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The Textile Magazine
JUNE 2012
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97
conditions.
Uniform quality
For rotors, “RD” stands for “Rieter Diamond” and
refers to a patented RD coating which is offered for
rotors exclusively by Rieter (Fig.3). The system-
atic structure of the multi-layer diamond coating
produces different surface structures on the rotor
wall and in the rotor groove. This is not only
ideal for the spinning process; the intelligent
structure of the diamond layers guarantees at
least the same service life as a BD coating. The
RD coating also guarantees constant technological
values throughout its entire service life. The fields of
application of the new coating are the same as those
for BD coating. This innovative manufacturing process
enables the RD rotor to be offered at a lower price than
the BD rotor.
Spinning stability and yarn characteristics, which
are essentially defined by hairiness, can be extensively
influenced by selective design of the draw-off nozzle.
It is well known that making notches in the
nozzle funnel is an extremely effective means
of achieving this. Hairiness and spinning
stability depend on the number, size,
shape and position of the notches
and the co-ordination of these parameters
with the radius of the funnel and the grip
of the surface, i.e., the co-efficient of
friction with the yarn. The “nano6”
and “nano8” draw-off nozzles repre-
sent the ideal co-ordination of these
multi-dimensional parameters, aimed
at systematic further development for the
given application (Fig.4).
Further development to the “neXT Generation”
is rounded off by optimized materials application
and production technology. The materials appli-
cation technology used, with the resulting surface
structure, enables wear to be reduced and fiber damage
to be minimized on both draw-off nozzles at maximum
productivity. The production technology with minimal
tolerances guarantees reproducible, top-level quality.
w
Fig.4. Rieter neXT-Generation “nano6” and “nano8” nozzles
spinning components
Fig.3. The patented RD coating for Rieter rotors.