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Transcript of Lrt Handbook
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
3. Position of yarn path
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
• Use Lighter Travellers
• To avoid end breakages by reducing the yarn tension, use lighter Travellers.
FOR OLDER RINGS
• Use Heavier Travellers
• To avoid Bigger Balloon, use Heavier Travellers
FOR LESSER YARN HAIRINESS
• Use Heavier Travellers
• Heavier Travellers
yarn surface.
will helps to avoid fibres coming out to the
FOR BETTER YARN ELONGATION
• Use Lighter Travellers
• 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
Production per spindle per 8 hours in gms
100
Resultant Count = Single yarn count
No. of Ply
Two for one Twister
Production per spindle per 8 hours in gms
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
7.2 x Spindle Speed x Machine Efficiency (%)
TPI x Count x 100
7.2 x Spindle Speed x Machine Efficiency (%)
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/P1/U1 UM/U1 ML/U1C1
M1/P1/U1 UM/U1 ML/U1C1
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/EP1/U1 UM/U1 ML/U1C1
EM1/EP1/U1 UM/U1 ML/U1C1
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
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
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