lrt webtex manual de fiação

LAKSHMI RING TRAVELLERS (COIMBATORE) LIMITED

H A N D B O O K

CUSTOMISED SOLUTIONS TOTAL RANGE HIGHEST QUALITY

INTERNATIONAL PRESENCE STATE OF THE ART R&D

A 6527

A 12382

ISO 9001 : 2000

ISO 14001 : 2004

P R I C E P E R F O R M A N C E R A T I O

PPR

H I G H E S T

1

Lakshmi Ring Travellers (Cbe) Ltd (LRT) started its operation

In 1974 as a trend setter in the highly sophisticated and

accurate sphere of Traveller manufacturing. LRT has two

units manufacturing ring Travellers., One in Hosur, India

and another in Anamalai, Near Coimbatore, India.

LRT is a part of the well known Lakshmi Machine Works

(LMW) group. LMW is one of the largest textile machinery

manufacturers in the world manufacturing the complete

range of spinning machines. As part of this dynamic group

LRT has enormous resources - technology, Expertise and

experience at its command.

LRT has a Modern production faci l ity which ensures

Consistent quality. Raw materials are procured from the

best sources in the world. LRT houses state of the art

testing facilities for measuring hardness, friction, micro

structure analysis And surface finish.

Lakshmi Ring Travellers are manufactured as per the

specific requirements of the industry. Today high speed

spinning machine require equally high speed Travellers.

And LRT, by vir tue of their strong R&D and a highly

involved commitment to the industry provides products

that keep pace with the growth of the industry.

We take this opportunity to thank you for your patronage

to our products. We value the experiences you have

shared with us.

Our experienced technical staff and application engineers

will be pleased to assist you at any time.

Note : All the information given in this handbook are

guidelines based on our experience. The exact recommen-

dations has to be decided at the mill depending on the

prevai l ing condit ions. The technical data avai lable is

subject to change.

LAKSHMI RING TRAVELLERS

2

LRT Extract

Types of Ring Travellers

Function & general selection of Travellers

Prerequisites for smooth and stable running

Spinning Geometry

The Principal Shapes of flange rings

Running - in of Rings

Forces on Rings - C Shaped Travellers

Surface Treatments

Ring / Traveller Combination - Flange 1

Ring / Traveller Combination - Flange 2

Guide to choose a correct Traveller

Trouble Shooting

More Yarn Breaks in Ring Spinning

Choice of Right Travellers

For Higher Spindle Speed

LRT Quickfix

Fluff Remover FR 1

Spinning with flange Travellers

Twisting / Doubling with flange Travellers

Traveller weight comparison table

Numbering system for yarns

Numbering system for Yarn - Conversion formula

Traveller Speed / Performance Calculations

General Calculation

Ring Traveller Recommendations

J-shaped Vertical Ring Traveller

Forces on rings & J shaped Traveller

Ring Traveller types - J shaped Traveller

Weight chart & Traveller recommendation - J shaped Traveller

INDEX

Fluff Remover FR 2

37

4

5

6

7

8

9

10

11

12

13

14

16

17

20

21

22

23

24

25

26

27

28

29

30

31

32

34

35

36

38

3

0

0

0

0

0

0

0

0

0

1. Nose

2. Head

3. Position of yarn path

4. Back

5. Heel

6. Foot

7. Toe

8. Inner height

9. Head width

10. Foot width

11. Nose angle

1. Inner width

2. Height of bow


4. Wire section

5. Ring contact surface

6. Angle of toe

7. Toe

8. Toe gap

9. Upper part of bow

TYPES OF RING TRAVELLERS

C - SHAPED TRAVELLERS

- Used in T-Flange Horizontal Rings

- For Cotton and Synthetics & Blends

J SHAPED TRAVELLERS (STEEL)

- Used in Vertical Rings

- For Coarser Doubling (Cotton), Acrylics, Woolen and Worsted

4

FUNCTION & GENERAL SELECTION OF TRAVELLERS

Function of a Traveller

• to provide Twist to the yarn

• to provide yarn tension (spinning Tension)

• to wind the yarn on the Bobbin

Traveller Weight :

Traveller weight influences the yarn tension.

