EP1860233B1 - Wire section of a machine for producing and/or treating a sheet of fibrous material - Google Patents

Description

The invention relates to a wire section of a machine for producing and / or treating a fibrous web, in particular paper or board web comprising at least one roller, in particular Formierwalze or Siebsaugwalze, and at least one guided over a partial circumferential region of the roller, said roller having a roll shell Having a plurality of radial openings and wherein the roll shell is wrapped with a composite of upright in the radius direction of the roll shell of the roll upright bands support structure.

Such a wire section is for example from the German patent application DE 32 10 320 A1 known. The support structure is formed of straight, at least approximately in the circumferential direction of the roll shell of the roller and upstanding in the radius direction of the roll shell of the roll standing first bands formed by in the circumferential direction of the roll shell of the roll corrugated and also in the radius direction of the roll shell of the roll upright second bands connected to each other. Thus, a support structure in the form of a honeycomb structure with a plurality of honeycombs. In this case, this honeycomb structure forms a honeycomb honeycomb cover in such a way that cable connections exist between the honeycombs belonging to a honeycomb group, the boundaries between adjacent honeycomb groups being free from such honeycomb connections. In this case, a significant reduction in the noise generated during operation of the wire section is achieved in a favorable manner.

However, the disclosed wire section has the serious disadvantage that it can not be operated for most types of graphic paper, since otherwise clear marks in the fibrous web are visible. Furthermore, it has a higher than average wear both on the honeycomb structure and on the guided sieve.

In order to avoid these disadvantages of the disclosed wire section as far as possible, the roller was provided in the past with a Schrumpfsiebbezug. In addition, the Schrumpfsiebbezug favoring the equalization of water outflow from the fibrous web in the roller of the wire section with additional avoidance of hole shadow marks in the fibrous web.

Such a roller for a wire section is, for example, in the German Offenlegungsschrift DE-OS 21 48 361 described.

Despite a variety of benefits, the use of a shrink screen cover on a roll also presents a number of disadvantages. These disadvantages include, for example, frequent roll changes required as a result of shrink screen wear (typically every three at nine months), unplanned shutdowns due to shrinkage screen damage, and restrictions on the use of certain detergents. For example, alkalis damage the polyester material of the shrink-wrap cover. Moreover, in most cases a high pressure spray tube is needed. Since the roller is provided with a stocking, the use of a scraper is not possible.

In the recent past, rollers have been described, for example in the international application WO 99/32713 A1 or in the German Offenlegungsschrift DE 100 26 542 A1 on which a regular basic drill pattern is applied. This basic drilling pattern, also referred to as a first group or primary pattern, usually consists of holes drilled through the roll shell, which are countersunk on the outside of the roll are. If necessary, the primary pattern can also be overlaid by other patterns, such as a secondary pattern.

However, the serious drawback of using such a roller having at least one pattern is that increased wear occurs on both the roller and the screen due to reduction of the wings. This wear is reinforced in particular by sharp edges on the circumference of the wings or by raised nubs in the wings. Although attempts have been made to eliminate existing burrs and the like by conventional brushing, the problem of increased screen wear could not be satisfactorily resolved.

In the document EP1647629 A1 a roller is described which provides a plurality of drainage openings. Between these, a plurality of supporting bodies are arranged, which at least temporarily carry a wire and which each have a sieve contacting bearing surface, as well as a surrounding the support surface and executed to the roll axis carrying flank. At least the wings are coated.

It is therefore a first object of the invention to develop a wire section of the type mentioned in such a way that an extended range of paper types can be produced at increased machine speeds and reduced wear on all agents involved.

Furthermore, it is a second object of the invention to provide a method for producing a roller for the wire section according to the invention. The first object is achieved according to the invention in that the strips are provided with a thermal spray coating at least in their outermost radial region in which they at least intermittently contact the screen, the radii facing the screen 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm, and that the thermal spray coating has a coating thickness in the range of 0.5 to 2 mm, preferably from 0.75 to 1.5 mm.

The first object according to the invention is completely solved in this way.

