EP2808429B1 - Wire for a roller of a carding machine - Google Patents

Description

The invention relates to a clothing wire for a roll of a carding machine. The clothing wire serves to produce a so-called all-steel clothing for a clothing roller.

Carding machines or carding machines are used to open (singulate) or align, to homogenize (in nonwoven production) and / or to parallelize (in yarn production) fibers of a fiber material, for example a wool, cotton or even synthetic fibers or a fiber mixture. , The carding process can be used to produce a batt of fibrous material. The batt consists of a loose composite of ordered individual fibers. From such a batt, for example, a nonwoven fabric can be produced. The batt results in carding by the fibers are removed and summarized by a designated as Tambour large set roller by means of a pick-up means.

The carding machine can have various clothing rollers. Each set roller is filled with approximately radially outward teeth, teeth, tips or the like. The number and / or size / or density of the teeth, teeth or tips, their shape and shape may vary.

The clothing rollers are usually provided with all-steel accessories. These consist of a profiled clothing wire which is wound under tension on the relevant clothing roller. The clothing wire has a foot portion and a blade portion. The foot portion may be rectangular or rectangular in cross section, for example be square. From the foot section of the blade section protrudes, in the use position approximately transversely to the lateral surface of the clothing roller. The blade section has a sawtooth profile to form the teeth or serrations. The clothing wire is wound around the outer surface of the clothing roller under longitudinal tension and the two ends are fastened to the clothing roller.

The all-steel clothing produced from the clothing wire should have the longest possible service life. It must not or only insignificantly damage the fibers and should allow optimum homogenization or parallelization of the fibers during the production of the batt.

Garnish wires are known per se. For example, describes CN 201512617U a clothing wire with obliquely inclined teeth on the blade section.

The out DE 40 38 352 A1 Known clothing wire has a foot portion and a blade portion with a sawtooth profile. The two side surfaces of the blade section are profiled. The profiling can be wavy or jagged. A similar clothing wire is also off DE 42 40 026 C2 known.

EP 1 408 142 A1 describes a clothing wire with a foot portion and a blade portion whose side surfaces may have differently shaped profilings. For example, a convexly raised profile may be present on one side surface, while a profile having concave depressions is provided on the respective other side surface.

FR 28 21 863 A1 describes a clothing wire with a foot portion and a blade portion with sawtooth profile. The teeth have recesses on their edges, so that the edges of each tooth are uneven. In one embodiment, the recesses in the edge of a tooth may continue in grooves on the adjacent side surface of the tooth.

GB 854 090 A describes a clothing wire, wherein the foot portion is formed on the one side surface with a recess and on the side surface with a corresponding elevation. In the position of use, the elevation on the foot section of a winding engages in the recess of the foot section of an adjacent winding of the clothing wire.

At the US 3,391,429 Known clothing wire, the side surfaces of the blade portion are considered corrugated or serrated viewed in cross section.

US Pat. No. 6,185,789 B1 discloses a clothing wire in which one side surface of the blade portion may be flat and the other side surface may be provided with a corrugated profile. Alternatively, it is also possible to carry out both side surfaces with such a wave profile.

WO 2011/138322 A1 describes a clothing wire whose blade portion may be formed with a flat side surface and a profiled side surface. As a profile, two semicircular convex elevations viewed in cross-section are provided on the side surface of the leaf section.

WO 94/05837 A1 proposes to provide a clothing wire whose surface can be made coated to increase the friction.

In WO 00/26450 a clothing wire is shown in which not the side surfaces but the toothbrushes, z. B. by trained teeth, are structured.

Out EP 2 508 658 A1 is a running in a wire length clothing wire known with a foot portion having a base for resting on a clothing roller. A flat blade portion protrudes from the root portion in a height direction perpendicular to the base surface, the blade portion has outer edges on the side remote from the root portion, which are serrated to form teeth on the blade portion, and the blade portion has a first blade portion side surface and a second blade portion side surface has, which extend from the foot portion respectively to the associated outer edge. At the narrow edges of the blade portion each protrusion is formed having an asymmetrical cross-sectional profile, wherein the cross-sectional profile of a projection has a rounded ridge from which a first flank and a second flank extend in different directions, the second flank closer to the foot portion is arranged as the first edge, and the length of the first edge is greater than the length of the second edge. Thus, the threads are held in the area of the tooth breasts, ie in the extension direction of the clothing wire in front of or behind a blade section.

