DE102005000011A1 - Headbox for a machine for producing a fibrous web and method for producing a fibrous web - Google Patents

Abstract

The invention relates to a headbox (1) for a machine for producing a fibrous web with at least one distributor (2) for distributing a pulp suspension (3) in partial streams (T¶1¶ to T¶N¶) across the machine width (M), in the machine direction (L) a turbulence generator (4) having a plurality of rows (Z¶1¶ to Z¶4¶; Z¶1¶ to Z¶6¶) and columns (S¶1¶ to S¶11¶) arranged Turbulence channels (5, 5.1) and a headbox nozzle (6) is connected downstream, which is provided with a pulp suspension jet (8) supplying exit slit (7), in addition, on both sides of each edge arranged and on the respective marginal column (S¶1¶, S¶11¶) to turbulence channels (5.1) acting means (9.1, 9.2) at least for influencing, preferably for controlling the fiber orientation and / or the basis weight, is provided. The headbox (1) according to the invention is characterized in that the respective marginal device (9.1, 9.2) comprises at least one preferably controllable delivery system (10) for at least one fluid (11), which contains at least one fluid (11) preferably exclusively one feeds edge turbulence channel (5.1).

Description

Such a headbox is for example from the European patents EP 0 353 255 B1 . EP 0 857 816 B1 and EP 0 595 325 B1 known.

In the execution of EP 0 353 255 B1 the outlet gap chamber means is an injector for injecting a secondary flow into a primary flow at an angle relative to the flow direction of the primary flow such that the secondary flow flows laterally in the chamber into the primary flow, thereby longitudinally orienting the fibers within the primary flow to control the lateral margins of the substance.

On the other hand is in the execution of EP 0 857 816 B1 the device includes an edge feed assembly as an integral part of a known dilution profiling system. The edge feed assemblies disposed on either side of a turbulizer have channels through which it is possible for edge streams to pass from the inlet header of the dilution profiling system to both sides of the headbox, the edge flows having velocities and / or velocity ratios that can be adjusted and / or regulated. and wherein a controlled transverse velocity component is generated in the pulp suspension jet by the edge flows so as to control the fiber alignment profile in the transverse direction. The edge feed liquid introduced by the edge feed arrangements is preferably white water.

The both mentioned embodiments enable altogether a so-called edge control. However, they are liable serious disadvantage that they each only have an influence the beam direction over the entire height allow the headbox nozzle. In addition, when using fins no influence on the beam direction possible per line, which in turn is possible Diagonal curl due to different tensions in the outer layers can not be counteracted.

The execution of EP 0 595 325 B1 comprises a one-piece block means for regulating the flow rate through a set of vertically aligned tubes of a turbulizer. The block comprises a number of through holes which correspond in diameter and center distance to the inner diameter and center distance of the vertically aligned tubes and are arranged in alignment with the passageways of the vertically aligned tubes. By turning a specially arranged in the block shaft (spindle), the volume flow through the set of vertically aligned tubes can be adjusted or regulated simultaneously.

Also this mentioned execution in turn has the disadvantage that they again an influence the beam direction only over the entire height the headbox nozzle allows. When using fins, in turn, no influence on the Beam direction per line possible, so that a possible Diagonal curl also can not be counteracted.

All in all So it is in the known versions no ideal fiber deposition across the machine direction per line of the turbulence generator possible. This is especially in fine and Copy papers critical, for example, in terms of their stackability and the same. The emergence of the diagonal curl is thus favored yes even encouraged.

Task of invention

Of the Invention is based on the object, an improved headbox velvet method of the type mentioned above, in addition to the mentioned prior disadvantages of the prior art in particular the emergence of the diagonal curl, especially in duplex copy papers avoided becomes. In addition, the headbox in the structure should also possible be kept simple.

These Task is in a headbox according to the invention thereby solved, that the respective edge-side device at least one preferably controllable feed for at least a fluid which preferably contains the at least one fluid exclusively a peripheral turbulence channel supplies.