It is determined by

• The yarn count

• Material Processed

• Spinning Geometry

• Speed

• Traveller form

The Choice of correct Traveller :

It is determined by

• Yarn Count

• Ring flange

• Type of ring

• Life of ring

• Material

• Spindle speed 12. Toe angle

5

PREREQUISITES FOR SMOOTH AND STABLE RUNNING

Fa u l t l e s s

and guide of the ring rail as well as a stead&

smooth traverse motion.

Concentric position of the ring and spindle

as well as anti ballooning ring and yarn

guide.

c o n d i t i o n o f t h e s u p p o r t

Spindle

concentricity of bobbin tube.

Ring with exact roundness and firm seating in

horizontal position.

rotation without vibration and correct

Correct setting of the Traveller clearer.

Space “a” should be 0.2 to 0.3 mm

Favourable ratio of ring diameter to Tube diameter.

Recommended ratio : D : d = 2 : 1

Ring diameter : D Tube diameter : d

Faultless condition of ring race way

6

6

SPINNING GEOMETRY WITH RESPECT TO RING AND TRAVELLER

RECOMMENDED TUBE MEASUREMENTS

Ring (mm) D

ØTube Ø (mm) d Tube length (mm) L

Ideal ratio 2 : 1

The ring Traveller, together with the

yarn as a pull element, is set into

motion on the ring by the rotation

of the spindle.

If the direction of pull deviates too

much from the running direction of

the Traveller (alpha less than 30 ),

the tension load will be too high.

The pulling tension can be reduced

by adapting the ring or tube

diameter (alpha greater th an 30 ),

during the winding up on the

tube (after doffing, resp. At the top

of the conical part of the bobbin).

Ideal ratio 5 : 1

The tube length determines (with

the yarn guide) the maximum

balloon length. This is an important

factor for the performance of a ring

spinning machine.

The shorter the balloon, higher

Traveller speeds can be achieved.

In practical use, the ideal ratio of

tube length to ring diameter has

been shown to be between

4.5:1 and 5:1.

Ideal Range Unfavourable Range

Ratio of

length to ring diameter

tube

Ratio of ring diameter D

to tube diameter - d

7

THE PRINCIPAL SHAPES OF FLANGE RINGS

• In addition to antiwedge, CR antiwedge

will have inclination towards inner side

to get extra clearance for yarn

CR Antiwedge (Assymmetrical)

• Reduced crown portion when compared

with conventional rings

• Flange width is equally distributed towards

inner & outer side

Low Crown / Normal (Symmetrical)

Antiwedge (Assymmetrical)

• Enlarged towards inside to get more

area of contact

Flange width

Flange ½ = 2.6 mm Flange 1 = 3.2 mm Flange 2 = 4.0 mm

8

RUNNING-IN OF RINGS

Why it is Required ?

To improve the initial running properties of the ring by smoothening the

raceway.

Guidelines for Running-in

• End Breaks should be as low as possible

• Count & Traveller Type should not be changed

• If the mill is doing running-in with very fine or very coarse counts or synthetics

it will take longer time.

Short Running -in

We recommend 4 to 5 changes once every 24 hours. Number of changes will

depend on the Ring condition / mill condition.

While increasing the speeds, the Traveller changes to be given in steps of

minimum possible speed (200 to 500 rpm) daily.

We recommend short running in when :

• We change from one count pattern to another ie, from finer to coarser or

coarser to finer counts.

• We change from one Traveller type to another

• We change from one brand to another

• We change from one wire section to another

•

Which is the preferable count & Material ?

40s and Cotton

As per the ring manufacturer ’s recommendation

What is the procedure to be followed ?

9

FORCES ON RINGS - C SHAPED TRAVELLERS

Forces acting on the Traveller (1) in the plane of the ring are as follows

1. Tangential Force Ff

This force arises due to the winding tension of the yarn and always acts

tangentially to the circumference of the cop.

2. Frictional force F

This force acts between the ring and the Traveller. In the stationary

state ie. At constant Traveller speed, the frictional force F is in

equilibrium with the forward component Ft

F = Fh t

F = F Sin αh t

n

n

3. Force F n

This force acts normal to the surface of

the ring This force arises due to the

force exerted by the Traveller on the

ring.

