EP2881501A1 - Screen apron for fibre-condensing guides - Google Patents

Abstract

A wire mesh for a compression device of a spinning machine, a fabric of intersecting filaments (10) and at least in a fiber transport region (F) of the wire mesh (1) open spaces (5) between the filaments (10) to a suction air flow (S) to let act on a moved fiber bundle (3). The surface of the fabric contacting the fiber bundle (3) has intersection points of the filaments (10) and rounded edges of the filaments (10) and / or the free surfaces (5), at least in the fiber transport region (F), around a crossing point, which is not leveled and not rounded edges to allow easier movement of the fiber bundle (3) on the surface of the Siebriemchens (1).

Description

A wire mesh for a compacting device of a spinning machine has a fabric of intersecting filaments and is provided with open spaces between the filaments at least in a fiber transport region of the wire mesh to allow a suction air flow 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. By pressing the Siebriemchens is subject to the stationary compression device wear on the bottom of the sieve, which determines the life of the sieve in most applications.

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.

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.

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.

• 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.

Object of the present invention is therefore to be able to achieve the best possible yarn quality with a wear-resistant Siebriemchen as possible.

The object is achieved with a Siebriemchen with the features of independent claim 1.

An inventive wire mesh is provided for a compacting device of a spinning machine, in particular a compacting or compact spinning machine. The wire mesh has a fabric of intersecting filaments, in particular of monofilaments. 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. The fiber transport region is seen transversely to the transport direction of the wire mesh, the region in which a fiber bundle, which is taken from the pair of output roller of the upstream drafting received on the Siebriemchen and discharged again at the discharge point, or in other words, the area that the fiber bundle by its relative movement transverse to the longitudinal direction of the Siebriemchens travels on the Siebriemchen. The fiber transport area is thus not defined solely by the transport movement of the fiber bundle. Because the fiber bundle usually also performs a relative movement transversely to the direction of movement of the wire mesh, the fiber transport region is also defined in terms of its width. 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 Siebriemchen has open spaces between the filaments. According to an advantageous embodiment, it is perforated with a defined free area 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 consists of the filaments of the fabric and is not used for the suction of the fiber bundle moved on the wire mesh, but for the retention of 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. 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 forms a ring which is placed around the guide or the suction tube and constantly transports the incoming fiber bundle.

According to the invention, the surface of the fabric contacting the fiber bundle has at least intersection points of the filaments which have been flattened in the fiber transport region and rounded edges of the filaments and / or the free surfaces. The bumps typically present in the intersections of the filaments of the fabric are in the practice of this invention the Siebriemchens leveled. As a result, in contrast to the filaments with a round surface in the region of the intersections to or not leveled intersections easier movement of the fiber bundle on the surface of the Siebriemchens allows. In this way and by the rounded edges of the filaments and / or the open spaces, a relative movement taking place, in particular, transversely to the direction of movement of the wire mesh can be carried out with less resistance. This can be a better yarn created and beyond the wear of Siebriemchens be reduced.

In a particularly advantageous embodiment of the invention, the flattened crossing points of the filaments and rounded edges of the filaments and / or the free surfaces are 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 that both on the top and on the underside of the Siebriemchens leveled intersections of the filaments and rounded edges of the filaments and / or the open spaces are provided. With this design, a particularly advantageous influence on the wear of the Siebriemchens to take.

It is particularly advantageous if the upper side and lower side of the wire mesh are differently leveled and / or rounded. As a result, the respective, different requirements of the two sides of the wire mesh can be addressed. The Siebriemchen is exposed on the underside in particular a friction against the storage and deflection of Siebriemchens. A related relatively large wear is the result. On the other hand, the top side of the wire mesh must be able to interact particularly well with the fibers moving and transported on it. So it may be advantageous that the underside of Siebriemchens less severely flattened crossing points than the top of Siebriemchens. The edges of the filaments and / or the open spaces may also need to be on the underside of the wire mesh not or only slightly rounded, since there are no transverse movements, but only a support on the bearing or deflection of the wire mesh and thus a flat contact exists.

