EP2415701A2 - Method for wrapping a sheet of material and roll cutting device - Google Patents

Abstract

The roll winding apparatus (1) has a winding core, particularly a winding tube (10), which is applied to a winding roll (3), where a winding hardness generating element (15) is provided which is free from contact of a winding roller (9). The winding hardness generating element is arranged just before the winding roll. An independent claim is also included for a method for winding a material web, particularly a paper or board web.

Description

The invention relates to a roll winding device for winding a material web, in particular a paper or board web, on at least one winding core, preferably a winding tube, to a winding roll on which at least one roll bears during winding.

The invention further relates to a method for winding a material web, in particular a paper or board web, on at least one winding core, preferably a winding tube, to a winding roll, by means of a roll winding device having at least one roller, which during a winding process on the at least one winding roll is applied and is influenced by means of a prevailing in the web tension or elongation.

The invention will be explained below in connection with the treatment of a paper web. However, it is also applicable to other webs that are similar to handle. These are, for example, but not exhaustive, to webs of cardboard, cardboard, plastic or metal foils.

Paper webs are produced in relatively large widths of up to more than 11 m in a paper machine. The production is almost endless. In this case, the machine direction of the paper machine defines the longitudinal direction for all machines and devices located in the paper factory and the transverse direction perpendicular thereto in the horizontal plane. In order to simplify the present document, the following will be referred to at appropriate places Longitudinal direction as MD (Main Direction) or X-direction, the transverse direction as CD (Cross Direction) or Y-direction and the height direction perpendicular to a plane defined by these two directions called vertical direction as Z-direction. At the end of the paper machine, the paper web produced is wound in full width onto a winding core. This winding core is replaced cyclically, usually during production. The resulting web-width winding roll is commonly referred to as mother roll or full tambour. In order to be manageable for a later user, for example a printing company, the paper web wound on a mother roll has to be cut into several parallel partial webs whose widths are suitable for the respective later user. These widths can vary greatly from case to case, so that the division of the paper web is usually made according to an individually definable pattern. The partial webs are then wound into winding rolls, which are called Teilbahn- or finished rolling and are issued together as a so-called roll throw. The pattern can be changed from roll throw to roll throw. The slitting and winding is conveniently carried out in a single machine, which is then often referred to as a slitter.

All of the winding devices described above, ie those for the production of parent rolls as well as those for the production of partial web or finished rolls, has in common that the train to be wound up to form a winding roll forms a winding nip with at least one winding roller on which it is supported or on it on or rests and which is accordingly referred to as a support or support roller. These, directly with the forming winding rollers in contact winding rollers, thus also provide the immediate acting Tools is by means of which the winding quality can be influenced. The understanding of winding quality is determined from the perspective of the customer and today defined by numerous objective and subjective parameters. Simply speaking, the paper webs unwound from the finished rolls should be able to be processed without interruption and good printing results to be achieved.
For this purpose, in particular a trouble-free run in the unwinding of the printing machine is necessary, which requires a central winding roll structure, a symmetrical sleeve seat and a favorable winding hardness profile in the winding roll.
Furthermore, the individual winding roll should be free of winding defects, in particular free of crevices, places, bars (which are also known as washboard pattern or rope markings), star formation, lateral positional shifts and markings on the material web surface.

To achieve these goals, a variety of facilities and provisions related to the design of reel winders are known.
Based on the paper parameters on the winding process influencing basic parameters such as basis weight, density, compressibility, friction coefficients, smoothness, moisture content and CD and MD profiles are the expert machine on the machine side to influence the winding roll formation essentially the choice of winding principle, driving data, such as web tension and Speed and different vibration damping methods available.
It is disadvantageous that all measures hitherto known from the prior art are directly related to the design, storage or use of devices in contact with the at least one winding roll, in particular, the at least one roller and thus are in direct interaction with the introduced by the winding rollers in the winding process parameters such as roll diameter, roll weight, roll width, their winding hardness, trained winding defects and eccentricities or eccentricities and in particular their excitation and self-oscillation behavior.