F = µ Fn h

4. Centrifugal Force FZ

2F = mω rZ

m = mass of the Traveller

= angular velocity = 2πn /60 where n = Traveller speed

r = radius of the path of the Traveller = radius of the ring

10

• Better heat dissipation

• Low roughness values

• Smoother yarn passage

• Lesser yarn breaks

• Increased wear resistance leading to more traveller life

SURFACE TREATMENTS

MAXIMA

SAPPHIRE

• Long Life

• Can be used for Running - in

• Better elongation for easy insertion

• Combines performance, Reliability

& Versatility

Diffusion treated Travellers

HI-TECH

• Excellent heat dissipation

• Better Gliding properties

• Possible to go for higher speeds

• Less Traveller burn - out

• Longer life

Nickel coated Travellers added with

special alloying elements

Special har

grain structure & frictionless coating

with better Thermal transfer

dening process for better

11

12

Ring / Traveller Combinations - Flange 1Ring / Traveller Combinations - Flange 1

HO (DR) for synthetic fibres and blends (H2, EH2 & C1SH type Travellers are available in FR)

HWO (UDR) for cotton, synthetic fibres blends

FLANGE 1

51s Ne & Finer

51s Ne & Finer

U1 ML 20s-50s Ne U1 ML

20s-50s Ne

20s Ne & Coarser

30s Ne & Coarser

M1 20s-50s Ne

LOW CROWN/NORMAL RING PROFILE CR/ANTIWEDGE RING PROFILE

24s Ne & CoarserU1 C1 U1 C1

Compact Spinning20’s Ne onwardsU1CL U1CL

FR for Acrylic

12

Ring / Traveller Combinations - Flange 2

FLANGE 2

HO (DR) for synthetic fibres and blends UDR (HWO) for cotton, synthetic firbres and blends

FR for Acrylic (H2, EH2, & C1 SH type Travellers are available in FR) and blends for 20 Ne’s coarser yarns

51s Ne & Finer

20s Ne & Coarser

20s-50s Ne

20s-50s Ne

20s Ne & below

LOW CROWN/NORMAL RING PROFILE CR/ANTIWEDGE RING PROFILE

20s Ne & CoarserC2 C2

13

20Ne’s & Coarser

20Ne’s & Coarser

FLANGE 1 FLANGE 2

s20 Ne & Coarser

U1 C1 UDR

P1 HWO

U1UM UDR

C1SHFR

U1 C1 UDR

EP1 HWO

U1UM UDR

C1SHFR

H2 UDR

P2 HWO

U2UM UDR

H2 HO

C2 FLAT

H2 FR

EH2 UDR

EP2 HWO

U2UM UDR

EH2 HO

C2 FLAT

EH2 FR

M1 UDR

U1UM UDR

U1ML UDR

M1 HO

U1 CL UDR

FLANGE 1

NORMAL ANTI WEDGE NORMAL ANTI

WEDGENORMAL

Recommended Range Possible Range Best For Synthetics Best for compact spinning

14

20Ne’s & Coarser

FLANGE 1

s20 Ne to s50 Ne

s50 Ne

and Finer

FLANGE 2

START

L1 UDR

U1UL UDR

M1 UDR

M1 HO

U1 CLUDR

EL1 UDR

U1UL UDR

EM1 UDR

EM1 HO

U1 CLUDR

M2 UDR

U2UM UDR

M2 HO

EM2 UDR

U2UM UDR

EM2 HO

EM1 UDR

U1UM UDR

U1ML UDR

EM1 HO

U1 CL UDR

NORMAL ANTI WEDGENORMAL ANTI

WEDGEANTI

WEDGE

FLANGE 1

Recommended Range Possible Range Best For Synthetics Best for compact spinning

15

spindle speed

TROUBLE SHOOTING

Problem Causes Remedies

Poor Ring Traveller Life • Improper matching • Correct Traveller Selection

• Poor Ring condition • Good Ring Condition

Less Yarn Elongation • Heavier Ring Travellers • Lighter Ring Travellers

More Yarn Hairiness • Low Bow Height Traveller • High Bow Height Travellers

• Improper Temperature, • Correct RH & Temperature

Air humidity

• Lighter Traveller • Heavier Travellers

Unable to Increase the • Improper Spinning Geometry • Proper lift W.R.T. count

• Poor Ring/Lappet centering • The ratio between ring diameter

• Spindle tube vibration • 1:5 ring dia to tube length

• Improper selection of travellers • 2d + 5 of tube dia for lappet

setting

• Correct centering of Ring/lappet

• Vibration free spindle/tube

• Proper Combination of Ring

Travellers

Fluff accumulation • Improper Traveller clearer • Setting should be 0.2 to 0.3mm

setting Traveller (operating position)