Preferably, the leveled intersections of a new wire mesh effect a bearing ratio of more than 10%. This means that the fibers rest on more than 10% of the surface of the wire mesh or that the wire mesh rests on more than 10% of its surface on its underside, for example on the suction pipe. For the storage and deflection of the wire mesh on the suction pipe so that the surface pressure is reduced, which has a positive effect on the wear of the wire mesh.

If the support share at the top of the wire mesh is higher than at the bottom of the wire mesh or the support portion at the bottom of the wire mesh is smaller than at the top of the wire mesh, an improved surface with respect to the coefficient of friction is advantageously created. Adhesion-induced friction is reduced due to the smaller contact area.

In a particularly advantageous embodiment of the wire mesh, at least in the fiber transport region, the ratio of the sum of the areas of the leveled intersection points to the difference of the total area minus the free area is between 0.1 and 0.8. The leveled intersection points form surfaces on which the fibers contact the wire mesh or the wire mesh interacts with the bearing and deflection guide points. The sum of the areas of the entered crossing points is divided by the total area of the wire mesh or the fiber transport area, from which the free area of the wire mesh or the fiber transport area is subtracted. This quotient gives a value between 0.1 and 0.8. In a particularly advantageous embodiment, this value is approximately between when in contact with the intake manifold 0.2 and 0.3. Compared to the elastic fibers, it is advantageous if this value is greater than 0.3.

While it is important for the effect on the yarn quality that the flattened crossing points of the filaments and the rounded edges of the filaments and / or the flanks are provided in the transport area of the wire mesh, it may be advantageous for the wire mesh itself if the flattened intersections of the Filaments and the rounded edges of the filaments and / or the free surfaces are provided both in the fiber transport region and in the edge regions of the wire mesh. There may be zones in which the surface of the filaments is not flattened at the intersections 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 at the top or on the top and bottom with flattened filaments at the intersection. In any case, it is important that the flattened intersections of the filaments and the rounded edges of the filaments and / or the free surfaces in the direction of the fiber bundle or in the direction of the support surface of the guide of the wire mesh, so the fiber bundle facing away from the 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, but an effect on the movement, in particular the relative movement of the fiber bundle or the wear of the wire mesh is only slight ,

In a particularly advantageous embodiment of the invention, the surface of the wire mesh is at least in the fiber transport area by a machining, in particular by grinding, or leveled or calendered by means of a roller. The originally provided with a round surface Filaments of the tissue are removed in the region of the crossing points, so that a flattened surface is formed.

If the surface of the filaments is at least thermally leveled, in particular by means of an ultrasound sonotrode, in the fiber transport region, then the effect is that the cross sections of the filaments are changed, in particular in the region of the intersection points, and the tissue thereby has a flattened surface. Due to the thermal effect on the filaments not only the humps of the intersections are leveled, but also rounded at the same time.

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.

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. Aspect ratios of about 1 to 2, for example about 80x150 microns are advantageous.

In a preferred embodiment of the invention, the filaments have a diameter between 30 .mu.m and 400 .mu.m. As a result, fine and coarse fiber bundles can be processed. In a particularly preferred embodiment the filaments have a diameter between 80μm and 300μm. These cross-sectional diameters provide the best compromise between good yarn production and a wear-resistant wire bond.

In a particularly advantageous embodiment of the invention, the fabric of the wire mesh is woven from filaments of different diameters. It is advantageous that different diameters of the filaments are used in warp and weft. As a result, the size and shape of the intersection points cause different areas of the leveled intersections. These can have a positive effect in particular on the transverse movement of the fiber bundle on the surface of the wire mesh.

Preferably, the fabric is woven with a 1/1 canvas or twill weave. This means that the chain and the end change sides at each intersection. Although other twill weaves, such as 1/2, may also be used, the 1/1 weave or twill weave has been found to be particularly advantageous for the fabric of the wire stitch in conjunction with the present invention.

If the tissue has a mesh size of more than 100 μm, preferably more than 180 μm and less than 2500 μm, preferably less than 1000 μm, then a particularly advantageous effect with respect to the suction of the fiber bundle and the displaceability of the fiber bundle across the wire mesh is obtained. without allowing individual fibers to be sucked through the fabric.

