EP2881500B1 - Screen apron for fibre-condensing guides - Google Patents

Screen apron for fibre-condensing guides Download PDF

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Publication number
EP2881500B1
EP2881500B1 EP14195936.1A EP14195936A EP2881500B1 EP 2881500 B1 EP2881500 B1 EP 2881500B1 EP 14195936 A EP14195936 A EP 14195936A EP 2881500 B1 EP2881500 B1 EP 2881500B1
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EP
European Patent Office
Prior art keywords
filaments
lattice apron
wire mesh
fiber bundle
transport region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP14195936.1A
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German (de)
French (fr)
Other versions
EP2881500A1 (en
Inventor
Peter Blankenhorn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication date
Priority claimed from DE102013113510.2A external-priority patent/DE102013113510A1/en
Priority claimed from DE102014106745.2A external-priority patent/DE102014106745A1/en
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP2881500A1 publication Critical patent/EP2881500A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D03D1/0094—Belts
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/30—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments
    • D03D15/37—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments with specific cross-section or surface shape
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
    • D03D15/46—Flat yarns, e.g. tapes or films
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial

Definitions

  • a wire mesh for a compacting device of a spinning machine has a fabric of filaments and is perforated at least in a fiber transport region of the wire mesh with a defined free area of at least 10% to allow a suction air stream to act on a fiber bundle moved thereon.
  • the Siebriemchen is an elementary component of a compacting device in compact or compaction spinning machines. After passing through a conventional drafting system with a pair of output rollers, a stretched fiber bundle is taken from the wire mesh after leaving the pair of output rollers and transported by means of the driven Siebriemchens via a stationary suction slot. Vacuum acts on the fiber bundle through the suction slot and compacts it into a compact body. Projecting fibers are applied to the fiber bundle. Since the suction slot is usually inclined to the direction of movement of the wire mesh, a lateral relative movement of the fiber bundle is forced over the surface of the wire mesh. The fiber bundle curls up during this movement - it creates a false twist. In addition to the purely pneumatic compression thus an additional, mechanical compression is achieved.
  • the sieve strap prevents suction of fibers during compaction and guides the fibers over the suction slot.
  • the Siebriemchens drive, for example, by a top roller with rubber cover, which presses the Siebriemchen against the surface of the compression device or against a suction tube and thus converts the rotational movement of the pressure roller in a revolution of the Siebriemchens.
  • a top roller with rubber cover which presses the Siebriemchen against the surface of the compression device or against a suction tube and thus converts the rotational movement of the pressure roller in a revolution of the Siebriemchens.
  • the fabric of the wire mesh made of filaments has a certain resistance to displacement, which is determined by the bending and tensile strength of the filament and the weave of the fabric. If the resistance to displacement of the wire mesh is insufficient, the fabric may shift due to the friction between the wire mesh and the compacting device which fluctuates across the width of the wire mesh, resulting in a lateral drainage of the wire mesh or even wrinkling.
  • Object of the present invention is therefore to be able to achieve the best possible yarn quality with a wear-resistant Siebriemchen as possible.
  • An inventive wire mesh is provided for a compacting device of a spinning machine, in particular a compacting or compact spinning machine.
  • the sieve strap has a fabric of filaments.
  • the wire mesh is designed such that in a fiber transport region of the wire mesh a fiber bundle can be picked up by the wire mesh and transported together with the wire mesh to a delivery point of the fiber bundle. , is.
  • the fiber transport region is seen transversely to the transport direction of the Siebriemchens the area in which a fiber bundle, which is received by the pair of output roller of the upstream drafting on the Siebriemchen and discharged again at the discharge point, or in other words, the area the fiber bundle travels on the sieve strap by its relative movement transversely to the longitudinal direction of the wire mesh.
  • the fiber transport region is thus not defined solely by the transport movement of the fiber bundle, but because the fiber bundle usually also performs a relative movement transversely to the direction of movement of the sieve wire, the fiber transport region is also laterally fixed.
  • the lateral boundary of the fiber transport region usually results from a suction slot, which is arranged in a suction tube below the wire mesh.
  • the sieve strap is perforated with a defined free space of at least 10%. This means that at least 10% of the Siebriemchens in the fiber transport area are permeable to air for acting below the Siebriemchens Saug Kunststoffstrom.
  • the remaining surface of the wire mesh is covered by the filaments of the fabric and serves not to suction the fiber bundle moved on the wire mesh, but to retain the fibers of the fiber bundle, so that they are not sucked into the suction.
  • the suction slot can be arranged either parallel to the direction of movement of the wire mesh or inclined thereto in the suction pipe.
  • the suction pipe also serves to guide the wire mesh as well as a mating surface for a driven roller which moves the wire mesh.
  • the Siebriemchen is usually endless. That is, the sieve strap formed a ring which is placed around the guide or the suction tube and constantly transported the incoming fiber bundle.
  • the surface of the filaments contacting the fiber bundle is flattened, at least in the fiber transport region, in comparison with a round surface of the filaments.
  • the flattened surface of the filaments is provided only on the upper side of the wire mesh.
  • the yarn formation is advantageously influenced in particular.
  • the filaments it is also possible for the filaments to have flattened surfaces both on the upper side and on the underside of the wire mesh. With this configuration of the filaments, a particularly advantageous influence on the wear of the wire mesh is to be taken.
  • the flattened surface be provided in the transport area of the wire mesh
  • the wire mesh itself if the flattened surface of the filaments is provided both in the fiber transport area and in the edge areas of the wire mesh are.
  • the flattening on the top and on the bottom can be provided differently or completely omitted in some areas.
  • the complete Siebriemchen be provided only on the top or at the top and bottom with flattened filaments.
  • the surface of the filaments is calendered at least in the fiber transport region, this causes, for example, by means of a heat action, that the cross sections of the filaments are changed and thus have a flattened surface.
  • the filaments used in the fabric are profiled.
  • filaments are used which have a non-round profile already during their production or a corresponding post-processing prior to the production of the fabric.
  • the profile is such that it has at least one flattened surface in the cross section of the filament.
  • the profiled filaments preferably have a flattened, in particular oval or elliptical or substantially rectangular cross section.
  • a flattened cross-section can be produced which, when used appropriately in the fabric of the wire mesh, leads to a flattened surface of the fabric and thus of the wire mesh.
  • the filaments have a diameter between 30 .mu.m and 400 .mu.m. This allows fine and coarse fiber bundles are processed. In a particularly preferred embodiment, the filaments have a diameter of between 80 ⁇ m and 300 ⁇ m. These cross-sectional diameters provide the best compromise between good yarn production and a wear-resistant wire bond.
  • the evacuated flank area in the fiber transport area is between 10% and 45% of the wire mesh in its fiber transport area.
  • a sufficiently strong suction force is generated on the fiber bundle, which it pressed against the wire mesh and on the other hand, but also still allows the relative movement of the fiber bundle.
  • the filaments are fused together at least in the fiber transport region in the crossing points of the fabric and / or pressed or connected to each other by means of a positive connection.
  • the wire mesh is provided with a coating, in particular with a polymer, at least at the intersection points of the filaments, a rounding of the filaments and of the mesh openings or free surfaces of the fabric takes place in a particularly advantageous manner.
  • a coating in particular with a polymer
  • the coating flows at the crossing points between the filaments and forms a skin-like layer. At the same time it can be effected that the filaments stick together by the coating and thus an additional strength of the fabric is achieved.
  • the coating can be applied before and / or after the flattening of the filaments.
  • the filaments are fused or glued together at the edge regions of the wire mesh in order to avoid fraying of the wire mesh.
  • the durability of the Siebriemchens is thereby improved.
  • the border area is the area which is outside the area under which the suction slot exerts its suction force on the fiber bundle.
  • the fusing or gluing can also take place in such a way that no or barely a suction force can be applied through the wire mesh more.
  • the sieve strap can be completely or almost dense in these areas.
  • FIG. 1 shows a section of a suction slot 2 with the overlying conventional fine Siebriemchen 1 and a fiber bundle arranged thereon 3. Due to the inclination of the suction slot 2 with respect to the direction of movement B of the wire mesh 1, a mechanical compression of the fiber bundle 3 is achieved.
  • the fiber bundle 3 is located on one side or at an edge of the suction slot 2. Since the fiber bundle 3 by the suction air flow S is pressed onto the surface of the wire mesh 1 and the fiber bundle 3 is bulky and elastic, it partially immersed in the conditional by the binding of the tissue depressions.
  • FIG. 2 Clearly different is the situation with a Siebriemchen 1 with a coarse, for example, 150 micron thick filament.
  • the situation is in FIG. 2 shown.
  • the fiber bundle 3 dives deep into the tissue-induced depressions of the tissue. To move the fiber bundle 3 laterally, an increased resistance is overcome.
  • the fabric structure is also important when the fiber bundle 3 strikes the wire mesh 1.
  • a broad fiber stream coming from the pair of drawing rollers, not shown, of the drafting system must be combined over the elevations of the fabric to form a compact fiber bundle 3.
  • the elevations of the tissue also have a disadvantageous effect here.
  • FIG. 3 a section of a Siebriemchens invention 1 is shown.
  • the individual filaments of the wire mesh are flattened on their surface or on the top and bottom of the wire mesh 1 in the region of their bond.
  • Some of the flats 6 are in the FIG. 3 drawn in and marked.
  • the resistance of the fiber bundle 3 with a relative movement R is significantly lower in this embodiment than in the embodiments according to FIG FIG. 1 or in particular the FIG. 2 ,
  • the invention now reduces the bond-related elevations of a conventional one Tissue even when using a coarse filament to a minimum.
  • the open spaces 5 can remain essentially the same.
  • a flattening of the top of Siebriemchens 1 is sufficient to achieve an advantage over conventional Siebriemchen.
  • the partial flattening of the yarn transport area is another production possibility - while the fabric is adjacent to the yarn transport area without flattening 6.
  • the wire mesh 1 is flattened on both the top and the bottom and across the entire width. It is also possible to flatten the wire mesh 1 only partially in the yarn transport area - either only on the top or on the top and bottom.
  • FIG. 4 shows a portion of a suction tube 4, around which the Siebriemchen 1 is guided.
  • the wire mesh 1 is driven in the direction of movement B by means of a pinch roller, not shown. It slides with its underside over the surface of the fixed suction pipe 4.
  • the fiber bundle 3 passes to a not shown pair of output rollers of a drafting on the in the FIG. 4 shown right end of the suction slot 2 and is transported together with the wire mesh 1 in the direction of movement B.
  • the suction slot 2 is vacuumed with negative pressure.
  • This suction air stream S flows through the open spaces 5 of the wire mesh 1 and holds the fiber bundle 3 on the wire mesh 1 firmly.
  • the fiber bundle 3 undergoes a relative movement in the direction of the arrow R perpendicular to the direction of movement B of the wire mesh 1. As a result, the fiber bundle 3 rolls or slides transversely to the direction of movement B of the wire mesh 1.
  • the fiber transport region F is located substantially in the region of the wire mesh 1, which is arranged above the suction slot 2, or in the region where the fiber bundle 3 impinges on the wire mesh 1 to the point where the fiber bundle 3 leaves the wire mesh again.
  • the lateral areas outside the fiber transport area 11 can also, as in FIG. 3 shown to be provided with flattened filaments. Alternatively, it is also possible to leave the filaments of the edge region conventionally, ie with a, for example, round cross-section.
  • the filaments generally have a diameter between 30 .mu.m and 400 .mu.m, preferably between 80 .mu.m and 300 .mu.m.
  • the free surface 5 in the fiber transport region F is preferably between 10% and 45%.
  • the present invention is not limited to the illustrated embodiments. There are a variety of other shapes, in particular different flattenings 6 of the filaments, covered by the present invention. It is essential here that the filaments have a cross-section relative to a round cross-section, which allows the transverse movement of the fiber bundle 3 on the fabric with less resistance.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Woven Fabrics (AREA)