According to the invention, the thermal spray coating has a coating thickness in the range of 0.5 to 2 mm, preferably 0.75 to 1.5 mm. This thickness range is cost-effective and reliable to produce and meets the requirements in practice more than necessary.

The provision of the roller at least in its outermost radial region with a thermal spray coating provides a significant reduction in wear on all the agents involved, such as the roller itself and the sieve passed over them. In addition, the attachment of said radii on the sieve facing outermost radial region of the roller continues to affect the reduction of wear, since on the one hand, the possible wear surfaces are formed on the roller cheaper and on the other hand, the sieve no longer over sharp, the wear-promoting surfaces the roller is guided. Furthermore, the invention has an extremely positive effect, especially at high wire tensions, for example ≥ 5 kN / m, preferably ≥ 6 kN / m, in particular ≥ 8 kN / m, since here the contact pressure of the wire on the belts of the roller is particularly high, thus theoretically also the Siebverschleiß increases.

The inventive design of the wire section, in particular the roller, creates the best conditions for the production of both non-sensitive paper types and sensitive paper types while avoiding markings in the fibrous web. In general, higher machine speeds can also be achieved and improved runnability is achieved, among other things due to fewer roll changes and reduced downtimes over time.

In two preferred practical embodiments it is provided that the roll shell of the roll is provided with straight, at least approximately in the circumferential direction of the roll shell of the roll extending and upright in the radius direction of the roll shell of the roll first bands, which is corrugated by in the circumferential direction of the roll shell of the roll and also in the radius direction of the roll shell of the roll upright second belts are connected to each other, or that the roll shell of the roll is provided with shaped, at least approximately in the circumferential direction of the roll shell of the roll extending and upstanding in the radius direction of the roll shell of the roll first bands. In both embodiments, the support structure thus consists of a honeycomb structure with a plurality of honeycombs. The first embodiment is for example from the already mentioned German Offenlegungsschrift DE 32 10 320 A1 known, whereas the second Embodiment, for example, from the European patent application EP 0 462 434 A1 is known.

Experiments have shown that only thermal spraying is suitable for producing the roll with its radii. Other methods, such as the vacuum method, namely CVD (Chemical Vapor Deposition) or PVD (Physical Vapor Deposition) for applying coating material, such as TiN, TiBN, TiAlN, CrN, CrBN or NbN, are not suitable for said production, since their use no Kantenverrundungen be expected with the above radii.

The thermal spray coating preferably consists of a coating material applied by thermal spraying, which comprises at least oxide-ceramic materials, carbide-based materials or self-fluxing alloys. When using this coating material, a coating hardness of the thermal spray coating in the range of 3,000 to 15,000 N / mm ² , preferably from 5,000 to 10,000 N / mm ² , can be produced.

The oxide-ceramic materials may preferably be Cr ₂ O ₃ , TiO ₃ , Al ₂ O ₃ or mixtures thereof, the carbide-based materials WC / Co, WC / Co / Cr, or Cr ₃ C ₂ / NiCr and the self-fluxing alloys NiCrBSi. Their use excellently favors the generation of edge fillets with the above radii.

In further preferred embodiments, in the circumferential direction and / or in the axial direction of the roll mantle of the roll, adjacent honeycombs are connected to one another by way of at least one opening, wherein the respective one Opening is arranged in the outermost radial region. In this case, the opening is preferably open towards the outer radial area, whereby a recess is formed in the band. This embodiment is particularly suitable for label-sensitive paper grades, since thus no regular marking structure in the fibrous web is visible. However, the structure must be designed so that, despite broken strips still enough guide surface for the sieve is available, so that the sieve is still safely performed without excessive wear. For this purpose, the individual honeycomb can be designed so that as possible no continuous guide surface between two adjacent honeycomb remains. It makes sense that the recesses are designed and arranged so that adjacent honeycombs have partially deviating arrangements and dimensions of these recesses. In particular, the visual impression of a regularity of the openings should be avoided.