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 a preferred embodiment of the invention, the filaments are fused together at least in the fiber transport region at the intersection of the fabric and / or pressed and / 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.

If the wire mesh is provided with a coating, in particular with a polymer, at least at the points of intersection of the filaments, a rounding of the flattened filaments and the mesh openings or open areas 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 leveling of the intersections of the filaments.

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.

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

einen Ausschnitt eines erfindungsgemäßen Siebriemchens mit einem Faserbündel über einem angedeuteten Saugschlitz,

Figur 4

eine schematische Darstellung eines erfindungsgemäßen Siebriemchens über einem Saugrohr mit einem Saugschlitz,

Figur 5

einen Ausschnitt eines Querschnitts eines Siebriemchens mit an der Außenfläche des Siebriemchens eingeebneten Kreuzungsstellen,

Figur 6

die Darstellung aus Figur 5 mit an der Außenseite und der Innenseite des Siebriemchens eingeebneten Kreuzungsstellen,

Figur 7

die Darstellung aus Figur 5 mit einer Beschichtung an äußeren Kreuzungsstellen,

Figur 8

die Darstellung aus Figur 6 mit einer Beschichtung an den äußeren und inneren Kreuzungsstellen,

Figur 9

gerundete Kanten der Filamente an den Kreuzungsstellen,

Figur 10

einen Ausschnitt eines Siebriemchens mit abgerundeten Kreuzungsstellen und abgerundeten Freiflächen und

Figur 11

eine Darstellung ähnlich Figur 10 mit unterschiedlichen Filamentdurchmessern.

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

a detail of a Siebriemchens invention with a fiber bundle on an indicated suction slot,

FIG. 4

a schematic representation of a Siebriemchens invention over a suction tube with a suction slot,

FIG. 5

a section of a cross section of a Siebriemchens with leveled at the outer surface of the Siebriemchens crossing points,

FIG. 6

the presentation FIG. 5 with intersections leveled on the outside and the inside of the sieve wire,

FIG. 7

the presentation FIG. 5 with a coating at outer intersections,

FIG. 8

the presentation FIG. 6 with a coating at the outer and inner intersections,

FIG. 9

rounded edges of the filaments at the crossing points,

FIG. 10

a section of a Siebriemchens with rounded intersections and rounded open spaces and

FIG. 11

a representation similar FIG. 10 with different filament diameters.

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 on an edge of the suction slit 2. Since the fiber bundle 3 is pressed by the suction air flow S on the surface of the wire mesh 1 and the fiber bundle 3 is voluminous and elastic, it partially immersed in the through the bond the tissue-related 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.

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.

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 draft rollers, not shown, of the drafting system must pass over the elevations the tissue are combined to form a compact fiber bundle 3. The elevations of the tissue also have a disadvantageous effect here.

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 minimizes the bond-related elevations of a conventional fabric even when using a coarse filament 10. The open spaces 5 can remain essentially the same.

• 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 10 can be achieved by calendering the wire mesh 1 or a similar process similar in effect. 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.

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.

If, during flattening, in particular during flattening, flattening under the effect of temperature or calendering, melting of the filaments 10 occurs at the crossing points of the fabric, an improvement in the resistance to displacement of the wire mesh 1 is also achieved.

It is also conceivable to achieve a comparable effect by weaving a profile filament.

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 10, an improvement in the mobility of the fiber bundle 3 is achieved despite the coarse tissue, which can exceed the properties of a fine tissue.

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 pair of output rollers, not shown 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.

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 against a lateral movement of the fiber bundle 3. 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 rests on the wire mesh 1 impinges up 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 10 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%.

