Plastics News - Show Daily - October 20, 2023 - 16

16 * Plastics News, October 20, 2023
FAKUMA SHOW DAILY
Hellweg
Maschinenbau's
new wet-forced
granulator
for recycling
fi lm shown at
Fakuma 2023.
Plastics News photos
by Caroline Seidel
A 3D printed model of the
new wet-forced granulator
for recycling fi lm from
Hellweg Maschinenbau.
Hellweg defi es odds, sees
major sales increase
HELLWEG
MASCHINENBAU
Hall A1, Booth 1005
By Beatriz Santos
Sustainable Plastics
This year has been tough for
a lot of plastic recyclers. Recycled
resin prices have been under
severe downward pressure
for months because of persistent
weak demand, competition from
the falling cost of virgin plastics
and cheaper imports from Asia.
On the show fl oor at Fakuma,
there are some reports of double-digit
percentage drops in sales
for recycling machinery. But there
are also surprisingly positive reports,
with some companies saying
they have not seen a drop in
sales or have, even, experienced
increased sales.
Chief among them is perhaps
Hellweg Maschinenbau, whose
managing director, Mark Hellweg,
gleefully said the company will
have increased its output by 30
to 50 percent by the end of 2023
after already boosting sales by 50
percent in 2022.
" The fi rst day at Fakuma was
really good, " Hellweg said. " We
had conversations throughout
the entire day. For me, it was a
very good day, like a very good
Fakuma. So, I don't see any negative
impact right now. I don't
see it, and I don't feel it. People
were a little bit nervous during
the last month. I have also seen
that in our customers. But yesterday
I had no chance to feel
it here. Optimism what all I was
met with yesterday. "
At the core of Hellweg's success
is the new MDSGi 1500/600 wet
grinder, which it is unveiling and
starting to sell at Fakuma. The
machine has been under development
for the past three years after
Repetco contacted Hellweg and
was " absolutely impressed " with
the results of the grinding tests,
Hellweg said.
The Spain-based new entrant to
the recycling of PET/polyethylene
multilayer packaging ordered
four prototypes that have been
in operation 24/7 since the beginning
of the year. Even though Hellweg
only just started commercialization
at Fakuma, it already
received six orders for the rest
of the year, and another eight are
booked for 2024.
The new wet grinder uses
low-power motors rated from 45
kW to 110 kW, which enable previously
unattained low power
consumption of just 70 kWh to
90 kWh, a huge advantage during
the current high electricity price
market. Forced feed of PET, polyethylene,
polypropylene, polystyrene,
PVC, polycarbonate,
polylactic acid or PE fi lms using a
tamping screw ensures long-term,
trouble-free operation even with
contaminated input materials,
achieving a throughput of up to 5
tonnes of fi lm per hour.
The MDSG 1500/600 W model
is the fi rst to be commercially
available, with MDSG 600/600 W
and MDSG 600/300 W versions
to follow. The fi rst number in the
model's name denotes the working
width of 600 mm or 1500 mm,
while the second number refers
to the diameter of the rotors,
Mark Hellweg of
Hellweg Maschinenbau
says his recycling
machinery company
has increased its sales
while other fi rms saw
drops in demand.
tends blade life. After a few hours
of dry cutting, the blades in a
typical cutting chamber get hot
enough to melt plastic and contaminants
together, which makes
subsequent cleaning much more
diffi cult. Processing with water
keeps the cutting chamber cooler,
and the friction in the cutting
chamber combines with the water
to double as an intense washing
process.
" Normally you have to change
the blades after one or two days of
grinding. But with our technique,
blades last a minimum of fi ve
days, " he said. " When you put all
these values together [low power
consumption, high throughput,
higher-quality fl ake, higher blade
life], the machine has a high value
for the customer. "
Another value point is the
300 mm or 600 mm.
Depending on the model, the
grinders are fi tted with fi ve or
seven rotary blades plus two or
three static blades. These blades
use Hellweg's double scissor-cut
technology, in use in its machines
for the past 25 years. These are
key to the success of the new
grinder, setting a benchmark in
terms of cut quality and dust-free
operation. They ensure a constant
cutting gap and require no
adjustment of the rotary blades.
" What sets us apart is the quality
of our fl ake, " said Hellweg.
" Often the problem is that the
machine isn't really cutting the
regrind; it is more or less breaking
it. Then you get a torsion in the
fl ake, or you get too many fi nes,
so it's not really homogeneous
and it requires further steps afterward.
The next steps with our
machines are mostly washing and
delaminating, for example. The
difference is that we use a very
sharp cutter, a double scissor
cut, " Hellweg explained.
As a result, the shredding
process consistently produces
optimum-quality fl akes with a
perfect particle size distribution
and geometry, according to the
company. The fl akes' sharp-edged
and, above all, fl at shape without
twists or folds make them ideal
for further processing, including
transport, washing and, if necessary,
delamination.
Cutting with water also contributes
to better results and exfl
exibility of the new machine. If
the operator so wishes, they can
reduce the speed of the rotor,
thereby reducing throughput
but achieving higher-quality results
while further extending the
life of the blades.
" This is quite new in the market, "
Hellweg said. " The capacity
of the granulator is so high that
you can also bring down the RPM
of the machine [the speed of rotation
of a machine expressed in
revolutions per minute], to lower
the throughput but get even better
results. So you can play with
the machine: You can push it or
you can lower it, according to
your needs, and so you are very
free to play with your cycles in
the recycling plant, " he said.

Plastics News - Show Daily - October 20, 2023

Table of Contents for the Digital Edition of Plastics News - Show Daily - October 20, 2023

Plastics News - Show Daily - October 20, 2023 - 1
Plastics News - Show Daily - October 20, 2023 - 2
Plastics News - Show Daily - October 20, 2023 - 3
Plastics News - Show Daily - October 20, 2023 - 4
Plastics News - Show Daily - October 20, 2023 - 5
Plastics News - Show Daily - October 20, 2023 - 6
Plastics News - Show Daily - October 20, 2023 - 7
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Plastics News - Show Daily - October 20, 2023 - 9
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Plastics News - Show Daily - October 20, 2023 - 16
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Plastics News - Show Daily - October 20, 2023 - 21
Plastics News - Show Daily - October 20, 2023 - 22
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Plastics News - Show Daily - October 20, 2023 - 24
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