With regard to an efficient avoidance of tube formation and an increase in the service life of the screen, adjacent second bands without adjacent recess have a spacing ≦ 40 mm, preferably ≦ 30 mm, in the circumferential direction of the roll mantle of the roll.

The arranged on the roll shell strips are preferably made of steel, preferably a stainless steel, made of aluminum, an alloy, in particular brass, or a plastic, in particular a CFK or GFRP. These materials provide the advantage of a substantial insensitivity to other, used in the wire section and accumulating materials with sufficient mechanical strength for the conventional operation of the wire section.

In order for a good and evenly balanced leadership of the screen is given, adjacent honeycomb in the circumferential direction of the roll shell of the roll are preferably offset from one another in the axial direction of the roll shell of the roll.

The second object is achieved according to the invention in that the strips mounted on the roll shell having a plurality of radial openings are provided with a thermal spray coating by thermal spraying at least in their outermost radial region in which they at least temporarily come into contact with the sieve. the radii facing the sieve ≥ 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm, and that the thermal spray coating has a coating thickness in the range of 0.5 to 2 mm, preferably from 0.75 to 1 , 5 mm.

The second object according to the invention is completely solved in this way, resulting in the aforementioned advantages of the invention.

In a preferred embodiment, a high-speed flame spraying or an atmospheric plasma method is used for thermal spraying, since both coating methods best meet the requirements placed on them. Of course, other other coating methods can find their use, wherein the coating method used is largely determined by the coating material used.

Furthermore, a coating material is preferably used for thermal spraying, which comprises at least oxide-ceramic materials, carbide-based materials or self-fluxing alloys. Their use excellently favors the generation of edge fillets with the above radii.

The strips are ideally at least post-treated prior to thermal spraying, in particular by breaking and / or deburring sharp edges and / or brushing and / or sandblasting. This provides optimum preparation due to the removal of sharp edges, burrs and the like for the subsequent coating of the at least outermost radial regions of the roll.

Also, the bands can be provided with the corresponding recesses, for example by means of a laser before the production of the support structure.

In order to achieve a better adhesion of the later applied coating, it is advantageous in the first embodiment if the strips are treated by brushing, in particular by brushing with nylon brushes containing abrasives, such that they are at least in their outermost radial area in which they are at least temporarily come into contact with the screen, a radius ≥ 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm, obtained.

In a second embodiment, it may be advantageous if the strips are provided with a coating prior to their attachment to the roll shell of the roll in such a way that they have a radius ≥ at least in their outermost radial region in which they at least intermittently contact the wire 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm.

The roller of the wire section according to the invention of a machine for the production and / or treatment of a fibrous web, in particular paper or board web, is also outstandingly suitable for use in a conversion of a wire section. In this case, the Siebschrumpfbezug a previously used roller can be removed and the emerging bands are formed according to the invention. The recesses in the bands can be introduced, for example by means of a laser or by grinding in the support structure. Furthermore, the support structure can be provided with a thermal spray coating at least in its outermost radial region, in which they at least temporarily contact the screen, the radii facing the screen ≥ 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm. As a result, in particular the costs for the rebuilt wire section and the time required for the production of the components for the rebuilt wire section can be significantly reduced.

In addition, components and assemblies, which interacted with the roller before the conversion of the wire section, can be reused without major problems.

Further features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings.

Figur 1:

eine ausschnittsweise Abwicklung der Tragflächen einer ersten Ausführungsform einer Walze einer Siebpartie;

Figur 2:

eine Schnittdarstellung der Walze gemäß der Schnittlinie A-A der Figur 1;

Figur 3:

eine ausschnittsweise Abwicklung der Tragflächen einer zweiten Ausführungsform einer Walze einer Siebpartie;

Figur 4:

eine Schnittdarstellung der Walze gemäß der Schnittlinie B-B der Figur 3; und

Figur 5:

eine beispielhafte Anwendung der Walze in einer erfindungsgemäßen Siebpartie einer Maschine zur Herstellung einer Faserstoffbahn.