Description

Ein Siebriemchen für eine Verdichtungseinrichtung einer Spinnmaschine weist ein Gewebe aus Filamenten auf und ist zumindest in einem Fasertransportbereich des Siebriemchens mit einer definierten Freifläche von mindestens 10 % perforiert, um einen Saugluftstrom auf ein darauf bewegtes Faserbündel einwirken zu lassen.A wire mesh for a compacting device of a spinning machine has a fabric of filaments and is perforated at least in a fiber transport region of the wire mesh with a defined free area of at least 10% to allow a suction air stream to act on a fiber bundle moved thereon.

Das Siebriemchen ist ein elementares Bauteil einer Verdichtungseinrichtung bei Kompakt- oder Verdichtungsspinnmaschinen. Nach dem Durchlaufen eines konventionellen Streckwerks mit einem Ausgangswalzenpaar wird ein verstrecktes Faserbündel nach dem Verlassen des Ausgangswalzenpaars vom Siebriemchen übernommen und mit Hilfe des angetriebenen Siebriemchens über einen stationären Saugschlitz transportiert. Durch den Saugschlitz hindurch wirkt Unterdruck auf das Faserbündel und verdichtet es zu einem kompakten Körper. Abstehende Fasern werden an das Faserbündel angelegt. Da der Saugschlitz in der Regel zur Bewegungsrichtung des Siebriemchens geneigt ist, wird eine seitliche Relativbewegung des Faserbündels über die Oberfläche des Siebriemchens erzwungen. Das Faserbündel rollt sich bei dieser Bewegung ein - es entsteht ein Falschdraht. Neben der rein pneumatischen Verdichtung wird somit eine zusätzliche, mechanische Verdichtung erreicht.The Siebriemchen is an elementary component of a compacting device in compact or compaction spinning machines. After passing through a conventional drafting system with a pair of output rollers, a stretched fiber bundle is taken from the wire mesh after leaving the pair of output rollers and transported by means of the driven Siebriemchens via a stationary suction slot. Vacuum acts on the fiber bundle through the suction slot and compacts it into a compact body. Projecting fibers are applied to the fiber bundle. Since the suction slot is usually inclined to the direction of movement of the wire mesh, a lateral relative movement of the fiber bundle is forced over the surface of the wire mesh. The fiber bundle curls up during this movement - it creates a false twist. In addition to the purely pneumatic compression thus an additional, mechanical compression is achieved.

