FI120595B - Control method and apparatus for controlling the thickness profile of the fiber web and fiber web machine or its part - Google Patents

Description

ADJUSTMENT METHOD AND EQUIPMENT FOR ADJUSTING THE THICKNESS PROFILE AND ITS PART OF THE FIBER MACHINERY OR ITS PART

FIELD OF THE INVENTION

The invention relates to fiber web machines such as paper machines and paper finishing machines 10. In particular, the invention relates to adjusting a paper thickness profile.

BACKGROUND OF THE INVENTION

15 In papermaking and paper finishing machines such as calenders and coating devices, various fibrous web press nipples are used, in a papermaking press section, fibrous web dewatering and / or fiber smoothing press nipples are used, in the calenders, fibrous web calipers and overlapping nipples.

20 · ·: Calendering generally aims to improve the properties, such as smoothness and glossiness, of web-like material such as • · ·: V: paper or board. In the calender, the nips are formed between a smooth-faced press roll, such as a metal roll, and a roll coated with a flexible coating, such as a polymer roll or another metal roll.

In calendering, the web is guided into a nip formed between the rolls to be pressed against each other, i.e. a calendering nip, in which the web is deformed by temperature, humidity and • · nip pressure. The flexible surface roll, such as • · · polymer roll adapts to the surface contours of the web and presses the web opposing T: evenly against the smooth-surfaced press roll such as a thermo roll.

:: 30 ·· »ϊ \ φ Long fiber nipples are used for profiling the fiber web in addition to the conventional roll nipples, ·: ··· in which the web is compressed in a compression zone longer than the conventional roll nip. In addition, the web is pressed through roller-forwarding transfer belt surfaces passing through the roll nipples and / or long nipples 2, such as the belt calender belt surfaces.

Metal belt calendering is a known technique in calendering a fiber web. 5 When calendering paper types, the paper thickness profile must be significantly smoother than is required for paperboard. There are two basic reasons for this. First, the paper has a certain thickness error that is relatively larger than that of the paperboard: e.g., a 5 µm error of 400 µm is 1.25%, but a 5 µm error of 100 µm is 5%. On the other hand, the machine roll easily receives a multiple of 10 turns of paper than cardboard, so cross-machine errors are highlighted when rolling in the machine direction: for example, a cardboard roll of 1500 mm diameter can have 2-4 km of cardboard. A roll of paper of the same size can cover more than 10 kilometers.

15 The thickness profile of the paper is critical especially for the paper roll. If the paper thickness defects are always in the same position in the cross machine direction, the thickness defects will be repeated one revolution per revolution as the paper web is rolled. In the transverse direction of the fibrous web machine, the fibrous web of varying thickness forms a transverse tension profile and a hardness profile in the transverse direction of the machine roll. • ·: Uneven thickness profile of the fiber web • ·: When tensioning the machine roll, tensioning of the machine roll also becomes difficult stages, ··· machine roll unwinding, fiber web longitudinal sectioning and • ·: longitudinal sectional web rewinding to customer rolls. In addition, the tension differences in the partial rolls of the V: customer rolls complicate the printing press. Uneven · [[:: 25 customer roll hardness profiles are a major factor in web breaks in the printing press.

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The diameter profile of the calender roll and the thickness profile of the metal belt calender ··· are particularly relevant to the gloss and thickness profiles of paper.

30 The roller surfaces and belt surfaces that compress the fiber web and participate in the fiber web profiling m in the nipples of the fiber web machine are susceptible to contamination and damage, which is due in part to contamination. The fouling causes additional thickness to the fibrous web clamping member, whereby the fibrous web 3 is subjected to greater compression in the fouled area in the nip clamping nip. Contamination causes difficulties in the loading profile of the press nip and affects the thickness profile of the fibrous web.

It is known in the fiber web machine to adjust the loading profile of the nip either by bending the roll or rolls of the roll or by varying the roll diameter by local heating and / or cooling.

