This document provides details about a sessional report for an experiment on studying a blow-room line. It includes: 1) An introduction describing the purpose of a blow-room section in yarn production and the machines used (Uniflock, Uniclean, Unimix, Uniflex). 2) Objectives of the experiment such as forming clean tufts of uniform length and observing machine functions. 3) A diagram and explanation of the blow-room line and its functions like opening, cleaning, and mixing fibers. 4) Workings principles of the individual machines - Unifloc, Uniclean, Unimix - and processes like opening, cleaning, and mixing they

1. KHULNA UNIVERSITY OF ENGINEERING & TECHNOLOGY
(KUET)
Sessional Report
Course no : TE2102
Experiment no : 01
Name of the Experiment : Details study of the Blow-room line .
Remarks
Date of Performance : 19-01-2022 Name : Md Shetu Mia
Date of Submission : 26-01-2022 Roll No : 1821012
Group No : A
Year : 2nd
Semester : 1st

2. 1.0 Introduction
Blow room is the first step of yarn production in spinning mills. A section in which
compressed bales are opened, cleaned and blending or mixing to form uniforms lap
of specific length is called Blow room section. The cleaning efficiency of blow room
is 40 to 70%. This is the first section of spinning line for spinning of cotton yarn.
primary objectives of this department are opening, cleaning together with mixing of
cotton fiber fiber. There are sets of mechanism are placed inwards this section.
Machine together with fiber catamenia sequence inwards blow room
Uniflock
↓
Uniclean
↓
Unimix
↓
Uniflex
Cleaning efficiency of blow room section is 60-70%. If at that topo graphic point
are 3% trash introduce inwards bale cotton fiber together with so later on passing
of blow room section, at that topo graphic point are solely 1.2 - 0.9% trash
introduce inwards delivery blow room cotton. Metal, dust together with unusual
fiber are besides separated inwards this section.
Basic functioning inwards blow room:
1. Opening the cotton fiber fiber
2. Cleaning the cotton fiber fiber
3. Homogenious mixing or blending of cotton fiber fiber.
4. Dust, metallic together with unusual fiber removal.
5. Transportation of fiber from ane machine to side yesteryear side
machine.

3. 2.0 Objectives
❖ As pocket-size every bit possible pocket-size of build clean tuft formation
from bale cotton.
❖ Uniform feeding to the carding machine.
❖ To acquire knowledge about Trutzschler Blow room line.
❖ To know the function of every machine used in Trutzschler Blow room line.
❖ To visualize how the fibers are passed through every machine.
❖ To observe the different action i.e. opening, cleaning, beating performed by
beating points.
3.0 Diagram of Blow -room Line & its fuctions
➢ Opening the compressed bales of fiber and making the cotton tuft a
small size as far as possible.
➢ Detecting the metal objects and fire in fiber
➢ Cleaning the fiber by removing the dust, dirt, broken seeds etc. and
other foreign materials from the fibers.
➢ Mixing and blending of different classes or grades of fibers.
➢ Removing foreign fibers and plastic contaminations.
➢ Uniform feeding to the next stage.

5. Principle of Opening and Cleaning
Opening: Opening is the first operation in the blow room carried out to the stage
of Flocks. ln the-blow room and to the stage of individual fibers in the cards.
In the stages of the opening, machines with an opening function have the task of
separating clumps of fiber into smaller ones. The sizes of the clumps, and of the teeth
that deal with them, are progressively reduced. In general terms, grasping clumps of
fibers with sets of teeth and dragging the clumps across another set of teeth or grids
perform the opening function.
Cleaning: With cotton, there are often seed coat fragments attached to them. It is
difficult to remove some of the extraneous matter without vigorous mechanical
action and without adequate opening. Every time a clump of fibers is divided, a new
surface is exposed from which it is relatively easy to remove the loose unwanted
matter (trash).

6. 4.0 Working Principle of Blow Room Line
4.1 Working Principle of Unifloc/BDT/Automatic Bale Opener
➢ In this zone, basic function is to open the fiber from the bale where fibers are
at very compressed and disoriented state.
➢ The opening device has to penetrate into the bale and pick up the tuft of fiber
during releasing from different bales simultaneously. The size of fiber
package is converted from 200 kg to 10 gm/tuft in this zone.
➢ The machine moves to cover maximum bales. Generally, roller with toothed
disc is used for opening device. No beating action but picking is performed
here.
➢ As shown in figure, rotating opening rollers fitted with toothed discs are made
to traverse a line of preassembled cotton bales, the toothed discs plucking tufts
from each bale as they move from bale to bale.
➢ The toothed discs give a gentle opening to prevent or minimize the fiber
breakage while producing smaller tuft sizes at higher production rates than the
mixing bale opener.
Technical data:
Traverse speed: 10~18 m/min
Speed of take-off roller: 1400~1800 rpm
Nominal take–off depth: 2.5~3.5 mm

7. Figure : Unifloc/BDT/Automatic Bale Opener

8. 4.2 Working Principle of Metal & fire detector/ SP-EM
➢ The electronic Metal Separator SP-EM helps to protect the cleaners and
cards from metal parts at the interface between bale work-off and
mixers/cleaners.
➢ Since, in the process, the material transport is performed by the downstream
machine, it is free of exhaust air and requires no filter capacity.
➢ In order to reduce fire damage, the machine is equipped with sensors. They
are connected to the installation control.
➢ In this zone, basic function is to open the fiber tuft to smaller size and to
clean the tuft removing big size of trash butsmaller size of impurities which
are trapped between fibers is not removed here.
➢ Gentle beating action but no picking is performed here.
Figure : Metal & fire detector

9. In this zone, basic function is to open the fiber tuft to smaller size and to clean the
tuft removing big size of trash but
smaller size of impurities which are trapped between fibers is not removed here.
Gentle beating action but no picking is performed here.