• Higher Room Temperature • Optimum Room Temperature

• Poor RH% • Better R.H%

• Poor House Keeping • House Keeping should be proper

Pushed up neps • Less yarn clearance • High clearance traveller

finish/profile

• Higher wear-out • Use best traveller combination/

finish/profile

• Traveller clearer setting • Clearer setting to be adjusted

16

End

relationship with productivity and Yarn Quality. Following parameters has to

be looked to control the end breaks.

breaks are the main factor in ring spinning, which is having direct

Spinning Geometry

Spinning

related with spinning Tension and spinning triangle.

Geometry plays a vital role in End Breaks and which is directly

• Perfect spinning Geometry with respect to Material, Count, Speed etc., will help us

to achieve the lesser End Breaks.

• Ratio of ring Diameter (D) to tube diameter (d) should be 2:1

• 5:1 would be an ideal ratio in between Tube length to ring diameter.

• The spinning Triangle should be optimum.*Spinning geometry details are given page no.7

Disturbances in Traveller Movement

Improper Ring Race Way

• Smoothness

you go for higher speeds. Traveller lag will be more when the race way is having

pitting marks, rust or damages. End breaks have a direct co-relation on traveller

lag. More the traveller lag more is the end breaks. Traveller lag is the difference

between the spindle speed and traveller speed.

of ring race way is a critical factor, which is main limiting factor when

• Smoothening the Ring Race way can be done by doing Short Running in.

• Changing the damaged rings will help to reduce the end breaks.

Spinning performance can be affected by fibre fly, damaged lappet hooks,

ABC Rings, plastic tubes etc.,

Fibre fly can be arrested by

• Proper house keeping.

• Maintaining lesser short fibre content in back process.

• Frequent cleaning of under winding coil especially in auto doffing.

• Proper doffing practice.

• Plastic separator's bottom position has to be covered by metal to avoid fibre hanging.

MORE YARN BREAKS IN RING SPINNING

17

Multiple Breaks will occur when

• Traveller is too light.

• Separator is damaged.

• Uncleared Lappet hook Flycatcher.

• Poor House keeping.

• Damaged Lappet hook, Plastic tubes and Anti balloon Rings has to be replaced. It

also has to be centered and aligned properly.

• Higher length tubes will touch the yarn at bottom stage, which will create end

breaks and Hairiness.

Capability of Ring Frame in achieving the given spindle speed

• Improper combination of ring dia and lift.

• Improper ring traveller combination.

• Perfect combination of ring travellers will improve the working performance.

• For specific issues, our application engineers are always available.

• Gradual Increase in speed.

• New Generation rings, Travellers and spindles can be tried to achieve higher

speeds. This will help to achieve lesser Friction which indeed lesser heat dissipation.

Proper selection and Maintenance of Drafting Zone

• Top roller Damages and bottom Improper Suction will create roller lapping.

• Roller lapping will occur because of

• Fibre quality

• Room climate

• Improper clearer rollers

• Damaged aprons

• Drafting zone setting has to be optimized based on the length of fibres.

• If amount of draft is too high, it has to be controlled. Necessary roving hank has

to be changed.

18

Traveller fly can occur due to the following reasons

1. Reduced flange width of the ring

2. If Ring Traveller used is too light

a.Ring Traveller contact area is close to the toe portion of the traveller.

Hence traveller fly occurs.

b.Improper weight to the spinning tension.

3. Ring Traveller contact area is very small (Point Contact). This leads to

extreme wear out and finally the traveller breaks and flies.

4. If the setting between Traveller clearer and Traveller is too close, the

traveller will hit the clearer & fly.

Traveller clearer setting should be 0.2 to 0.3 mm between Traveller-to-

Traveller Clearer.

5. Cop content is more than recommended

6. Lesser winding length results in faster movement of ring rails. Hence

there is a chance of Traveller fly.

Increase the winding length with respect to count and spindle speed.

7. If the Center of gravity is higher for the required speed, there is a chance

that Traveller has an unstable running. It leads to traveller fly.

Hence go for a low bow height traveller.

Traveller Fly

19

CHOICE OF RIGHT TRAVELLERS

General Recommendations

SMALLER RING DIAMETER ( FOR SAME LIFT)

• Small Balloon - Use Lighter Travellers

• When the ring Diameter is less, Balloon Diameter will be small. This leads to

more yarn tension, hence use lighter Travellers.