Show it

FIG. 1:

a partial development of the wings of a first embodiment of a roller of a wire section;

FIG. 2:

a sectional view of the roller according to the section line AA of FIG. 1 ;

FIG. 3:

a partial development of the wings of a second embodiment of a roller of a wire section;

FIG. 4:

a sectional view of the roller according to the section line BB of FIG. 3 ; and

FIG. 5:

an exemplary application of the roller in a wire section of a machine according to the invention for producing a fibrous web.

The FIG. 1 shows a fragmentary development of the wings of a first embodiment of a roller shell 3 having a roller 2 of a non-illustrated, the expert but well-known wire section. 1

The roll 2 is, for example, a forming roll or wire suction roll of a machine for producing a fibrous web and serves for the production and / or treatment of the fibrous web, such as a paper or board web. The wire section 1 further comprises at least one screen 4, not shown, which is guided over a partial circumferential area of the roller 2. The sieve 4 can be a fine and multi-layer plastic sieve, for example of the SSB type with a sieve thickness ≦ 0.6 mm. The titer (Yarn count, yarn size) of a screen thread can have a value in the range of 50 to 120 dtex, preferably from 60 to 90 dtex.

The roll shell 3 of the roll 2 has a multiplicity of radial openings 5 and is enveloped by a support structure 6 composed of ribbons 7 standing upright in the direction of the radius Z (arrow) of the roll shell 3 of the roll 2.

In the execution of FIG. 1 is the roll shell 3 of the roll 2 with straight, at least approximately in the circumferential direction Y (arrow) of the roll shell 3 of the roller 2 and extending in the direction of the radius Z (arrow) of the roll shell 3 of the roll 2 upright first bands 7.1 provided. The radial openings 5 are shown for clarity only in a selection.

The first bands 7.1 are connected to one another by circumferential corrugations Y (arrow) of the roll shell 3 of the roll 2 and also in the direction of the radius Z (arrow) of the roll shell 3 of the roll 2 upright second strips 7.2 connected to each other, so that as support structure 6, a honeycomb structure 8 with a variety of honeycomb 9 arises. The corrugation of the second bands 7.2 may, for example, have an illustrated trapezoidal basic shape. Furthermore, the compounds of the two bands 7.1, 7.2 executed by known point and / or seam welds.

Alternatively, but not explicitly shown, the roll shell 3 of the roll 2 can also be provided with shaped first ribbons running at least approximately in the circumferential direction Y (arrow) of the roll shell 3 of the roll 2 and upstanding in the radius direction Z of the roll shell 3 of the roll 2, so that the support structure again consists of a honeycomb structure with a multiplicity of honeycombs due to the formation of the first bands, at least on the upper side. This type of support structure is, as already stated, for example, from the European patent application EP 0 462 434 A1 known.

The FIG. 2 shows a sectional view of the roller 2 according to the section line AA of FIG. 1 ,

The arranged and cut on the roll shell 3 second belt 7.2 is at least in its outermost radial region 10, in which it at least temporarily comes into contact with the illustrated sieve 4, provided with a thermal spray coating 11, the sieve 4 facing radii R ≥ 0th , 05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm. The cut second band 7.2 is given by way of example for the other bands 7.1, 7.2, all of which have the respective radius R ≥ 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm, made of steel, preferably not one consist of an alloy, in particular brass, or a plastic, in particular a CFK or GRP, and a sheet thickness B ≤ 2 mm, preferably ≤ 1.5 mm, in particular ≤ 1.0 mm, have.

The thermal spray coating 11 consists of a coating material 12 which comprises at least oxide-ceramic materials, carbide-based materials or self-fluxing alloys. The oxide-ceramic materials may preferably be Cr ₂ O ₃ , TiO ₃ , Al ₂ O ₃ or mixtures thereof, the carbide-based materials WC / Co, WC / Co / Cr, or Cr ₃ C ₂ / NiCr and the self-fluxing alloys NiCrBSi.

Furthermore, the thermal spray coating 11 has a coating thickness D in the range of 0.5 to 2 mm, preferably 0.75 to 1.5 mm, and a coating hardness HU 1.0 in the range of 3,000 to 15,000 N / mm ² , preferably from 5,000 to 10,000 N / mm ² , up.