Starting from these known clothing wires, it can be regarded as an object of the present invention to provide an improved clothing wire. In particular, an improved homogenization or parallelization of the fibers is to be achieved and their damage reduced. The wear of the clothing wire should be kept as low as possible.

This object is achieved by a clothing wire with the features of claim 1.

The extending in a wire longitudinal direction wire is particularly suitable for the picking and working rolls of carding machines. The clothing wire has a foot portion with a base surface, which serves for resting on the lateral surface of the roller of a carding machine. The foot section preferably has either an approximately rectangular cross-section or the cross-section of the foot section, usually in clothing wires whose foot portions are wider than 0.8 mm, on one side a (eg triangular-shaped) elevation and on the opposite side a geometric Corresponding depression, which ensures that in the position of use, the elevations / depressions of the foot sections of adjacent clothing wires engage with each other and interlock as a result form-fitting manner.

From the foot portion, a blade portion projects approximately at right angles to the base (i.e., approximately in a height direction perpendicular to the base of the foot portion). The blade portion has first and second (i.e., two) blade portion side surfaces connected by a tooth face on the side remote from the root portion. The leaf portion side surfaces adjoin the foot portion on one side thereof; on the side facing away from the foot portion, the two leaf portion side surfaces are bounded by serrated outer edges, which are formed by the contiguity of each one of the leaf portion side surfaces of the tooth face. Thus, the leaf section receives its jagged contour and forms teeth.

On at least one of the two leaf section side surfaces At least one projection is available. The at least one protrusion has a height in the direction of the width of the clothing wire (in the transverse direction, perpendicular to the wire longitudinal direction and perpendicular to the height direction) and extends in the wire longitudinal direction along the blade portion side, and usually completely between two spaces defining a tooth in the wire longitudinal direction of the clothing wire , It is advantageous if the geometry of the cross-sectional profile of the projection does not change on the blade side surfaces in the wire longitudinal direction.

According to the invention, the projection has an asymmetrical cross-sectional profile, d. h., The cross-sectional profile has neither an axis nor a point symmetry. The cross-sectional profiles of the projections conventional clothing wires have at least one axial symmetry. Preferably, the axis in question could be a solder that stands on a flat portion of the respective leaf portion side surface and pierces the vertex of the respective projection.

The cross-sectional profile of the projection has a rounded ridge from which a first flank and a second flank extend in different directions (but not diametrically). The second flank is located closer to the foot portion than the first flank. The end of the first flank facing away from the ridge usually coincides with the outer edge of the associated leaf section side surface, ie, the first flank ends with the outer edge. It is envisaged that the length of the second flank is smaller than the length of the first flank; the length of the second flank may be 10% to 30%, preferably 15% to 25%, of the total length of the protrusion corresponding to the sum of the lengths of the first and second flanks. This ensures that, at least on average, the first edge with respect to the associated leaf portion side surface is flatter than the second edge.

The length of the first flank, the second flank and the overall length of the protrusion are usually related to one of the two leaf portion side surfaces, i. that is, the lengths are defined as the projections on the respective leaf portion side surface. If one of the leaf section side surfaces runs, at least in certain areas, in one plane, the lengths are related (projected) to this plane. If both of the leaf section side surfaces run flat, at least in regions, then the plane which is the steepest on the base surface is selected as the reference / projection plane, ie. H. which has the smallest inclination angle (in relation to the perpendicular to the base) (it is 0 ° if the plane in question is perpendicular to the base).

It is also envisaged that the width of the clothing wire in the region of the highest point of the projection, d. H. at the location of the projection, at which the clothing wire has the maximum width, 20% to 50%, preferably 25% to 35% of the width of the foot section corresponds.