In FIG. 5 is a section of a Siebriemchens 1 with flattened on the outside or top of Siebriemchens 1 filaments 10. The flats 6 are located at the intersections of the filaments 10 shot and chain. The usually resulting bumps are due to the flattening 6 reduced in height. The total height S _{0 of} the two filaments 10 is thereby reduced to the total height S ₁ . The embodiment of FIG. 5 further shows different diameters D ₁ and D _{2 of} the filaments 10 and 10 '. D ₁ is smaller than D ₂ . Accordingly, the sum of D ₁ and D _{2 is} the total height S ₀ .

oder $${\mathrm{\Delta D}}_{2\mathrm{A}}=\mathrm{0},\mathrm{25}*{\mathrm{D}}_{\mathrm{2}}\mathrm{bis}\mathrm{0},\mathrm{8}*{\mathrm{D}}_{\mathrm{2}}$$

oder $${\mathrm{\Delta D}}_{\mathrm{1}\mathrm{A}}=\mathrm{0},\mathrm{25}*{\mathrm{D}}_{\mathrm{1}}\mathrm{bis}\mathrm{0},\mathrm{8}*{\mathrm{D}}_{\mathrm{1}}$$

The flattenings 6 are formed by ablation or melting of the filaments 10. The filament 10 with the smaller diameter D ₁ is thereby reduced by the value ΔD _1A . The filament 10 having the original diameter D ₂ is reduced by ΔD _2A . It has proved to be advantageous if $${\mathrm{S}}_{\mathrm{0}}-{\mathrm{<figure-callout\; id="1"\; label="S"\; filenames="imgf0001.png"\; state="\{\{state\}\}">S</figure-callout>}}_{\mathrm{1}}=\mathrm{0}.\mathrm{25}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_2\mathrm{to}\mathrm{0}.\mathrm{8th}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_2$$

or $${\mathrm{.<figure-callout\; id="2"\; label="DELTA.D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{2\mathrm{A}}=\mathrm{0}.\mathrm{25}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}\mathrm{to}\mathrm{0}.\mathrm{8th}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}$$

or $${\mathrm{.<figure-callout\; id="1"\; label="DELTA.D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{\mathrm{1}\mathrm{A}}=\mathrm{0}.\mathrm{25}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}\mathrm{to}\mathrm{0}.\mathrm{8th}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}$$

oder $${\mathrm{\Delta D}}_{\mathrm{1}\mathrm{A}}=\mathrm{0},\mathrm{8}*{\mathrm{D}}_{\mathrm{1}}\mathrm{bis}\mathrm{0},\mathrm{3}*{\mathrm{D}}_{\mathrm{1}}$$

oder $${\mathrm{\Delta D}}_{\mathrm{2}\mathrm{A}}=\mathrm{0},\mathrm{8}*{\mathrm{D}}_{\mathrm{2}}\mathrm{bis}\mathrm{0},\mathrm{3}*{\mathrm{D}}_{\mathrm{2}}$$

oder $${\mathrm{\Delta D}}_{\mathrm{1}\mathrm{l}}=\mathrm{0},\mathrm{9}*{\mathrm{D}}_{\mathrm{1}}\mathrm{bis}\mathrm{0},\mathrm{4}*{\mathrm{D}}_{\mathrm{1}}$$

oder $${\mathrm{\Delta D}}_{\mathrm{2}\mathrm{l}}=\mathrm{0},\mathrm{9}*{\mathrm{D}}_{\mathrm{2}}\mathrm{bis}\mathrm{0},\mathrm{4}*{\mathrm{D}}_{\mathrm{2}}$$

In FIG. 6 is similar to in FIG. 5 a section of a Siebriemchens 1 shown in cross section, in which not only the top or outside of the Siebriemchens 1 is flattened, but also the inner or bottom of the Siebriemchens 1. The remaining total height is then S ₂ , since both the thinner Filament 10 and the thicker filament 10 is removed on both sides. On the outside, the removal is ΔD _1A or ΔD _2A . On the inside of the wire mesh 1, the removal is ΔD _1I or ΔD _2I . It is advantageous if $${\mathrm{<figure-callout\; id="2"\; label="S"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">S</figure-callout>}}_{\mathrm{2}}/{\mathrm{S}}_{\mathrm{0}}=\mathrm{0}.\mathrm{7}\mathrm{to}\mathrm{0}.\mathrm{3}$$