It is difficult to make narrow profile changes in the cross-machine direction by bending the roll. The disadvantages of the heating-cooling method are high energy consumption and slowness.

One method of detecting surface contamination and / or damage through a nip or nip of a paper machine or paper finishing machine such as a calender or coating device is known from WO 99/20836.

The method detects and deals with vibrations generated by machine structures. Said vibrations are detected by means of at least two sensors and, based on the time of occurrence of the vibrations detected by said sensors, the location of the damage and / or contamination on the surface to be monitored is determined.

Y. It is stated in the publication that, based on the location of sources of interference such as impurities, · ·: controls the surface cleaning equipment to be monitored to target • · ·: Y: the cleaning operation in the area of impurities.

Y: WO 2005/075739 discloses a roll cleaning device for cleaning the surface or coating of a roll of a fiber web machine without removing the roll. The roll blade cleaning blade is adapted to be moved substantially • «v .; in the axial direction of the roll to be cleaned, to clean the roll surface over a length of »·· or an optional portion of the surface length.

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30 SUMMARY

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According to a first aspect of the invention, there is provided a method for adjusting the thickness profile of a fibrous web in a fibrous web machine or a post-processing machine, wherein 4 fibrous webs are arranged to pass through a nip or more nip formed between a first pressing surface and a second pressing surface. The method comprises dispensing contaminant material to a first and / or second press surface 5 on a fiber web machine or a post-processing machine at a desired position across the web web direction.

Preferably, the method comprises cleaning the metered contamination material and / or the metered non-metered dirt from at least one of the fibrous web pressing surfaces.

According to a particularly advantageous embodiment of the invention, the method identifies at least one cross-sectional profile of a fibrous web, on the basis of which the dosing of the contaminant material is controlled, such as the thickness and position of the contaminant in the transverse direction of the web.

Preferably, the method detects at least one cross-sectional profile of the fibrous web, on the basis of which the removal of contamination material and / or dirt in the cross-section of the fibrous web is controlled.

Preferably, the method detects a profile size such as hardness or tension in the CD-· · ·: direction of the fibrous web-rolled machine roll or the 20-part rolled customer roll, which controls the dosing of contaminant material and • · ·: V: contamination material and / or dirt in the fibrous web.

Preferably, the method identifies a transverse profile dimension of the fibrous web such as thickness, gloss, basis weight, temperature, amount of coating, or surface topography.

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Preferably, the method identifies a transverse profile measure of the first pressing surface and / or the second pressing surface, which controls the dosing of the contaminant material, such as the thickness of the contaminant and the position in the transverse direction of the fibrous web.

Preferably, the method comprises cleaning contaminated contamination and / or • 5 unaccounted accumulated dirt from at least one fiber web-pressing surface.

Preferably, the method detects a transverse profile measure of at least one pressing surface, such as thickness, temperature, or surface topography 5 such as a diameter difference profile or a thickness difference profile.

Preferably, the first pressing surface is the surface of a soft surface roll such as a polymer roll or soft surface press belt, and preferably the second pressing surface is the surface of a hard surface roll such as a thermal roll or a hard surface press belt such as a metal belt.

The invention is preferably applied in a press or a multi-roll calender or a soft calender or a metal belt calender or a metal belt press or coating device.

15

According to another aspect of the invention, an apparatus is provided for adjusting the thickness profile of a fiber web in a fiber web machine or a post-processing machine, wherein the fiber web is arranged to pass through a nip or multiple nip formed between a first pressing surface and a second pressing surface. The apparatus 20 comprises a dispensing means for dispensing contaminant material to a first and / or second • · ·: V: squeezing surface on a fiber web machine or a post-processing machine at a desired position across the fiber web web.

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Preferably, the apparatus comprises a cleaning means for cleaning the · · · 25 contaminated material to be dispensed and / or the non-dispensable accumulated dirt from at least one surface pressed by the fibrous web.

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Particularly preferably, the apparatus comprises feedback between the transverse: T: profile quantity and the contaminant material dispensing means 30 to control the thickness of the contaminant material and the dispensing position in the transverse direction of the fibrous web.

Preferably, the apparatus comprises a transverse feedback path between the fibrous web web to control the amount and removal position of the contaminant material and / or dirt in the transverse direction of the contour material and / or cleaning means.

Preferably, the apparatus comprises a machine roll rolled from a fibrous web or a customer roll rolled from a partial web 5 to a profile quantity such as hardness or tension in the CD direction and feedback between the cleaning means for controlling contaminant and / or dirt removal amount and outlet position across the fibrous web.

Preferably, the apparatus comprises a machine web rolled from a fibrous web or a customer web rolled from a partial web 10 to a profile quantity such as hardness or tension in the CD direction, and feedback between the dispensing means to control the contamination material thickness and dispensing position in the transverse direction.

Preferably, the dispensing means is adapted to be moved substantially in the axial direction of the roll surface of the fiber web 15 or in the transverse direction of the web surface of the fiber web. Preferably, the load on the cleaning means is variable and adjustable.

Preferably, the contamination material comprises a liquid material or a liquid and. . 20 gas composite material or liquid / solid composite material.

Preferably, the contaminant material comprises a printing ink used for printing or a coating ink or coating pulp used for coating a fibrous web.

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Preferably, the contamination material comprises rapidly consumable material.

• · · • · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Preferably, the apparatus comprises image processing means suitable for processing the image obtained from the fibrous web and / or the fibrous web pressing surface. Preferably, the image processing is based on machine vision or infrared imaging.

• · · • · • · · · · .1. According to a third aspect of the invention, there is provided a fiber web machine or a · · · • · · · · ·. 30, which is adapted to use any of the methods described in claims 1-11.

• · · • · · 7 ·

The arrangement of the invention enables rapid loading and repair of narrow problem areas in the fibrous web. In the nip, the grinding interval of the fiber web pressing surfaces, such as the roll surfaces, can be extended by deliberately causing contamination, particularly in the periphery of the fibrous web web. Other advantages 5 of the invention will be apparent from the following description and claims.

Various embodiments of the present invention will be described or described only in connection with some or some aspects of the invention. One skilled in the art will appreciate that any embodiment of an aspect of the invention may be applied to the same and other aspects of the invention, alone or in combination with other embodiments.

BRIEF PRESENTATION OF THE PATTERNS

The invention will now be described by way of example with reference to the accompanying drawings.

Figure 1 schematically illustrates the relationship between CD profile defects on a rolled machine roll and contamination of the calender roll.

Figure 2 schematically shows the wear of the calender roll from the peripheral region.

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Figure 3 schematically illustrates an embodiment of the invention for profiling a calender roll by adding contamination to the surface of the calender roll and removing v *: contamination and / or dirt from the surface of the calender roll.

• · ·: · * 25

DETAILED EXPLANATION

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In the following description, like reference numerals refer to like parts: T:. It should be noted that the figures shown are not to scale, and that they serve primarily the purpose of illustrating embodiments of the invention.

• · · • · 8

Fig. 1 schematically illustrates the relationship between the CD deflection 1 of the roll of machine roll 1 or the transverse profile defects 1 'of the fiber web machine and the fouling 12' of the calender roll 12.

Figure 1 shows two calender rolls, a soft surface roll 12 (first press surface) and a hard surface roll 11 (second press surface) supported on a fiber web machine frame from its axes 13, and a machine roll 1 at the front of the calender rolls 12 and the machine reel 1 is shown from the front and in the right part of the rolls 10 and the machine reel in Fig. 1 are shown from the side. The dashed fibrous web W, in this example the paper, is calendered in the nip N1 formed between the calender rolls 11, 12. The dotted dashed line 14 indicates that the fibrous web W is rolled directly to the machine roll 1 after the calender nip N1 or after the intermediate steps.

15

In Figure 1, the narrow dirt zones or narrow peripheral dirt areas 12 'on the soft-surface nip roll 12 below appear in the reel or machine roll 1 as narrow zones 1' in the CD direction at which the fiber web W on the machine roll 1 is shimmer and tighter: areas adjacent to zones V. The dirt 12 'has caused localized: V: zone-shaped maximum maxima 12' to the diameter profile of the soft-surface roll 12 in the CD direction, which, when calendering, causes • ·; fiber web W has greater compression than the adjacent \ v regions of the dirt zones 12 '.

• · · 25

The thickness profile of the fibrous web W is critical especially for the paper roll.

When the thickness defects of paper W are always in the same position 1 * 1 • · * ··· * in the transverse direction of the machine as shown in Figure 1, the thickness defects multiply by revolution as the web rolls. The thickness variation in the paper web W due to local ** · 30 load maxima 1 'in nip N1 is up to about a micrometer.

In Fig. 1, the web of variable thickness W in the cross-machine direction of the fiber web machine has, when rolled into the machine roll 1, caused a tension profile of the machine roll 1 of transverse tension which can be detected even visually when compared to Fig. calendar roll paper W rolled machine roll 1.

Figure 2 shows the wear of the soft-surface calender roll 12 in the periphery of the soft roll surface. The two calender rolls shown in the partial section, the hard roll roll 11, for example, the thermal roll and the soft roll roll 12, for example, the polymer roll, form between them a nip N1 in which the web W is calendered.

10

The soft surface roll 12 has a bevel 16 in the soft surface material which is intended to reduce the load on the edge of the soft surface material and reduce the heat transfer of the hard surface roll 11 such as a thermal roll to a soft surface roll such as a polymer roll. The chamfer 16 comprises an outer 15 coarse chamfer 16 'and a lower chamfered micro chamfer 16', which at its inner edge coincides with the cylindrical surface of the soft-surface roll 12.

When calendering the paper web W in the nip N1, the hard surface thermo roll 11 presses the paper web W against the soft surface polymer roll 12. Figure 2 shows: V: 20 how the left edge of the paper web W has worn the surface of the soft-surface roll 12: within the microfiche area 16 ". The worn area is described by reference number 17.

·· · '· [' ·]: The step 17 worn on the left is even palpable • ·:. ·; being at most about the size of a paper web W thickness. The wear shown in t · v: similar to that of the end rolls of the soft roll surface 12 is largely due to the fact that the outermost regions about 5 cm from the edges of the paper web W become drier and thicker than the middle web. area.

• · · • t • · ♦ · * v; In the case where a ·· ♦ wear area 17 reducing the diameter of the soft roll roll 12 is formed in the end region of the soft roll surface 12, the hot surface of the thermal roller 11 may hit the soft surface roll coating 12 outside the paper web. Thus, there is no heat transfer paper web W between the contacting hot hard surface 11 and the soft polymer surface 10, and the soft polymer coating begins to heat and darken outside the paper web W, initially in the microfiched 16 "area on the left side of the paper web. The temperature rise eventually resulting from the wear of the coating 12 causes the roll coating of the soft surface 5 roller to become damaged as it progresses.

Known wear on a soft-surface roll has been known to be repaired by off-machine maintenance machining, whereby the surface of the roll has been removed to create a new actual calendering surface (usually at least at the depth of the worn areas) and the necessary bevels. In this way, the life of the soft surface roller is shortened rapidly. The wear on the roll surface of a soft-surface roll may have been corrected by filling and subsequent grinding, which may have been less material-abrasive than the aforementioned roll total. The most costly material and labor costs are to completely repair the roll coating of the 15 soft rolls by repainting.

Figure 3 schematically illustrates an embodiment of the invention for profiling a calender roll 12 by adding contaminant material 26 '(in this description: V: 20 also used a shorter term contamination 26') to a desired position on the surface of calender roll 12 (preferably the worn edge of calender roll ) and, if desired, removing in process: · ·: accumulated dirt 12 ′ and / or metered contamination 26 ′ at the desired location • · \ v on the surface of the calender roll (during use in the fiber web machine of the calender roll).