Das Siebriemchen verhindert ein Einsaugen von Fasern während der Verdichtung und führt die Fasern über den Saugschlitz. Der Antrieb des Siebriemchens erfolgt beispielsweise durch eine Oberwalze mit Gummibezug, welche das Siebriemchen gegen die Oberfläche der Verdichtungseinrichtung bzw. gegen ein Saugrohr drückt und somit die Drehbewegung der Druckwalze in eine Umlaufbewegung des Siebriemchens umwandelt. Durch das Anpressen des Siebriemchens auf die stationäre Verdichtungseinrichtung unterliegt das Siebriemchen auf der Unterseite einem Verschleiß, weleher bei den meisten Anwendungen die Lebensdauer des Siebriemchens bestimmt.The sieve strap prevents suction of fibers during compaction and guides the fibers over the suction slot. The Siebriemchens drive, for example, by a top roller with rubber cover, which presses the Siebriemchen against the surface of the compression device or against a suction tube and thus converts the rotational movement of the pressure roller in a revolution of the Siebriemchens. By pressing the Siebriemchens on the stationary compression device is subject to the Siebriemchen on the bottom of a wear, weleher In most applications, the service life of the wire mesh is determined.

Um einen gleichförmigen Umlauf des Siebriemchens um die Verdichtungseinrichtung zu erreichen, ist es außerdem notwendig, dass das aus Filamenten hergestellte Gewebe des Siebriemchens eine bestimmte Verschiebefestigkeit besitzt, welche durch die Biege- und Zugfestigkeit des Filaments und die Bindung des Gewebes bestimmt wird. Ist die Verschiebefestigkeit des Siebriemchens nicht ausreichend, kann es durch eine über die Breite des Siebriemchens schwankende Reibung zwischen dem Siebriemchen und der Verdichtungseinrichtung zu einem Verschieben des Gewebes kommen, was ein seitliches Ablaufen des Siebriemchens oder sogar eine Faltenbildung zur Folge hat.In order to achieve a uniform circulation of the wire mesh around the compacting device, it is also necessary that the fabric of the wire mesh made of filaments has a certain resistance to displacement, which is determined by the bending and tensile strength of the filament and the weave of the fabric. If the resistance to displacement of the wire mesh is insufficient, the fabric may shift due to the friction between the wire mesh and the compacting device which fluctuates across the width of the wire mesh, resulting in a lateral drainage of the wire mesh or even wrinkling.

Vor allem bei der Verarbeitung von Langstapelmaterial oder beim Herstellen von Kern-Mantel-Garnen kann es auch auf der Oberfläche des Siebriemchens zu einem Verschleiß kommen. Da die Fasern sowohl zwischen dem Ausgangswalzenpaar des Streckwerkes als auch an der Antriebstelle des Siebriemchens geklemmt sind, kann es durch geringe Abweichungen in den Umfangsgeschwindigkeiten auch zu einem Längsgleiten der Fasern über die Oberfläche des Siebriemchens kommen, welches das Siebriemchen verschleißen lässt.Especially when processing long staple material or when producing core-sheath yarns, wear on the surface of the sieve stitch may also occur. Since the fibers are clamped both between the pair of output rollers of the drafting system as well as at the drive point of the wire mesh, small deviations in the peripheral speeds can also lead to a longitudinal sliding of the fibers over the surface of the wire mesh, which causes the wire mesh to wear.

Ein weiterer Aspekt für die Gewebekonstruktion ist der Energiebedarf. Messungen haben ergeben, dass bei gleicher freier Fläche der Unterdruckverlust bei einem groben Gewebe geringer ist als bei einem feinen Gewebe. Auch scheint die bei einem groben Gewebe zunehmend lokale Wirkung des Luftstroms nicht von Nachteil zu sein. Zum Erreichen eines möglichst guten Wirkungsgrads der Verdichtungseinrichtung ist daher ein möglichst grobes Gewebe anzustreben.Another aspect for fabric construction is the energy requirement. Measurements have shown that with the same free area of the negative pressure loss in a coarse tissue is lower than in a fine tissue. Also, the increasingly local effect of the air flow on a coarse fabric does not seem to be a disadvantage. In order to achieve the best possible efficiency of the compacting device, therefore, the aim is to achieve as coarse as possible a tissue.

Zusammenfassend kann gesagt werden, dass auf Grund der vorliegenden Erfahrungen bezüglich der Feinheit des Siebriemchens zwei gegenläufige Anforderungen vorhanden sind:

  • Zum Erreichen einer möglichst guten Garnqualität muss das Siebriemchen so fein wie möglich und damit das Filament im Durchmesser so klein wie möglich sein.
  • Zum Erreichen einer möglichst großen Standzeit und zum Erreichen einer möglichst guten Verschiebefestigkeit und eines guten Wirkungsgrads muss das Siebriemchen so grob wie möglich und damit das Filament im Durchmesser so groß wie möglich sein.
In summary, it can be stated that there are two conflicting requirements based on the experience gained regarding the fineness of the wire mesh:
  • To achieve the best possible yarn quality, the sieve must be as fine as possible and thus the filament in the diameter as small as possible.
  • To achieve the longest possible service life and to achieve the best possible displacement resistance and a good efficiency, the sieve must be as large as possible and thus the filament in diameter as large as possible.

Aufgabe der vorliegenden Erfindung ist es somit, eine möglichst gute Garnqualität mit einem möglichst verschleißfesten Siebriemchen erzielen zu können.Object of the present invention is therefore to be able to achieve the best possible yarn quality with a wear-resistant Siebriemchen as possible.

Die Aufgabe wird gelöst mit einem Siebriemchen mit den Merkmalen des unabhängigen Anspruches 1.The object is achieved with a Siebriemchen with the features of independent claim 1.

Ein erfindungsgemäßes Siebriemchen ist für eine Verdichtungseinrichtung einer Spinnmaschine, insbesondere einer Verdichtungs- bzw. Kompaktspinnmaschine vorgesehen. Das Siebriemchen weist ein Gewebe aus Filamenten auf. Das Siebriemchen ist derart ausgestaltet, dass in einem Fasertransportbereich des Siebriemchens ein Faserbündel von dem Siebriemchen aufgenommen und zusammen mit dem Siebriemchen zu einer Abgabestelle des Faserbündels transportiert werden kann. , ist. Der Fasertransportbereich ist quer zur Transportrichtung des Siebriemchens gesehen der Bereich, in welchem ein Faserbündel, das vom Ausgangswalzenpaar des vorgelagerten Streckwerkes kommend auf dem Siebriemchen aufgenommen und an der Abgabestelle wieder abgegeben wird, oder anders ausgedrückt, der Bereich, den das Faserbündel durch seine Relativbewegung quer zur Längsrichtung des Siebriemchens auf dem Siebriemchen zurücklegt. Der Fasertransportbereich ist damit nicht alleine durch die Transportbewegung des Faserbündels definiert, sondern dadurch, dass das Faserbündel in der Regel auch eine Relativbewegung quer zur Bewegungsrichtung des Siebriemchens durchführt, ist der Fasertransportbereich auch seitlich festgelegt. Die seitliche Begrenzung des Fasertransportbereichs ergibt sich in der Regel durch einen Saugschlitz, welcher in einem Saugrohr unterhalb des Siebriemchens angeordnet ist.An inventive wire mesh is provided for a compacting device of a spinning machine, in particular a compacting or compact spinning machine. The sieve strap has a fabric of filaments. The wire mesh is designed such that in a fiber transport region of the wire mesh a fiber bundle can be picked up by the wire mesh and transported together with the wire mesh to a delivery point of the fiber bundle. , is. The fiber transport region is seen transversely to the transport direction of the Siebriemchens the area in which a fiber bundle, which is received by the pair of output roller of the upstream drafting on the Siebriemchen and discharged again at the discharge point, or in other words, the area the fiber bundle travels on the sieve strap by its relative movement transversely to the longitudinal direction of the wire mesh. The fiber transport region is thus not defined solely by the transport movement of the fiber bundle, but because the fiber bundle usually also performs a relative movement transversely to the direction of movement of the sieve wire, the fiber transport region is also laterally fixed. The lateral boundary of the fiber transport region usually results from a suction slot, which is arranged in a suction tube below the wire mesh.