The invention is therefore based on the object to further develop a device for winding a web on a winding roll such that the winding structure improves and in particular the conditions in the winding area are stabilized.

According to the method, the object of the invention is to improve the winding structure over long process sections and to stabilize the winding process.

The object of the invention is achieved according to the device in that the roll winding device comprises a winding hardness generating device which is free of contact with the at least one winding roll.

The term "winding hardness" is understood to mean the web tension wrapped in the individual layers of the winding roll.
As already mentioned, the present invention should be described in particular in connection with the treatment of paper. Paper and paperboard belong to the group of biopolymers as pulp-based fiber webs and are consequently characterized under load by a viscoelastic behavior, ie have a partially elastic, partially viscous behavior. Such behavior is due to a delayed equilibration of the Macromolecules to each other during and following an external load. At first, therefore, the strain increases with time. After relieving the material then relaxes only incomplete, the remaining energy is degraded time-dependent in the form of flow processes (retardation). This always leaves a certain amount of plastic strain. Plastic and composite films have to a limited extent a behavior with similar tendencies. As a rule, however, the ratios of the technically usable parameters develop very differently here.
According to the invention, therefore, at least one winding hardness generating device is provided, which is free of contact with the at least one wound roll to be produced, wherein the winding hardness generating device is characterized in that the increase in the web tension generated by it at least not complete by relaxation or Retardationsprozesse before wrapping in the Winding roll is dismantled.
It is particularly preferred if the winding hardness generating device has an efficiency of at least 20%, wherein the efficiency is understood as the ratio of actually preserved winding hardness to applied web tension increase. The preserved winding hardness increase rate is measured after completion of the winding process and compared with the winding hardness of a winding roll, which was wound without the influence of the winding hardness generating device according to the invention but otherwise the same circumstances.
The aim is even an efficiency of at least 30%, in particular at least 50%, very particularly at least 70%. An efficiency below a few percent, which may well be well below today still common Bahnzugschwankungen is +/- 10%, is no longer understood as winding hardness generating device in the strict sense. However, it can be provided that also the achievable efficiency can be actively influenced within a certain scope. For this purpose, for example, the distance of the winding hardness generating device to the forming winding roll can be varied.
The winding structure is therefore relatively uncomplicated with a device according to the invention, that is to say largely free of complicated feedback in the winding system consisting of the at least one roller and the at least one forming winding roll and the winding structure can be improved. In particular, the conditions in the winding, so in particular in the aforementioned winding system can be stabilized and winding errors can be reduced or even completely avoided.

It is advantageous if the voltage or elongation which can be preserved in the material web by means of the winding hardness generating device (and at least partially preserved in the winding roller) can be modifiable, preferably adjustable, particularly preferably controllable or controllable.

In this way, it is particularly well possible to act on the material web or the material web section to be treated (seen in MD or CD) according to the respective requirements. Under a Changbarkeit can be understood in this case, a passive reactivity of the winding hardness generating device. An adjustability is intended in particular to draw attention to the preliminary tuning with regard to the material web to be treated, in particular, for example, with regard to its basis weight, compressibility or tear resistance. Of course, particularly advantageous is a controlled or even regulated adaptation.

It is of great advantage if the at least one winding hardness generating device is arranged immediately before the first nip formed by the at least one roller and the at least one winding roller.

For this purpose, the winding hardness generating device according to the invention can be seen in the web running direction a few centimeters to a few meters away from said nip. In principle, it is also conceivable that between the winding hardness generating device and this nip a guide roller, which is otherwise without influence, is arranged between. However, it is particularly preferred if no arrangements which are not directly related to the winding hardness-generating device are provided between it and the nip.
By such designs, a particularly high efficiency can be achieved.

It is advantageous if the winding hardness generating device is sectioned in CD or if several winding hardness generating devices are arranged side by side in CD.

In this case, the individual sections or the winding hardness generating devices arranged next to each other can preferably be controlled individually or in groups.
In this way, divided or undivided webs in the CD direction continuously or in sections with different web tension increases can be acted upon. Thus, the winding structure Seen individually over the width of the material web. In particular, transverse profile fluctuations, but also uneven machine influences, such as vibration tendencies or irregularities of the rollers acting on the at least one winding roller, can be effectively compensated, whereby the winding structure can be improved and the conditions in the winding area are particularly well stabilized.

