TPT July 2017

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T E CHNOLOG Y
34 JULY 2017
Follow-up order for complete system for
production of multi-layered PE-RT pipes
ENETEC Plastics GmbH, Germany, has
invested in its third complete extrusion
line for manufacturing five-layered PE-
RT pipes for heat exchanger systems.
The company, which was founded in
2014, chose solutions fromKraussMaffei
Berstorff. Two identical systems have
already been producing heating pipe
systems with a diameter between 8 and
32mm for several years. The recently
ordered system will be commissioned
by the end of this year.
“It was especially important to me to
have a partner offering an integrative,
customised concept, so to speak, a turn-
key system enabling us to manufacture
more than just me-too products,”
said Enetec’s managing
director, Michael Frenzel,
explaining his decision in favour
of KraussMaffei Berstorff. The
mechanical engineering com-
pany was able to fulfil the
requirements in such a way that
the pipe manufacturer ordered
its second line just nine months
after the initial installation, and
now has ordered its third.
The highlight of the systems is
the KM5L-RKW01-40 five-layer
pipe head, which KraussMaffei
Berstorff says is unique within
the industry. Andreas Kessler,
KraussMaffei Berstorff’s gen-
eral sales manager at its
Munich location, commented,
“We have succeeded in
designing a pipe head that
combines multiple spiral
distributor principles. Using the
pipe head, manufacturing multi-
layered pipes with perfect layer
thickness distribution becomes
possible at high line speeds.”
The inner layer is led over an
axial spiral, while the layers of EVOH
bonding material are distributed over
three spiral distributors, and a conical
spiral has been selected for the outer
layer.
The main advantage of this design is
the exact distribution of the layers, which
allows for a reduction of the material
costs in pipe production.
The pipe head is fed by six single-
screw extruders, each of which is
equipped with its own gravimetric
material metering so that different layer
thicknesses can be configured. In detail,
the extruders are the KME 45-36 B/R
main extruder for the PE-RT inner layer
and the KME 30-30 B coextruder for the
PE-RT outer layer.
Two further coextruders of the KME
30-25 D/C type each plasticise the
raw material for the layers of bonding
material, into which the EVOH oxygen
barrier layer is embedded. For these, a
KME 30-25 is installed as a piggyback
on the main extruder. The sixth extruder,
a KME 20-25 D/C, also installed as a
piggyback solution on top of one of the
coextruders, takes over appliance of the
strips.
KraussMaffei Technologies
GmbH – Germany
Website:
Enetec Plastics GmbH – Germany
Email:
Website:
KraussMaffei Berstorff multi-layer extrusion system
for production of five-layered PE-RT pipes at Enetec’s
production plant
High-end tube cutting series extended
DUTCH saw blade manufacturer
Kinkelder has extended its range of
TCT Champion saw blades for high-
performance tube cutting. Applying
a new carbide grade, PVD coating,
body design and tooth geometry, the
Champion TL saw blade series contains
the company’s latest innovations for
TCT tube cutting.
Over the past few years, the number
of heavy-duty tube cutting applications
has increased. Following performance
feedback from the market and the
demand for a new high-end TCT saw
blade, the Champion series has been
extended with two new blade types.
The Champion TL saw blade has been
designed to cut tubes with tensile
strength up to 850N/mm2 on high output/
high quality stationary sawing machines.
Due to a new carbide grade, a new PVD
coating to obtain a very smooth surface
finish, and a new tooth geometry and
body design for better chip evacuation,
this Champion saw blade has an
improved blade life of typically 50 per
cent and more compared to CX 3.
A dedicated Champion TL Multi saw
blade has been developed for multiple
tube cutting with a tensile strength of
400 to 800N/mm2. This blade type is
specifically suited for Rattunde Twin
machines, but also for other applications
where multiple tubes are cut, such
as Bewo, RSA and Sinico machines.
Kinkelder’s cutting experts can advise
on the parameters for the application.
Kinkelder Champion TL saw blades
are available in diameters from 225 to
560mm with a pitch of 9mm, 11mm and
13mm.
Kinkelder BV – Netherlands
Email:
Website: