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Spindelfabrik Suessen Schurr Stahlecker & Grill Gmbh

Novibra Gmbh

Fritz Stahlecker

Michael Horauf Maschinenfabrik

Maschinenfabrik Altstatten Ag

Spindelfabrik Sussen, Schurr, Stahlecker Und Grill Gmbh

Hans Stahlecker

Gerd Stahlecker

Hans Braxmeier

Norbert Barauke

Gerhard Fetzer

Wolfgang Feuchter

Eugen Bader

Heinz Schulz

A condensing zone for condensing a drafted fiber strand is arranged downstream of the front roller pair of a drafting apparatus of a ring spinning machine. The condensing zone includes a stationary sliding surface having a suction slit, over which the fiber strand is transported by a perforated transport belt. The condensing zone is bordered on its exit side by a nipping roller which is disposed on the transport belt. The nipping roller drives the transport belt and is in turn driven by a friction roller. The friction roller is pressed, by means of a loading spring, onto the nipping roller as well as onto a roller of the front roller pair of the drafting apparatus.

Apparatus and method for condensing a drafted fiber strand

A condensing zone for condensing a drafted, still twist-free fiber strand is arranged downstream of a front roller pair of a drafting unit of a spinning machine. An air-permeable transport belt transports the fiber strand through the condensing zone. The transport belt slides hereby over a stationary sliding surface, in which a suction slit of a suction channel is located. At the end of the condensing zone, the fiber strand is pressed with the transport belt by a nipping roller to the sliding surface. The nipping roller as well as the front pressure roller of the drafting unit are supported in a top weighting arm. A separate pressure spring is arranged each for the top pressure roller and for the nipping roller. It can be provided that the nipping roller is arranged at a holding device, which can be swivelled around a swivel axle, which lies coaxially to the axle of the front pressure roller.

Apparatus of a spinning machine for condensing a fibre strand

A transport belt for transporting a fiber strand to be condensed through a condensing zone of a ring spinning machine is provided with a perforation for an air suction stream which suctions the fiber strand. In at least one fiber strand transporting area, the perforation has at least 100 holes per square centimeter.

Transporting belt for transporting a fiber strand to be condensed and method of making same

An arrangement for a ring spinning machine for condensing a drafted but untwisted fiber strand includes a drum which transports the fiber strand through a condensing zone. The drum is provided on its outer sleeve with a perforation. In order that the perforation can be particularly fine and close-meshed, the outer sleeve of the drum forms a supporting skeleton, which comprises openings, which are covered over by a thin sieve belt, preferably a woven tape. The sieve belt extends over a suction slit located in the condensing zone. The skeleton is so formed that in the area of nipping points, formed together with the drum, the skeleton is sufficiently resistant.

Arrangement for a ring spinning machine for condensing a fiber strand and method of making same

A condensing zone is arranged downstream of the main drafting area of a drafting assembly of a ring spinning machine, which condensing zone is defined on one side by a front roller pair of the drafting assembly and on the other side by a nipping roller which presses a drafted fiber strand against a supporting surface. The peripheral speed of the nipping roller is from 3% to 8% greater than the peripheral speed of the front roller pair. The fiber strand to be condensed obtains thus a lasting draft in the condensing zone.

Condensing zone for a spinning machine

A condensing zone is arranged downstream of the front roller pair of a drafting arrangement of a spinning machine, in which condensing zone a drafted fiber strand is condensed. The condensing zone comprises a sliding surface having a suction slit, which sliding surface serves as a guide for a circulating air-permeable transport belt. The transport belt transports the fiber strand over the suction slit to a nipping roller, which presses the fiber strand and the transport belt against the sliding surface. The perforation of the transport belt presents a risk, namely that fiber fly or other impurities can be deposited between the sliding surface and the supporting surface of the transport belt arranged thereto. For this reason it is provided that the sliding surface has at least one sharp edge, which extends transversely to the transport direction and which scrapes the supporting surface. The sharp edge lies preferably in the area of the supporting surface which covers the suction slit.

Apparatus for condensing a drafted fiber strand

Flyer drafting arrangements deliver drafted fiber strands, whose width is greater than their height. Because of this, a condensing zone is often arranged downstream of the flyer drafting arrangements, which bundles the respective fiber strand laterally. Up to now, such condensing zones comprised mechanical condensers, which produced very unsatisfactory results. It is therefore provided in the present invention that a pneumatic condensing device is arranged at the condensing zone arranged downstream of the flyer drafting rollers. This condensing device can comprise a suction slit extending essentially in transport direction of the fiber strand, which suction slit is covered by an air-permeable transporting surface which guides the fiber strand.