LARGER RING DIAMETER ( FOR SAME LIFT)

• Larger Balloon - Use Heavier Travellers

• When the ring Diameter is high, Balloon diameter will be more. This leads to

less yarn tension and Balloon touches the separator, hence use heavier

Travellers.

SHORT TUBE LENGTH (FOR SAME RING DIA)

• Short Balloon Length - Use Lighter Travellers

• When the tube length is short, the yarn tension will be more, hence use

Travellers.

lighter

LONG TUBE LENGTH ( FOR SAME RING DIA)

• Longer Balloon Length - Use Heavier Travellers

• When the tube length is long, the yarn tension will be less, hence use

Travellers.

Heavier

FOR BETTER FIBRE LUBRICATION (COTTON)

• Use Heavier Travellers

• When the yarn contact area and ring contact area in Travellers is closer,

F ibre Lubr icat ion i s better espec ia l l y in cotton, hence use heav ier

Travellers.

20

FOR HIGHER SPINDLE SPEEDS

• Use Lighter Travellers

• For Higher Speeds Lighter Travellers give lesser yarn tension

• Low Bow Height Travellers with adequate yarn clearance.

• The center of gravity should be as low as possible for stable running of

Traveller. For this, use low bow height Travellers.

FOR NEW RINGS


• To avoid end breakages by reducing the yarn tension, use lighter Travellers.

FOR OLDER RINGS


• To avoid Bigger Balloon, use Heavier Travellers

FOR LESSER YARN HAIRINESS


• Heavier Travellers

yarn surface.

will helps to avoid fibres coming out to the

FOR BETTER YARN ELONGATION


• When using Lighter Travellers, yarn stretch will be less. It helps for better

elongation.

yarn

FOR RUNNING - IN

• Use Only Non-coated Travellers

• During Running - in the end Breakage should be kept to a minimum.

21

LRT Quickfix Advantage

Quicker & easier setting of Traveller

No Traveller deformation

Reduced danger of damage of Ring surface

Lower ends down rate

Reduced idling time for machines

Complete elimination of Traveller Losses

LRT Quickfix schedule of types

LRT QUICKFIX

16/0 - 8

2222

LRT EXTRACT

LRT Extract Advantage100% Collection of Travellers withoutspilling on the floor

No damage to the Ring surface

Quick removal of Travellers

No strain for fingers

2223

Light weight

Ergonomically designed handle

for easy handling

Increased RPM

Serrations in the plastic tip for

better fluff removal

Dynamically Balanced

Made of wear resistance material

for longer life

FLUFF REMOVER - FR1

Advantages

2224

Light weight

Ergonomically designed handle

for easy handling

Increased RPM

Serrations in the plastic tip for

better fluff removal

Dynamically Balanced

Made of wear resistance material

for longer life

FLUFF REMOVER - FR2

Advantages

252225

SPINNING WITH FLANGE TRAVELLERS

Relationship of yarn count to Traveller number

Yarn CountSynthetics & Blends

Traveller Number

Cotton

Ne TEX Nm Traveller No. Traveller Wt. Traveller No. Traveller Wt.

