Blowroom process in spinning

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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