It may be preferred that the winding hardness generating device is controllable and / or controllable on the basis of measurement data which are determined before the material web enters the roll winding device, that is to say in particular in a material web production machine, for example a paper machine.

That is, the winding hardness generating means is operatively connected to a feed-forward, which feedforward obtains measurement data obtained during the material web generation. The measured data can be determined at discrete time intervals and, distributed over the y-direction of the resulting material web, in a stitch-point or regularly distributed manner. However, a continuous, in particular web-wide detection of required parameters, in particular the thickness profile in MD and CD, web tension fluctuations, possibly the smoothness, the coefficient of friction, the moisture profile or the layer thickness of already applied finishes, in particular paints, is preferred.
The winding hardness generating device can thus, in particular with the aid of a stored, possibly changeable control concept, always act in an ideal manner with regard to the actual situation of the material web that is due to it. Thus, single or multiple Special Wickelfehlertypen targeted avoided or at least reduced.

Likewise, it may be preferred that the winding hardness generating device is controllable and / or controllable on the basis of measurement data which are determined in the roll winding device, in particular on the at least one wound roll to be produced and / or on at least one roll.

In this case, the winding hardness generating device is operatively connected to a feed back which resets information about the effects of the winding hardness generating device to the latter and thus serves as a control parameter. An advantage of such a scheme is that it can also detect effects of the winding process with or at least can capture and required hardware is inexpensive and reliable available.

With particular advantage, the roll winding device on a longitudinal cutting edge.

Such a longitudinal cutting section has a number of mostly disk-shaped cutters adapted to the possible pitches and serves to produce sub-webs arranged side by side in CD. A roll winding device having such a longitudinal cutting edge is then, as already mentioned, generally referred to as a roll cutting device.
In the embodiment, the person skilled in the art distinguishes between two basic types of construction, namely the carrier roll and the backup roll scooter.

In a roll-up type characterizing the backup roller type, each individual roll to be wound is wound in a separate winding station. The rollers are supported during the winding process on a support roller. Depending on the design, one to two back-up rolls and occasionally additional support rolls are used. The Teilbahnbeziehungsweise finished rolls are wound in their winding stations on cores, which are each held by an imported pair Spannbeziehungsweise guide heads. The rollers are driven either via these clamping or guide heads with center winding or on the at least one support roller with circumferential winding or combined.
However, particular attention is to be paid in the context of the present document to the carrier roll type, for which a roll-up device is characteristic, in which the entire roll throw in a winding bed, which usually consists of two support rollers, is wound on winding tubes. The winding tubes of the roller throw can be held by means of tensioning or guiding heads or, in rarer cases, through winding shafts inserted into the winding tubes. The rolls are wound up together, as a complete throw. As a rule, this is done by means of a circumferential winding, for which purpose at least one of the two support rollers can be driven. If a winding shaft is used, a center winding or a combination of both can also take place.
For the purposes of the present specification, winding rolls wound around a band and / or around the forming winding rolls from a support into a support position are also understood to mean supporting or supporting rolls.
In roll winder devices configured as a roll cutting device, the winding hardness generating device according to the invention can be used particularly effectively since such devices generally offline, that is, from the material webmaking machine, here the paper machine, are separated and therefore confronted as discontinuous devices with additional special problems: they must namely follow the continuously developed production output of the paper machine. Since set-up, acceleration and deceleration times occur relatively frequently in accordance with the task of reducing the format, this can only be compensated for by significantly higher production speeds.
However, such high demands on the winding speeds involve an additional high risk potential due to vibrations occurring.
The winding to be produced hardly takes on an ideal round shape. Small winding errors, for example, due to slight profile fluctuations of the paper web to be wound, add up with each full wrapping. It can then come with each revolution also contact losses or at least different line loads. Paper-technological correlations, such as compressibility or coefficient of friction of the web, then lead to inhomogeneous roles.
Already at a semi-critical speed, which corresponds to about half the resonance speed of the role, it comes to strong deformation of the role. These deformations are also referred to as s2 impact or 2f impact and, in a constant interaction, also have a direct effect on the components of the reel winder that are in contact with the reel, that is to say in particular on the reels to be produced. or at least co-responsible for the phenomena known to those skilled in the art as roll hum or roll swings.
In practice, therefore, a section-corresponding treatability of longitudinally divided partial webs is of particular importance. On This way can then individually individually juxtaposed winding rolls are treated individually. By individually influencing the development of their winding-hardening structure, they can be qualitatively improved. Winder rolls located side by side in a common winding bed can be controlled in their radial growth by the individual application by means of the winding hardness generating device according to the invention. This makes it possible despite existing cross-sectional variations to achieve a uniform growth of the individual, juxtaposed winding rollers or at least promote. In this way, it is possible to ensure that all individual rollers are always in contact with the rollers acting on them and, preferably, all the winding rollers of a common winding roller throw experience substantially equal line loads through the rollers acting on them. Due to their parallel stabilization during the winding process and quality losses due to vibrations or bobbin movements can be minimized or even prevented. Thus, high-quality bobbins can be produced even at high production speeds. In addition, the overall process is stabilized, whereby the entire reel winding apparatus is spared. Production losses are avoided and maintenance costs are reduced.

