The document describes the blow room process in the yarn manufacturing process. It discusses the five operating zones of the blow room: bale breaker, axe flow cleaner, step cleaner, multi-mixer, and RN cleaner. It also outlines the five actions that occur: opposing spikes, air current, beating, regulating, and gravity/centrifugal forces. Finally, it provides details on the typical machine sequence in a blow room and important precautions to consider.

1. Blow Room
Process

2. Contents:
 Introduction
 Overview
 Objectives
 Five Operating Zones of Blow Room
 Five Actions of Blow room
 Machine sequence and comparison
 Precautions

3. 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

4. Objectives:
1. Opening of bales.
2. Cleaning of fibers.
3. Mixing and Blending .
4. Regularization.
5. Lap formation.

5. Overview:

6. 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.

7. Parts of Bale Breaker.
 Creeper lattice
 Feed lattice
 Inclined lattice
 Evener roller
 Stripper roller
 Cleaning roller
 Swing door
 Suction fan

8. 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

9. 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

10. 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

11. 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

12. 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.

13. 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.

14. Actions of Blow
Room
• ACTION OF OPPOSING SPIKES.
• ACTION OF AIR CURRENT.
• BEATING ACTION.
• REGULATING ACTION.
• ACTION OF GRAVITY & CENTRIFUGAL FORCES.

15. 1) Action of opposing spikes.
 Spikes are metallic elements.
 Performs gentle opening of the fibers.
 Heavy impurities are removed in this action.

16. 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.

17. 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.

18. 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.

19. 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.

20. Machine Sequence of Blow
Room:

21. 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 details
Production is 1200 kg/h
Mostly bale length taken is
7.2 to 47.2 metres.

22. Axe flow cleaner
•Technical Details Power
consumption: 7.75 kW
•Production: up to 800 kg/hr
Technical details
Production output of up to 1400 kg/h .
B 12 UNICLEAN PRE-CLEANER
Energy consumption is low 6 KW

23. 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 details
production 800-1000 kg/hr
Power consumption 4-.5.5 kw
Key features
6/8 chambers

24. Technical details
Seed range of beater is 700-850 rpm
Beaters are arranged vertically
Provides full beating point to material
Rn cleaner
Krischner beater 1100-1200
rpm

25. 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.

26. References
• http://www.rieter.com/en/rikipedia/articles/fibre-preparation/the-
blowroom/the-machines-comprising-ablowroom-
for-card-feeding/scutcher/
• http://ategroup.com/textile-engineering/spinning/product-
family/blowroom/
• http://www.rieter.com/en/rikipedia/articles/spinning-preparation/

27. Thank you for your time and
attention 
Any
Questions?