(«« 25 According to the idea of the invention, adding contamination 26 'to the surface of the roll is profiling and removing dirt 12' and contamination 26 'from the surface of the roll is • · * ····'.

The contaminant material 26 'is intended to be a material suitable for adhering to the fibrous web pressing surface 11, 12, and which can advantageously provide a uniform and continuous layer of the desired thickness.

• · 11

Figure 3 schematically illustrates a dispensing means 26 for contaminant material 26 'for profiling the surface of roll 12 and a roll cleaning device 20 known per se for profiling the surface of roll 12. Of course, the contaminant dispensing device 26 alone, without the roller cleaning device 20, can profile the surface involved in the pressing operation, which is in the nip N1 that presses the fibrous web W.

The metering means 26 for contamination 26 'and the roll cleaning device 20 are adapted to be moved substantially in the axial direction of the roll 12 to be cleaned or when the press surface 10 is non-roll in and, if necessary, to clean the roll surface along its entire length. According to a preferred embodiment, the dispensing means 26 and 15 of the cleaning device 25 of the contaminant 26 'are adapted to be movable substantially axially of the roll 12 to be cleaned, mounted on a beam 21. The roll cleaning device 20 comprises a guide 22 mounted on a beam 21. The roll cleaning device 20 further comprises a shaft 24 hinged to the body 23 via a joint 23 '20 and a cleaning means 25 attached to the shaft.

Y: In Figure 3, the cleaning means 25 is shown as a brushing brush: j ': or a wafer that can be used to remove dirt / contamination at a desired narrow point on the surface of the calender roll 12 if desired. The cleaning means 25 may also be formed from a scraper blade, scraper or the like. The cleaning means 25 may also be based on the cleaning or de-scaling action of liquids, solvents or solvents.

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The cleaning means 25 may also be based on grinding or cutting or sucking.

The cleaning effect of the cleaning means 25 must be set between 0 and more, that is, the cleaning means is used to remove dirt and / or contamination of a certain point on the pressing surface from the amount of dirt / contamination or even to remove 12 dirt / contamination. below to achieve the desired profiling. The load of the cleaning means 25 is preferably variable and adjustable.

According to a preferred embodiment of the invention, the thickness profiling of the fibrous web 5 utilizes a fluid or a material increasing the diameter of a soft surface 11 or a hard surface 12 nip roll such as a calender roll and / or a fluid surface material or a metal surface. As the contamination material, printing inks and coating dyes or coating pulps for fiber web coating are preferred. One advantageous feature of the contaminant material is that the contaminant material wears out quickly.

Preferably, the contaminant material is dispensed by spraying on the surface whose compression action at the nip that compresses the fibrous web W is desired to be increased. Other modes of administration may also be employed, for example, by brush or roller application.

Preferably, the contaminant material is applied to the desired site on the surface.

the compressive effect of which is to be increased in the nip which compresses the fibrous web W. Preferred locations for dispensing contaminant material are fiber web W

The wear areas in the peripheral areas of the soft surface roll 12.

From the known methods of cleaning, refining and coating a press roll, such as a soft surface roll 12, the method and apparatus of the invention distinguish e.g. the following. Reconditioning of the squeezing roller 12 (e.g., reconditioning of a worn area 17) by increasing · *.: *: Diameter (increasing contamination 26 ') and, if necessary, further reducing • · · 30 roller 12s (cleaning dirt) 12 ', contamination 26') can be made · * · .. during the paper web W manufacturing process without removing the press roll 12 ·: ··· from the fiber web W making machine. Similarly, repairing a metal belt in a nipple clamping a fiber web W such as a metal belt calender by locally increasing the thickness of the 13 metal belts (increasing contamination 26 ') and, if necessary, further reducing the thickness of the belt ( .

