. As a result, the disk
stack can be lined up in front of the robots
instead of around them in a semicircle.
Not only does this look better; but
above all it greatly simplifies the delivery
of new disk stacks.
The robots operate as completely autonomous
units, thus guaranteeing high
reliability of the roll wrapping line. They
fit the header disks and labels with the
greatest precision – roll by roll – to ensure
perfect wrapping.
Another interesting feature of these Voith
wrapping machines is the cross-line roll
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