Saturday, February 20, 2021

Yarn reeling process, objective of yarn reeling process, types of yarn reeling machine, common structure and working of yarn reeling process


Yarn reeling process ( cone to hank reeling machine)

Yarn reeling process:

The process of conversion of yarn from cone or cheese to hank is called the yarn reeling process.

Objectives of yarn reeling process:

The main objective of the yarn reeling process is to reduce yarn dyeing cost. How does the yarn dyeing cost reduce by the reeling process?

When the yarn reaches the fabric manufacturing unit, it is used to weave a fabric. The fabric specifications are used as per customer need. 

If a customer asks to weave woven stripe, checks and chambray fabrics, then the weaver needs to dye it in desired colour shade. 

The yarn is dyed by following two processes. The package dyeing is more costly because it requires a two-time winding process. The drying cost in package dyeing is also a big factor.

If the yarn is dyed in hank form, then the winding of the yarn is done one time only. Thus dyeing cost gets reduced. Most of the yarn dyer dry the yarn in sunlight so that drying cost gets cut in this process.

In this way, we can say that the main objective of the yarn reeling process is to reduce the yarn dyeing cost.

Types of yarn reeling machines:

The types of yarn reeling machines are given below:

1 - Single-end yarn reeling machine:

In this type of reeling machine, one hank or skein is prepared at one time. This machine is used in handloom and Textile testing laboratories. 

2 - Multi- end yarn reeling machine:

In this kind of yarn reeling machine, two or more two hanks ( skeins) are prepared. The productivity of these machines is very high. 

Types of reeling machines according to mechanism:

There are three types of yarn reeling machines according to machine mechanism:

1 - Manual yarn reeling machine:

In this kind of reeling machine, all machine operations take place manually.

2 - Power-driven yarn reeling machine:

In this kind of yarn reeling Machine, all operations are performed by electric power. There are two types of power-driven yarn reeling machines.

Semi-automatic yarn reeling machine: in this machine, the doffing of hanks of yarn is performed manually. Yarn length on hank can be varied from desired hank length. The hank yarn tension on the hexagon gets released manually.

Fully automatic yarn reeling machine: in this kind of yarn reeling machine, you can make a desired length of yarn on a hank. The hexagon comes out automatically with the help of hydraulic arms. The hank yarn tension on the hexagon releases automatically. The hexagon rests on two stands. The operator can take out the hank easily. Now the hexagon goes back on its brackets.

Common structure and working of yarn reeling machine:

The common structure of the yarn reeling machine is given below:

Yarn passage:

First of all the yarn from the package passes through the yarn guide. Now, yarn passes through the yarn traverse guide. Finally, the yarn goes over the hexagon.

The main frame of the reeling machine is made of iron channels. 

Hexagon B is made of good quality steel square pipes. Main shaft C is fitted in the centre of the hexagon throughout the length of the hexagon.

Main pulley D is fastened on one side of the main shaft. Second pulley E is also mounted at this end. Main pulley D is connected to the motor pulley G with the help of main-belt H. The second pulley E is connected to the third pulley J with the help of the second belt I. The one bevel gear is mounted on the third pulley shaft J. This bevel gear connects to another bevel gear. A worm shaft is connected to a second bevel gear. Worm L is mounted on the top of the worm shaft. This worm is connected to the worm wheel M. A connecting rod connects the yarn traverse guide one the pin mounted near the circumference of the worm wheel. Cone holder N is mounted in the bottom portion of the machine. The yarn package is mounted on this cone holder. P is a yarn guide that helps to guide the yarn in the correct direction during operation. Yarn traverse guides A is used to provide to and fro traversing motion to the yarn. Q is a yarn that gets wrapped on the hexagon.

When the motor rotates, the hexagon begins to rotate in an anti-clockwise direction. Hexagon drags the yarn attached with it. The yarn wrapping on the hexagon starts immediately. 

If yarn coils lay one over the other, the skein thickness in middle is increased. When this hank is unwound during package winding, the chances of yarn entanglement are increased highly. The complete hank may be damaged too. 

A yarn traverse guide help to maintain the thickness of the hank during reeling.

The second pulley mounted on the main shaft is connected to the third pulley with the help of a belt. When the second pulley rotates, the third pulley also starts to rotate. This third pulley transfers angular motion to the work shaft at the right angle. The worm is geared with a worm wheel. When the worm rotates, it transfers angular motion to the worm wheel at the right angle. The worm wheel begins to rotate. The worm wheel is freely connected to the yarn traverse guide with the help of connecting rod. When the worm wheel rotates, the yarn traverse guide travels from left to right and then right to left. This to and fro motion gets repeated continuously. This kind of movement of the yarn traverse guide imparts traversing motion to the yarn getting wrapped in the hexagon. In this way, even thickness of hank throughout the process gets resulted.

Please click on the below video link to watch the full topic in Hindi: 

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