5

According to the invention, it is possible to quickly load narrow problem areas on the press surfaces of the fiber web W nip, such as the calender and the metal belt calender, which result in narrow problem areas W in the paper web. variations in gloss and thickness. The caliper roll and calender belt sanding intervals 10 can be extended and cost saved by avoiding premature grinding of soft roll coatings and by using no resources for roll and belt replacements. Similarly, the fiber web manufacturing process does not have to be interrupted during roll and belt changes. In particular, according to the invention, contamination can be intentionally caused on the peripheral area of a calender roll or belt which is worn around the paper web W so that the edges of press surfaces such as rolls in nip N1 begin to bear, i.e. press faces such as rolls hit without any heat transfer between them. paper W.

As control data, the method and apparatus for adjusting the fiber web thickness profile 20 according to the invention may use any of the observed or observed properties of the fiber web W or the fiber web manufacturing or extruding fiber web W in the CD direction of the fiber web machine. This: The property can be detected or detected, for example, by measuring or observing * ·· · • · \ v in any other way described in this specification.

: · * 25 ···

Control information is preferably used to detect a change in a particular position in the · · fiber web manufacturing process. As an example, ·· * can be mentioned the situation where the longitudinal edge of the fibrous web W

'• V: problems with winding of partial webs due to, for example, distorted fiber web W

··· • “m · 30 of the tension profile. Thus, for example, the winder operator may propose to the operator of the calender · * · .. that changes be made to the calendering process, for example *: ··· the compression profile of the W edge of the fibrous web could be changed. The control information 14 may be transmitted manually via the operator or automatically through a parameter measured from the process and transmitted to the process control.

According to one embodiment of the invention, the contaminant dispensing means 26 'determines the thickness (thickness) of the contamination material 26' to be dispensed at each CD direction position and / or the loading of the roll cleaning device 20 (arranged e.g. on the calender) at each CD direction position. Preferably, the feedback information is a measurable profile quantity in the CD-10 direction of the process or of the pressing surface or of the fibrous web W.

Feedback data can be, for example, machine roll 1 or customer roll hardness measurement such as roller BTF or tension measurement, other profile information (e.g. paper web W thickness, gloss, basis weight, temperature, or 15 coatings), or any surface topography metric ) In the CD direction. BTF (Back Tender's Friend) measurement refers to the automated measurement of machine roll or customer roll hardness in CD direction. Quantities can be determined by machine vision or infrared recognition. The feedback may also be a CD directional paper surface topography size or a paper web pressure topography size · ·: a size such as a roll diameter difference profile or a belt thickness difference profile.

Here, preferably, contamination 26 'and / or purification can be effected: j *: contamination 12', 26 'only where these measures are useful for adjusting the desired paper thickness profile. Thus, unnecessary wear on the roll ·, .. · * 25 coating by the cleaning means 25 on the clean areas of the roll and the cleaning means 25 can be avoided by reducing the dispensed • · contamination material 26 'from the desired CD direction position • (e.g. too much).

It should be noted that the desired paper thickness profile obtained by the method and apparatus of the invention is not necessarily straightforward, but that by appropriately profiling the paper web W, the properties of the paper web can be appropriately influenced with the following process steps.

15

According to one embodiment of the invention, the amount of contaminant material 26 'to be dispensed by the contamination dosing means 26 and / or the load controlling the cleaning means 25 of the roller cleaning device 20 at each CD direction position must be manually provided. Such control information may be provided from an operator interface such as a monitor or control potentiometer, respectively, whereby contamination dosing means 26 may be driven directly to a desired contamination 26 'dosing position to add the desired thickness of contaminant 26' or cleaning means 25 directly to a desired contamination desired thickness dirt 12 'and / or contaminant material 26'.

According to one embodiment of the invention, the amount of contaminant material 26 'to be dispensed by the contamination dispensing means 26 and / or the loading of the cleaning means 25 of the roll cleaning device 15 at each position in the CD direction is based on image processing. The image of the roll 12 and / or the machine roll 1 is then formed, for example by means of an image processing program, in a CD directional dirt profile, on the basis of which the above feedback information is formed.