It is particularly preferred that the winding hardness generating device comprises a web deflection device, by means of which the material web is stretchable such that at least part of the material web elongation is conservable in the wound roll to be produced.

Such a web deflection device can advantageously consist of a roller which penetrates into the plane of the moving material web. In this way, the web is deflected from its direction. While maintaining all environmental parameters, the material web is then forced to bypass the "obstacle", ie the roll surface, which has penetrated into its raceway at a locally higher speed, which causes tensile stresses in the material web which essentially depend on the penetration depth of the roll. It is also conceivable that the roller of the material web independently, for example centrally, is driven and subjected to a differential speed.
The tensile stresses thus produced in the material web have an effect on elongation, which would be degradable via the relationships explained above only after a certain duration. According to the present invention, however, the material web is disturbed during the stress relaxation by the friction forces which become effective during the formation of the lap during the relaxation and retardation processes which have not yet been completed and thus preserved in the forming wound roll.

As already mentioned, it is particularly advantageous if such a web deflection device consists of several rolls or roll segments arranged side by side in CD. The rolls or roll segments can be very narrow in order to allow the most individual possible web treatment. Preferably, they have a width between 5cm and 30cm. In practice, however, it is already advantageous if a width between 50cm to 80cm or even up to 100 cm is maintained. The individual rollers or roller sections then have adjustable, support bearings which are movable by adjusting devices themselves or via the connecting elements connected to them. It is particularly advantageous if a drive is provided by means of which a plurality of adjusting devices can be actuated. Through the use of a central drive for multiple adjustment is Saved space and equipment for the winding hardness generating device.
Furthermore, this facilitates the maintenance and the effort for the energy supply.
Preferably, the drive with the adjusting devices via a clutch and disengageable. So it is possible in a simple way to control each adjustment separately and operate.
It is advantageous if the adjusting device is formed by a spindle drive. The drive acts on a spindle in a fixed spindle nut or on a rotatably mounted spindle nut connected to the spindle. As a result, the spindle is moved axially, and you can also adjust the or attached to this spindle (n) support bearing.
The drive is advantageously one that includes a circulating belt. Such a belt or a drive belt takes up very little space and can be easily integrated into the carrier of the adjusting device.
It may also be beneficial if the adjusting device is designed as an eccentric. The aligned in the Y direction of the fibrous web drive acts on individual cam gear elements, which are designed as eccentric. Such a trained transmission is able to transmit high forces.
Advantageously, it is ensured that the adjusting device has a locking element. This locking element serves to ensure that the adjusted support bearing retains its new position during production. In general, it is sufficient if the thread pitch of the spindle has a self-locking. To be sure, but also an additional clamping mechanism can be used.
It is particularly advantageous if a direct or indirect position detection is provided for the support bearing, whereby the control or adjustable adjustment during production is particularly simplified.

In some cases, it may also be preferred that the winding hardness generating device comprises a nip generating device, by means of which the material web is stretchable such that at least part of the material web elongation is conservable in the wound roll to be produced.

Also, by means of a nip acting on the material web-a Nips- can apply a tensile stress in a web. For this purpose, the nip is formed from at least one pair of rollers. The nip can be varied in height and can be brought into contact with the material web again and again. Significant influencing parameters, while in contact, are the forces acting in the nip normal to the running direction of the material web and the surface properties of the nip-producing rolls.
It is advantageous in such a nip producing device that the exposure time can also be extended with its advantages described below. For this purpose, for example, a so-called broad nip, as it is known from calendering, be provided. Also, the nip may be formed by a circulating around at least one pair of rollers belt. The disadvantage, however, is that greater consideration must be given to the effects with regard to the surface of the material web.

It is advantageously ensured that the winding hardness generating device comprises a device by means of which at least the surface of the material web can be heated or cooled.

Under the influence of heat, the material web to be treated, like any other material, expands slightly. During wrapping, the material web, which has only been heated for a short time, cools down again, a contracting being limited by the already acting frictional forces with the winding layer or layers in contact with the considered material web region. This compensates for part of the web tension receded between the winding hardness generating device and the winding roll and artificially increases the efficiency of the winding hardness generating device.

However, since temperature-dependent web tensions build up and down simultaneously in all directions, they can also lead to winding defects in the winding, for example crepe creases or places. Therefore, it may occasionally be appropriate to cool a too warm web of material just before winding.

It is further preferred that the winding hardness generating device comprises a device by means of which at least the surface of the material web can be subjected to moisture.

As a result, the expansion behavior and the coefficient of friction of the material web can be influenced. Moistening should then increase the total residual moisture content of the paper web by about 0.3% to 2%.

With great advantage, the winding hardness generating device is clockable.

Surprisingly, a clocking of the amount of voltage introduced into the material web can positively influence the uniformity of the course of the winding hardness. It is assumed that the relaxation and the retardation process are disturbed and in consequence where the difference in the energetic degradation of the introduced voltage is higher or at least equivalent, as the loss of difference due to the short load breaks when applying the voltage and the voltage curve within the material greatly homogenized.
Depending on the grade and grammage, high frequency clocking with comparatively small amplitudes may be preferred.

With particular advantage, the contact time for generating the tension or elongation that can be introduced into the material web by the winding hardness-generating device can be changed in its amount, preferably adjustable, particularly preferably controllable or controllable.

In this way, another important parameter for modifying the amount of web tension generated is available. This is especially important if, for example, the forces have to be applied carefully on sensitive types of paper or surfaces have to be protected. Due to the viscoelastic behavior of paper, cardboard, cardboard or plastic webs, a connection between exposure time and recovery time (= relaxation plus retardation) can be seen in experiments. If the exposure time is prolonged, the reset time is also extended. Under otherwise identical environmental conditions, that is, in particular the same distance of the winding hardness generating device of the winding roll and the same winding or web speed is thus an increase in the efficiency achievable.
Possible technical implementation examples are already mentioned above in connection with nip-generating embodiments of winding hardness generating devices.

However, it is also possible to change the diameter of a roller immersed in the material web described above. In addition, a wing-like element can also be immersed in the web such that, like an aircraft wing, it is directed against the incoming material web and its depth of immersion and / or setting angle is variable.

The object of the invention is achieved in that the material web is treated during at least a temporal portion of the winding process by means of a winding hardness generating device, which influences the voltage present in the web or stretching to generate winding hardness, in particular increases, and the winding hardness generating device free from contact which is at least one, in the winding process under an increase in diameter forming winding roll.

In this way, it is possible for the first time to influence the winding hardness or the winding hardness profile of the forming winding roll free of direct feedback from the winding system formed from the at least one roll and the forming wound roll. By such an influence, the winding process can thus be influenced in addition and beyond even very free and uncomplicated. Thus, the winding results to be achieved, in particular the quality of the wound roll structure over the entire winding process, but at least over long process sections, significantly improve and stabilize the conditions in the take-up area. Winding faults can be effectively reduced or even avoided, even by types.