Flyer drafting arrangement having a condensing zone

A condensing zone for pneumatic condensing of the drafted, still twist-free fiber strand is arranged downstream of the drafting apparatus of a ring spinning machine. The condensing zone is limited by a delivery roller pair, whose driven bottom roller is a suction roller, which is arranged directly downstream of the front roller pair of the drafting apparatus. The fiber strand loops the suction roller at an angle of at least 45&deg;.

Apparatus for pneumatic condensing of a drafted fiber strand and method of making and using same

An arrangement and method for spinning a yarn from a plurality of yarn components includes a drafting arrangement, a condensing zone arranged downstream thereof and also a ring spindle which twists all yarn components jointly. The condensing zone has a stationary sliding surface for a perforated transport belt which transports the yarn components through said condensing zone. At least one suction slit is located on the sliding surface, which suction slit extends essentially in a transport direction of the yarn components. The condensing zone is defined on its exit side by a nipping roller, which presses the yarn components and the transport belt onto the sliding surface. The at least one suction slit extends to the nipping point. The yarn components may be a sliver or roving and a core yarn, or two slivers or rovings, which, with or without any core yarn, together form the subsequent yarn.

Arrangement and method for spinning a yarn

A condensing zone for condensing a drafted twist-free fiber strand is arranged downstream of a drafting arrangement of a ring spinning machine. The condensing zone includes a stationary sliding surface having a suction slit extending essentially in a fiber strand transport direction. A perforated transport belt transports the fiber strand over the suction slit of the sliding surface. The transport belt wraps around a bottom roller of a front roller pair of the drafting arrangement and is driven by the bottom roller. The transport belt drives in turn a nipping roller, which limits the condensing zone on its exit side with a nipping point serving as a twist block. The nipping roller presses the fiber strand and the transport belt against the sliding surface of the condensing zone.

Arrangement for condensing a drafted fiber strand

A transport belt of a ring spinning machine for transporting a fiber strand to be condensed over a suction slit of a condensing zone is provided with a perforation or perforations for a suction air stream which suctions the fiber strand. The transport belt comprises a nonperforated area which permits a friction drive, and also an effective area containing the perforation, the width of the effective area being larger than the width of the suction slit. For example, the transport belt comprises a skeleton belt forming a supporting structure with a close-meshed woven fabric applied thereto.

Transport belt for transporting a fiber strand to be condensed

An arrangement for condensing a drafted fiber strand is arranged at each spinning station of a spinning machine. The condensing arrangements each comprise a transport surface which transports the fiber strand over a suction slit of a suction device. A joint suction device having its own fan is provided for a certain number of spinning stations so that differences in underpressure between the individual spinning stations are avoided to a great extent.

Spinning machine having a plurality of spinning stations

A spinning process provides for opening at least one sliver to single fibers and for depositing the single fibers on a moving collecting surface in the form of an expanded fiber veil. During transport on the collecting surface and, if required on a moving drafting surface downstream thereof, the fiber veil is condensed, transversely to its direction of motion, to a strand. The roving-like strand is transported through a nipping line and twisted to a yarn under the action of a rotating air stream. Fiber ends are hereby spread out from the strand, which are helically wrapped around the yarn.

Spinning process and apparatus for performing same

In a spinning process for producing a yarn, fiber material in the form of at least one sliver is opened to a fibrous veil consisting of single fibers, and is deposited on an air-permeable suctioned collecting surface. The speed of the fibrous veil transported on the collecting surface is preferably not higher than the speed of the drawn off yarn. Before reaching the yarn formation line located on the collecting surface, the fibrous veil is divided into a plurality of fiber accumulations and thereby pre-twisted to strands. The position and travelling direction of the strands on the collecting surface is defined by guiding edges of suction slits. The individual strands are guided off transversely to the yarn formation line, whereby the extent of the pre-twist and the extent of the transport force is determined by the angle of the strands to the yarn formation line. Pre-twisted strands are wound around each other along the yarn formation line so that a type of ply-twisted yarn arises.

Spinning process for producing a yarn

For the direct spinning of drafting frame sliver, a one-sided ring spinning machine is provided, in the case of which the spinning stations are arranged on one side of the machine and the depositing sites for the cans containing the sliver to be spun are arranged on the other side of the machine. For the withdrawing of the slivers, a drivable deflecting guide is provided closely above the cans which is situated at least approximately in the same horizontal plane as the drivable feeding rollers of the pertaining drafting units. Preferably, the deflecting guide is formed by a transport belt which transports the slivers from the cans to the drafting units. Preferably, the transport belt has a linear course and is driven by the drivable feeding roller of the pertaining drafting unit.

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7334 Sussen, Germany

Hans Stahlecker