26 and SB-D 26 offer optimum quality and productivity
on a small footprint
by Bernd Frinzel,
Product Management Draw Frame, Machines & Systems.
Rieter presented the new
double-head autoleveler draw frame RSB-D 26 to a wide audience
for the first time at ITMA Asia in Shanghai. The double-head
draw frame SB-D 26 without autoleveling function is also new.
Both draw frames offer a number of innovations resulting in
lower production costs, better sliver quality and easier
operation and maintenance.
Fig. 1: The new RSB-D 26 double-head autoleveler
draw frame – Maximum productivity
combined with precise autoleveling technology for
high sliver quality.
Even greater performance: The double-head
autoleveler draw frame RSB-D 26 (Fig. 1) and the
double-head draw frame SB-D 26 without autoleveling function
complement each other perfectly. Compared to its predecessor
models, the RSB-D 26 with patented ECOrized drive concept has
lost a quarter of the belts, numerous drive elements and the
differential gear. The frequency-controlled drive for the
suction and the individual drive for the coilers are unique
(Fig. 2). The straight belt tracking increases the
lifetime of the belts considerably.
Fig. 2: The servomotor for the coiler allows rapid
optimization of the speed.
The new drive solution allows savings of up to EUR 1500 per
year and machine. Over the lifetime of the machines, this means
an extremely attractive return on the investment.
As a standard feature, the draw frames are now equipped with
integrated energy monitoring. This supports preventive
maintenance and can reduce the risk of machine failures.
More productivity without any loss
The draw frame SB-D 26 without an autoleveling function and
the autoleveler draw frame RSB-D 26 produce, in practice, at a
delivery speed of up to 1200 m/min. Depending on the fiber
material, this means that up to 33% higher speeds compared to
predecessor models are possible. The excellent scanning
precision and high autoleveling dynamics of the RSB-D 26 ensure
the high level of quality.
Further optimized drafting system
Conventional sliver guides in front of the drafting system
pose a risk of incorrect adjustments. The most common
consequence of this is non-centric guidance of the slivers and
the resulting disturbing faults in the yarn. The patented sliver
guide of the new D 26 generation guarantees centric guidance of
the slivers at all times (Fig. 3). The web width
is set to a reproducible dimension by simple turning of the
guide elements. Additional fiber guides in the main drafting
field prevent lateral slipping of the edge fibers. As result,
there are fewer disturbing faults in the yarn.
Fig. 3: Patented sliver guide for consistent and
Due to the reduced heating of the lifetime lubricated top
rollers, the lifetime is increased and maintenance is reduced.
Active sliver separation by the RSB-D 26 ensures trouble-free
can changes when processing chemical fibers. A thin place is
deliberately created for this purpose in the autoleveler
drafting system which breaks during the subsequent can change.
Clean sliver coiling
The CLEANcoil coiler is suitable as standard equipment for
all fiber materials. The spiral coiling tube ensures coiling
without drafting faults. Even at high delivery speeds. The
honeycomb structure on the coiler underside reliably prevents
The CLEANcoil-PES coiler for processing 100% polyester
(Fig. 4) is new. A special type of coating offers unique
advantages in coiling. Even with critical polyester fibers, the
production time until the next cleaning cycle can be doubled.
This leads to more consistent sliver and yarn quality.
Fig. 4: CLEANcoil-PES: The coiler with a special
surface for 100% polyester doubles
the production time until the next cleaning.
For cotton the CLEANtube equipment ensures sliver coiling
without accumulations of trash. The intelligent control of the
coiler drive ensures that no trash particles and short fibers
accumulate in the sliver duct. The sliver coiler can be quickly
optimized during operation if necessary. Individual drives for
the can plates allow convenient adjustment of the speed and
direction of rotation on the display.
Touch display and LED displays for
The SB-D 26 and RSB-D 26 use the latest generation of
controls with a colored touch display. This allows quick and
easy operator guidance. LEDs visible from a distance provide
information about the status of the draw frame, provide clear
indications for the operator and also allow efficient work
Fig. 5: The clearly structured display with LEDs
a distance allows easy and efficient operation.
Technological expertise in the
Once the raw material data has been input, recommended
settings for the whole machine appear on the display. A good
standard quality can therefore be achieved even when specialists
are not available or the staff are inexperienced. The basis is
the well-known SLIVERprofessional expert system that is now
incorporated into the machine control. Settings can quickly be
correctly transferred to other machines via a USB interface.
SLIVERprofessional also provides assistance with analyzing
faults, for example by displaying periods and draft waves in the
spectrogram. Operators can thus quickly rectify faults and
increase the availability of the machine. Connection to the
Rieter SPIDERweb mill monitoring system is possible and helps
improve the efficiency of the system.
Minimal space requirements
The small footprint of the machines makes them ideal for
applications where space is limited. With a machine width of
less than three meters, the SB-D 26 is not only the most compact
of its class but, together with the RSB-D 26, also forms the
most compact draw frame line on the market. Both models allow
mounting both on the floor of the hall and recessed into the
floor. For maximum flexibility regarding sliver feed there is a
selection of variants with cans arranged in two, three or four
rows to ensure maximum flexibility for sliver guidance.
Established benefits preserved
The new generation of draw frames includes all the unique and
in some cases patented features of the predecessor models
SB-D 22 and RSB-D 24. The completely independent sides of the
machine and the autoleveling of the RSB-D 26 guarantee high
sliver quality on both heads. A sensor ensures exact first
sliver coils, even with cans where the plates are too low.
Constant suction in the drafting system and lifting cleaning
lips on the top rollers guarantee the best Classimat values in
With the new RSB-D 26 and SB-D 26 draw frames, Rieter has set
another milestone in draw frame engineering with the declared
aim of offering the customer the best possible machine quality
for their mill.