The inventive task is completely solved in this way.

Due to the inventive design of the headbox, the possibility of an edge control is created for at least one, preferably for each row of the turbulence generator. The jet direction of the pulp suspension jet emerging from the line of the turbulence generator or from the exit slit of the headbox nozzle can therefore be influenced in a targeted manner. Thus, the generation of an exact fiber deposit in the machine direction per row of the turbulence generator is made possible. As a result, among other things, the emergence of the diagonal curl can be largely avoided. Moreover, the headbox according to the invention in the production of each find known paper or cardboard sort its use. It can also be designed as a multi-layer headbox known to the person skilled in the art, as described, for example, in German Offenlegungsschrift DE 44 35 860 A1 is known.

In preferred embodiment is provided that the respective peripheral device at least two preferably adjustable feed systems for each comprises at least one fluid, which the respective at least one Supply fluid at least the lowest and highest edge turbulence channel. hereby is achieved that at least the critical in particular for the diagonal curl outer layers the produced fibrous web targeted because of their sensitivity can be influenced for example, by influencing the respective fiber orientation.

Generally For example, the respective marginal device can have several, preferably adjustable feed systems for each comprise at least one fluid which the respective at least one Fluid preferably exclusively each lead to a peripheral turbulence channel. In possibly more elaborate execution is for each edge-side turbulence channel a preferably controllable feed system for at least provided a fluid. This creates the possibility of the most accurate generation an exact layered fiber deposit due to the best possible influence the beam direction.

in the In view of a cost-effective Solution can also be provided that the respective peripheral device comprises at least one preferably controllable delivery system for at least one fluid, which supplies the at least one fluid at least two edge-side turbulence channels. The Application of this design is particularly suitable in the presence of symmetrical properties.

The preferably adjustable feed system comprises preferably at least one supply line, which is provided with a preferably adjustable actuator. The actuator may, for example, an adjustable throttle, in particular a control valve, his.

Further the at least one fluid is preferably the high-consistency pulp suspension supplied to the headbox, a low-consistency fluid, in particular white water, or a Mixed fluid, which is a preferably adjustable, in particular controllable Has mixed consistency. Should it be the fluid to the the Headbox fed act highly consistent pulp suspension, it is preferably adjustable feeding system preferably directly with the distribution device for distributing the Pulp suspension in partial streams over the Machine width connected. Is, however, the supply of the a preferably adjustable, in particular controllable mixed consistency provided mixing fluid provided, it is preferably at least one Fluid supplied to the headbox high-consistency pulp suspension and another fluid is a low-consistency Fluid, in particular white water. Overall, the marginal turbulence channels supplied fluids have neither the same textures nor the same consistencies.

In order to in the flow space the headbox nozzle a layered flow it is preferred by at least one with the turbulence generator subdivided by means of at least one blade holder connected lamella. The lamella holder is ideally between two lines of turbulence channels arranged at the turbulence generator. For the purpose of the greatest possible Stratification of the flow in the flow space the headbox can between all adjacent rows of turbulence channels one each Lamella holder be arranged, each carrying a lamella. The At least one blade also allows the layered storage of the fibers contained in the pulp suspension in the z-direction of the headbox. This can be the fiber tray in the individual layers, in particular in the outer layers, different be. The turbulence channels of the turbulence generator can be at least partially formed by turbulence tubes. The turbulence generator may be provided in particular as a turbulence insert.

Around to reduce the pressure loss in the turbulence generator and thus the to increase the desired effect, possess the provided in the edge zones turbulence channels of the turbulence generator expediently a larger passage cross section than the remaining turbulence channels. Furthermore, in a preferred embodiment, in the middle region the turbulence generator arranged turbulence channels in the machine direction a cross-machine direction dilution device, in particular white water metering device, upstream. In order to Among other things, a sectioned substance density control in the middle and immediately the largest area allows the produced fibrous web.