Due to the geometry of the at least one projection of the clothing wire according to the invention, it is achieved that during the carding process fibers are easier to penetrate (in the case of trimmings which are made using conventional clothing wires with symmetrical protrusions) into the clothing trimmings formed by the clothing wires according to the invention and fibers, who are already in the Garniturgassen experienced an increased holding power. Due to the increased holding power is to a large extent prevents, in particular smooth (eg siliconized) fibers from escaping too early from the clothing basins due to gravitational and / or centrifugal forces, ie an optimum proportion of the fibers enters the respective fabricating areas in the respectively provided area of the respective roller - or off. The material flow and the efficiency of the carding process are thus improved. The fibers are also damaged less (often and severely) and the wear of the clothing wire is permanently reduced, which is particularly advantageous in the processing of (for example, using titanium oxide) matted fibers, which in principle cause high wear.

In order to ensure a gentle processing of the fibers, the projection can be formed paragraph and edgeless, d. h., both the ridge and all transitions are rounded.

In a preferred embodiment, the at least one projection is arranged exclusively on the second leaf section side surface; preferably exactly one projection is arranged there. However, it is also possible to arrange exactly one projection on the first sheet section side surface.

The Blattabschnittsseitenflächen can in principle run arbitrarily bent. However, it is provided that in the areas where there is no projection, the leaf portion side surfaces are flat, ie, the first leaf portion side surface extends in the areas where there is no projection in a first plane and the second accordingly in a second Level.

In a preferred embodiment, both the first flank and the second flank of the at least one projection have rectilinear regions. In this case, it is advantageous if the amount of the angle which the tangent of the rectilinear region of the first flank encloses with the first or second plane of the respective leaf section side surface adjoining the at least one projection is smaller than the magnitude of the angle which the tangent of the rectilinear portion of the second flank including the plane in question.

But it is also conceivable that the flanks do not run straight at any point, d. H. are completely rounded.

In an advantageous embodiment, the first leaf section side surface is oriented perpendicular to the base surface of the foot section, and the plane of the second leaf section side surface is aligned with the first leaf section side surface, e.g. B. by about 8 °, inclined, d. H. the second leaf section side surface has an inclination angle of about 8 °. When the teeth of the clothing wire are punched, as is conventional, the (semi-finished) clothing wire for performing the punching operation can be guided more easily (lower manufacturing cost) since the first blade portion side surface is perpendicular to the ground surface.

Alternatively, the first sheet portion side surface and the second sheet portion side surface may be inclined toward each other, wherein e.g. For example, the amount of the angle that the first leaf portion side surface includes with the bottom surface of the foot portion and the amount of the angle that the second leaf portion side surface includes with the bottom surface are equal, ie, the leaf portion side surfaces are mirror-symmetrical (to the plane through the height and wire longitudinal direction) inclined. These clothing wires should, especially if the foot section is mirror-symmetrical, can be rolled more easily.

In the position of use the Garniturgasse is formed between two wound on the outer surface of a clothing roller, adjacent windings of Garniturdrahtes and in particular between the two blade sections of the immediately adjacent windings. By means of the at least one projection on at least one leaf section side surface, this clothing yarn is reduced in width.

At the foot portion each side surface is present on opposite sides adjacent to the base. The one side surface can thereby pass smoothly and / or without offset and / or edgeless into the first leaf section side surface of the leaf section. Preferably, a shoulder is formed between the other side surface and the second side portion of the sheet portion defining (in the underlying portion) the width of the package between two adjacent wire portions and two adjacent portions of sheet with the clothing wire wound on the clothing roller.

The side surfaces of the foot section serve as contact surfaces in the position of use. Two immediately adjacent windings of the clothing wire are then adjacent to each other with associated side surfaces of their foot sections.

Preferably, the clothing wire is made by a rolling process. The teeth on the blade portion can then be formed by punching or other separation process. The at least one projection on at least one leaf section side surface is already generated during the rolling process.