or $${\mathrm{.<figure-callout\; id="1"\; label="DELTA.D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{\mathrm{1}\mathrm{A}}=\mathrm{0}.\mathrm{8th}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}\mathrm{to}\mathrm{0}.\mathrm{3}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}$$

or $${\mathrm{.<figure-callout\; id="2"\; label="DELTA.D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{\mathrm{2}\mathrm{A}}=\mathrm{0}.\mathrm{8th}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}\mathrm{to}\mathrm{0}.\mathrm{3}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}$$

or $${\mathrm{.<figure-callout\; id="1"\; label="DELTA.D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{\mathrm{1}\mathrm{l}}=\mathrm{0}.\mathrm{9}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}\mathrm{to}\mathrm{0}.\mathrm{4}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}$$

or $${\mathrm{.<figure-callout\; id="2"\; label="DELTA.D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{\mathrm{2}\mathrm{l}}=\mathrm{0}.\mathrm{9}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}\mathrm{to}\mathrm{0}.\mathrm{4}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}$$

oder $${\mathrm{\Delta D}}_{2\mathrm{A}}=\mathrm{0},\mathrm{25}*{\mathrm{D}}_{\mathrm{2}}\mathrm{bis}\mathrm{0},\mathrm{8}*{\mathrm{D}}_{\mathrm{2}}$$

oder $${\mathrm{\Delta D}}_{\mathrm{1}\mathrm{A}}=\mathrm{0},\mathrm{25}*{\mathrm{D}}_{\mathrm{1}}\mathrm{bis}\mathrm{0},\mathrm{8}*{\mathrm{D}}_{\mathrm{1}}$$

In FIG. 7 is a section similar to the FIG. 5 shown. Only at the top of Siebriemchens 1 a flattening 6 is present. In order to obtain a gluing of the filaments 10 and a smooth and gradual transition between the filaments 10 of the warp and the weft, a coating 11 is arranged at the outer intersections. Thus, the fiber bundle 3 located on the wire mesh 1 does not sink so much into the depression next to the intersection points of the filaments 10. As with FIG. 5 it is advantageous if $${\mathrm{S}}_{\mathrm{0}}-{\mathrm{<figure-callout\; id="1"\; label="S"\; filenames="imgf0001.png"\; state="\{\{state\}\}">S</figure-callout>}}_{\mathrm{1}}=\mathrm{0}.\mathrm{25}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_2\mathrm{to}\mathrm{0}.\mathrm{8th}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_2$$

or $${\mathrm{.<figure-callout\; id="2"\; label="DELTA.D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{2\mathrm{A}}=\mathrm{0}.\mathrm{25}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}\mathrm{to}\mathrm{0}.\mathrm{8th}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}$$

or $${\mathrm{.<figure-callout\; id="1"\; label="DELTA.D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{\mathrm{1}\mathrm{A}}=\mathrm{0}.\mathrm{25}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}\mathrm{to}\mathrm{0}.\mathrm{8th}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}$$

oder $${\mathrm{\Delta D}}_{\mathrm{1}\mathrm{A}}=\mathrm{0},\mathrm{8}*{\mathrm{D}}_{\mathrm{1}}\mathrm{bis}\mathrm{0},\mathrm{3}*{\mathrm{D}}_{\mathrm{1}}$$

oder $${\mathrm{\Delta D}}_{\mathrm{2}\mathrm{A}}=\mathrm{0},\mathrm{8}*{\mathrm{D}}_{\mathrm{2}}\mathrm{bis}\mathrm{0},\mathrm{3}*{\mathrm{D}}_{\mathrm{2}}$$

oder $${\mathrm{\Delta D}}_{\mathrm{1}\mathrm{l}}=\mathrm{0},\mathrm{9}*{\mathrm{D}}_{\mathrm{1}}\mathrm{bis}\mathrm{0},\mathrm{4}*{\mathrm{D}}_{\mathrm{1}}$$

oder $${\mathrm{\Delta D}}_{\mathrm{2}\mathrm{l}}=\mathrm{0},\mathrm{9}*{\mathrm{D}}_{\mathrm{2}}\mathrm{bis}\mathrm{0},\mathrm{4}*{\mathrm{D}}_{\mathrm{2}}$$

