SPINNING LEARNERS

HOW TO CALCULATE YARN DIAMETER     The diameter of  yarn can be calculated by 1divded 28 Square root of Count is called as Diameter of yarn in Per inch. Example :-      Count - 20s & 40s Formula:- 1/28 Square root of  Count = Diameter of inch 28Square root of  20 = 125.22 1/125.22 = 0.007986 Per inch 0.007986 x 25.4 = 0.203 So the diameter of yarn is 0.203 Formula:- 1/28 Square root of  Count = Diameter of inch 28Square root of  40 = 177.088 1/177.088 = 0.005647 Per inch 0.005647  x  25.4 = 0.203 So the diameter of yarn is 0.143 Then 1Divded 28 Square root of count why we apply Here?  

1. What is fiber? Ans:  Fiber or fiber is classes of materials that are continuous filaments or are in discrete elongated pieces, similar to lengths of thread. They are very important in the biology of both plants and animals, for holding tissues together. 2. What is textile fiber? Ans:   Textile fiber  has some characteristics which differ between fiber to Textile fiber. Textile fiber can be spun into a yarn or made into a fabric by various methods including weaving, knitting, braiding, felting, and twisting. The essential requirements for fibers to be spun into yarn include a length of at least 5 millimeters, flexibility, cohesiveness, and sufficient strength. Other important properties include elasticity, fineness, uniformity, durability, and luster. 3. What is yarn? Ans:  Yarn is a long continuous length of interlocked fibers, suitable for use in the production of textiles, sewing, crocheting, knitting, weaving, embroidery, and rope making. 4. Flow chart of Carde...

1. A fully mature fiber has a well-developed thick cell-wall (Yes/no) Ans.  Yes. 2. An immature fiber has a very thin cell-wall (Yes/no) Ans.  Yes. 3. In mature fiber, dye absorption is high (yes/no) Ans.  Yes 4. In immature fiber, dye absorption is low (yes/no) Ans.  Yes 5. What is staple length? Ans.  The average length of spinnable fiber is called staple length. 6. If staple length is increase then yarn quality is also increase (yes/no). Ans.  Yes 7. Toughness of fiber has a direct effect on yarn and fiber strength (yes/no) Ans.  Yes 8. If fiber strength is higher, then yarn and fabric strength is also higher (yes/ no) Ans.  Yes 9. Short fibers deteriorate the yarn strength and uniformity (true/false) Ans.  True. 10. What is the minimum strength for a textile fiber? Ans.  Approximately 6 CN/tex (about 6km breaking length) 11. What do you know about Presley index =? Ans.  Breaking load in Ibs/Bundle weight in mg. 12. What is fiber...

INTERVIEW QUESTIONS FRESHER:- What is Count ?      No. of 840yards in pounds is called as Count. What is Draft ?     Thinning down the material.     or      Delivery surface roller speed / Feed surface roller speed. What is TPI ?     How much Twist in yarn per inch, Twist per inch (TPI) What is TM ?     TM is a relationship between yarn number (count) and turns per inch in the yarn. Formula:- TM = TPI X Square root of Count Machine process flow chart of CARDED yarn ? Blow Room ↓ Carding ↓ Breaker Drawing ↓ Finisher Drawing ↓ Simplex ↓ Ring Frame ↓ Winding Machine process flow chart of COMBED yarn ? Blow Room ↓ Carding ↓ Breaker Drawing ↓ Lapformer ↓ Comber ↓ Finisher Drawing ↓ Simplex ↓ Ring Frame ↓ Winding What is SPINNING ?      Spinning is the process to convert Cotton to Yarn. What is the object of Blowroom ?      Opening and Cleaning, Removing Trash, Seed coat etc...  What is ...

Primary Responsibilities Of Quality Head 1.Totally responsible for the quality of Outgoing yarn 2.Responsible for timely communication to the top management on the quality of incoming raw materials 3.Design a proper QA schedule based on the requirements of the unit and its customer profile and to maintain it. 4.To develop and monitor a suitable organogram under him. 5.Responsible for assessing waste levels at each stage and maintain YR at standard level Activities under primary responsibilities Quality of outgoing yarn Incoming material inspection(in-house or outside) In process material inspection Final product inspection Simulation studies(Rewinding studies/knitting fabrication/Tensojet studies) Quality Audits Process Audit(Process parameters/Channelization/Identification) Quality Audit Evaluation of Maintenance activities Rogue spindle analysis Buffing effectiveness Mango tube cleaning evaluation(compact) Yarn realization Mixing issue controls/consistency Performance evaluation of m...

Technical Spinning Information and Formulas :-   1) Constant  One pound is 7000 grains = 453.59 grams One skein is 120 yards = 109.7 meters One yard = 36 inches = 0.9144 meters One hank is 840 yards = 768.1 meters The yarn count and hank roving number equals the number of hanks in one pound. To find the hank roving number from number of grains per yard: Divide 8.33 by the number of grains per yard. Hank roving number = 8.33 x yard Grains   2) To find the speed of the front roll Divide the revolutions per minute of the spindle by the product of the twist per inch, multiplied by the circumference in inches of the front roll Front roll speed = S pindle R.P.M  diameter of front roll  x  T. P.I   3) To find the Spindle Speed Multiply the R.P.M. of the front roll by the twist per inch and this product by the circumference of the front roll. Spindle speed = FRS   x T.P.I x  X diameter of front roller   4) To find the standard twist per inch Mul...

LAPFORMER:-                  Lapformer is a machine preparing lap for next process called as Comber. The lap is produce by Breaker Drawing sliver, Is this limited number of slivers (16 to 32 Doublings)  Lapformer Manufacture company list:- RIETER LMW TRUTZSCHLER MARZOLI RIETER :-                     RIETER is the world leading Textile machine Supplier of system for manufacturing yarn from stable fibers in spinning mills Based in SWITZERLAND   Omega lap model in 2023 & 2024:-                     Rieter card guarantees gentle opening, Efficient cleanings and intensive blending of fibers. OMEGA E 36 LMW LAPFORMER:-                              LMW (LAKSHMI MACHINE WORKS LIMITED) is a leading machine manufacture in india. In 1962, LMW was founded to provide ind...