• Figur 1 eine schematische Ansicht einer Garniturwalze mit einer Ganzstahlgarnitur,
• Figur 2 eine perspektivische Darstellung eines Abschnitts eines Ausführungsbeispiels eines erfindungsgemäßen Garniturdrahtes,
• Figur 3 den Querschnitt längs der in h und q verlaufenden Ebene durch den für das Ausführungsbeispiel des Garniturdrahtes aus Figur 2 verwendeten Rohdrahtes (Draht vor Einbringen der Zähne),
• Figur 4a Bemaßung des Ausführungsbeispiels des Garniturdrahtes, Querschnittsdarstellung wie in Figur 3,
• Figur 4b eine Teildarstellung des Garniturdrahtes im Querschnitt im Bereich des Vorsprungs,
• Figur 5 eine schematische Darstellung der Anordnung mehrerer nebeneinander liegender Wicklungen des Garniturdrahtes gemäß dem Ausführungsbeispiel der Figuren 2 bis 4,
• Figur 6 eine schematische Darstellung mehrerer nebeneinander angeordneter Wicklungen eines abgewandelten Ausführungsbeispiels eines Garniturdrahtes,
• Figur 7 Garniturdraht mit zwei Vorsprüngen an der zweiten Blattabschnittsseitenfläche in Querschnittsdarstellung,
• Figur 8 Garniturdraht mit jeweils zwei Vorsprüngen an der ersten und der zweiten Blattabschnittsseitenfläche in Querschnittsdarstellung und
• Figur 9 Garniturdraht mit je einem unsymmetrischen und einem symmetrischen Vorsprung an der zweiten Blattabschnittsseitenfläche in Querschnittsdarstellung.

Advantageous embodiments of the invention will become apparent from the dependent claims and the description. The description is limited to essential features of the invention. The drawing is to be used as a supplement. Embodiments of the invention will be explained in more detail with reference to the accompanying drawings. Show it:

• FIG. 1 a schematic view of a clothing roller with an all-steel clothing,
• FIG. 2 a perspective view of a portion of an embodiment of a clothing wire according to the invention,
• FIG. 3 the cross section along the plane running in h and q by that for the embodiment of the clothing wire FIG. 2 used raw wire (wire before inserting the teeth),
• FIG. 4a Dimensioning of the embodiment of the clothing wire, cross-sectional view as in FIG. 3 .
• FIG. 4b a partial view of the clothing wire in cross section in the region of the projection,
• FIG. 5 a schematic representation of the arrangement of several juxtaposed windings of the clothing wire according to the embodiment of FIGS. 2 to 4 .
• FIG. 6 a schematic representation of several juxtaposed windings of a modified embodiment of a clothing wire,
• FIG. 7 Garnitur wire with two projections on the second Blattabschnittsseitenfläche in cross-sectional view,
• FIG. 8 Garniturdraht with two projections on the first and the second Blattabschnittsseitenfläche in cross-sectional view and
• FIG. 9 Dressing wire, each with a single-ended and a symmetrical projection on the second leaf portion side surface in cross-sectional view.

In FIG. 1 1 schematically shows a clothing roller 10 with an all-steel clothing 11 arranged thereon. The clothing roller 10 belongs to a carding machine not shown in detail. The carding machine may comprise a plurality of clothing rollers 10.

The carding machine serves to produce a batt of loose fibers. The fibers in the batt are parallelized or homogenized by the carding machine. For this purpose, the fibers are taken up by the all-steel clothing 11 on a clothing roller 10.

The all-steel clothing 11 consists of a wound in several windings 12 on the outer surface of the clothing roller 10 clothing wire 13. The clothing wire 13 is wound, so to speak helically under tension on the clothing roller 10, as shown schematically in FIG FIG. 1 is shown. The two loose ends of the clothing wire 13 are secured to the clothing roller 10, for example, by soldering, welding or other suitable releasable or non-releasable connection.

The shape of the clothing wire 13 is particularly in the FIGS. 2 to 4 clearly visible. The clothing wire 13 has a foot section 14 and a blade section 15. The foot portion 14 and the blade portion 15 are seamless and without joints made of a single material in one piece, for example, metal and in particular steel. The cross-sectional shape of the clothing wire 13 is generated in particular by a rolling process.

The clothing wire 13 extends in a wire longitudinal direction 1. At the foot portion 14, the clothing wire 13 has a base surface 16. With the base 16 of the clothing wire 13 is in its position of use on the lateral surface the clothing roller 10 on. The blade portion 15 extends approximately at right angles, relative to the base 16 of the foot portion 14 away, ie, it extends approximately in the height direction h, which is perpendicular to the base surface 16.

