blowroom process in spinning
TRANSCRIPT
Blow Room Process
Contents:
Introduction Overview Objectives Five Operating Zones of Blow Room Five Actions of Blow room Machine sequence and comparison Precautions
What is Blow Room?
Combination of two words “blow” and “room.”
Main processes are done with the help of air flow.
Introductory process of yarn manufacturing. Tuft size becomes smaller and smaller. Some impurities are removed.
Blow roomBales Lap
Objectives:
1. Opening of bales.2. Cleaning of fibers.3. Mixing and Blending .4. Regularization.5. Lap formation.
Overview:
Operating Zones of Blow Room
Bale Breaker. Bale breakers also called bale openers. Cottons bales are manually opened and then
fed to bale breaker. Micro dust is removed from the cotton by
suction from the suction fan at the top of the machine.
Cleaning efficiency of bale breaker is 30-40%. Bale breaker produces a very less loss of lint
along with the waste.
Parts of Bale Breaker.
Creeper lattice Feed lattice Inclined lattice Evener roller Stripper roller Cleaning roller Swing door Suction fan
Axe Flow Cleaner.
The major object of axe-flow cleaner are opening and cleaning. It is used in the blow room after bale breaker.
The feeding of material takes place by means of air currents produced by a condenser.
Parts of Axe-Flow Beaters Deflector plate Grid bars Scroll bar
Step Cleaner.
The major objective of a step cleaner is cleaning, but opening and mixing are also achieved on this machine.
Parts of Step Cleaner Beaters Grid bars Baffle plate Trash box
Multi-Mixer
In multi mixer different types of cotton are mixed. A multi mixer also known as 8-fold feeding trunk
has the main advantage of having high capacity because of its great height which gives rise to the overlapping and a continuous operation as well.
Parts of Multi-mixer. feed duct Flaps Chambers Take-up rollers Beater
RN-Cleaner
The RN-cleaner operates in the cleaning and opening zones.
It provides a full-beating point to the material. The beaters are arranged vertically The speed range of the beater is 700-800 rpm
Krischner Beater
It consist of 3-armed siders loaded with nail like pins projecting from the surface. The pin are arranged throughout the width of the of the arm of the beater.
Fine cleaning of material is done. Opening is required to make a uniform lap
sheet.
Scutcher
Opening of cotton to single fiber state. Cotton cleaning by removal of heavy trash
particles. Regularization of material. Making of uniform sheet of lap. Pressing of the sheet and its winding on the lap
roller.
Actions of Blow Room
• ACTION OF OPPOSING SPIKES.• ACTION OF AIR CURRENT.• BEATING ACTION.• REGULATING ACTION.• ACTION OF GRAVITY & CENTRIFUGAL FORCES.
1) Action of opposing spikes. Spikes are metallic elements. Performs gentle opening of the fibers. Heavy impurities are removed in this action.
2) Action of air current. Used for the transport of material in blow room. Cotton tufts flow from one machine to another
by air current. During this process, microdust is also removed
by suction through perforated cages.
3) Beating Action. This action is performed by the beaters. These are cylindrical spiked surfaces. These rotate around a central axis for severe opening of
cotton.I. Half beating point. The material rotates freely around the beaters. It is not gripped by the pair of rollers.II. Full beating point. The fibers are gripped by the pair of rollers. This point is usually given at the end of blowroom.
4) Regulating Action. Formation of regular lap can only ensure the
formation of regular yarn. Any irregularity in lap will be accordingly sent to
sliver, roving and finally yarn. Limit switches and swing doors are used to
regularized the feeding to the next machine.
5) Action of gravity & Centrifugal forces. These remove the heavy trash particles from
cotton through the opening of grid bars. These bars are present under the beaters.
Machine Sequence of Blow Room:
Blendomat - BO-A(Bale opener for gentle fibre handling)
• Technical Details Length of machine: minimum: 23.13 m; maximum: 50.27 m•Power consumption: 12.6 kW•Production: up to 1600 kg/hr• Key Features •Working width max. 2300 mm, and machine length of 50 m•Upto 180 bales
Unifloc A11
Technical detailsProduction is 1200 kg/h Mostly bale length taken is 7.2 to 47.2 metres.
Axe flow cleaner
•Technical Details Power consumption: 7.75 kW•Production: up to 800 kg/hr
Technical detailsProduction output of up to 1400 kg/h .
B 12 UNICLEAN PRE-CLEANER
Energy consumption is low 6 KW
Universal Mixer MX-U 6/10
• Technical Details •Production: 1000-1400 kg/hr•Power consumption: 3.5 - 4.5 kW
• Key Features •Pressure sensing•6/10 chambers
Multi mixer machine
technical detailsproduction 800-1000 kg/hrPower consumption 4-.5.5 kw
Key features6/8 chambers
Technical detailsSeed range of beater is 700-850 rpmBeaters are arranged verticallyProvides full beating point to material
Rn cleaner
Krischner beater 1100-1200 rpm
Precautions Proper humidification inside the Hall . Functioning of all the exhaust fans. proper housekeeping and cleaning. prevention of flying of cotton dusts in
open air. use of mask by the operators. proper maintenance of the machines
will help in maintaining the dust level.
References• http
://www.rieter.com/en/rikipedia/articles/fibre-preparation/the-blowroom/the-machines-comprising-ablowroom-installation/machines-for-card-feeding/scutcher/
• http://ategroup.com/textile-engineering/spinning/product-family/blowroom/
• http://www.rieter.com/en/rikipedia/articles/spinning-preparation/
Thank you for your time and attention
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