Different changes take place in the speed/roving/simplex frame and affects in yarn count. Now we are discussing about it – Draft change pinion (D. C. P): A large wheel reduces the draft and so gives a coarser hank (where the D. C. P is a driven one). Draft constant change pinion: The larger the draft constant change wheel, the greater […]
Wool Production Process | Difference between Worsted and Woolen System
Wool Production Process Sheep are sheared to remove the fleece in the spring season. Wool removed from animals that have been slaughter is referred to as ‘pulled wool’. Pooled fibre is inferior in quality to fleece or tip wool as it is less lustrous and elastic. It can be spun into yarns by the woolen or the worsted system. […]
Physical and Chemical Properties of Wool Fibre
Wool fibre is a protein known as keratin. Keratin is made up of amino-acids joined by peptide linkages. In addition to carbon, hydrogen, oxygen and nitrogen it also contains sulphur. The amino-acids present in wool are mainly bulky, while silk has chiefly small amino-acids. Due to this wool is relatively amorphous. The polymer system of wool is […]
Roller Setting in Speed/Simplex/Roving Frame
Roller setting is a very important task in the spinning department. Incorrect settings lead to creation of various problems and hampers spinning conditions. The speed of the leading roller is always greater than the preceding roller. Incorrect setting leads to the variation of weight/unit lengths. If the setting between two pairs of drafting roller is […]
Sectional Warping Machine
Woven fabric is produced by the weaving process in the weaving mills. Sectional warping is an important process in these weaving mills. It is used to produce warp beams for weaving. So it is the preliminary process of weaving. In this article, we will learn about the sectional warping machine working process. Introduction The sectional warping […]
Importance of Roller Weighting | Advantages of Spring Weighting
The roller weightings generally applied to the top rollers by a weight hanging below the roller beam are about 20 lbs for a double boss front roller, 14 lbs for a middle roller, and 10 lbs for a back roller, the middle and back rollers may be saddle weighted (spring weighted). In this case, the […]
Physical and Chemical Properties of Silk
Silk had its origin to China for more than 4000 years ago. It was a properly guarded secret in China. Several centuries passed before its knowledge has transferred into Japan via Korea. India was also the seat of silk and sericulture. A single cocoon is made of an incessant filament of silk which the silkworm […]
Changes to be Made in a Speed Frame when a Certain Hank is Made Finer
Suppose, a certain hank is made on a machine and it is desired to change to a higher count. The same sliver or roving is used in the creel. The necessary changes are as follows: Draft: This must be altered in order to make the delivery roving finer. The draft change pinion (D.C.P) will therefore be […]
Functions of Cone Drum, Flyer, Bobbin Tapper and Differential Motion
Cone Drum As each layer of roving is added to the bobbin in the speed frame, its diameter is increased. In flyer leading and bobbin leading frame, it is necessary to increase or decrease the bobbin rpm respectively to maintain a constant surface speed on the bobbin surface as each layer is added to its diameter […]
Different Parts of a Loom
Weaving is done on a machine called a loom. All the weaves that are known today have been made for thousands of years. The precise shape of the loom and its mechanics may vary, but the basic function is the same. Warp yarns are held taut within the loom, and weft yarns are inserted and […]