Modern Blow room Line of Rieter

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:

1. The type of raw material;
2. The characteristics of the raw material;
3. Waste content;
4. Dirt content;
5. Material throughput;
6. 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:

1. Bale opener UNIfloc A 11;
2. Pre-cleaner UNIclean B 12;
3. Homogenous mixer UNImix B 75;
4. Storage and feeding machine UNIstore A 78; 5. Condenser A 21;
5. Card C 60;
6. 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.

 
             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.

                                                      Fig-6: Card C 60

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.