According to one embodiment of the invention, in order to avoid errors in the thickness profile of the fibrous web W, such as paper or board, the metal belt is moved during travel in the transverse direction of the machine, i.e. in the CD direction. In this case, the thickness profile errors caused by the metal belt are not copied to the same · · v .; in the transverse direction of the paper W. In other words, it is advantageous to arrange the • · 25 oscillator during use.

• · * Λ: The paper thickness errors caused by the thickness profile of the oscillating metal belt are not always at the same point in the roll so that the thickness tolerances set on the metal belt do not become too tight. This facilitates the fabrication of 30 metal belts, potentially extends the life of the metal belt and reduces the cost of manufacturing, service and maintenance.

• · 16

The present invention and its various applications are suitable for use in different types of fibrous web production equipment with any uncoated nip roll or with a coated nip roll or with a fiber web thickness caliper and / or gloss for a fiber web pressing fiber surface such as a metal belt calender. The invention can be applied to presses of a fiber web machine, to calenders such as soft calenders and multi-roll calenders, and also to other post-processing devices such as coating devices. Preferably, the invention is applied to nips formed of soft and hard surfaces, but also nips formed of two hard surfaces and two soft surfaces are potential applications.

The foregoing description provides non-limiting examples of some embodiments of the invention. However, it will be apparent to one skilled in the art that the invention is not limited to the details set forth, but that the invention may also be practiced in other equivalent ways.

Some features of the embodiments shown may be utilized without the use of other features. The foregoing description is to be construed as merely describing the principles of the invention and not limiting the invention. Thus, the scope of the invention is limited only by the appended claims.

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Claims (25)