8 73.8 14 10-14 160-250 12-16 200-280

12 49.2 20 6-9 100-140 8-11 125-180

18 32.8 30 2-6 71-100 5-8 95-125

20 29.5 34 2/0-3 50-80 4-7 90-112

24 24.6 41 3/0-2 45-71 1-4 63-90

30 19.7 51 5/0-1/0 35.5-56 2/0-2 50-71

34 17.4 58 6/0-2/0 31.5-50 3/0-1 45-63

40 14.8 68 9/0-5/0 23.6-35.5 7/0-3/0 28-45

45 13.1 76 11/0-8/0 20-25 9/0-6/0 23.6-31.5

55 10.7 93 13/0-9/0 17-23.6 11/0-7/0 20-28

60 9.8 102 14/0-10/0 16-22.4 12/0-8/0 18-25

70 8.4 119 16/0-12/0 14-18 14/0-10/0 16-22.4

80 7.4 135 18/0-14/0 12.5-16 16/0-12/0 14-18

90 6.6 152 20/0 10-14

100 5.9 169 22/0-18/0 9-12.5

120 4.9 203 26/0-22/0 7.1-9

26

TWISTING / DOUBLING WITH FLANGE TRAVELLERS

Relationship of ply yarn count to Traveller number

Single Yarn Count 2 - ply 3 - ply 4 - ply

27

TRAVELLER WEIGHT COMPARISON TABLE*

* Subject to change based on Manufacturer Recommendation

Kanai Kanai

Traveller weight per 1000 Travellers in gram

6.3

7.1

8

9

10

11.2

12.5

13.2

14

15

16

17

18

20

22.4

23.6

25

28

31.5

35.5

40

45

50

56

63

71

80

28/0

26/0

24/0

22/0

20/0

19/0

18/0

17/0

16/0

15/0

14/0

13/0

12/0

11/0

10/0

9/0

8/0

7/0

6/0

5/0

4/0

3/0

2/0

1/0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

90

95

100

112

125

140

160

180

200

224

250

265

280

300

315

335

355

375

400

425

450

475

Traveller

No.

Lakshmi

/ Bracker

Traveller

No.

Lakshmi

/ Bracker

6.7

8.1

9.5

10.9

12.3

13.0

13.7

14.5

15.4

16.6

18.3

20.0

21.6

23.4

24.8

26.8

25.5

30.2

32.2

35.1

39.3

42.2

48.3

54.6

62.2

74

81

5

6

7.1

8

9

10

11.2

12.8

13.2

14.5

16

17

18

19

20

22.4

23.6

26.5

30

31.5

35.5

40

45

50

60

71

80

R & F R & FCARTER CARTER

1.6

4.8

8.1

11.3

14.6

16.2

17.8

19.4

21.1

22.7

24.3

22.5

27.5

29.2

30.8

32.8

34.0

35.6

38.9

42.1

45.4

48.6

51.8

58.3

64.8

71.3

77.8

89

95

109

122

136

154

175

204

224

244

264

283

280

311

324

335

355

364

378

391

404

400

431

444

457

472

485

85

95

106

112

125

140

160

180

200

224

236

250

265

280

300

315

325

335

355

375

385

415

425

450

460

475

84.2

90.7

103.7

116.6

129.6

149.0

168.5

194.4

213.8

233.3

252.7

272

285.1

298.1

311.0

324.0

337.0

350.0

362.9

375.8

388.8

401.8

414.7

427.7

440.6

453.6

466.6

28

NUMBERING SYSTEMS FOR YARN

Yarn count comparison chart (rounded figures)

TEX DENIERENGLISH

COUNT (Ne)

WOOLEN

(Ne)

METRIC

COUNT (Nm)

6

7

8

9

10

11

12

13

14

17

18

19

20

24

26

28

30

36

40

48

50

55

60

65

70

80

90

100

110

120

150

180

20

23

26

30

33

36

39

43

46

56

59

62

66

79

85

92

98

118

131

157

164

180

197

213

230

262

10

12

14

15

17

19

20

22

24

29

30

32

34

41

44

47

51

61

68

82

85

93

102

110

119

135

152

169

186

203

254

305

98

84

74

66

59

54

49

45

42

35

33

31

30

25

23

21

20

16

15

12

12

11

10

9

8

7

7

6

5

5

4

3

885

759

664

590

531

483

443

408

379

312

295

279

266

221

204

190

177

148

133

111

106

97

89

82

76

66

59

53

48

44

35

30

29

NUMBERING SYSTEMS FOR YARN - CONVERSION FORMULA

Direct system

Mass per Unit Length

i.e. No. of mass units in length of the yarn

Denier : - No. of gram units in 9000 meter of yarn

Tex : No. of gram units in 1000 meter of yarn.

Conversion formula

Indirect system

Length per Unit Mass

i.e. No. of length units in unit mass

Ne : No. of 840 yards in 1 lb yarn

Nm : No. of 1000 mts. In 1 kg yarn.

