Spinning standards for mill planning


Spinning table

Staple length

In inch

Lap weight oz/yd

Spinnability (warp) Ne

Lap hank oz/yd

7/8

16

<20

0.00119

7/8 to 15/16

15

20-30

0.00126

15/16 to 1

14

30-40

0.00136

1 to 1(1/8)

13

40-50

0.00146

1(1/8) to 1 (1/4)

12

50-60

0.00158

1 (1/4) to 1(1/3-/8)

11

60-70

0.00173

1(1/3-/8) to 1(1/2)

10

70-80

0.00190

1(1/2) to 1(9/16)

9

80-100

0.00211

Sliver weight and sliver hank table

Count

Sliver weight

Sliver hank

Sliver weight

Grains/yd

g/yd(ktex)

Ne

g/yd

Upto 15

65

4.60

0.1284

4.21

15-20

65

4.60

0.1284

4.21

20-30

60

4.24

0.1392

3.88

30-50

55

3.89

0.1518

3.56

50-70

50

3.54

0.1668

3.24

70-90

45

3.19

0.2022

3.92

90-120

35-40

2.48 to2.83

0.260-0.2279

2.27-2.59

TM values for various staples:

If the staple length of fibre is 7/8” than TM value would be 4.75 and if staple length increases by 1/16” than TM value goes down by 0.1.

 

Machine its draft, doubling and waste%

Machine

Draft

Doubling

Waste%

Blow room

According to the count to be spun

Card

90-120

According to the count and between 3.5-5.5%

Draw frame

6-8

6-8

0.5

Lap former

1.2-1.7

16-24

0.5

Super lap former

2-5

24-60

0.5

Sliver lap

1.3-1.7

16-24

0.5

Ribbon lap

6

6

0.5

Comber

Old 40-70

New 40-90

6

4

<6 scratch comb

6-10 semi comb

10-18 regular comb

18-25 double comb

Simplex

8-12

If required 2

0.5

Slubber

3-5

0.5

Inter

4-6

0.5

Roving

5-8

If required 2

0.5

Ring frame

Conv.

10-20

2

Modern

20-50

2

Rotor

Conv.

100-150

2-3

Modern

100-250

2-3

Winding

1

M/c and its production capacity in terms of speed

1. Blow room

Production capacity in terms of speed Efficiency %
With chut feed system= 300-500 Kg 90
With 2 scutcher per blow room line and lap roll dia. 10” and rpm 7(+/-)1. The production varies from 180-240 Kg/hr/line 90

2. Card

Production capacity in terms of speed
Type Doffer rpm Efficiency
Conv. 5-15 90-92%
SHP 10-20 90-92%
HP 20-40 90-92%
VHP 40-120 90-92%

3. Draw frame

Production capacity in terms of speed
Type Efficiency No of delivery Mpm
Conv. 70-75% 4 20-30
SHP 70-75% 3 200
HP 70-75% 2 250-500
VHP 70-75% 1 750-1000

4. Lap former and super lap former

Delivery speed-50-70 mpm

Efficiency-70-75%

5. Comber

Feed per nip- 3.5 to 7mm

Type Neps/min No of heads No of delivery Efficiency
Conv. 60-70 6 1 90
HP 15-225 8 2 90
VHP Upto 400 8 2 90

6. Speed frame

Type Spindle speed No of spindles Efficiency
Slubber 500-550 72 85
Inter 55-600 138 85
Roving 600-1000 168 90
Simplex 1200-1500 132 85

7. Ring frame

Ring dia Count Spindle rpm Efficiency
50 <20 12000 90
45 20-40 13500 90
42 40-60 14500 90
42 60-80 15500 90
38 >80 16500 90
TM values for speed frame
machine Staple length
7/8” 1” 1 (1/4)” 1(1/2)”
Slubber 1.2 1 0.95 0.7-0.8
Inter/simplex 1.2 1.1 0.95 0.7-0.8
Roving 1.2 1 0.8-.9
The value for PET and VR for length of sliver and devices 2 or 3 is 0.6

8. Winding machine specification

Delivery rate 1000-2000 mpm

Efficiency- 90%

No. Of spindle- 60

Maintenance allounce
machine % maintenance allounce
Blow room
Card 10% of total no of cards
DF
LF
Comber
Simplex
RF 2% on number of spindle
Rotor -do-

9. Rotor specification

Rotor rpm 80000-100000 rpm

Efficiency- 90%

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