Topic : Information of blow room line

machines

• Aqsa khan • Department of fibre and textile technology ,UAF • Redg # 2015-ag-6249

Blow room :

• The section where the supplied compressed bale is turn into a uniform lap of particular length by opening , cleaning , blending or mixing is called blow room section .

• It is first step of spinning .

Flow chart of blow room line (conventional)

Hopper bale opener :

Objects :i) To mix the various varieties of cotton thoroughlyiii) To open un clean the cotton.iv) To extract the iron particles from cotton.

Stack Mixing:According to the proportion, different varieties of cottons to be mixed are uniformly . The cotton is fed into the creeper lattice of the bale opener.Creeper lattice will deliver the cotton on feed lattice. By the movement of feed lattice, the cotton is conveyed against the spiked upright lattice.Swing door is used to control the feed in the main bin or maintain the constant level of cotton on feed lattice.

Due to the spikes on the inclined lattice and direction of movement, lumps of cottons will be carried upwards by the inclined lattice. Hard pressed layers of cottons are well combed by the spikes of the inclined lattice. Rapidly revolving spikes of the evener roller (or regulating roller) beats and open the cotton.

Stripping roller strips the cotton from inclined lattice and projects it over grid bar system where sand and heavy trashes are extracted.The cotton falls into an outlet funned are taken away pneumatically to the next machine through pneumatic pipes.In the outlet funnel, permanent magnets are fitted to extract the iron particles . Suction fan is provided in the top of the machine and sucks the dusty air which is settled down in the cellar.

Ultra cleaner / Step cleaner : • Object of Step/ultra Cleaner Machine:

To open & clean the cotton by combinations of opposite spike action & the beating action.

• Main Parts :i. Motor.ii. Motor pulley.iii. Beaters.iv. Baffle plate.v. Grid

• Vi. Photo-cell

Step cleaner

.

Feeding section :Condenser is employed to feed cotton to the step cleaner. Photo-cell arrangement in the reserve tower unit monitor the height of reserve fibres and signals stop or start commands to the proceeding machine. Cotton is fed from the reserve tower by pair of feed roller

Beating section :The rapid revolution of 6 beating cylinders (multiple beater)and beating of the spikes on cotton against grid barcentrifugal force and gravity combine effectively to open the cotton and remove the heavier impurities. Heavier impurities, dust & dirt particles, short fibres , etc, from the cotton are passed through the spacing of the bars and is collected outside the grid bar.

SALIENT Features OF STEP CLEANER ARE:

i)Effective Micro dust Extraction by dust hood.

ii) The degree of opening and trash extraction can be adjusted for a very wide range of cotton types and grades by changing the speed of beater, (460,640 and 800 rpm) and the profile of grid to beater.

iii) Action of multiple beater and grid bars Removes heavy impurities and remove maximum trash.

v) Simple efficient unit suitable for all classes of cotton.

vi) Design features facilitate integration with Centralized waste extraction system.

vii) Adjustable grid bar profile to optimize cleaning efficiency.

Vertical/twin opener :

Working principle and features of vertical opener : It consists the inlet pipe into which the tufts are blown by the material transport Fan.The rapid revolution of the vertical beater shaft, heavier beating of the striker in cotton against grid bar, centrifugal force and gravity combines effectively to open the cotton and remove the heavier major trash particles from it.Due to opening of cotton tufts, heavy dust, dirt, sand particles, seed bits & other Vegetable particles, short fibres and other foreign impurities are extracted and passed through the spacing of the grid bars, surrounding the beater. Vertical opener is used to process only low grade and short staple cottons.Due to high degree of opening action and major cleaning point vertical opener is not recommended for processing long stapled fine cottons.

How cotton tend to rise to the top of the machine ?

Porcupine opener :

Working principle :

The cotton fed is carried forward by the feed lattice. The sheet of cotton now pass between pedal and pedal roller. 16 circular disc are mounted on the shaft of this opener. 14 to 18 striker blades are arranged alternatively on each circular disc. Each striker is bent to a slightly different angle.The compressed sheet of cotton delivered from the feed roller is heavily beat by the rapidly revolving striker of the porcupine beater against grid bar.

Stripping rail is provided, this is a metal bar which is set about 1/16 inch away from the end of the striker. This small clearance between stripping rail and striker prevents bunches of cotton being carried around by the beater.