The headbox can also an upper nozzle wall have, on the outlet side a displaceable by means of several elements and over the machine width extending aperture is arranged. Thereby will be another cost-effective, though effective way created to influence the beam direction.

The object of the invention is procedurally achieved in that the respective peripheral device at least one preferably re includes gelbares supply system for at least one fluid, which preferably supplies the at least one fluid exclusively to a peripheral turbulence channel.

moreover The invention relates to a paper or a cardboard, the or made using the headbox according to the invention has been. The machine according to the invention for producing a fibrous web, in particular paper and / or Cardboard web, characterized in that it is equipped with a headbox according to the invention is provided. In this case, in particular, a fiber orientation control system be provided, which is provided at the end of the machine for Measurement of the fiber orientation cross profile of the fibrous web, a the received measurement signals processing unit and includes the actuators of the headbox.

Further Features and advantages of the invention will become apparent from the following Description of preferred embodiments with reference to the drawing.

It demonstrate

1 a schematic side view of a headbox of a machine for producing a fibrous web;

2 a schematic cross section through the headbox according to the section line AA of 1 ;

3 to 5 three schematic representations of marginal turbulence channels opposite to the machine direction; and

6 a plan view of a fibrous sheet with a diagonal curl.

The 1 shows a schematic side view of a headbox 1 a machine for producing a fibrous web, in particular a paper or board web.

The headbox 1 has a distributor 2 for distributing a pulp suspension 3 in sub-streams T ₁ to T _N over the machine width M (arrow) across. The distribution device 2 is a turbulence generator in the machine direction L (arrow) 4 with a plurality of lines Z ₁ to Z ₄ and columns S ₁ to S ₁₁ arranged turbulence channels 5 and a headbox nozzle 6 downstream. The headbox 1 according to the 1 has only 4 rows and 11 columns by way of example; Further configurations with other values are possible at any time. Moreover, the distributor is 2 according to the 1 designed as a transverse distribution pipe; However, in a further embodiment, it can also be designed as a rotary distributor with a multiplicity of hoses. The headbox 6 is with a pulp suspension jet 8th (Arrow) delivering exit slit 7 Mistake.

Furthermore, the headbox is on both sides 1 a respective edge side arranged and on the respective edge-side column S ₁ , S ₁₁ to turbulence channels 5.1 acting device 9.1 . 9.2 at least for influencing, preferably for controlling the fiber orientation and / or the basis weight provided. The respective marginal device 9.1 . 9.2 comprises at least one preferably controllable delivery system 10 for at least one fluid 11 which is the at least one fluid 11 preferably exclusively a marginal turbulence channel 5.1 supplies.

In the execution of the headbox 1 according to the 1 is provided that for each edge turbulence channel 5.1 a preferably adjustable feed system 10 for at least one fluid 11 is provided. The preferably controllable delivery system 10 includes for each peripheral turbulence channel 5.1 one feed line each 12 that with a preferably adjustable actuator 13 is provided. The single actuator 13 is preferred by an adjustable throttle 14 educated.

Furthermore, in the embodiment according to the 1 it can be seen that the fluid 11 the the headbox 1 supplied high consistency pulp suspension 3 is. The fluid 11 is therefore preferably directly the distributor 2 for distributing the pulp suspension 3 in sub-streams T ₁ to T _N across the machine width M across the supply lines 12 of the delivery system 10 taken. The preferably controllable delivery system 10 for the high consistency pulp suspension 3 is therefore preferably directly with the distributor 2 connected.

In In another embodiment, the at least one fluid can also be a low-consistency Fluid, in particular white water, be. In this case, the fluid for example, by the supply of the delivery system preferably taken directly from the white water tank of the machine become.

Of course you can also the feeder a preferably adjustable, preferably controllable mixed consistency having provided mixing fluid, wherein at least one fluid which fed to the headbox high consistency pulp suspension and another fluid low-consistency fluid, in particular white water, may be.

In general, the respectively supplied Fluid also special chemicals, especially the shrinkage inhibiting chemicals, are added.

