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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