It is particularly advantageous if partial webs generated by a longitudinal cutting section by means of a CD in Sections sectioned winding hardness generating device or CD several juxtaposed winding hardness generating devices are treated individually.

In this way, the method according to the invention can be used particularly effectively, since this relatively compulsory treatment method for the individual influencing of the material web cut into individual partial webs and the partial web or finished rolls forming therefrom is particularly well suited.
Namely, with the method according to the invention, the forming part web rolls can actually be treated with regard to their differences described in the introductory part. This is particularly valuable when a roll of a winding system is in contact with a plurality of juxtaposed winding rolls, namely in a support roll winding device or the like. In such winding systems are, according to the prior art, namely namely always executable as a compromise of all, forming in a roll throw, winding rollers.

It is preferred that the diameter increase of the at least one winding roll forming in the winding process is influenced by means of the winding hardness generating device.

It is particularly preferred that the diameter increase over at least one temporal winding section, as seen in the Y direction, locally influenced differently. By means of the winding hardness generating device to be wrapped in the winding roll web tension, for example, according to measurement specifications according to the description of the device according to the invention, increases and the diameter increase thus reduced accordingly. On In this way, anisotropies in the forming winding roll can be avoided and consequently also their running behavior can be improved, which again stabilizes the entire winding process and avoids or at least reduces otherwise occurring disturbance variables, such as vibrations.

In a method according to the invention, it is very preferable that, with the aid of the winding hardness generating device, the increase in diameter of winding rolls produced by partial webs is made uniform within a roll throw.

In particular, when several forming winding rollers lie simultaneously on a roller, in particular on a support roller or a pair of support rollers, so in the so-called winding bed, rest, the winding roller the requirements of each bobbins only differently meet. A vote of the resulting winding system is structurally executable only as a compromise solution. In practice it is observed that the diameters of individual winding rolls of a single roll throw differ by up to 3 mm, sometimes even more, with a final diameter of about 1500 mm. This corresponds to a diameter difference of about 0.2%. In general, the winding rolls located in the middle region of the original material web width seen in CD are of smaller diameter than the rolls in the edge region. As a result, it comes here to contact losses that bring various disadvantages described in the introduction with it and as mentioned in consequence of forming vibrations and shocks can lead to ejection of tons of bobbins from the winding bed or the reel winding device.

By equalizing the diameter of the individual partial web rolls vibrations can be avoided. Since the individual bobbins then can not move uncontrollably, but rest on the one or more rollers and are guided, harmful forces can not be effective. The expected diameter differences between the individual winding rolls can be reduced by about a factor of 1.5 to 8. The winding process is clearly stabilized. The winding speed can be increased even with high quality requirements for the winding quality. As a result, process costs can be reduced. Production losses and repair costs can be minimized.

Further advantageous embodiments of the invention will become apparent from the description, the embodiments and the figures illustrated. The invention is explained in more detail below with reference to exemplary embodiments with reference to the drawings.

Figur 1

Eine Seitenansicht einer erfindungsgemäß ausgestatteten Rollenwickelvorrichtung in Form einer als Tragwalzenwickler ausgebildeten Rollenschneidvorrichtung

Figur 1a

Stark vereinfachte dreidimensionale Ansicht

Figur 2

Eine Detailansicht einer erfindungsgemäßen Wickelhärteerzeugungseinrichtung, die eine Bahnauslenkungseinrichtung umfasst in einem ersten bevorzugten Ausführungsbeispiel

Figur 3

Eine Detailansicht einer erfindungsgemäßen Wickelhärteerzeugungseinrichtung, die eine Bahnauslenkungseinrichtung umfasst in einem zweiten bevorzugten Ausführungsbeispiel

Figur 4

Eine Detailansicht einer erfindungsgemäßen Wickelhärteerzeugungseinrichtung, die eine Bahnauslenkungseinrichtung umfasst in einem dritten bevorzugten Ausführungsbeispiel

