Yarn guides are the one of the helping instrument to control the yarn path. Yarn guides are required to perform the winding or unwinding process properly. In every operation where yarns are transferred from one package to another, yarn guides are required there. Yarn guides are used during winding, warping, beaming and weaving process.
In winding and unwinding it is necessary to control the yarn path. For side withdrawal it is possible for the yarn to pass along a smooth varying yarn path. But for over end withdrawal the yarn must be controlled by placing guides along the yarn path.
Yarn guides are normally made of hard smooth steel or ceramic. Different yarn guides are made by the yarn guide manufacturer. Yarn guides should be perfect in size otherwise winding process will be hampered. The yarn path should keep clean during withdrawal of the yarn. Yarn cleaner also placed along the yarn path.
Types of yarn guides: There are two types of yarn guides which are used during withdrawal or unwithdrawal of yarn. They are:
- A yarn end is required for threading: It takes extra time in threading. So, speed of operation is increased. The yarn experienced more friction. Shape of the yarn guides are may be as follow:
- Ceramic insert type
- Trumpet type
- Bush or roller type
- A yarn end is not required for threading: Threading is very easy. So, the speed of operation increased. The yarn experienced less friction. Shape of the yarn guides may be as follow:
- Pig tail
- Slotted type
- Post type
So, yarn guide plays an important role in winding operation. We should be careful during the selection of yarn guide.
Yarn is the final product of spinning process. Yarns may be carded, combed or rotor. Any types of yarn which is produced in spinning that may have some faults; it requires removing for getting better weaving efficiency. To perform this, a device is used that is called yarn cleaner.
Yarn cleaner: Yarn cleaner is the device which is used to remove the faults of yarn. Yarn cleaner is used to increase the yarn quality and weaving efficiency. Following yarn faults are removed by yarn cleaner.
- Thick and thin place in the yarn.
- Slubs and neps of yarn.
- Loose fibers of the yarn.
- Foreign materials of the yarn.
During operation it should ensure that the yarn cleaner is clean otherwise their contamination with dust may cause additional knots. So, we should keep clean the yarn cleaning device.
Types of yarn cleaner: There are different types of cleaning device which is used for clean the yarn. Followings are the most used yarn cleaning device.
- Ordinary metal sheet type
- Comb type
- Ordinary metal slit type
- Blade type
- Disc type
- Capacitance type
- Solar type
Use of yarn cleaner: The scope of yarn cleaner use is one of the most important factors. Yarn cleaner is used for the following cases.
- Before the pirn winding.
- Before the beaming of warp or weavers beam.
- Mounted on the winders behind the tension device.
So, yarn cleaning device is essential for remove unwanted faults or defects of yarn. Various textile machine manufacturing companies are produced yarn cleaning device. Choose your favorite one from there.
Winding is the process of transferring yarn from one spinning bobbin to another suitable package. Winding is classified in different ways. Depending on the density of the package; winding is classified as
- Precision winding
- Non precision winding
Precision winding: When the successive coils of yarn on a package and laid close together and parallel or nearly parallel with each other, then it is possible to produce a very dense package in which maximum amount of yarn is stored in a given volume is called precision winding.
Features of precision winding: There are a lot of features of precision winding. Followings are the features of precision winding:
- Reciprocating motion is used for wound the package.
- Patterning or robbing causes damage of package.
- It contains more yarn.
- Its stability is low.
- It is hard and more compact.
- Flange may be used.
- Packages are dense.
- Unwinding process rate is low and process is harder.
- The wound coil is arranged parallel or near parallel.
Non precision winding: This type of package consists of single thread which is laid on the package at appreciable helix angle, so that the large cross one another and give stability and a less dense package is produced is called non precision winding.
Features of non precision winding: Low density package is produced in non precision winding. Followings are the features of non precision winding.
- Only one coil is used.
- Winding is done in cross angle.
- Minimum yarn is stored.
- Packages are soft and less compact.
- Stability of this package is high.
- Low density package.
- Flanged is not necessary.
- Unwinding rate is high and process is easier.
Difference between Precision Winding and Non Precision Winding
||Non Precision Winding
|The wound coil is arranged parallel or near parallel.
||The coil is cross wise wound.
|The yarn density of the yarn package is high.
||The yarn density of the yarn package is low.
|The stability of the package is low.
||The stability of the package is high.
|The unwinding rate is low and process is harder.
||The unwinding rate is high and process is easier.
|The yarn package is hard and more compact.
||The yarn package is soft and less compact.
|The flanged package may be used.
||The package is not necessary to be flanged.
|Difficult to dye, only surface of the yarn is dyed properly.
||Easy to dye.
|process is less hairy.
||Process is more hairy.
After winding, warping and sizing is done for make a weavers beam.