The comber is followed by simplex. The sliver made by the comber is so thick that it is no suitable to feed into the ring frame directly to produce yarn. For that, drawn sliver need to be treated in advance. The silver is processed by simplex. This roving frame converted the thick drawn sliver into thin sliver with low twist and produce fine roving which is suitable to produce yarn by feeding into the ring or others.
Drawn sliver→Speed frame/Roving frame/Simplex→Roving→Roving→Ring frame→Yarn
During the process drawn sliver is input and fine roving is output. Roving enters into ring frame to produce yarn. Simplex is used to in case of ring spinning by ring spinning system when producing cotton yarn.
Functions of simplex frame: Using simplex frame such as carding or combing action can achieve various purposes. The followings are the functions of simplex frame.
1.Creeling: Creeling is the first objective of simplex frame arrangement. By the creeling, small amount of draft is applied to the drawn sliver.
2.Drafting: Attenuation of drawn sliver to produce required amount of roving by drafting. Thick drawn sliver is converted into thin roving by the drafting system.
3.Twisting: Small amount of twist is inserted in the drafted stand of fibers by the twisting. The amount of twist is very low.
4.Building: Build the roving on to bobbin such a form which will facilitate unwinding handling and transfer to the next process.
5.Winding: Produced or twisted roving is wound on the bobbin by the winding process. This bobbin is feed to the ring frame and this bobbin accelerates the next process. So, it is important.
6.Doffing: It is the optional functions of speed frame. Doffing could be done manually or automatically.
1.Creeling: Creeling applies small amount of draft to the drawn sliver.
2.Drafting: The Drafting system converts drawn sliver into thin roving.
3.Twisting: Twisting inserts small amount of twist in the drafted stand of fibers.
4.Building: Build the roving on to bobbin such a form which will facilitate unwinding handling and transfer to the next process.
5.Winding: The winding process wind the twisted roving on the bobbin.
6.Doffing: Doffing is operated manually or automatically.
Simplex frame is quite important for spinning process. Unsuitable process can cause defects on yarns. So, the operator should be carful during the process. Machine parameter should be set properly for producing specific count yarn. Proper roving can enhance the properties of yarn.