Das Siebriemchen ist mit einer definierten Freifläche von mindestens 10% perforiert. Das bedeutet, dass mindestens 10% des Siebriemchens in dem Fasertransportbereich luftdurchlässig für einen unterhalb des Siebriemchens wirkenden Saugluftstrom sind. Die übrige Fläche des Siebriemchens ist von den Filamenten des Gewebes abgedeckt und dient nicht zur Besaugung des auf dem Siebriemchen bewegten Faserbündels, sondern zur Zurückhaltung der Fasern des Faserbündels, damit sie nicht in die Absaugung eingesaugt werden.The sieve strap is perforated with a defined free space of at least 10%. This means that at least 10% of the Siebriemchens in the fiber transport area are permeable to air for acting below the Siebriemchens Saugluftstrom. The remaining surface of the wire mesh is covered by the filaments of the fabric and serves not to suction the fiber bundle moved on the wire mesh, but to retain the fibers of the fiber bundle, so that they are not sucked into the suction.

Der Saugschlitz kann entweder parallel zur Bewegungsrichtung des Siebriemchens oder auch geneigt hierzu in dem Saugrohr angeordnet sein. Das Saugrohr dient in der Regel auch zur Führung des Siebriemchens sowie als Gegenfläche für eine angetriebene Walze, welche das Siebriemchen bewegt. Darüber hinaus ist das Siebriemchen in der Regel endlos. D.h., das Siebriemchen bildete einen Ring, welcher um die Führung bzw. das Saugrohr gelegt ist und ständig das ankommende Faserbündel transportiert.The suction slot can be arranged either parallel to the direction of movement of the wire mesh or inclined thereto in the suction pipe. As a rule, the suction pipe also serves to guide the wire mesh as well as a mating surface for a driven roller which moves the wire mesh. In addition, the Siebriemchen is usually endless. That is, the sieve strap formed a ring which is placed around the guide or the suction tube and constantly transported the incoming fiber bundle.

Erfindungsgemäß ist die das Faserbündel kontaktierende Oberfläche der Filamente zumindest im Fasertransportbereich im Vergleich zu einer runden Oberfläche der Filamente abgeflacht ausgebildet. Hierdurch wird im Gegensatz zu den Filamenten mit einer runden Oberfläche eine leichtere Bewegung des Faserbündels auf der Oberfläche des Siebriemchens ermöglicht. Eine insbesondere quer zur Bewegungsrichtung des Siebriemchens erfolgende Relativbewegung ist hierdurch widerstandsärmer durchzuführen. Damit kann ein besseres Garnen geschaffen und darüber hinaus der Verschleiß des Siebriemchens reduziert werden.According to the invention, the surface of the filaments contacting the fiber bundle is flattened, at least in the fiber transport region, in comparison with a round surface of the filaments. As a result, in contrast to the filaments with a round surface, an easier movement of the fiber bundle on the surface of the wire mesh is made possible. A in particular transverse relative to the direction of movement of the Siebriemchens relative movement is thereby perform low-resistance. Thus, a better yarns can be created and beyond the wear of the Siebriemchens be reduced.

In einer besonders vorteilhaften Ausführung der Erfindung ist die abgeflachte Oberfläche der Filamente nur auf der Oberseite des Siebriemchens vorgesehen. Hierdurch wird insbesondere auf die Garnbildung vorteilhaft Einfluss genommen. Alternativ hierzu ist es auch möglich, dass sowohl auf der Oberseite als auch auf der Unterseite des Siebriemchens die Filamente abgeflachte Oberflächen aufweisen. Mit dieser Gestaltung der Filamente ist auch ein besonders vorteilhafter Einfluss auf den Verschleiß des Siebriemchens zu nehmen.In a particularly advantageous embodiment of the invention, the flattened surface of the filaments is provided only on the upper side of the wire mesh. As a result, the yarn formation is advantageously influenced in particular. Alternatively, it is also possible for the filaments to have flattened surfaces both on the upper side and on the underside of the wire mesh. With this configuration of the filaments, a particularly advantageous influence on the wear of the wire mesh is to be taken.

Während es für die Auswirkungen auf die Garnqualität wichtig ist, dass die abgeflachte Oberfläche in dem Transportbereich des Siebriemchens vorgesehen ist, kann es für das Siebriemchen selbst vorteilhaft sein, wenn die abgeflachte Oberfläche der Filamente sowohl in dem Fasertransportbereich als auch in den Randbereichen des Siebriemchens vorgesehen sind. Dabei kann es Zonen geben, in welchen die Oberfläche der Filamente nicht abgeflacht und andere Zonen, in welchen sie abgeflacht ist. Auch die Abflachung auf der Oberseite und auf der Unterseite kann unterschiedlich vorgesehen sein oder in manchen Bereichen vollständig weggelassen sein. Auch kann selbstverständlich das komplette Siebriemchen nur an der Oberseite oder aber an der Ober- und Unterseite mit abgeflachten Filamenten versehen sein. In jedem Fall ist es wichtig, dass die abgeflachte Oberfläche der Filamente in Richtung zum Faserbündel bzw. in Richtung der Auflagefläche der Führung des Siebriemchens, also der dem Faserbündel abgewandten Oberfläche des Siebriemchens zugewandt ist, um die entsprechende Wirkung zu erzielen. Gibt es darüber hinaus auch noch eine Abflachung, welche innerhalb der Ebene des Gewebes dem benachbarten Filament des Gewebes zugewandt ist, so ist dies zwar unschädlich, eine Wirkung auf die Bewegung, insbesondere die Relativbewegung des Faser Bündels oder den Verschleiß des Siebriemchens ist dabei aber nur gering.While it is important to the effect on yarn quality that the flattened surface be provided in the transport area of the wire mesh, it may be advantageous for the wire mesh itself if the flattened surface of the filaments is provided both in the fiber transport area and in the edge areas of the wire mesh are. There may be zones in which the surface of the filaments is not flattened and other zones in which it is flattened. Also, the flattening on the top and on the bottom can be provided differently or completely omitted in some areas. Also, of course, the complete Siebriemchen be provided only on the top or at the top and bottom with flattened filaments. In any case, it is important that the flattened surface of the filaments in the direction of the fiber bundle or in the direction of the support surface of the guide of the wire mesh, that faces away from the fiber bundle surface of the Siebriemchens to achieve the corresponding effect. If, in addition, there is also a flattening, which faces the adjacent filament of the fabric within the plane of the fabric, this is harmless, an effect on the movement, in particular the relative movement of the fiber bundle or the wear of the Siebriemchens is but only small.

