Spinning Calculation

Spinning Calculation2008

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 lbsConversion 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 yardsMoisture 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% 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 + WBBlow 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 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 frameUnilap Section Production(lbs/hr) = delivery rate(yd/min) * lap weight(grains/yd) *60 *1.0936 * 7000 Note = 1 penny = 24 grains/ydComber 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 headsSimplex 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 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/cRing 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

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 * 9.61Some 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

Department of Textile Engineering (BUITEMS, Quetta)