This document discusses the development of drawframes in the spinning process. It describes key components and functions of drawframes, including drafting, doubling, and blending of slivers. Recent developments that improve quality, such as autolevellers and automatic break draft setting, are also covered. The document provides specifications for drawframe models from different manufacturers and concludes by discussing the use of new monitoring technologies like cameras and microwave sensors to further enhance sliver quality.

1. Dr.B.R. AMBEDKAR NATIONAL INSTITUTE
OF TECHNOLOGY, JALANDHAR
PUNJAB, (INDIA)
“ DEVELOPMENT OF DRAWFRAME ”
PRESENTED BY
ANIL KUMAR

2. DEVELOPMENT OF DRAWFRAME
 Draw frame is most important machine of the
spinning mill.
 The process is known as DRAWING.
 It is a process of yarn manufacturing in which the
sliver is elongated when passes through pairs of
rollers . Each pair moving faster than the previous
ONE.

3. OBJECTIVES OF DRAWFRAME
 Quality of yarn is directly Related to the Quality of
drawframe sliver.
 To improve the EVENNESS,UNIFORMITY of the
sliver.
 To make perfect blending of the component.
 To parallelize the fibre of card sliver and align
them to the axis of the sliver through drafting
process.

4. TASKS OF THE DRAWFRAME
1- Drafting 2- Equalizing
3- Parallelizing 4- Blending 5-
Dust removal

5. DRAWING = DRAFTING + DOUBLING
 DRAFTING - It is the process of increasing length per
unit weight of sliver.
 DOUBLING-
 The process of coming two or more carded sliver into a
single form is called doubling.
 In drawframe machine generally six slivers are fed to
convert into one sliver , that is called six doubling.

6. RECENT DEVELOPMENT OF
DRAWFRAME
 Auto break draft setting – Incorrect break
draft increases yarn U%. When there are
imperfections and neps , the total draft does not
effect yarn quality much. So break draft plays a
very significant role in yarn quality and must be
set correctly.
 Pneumatic pressure Head for the drafting
rollers. This technology can control pressure for
sliver automatically and from that better fibre
control can be achieved.

7. Tension measuring system
 When the card sliver is fed to the draw frame , there is a long
path to travel . So on way there will be tension variations due
to friction forces and weight of the sliver. To avoid these
tension variations there are tension measuring sensors to
detect and adjust the roller speeds according to it.

8. WHAT IS AUTOLEVELLER ?
• It is a online monitering device in spinning
process.
• It has become an integral part of the spinning
process for production of high quality yarn.
• It helps in achieving consistent count cv%.

9. NEED OF AUTOLEVELLER
 To survive in this ago of high competition , it has
become necessary to produce an internationally
accepted standard yarn quality.
 Carded sliver fed to drawframe have high degree of
uneveness that cannot be tolerated.
 Higher CV% affects the appearence of dyed fabrics by
absorbing the dye unevenly.

10. Object of autolveller
 To maintain consistent hank of slver.
 Principle: Adjust the draft continuosly, which will
depend on thickness of material fed.

11. TYPES OF AUTOLEVELLER
 Various parts of autoleveller
1 - Scanning roller
2 - Signal convertor
3 - Levelling processor
4 - Main motor
5 - Quality monitor sensor
A= measuring
sensor
B= store
C= amplifier
D= adjusting device

12. Advantages of autoleveller
 All variations are corrected.
 Count CV% will be consistent.
 Thin places in sliver and hence in the yarn will
be low.
 Higher efficiency in further processes.
 The single yarn strength also improves by
about 4% in different counts.
 End breaks in spinning get reduced by 9 to
12 breaks per 100 spindle hours in different
counts.

13. • USE A CAMERA TO MONITOR THE SLIVER QUALITY
 This is used to monitor the output sliver behalf on
quality aspects such as arrangement , fibre
imperfections and irregularities.
When there is an imperfection, the machine is
automatically adjusted to eliminate by varying the
machine speed etc...

14. • USE OF MICROWAVE
SENSORS
• This is used in auto leveling to determine band mass
of an elongated, substantially non twisting fibre
structure. This is used the moisture content of the
sliver as the measuring principle.
• FAULT LOCATION INDICATION LAMP SUCH AS,
 RED - when red lamp is on , Then machine will
be stop.
GREEN - If green lamp will appear, then there
must be broke lapping sliver.
YELLOW - Can fulfill.

15. Specifications of different manufacturers of
Draw frame
LAKSHMI MACHINE Ltd.
Model LR SB 851
Delivery speed (max) 800 m/min
Drafting system 3-over-3 With pressure bar
Draft Range 3.05 to 11.6
Roller loading Pneumatic
Autoleveller Yes
No of deliveries Single or twin (LD0/6)
Can system (delivery) Auto doffing (round cans)

16. RIETER MACHINE Ltd
Model RSB
Delivery speed (max) 1100 m/min
Drafting system 4-over-3 with pressure bar
Draft range 4.5 to 11.6
Roller loading Pneumatic
Autoleveller Yes
No of deliveries Single or twin (SB)
Can system (delivery) Auto doffing (round or
rectangular cans)

17. TOYOTA TEXTILE MACHINE Ltd.
Model DX8
Delivery speed (max) 1000 m/min
Drafting system 3-over-3 with pressure bar
Draft range 4 to 14
Roller loading Spring
Autoleveller Yes
No of deliveries Single or twin
Can system (delivery) Auto doffing (round cans)