In einer besonders vorteilhaften Ausführung der Erfindung ist da die Oberfläche des Siebriemchens zumindest im Fasertransportbereich durch eine spanende Bearbeitung, insbesondere durch Schleifen, geglättet. Die ursprünglich mit einer runden Oberfläche versehenen Filamente des Gewebes werden dabei abgetragen, so dass eine abgeflachte Oberfläche entsteht.In a particularly advantageous embodiment of the invention, since the surface of the Siebriemchens at least in the fiber transport area by machining, in particular by grinding, smoothed. The originally provided with a round surface filaments of the fabric are thereby removed, so that a flattened surface is formed.

Ist die Oberfläche der Filamente zumindest im Fasertransportbereich kalandriert, so wird hierdurch beispielsweise mittels einer Wärmeeinwirkung bewirkt, dass die Querschnitte der Filamente verändert werden und hierdurch eine abgeflachte Oberfläche aufweisen.If the surface of the filaments is calendered at least in the fiber transport region, this causes, for example, by means of a heat action, that the cross sections of the filaments are changed and thus have a flattened surface.

In einer weiteren vorteilhaften Ausführung der Erfindung sind die in dem Gewebe, insbesondere in dem Fasertransportbereich, verwendeten Filamente profiliert. Dabei werden Filamente verwendet, welche bereits bei ihrer Produktion oder einer entsprechenden Nachbearbeitung vor der Herstellung des Gewebes ein unrundes Profil aufweisen. Das Profil ist dabei derart, dass es zumindest eine abgeflachte Fläche im Querschnitt des Filaments aufweist. Durch eine entsprechende Verarbeitung zu einem Gewebe kann sodann ein Gewebe erzeugt werden, welches eine abgeflachte Oberfläche aufweist.In a further advantageous embodiment of the invention, the filaments used in the fabric, in particular in the fiber transport region, are profiled. In this case, filaments are used which have a non-round profile already during their production or a corresponding post-processing prior to the production of the fabric. The profile is such that it has at least one flattened surface in the cross section of the filament. By appropriate processing into a fabric, a fabric can then be produced which has a flattened surface.

Die profilierten Filamente weisen vorzugsweise einen abgeflachten, insbesondere ovalen oder elliptischen oder im Wesentlichen rechteckigen Querschnitt auf. Hierdurch kann ein im Gegensatz zu einem kreisrunden Querschnitt abgeflachter Querschnitt erzeugt werden, welcher bei einer entsprechenden Verwendung in dem Gewebe des Siebriemchens zu einer abgeflachten Oberfläche des Gewebes und damit des Siebriemchens führt.The profiled filaments preferably have a flattened, in particular oval or elliptical or substantially rectangular cross section. In this way, in contrast to a circular cross-section, a flattened cross-section can be produced which, when used appropriately in the fabric of the wire mesh, leads to a flattened surface of the fabric and thus of the wire mesh.

In einer bevorzugten Ausführung der Erfindung weisen die Filamente einen Durchmesser zwischen 30µm und 400µm auf. Hierdurch können feine und grobe Faserbündel verarbeitet werden. In einer besonders bevorzugten Ausführung weisen die Filamente einen Durchmesser zwischen 80µm 300µm auf. Diese Querschnittsdurchmesser bewirken den besten Kompromiss zwischen einer guten Garnherstellung und einem verschleißfesten Siebriemchen.In a preferred embodiment of the invention, the filaments have a diameter between 30 .mu.m and 400 .mu.m. This allows fine and coarse fiber bundles are processed. In a particularly preferred embodiment, the filaments have a diameter of between 80 μm and 300 μm. These cross-sectional diameters provide the best compromise between good yarn production and a wear-resistant wire bond.

Vorzugsweise beträgt die besaugte Freifläche im Fasertransportbereich zwischen 10% und 45% des Siebriemchens in dessen Fasertransportbereich. Damit wird eine ausreichend starke Saugkraft auf das Faserbündel erzeugt, welche es an das Siebriemchen angedrückt und andererseits aber auch noch die Relativbewegung des Faserbündels zulässt.Preferably, the evacuated flank area in the fiber transport area is between 10% and 45% of the wire mesh in its fiber transport area. Thus, a sufficiently strong suction force is generated on the fiber bundle, which it pressed against the wire mesh and on the other hand, but also still allows the relative movement of the fiber bundle.

In einer bevorzugten Ausführung der Erfindung sind die Filamente zumindest im Fasertransportbereich in den Kreuzungspunkten des Gewebes miteinander verschmolzen und/oder verpresst oder mittels eines Formschlusses miteinander verbunden. Hierdurch wird eine zusätzliche Festigkeit des Gewebes erzeugt, welche ein Verschieben des Gewebes verhindert und somit für eine lange gleichbleibende Qualität beim Kompaktieren des Faserbündels sorgt.In a preferred embodiment of the invention, the filaments are fused together at least in the fiber transport region in the crossing points of the fabric and / or pressed or connected to each other by means of a positive connection. As a result, an additional strength of the fabric is produced, which prevents displacement of the fabric and thus ensures a long consistent quality when compacting the fiber bundle.

Ist das Siebriemchen zumindest an den Kreuzungsstellen der Filamente mit einer Beschichtung, insbesondere mit einem Polymer ausgeführt, so erfolgt hierdurch in ganz besonders vorteilhafter Weise eine Verrundung der Filamente und der Maschenöffnungen bzw. Freiflächen des Gewebes. Durch diese Verrundung wird der Verschleiß des Siebriemchens, der Transport des Faserbündels und die Beweglichkeit des Faserbündels quer zum Siebriemchen weiter verbessert. Die Beschichtung fließt dabei an den Kreuzungsstellen zwischen die Filamente und bildet eine hautartige Schicht. Gleichzeitig kann bewirkt werden, dass die Filamente durch die Beschichtung miteinander verkleben und somit eine zusätzliche Festigkeit des Gewebes erreicht wird. Die Beschichtung kann vor und/oder nach der Abflachung der Filamente aufgebracht werden.If the wire mesh is provided with a coating, in particular with a polymer, at least at the intersection points of the filaments, a rounding of the filaments and of the mesh openings or free surfaces of the fabric takes place in a particularly advantageous manner. By this rounding the wear of the Siebriemchens, the transport of the fiber bundle and the mobility of the fiber bundle across the Siebriemchen is further improved. The coating flows at the crossing points between the filaments and forms a skin-like layer. At the same time it can be effected that the filaments stick together by the coating and thus an additional strength of the fabric is achieved. The coating can be applied before and / or after the flattening of the filaments.

Vorzugsweise sind die Filamente an den Randbereichen des Siebriemchens miteinander verschmolzen oder verklebt, um ein Zerfransen des Siebriemchens zu vermeiden. Der Haltbarkeit des Siebriemchens wird dadurch verbessert. Als Randbereich gilt der Bereich, der sich außerhalb des Bereichs befindet, unter dem der Saugschlitz seine Saugkraft auf das Faserbündel ausübt. Das Verschmelzen oder Verkleben kann auch derart erfolgen, dass keine oder kaum eine Saugkraft durch das Siebriemchen hindurch mehr aufgebracht werden kann. Das Siebriemchen kann in diesen Bereichen ganz oder nahezu dicht sein.Preferably, the filaments are fused or glued together at the edge regions of the wire mesh in order to avoid fraying of the wire mesh. The durability of the Siebriemchens is thereby improved. The border area is the area which is outside the area under which the suction slot exerts its suction force on the fiber bundle. The fusing or gluing can also take place in such a way that no or barely a suction force can be applied through the wire mesh more. The sieve strap can be completely or almost dense in these areas.