Figur 5

Eine Detailansicht einer erfindungsgemäßen Wickelhärteerzeugungseinrichtung, die eine Bahnauslenkungseinrichtung umfasst in einem dritten bevorzugten Ausführungsbeispiel

Figur 6

Eine Detailansicht einer erfindungsgemäßen Wickelhärteerzeugungseinrichtung, die eine Niperzeugungseinrichtung umfasst in einem ersten bevorzugten Ausführungsbeispiel

Figur 7

Eine Detailansicht einer erfindungsgemäßen Wickelhärteerzeugungseinrichtung, die eine Niperzeugungseinrichtung umfasst in einem zweiten bevorzugten Ausführungsbeispiel

Figuren 8a und 8b

Schematische Schnitt- und Seitenansicht von Materialbahnprofilen

Figur 9

Eine Seitenansicht einer erfindungsgemäß ausgerüsteten Rollenwickelvorrichtung zur bahnbreiten Aufwicklung von Materialbahnen

In these show:

FIG. 1

A side view of an inventively equipped reel winding device in the form of a trained as a carrier roll winder slitter

FIG. 1a

Very simplified three-dimensional view

FIG. 2

A detailed view of a winding hardness generating device according to the invention, which comprises a web deflection device in a first preferred embodiment

FIG. 3

A detailed view of a winding hardness generating device according to the invention, which comprises a web deflection device in a second preferred embodiment

FIG. 4

A detailed view of a winding hardness generating device according to the invention, which comprises a web deflection device in a third preferred embodiment

FIG. 5

A detailed view of a winding hardness generating device according to the invention, which comprises a web deflection device in a third preferred embodiment

FIG. 6

A detailed view of a winding hardness generating device according to the invention, which comprises a nip generating device in a first preferred embodiment

FIG. 7

A detailed view of a winding hardness generating device according to the invention, which comprises a nip generating device in a second preferred embodiment

FIGS. 8a and 8b

Schematic sectional and side view of material web profiles

FIG. 9

A side view of an inventively equipped reel winding device for web-wide winding of webs

The in the FIGS. 1 illustrated preferred embodiment of a roll winding device 1 according to the invention is realized in connection with a trained as a support roll winding device roll cutting device. Essential components of this slitter-winder 1 are an unwinding device 4, in which the paper web M, which is essentially width-wise of the working width of one of the slitter-winder 1 and not shown here, is withdrawn from a mother roll 5, a cutting section 6, in which the paper web M for the production of partial webs M 'in selectable width formats of their direction of longitudinally divided and a settled in the field of their winding winding arrangement. 2
The cutting section 6 comprises for this purpose as essential components usually disk-shaped cutting devices, which are shown here in the form of interacting upper blades 7a and lower blades 7b. In order to prevent vibrations of the moving material web M in the region of the cutting section 6, this region is limited in the example shown by deflection rollers 44.
The winding arrangement 2 has two support rollers 14, of which at least one is drivable. Preferably, both support rollers 14 are driven and are connected via a common control and / or regulating device 19 in connection. It has been proven that the speed-controlled in the direction of the paper web M, the first support roller 14 and the second support roller 14 is torque-controlled. Also, an elastic storage at least one support roller 14 is conceivable. Likewise, the axes 13 of the support rollers 14 on different Height levels be stored in the z direction. Furthermore, the support rollers 14 may have different diameters. Of course, at least one of the two carrier rollers 14 may also have a coating or casing which becomes effective on the material web M, while, for example, the other carrier roller 14 is designed as a steel roller. Furthermore, at least one of the support rollers 14 may have a passive or active damping or a repayment element. However, these advantageous embodiments are known to the person skilled in the art and are not shown here in detail for reasons of clarity.
In addition to the support rollers 14, the at least one winding roller 9 to be wound and the support roller 3 form essential elements of the winding arrangement 2 FIG. 1 only the front side of a single winding roll 9 is visible, is intended for, except in connection with the FIG. 9 , described examples are assumed that in the Y-direction extending in the image plane further winding rollers 9 are exactly behind the winding roller 9 shown, in the formed from the two support rollers 14 winding bed 2a.
The forming during the winding process winding rollers 9 consist in their core each of a winding tube 10, with the beginning of a finite portion of a paper web M, or a sub-web M ', connected and then spanned by continuous wrapping to form so-called winding layers , The tension or elongation prevailing in the paper web M is then hindered in the wound-up state in its rearrangement process described at the beginning due to frictional forces which become effective. The magnitude profile of the tension prevailing in the paper web or stretching from winding layer to winding layer, ie between local regions of the paper web M wound onto the winding tube 10, is such mentioned at the beginning, the most important characteristic feature for the quality assessment of the winding quality. Of course, the magnitude of the stress or strain course should follow a continuous course, even if here the sake of intuition of stress differences between the winding layers, ie locally adjacent areas is mentioned.