Adjacent to the base 16, the clothing wire 13 has at its foot portion 14 a first side surface 14a and a second side surface 14b. In the exemplary embodiment, a first leaf section side surface 15a, of the leaf section 15, adjoins the first side surface 14a of the foot section 14 in a stepless, offset and edgeless manner. The first side surface 14a and the first leaf portion side surface 15a extend in the embodiment in a first plane E ₁ perpendicular to the base 16, which, among other manufacturing advantages.

At the foot portion 14, on the side opposite to the first sheet portion side surface 15a, a second sheet portion side surface 15b of the sheet portion 15 adjoins. The second leaf section side surface 15b extends at least in a middle section 17 in a second plane E ₂ . The second plane E ₂ is inclined with respect to the first plane E ₁ and encloses with this an acute angle. In the middle section 17 of the leaf section 15, the width of the leaf section 15 thereby reduces in a direction away from the foot section 14.

The middle section 17 of the second leaf section side surface 15b is offset relative to the second side surface 14b of the foot section 14 transversely to the wire longitudinal direction 1, whereby a shoulder 18 is formed with a shoulder 19 in the transition region between the foot section 14 and the blade section 15. The shoulder 19 points away from the base 16 and can be parallel to the base 16 or slightly inclined relative to the base 16 to be aligned.

In the area of the free end of the blade section 15 remote from the foot section 14, there is a projection 24 following the middle section 17 on the second blade section side surface 15b, which projection is in FIG FIG. 4a is shown enlarged. The blade section 15 of the clothing wire 13 has only a single projection 24 in cross-section and in particular is free of depressions or additional profiles. The function of this projection 24 results schematically from the FIGS. 5 and 6 , If the clothing wire 13 is wound onto a garniture roller 10 to form an all-steel garnish 11, a garniture cup 25 is formed between two immediately adjacent windings 12 of the garniture wire 13. The garniture cup 25 is formed between the blade sections 15 of immediately adjacent windings 12. In this Garniturgasse 25, the fibers are added to produce the batt and parallelized. The projection 24 ensures that the fibers can be accommodated without damage in the Garniturgasse 25 and on the other hand in the Garniturgasse 25 are retained.

The blade portion 15 has two outer edges 26, which are formed by the abutment of each of a leaf portion side surface 15 a, 15 b to the tooth face 27. The outer edges 26 are jagged with respect to the base surface 16 and the foot section 14, respectively, so that teeth 28 are thereby formed on the blade section. The teeth 28 are in FIG. 2 illustrated. The outer edges 26 have a total sawtooth in the embodiment. Between two teeth 28 in the wire longitudinal direction l each have a gap 29 is present.

Each projection 28 has a projection 24 on the second sheet section side surface 15b. In the production of the clothing wire 13, a cross-sectional shape is initially produced with a projection 24 continuous in the wire longitudinal direction l. Subsequently, the outer edge 26 is brought into the desired shape, wherein the formation of the teeth 28, the spaces 29 are formed by punching or other separation process. As a result, a projection 24 is formed on each tooth 28 in each case, the projections 24 being arranged at a distance from each other due to the intermediate spaces 29 in the wire longitudinal direction l. Each jump 24 protrudes in the transverse direction q, which is perpendicular to both the wire longitudinal direction l and the height direction h, from the associated second sheet portion side surface 15b. The shape of the projections 24 on each tooth 28 is identical.

According to the invention, the projection 24 has an asymmetrical cross-sectional profile P. The projection 24 has a ridge 30. At the ridge 30, the protrusion 24 has the greatest distance from the second plane E ₂ , in which the central portion 17 of the second blade portion side surface 15 b extends. Starting from the ridge 30, the projection 24 has a first flank 31 and a second flank 32 which extend in opposite directions. The second flank 32 is arranged closer to the foot section 14 than the first flank 31.

The first flank 31 includes a first inclination angle α ₁ with the second plane E ₂ . Accordingly, the second flank 32 includes a second inclination angle α ₂ with the second plane E ₂ . The amount of the second inclination angle α ₂ is greater than the amount of the first inclination angle α ₁ . Viewed along the second plane E ₂ toward the foot section 14, the projection 34 rises along the first Flank 31 slowly up to the ridge 30 and falls steeply from the ridge 30 to the central portion 17 along the second flank 32.