Weitere Vorteile der vorliegenden Erfindung sind in den nachfolgenden Ausführungsbeispielen beschrieben. Es zeigt:

Figur 1
einen Ausschnitt eines feinen, herkömmlichen Siebriemchens mit einem Faserbündel über einem Saugschlitz,
Figur 2
einen Ausschnitt eines groben, herkömmlichen Siebriemchens mit einem Faserbündel über einem Saugschlitz,
Figur 3
ein erfindungsgemäßes Siebriemchen mit einem Faserbündel über einem Saugschlitz und
Figur 4
eine schematische Darstellung eines erfindungsgemäßen Siebriemchens über einem Saugrohr mit einem Saugschlitz.
Further advantages of the present invention are described in the following exemplary embodiments. It shows:
FIG. 1
a section of a fine, conventional Siebriemchens with a fiber bundle on a suction slot,
FIG. 2
a section of a coarse, conventional Siebriemchens with a fiber bundle on a suction slot,
FIG. 3
an inventive Siebriemchen with a fiber bundle on a suction slot and
FIG. 4
a schematic representation of a Siebriemchens invention over a suction tube with a suction slot.

Um die Erfindung besser zu verstehen, sind die Vorgänge auf der Oberfläche eines Siebriemchens 1 in einer Makroperspektive dargestellt. Figur 1 zeigt einen Ausschnitt eines Saugschlitzes 2 mit dem darüber liegenden herkömmlichen feinen Siebriemchen 1 und einem darauf angeordneten Faserbündel 3. Durch die Neigung des Saugschlitzes 2 in Bezug auf die Bewegungsrichtung B des Siebriemchens 1 wird eine mechanische Verdichtung des Faserbündels 3 erreicht. Das Faserbündel 3 befindet dabei auf einer Seite bzw. an einem Rand des Saugschlitzes 2. Da das Faserbündel 3 durch den Saugluftstrom S auf die Oberfläche des Siebriemchens 1 gedrückt wird und das Faserbündel 3 voluminös und elastisch ist, taucht es teilweise in die durch die Bindung des Gewebes bedingten Vertiefungen ein. Erfährt das Faserbündel 3 nun durch die Neigung des Saugschlitzes 2 eine seitliche Relativbewegung R, so muss das Faserbündel 3 die Erhöhungen des Gewebes überwinden. Wie die Darstellung der Figur 1 vermuten lässt, ist das Überwinden der bindungsbedingten Erhöhungen bei der dargestellten Ausführung noch kein sehr großes Problem.To better understand the invention, the operations on the surface of a wire mesh 1 are shown in a macro-perspective. FIG. 1 shows a section of a suction slot 2 with the overlying conventional fine Siebriemchen 1 and a fiber bundle arranged thereon 3. Due to the inclination of the suction slot 2 with respect to the direction of movement B of the wire mesh 1, a mechanical compression of the fiber bundle 3 is achieved. The fiber bundle 3 is located on one side or at an edge of the suction slot 2. Since the fiber bundle 3 by the suction air flow S is pressed onto the surface of the wire mesh 1 and the fiber bundle 3 is bulky and elastic, it partially immersed in the conditional by the binding of the tissue depressions. If the fiber bundle 3 now experiences a lateral relative movement R due to the inclination of the suction slot 2, then the fiber bundle 3 must overcome the elevations of the fabric. Like the representation of the FIG. 1 Assuming that overcoming the bond-related increases in the illustrated embodiment is not a very big problem.

Deutlich anders ist die Situation bei einem Siebriemchen 1 mit einem groben, beispielsweise 150 µm dicken Filament. Die Situation ist in Figur 2 dargestellt. Das Faserbündel 3 taucht tief in die durch die Bindung bedingten Vertiefungen des Gewebes ein. Um das Faserbündel 3 seitlich zu verschieben, ist ein erhöhter Widerstand zu überwinden.Clearly different is the situation with a Siebriemchen 1 with a coarse, for example, 150 micron thick filament. The situation is in FIG. 2 shown. The fiber bundle 3 dives deep into the tissue-induced depressions of the tissue. To move the fiber bundle 3 laterally, an increased resistance is overcome.

Neben dem in den Figuren 1 und 2 dargestellten Einfluss der Bindung auf die seitliche Bewegungsmöglichkeit des bereits verdichteten Faserbündels 3 ist die Gewebestruktur auch beim Auftreffen des Faserbündels 3 auf das Siebriemchen 1 von Bedeutung. Ein vom nicht dargestellten Ausgangswalzenpaar des Streckwerks kommender, breiter Faserstrom muss über die Erhöhungen des Gewebes hinweg zu einem kompakten Faserbündel 3 zusammengefasst werden. Die Erhöhungen des Gewebes wirken sich auch hierbei nachteilig aus.In addition to the in the Figures 1 and 2 the influence of the binding on the lateral movement possibility of the already compacted fiber bundle 3, the fabric structure is also important when the fiber bundle 3 strikes the wire mesh 1. A broad fiber stream coming from the pair of drawing rollers, not shown, of the drafting system must be combined over the elevations of the fabric to form a compact fiber bundle 3. The elevations of the tissue also have a disadvantageous effect here.

In Figur 3 ist ein Ausschnitt eines erfindungsgemäßen Siebriemchens 1 dargestellt. Die einzelnen Filamente des Siebriemchens sind an ihrer Oberfläche bzw. an der Ober- und Unterseite des Siebriemchens 1 im Bereich ihrer Bindung abgeflacht. Einzelne der Abflachungen 6 sind in der Figur 3 eingezeichnet und markiert. Der Widerstand des Faserbündels 3 bei einer Relativbewegung R ist bei dieser Ausführung deutlich geringer als bei den Ausführungen gemäß Figur 1 oder insbesondere der Figur 2. Die Erfindung reduziert nun die durch die Bindung bedingten Erhöhungen eines herkömmlichen Gewebes auch bei Verwendung eines groben Filaments auf ein Minimum. Die Freiflächen 5 können dabei im Wesentlichen gleich bleiben.In FIG. 3 a section of a Siebriemchens invention 1 is shown. The individual filaments of the wire mesh are flattened on their surface or on the top and bottom of the wire mesh 1 in the region of their bond. Some of the flats 6 are in the FIG. 3 drawn in and marked. The resistance of the fiber bundle 3 with a relative movement R is significantly lower in this embodiment than in the embodiments according to FIG FIG. 1 or in particular the FIG. 2 , The invention now reduces the bond-related elevations of a conventional one Tissue even when using a coarse filament to a minimum. The open spaces 5 can remain essentially the same.

