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The Textile Magazine
JUNE 2012
gives customers the assurance of producing yarn of
the best possible quality.
Operating reliability, increased output
Higher output also increases the
strain on certain machine compo-
nents. If this is disregarded, the result
is increased wear and higher oper-
ating costs. At the same time, the
strain imposed, for example, by an
emergency stop can result in unnec-
essarily high stresses and ultimately
in greater wear on the equipment.
However, there is a reliable, correct
solution to every problem. Here are a
few examples:
XR coating on Rieter
opening rollers
“XR” stands for ‘Extra Resist-
ant’. This Extra is achieved by the
application of nano-structured layers
to the opening rollers (Fig.2). Wear
tests on opening rollers with DN
coating clearly demonstrated the
problems that occur when processing sensitive
polyester (PE) fibers: as soon as the nickel layer
of the DN coating has been worn off to a certain
extent and the relatively rough diamond coat-
ing emerges on the surface, the opening rollers
become unusable.
The rough surface results in a deterioration in
running properties, the generation of more dust
in the spinning process, and greater fiber dam-
age. This can lead to higher staff values and dust
generation problems in downstream processing.
The DN-coated opening rollers therefore have to
be replaced when the nickel layer has worn off,
although the diamond coating is not worn.
The XR coating has been developed to deal
with this problem. Its characteristic feature is
extreme wear resistance due to its very high
hardness and the nano-structured composition of
its coating layers. A special surface finish makes
its surface roughness comparable to that of an
uncoated set of clothing. The very smooth, fiber-
preserving surface characteristic remains intact
throughout its service life, thanks to the homogeneous
coating structure. This guarantees uniform spinning
Fig.2. XR coating for Rieter opening rollers
spinning components
Fig.1. Reliable, fast and unique doffing without underwinding
using SERVOgrip.