Winding:
The winding process can be defined as the transfer of spinning yarn from one package to another large package (cone, spool, pirn, etc). On the other hand, it can be defined as the transfer of yarn from ring bobbin, hanks, etc into a convenient form of a package containing a considerable long length of yarn. A process of accumulating yarn on a package to facilitate the next process is called wind. Different formulas of winding calculation with examples will be discussed in the followings:
Different Formulas of Winding Calculation with Examples
In the case of cotton,
Production Calculation of Winding (per hour) ,
………………surface speed of winding drum (yds/min) × 60
………………….× Number of drum × Efficiency × Waste
=…………………………………………………………………….……………………(Lbs/hr)
……………………………….840 × Yarn count
Or,
…………Quantity of yarn per spindle(yds/min) × 60
…………..× Number of spindle × Efficiency × Waste
=…………………………………………….………………..…….…………… (Lbs/hr)
…………………………840 × Yarn count
Or,
= Quantity of yarn per spindle(yds/min) × 60 × 8 × Number of the spindle (spindle)
Example:
Find out the production per 8hrs of an Auto cone winding machine from the following data:
Drum Speed: 2400 R.p.m
Dia of Drum: 3 Inch
Yarn Count: 30s
Efficiency: 68%
Solution:
Production/spindle/8hrs,
…………..surface speed of winding drum (yds/min)×
…………………60 ×8 × Number of drum × Efficiency
= ………………………………………………………………….……………………(Lbs/8hrs)
………………………..36 × 840 × Yarn count
….3.14 × 3 × 2400 × 60 × 8 × 68
= ……………………………………………. (Lbs/8hrs)
…………..36 × 840 × 30 × 100
= 8.13 (Lbs/8hrs)
So, Production/spindle/8hrs is 8.13lbs.
2. In the Case of Jute,
Production Calculation of Winding (per hour) ,
……………Surface speed of winding roller (inch/min) × 60
……………………× count × Number of spindle × Efficiency
= ………………………………………………………………………….………………… (lbs)
……………………………………..36 × 14400
Example:
Find out the production per shift of a Spool winding machine from the following data:
Number of spindles: 20
The surface speed of winding roller = 165 yds/min
Solution:
Production/spindle/shift,
………….The surface speed of winding roller (yds/min)
……………………× 60 × count × Number of spindle
=……………………………………………………………………………………… (spindle)
……………………………………….14400
…165 × 60 ×8 × 20
=…………………………… (spindle)
…………..14400
=110 (spindle)
So, Production/spindle/shift is 110
3. In the Case of Tex System,
Production Calculation of Winding (per hour) ,
……………..Surface speed of winding roller (cm/min) × 60
…………………× Count × Number of spindle × Efficiency
=…………………………………………………………………………..…………………(gm)
……………………………………..100 × 1000
Machine Efficiency,
……..Actual Production
= ………………………………… ×100
….Calculated Production
Example:
Find out the calculated production per shift of a winding machine from the following data:
Actual production: 90 spindle
Number of spindles: 20
Efficiency: 80%
Solution:
Calculated production per shift,
….Actual production
= …………………………
……….Efficiency
…90 × 100
= …………….
……..80
= 112.50 spindle
So, the Calculated production per shift is 112.50 spindle.
Author of this Article: Mayedul Islam Assistant Chemist Ha-Meem Group, Tongi, Gazipur, Bangladesh Email: [email protected]