In other words, the first length L _{1 of} the projection 24 measured along the second plane E ₂ along the first edge 31 to the ridge 30 is greater than the second length L _{2 of} the projection 24 along the second edge 32 from the middle portion 17 to the ridge 30. The two lengths L ₁ , L ₂ are measured along the first plane E ₁ , ie the lengths L ₁ , L ₂ and L _ges are defined as the projections on the plane E ₁ . Instead of the second plane E _2, another reference plane, for example, a reference plane that is perpendicular to the base surface 16 could be used for the length measurement or determination of the angle of inclination.

As a result, the cross-sectional profile P of the projection 24 has the shape of a nose which rises more slowly via the one, first flank 31 relative to a reference plane (for example second plane E ₂ ) than via the other, second flank 32.

The second length L _{2 of} the projection 24 along the second flank 32 is 15% to 25% of the total length L _tot (sum of the first length L ₁ and the second length L ₂ ) of the projection 24 along the first flank 31. The length L _ges is less than 1.5 mm. These dimensions relate to the length measurement along the first plane E ₁ (s. FIG. 4a ).

According to the in FIG. 4b shown dimension dimension (dimension) is the total length L _{ges of} the projection 24 25% to 35% of the total length L _{3 of} the blade portion 15. The maximum width B ₁ in the region of the projection 24, which is (approximately) at the level of the ridge 30, is 25% to 35% of the width B _{2 of} the foot portion 14. The total height of the clothing wire 13 is 4 to 5 mm (maximum 3.5 to 6 mm). The inclination angle β, which refers to the perpendicular to the base surface, the second plane E ₂ is about 8 °, the inclination angle ß of the plane standing on the base 16 first level E ₁ is corre sponding 0 °.

The end of the first flank 31 facing away from the ridge 30 coincides with the outer edge of the second leaf section side surface 15b, i. h., The first edge 31 terminates with the outer edge 26th

In FIG. 6 a modified embodiment of the clothing wire 13 according to the invention is illustrated. The blade section 15 is unchanged, so that reference can be made to the preceding example. Unlike the embodiments according to the FIGS. 1 to 5 the side surfaces 14a, 14b of the foot portion 14 are modified. The first side surface 14a has a depression 37 and the respectively other, second side surface 14b has a projection 38 which is adapted to the depression 37. The elevation 38 of a winding 12 can thus engage in the recess 37 of an immediately adjacent winding 12, as in FIG. 6 is illustrated schematically. In the previous embodiment, the two side surfaces 14a, 14b were aligned parallel to each other and at right angles to the base surface 16, so that the side surfaces 14a, 14b of immediately adjacent windings 12 lie flat against each other ( FIG. 5 ).

In the FIGS. 7 . 8th and 9 In each case Garnitur wires 13 are shown, the two asymmetrical projections 24 on the second leaf portion side surface 15b, two unbalanced Projections on both the first 15a and the second 15b Blattabschnittsseitenfläche, and each have an asymmetrical 24 and a symmetrical projection 39 on the second Blattabschnittsseitenfläche 15b. It should also be mentioned that even three, four or more projections - possibly on a leaf section side surface 15a, 15b - have advantages in relation to all embodiments of the invention.

LIST OF REFERENCE NUMBERS

10

clothed roller

11

Metallic wire

12

winding

13

clothing wire

14

foot section

14a

first side surface

14b

second side surfaces

15

blade section

15a

first leaf section side surface

15b

second leaf section side surface

16

Floor space

17

midsection

18

paragraph

19

shoulder surface

24

unbalanced projection

25

set Gasse

26

outer edge

27

Tooth face

28

tooth

29

gap

30

ridge

31

first flank

32

second flank

37

deepening

38

survey

39

symmetrical projection

α ₁

first inclination angle

α ₂

second inclination angle

β

tilt angle

l

Wire longitudinally

H

height direction

q

transversely

E ₁

first floor

E ₂

second level

L ₁

Length of the first flank

L ₂

Length of the second flank

L _ges

Total length of the projection

L ₃

Total length of the leaf section

B ₁

Maximum width in the range of at least one projection

B ₂

Width of the foot section

H

Height of the survey

P

Cross-sectional profile

Claims (14)