Moreover, the headbox has 6 in a known manner a flow space 15 on, passing through at least one with the turbulence generator 4 by means of at least one lamella holder 17 connected lamella 16 is divided. On both sides of the slat 16 Of course, a small marginal gap in the range of 0.1 to 1 mm is obtained. In the execution according to the 1 is the lamella holder 17 between two rows of turbulence channels 5 . 5.1 at the turbulence generator 4 arranged and between all adjacent rows of turbulence channels 5 . 5.1 is ever a lamella holder 17 arranged, each one a lamella 16 wearing.

The lamella holder 17 for holding the respective lamella 16 can, for example, according to the disclosure of the German Patent Application DE 199 62 709 A1 be executed, the content of which is hereby made the subject of the present description.

The respective slats 16 have an at least substantially rectilinear course and they may have different lengths, geometries and / or structures, in particular in the Lamellenendbereichen. In addition, they preferably consist of a CFRP, GFRP, polycarbonate such as Makrolon (r) or Lexan (r), or high performance polymer such as polyphenylsulfone, polyethersulfone, polyetherimide or polysulfone and / or the like.

The turbulence channels 5 . 5.1 of the turbulence generator 4 are at least partially formed by turbulence tubes and the turbulence generator 4 is preferably provided as a turbulence insert.

Also, the headbox has 6 an upper nozzle wall 18 on, at the outlet side one by means of several elements 20 (Double arrow) displaceable and over the machine width M (arrow) extending aperture 19 is arranged. At the elements 20 (Double arrow) may be, for example, known adjusting spindles for the sectional adjustment of the aperture 19 act. The sectional adjustment of the aperture 19 can furthermore be subdivided into "coarse", ie broad effective range, and "fine", ie narrow effective range.

The middle range S ₂ to S _{10 of} the turbulence generator 4 arranged turbulence channels 5 is in the machine direction L (arrow) a transverse to the machine direction M (arrow) divided dilution device 21 (Arrow). At the dilution device 21 it may, for example, be a known white water dosing system, as provided in connection with the ModuleJet® headbox available on the market. The ModuleJet (r) headbox is, for example, in the already cited German patent specification DE 40 19 593 C2 described. It is important, among other things, that the dilution device 21 Submixed streams with different consistency and mixing width provides.

The in 1 illustrated headbox 1 finds its use preferably in a machine for producing a fibrous web, in particular paper and / or board web. In this case, a known fiber orientation control system can be provided, which is a device provided at the machine end for measuring the fiber orientation cross profile of the fibrous web, a processing unit further processing the arithmetic unit and the actuators 13 of the headbox 1 includes.

The 2 shows a schematic cross section through the head box 1 according to the section line AA of 1 ,

The headbox 1 has a turbulence generator 4 with a plurality of lines Z ₁ to Z ₄ and columns S ₁ to S ₁₁ arranged turbulence channels 5 . 5.1 on. The provided in the edge zones S ₁ , S ₁₁ turbulence channels 5.1 of the turbulence generator 5 have a larger passage cross-section D than the remaining turbulence channels 5 the columns S ₂ to S ₁₀ , which are not explicitly shown. In addition, the pitch of the arranged in the columns S ₁ to S ₁₁ turbulence channels 5 . 5.1 be different over the machine width M. For example, the marginal divisions may be larger than the central divisions.

Both sides of the headbox 1 is, as already stated, each arranged at the edge and on the respective edge-side column S ₁ , S ₁₁ to turbulence channels 5.1 acting device 9.1 . 9.2 at least for influencing, preferably for controlling the fiber orientation and / or the basis weight provided. The respective marginal device 9.1 . 9.2 comprises at least one preferably controllable delivery system 10 for at least one fluid 11 which is the at least one fluid 11 preferably exclusively a marginal turbulence channel 5.1 supplies.