Cotton from the beater region is taken out by the air current set by the fan and is deposited on to the cages.

The compressed sheet of cotton is delivered from the cage by means of pair of delivery roller to the next process.

Note : While processing fine cotton and viscose rayon, porcupine opener is not recommended

Hopper feeder :

Importance of feed control in Hopper Feeder:

The volume of cotton contained in the reserve bin determine the regularity or uniformity of the lap.Front sheet should be set properly according to the lap weight per yard required.Improper feeding in the hopper and improper setting of front sheet will tend to produce too heavy or low weight lap (or) non uniformity lap which causes to reject the lap.So feed control in Hopper Feeder is important in the blow room line to produce uniform lap.

Blow room scutcher :

OBJECTS OF THE SCUTCHER ARE:

i) To further break down and clean the cotton tufts by a beater

ii) To convert the mass of cotton fibres into a uniform thick sheet of cotton both longitudinally and transversely and wound in the form of a compactly built lap

*TWO WAY DISTRIBUTOR distribute the cotton from opening and cleaning line of Blow room line into two scutcher equally.* CONDENSER WITH FAN Suck the material from two waydistributor and feed it to the reserve bin of hopper feeder.* Hopper feeder ( with Reserve feed & delivery ) mix, comb,open and clean the cotton. At last it provide uniform feeding of cotton upon the lattice, across the full width of scutcher.* Pedal feed motion control the feed and maintain the weightof cotton fed per unit time as constant for lap weight unitormity.* 3 Bladed Beater Open and clean the cotton.

* Cage with fan Suck the material from Bladed beater,extract the lighter impurities and it provide uniform feeding as a 3sheet form on lattice across the full width of the scutcher * Again one set of pedal feed motion, 2 Bladed Beater & cagewith fan is placed and above mentioned works are achieved/ repeated.*At last, cylinder Roller section Compress the sheet of which is delivered from cage.*Compressed sheet of cotton now pass under the dead roller. and is wound on lap roller, which is called lap.

Blow room(conventional) sequence :

Automatic bale opening machine :

First generation bale opening machines were the mostly stationary. Only the bales were moved , either backward and forward or in a circle . The second generation machines are of travelling type the moves the bale of the layout and extract material from top to bottom . This machine is completely electrically controlled Various bales are fed to the bale opener and it separate the cotton into small tufts

Features of bale opener:

• Fiber saving even opening .• Production rate 1500kg /hr. • Easy operation ,minimal maintainanace. • Universally applicable . • Up to 3 bale groups at the same time. • Continuous bale supply

UNIclean : (rieter)

THE UNIQUE WORKING PRINCIPLE The material is fed to the UNIclean B 12 where it is picked up by special pins and passed five times mechanically over the cleaning grid. During the process the raw material is guided over the integrated dust extracting filter where dust, fiber fragments and fi ne trash particles are stripped off mechanically. The combination of newly developed grid bars, optimized material flow and increased dedusting area guarantees an efficient cleaning effect also at high rates of production. The cleaning process is not affected by air currents and is thus controlled and effective

OPTIMUM CLEANING

High cleaning performance and low losses of good fiber can be quickly checked by visual waste control. The quality of waste removal can also be assessed whilst the machine is in operation.

UNImix (rieter) :

Main benefits :

• Intensive three point blending .

• Production : 1200kg/hr• large storage capacity

ensure continuous feeding

Working principle :

The machine is made up of three parts: a storage section, an intermediate chamber and a delivery section. Tufts are fed pneumatically and simultaneously into eight chute arranged one behind the other in the storage section. A conveyor belt feeds the stock through the intermediate chamber to the spiked lattice. The material columns are thus diverted from the vertical into the horizontal.. Thereafter, as in a blending opener, material is extracted from the intermediate chamber and subjected to a further opening step between an inclined spiked lattice (3) and an evener roller (4) (short-term blending). An optical sensor ensures that only a small quantity of fiber stock is held in the mixing chamber in front of the lattice (3). Behind the spiked lattice there is a take-off roller and a simple pneumatic suction feed to the next machine

Uniflex :

1. Filling chute 2. Perforated drum 3. Distance between

feed through 4. Grid 5. Opening cylinder 6. Fan

Objective : for opening cleaning and dedusting of cotton .

Rieter blow room line :

References :

http://yarnmanufacturing.blogspot.com

https://textlnfo.wordpress.com

http://www.rieter.com