The thermal spray coating 11 may in principle be smaller, equal or, as in the FIG. 2 shown to be greater than the cross section of the second band 7.2. Depending on the design, this results in a shelter, a tie or a supernatant Ü shown.

The FIG. 3 shows a partial development of the wings of a second embodiment of a roller shell 3 having roller 2 of a non-illustrated, the expert but known wire section 1. The wire section 1 comprises in a known manner at least one screen 4, not shown, which is guided over a partial circumferential area of the roller 2 is.

Since the roller 2 similar to that in the FIG. 1 Roller 2 is constructed, will refer to their description at this point.

Unlike the one in the FIG. 1 Roller 2 shown are all connected in the circumferential direction Y (arrow) of the roll shell 3 of the roll 2 adjacent honeycomb 9 of the present roller 2 via at least one opening 13, wherein the respective opening 13 is disposed in the second band 7.2 in the outermost radial region 10. By way of example only, some openings 13 are shown.

Furthermore, in the present embodiment, in the axial direction X (arrow) of the roll shell 3 of the roll 2, adjacent honeycombs 9 are connected to one another via at least one opening 14, wherein the respective opening 14 in the first belt 7.1 is again arranged in the outermost radial region 10. Some openings 14 are in turn only shown in a selection.

The FIG. 4 shows a sectional view of the roller 2 according to the section line BB of FIG. 3 ,

The opening 13 is opened directed towards the outer radial region 10, whereby a recess 15 is formed in the second band 7.2. Furthermore, in the circumferential direction Y (arrow) of the roll mantle 3 of the roll 2, adjacent second tapes 7.2 without an adjacent recess have a spacing L ≦ 40 mm, preferably ≦ 30 mm (cf. FIG. 3 ).

It is obvious to the person skilled in the art that the opening 14 mounted in the first band 7.1 can also be provided with a recess, as shown in FIG FIG. 4 is shown as a recess 15 for the attached in the second band 7.2 opening 13. The recess 15 may in principle have any polygonal contour, such as a semicircle shown, a circle segment, a triangle, a quadrangle or the like.

The arranged on the roll shell 3 and cut second band 7.2 is again at least in its outermost radial region 10, in which it at least temporarily comes into contact with the illustrated sieve 4, provided with a thermal spray coating 11, the sieve 4 facing radii R ≥ 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm. Of course, the same applies to the arranged on the roll shell 3 first band 7.1.

The in the FIGS. 1 to 4 illustrated embodiments of the roller 2 can of course be combined with each other, so that ultimately a roller 2 can arise with all possible performance characteristics.

Thus, in the axial direction X (arrow) of the roll shell 3 of the roll 2 adjacent honeycomb 9 in the circumferential direction Y (arrow) of the roll shell 3 of the roll 2 can be arranged offset from each other, as in the FIGS. 1 and 3 is merely indicated.

The in the FIGS. 1 to 4 illustrated embodiments of the roller 2 can be prepared using the method according to the invention.

Thus, on the plurality of radial openings 5 having roll shell 3 attached bands 7.1, 7.2 at least in its outermost radial region 10, in which they at least temporarily contact the screen 4, provided by thermal spraying with a thermal spray coating 11 the radii R ≥ 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm, facing the sieve 4.

For thermal spraying, high-speed flame spraying or an atmospheric plasma process and a coating material which comprises at least oxide-ceramic materials, carbide-based materials or self-fluxing alloys are used here.

The bands 7.1, 7.2 are at least aftertreated before the thermal spraying, in particular by breaking and / or deburring sharp edges and / or brushing and / or sandblasting. During brushing, in particular when brushing with nylon brushes containing abrasives, the belts 7.1, 7.2 are aftertreated in such a way that they have a radius R ≥ 0.05, at least in their outermost radial region 10, in which they contact the screen 4 at least temporarily mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm.

Alternatively or additionally, the bands 7.1, 7.2 before their attachment to the roll shell 3 of the roll 2 are provided with a coating such that they at least in its outermost radial region 10, in which they contact at least temporarily with the wire 4, a radius R ≥ 0.05 mm, preferably ≥ 0.1 mm, especially ≥ 0.3 mm.

