Introduction: In
processing the material, different types of machines are necessary,
namely those suitable for opening, those for cleaning and those for
blending. Different intensities of processing are also required, because
the tufts continually become smaller as they pass from stage to stage.
Accordingly,
while a coarsely clothed cleaning assembly is ideal after the bale
opener. For example, it is inappropriate at the end of the line.
Therefore, there are no universal machines, and a blow room line is a
sequence of different machines arranged in series and connected by
transport ducts.
In its own position in the line, each
machine gives optimum performance – at any other position it gives less
than its optimum. Also there may be advantages in different modes of
transport, feeding, processing, and cleaning and so on from one machine
to another along the line.
Assembly of a blow room line: Finally, the assembly of a blow room line depends among other things on:
- The type of raw material;
- The characteristics of the raw material;
- Waste content;
- Dirt content;
- Material throughput;
- The number of different origins of the material in a given blend.
Fig-1: Technological performance of a blow room line and influencing factors
Blow room line:
- Bale opener UNIfloc A 11;
- Pre-cleaner UNIclean B 12;
- Homogenous mixer UNImix B 75;
- Storage and feeding machine UNIstore A 78; 5. Condenser A 21;
- Card C 60;
- Sliver Coiler CBA 4
Fig-2– Rieter blow room line
Now details are given below
Bale opener UNIfloc A 11: Rieter
UNIfloc A 11 uses single plucking roller, called as take-off roller.
The take-off roller along with narrow grid results in small tufts size.
The same roller can be used for processing cotton as well as man-made
fibers. The roller teeth can also be replaced individually. The
automatic bale opener regularly measures the profile of the lay down
material for gradual level out the bales as shown in fig-2.
Fig-3: Bale opener UNIfloc A 11
Pre-cleaner UNIclean B 12: The
UNIclean B 12 pre-cleaner cleans the micro tufts in the first cleaning
stage immediately after the UNIfloc A 11. This enables machine output of
up to 1 400 kg/h to be achieved. Cleaning is performed without nipping
and is therefore very gentle to the fibers and at the same time
efficient. VARIOSet enables waste volume and waste composition to be
adjusted optimally at the push of a button. This ensures a high level of
raw material utilization.
Homogenous mixer UNImix B 75: The B 71/B 75 UNImix
guarantees homogeneous, intimate mixing of the bale feed, even with
unfavorable bale lay-down. The unique 3-point mixing process is equally
suitable for cotton and man-made fibres. Eight mixing chambers ensure
not only effective mixing, but also high output and large storage
capacity. Disturbances during bale take-off are prevented from having an
adverse impact on subsequent processes.
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Fig-4: Homogenous mixer UNImix B 75:
Storage and feeding machine UNIstore A 78: The
UNIstore A 78 is used as a storage, de-dusting and feeder machine in
the blow room. Its main purpose is to provide intermediate storage for
material in order to ensure trouble-free blow room operation. Long
piping distances are frequently found to interfere with the smooth
running of the processes and intermediate storage is necessary in many
cases. The UNIstore A 78 is used where a mixing opener proves unsuitable
for financial, technical or technological reasons.
The
integration of a mesh screen filter inside the UNIstore A 78 eliminates
the transport air, and creates an efficient de-dusting. The structure
of the feeding and opening unit guarantees gentle fiber opening.
Fig-5: Storage and feeding machine UNIstore A 78
Here,
1) Material input; 2) Material discharge; 3) Opening rollers; 4) Feed
rollers; 5) Perforated metal platform air discharge; 6) Light barrier
for monitoring material height; 7) Open exhaust air transfer.
Card C 60: With
its unique geometry in the carding zone, the C 60 high-performance card
provides one of the main building blocks for achieving financial
success. With a working width of 1 500 mm, output by the C 60 card is up
to 50% higher than on conventional models – and is combined with
superior sliver quality. The ratio of output to energy and space
requirements is revolutionized by the C 60. It is available with coiler
(CBA), integrated draw frame without leveling (SB module) and in the
auto leveling version (RSB module) for use in the OE direct process.
Conclusion: Rieter
blow room is an important part of making yarn. It is the first m/c
which makes input of carding m/c. It follows some line diagram in
processing fiber. It is very important to follow these lines to finish
the processing properly.