According to the execution according to FIG. 8 Both sides of the Siebriemchens 1 are flattened. The coating 11 is accordingly arranged above and below at the intersections. As a result, a very stable strap 1 is obtained. It is advantageous if $${\mathrm{<figure-callout\; id="2"\; label="S"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">S</figure-callout>}}_{\mathrm{2}}/{\mathrm{S}}_{\mathrm{0}}=\mathrm{0}.\mathrm{7}\mathrm{to}\mathrm{0}.\mathrm{3}$$

or $${\mathrm{.<figure-callout\; id="1"\; label="DELTA.D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{\mathrm{1}\mathrm{A}}=\mathrm{0}.\mathrm{8th}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}\mathrm{to}\mathrm{0}.\mathrm{3}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}$$

or $${\mathrm{.<figure-callout\; id="2"\; label="DELTA.D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{\mathrm{2}\mathrm{A}}=\mathrm{0}.\mathrm{8th}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}\mathrm{to}\mathrm{0}.\mathrm{3}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}$$

or $${\mathrm{.<figure-callout\; id="1"\; label="DELTA.D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{\mathrm{1}\mathrm{l}}=\mathrm{0}.\mathrm{9}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}\mathrm{to}\mathrm{0}.\mathrm{4}*{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="imgf0001.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{1}}$$

or $${\mathrm{.<figure-callout\; id="2"\; label="DELTA.D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">DELTA.D</figure-callout>}}_{\mathrm{2}\mathrm{l}}=\mathrm{0}.\mathrm{9}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}\mathrm{to}\mathrm{0}.\mathrm{4}*{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">D</figure-callout>}}_{\mathrm{2}}$$

At the neck of the FIG. 9 are in addition to the coating 11 on the upper flattened 6 having side of the wire mesh 1 curves of the filaments 10 is provided. The curves with the radii R ₁ and R ₂ provide additional relief for the fiber bundle 3 held on the surface of the wire mesh 1, but also to be moved. Such curves can be obtained by a thermal treatment, for example by the use of ultrasonic sonotrodes.

Also the Siebriemchen 1 the FIGS. 5 to 8 have advantageously rounded off the flattenings 6. Sharp-edged transitions should at least be largely avoided. The flats 6 can be broken either by a thermal calendering at the edges. Alternatively, a coating 11 may be provided, which extend over the edges of the flattening 6 and thus also break the edges.

In FIG. 10 is a section of a plan view of a Siebriemchens 1 shown. The open spaces 5 are located between the intersections of the filaments 10. In FIG. 10 the same thickness of filaments 10 have been used, whereby the flats 6 are approximately equal at each of the intersections.

By using differently thick filaments 10 according to FIG. 11 the flats 6 are also different. The flattenings 6 'are smaller than the flattenings 6. This is due to the fact that the filaments 10' with the smaller diameter D ₁ receive a smaller area of the flattening 6 than the filaments 10 with a larger diameter D ₂ .

From the representations of FIGS. 10 and 11 In particular, it can be seen that the free surfaces 10 have rounded edges. The surfaces of the filaments 10 also have rounded edges on their flattenings 6 on, whereby the fiber bundle can be transported and moved very well. In the difference between FIG. 10 and FIG. 11 It is also clear that the open spaces 5 of the FIG. 10 are essentially round, while the open spaces of the FIG. 11 are substantially oval. This also results, inter alia, from the use of identical filaments 10 (FIG. FIG. 10 ) or differently thicker filaments 10 and 10 '( FIG. 11 ).

If the leveling with a thermal process so you can get the filling with appropriate tuning of the temperature, because the liquid plastic runs over the crossing points down. In a mechanical leveling the filling with z. As a polymer can be realized, which is painted over the fabric and collects in the "deepest" points.

By leveling, it is possible to use much stronger filaments 10, for example in the range 100 microns to 400 microns. Thus, the wear volume of the Siebriemchens 1, which grinds on the E-tube and is subjected to wear, especially on the inner surface, can be increased.