In the execution of the headbox 1 according to the 2 is provided that for each edge turbulence channel 5.1 a preferably adjustable feed system 10 for at least one fluid 11 is provided. The preferably controllable delivery system 10 includes for each peripheral turbulence channel 5.1 one feed line each 12 that with a preferably adjustable actuator 13 is provided. The single actuator 13 is preferred by an adjustable throttle 14 educated.

Furthermore, a hatched hinted distribution device 2 for distributing a pulp suspension 3 in sub-streams T1 to TN over the machine width M (double arrow) away. The fluid 11 is the the headbox 1 supplied high consistency pulp suspension 3 , The fluid 11 is therefore preferably directly the distributor 2 through the supply lines 12 of the delivery system 10 taken. The preferably controllable delivery system 10 for the high consistency pulp suspension 3 is therefore preferably directly with the distributor 2 connected.

Further, in the middle region S ₂ to S _{10 of} the turbulence generator 4 arranged turbulence channels 5 in the machine direction L (arrow) a transverse to the machine direction M (arrow) divided dilution device 21 upstream. At the dilution device 21 it may, for example, be a known white water dosing system, as provided in connection with the ModuleJet® headbox available on the market.

The ModuleJet (r) headbox is, for example, in the already cited German patent specification DE 40 19 593 C2 described. It is important, among other things, that the dilution device 21 Submixed streams with different consistency and mixing width provides. The white water strands 22 are shown as dashed arrows.

The 3 to 5 show three schematic representations of marginal turbulence channels 5.1 opposite to the machine direction L (arrow). The fragmentary illustrated turbulence generator 4 includes six lines Z ₁ to Z ₆ According to the embodiment of 3 it is envisaged that the associated peripheral device 9.1 two preferably adjustable feed systems 10 (Arrow representations) for at least one fluid 11 comprising which the respective at least one fluid 11 the lowest and highest edge turbulence channel 5.1 (Z ₁ , Z ₆ ) of the turbulence generator 4 respectively.

On the other hand, in the statements according to the 4 and 5 provided that the associated peripheral device 9.1 two preferably adjustable feed systems 10 (Arrow representations) for one fluid each 11 includes which the respective fluid 11 exclusively in each case one edge-side turbulence channel 5.1 respectively. Furthermore, the associated peripheral device includes 9.1 but also a preferably controllable delivery system 10 for a fluid 11 in which the fluid simultaneously has two edge-side turbulence channels 5.1 feeds, for example in the 4 the two middle turbulence channels 5.1 (Z ₃ , Z ₄ ) and in the 5 the middle turbulence channels 5.1 (Z ₂ , Z ₃ ) (Z ₄ , Z ₅ ) in pairs. Thus, there is the possibility of combining a variety of feeding options. The turbulence channels 5.1 of the 3 and 4 not to the respective institution 9.1 are connected are supplied in a known manner directly from the distributor with pulp suspension. Optionally, a dilution device already described may be provided.

Finally the shows 6 a plan view of a fibrous sheet 23 , in particular paper or cardboard sheet, with a diagonal curl DC shown by arrows. This diagonal curl arises mainly due to different stresses in the outer layers of the fibrous sheet 23 , in turn, from different fiber trays in the individual layers of the fibrous sheet 23 result.

The Inventive paper sheet is characterized in particular by the fact that it is in its z-direction (Height direction) and over its width have different fiber orientations so that eventually a plane or nearly plane paper sheet without curl tendencies arises. The individual fiber orientations have more or less from the average fiber orientation. Of course, the same applies for a Cardboard sheet.

In summary It should be noted that the invention includes a headbox velvet Method of the type mentioned is created in addition to the previous disadvantages of the prior art, in particular the Emergence of the diagonal curl, especially for duplex copy papers, avoids.

