Spinning Calculation 2008
Department of Textile Engineering (BUITEMS, Quetta)
Conversion of Weight units
1kg = 2.2046 lbs
1kg = 1000 grams
1gm = 15.432 grains
1lbs = 453.6 grams
1lbs = 16 oz
1lbs = 7000 grains
1grain = 0.0029 oz
1oz = 437.50 grains
1penny = 24 grains
1ton = 2204.6 lbs
1bundle = 10 lbs
1bag = 100 lbs
1mund = 40 kg
1mund = 88.18 lbs
Conversion of length units
1m = 1.0936 yards
1m = 39.37 inches
1m = 100 cm
1m = 1000 mm
1cm = 10 mm
1yard = 36 inches
1yard = 0.9144 meter
1yard = 91.44 cm
1ft = 12 cm
1ft = 30.48 mm
1hank = 840 yards
Moisture Relation for Textile Materials
M.R = w/D*100
M.C = w/w+D*100 = w/W*100
M = R/(1+R/100)
C.C.W = D * (100+R/100)
D = C.C.W *(100/100+R%)
C.C.W = D+R%
Spinning Calculation 2008
Department of Textile Engineering (BUITEMS, Quetta)
C.C.W = D+(D*R/100)
Dm )
Volume of air = area (feet sq) * liner speed (ft/min)
Pm = CA + CB/WA + WB = PAWA + PAWB/WA + WB
Blow Room & Carding Section
Cleaning Efficiency = trash removed/total trash fed *100
Efficiency = tr/tf * 100 = tf-tr/tf * 100
Waste = trash + lint
Waste Extracted = weight fed * waste%
Waste Extracted = weight fed weight delivered
Weight Delivered = weight fed - waste extracted
Weight Delivered = weight fed * (100 w/100)
Weight Fed = weight delivered * (100/100 w)
Lap length (directly proportional) lap change wheel
Lap length = lap length constant * lap length constant wheel
Beats/min = rpm of beater * number of strikers
Beats/inch = beats per minute/feeding rate (inches/min)
Beats Constant = beats/inch * rpm of paddle roller
Beats Constant = beat per minute/feeding rate
Efficiency = actual production/calculated production * 100
Actual production = calculated production * efficiency
Actual production = weight of lap(lbs) * number of lap/hr
M.D = s.s of shell roller/s.s of paddle roller
Production of B/R (lbs/hr) = production constant * N(shell roller rpm) * W(oz/yd)
Production of card (lbs/hr) = DN * 36 * 60 * 1 *
36 * 840 * count
Production of card (lbs/hr) = DN * 36 * 60 * (weight in ozs) * /36 * 16
No of scutchers required = feeding rate of cards/production of one scutchers
No of card required = production of blow room/feeding rate of card deptt
Production of card (lbs/hr) = delivery rate(m/min) * grain/yds * 1.0936 * 60 *
7000
Time to complete full card can = sliver length(yds)/delivery rate(yds/min)
No. of scutchers required = production of blow room/production of one scutchers
No. of card required = production of card section/production of one card
Tension Draft = s.speed of C.C.R/s.speed of Doffer
Total Lap weight = lap length * weight/yd
Spinning Calculation 2008
Department of Textile Engineering (BUITEMS, Quetta)
D(Trumpet guide) = 0.015625 * count *
Waste% age = input output * 100
Input
Draw frame Section
Actual Draft = weight/yd fed * No. of doublings
weight/yd delivered
Production(lbs/hr) = delivery rate(m/min) * 1.0936 * 60 * No. of deliveries/7000
Production(lbs/hr)(only for two deliveries)= delivery rate(m/min) * 0.45 *grains/yd *
Production(lbs/hr) = DN * 60 * tension draft *
36 * 840 * hank sliver
No. of Deliveries Required= feeding rate of simplex/production of finisher draw frame
Unilap Section
Production(lbs/hr) = delivery rate(yd/min) * lap weight(grains/yd) *60 *1.0936 *
7000
Note = 1 penny = 24 grains/yd
Comber Section
Production(lbs/hr) = L * F * N * H * (100 W) * 60 *
7000 * 36 * 100
Note
L = lap weight in grain/yd
F = feed rate in inches/min
N = nips/min
W = noil %age extracted
H = no of comber heads
Simplex Section
Feeding Rate = * D(dia of back roller) * Rpm(back roller)
Delivery Rate = * D(dia of front roller) * Rpm(front roller)
TPI = TM
TPI = spindle speed________________
Delivery rate or F.R delivery in inches/min
Production(lbs/hr) = front roll delivery * 60 * 1 *
36 * 840 * count
Production(lbs/hr) = flyer rpm * 60 * No. of spindles *
TPI * Hank roving * 36 * 840
Production(lbs/hr) = 5.7 * flyer rpm * (for 120 spindles m/c)
TPI * Hank roving
Spinning Calculation 2008
Department of Textile Engineering (BUITEMS, Quetta)
TPI = flyer speed______________
Delivery rate or F.R delivery in inches/min
CPM = front roll delivery(inches/min)
Bobbin circumference
CPI CPM_______________
Liner speed of bobbin rail(m/min)
CPI CPM
TCP(NEW) = TCP(old) * /
L.W = L.W(old) * /
B.W = B.W(old) * /
Roving Tension winding rate/delivery rate = (b f)D/l
Roving Tension = (b f)D/front roll delivery(inches per min)
Lifter Constant = CPI * lifter wheel
Turns per meter(TPM) = flyer rpm/delivery speed( meter per min)
Draft = count deliver/count fed
New DCP = old DCP * old draft/new draft
New DCP = old DCP * old count/new count
No. of Simplex required = production of finisher draw frame/feeding rate of one simplex
No. of Simplex required = total feeding rate of ring section/production of one simplex m/c
Ring Frame Sestion
Production(OPS) = spindle speed * 1 * 1 * 60 * 8 * 16 *
TPI 36 * 840 * count
Production(OPS) = DN * 60 *8 *16 *
36 * 840 * count
OPS from bags/day = total bags/total frame * No. of spindle per frame
No. of ring frame required = total production of simplex section/feeding rate of one ring frame
Traveler speed = spindle speed winding speed
Winding speed = front roll delivery(inches per min)/bobbin circumference
Traveler angle = bare bobbin dia/full bobbin dia
Linear speed of traveler(m/sec) = DN/1000 * 60 (where D is ring dia & N is spindle speed)
Auto Cone Section
Cone Length(meters) = count * cone weight(lbs) * 840/1.0936
Production(lbs/hr) = delivery rate(m per min) * No. of spindles * 60 * 1.0936 * /840
Production per spindle(lbs/hr) = * Dia of Drum * Drum RPM * 60 *
36 * 840 * count
Spinning Calculation 2008
Department of Textile Engineering (BUITEMS, Quetta)
Open End
Production/Rotor(gm/hr) = 0.0006 * N * tex * /T.F (where N is Rotor Speed)
Production/Rotor(lbs/hr) = 0.0019 * N * /T.M * (count)
T.F = T.M * 9.61
Some Other Relations
A.D = M.D * 100/(100 W%)
A.D = count delivered/ count fed
A.D = weight fed/weight delivered
Waste% = (A.D M.D) * 100/A.D
M.D = A.D * (100 W%)/100
M.D = s.s of delivery roll * Driver gear
s.s of feed roll * Driven gear
M.D = s.s of delivery roll
s.s of feed roll
Condensation Factor = s.s of cylinder
s.s of doffer
Density = mass/volume
590.5 = tex * count
Yarn Diameter = k/ (Where k is Constant)
M.Yasir Ali Khan.
05-TE-08