Die Reduzierung der Erhöhungen bzw. das Abflachen der Filamente kann durch ein Kalandrieren des Siebriemchens 1 oder ein ähnliches, in der Auswirkung gleichartiges Verfahren, erreicht werden. Möglich sind beispielsweise:

  • Kalandrieren des Siebriemchens 1 zwischen zwei Walzen, welche vorzugsweise beheizt sind
  • Kalandrieren des Siebriemchens 1 durch Ultraschall mittels Sonotroden
  • Kalandrieren des Siebriemchens durch Strahlung, vorzugsweise durch Wärmestrahlung
  • Abtragen der Erhöhungen durch zum Beispiel Abschleifen der Siebriemchen 1 auf der Ober- und/oder Unterseite.
The reduction of the elevations or the flattening of the filaments can be achieved by calendering the wire mesh 1 or a similar, similar in effect method. Possible, for example:
  • Calendering of the wire mesh 1 between two rolls, which are preferably heated
  • Calendering of the Siebriemchens 1 by ultrasound by sonotrodes
  • Calendering the Siebriemchens by radiation, preferably by thermal radiation
  • Ablating the increases by, for example, grinding the Siebriemchen 1 on the top and / or bottom.

Grundsätzlich ist ein Abflachen der Oberseite des Siebriemchens 1 ausreichend, um einen Vorteil gegenüber herkömmlichen Siebriemchen zu erzielen. Das partielle Abflachen des Fadentransportbereichs ist eine weitere Herstellungsmöglichkeit - während das Gewebe neben dem Fadentransportbereich ohne Abflachung 6 ist. Hiervon abweichend kann es sich, bedingt durch das Fertigungsverfahren und die Absicht weitere Vorteile zu erzielen, ergeben, dass das Siebriemchen 1 sowohl auf der Ober- als auch der Unterseite und über die gesamte Breite abgeflacht wird. Auch ist es möglich, das Siebriemchen 1 nur partiell im Fadentransportbereich - entweder nur auf der Oberseite oder auf der Ober- und Unterseite - abzuflachen.Basically, a flattening of the top of Siebriemchens 1 is sufficient to achieve an advantage over conventional Siebriemchen. The partial flattening of the yarn transport area is another production possibility - while the fabric is adjacent to the yarn transport area without flattening 6. Deviating from this, it may be due to the manufacturing process and the intention to achieve further advantages, that the wire mesh 1 is flattened on both the top and the bottom and across the entire width. It is also possible to flatten the wire mesh 1 only partially in the yarn transport area - either only on the top or on the top and bottom.

Falls es beim Abflachen, insbesondere beim Kalandrieren zu einem Anschmelzen der Filamente an den Kreuzungspunkten des Gewebes kommt, wird außerdem eine Verbesserung der Verschiebefestigkeit des Siebriemchens 1 erreicht.If flattening, in particular calendering, leads to a melting of the filaments at the crossing points of the fabric, In addition, an improvement in the displacement resistance of Siebriemchens 1 is achieved.

Denkbar ist auch, einen vergleichbaren Effekt durch das Verweben eines Profilfilaments zu erreichen.It is also conceivable to achieve a comparable effect by weaving a profile filament.

Durch die Erfindung ist es möglich, Siebriemchen 1 aus groben Geweben einzusetzen und Filamente mit großen Durchmessern zu verwenden. Die Forderungen nach einer guten Garnqualität, einer langen Standzeit und einem hohen energetischen Wirkungsgrad werden gleichzeitig erfüllt. Durch das Abflachen der Filamente wird trotz des groben Gewebes eine Verbesserung der Beweglichkeit des Faserbündels erreicht, welche die Eigenschaften eines feinen Gewebes noch übertreffen kann.By the invention it is possible to use Siebriemchen 1 of coarse fabrics and to use filaments with large diameters. The demands for a good yarn quality, a long service life and a high energy efficiency are met simultaneously. By flattening the filaments, despite the coarse tissue, an improvement in the mobility of the fiber bundle is achieved, which can exceed the properties of a fine tissue.

Figur 4 zeigt einen Abschnitt eines Saugrohres 4, um welches das Siebriemchen 1 geführt ist. Das Siebriemchen 1 ist in der Bewegungsrichtung B mittels einer nicht dargestellten Klemmwalze angetrieben. Dabei gleitet es mit seiner Unterseite über die Oberfläche des feststehenden Saugrohres 4. Das Faserbündel 3 gelangt nach einem nicht dargestellten Ausgangswalzenpaares eines Streckwerkes auf das in der Figur 4 rechts dargestellte Ende des Saugschlitzes 2 und wird zusammen mit dem Siebriemchen 1 in Bewegungsrichtung B befördert. Der Saugschlitz 2 ist mit Unterdruck besaugt. Dieser Saugluftstrom S strömt durch die Freiflächen 5 des Siebriemchens 1 und hält das Faserbündel 3 auf dem Siebriemchen 1 fest. Dadurch, dass der Saugschlitz 2 zur Bewegungsrichtung B schräg gestellt ist, erfährt das Faserbündel 3 eine Relativbewegung in Richtung des Pfeiles R senkrecht zur Bewegungsrichtung B des Siebriemchens 1. Hierdurch rollt bzw. gleitet das Faserbündel 3 quer zur Bewegungsrichtung B des Siebriemchens 1. FIG. 4 shows a portion of a suction tube 4, around which the Siebriemchen 1 is guided. The wire mesh 1 is driven in the direction of movement B by means of a pinch roller, not shown. It slides with its underside over the surface of the fixed suction pipe 4. The fiber bundle 3 passes to a not shown pair of output rollers of a drafting on the in the FIG. 4 shown right end of the suction slot 2 and is transported together with the wire mesh 1 in the direction of movement B. The suction slot 2 is vacuumed with negative pressure. This suction air stream S flows through the open spaces 5 of the wire mesh 1 and holds the fiber bundle 3 on the wire mesh 1 firmly. Due to the fact that the suction slot 2 is inclined to the direction of movement B, the fiber bundle 3 undergoes a relative movement in the direction of the arrow R perpendicular to the direction of movement B of the wire mesh 1. As a result, the fiber bundle 3 rolls or slides transversely to the direction of movement B of the wire mesh 1.

Durch die erfindungsgemäße Formgebung des Siebriemchens 1 in dem Fasertransportbereich F, in welchem sich das Faserbündel 3 befindet, wird der Widerstand des Siebriemchens 1 auf das Faserbündel 3 reduziert. Hierdurch wird ein besseres Garn erzeugt bei gleichzeitig geringerem Verschleiß des Siebriemchens 1. Der Fasertransportbereich F befindet sich im Wesentlichen in dem Bereich des Siebriemchens 1, welcher über dem Saugschlitz 2 angeordnet ist, bzw. in dem Bereich, wo das Faserbündel 3 auf das Siebriemchen 1 auftrifft bis zu dem Punkt, an welchem das Faserbündel 3 das Siebriemchen wieder verlässt. Die seitlichen Bereiche außerhalb des Fasertransportbereiches 11 können ebenfalls, wie in Figur 3 dargestellt, mit abgeflachten Filamenten versehen sein. Alternativ ist es aber auch möglich, die Filamente des Randbereiches herkömmlich, d.h. mit einem beispielsweise runden Querschnitt, zu belassen.The inventive design of the wire mesh 1 in the fiber transport region F, in which the fiber bundle 3 is located, reduces the resistance of the wire mesh 1 to the fiber bundle 3. hereby The fiber transport region F is located substantially in the region of the wire mesh 1, which is arranged above the suction slot 2, or in the region where the fiber bundle 3 impinges on the wire mesh 1 to the point where the fiber bundle 3 leaves the wire mesh again. The lateral areas outside the fiber transport area 11 can also, as in FIG. 3 shown to be provided with flattened filaments. Alternatively, it is also possible to leave the filaments of the edge region conventionally, ie with a, for example, round cross-section.