1. Carding wire (13) which runs in a wire longitudinal direction (1), for a carding roller (10) of a carding machine, with a foot portion (14) which has a base surface (16) for resting on the carding roller (10),
   with a flat blade portion (15) which protrudes away from the foot portion (14) in a height direction (h) running perpendicular to the base surface (16),
   wherein the blade portion (15), on the side facing away from the foot portion (14), has outer edges (26) which run in a zigzag to form teeth (28) on the blade portion (15), and the blade portion (15) has a first blade portion side face (15a) and a second blade portion side face (15b) which each run from the foot portion (14) up to the associated outer edge (26),
   wherein on at least one of the blade portion side faces (15a, 15b), at least one protrusion (24) is formed which protrudes in a transverse direction (q) running perpendicular to the height direction (h) and to the wire longitudinal direction (l), and which runs in the wire longitudinal direction (1), and which has an asymmetric cross-sectional profile (P),
   and wherein the cross-sectional profile (P) of the at least one protrusion (24) has a rounded spine (30) from which a first flank (31) and a second flank (32) run in different directions, wherein the second flank (32) is arranged closer to the foot portion (14) than the first flank (31), and the length (L₁) of the first flank (31) is greater than the length (L₂) of the second flank (32).
2. Carding wire according to claim 1, characterised in that the length (L₂) of the second flank (32) amounts to 10% to 30% of the total length (L_ges) of the protrusion (24).
3. Carding wire according to claim 1 or 2, characterised in that the length (L₂) of the second flank (32) amounts to 15% to 25% of the total length (L_ges) of the protrusion (24).
4. Carding wire according to any of claims 1 to 3, characterised in that the width (B₁) of the carding wire (13) in the transverse direction (q), at the site of the protrusion (24) at which the carding wire (13) has a maximum width, amounts to 20% to 50% of the width (B₂) of the foot portion (14) of the carding wire (13).
5. Carding wire according to claim 4, characterised in that the maximum width (B₁) of the carding wire in the region of the protrusion amounts to 25% to 35% of the width (B₂) of the foot portion (14) of the carding wire (13).
6. Carding wire according to any of claims 1 to 5, characterised in that the total length (L_ges) of the protrusion (24) amounts to 20% to 40% of the total length (L₃) of the blade portion (15) in the height direction (h).
7. Carding wire according to claim 6, characterised in that the total length (L_ges) of the protrusion (24) amounts to 25% to 35% of the total length (L₃) of the blade portion (15) in the height direction (h).
8. Carding wire according to any of claims 1 to 7, characterised in that the protrusion (24) is formed without a shoulder or edge.
9. Carding wire according to any of claims 1 to 8, characterised in that at least one protrusion (24), preferably precisely one protrusion (24), is arranged exclusively on the second blade portion side face (15b).
10. Carding wire according to any of claims 1 to 8, characterised in that precisely one protrusion (24) is arranged on at least one of the blade portion side faces (15a, 15b).
11. Carding wire according to any of claims 1 to 10, characterised in that the first blade portion side face (15a) in the regions in which there is no protrusion (24) runs in a plane (E₁), and/or the second blade portion side face (15b) in the regions in which there is no protrusion (24) runs in a plane (E₂).
12. Carding wire according to claim 11, characterised in that both the first flank (31) and the second flank (32) of the at least one protrusion (24) have rectilinear regions,
    wherein the amount of the angle (α₁) enclosed by the tangents of the rectilinear region of the first flank (31) with the plane (E₁, E₂) adjacent to the at least one protrusion (24), is smaller than the amount of the angle (α₂) enclosed by the tangents of the rectilinear region of the second flank (32) with the plane (E₁, E₂) adjoining the at least one protrusion (24).
13. Carding wire according to any of claims 1 to 12, characterised in that the plane (E₁) of the first blade portion side face (15a) is oriented at right angles to the base surface (16) of the foot portion (14), and the plane (E₂) of the second blade portion side face (15b) is inclined relative to the first blade portion side face (15a).
14. Carding wire according to any of claims 1 to 12, characterised in that the plane (E₁) of the first blade portion side face (15a) and the plane (E₂) of the second blade portion side face (15b) are inclined towards each other, wherein the amount of the angle enclosed by the plane (E₁) with the base surface (16) of the foot portion (14), and the amount of the angle enclosed by the plane (E₂) with the base surface (16), are the same.

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