30

TRAVELLER SPEEDS / PERFORMANCE CALCULATIONS

Performance calculations

TRAVELLER SPEEDS/PERFORMANCE CALCULATIONS

3131

Blow Room

Cleaning efficiency % in Blow room

General Calculations*

Draw Frame

Production per delivery per 8 hours shift

= 0.625 x front roller speed in mpm x Machine Efficiency (%)

Simplex

Production per spindle per 8 hours in kgs

Spinning

Production per spindle per 8 hours in gms

Ring Doubling


100

Resultant Count = Single yarn count

No. of Ply

Two for one Twister


7.2 x Spindle Speed x 2 x Machine Efficiency

TPI x Resultant Count x 100

7.2 x Spindle Speed x Machine Efficiency (%)

TPI x Roving Hank x 100000


TPI x Count x 100


TPI x Resultant Count x 100

% trash in cottonX 100

% trash in cotton - % trash in lap

32

Cop Content Calculation

Standards to be maintained in mills

Illumination levels required in LUX

Relative Humidity and Temperature for Different Departments**

(Cotton Spinning)

** About 5% higher RH% than that for cotton spinning is to be maintained while spinning blended yarns.

C - Centigrade F - Fahrenheit* Source - Sitra norms 2004

1. a. Yarn content per cop in Ring Spinning for given spindle lift and Ring Diameter.

23.25 x L x D gramsL = Lift in InchesD = Ring Diameter in inches

b. The yarn content for man made fibres and blended yarns are roughly 8% more than those for cotton yarns for comparable spindle lifts & ring diameters.

2. Silver content per can in Draw frames:

2 1.5 x can height x can diameter

1000

23. Roving content in Kgs. = 3 x L x D

1000L = Lift in inches D = Full Bobbin Diameter in inches

Department Good Average Poor

Blow room, Humidification plants 50 40 <25and packing

Preparatory 70 50 <40

Spinning, Doubling and TFO 100 75 <60

Post Spinning and Inspection room 150 100 <60

0 0Department R.H.% C F

Mixing 60-50 27-35 80-95

Blow room Carding Preparatory 50-55 27-35 80-95

Ring Frame 50-60 27-35 80-95

Winding 60-65 27-32 80-90

Can Measurements in inches

33

HO(DR

* C2 Traveller are supplied in only flat cross section. U1CL UDR for compact spinning

You may select the Traveller number / type as per your mill conditions. For assistance, please contact LRT

NOTE: Guidelines for Traveller selection are specified based on our experience.

) for synthetic fibers and blends. HWO(UDR) for cotton, synthetic and blends.

RING TRAVELLER RECOMMENDATIONS

U1 C1

U1 C1

EM1/EP1/U1 UM/U1 ML/U1 C!

EM1/EP1/U1 UM/U1 ML/U1C1

EM1/U1 UM/U1 ML

EM1/U1 UM/U1 ML

EM1/U1 UM/U1 ML/EL1

EM1/U1 UM/U1 ML/EL1

EM1/U1 UM/U1 ML/EL1

EL1/U1 UL

EL1/U1 UL

EL1/U1 UL

EL1/U1 UL

EL1/U1 UL

EL1/U1 UL

- -

U1 C1U1 C1U1 C1U1 C1

M1/P1/U1 UM/U1 ML/U! C!

M1/P1/U1 UM/U1 ML/U1C1

M1/U1 UM/U1 ML

M1/U1 UM/U1 ML

M1/U1 UM/U1 ML/L1

M1/U1 UM/U1 ML/L1

M1/U1 UM/U1 ML/L1

L1/U1 UL

L1/U1 UL

L1/U1 UL

L1/U1 UL

L1/U1 UL

L1/U1 UL

Count

NE

Traveller

Number

FLANGE 1 FLANGE 2

Normal CR/AW Normal CR/AW

*C2/EH2/EP2

*C2/EH2/EP2

*C2/EH2/EP2

EH2/EP2/U2 UM

EM2/EH2/U2 UM

EM2/U2 UM

-

-

-

-

-

-

-

-

-

-

*C2/H2/P2

*C2/H2/P2

*C2/H2/P2

H2/P2/U2 UM

M2/H2/U2 UM

M2/U2 UM

-

-

-

-

-

-

-

-

-

-

8

12

18

20

24

30

34

40

45

55

60

70

80

90

100

120

10 - 14

6 - 9

2 - 6

2/0 - 3

3/0 - 2

5/0 - 1/0

6/0 - 2/0

9/0 - 5/0

11/0 - 8/0

13/0 - 9/0

14/0 - 10/0

16/0 - 12/0

18/0 - 14/0

20/0 - 16/0

22/0 - 18/0

26/0 - 22/0

TRAVELLER SELECTION FOR COTTON :