10. The system comprises two rotating beaters with rods or flexible pins projecting from
its surface and a series of grid bars positioned below the beater. The system is used
as a first cleaning stage for cotton tufts with high trash content and therefore receives
tufts from the automatic bale opener.
The large tufts which cannot get lost through the grid system, follow a spiral path
around the beater to the outlet and make contact with the projections (pins) on the
rotating beater surface several times. The tufts are then struck against the grid bars
to eject coarse trash particles.
Technical data
Diameter of beater: 700~800 mm
Speed of beater: 400~800 rpm
Grid bar setting: 2.5~3.5 mm
4.3 Working Principle of MX-U/Multimixer
❖ In this zone, main function is to blend the raw material of different quality to
equalize and even the mean quality of delivered material. Because natural
fiber generally remains in variation in quality.
❖ The system employed in this zone as shown in fig. comprises six vertical
chambers in sequence.
❖ The technology of outlet is implemented in such a way that material is taken
up by rotating rollers evenly from every chamber and delivered after mixing.
❖ Therefore, mixing takes place homogeneously at the inflow and outflow
position.
Technical data:
Storage volume per chamber: 1.4~2.6
Storage capacity per chamber: 40~80 kg
Speed of opening roller: 1000~1200 rpm

11. 4.4 Working Principle of CL-C3
❖ In this zone, basic function is to open the fiber tuft to smallest size and to
clean the tuft to the greater extent removing even smallest size of trash and
dust which are trapped between fibers.
❖ The system comprises 3 rotating beaters with carding saw tooth wire
projecting from its surface with different gradual point density and a series
of grid bars positioned below the beater.
❖ The system is used as a last opening and cleaning stage for cotton tufts in the
blow room and therefore receives tufts from the coarse cleaner and opener.
❖ Importantly, the beater speed should progressively increase from beater 1 to
3 (for example 900, 1100, 1400 rpm).
❖ Hence, the mean tuft size is decreased from 1 mg by the first beater to 0.7
mg, 0.5 mg by the second and third beater. Cleaner CL-C3.

12. 4.5 Working Principle of SP-FP
❖ The black arrow indicates the direction of the fiber mass flow as shown in
figure.
❖ The 3 CCD camera that give high but uniform illumination with two fields.
The cameras detect the distorted colors or contrasts generated by the
polarization in light polypropylene and transparent or semi-transparent PE
foils.
❖ On detection of a contaminated part of the fiber mass, a combination of a
compressed air nozzle beam and speed sensor are selectively activated to
blow the contaminated part of the fiber mass from the fiber channel into a
waste suction unit.
❖ Therefore, the fiber mass is screened to be free of material contaminants.

14. Riter Blow Room Line
Unifloc
It is a bale breaking together with opening machine. It travels at uniform speed from
showtime to final bale of cotton fiber together with collect the fiber inwards pocket-
size size from bale cotton fiber together with supplied to the side yesteryear side
machine. This machine takes the fiber textile gently together with efficiently from
bales at micro tufts size together with supplies to the side yesteryear side machine
from which impurities tin hold upward removed real quickly inwards the subsequent
processes.
Fig: Unifloc machine

15. Uniclean:
It is a coarse cleaning machine. The pocket-size tufts of uniflock machine are fed
inwards this machine. There are opening roller consists amongst many spikes helps
to opening the tuft of fiber together with amongst combination of grid bar fiber is
cleaned here. Trash, dust together with unusual textile of cotton fiber fiber are
separated yesteryear this machine. Cleaning is performed without nipping together
with is thence real gentle to the fibers together with at the same fourth dimension
efficient. This ensures a high score of raw textile utilization. The output of the
machine is upward to 1200 kg/h to hold upward achieved.
Fig: Uniclean machine

16. Unimix
It is a mixing machine of 6-8 chute chambers into which the output textile of uniclean
is blown. Here chute chambers are filled successively together with removed
simultaneously. This regulation of this mixing machine helps to homogenous,
intimate mixing of the opened cotton fiber inwards a minimum of space, fifty-fifty
amongst unfavorable bale lay-down. This gives uniform long term mixing or
blending of fibers. Production of this machine is upto G kg/hr.
Fig: Unimix machine

17. Uniflex:
It is a fine cleaning machine. Mixed cotton fiber is fed to this machine for
intensive cleaning. Tuft of cotton fiber are converted into real pocket-size size
together with cotton fiber are cleaned yesteryear removing impurities (leaved,
sand) without farther harm of fiber. Beater speed, no of spikes together with grid
bar setting play of import purpose for cleaning of cotton.
Fig: Uniflex machine
➢ There are besides metallic extractor, dust collector, unusual fiber extractor
together with condenser introduce inwards blow room line.
.

18. 5.0 Conclusion
Now a days spinning technology has been updated largely. For this reason
production has been increased and quality of yarn has been ensured. Modern Blow
Room Machineries of trutzschler company are being used in our spinning
factories largely at present. So as a undergraduate textile engineer it is essential for
us to gain vast knowledge about Trutzschler Blow Room Machineries. This
experiment has given us this opportunity to gain more knowledge about trutzschler
Blow Room Machineries. From this experiment we have learn about the function,
feature, origin and working principle of different Blow Room Machineries of
trutzschler company in details. This gained knowledge from this experiment will be
very helpful in our job life.