Spinning Calculations – Blowroom and Carding

Mar 26, 2016 |

Blowroom and Carding Calculations

1. Cleaning Efficiency = trash removed/total trash fed *100

2. Efficiency = tr/tf * 100 = tf-tr/tf * 100

3. Waste = trash + lint

4. Waste Extracted = weight fed * waste%

5. Waste Extracted = weight fed – weight delivered

6. Weight Delivered = weight fed – waste extracted

7. Weight Delivered = weight fed * (100 – w/100)

8. Weight Fed = weight delivered * (100/100 – w)

9. Lap length (directly proportional) lap change wheel

10. Lap length = lap length constant * lap length constant wheel

11. Beats/min = rpm of beater * number of strikers

12. Beats/inch = beats per minute/feeding rate (inches/min)

13. Beats Constant = beats/inch * rpm of paddle roller

14. Beats Constant = beat per minute/feeding rate

15. Efficiency = actual production/calculated production * 100

16. Actual production = calculated production * efficiency

17. Actual production = weight of lap(lbs) * number of lap/hr

18. M.D = s.s of shell roller/s.s of paddle roller

19. Production of B/R (lbs/hr) = production constant * N(shell roller rpm) * W(oz/yd)

20. Production of card (lbs/hr) = πDN * 36 * 60 * 1 *ŋ / 36 * 840 * count

21. Production of card (lbs/hr) = πDN * 36 * 60 * (weight in ozs) * ŋ/36 * 16

22. No of scutchers required = feeding rate of cards/production of one scutchers

23. No of card required = production of blow room/feeding rate of card deptt

24. Production of card (lbs/hr) = delivery rate(m/min) * grain/yds * 1.0936 * 60 * ŋ/ 7000

25. Time to complete full card can = sliver length(yds)/delivery rate(yds/min)

26. No. of scutchers required = production of blow room/production of one scutchers

27. No. of card required = production of card section/production of one card

28. Tension Draft = s.speed of C.C.R/s.speed of Doffer

29. Total Lap weight = lap length * weight/yd

30. D(Trumpet guide) = 0.015625 * count * W

31. Waste% age = input – output * 100 / Input

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