The FIG. 5 shows an exemplary application of the roller 2 in a wire section 1 according to the invention of a machine for producing a fibrous web.

Such a wire section 1 is for example from the German patent application DE 101 06 731 A1 known. It has at least one essentially vertical twin-wire section S, in whose initial region SA a forming roller 16 and / or in the deflection region SU and / or end region SE a screen suction roller 17 is arranged. At least one of the two rollers 16, 17 is designed as a roller 2 described above.

Of course, the twin-wire section S of the wire section 1 can also extend obliquely upwards or downwards at an angle to the horizontal, or it can also run horizontally or approximately horizontally. The FIG. 5 So represents only an exemplary course of Doppelsiebstrecke S.

The roll 2 of the wire section 1 according to the invention of a machine for producing and / or treating a fibrous web, in particular paper or board web, is, as already stated, also excellent for use in a conversion of a wire section.

In summary, it should be noted that an improved wire section of the type mentioned above is provided by the invention, by means of which an extended range of paper types can be produced at increased machine speeds and reduced wear on all agents involved.

LIST OF REFERENCE NUMBERS

1

Wire section

2

roller

3

roll shell

4

scree

5

opening

6

support structure

7.1

First volume

7.2

Second volume

8th

honeycomb structure

9

honeycomb

10

Extremely radial area

11

Thermal spray coating

12

coating material

13

opening

14

opening

15

recess

16

forming roll

17

Suction roll

A

distance

A-A

intersection

B

sheet thickness

B-B

intersection

D

coating thickness

HU 1.0

coating hardness

R

radius

S

twin-wire

S.A.

initial region

S. E

end

S.U

deflection

Ü

Got over

X

Axial direction (arrow)

Y

Circumferential direction (arrow)

Z

Radius direction (arrow)

Claims (17)

