Roving

Roving is a derived from the English term for a so-called roving, ie a slightly twisted staple fiber tape as an intermediate ( semi-finished ) in the yarn.

Importance of the roving in the process of yarn production

Order in ring spinning very fine (thin, low mass per unit length ) to produce yarns, it is necessary to submit rovings, also with the least possible length related mass as the starting material. For this relatively fine rovings can be wound destructively stock coils and later settled by these again, they get a slight rotation ( a small twist, a small twist ), but nevertheless remain capable of further distortion ( refinement capable). The roving can be made ​​of different staple fiber ribbons. By rotating about the longitudinal axis of a fiber sliver forces act on the individual fibers in the direction of the center of the strip, whereby the fibers are pressed against each other. Thus, the increased friction between them, resulting in a load in the longitudinal direction to an increased resistance of the roving against pulling apart. The rotation results in a compression and thus a smaller diameter of the roving. The light turns receives a spin sliver either on a flyer, a roving frame, or a Nitschelwerk.

Flyer for Rovingherstellung

The Flyer (English " wing"), is mostly used in the three-cylinder spinning and worsted spinning. The of the upstream processes of doubling and stretching ( warping ) derived spin sliver ( sliver ) is thereby passed through a guide loop that acts as a swirl jam, and then led to the rotating fork-shaped wing which causes the rotation of the roving. The thus provided with small twists roving ( Flyerlunte ) is wound on a spool flyer. It is submitted to be spun into yarn there with the desired properties of the ring spinning machine.

Nitschelwerk to Rovingherstellung

The Nitschelwerk finds particular use in the carded. After the Vorspinnkrempel discharged from the Vorspinnkrempel batt is divided into narrow Florstreifen by a Vielriemchenflorteilers. Since these external influences can hardly resist, they are fed a Nitschelwerk. There the Florstreifen between two are superimposed, reciprocating rubber bands ( so-called Nitschelhosen ) attempting to perform a perpendicular transport movement, slightly rounded and compressed and fed the Spulenaufwicklung. Then the roving thus generated ( Nitschelbänder ) can be processed on the ring spinning machine for yarn.

Others

Rovings (eg hand knitting of Lopi ) can be directly processed into fabrics using textile and handicraft techniques.