1

headbox

2

distributor

3

Fibrous suspension

4

turbulence generator

5

turbulence channel

5.1

Rand Mutual turbulence channel

6

headbox

7

exit slit

8th

Fibrous suspension beam (Arrow)

9.1 9.2

Facility

10

feed

11

fluid

12

feed

13

actuator

14

throttle

15

flow chamber

16

lamella

17

slat supporting

18

Upper nozzle wall

19

cover

20

element (Double arrow)

21

diluter

22

Siebwasserstrang

23

Pulp sheet

A-A

intersection

D

Passage cross-section

DC

Diagonal Curl (Arrow)

L

Machine direction (Arrow)

M

machine width (Arrow)

S1 to S11

column

T1 to TN

partial flow

Z1 to Z4

row

Z1 to Z6

row

Claims (24)

Headbox ( 1 ) for a machine for producing a fibrous web, in particular a paper or board web, with at least one distributor device ( 2 ) for distributing a pulp suspension ( 3 ) in sub-streams (T ₁ to T _N ) across the machine width (M) of time, in the machine direction (L) a turbulence generator ( 4 ) with a plurality of lines (Z ₁ to Z ₄ , Z ₁ to Z ₆ ) and columns (S ₁ to S ₁₁ ) arranged turbulence channels ( 5 . 5.1 ) and a headbox nozzle ( 6 ), which has been treated with a fibrous suspension jet ( 8th ) delivering exit slit ( 7 ), wherein in addition on both sides a respective edge-side arranged and on the respective edge-side column (S ₁ , S ₁₁ ) of turbulence channels ( 5.1 ) acting institution ( 9.1 . 9.2 ) is provided at least for influencing, preferably for controlling the fiber orientation and / or the basis weight, characterized in that the respective edge-side device ( 9.1 . 9.2 ) at least one preferably controllable delivery system ( 10 ) for at least one fluid ( 11 ) comprising the at least one fluid ( 11 ) preferably exclusively a peripheral turbulence channel ( 5.1 ) feeds. Headbox ( 1 ) according to claim 1, characterized in that the respective peripheral device ( 9.1 . 9.2 ) at least two preferably controllable delivery systems ( 10 ) for at least one fluid ( 11 ) comprising the respective at least one fluid ( 11 ) at least the lowest and highest peripheral turbulence channel ( 5.1 ) respectively. Headbox ( 1 ) according to claim 1 or 2, characterized in that the respective peripheral device ( 9.1 . 9.2 ) several preferably controllable delivery systems ( 10 ) for at least one fluid ( 11 ) comprising the respective at least one fluid ( 11 ) preferably exclusively in each case an edge-side turbulence channel ( 5.1 ) respectively. Headbox ( 1 ) according to claim 1, 2 or 3, characterized in that for each peripheral turbulence channel ( 5.1 ) a preferably controllable delivery system ( 10 ) for at least one fluid ( 11 ) is provided. Headbox ( 1 ) according to claim 1, 2 or 3, characterized in that the respective peripheral device ( 9.1 . 9.2 ) at least one preferably controllable delivery system ( 10 ) for at least one fluid ( 11 ) comprising the at least one fluid ( 11 ) at least two peripheral turbulence channels ( 5.1 ) feeds. Headbox ( 1 ) according to one of the preceding claims, characterized in that the preferably controllable delivery system ( 10 ) at least one supply line ( 12 ) provided with a preferably adjustable actuator ( 13 ) is provided. Headbox ( 1 ) according to claim 6, characterized in that the actuator ( 13 ) by an adjustable throttle ( 14 ) is formed. Headbox ( 1 ) according to one of the preceding claims, characterized in that the at least one fluid ( 11 ) the headbox ( 1 ) supplied high-consistency pulp suspension ( 3 ). Headbox ( 1 ) according to claim 8, characterized in that the preferably controllable feed system ( 10 ) for the high consistency pulp suspension ( 3 ) directly to the distribution device ( 2 ) for distributing the pulp suspension ( 3 ) is connected in sub-streams (T ₁ to T _N ) across the machine width (M). Headbox ( 1 ) according to one of claims 1 to 7, characterized in that the at least one fluid ( 11 ) is a low-consistency fluid, in particular white water. Headbox ( 1 ) according to one of