1. Wire section (1) of a machine for producing and/or treating a fibrous web, in particular a paper or board web, which comprises at least one roll (2), in particular a forming roll or wire suction roll, and at least one wire (4) guided over a partial circumferential region of the roll (2), the roll (2) having a roll shell (3) with a multiplicity of radial openings (5), and the roll shell (3) being encased in a supporting structure (6) assembled from strips (7, 7.1, 7.2) standing on edge in the radial direction (Z) of the roll shell (3) of the roll (2),
   characterized in that
   the strips (7, 7.1, 7.2), at least in their outermost radial region (10), in which they come at least temporarily into contact with the wire (4), are provided with a thermal sprayed coating (11) which has radii (R) ≥ 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm, facing the wire (4), and in that the thermal sprayed coating (11) has a coating thickness (D) in the range from 0.5 to 2 mm, preferably from 0.75 to 1.5 mm.
2. Wire section (1) according to Claim 1,
   characterized in that
   the roll shell (3) of the roll (2) is provided with straight first strips (7.1) extending at least approximately in the circumferential direction (Y) of the roll shell (3) of the roll (2) and standing on edge in the radial direction (Z) of the roll shell (3) of the roll (2), which are connected to one another by second strips (7.2) which are corrugated in the circumferential direction (Y) of the roll shell (3) of the roll (2) and likewise stand on edge in the radial direction (Z) of the roll shell (3) of the roll (2), so that the supporting structure (6) consists of a honeycomb structure (8) having a multiplicity of honeycombs (9).
3. Wire section (1) according to Claim 1,
   characterized in that
   the roll shell (3) of the roll (2) is provided with shaped first strips (7.1) extending at least approximately in the circumferential direction (Y) of the roll shell (3) of the roll (2) and standing on edge in the radial direction (Z) of the roll shell (3), so that the supporting structure (6) consists, at least on the top side, of a honeycomb structure (8) having a multiplicity of honeycombs (9).
4. Wire section (1) according to Claim 1, 2 or 3,
   characterized in that
   the thermal sprayed coating (11) consists of a coating material (12) which comprises at least ceramic oxide materials, carbide-based materials or free-flowing alloys.
5. Wire section (1) according to one of the preceding claims,
   characterized in that
   the thermal sprayed coating (11) has a coating hardness (HU 1.0) in the range from 3000 to 15,000 N/mm², preferably from 5000 to 10,000 N/mm².
6. Wire section (1) according to one of Claims 2 to 5,
   characterized in that
   in the circumferential direction (Y) of the roll shell (3) of the roll (2), adjacent honeycombs (9) are connected to one another via at least one opening (13, 15), the respective opening (13, 15) being arranged in the outermost radial region (10).
7. Wire section (1) according to one of Claims 2 to 6,
   characterized in that
   in the axial direction (X) of the roll shell (3) of the roll (2), the majority of adjacent honeycombs (9) are connected to one another via at least one opening (14, 15), the respective opening (14, 15) being arranged in the outermost radial region (10).
8. Wire section (1) according to Claim 6 or 7,
   characterized in that
   the opening (13, 14) is open in a direction towards the outer radial region (19), which produces a cut-out (15) in the strip (7.1, 7.2).
9. Wire section (1) according to Claim 8,
   characterized in that
   in the circumferential direction (Y) of the roll shell (3) of the roll (2), adjacent second strips (7.2) without an adjacent cut-out have a spacing (L) of ≤ 40 mm, preferably ≤ 30 mm.
10. Wire section (1) according to one of the preceding claims,
    characterized in that
    the strips (7, 7.1, 7.2) consist of steel, preferably non-rusting steel, of aluminium, of an alloy, in particular brass, or of plastic, in particular a CRP or GRP.
11. Wire section (1) according to one of Claims 2 to 10,
    characterized in that
    in the axial direction (X) of the roll shell (3) of the roll (2), adjacent honeycombs (9) are arranged offset from one another in the circumferential direction (Y) of the roll shell (3) of the roll (2).
12. Method for producing a roll (2), in particular a forming roll or wire suction roll, for use in a wire section (1) according to Claim 1, the roll (2) having a roll shell (3) with a multiplicity of radial openings (5), and the roll shell (3) being encased in a supporting structure (6) assembled from strips (7, 7.1, 7.2) standing on edge in the radial direction (Z) of the roll shell (3) of the roll (2),
    characterized in that
    the strips (7, 7.1, 7.2) fitted to the roll shell (3) having a multiplicity of radial openings (5), at least in their outermost radial region (10), in which they come at least temporarily into contact with the wire (4), are provided by thermal spraying with a thermal sprayed coating (11) which has radii (R) ≥ 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm, facing the wire (4), and in that the thermal sprayed coating (11) has a coating thickness (D) in the range from 0.5 to 2 mm, preferably from 0.75 to 1.5 mm.
13. Method according to Claim 12,
    characterized in that
    high-speed flame spraying or an atmospheric plasma process is used for the thermal spraying.
14. Method according to Claim 12 or 13,
    characterized in that
    a coating material (12) which comprises at least ceramic oxide materials, carbide-based materials or free-flowing alloys is used for the thermal spraying.
15. Method according to Claim 12, 13 or 14,
    characterized in that
    before the thermal spraying, the strips (7, 7.1, 7.2) are at least re-treated, in particular by bevelling and/or de-burring sharp edges and/or brushing and/or sandblasting.
16. Method according to Claim 15,
    characterized in that
    the strips (7, 7.1, 7.2) are re-treated by brushing, in particular by brushing with nylon brushes containing abrasive material, in such a way that, at least in their outermost radial region (10), in which they come at least temporarily into contact with the wire (4), they are given a radius (R) ≥ 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm.
17. Method according to Claim 12, 13 or 14,
    characterized in that
    before their fitting to the roll shell (3) of the roll (2), the strips (7, 7.1, 7.2) are provided with a coating in such a way that, at least in their outermost radial region (10), in which they come at least temporarily into contact with the wire (4), they are given a radius (R) ≥ 0.05 mm, preferably ≥ 0.1 mm, in particular ≥ 0.3 mm.

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