TRAVELLER SELECTION FOR SYNTHETICS

-

M1/P1/U1 UM



M1/U1 UM/U1 ML/U1C1

M1/U1 UM/U1 ML

M1/U1 UM/U1 ML

M1/U1 UM/U1 ML

M1/U1 UM/U1 ML

M1/U1 UM

L1/U1 UL

L1/U1 UL

-

EM1/EP1/U1 UM



EM1/U1 UM/U1 ML/U1C1

EM1/U1 UM/U1 ML

EM1/U1 UM/U1 ML

EM1/U1 UM/U1 ML

EM1/U1 UM/U1 ML

EM1/U1 UM

EL1/U1 UL

EL1/U1 UL

Count

NE

Traveller

Number

FLANGE 1 FLANGE 2

Normal CR/AW Normal CR/AW

*C2/EH2/EP2

*C2/EH2/EP2

*C2/EH2/EP2

EH2/EP2/U2 UM

EM2/EH2/U2 UM

EM2/U2 UM

-

-

-

-

-

-

-

*C2/H2/P2

*C2/H2/P2

*C2/H2/P2

H2/P2/U2 UM

M2/H2/U2 UM

M2/U2 UM

-

-

-

-

-

-

-

8

12

18

20

24

30

34

40

45

55

60

70

80

12 - 16

8 - 11

5 - 8

4 - 7

1 - 4

2/0 - 2

3/0 - 1

7/0 - 3/0

9/0 - 6/0

11/0 - 7/0

12/0 - 8/0

14/0 - 10/0

16/0 - 12/0

U1 C1U1 C1

34

J SHAPED VERTICAL RING TRAVELLER

J - SHAPED TRAVELLERS

Vertical Travellers are being used to spin acrylics, worsted, woolen and heavy

doubling on vertical rings.

Presently two types of Vertical rings are available.

1. Conical rings

2. Vertical rings

Based on the ring profile and ring Height the Traveller will be selected.

LRT is supplying Ring Travellers for the ring heights of 9.1 mm

and 11.1 mm.

PARTS OF J SHAPED RINGS AND TRAVELLERS

0

0

0

0

0

0

0

0

0

1. Nose

2. Head


4. Back

5. Heel

6. Foot

7. Toe

8. Inner height

9. Head width

10. Foot width

11. Nose angle

12. Toe angle

35

Traveller Contact And Its Impact On Traveller Wear out

FORCES ON RINGS - J SHAPED TRAVELLER

G - Traveller center of gravity

TT- yarn tension

R - resultant of the yarn tension

Fc - centrifugal force acting on the Traveller (resultant of Fn +Fd)

Fn - normal force, which presses the Traveller against the raceway

Fd - reacting force, which pulls the Traveller downwards

Worn-out Position Traveller weight Suggestions

36

RING TRAVELLER TYPES - J SHAPED TRAVELLER

Round wire section

For processing wool and synthetics.

Traveller

Back

Recommended

Ring raceway

Application

Range

Ring Depth

in mm (inch)Type

37

WEIGHT CHART OF J SHAPED RING TRAVELLERS

TRAVELLER RECOMMENDATION - J SHAPED TRAVELLER

Traveller Weight for 1000 pcs

Nm Ne (worsted) Trav. Wt. Lakshmi no.

ISO No.Lakshmi /

BrackerR + F Eadie Kanai

18

19

20

21

22

23

24

25

26

27

28

29

30

31

355

250

180

160

125

112

90

71

63

50

40

31.5

28

25

355

250

180

150

132

112

90

75

60

50

40

33.5

30

26.5

355

250

170

140

125

118

95

75

63

50

40

33

28

25

240

210

180

150

135

120

105

90

75

68

61

54

47

40

17 450 450 450 270

16 560 560 300

32 23.6 23.6 36

33 22.4 22.4 32

34 21.2 21.2 28

35 20 20 24

36 18 18 20

38

LAKSHMI RING TRAVELLERS (COIMBATORE) LIMITED

Regd. Office : 34-A, Kamaraj Road

Coimbatore - 641 018. India.

Phone : 0422 - 2223791, 2223792, 2223793

Fax : 0422 - 2223790

E-mail : [email protected]

Website : www.lrtindia.com

[ ]

SPINNING QUALITY - WORLD WIDE

W O R L D W I D E

39

40

Name;

Company

Designation

IMPORTANT NOTES

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