claims 1 to 7, characterized in that the supply of a preferably adjustable, preferably controllable mixed consistency having mixing fluid is provided, wherein at least one fluid ( 11 ) the headbox ( 1 ) supplied high-consistency pulp suspension ( 3 ) and another fluid is a low-consistency fluid, in particular white water. Headbox ( 1 ) according to one of the preceding claims, characterized in that the headbox nozzle ( 6 ) a flow space ( 15 ) passing through at least one of the turbulence generators ( 4 ) by means of at least one lamella holder ( 17 ) connected lamella ( 16 ) is divided. Headbox ( 1 ) according to claim 12, characterized in that the lamella holder ( 17 ) between two lines (Z ₁ to Z ₄ ) of turbulence channels ( 5 . 5.1 ) at the turbulence generator ( 4 ) is arranged. Headbox ( 1 ) according to claim 12 or 13, characterized in that between all adjacent rows (Z ₁ to Z ₄ ) of turbulence channels ( 5 . 5.1 ) one lamella holder each ( 17 ), each having a lamella ( 16 ) wearing. Headbox ( 1 ) according to one of the preceding claims, characterized in that the turbulence channels ( 5 . 5.1 ) of the turbulence generator ( 4 ) are at least partially formed by turbulence tubes. Headbox ( 1 ) according to one of the preceding claims, characterized in that the turbulence generator ( 4 ) is provided as a turbulence insert. Headbox ( 1 ) according to one of the preceding claims, characterized in that the turbulence channels provided in the edge zones (S ₁ , S ₁₁ ) ( 5.1 ) of the turbulence generator ( 4 ) have a larger passage cross section (D) than the remaining turbulence channels (D) ( 5 ). Headbox ( 1 ) according to any one of the preceding claims, characterized in that in the central region (S ₂ to S ₁₀ ) of the turbulence generator ( 4 ) arranged turbulence channels ( 5 ) in the machine direction (L) a transversely to the machine direction (L) divided dilution device ( 21 ), in particular white water dosing device, is arranged upstream. Headbox ( 1 ) according to one of the preceding claims, characterized in that the headbox nozzle ( 6 ) an upper nozzle wall ( 18 ), at the outlet side by means of several elements ( 20 ) displaceable and over the machine width (M) extending aperture ( 19 ) is arranged. Process for producing a fibrous web, in particular a paper or board web, in which a pulp suspension ( 3 ) in sub-streams (T ₁ to T _N ) across the machine width (M) of a headbox ( 1 ) with at least one distribution device ( 2 ), which in the machine direction (L) a turbulence generator ( 4 ) with a plurality of lines (Z ₁ to Z ₄ , Z ₁ to Z ₆ ) and columns (S ₁ to S ₁₁ ) arranged turbulence channels ( 5 . 5.1 ) whose turbulence channels ( 5 . 5.1 ) from the pulp suspension ( 3 ) are traversed, on both sides of each edge arranged and on the respective edge-side column (S ₁ , S ₁₁ ) of turbulence channels ( 5.1 ) acting institution ( 9.1 . 9.2 ) is provided at least for influencing, preferably for controlling the fiber orientation and / or the basis weight, characterized in that the respective edge-side device ( 9.1 . 9.2 ) at least one preferably controllable delivery system ( 10 ) for at least one fluid ( 11 ) comprising the at least one fluid ( 11 ) preferably exclusively a peripheral turbulence channel ( 5.1 ) feeds. Paper made using a headbox ( 1 ) was produced according to at least one of the preceding claims. Carton which is made using a headbox ( 1 ) was produced according to at least one of the preceding claims. Machine for producing a fibrous web, in particular paper and / or board web, with a headbox ( 1 ) according to at least one of the preceding claims. Machine according to claim 23, characterized in that a fiber orientation control system is provided which comprises a device provided at the machine end for measuring the fiber orientation cross profile of the fibrous web, a processing unit processing the received measuring signals and the actuators ( 13 ) of the headbox ( 1 ).