The flattened surface supports the fibers very well. In practice it turns out that it is therefore possible to switch to larger mesh sizes in the tissue. As a result, the throttle resistance is reduced for the sucked Kompaktierluft. With constant air flow, which is needed for compacting, the negative pressure can be reduced accordingly and thus energy saved.

The mesh size, that is, the edge length of the open spaces 5, can be increased from previously 90μm x90μm = 0.0081 mm ² with leveled Siebriemchen 1, for example, to 2-fold to 10-fold.

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 (18)

Siebriemchen for a compacting device of a spinning machine, comprising a fabric of intersecting filaments (10) and at least in a fiber transport region (F) of the wire mesh (1) open spaces (5) between the filaments (10) to a suction air flow (S) a fiber bundle (3) moved onto it, characterized in that the surface of the fabric contacting the fiber bundle (3) at least in the fiber transport region (F) has intersection points of the filaments (10) and rounded edges of the filaments (10) and / or Open spaces (5), in order to allow in contrast to non-leveled intersections and not rounded edges easier movement of the fiber bundle (3) on the surface of the Siebriemchens (1). Lattice apron according to the preceding claim, characterized in that the flattened crossing points of the filaments (10) and rounded edges of the filaments (10) and / or the open spaces (5) on the upper side or on the top and bottom of Siebriemchens (1) provided are. Siebriemchen according to one or more of the preceding claims, characterized in that the top and the bottom of the wire mesh (1) are differently flattened and / or rounded. Siebriemchen according to one or more of the preceding claims, characterized in that the flattened crossing points of a new Siebriemchens (1) form a carrying ratio of more than 10%. Lattice apron according to one or more of the preceding claims, characterized in that the supporting portion on the top of Siebriemchens (1) is higher than at the bottom of Siebriemchens (1). Siebriemchen according to one or more of the preceding claims, characterized in that at least in the fiber transport region (F), the ratio of the sum of the areas of the flattened crossing points to the difference of the total area minus the free area between 0.1 and 0.8. Siebriemchen according to one or more of the preceding claims, characterized in that the flattened crossing points of the filaments (10) and rounded edges of the filaments (10) and / or the free surfaces (5) in the fiber transport region (F) or in the fiber transport region (F) and the edge regions of the wire mesh (1) is provided. Siebriemchen according to one or more of the preceding claims, characterized in that the surface is at least in the fiber transport region (F) thermally flattened or calendered, in particular by means of an ultrasonic sonotrode or mechanically, in particular by a machining or by means of a roller. Siebriemchen according to one or more of the preceding claims, characterized in that the filaments (10) are profiled. Siebriemchen according to one or more of the preceding claims, characterized in that the filaments (10) have a flattened, in particular oval or elliptical or substantially rectangular cross-section. Lattice apron according to one or more of the preceding claims, characterized in that the filaments (10) have a diameter of between 30 .mu.m and 400 .mu.m, preferably between 80 .mu.m and 300 .mu.m. Siebriemchen according to one or more of the preceding claims, characterized in that the filaments (10) in warp and weft different diameters (D ₁ , D ₂ ). Siebriemchen according to one or more of the preceding claims, characterized in that the fabric is woven with 1/1 plain weave or 1/1 twill weave. Siebriemchen according to one or more of the preceding claims, characterized in that the fabric has a mesh size of more than 100 microns, preferably more than 180 microns and less than 2500 microns, preferably less than 1000 microns. Siebriemchen according to one or more of the preceding claims, characterized in that the free surface (5) in the fiber transport region (F) is between 10% and 45%. Siebriemchen according to one or more of the preceding claims, characterized in that the filaments (10) at least in the fiber transport region (F) merged with each other at the intersection of the fabric and / or pressed or are connected to each other by means of a positive connection. Siebriemchen according to one or more of the preceding claims, characterized in that the Siebriemchen (1) is filled at least at the intersection with a coating (11), in particular with a polymer. Siebriemchen according to one or more of the preceding claims, characterized in that the filaments (10) at the edge regions of the wire mesh (1) are fused or glued together to prevent fraying of the wire mesh (1).

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