Carding/Drawing/Speedframe/Spinning/Winding

Basic formulas used in Spinning process

GMT 10:56 2015 Saturday ,29 August

Sriyadithatextile - Basic formulas used in Spinning process

Spinning preparatory process
TFA

Basic formulas used in the Spinning process

 

Common Formulas

 

Grams per Meter 0.5905 / Ne
Grams per Yard 0.54 / Ne
Tex den x .11 = 1000/Nm = Mic/25.4
Ne Nm/1.693
DRAFT (feed weight in g/m) / (delivery weight in g/m)
DRAFT Tex (feed)/Tex(delivery)
DRAFT delivery roll surface speed/feed roll surface speed
   

 

Carding

 

Production in kgs / hr ( L x 1.0936 x 60 x effy ) / (hank (Ne) x 36 x 840 x 2.2045)

L - delivery speed in m/min
effy- efficiency
Ne - English count ( number of 840 yards in one pound)
840 - constant
2.2045- to convert from lbs to kilograms

Production in kgs / hr (L x Ktex x 60 x effy) / ( 1000 )

L - delivery speed in m/min
Ktex- sliver count in Ktex (kilotex)
effy - efficiency
1000- to convert to kilograms from grams

Production in kgs / 8 hrs (0.2836 x L x effy) / (Ne)

L - delivery speed in m/min
effy - efficiency
Ne - English count

Production / 8 hrs (Hank x Nd) /( Ne x 2.2045)

Hank = no of hank (840 yards)delivered by the machine
Nd = no of deliveries
Ne = hank of the material

Total draft in card (feed weight in g/m) / (sliver weight in g/m)

 

Drawframe

 

Break draft surface speed of 2nd roller / surface speed of back roller
Main draft surface speed of 1st roller / surface speed of 2nd( middle) roller
Total draft surface speed of delivery roller / surface of feed roller
Production in kgs / 8 hrs (0.2836 x L x effy x Nd) / (Ne)

L - delivery speed in m/min
effy - efficiency
Ne - english count
Nd - No of delvieries

Production in kgs / hr (FRD x FRrpm x 3.14 x 60 x effy x Nd) / (Ne x 840 x 36 x 2.2045)

FRD - front roller dia in inches
FRrpm - front roller rpm
effy - efficiency
Ne - Sliver hank
Nd - number of deliveries

 

Speedframe & Ringframe

 

Twist / Inch (TPI) Spindle speed / FRS

FRS - front roller surface speed in inches/mi

FRS = FRrpm x 3.14 x FRD FRS - Front roller surface speed

FRD - front roller diamete

T.P.I T.M. x sqrt(count or hank)

T.M. - Twist multiplier
sqrt - square root

Production in kgs / 8 hrs (7.2 x SS x effy) / (TPI x Ne x 1000)

SS - spindle speed

Spindle speed m/min x TPI x 39.37
Hank delivered spindle speed / ( tpi x 62.89)
Ring traveller speed in m/sec (spindle speed x ring dia in mm x 3.14) / (60 x 1000)

 

Winding

 

Production in kgs / 8 hrs (0.2836 x L x effy x Nd) / (Ne)

L - delivery speed in m/min
effy - efficiency
Ne - english count
Nd - No of delvieries

Production in kgs / hr ( L x 1.0936 x 60 x effy ) / (hank (Ne) x 36 x 840 x 2.2045)

L - delivery speed in m/min
effy- efficiency
Ne - English count ( number of 840 yards in one pound)
840 - constant
2.2045- to convert from lbs to kilograms

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