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Production Calculation of Ring Frame

Production Calculation of Ring Frame
S. M. Hossen Uzzal
Production Officer
Monno Fabrics Ltd., Manikgonj
Email: uhossen@gmail.com




Ring Frame:
Ring spinning machine or ring frame is used to produce required count of yarn from the supplied roving by the drafting. To insert sufficient amount of twist to the yarn. To wind the yarn onto the bobbin. To build the yarn package properly.
ring frame
Ring frame
Formula of Ring Frame Production:

                                                      Spindle Speed x 60 x 24 x Total no of Spindles
1. Ring Frame (100% Production) = ……………………………………………......
                                                             Count x TPI x 840 x 36 x 2.2046

2. Ring Frame (Actual Production) = 100% Production x Required Efficiency

                                                          Actual Production
3. Ring Frame (Required Input) = ………………..………
                                                       (100 – std waste)/100

4. Required TCP X Required TPI = Existing TCP X Existing TPI

5. TPI Calculation : TPI = TM √(Count) (TM= Twist Multifyer)

6. Traveler speed = spindle speed – winding speed

7. Winding speed = front roll delivery(inches per min)/bobbin circumference

8. Traveler angle = bare bobbin dia/full bobbin dia

Ring Frame Production Calculation:
1. In a ring frame 30 Ne carded yarn is to be spun in which spindle speed is 17000 r.p.m and there are 504 working spindles. If the machine runs at 9% efficiency and twist multiplier is 4.6 . Find out its production in lbs/shift.

Solution:

Given that,
  • No of working spindle = 504
  • Spindle speed 17000 r.p.m
  • Efficiency = 95%
  • Time of production = 8 hrs
  • Yarn count =30
  • T.M = 4.6
We know that, 
 
T.P.I = T.M X √(Count)

= 4.6 X √(30)

= 25.195

                                    Spindle r.p.m X 60 X 8 X No of spindle
Production per Shift = ………………………………………….... X Efficiency
                                             T.P.I X 36 X 840 X Count

     17000 X 60 X 8 X 504            95
= ……………………………  X ………
    25.195 X 36 X 840 X 30         100

= 170.93 lbs (Ans)


2. Find out the required T.C.P to produce 49 Ne carded woven yarn when twist multiplier is 4.6, existing T.C.P is 48T and existing T.P.I is 21.7

Solution:


Given that, 
  • Existing T.C.P = 48T
  • Existing T.P.I = 21.7
  • T.M = 4.6
  • Produced yarn count = 40 Ne
  • Required T.P.I = ?
We know that,

Required TCP X Required TPI = Existing TCP X Existing TPI    …………(1)

Again, we know,

Required T.P.I = T.M X √(Count)

= 4.6 X √(40)

= 29

From equation (1) we get,

Required T.C.P X 29 = 48 X 21.7

                            48X 21.7
Required T.C.P = …………
                                29
= 35.8

= 36 T (Ans)

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