There are two types of winding machines: precision winders and drum winders. Precision winders, used primarily for filament yarn, have a traverse driven by a cam that is synchronized with the spindle and produces packages with a diamond-patterned wind. Drum winders are used principally for spun yarns; the package is driven by frictional contact between the surface of the package and the drum.
Introduction
The choice of yarn winding method depends on the specific requirements of the yarn, the intended application, and the machinery available in the textile manufacturing process. Each winding method has its advantages and disadvantages, and selecting the appropriate method is crucial for ensuring the quality and performance of the final textile product.
Yarn winding is a crucial step in the textile manufacturing process, where yarn is wound onto a suitable package for further processing or storage. There are various methods and types of yarn winding, depending on the intended use and requirements of the yarn. Here are some common types of yarn winding:
- Precision Winding: This type of winding is used for high-quality and fine-count yarns. It involves winding the yarn onto a package with precision tension control to ensure uniform and smooth winding. Precision winding is essential for yarns used in knitting and weaving.
- Random Winding: Random winding is typically used for coarser yarns and bulkier fibers. In this method, yarn is wound onto a package without strict tension control, resulting in a more relaxed and uneven winding pattern. It is often used for making textured or slub yarns.
- Coning: Coning is the process of winding yarn onto a cone-shaped package. Cones are commonly used for dyeing, knitting, and weaving processes, as they provide better unwinding control and can be easily mounted on various textile machines.
- Cylindrical Winding: Cylindrical winding involves winding yarn onto a cylindrical package. This type of winding is suitable for yarns that need a higher level of tension control and precision. Cylindrical packages are used for weaving and warp knitting.
- Cross-Wound Package (Cone or Cheese): Cross-wound packages, also known as cones or cheese, are wound diagonally to create a stable and balanced package. These packages are commonly used in weaving, warp knitting, and crochet applications.
- Pirn Winding: Pirn winding is a specialized winding process used primarily in the weaving industry. It involves winding the yarn onto a shuttle pirn, which is then used in shuttle looms for weft insertion.
- Precision Coning: Precision coning combines the features of precision winding and coning. It involves winding yarn onto a precision-controlled cone package, ensuring uniform winding and tension control. This method is suitable for high-quality weaving and warp knitting yarns.
- Parallel Winding: Parallel winding is used for winding yarn onto parallel tubes or spools. It is often used in filament yarn production, as it provides uniform tension and prevents yarn distortion.
- Doubled and Twisted Winding: This type of winding involves twisting two or more strands of yarn together while winding onto a package. It is commonly used for producing plied yarns, which have improved strength and stability.
- Autoconing: Autoconing is an automated winding process that includes precision control of tension, yarn clearing, and splicing. It results in high-quality, uniform packages and is commonly used in large-scale textile manufacturing.
Precision Winding
By precision winding successive coils of yarn are laid close together in a parallel or near parallel manner. By this process, it is possible to produce a very dense package with a maximum amount of yarn stored in a given volume.
Feature
- The package is wound with a reciprocating traverse
- Patterning and rubbing causes damage to packages
- Package contains more yarn
- The package is less stable
- The package is hard and compact
- The package is dense
- The rate of unwinding of the package is low and the process of unwinding is hard
- The unwound coil is arranged in a parallel or near parallel manner
Non-Precision Winding
By this type of winding the package is formed by a single thread which is laid on the package at appreciable helix angle so that the layers cross one another and give stability to the package. The packages formed by this type of winding are less dense but is more stable.
Features
- Only one coil is used to make this packages
- Cross winding technique is used
- The package density is low
- Minimum number of yarn is wound
- The package formed is soft and less compact
- The stability is high
- Flanges are not required
- The rate of unwinding is high and the process is easy
- The packages formed have low density
Difference between Precision and Non-Precision Winding
| Precision Winding | Non-Precision Winding |
|---|---|
| The wound coil arranged parallel or near parallel. | The coil is cross wise-wound. |
| The yam density of the package is high. | The yam density of the package is low. |
| Flanged bobbin may be used. | Not use of flanged. |
| The yarn package is hard and more compact. | The yam package is soft and less compact. |
| Low stability of the package. | High stability of the package. |
| Winding angle is 90 or near 90. | Winding angle is less than 80. |
| The bobbin is wound with one or more threads. | The bobbin is wound with thread. |
| Yarn tension is comparatively high. | Yarn tension is comparatively less. |
| Unwinding rate is low. | Unwinding rate is high. |
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