Die Filamente weisen in der Regel einen Durchmesser zwischen 30µm und 400µm, vorzugsweise zwischen 80µm und 300µm auf. Die Freifläche 5 beträgt im Fasertransportbereich F vorzugsweise zwischen 10% und 45%.The filaments generally have a diameter between 30 .mu.m and 400 .mu.m, preferably between 80 .mu.m and 300 .mu.m. The free surface 5 in the fiber transport region F is preferably between 10% and 45%.

Die vorliegende Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt. Es ist eine Vielzahl anderer Formen, insbesondere verschiedene Abflachungen 6 der Filamente, von der vorliegenden Erfindung mit abgedeckt. Wesentlich ist hierbei, dass die Filamente gegenüber einem runden Querschnitt einen Querschnitt aufweisen, welcher die Querbewegung des Faserbündels 3 auf dem Gewebe mit weniger Widerstand ermöglicht.The present invention is not limited to the illustrated embodiments. There are a variety of other shapes, in particular different flattenings 6 of the filaments, covered by the present invention. It is essential here that the filaments have a cross-section relative to a round cross-section, which allows the transverse movement of the fiber bundle 3 on the fabric with less resistance.

Claims (11)

  1. A lattice apron for a condensing device of a spinning machine, comprising a mesh made of filaments and perforated at least in a fiber transport region (F) of the lattice apron (1) having a defined free surface area (5) of at least 10% in order to, when the lattice apron (1) is operating, be able to allow a suction air flow (S) to act on a fiber bundle (3) moving thereon and the lattice apron (1) is having a top side and a bottom side, characterized in that a surface area of the filaments making contact with the fiber bundle (3) is implemented at least in the fiber transport region (F) in a flattened manner in comparison to a round surface in order to allow easier motion of the fiber bundle (3) on the surface of the lattice apron (1) in contrast to round surfaces and that the flattened surface is provided on the top side or on the top side and bottom side of the lattice apron (1).
  2. The lattice apron according to the preceding claim, characterized in that the flattened surface is provided in the fiber transport region (F) or in the fiber transport region (F) and the edge regions of the lattice apron (1).
  3. The lattice apron according to any one or more of the preceding claims, characterized in that the surface area of the filaments is smoothed by means of a machining operation, particularly by grinding, at least in the fiber transport region (F).
  4. The lattice apron according to any one or more of the preceding claims, characterized in that the surface area of the filaments is calendered, at least in the fiber transport region (F).
  5. The lattice apron according to any one or more of the preceding claims, characterized in that the filaments comprise at least one flattened surface in the cross section of the filament.
  6. The lattice apron according to any one or more of the preceding claims, characterized in that the filaments comprise a flattened, particularly oval or elliptical or substantially rectangular cross section.
  7. The lattice apron according to any one or more of the preceding claims, characterized in that the filaments comprise a diameter between 30µm and 400µm, preferably between 80µm and 300µm.
  8. The lattice apron according to any one or more of the preceding claims, characterized in that the free surface area (5) in the fiber transport region (F) is between 10% and 45%.
  9. The lattice apron according to any one or more of the preceding claims, characterized in that the filaments at least in the fiber transport region (F) are fused and/or pressed together at the intersection points of the mesh.
  10. The lattice apron according to any one or more of the preceding claims, characterized in that at least at the intersection points the lattice apron (1) is filled by means of a coating (11), particularly by means of a polymer.
  11. The lattice apron according to any one or more of the preceding claims, characterized in that the filaments at the edge regions of the lattice apron (1) are fused or glued to each other in order to avoid fraying of the lattice apron (1).
EP14195936.1A 2013-12-05 2014-12-02 Screen apron for fibre-condensing guides Not-in-force EP2881500B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013113510.2A DE102013113510A1 (en) 2013-12-05 2013-12-05 lattice apron
DE102014106745.2A DE102014106745A1 (en) 2014-05-13 2014-05-13 lattice apron

Publications (2)

Publication Number Publication Date
EP2881500A1 EP2881500A1 (en) 2015-06-10
EP2881500B1 true EP2881500B1 (en) 2018-10-31

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ID=52015893

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14195938.7A Not-in-force EP2881501B1 (en) 2013-12-05 2014-12-02 Screen apron for fibre-condensing guides
EP14195936.1A Not-in-force EP2881500B1 (en) 2013-12-05 2014-12-02 Screen apron for fibre-condensing guides

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14195938.7A Not-in-force EP2881501B1 (en) 2013-12-05 2014-12-02 Screen apron for fibre-condensing guides

Country Status (4)

Country Link
EP (2) EP2881501B1 (en)
CN (2) CN104695067B (en)
BR (1) BR102014029546A2 (en)
IN (2) IN2014DE03384A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015111133A1 (en) * 2015-07-09 2017-01-12 Maschinenfabrik Rieter Ag Spinning machine, guide rod and straps
DE102021132482A1 (en) * 2021-12-09 2023-06-15 Rieter Components Germany Gmbh Compression device of a spinning machine as well as transport aprons and intermediate aprons

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH368083A (en) * 1959-03-24 1963-03-15 R & E Huber Ag Aprons for drafting devices in spinning machines and processes for their production
DE10325385A1 (en) * 2003-05-30 2004-12-23 Spindelfabrik Süssen Schurr, Stahlecker & Grill GmbH Woven air-permeable apron for drafting system with pneumatic sliver compacting has side region made impermeable by heat treatment of thermoplastic yarns
CN1584158B (en) * 2004-06-09 2010-12-08 无锡莱福纶生物材料有限公司 Grid absorbing ring for compact spinning
JP4774930B2 (en) * 2005-11-07 2011-09-21 株式会社豊田自動織機 Fiber bundle concentrator in spinning machine
DE102007023172A1 (en) * 2007-05-10 2008-11-13 Wilhelm Stahlecker Gmbh Conveyor belt for transporting pneumatic staple fiber bond in spinning machine i.e. ring spinning machine, has air-permeable fabric with filaments made of stainless steel and welded at cutting edges in boundary regions of fabric
DE202007013020U1 (en) * 2007-09-17 2007-11-22 Sefar Ag Siebriemchen for a drafting of a spinning machine and stretching device with a Siebriemchen
CN202347174U (en) * 2011-09-07 2012-07-25 常熟市迅达粉末冶金有限公司 Grid ring for antistatic compact spinning
JP5830726B2 (en) * 2011-11-08 2015-12-09 東レ・モノフィラメント株式会社 Flat section polyphenylene sulfide monofilament and industrial fabric

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN104695067B (en) 2018-08-24
EP2881501A1 (en) 2015-06-10
CN104695068B (en) 2017-11-24
EP2881501B1 (en) 2019-09-04
BR102014029546A2 (en) 2016-05-24
IN2014DE03385A (en) 2015-08-21
IN2014DE03384A (en) 2015-08-21
EP2881500A1 (en) 2015-06-10
CN104695067A (en) 2015-06-10
CN104695068A (en) 2015-06-10

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