A method of controlling the thickness profile of a fiber web (W) in a fiber web machine or finishing machine wherein the fiber web (W) is arranged to run through a nip (N1) or several nips between a first pressing surface (12) and a second pressing surface (11), characterized in that in the process contamination material (26 ') is dosed in the desired position on a first (12) and / or a second pressing surface (11) in a fiber web machine or finishing machine in the transverse direction of the fiber web (W). 10 Method according to claim 1, characterized in that the method cleans at least one surface (11, 12) which compresses the fiber web from the dosed contamination material (26 ') and / or dirt (12') collected without dosing. 15 Method according to Claim 1 or 2, characterized in that in the process at least one profile size in the transverse direction of the fiber web (W) is determined on the basis of which the dosage of the contamination material (26 ') is controlled, as well as the thickness of the contamination material and position in the transverse direction of the fiber web (W). : Y: 20 Method according to any of the preceding claims, characterized in that: in the method at least one profile size in the transverse direction of the fiber web (W) is determined on the basis of which the removal of the contamination material is controlled: (26 ') and / or the dirt (12') in the fiber web (W). ) transverse direction. • · • · · · · · · · · · · 25 Process according to any of the preceding claims, characterized in that the process determines a profile size of a machine roll (1) created from • · ·: ·:: the fiber web (W) by rolling or a customer roll created from a subway ·· · • · '···' by rolling, such as its hardness or tension in the CD direction, on the basis of • * V: which controls the dosage of the contamination material (26 ') and the removal of the contamination material (26') and / or the dirt (12) collected without dosing in the transverse direction of the fiber web (W). ··· · · · · · · · · · · · 6. A method according to claim 3 or 4, characterized in that the process determines a profile quantity in the transverse direction of the fiber web (W), such as its thickness, gloss, surface weight, temperature, coating amount or a quantity which describes the topography of the surface. 5 Process according to any of the preceding claims, characterized in that in the process a profile quantity in the transverse direction of the first pressing surface (12) and / or the second pressing surface (11) is determined on the basis of which the dosage of the contamination material (26 ') is controlled. the thickness of the contamination and position in the transverse direction of the fiber web (W) 8. A method according to claim 7, characterized in that in the process, a profile quantity in the at least one transverse direction (11, 12) of the pressing surface, such as its thickness, temperature or a quantity describing the topography of the surface, is determined, such as its diameter difference profile or thickness difference profile. Method according to any of the preceding claims, characterized in that the first pressing surface (12) consists of the surface of a soft surface roller, such as the surface of a polymer roller or the surface of a soft surface press band. : Y: 20 Method according to any one of the preceding claims, characterized in that: Y: the second pressing surface (11) consists of the surface of a hardened surface roller, such as a ·: · thermal roller, or the surface of a hardened pressing belt surface, such as the surface of a metal strip. · «· 25 Method according to any of the preceding claims, characterized in that the method applies to a press or calender or soft calender or metal band calender or metal band press or coating device. • · • · ♦ ♦ · ♦ • · • · ·: .Y 30 12. Device for controlling the thickness profile of a fiber web (W) in a: ***: fiber web machine or finishing machine where the fiber web (W) is arranged to run through a nip (N1) or through several nips between a first pressing surface (12) and a second pressing surface (11), characterized in that the device comprises a dosing means (26) for dosing contamination material (26 ') in the desired position on a first (12) and / or a second (11) pressing surface in the transverse direction of the fiber web (W) in a fiber web machine or finishing machine. Device according to claim 12, characterized in that it comprises a cleaning means (25) for cleaning the eating at least one surface (11, 12) which presses the fiber web from the dosed contamination material (26 ') and / or dirt (12') collected without dosage. Device according to claim 12 or 13, characterized in that it comprises a back link between a profile quantity in the transverse direction of the fibrous web (W) and the metering means (26) for the contamination material (26 ') for controlling the thickness of the contamination and the dosage position in the transverse direction of the fibrous web (W). Device according to Claim 13, characterized in that it comprises an interconnection between a profile size in the transverse direction of the fiber web (W) and the cleaning means (25) for controlling the removed amount of contamination material (26 ') and / or dirt (12') and the removal position in the transverse direction of the fiber web (W). 20 Device according to claim 13, characterized in that it comprises a · · · coupling between a profile size of a machine roll (1) created from the · · · fiber web (W) by rolling or a customer roll created from a sub-track by rolling, such as its hardness or tension in the CD direction, and • · ·. ···. The cleaning means (25) for controlling the removed amount of contamination material (26 ') and / or dirt (12') and the removal position in the transverse direction of the fiber web (W). »·· • · • · · · · .v, Device according to any of the claims 12-16, characterized by »» ·. ···. It comprises an interconnection between a profile size of a machine roll (1) created from the fiber web (W) by rolling or a customer roll created from a subway by rolling, such as its hardness or tension in the CD. the direction, and the metering means (26) for controlling the thickness and metering position of the contaminant material (26 ') in the transverse direction of the fiber web (W). Apparatus according to any of the claims 12-17, characterized in that the dosing means (26) is arranged substantially movable in the direction of the axis of a roller surface (11, 12) pressing the fiber web (W) and in the transverse direction of a band surface which presses the fiber web (W). Device according to claim 13, characterized in that the load on the cleaning means (25) can be changed and adjusted. 10 Device according to any of the claims 12-19, characterized in that the contamination material (26 ') comprises liquid material or combination material of liquid and gas or combination material of liquid and solid. 15 Device according to any of the claims 12-20, characterized in that the contamination material (26 ') comprises printing ink used in printing or coating paint or coating material used in coating the fiber web (W). : V: 20 • ·: 22. Device according to any of the claims 12-21, characterized in that: the contamination material (26 ') comprises material that is worn quickly. • 1 • · · • · · • · · ·: .0 Device according to any of the claims 12-22, characterized in that it comprises image processing devices suitable for processing an image on the fiber web (W) and / or a surface (11,12) which presses the fiber web ( W). Fiber web machine or part thereof adapted to use the method: V: according to any of claims 1-11. ··· 30 ··· • · • · · «» · '• · ♦ • · ·