Question 47 (Textile Technology & Fibre Science)
An eight head comber is running at 400 nips/min. The lap fed is 60 kilotex and noil extracted is 20%. If the feed/nip is 7 mm, then with machine utilization of 80%, the production rate (in kg/h), accurate to one decimal place, is __51.0 to 52.0__.
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Given in the question:
Number of heads in comber=8
Comber running speed=400 nips/min
Linear density of feed lap=60 kilotex
=60 gm/meter
Noil%=20%
Feed/nips=7 mm
Feed/nips=7 x 10-3 meter
Machine utilization=80%
Production rate(kg/hr)=?
Calculation–
Comber production rate(kg/hr)=No. of comber heads x Nips/min x feed/nips x gram/meter x (1-(Noil%/100)) x machine utilization% x 60/1000 x100
Comber production rate(kg/hr)=8 x 400 x 7 x10-3 x 60 x (1-20/100) x 80 x 60/100000
Comber production rate(kg/hr)=8 x 400 x 7 x10-3 x 60 x (1-0.2) x 80 x 60/100000
Comber production rate(kg/hr)=8 x 400 x 7 x10-3 x 60 x 0.8 x 80 x 60/100000
Comber production rate(kg/hr)=8 x4 x 7 x 6 x 0.8 x 8 x 6 x 100/100000
Comber production rate(kg/hr)=51.6 (Answer)