As mentioned above, the paper web M has tiny profile differences in MD and in CD and also shows the smallest tolerances in their material properties, in particular in their friction coefficients and their compressibility. These differences, once qualitative in the FIGS. 8a and 8b Of course, depending on the type of paper, the quality of the processed raw material, and especially on the paper-making machine. Although the mentioned tolerances for high-quality paper grades, which were produced on modern high-tech machines, can only be detected using high-resolution measuring methods, they have a decisive influence on the winding process. Because here, several hundred, often even several thousand or ten thousand winding layers are wound on top of each other to form a wound roll, so that the tolerances always add up.
The winding roll 9 thus assumes under previous conditions a more or less pronounced non-circular shape, the degree of out-of-roundness over the CD course more or less varies and their amount changes with each wrapping, thereby ultimately the winding assembly 2 in its operation is disturbed sensitively.
It comes to local contact losses and as a result of the periodic excitations between winding roller 9 and winding rollers (here so support rollers 14 and support roller 3) to vibrations.

In order to avoid or at least reduce their number and / or intensity of these contact losses and sources of vibration, the roll-cutting device 1 according to the invention has a winding-hardness-generating device 15 which is arranged shortly before the first support roller 14. In the case shown, the distance of the winding hardness generating device 15 to the nip 11 between the first support roller 14 and the CD rollers 9 arranged side by side is slightly more than half the circumference of the first support roller, and is in the range between 600 mm and 850 mm. It is according to the FIG. 2 or 3 formed and has a Bahnauslenkungseinrichtung 16, which in the case of in FIG. 2 shown constructive solution of several, arranged in CD next to each other, roller segments 20 consists. Such a sectioned embodiment of a winding hardness generating device 15 according to the invention is greatly simplified in FIG. 1a shown in three-dimensional view. The individual roller segments 20 are after FIG. 2 arranged on spindles 21 which have a self-locking thread and have a common drive for rapid adjustment, to which the individual spindles 21 via coupling elements 22 on or disengaged. The common drive, for example an electric motor, is connected to a belt drive, for example a flat wedge or toothed belt, which rotates around the spindles 21 on both sides. In the illustrated preferred embodiment, two superimposed, opposing V-belts 23 are selected. Depending on which of the two V-belts 23 the coupling element 22 of the respective spindle 21 of the roller segment 20 to be actuated couples, the respective roller segment 20 is extended or lowered in the z-direction.

In FIG. 3 a further preferred embodiment of a web deflection device 16 of a winding hardness generating device 15 is also shown in a side view. In this case, the paper web M is stretched over a peripheral portion of the -in the image plane single visible- roller segment 20. It goes without saying that further roll segments 20 lie exactly behind it.
As well as for those in the Figures 2 . 4 and 5 described embodiments, it is for the function, but at least for the efficiency of the winding hardness generating device 15 of great importance that the Bahnauslenkungseinrichtung 16 is designed and aligned in their mobility, that the vertices of the end faces of the respective, with the paper web M or with the individual sub-webs , come in Wirkkontakt passing roller segments 20 as exactly as possible parallel in their career (s).
This prevents side run-off of the paper web (s) and associated stress reduction. Equally important here is the prevention of a sideways running of the individual partial webs running side by side at high speed in order to reliably prevent collisions and consequent quality losses or even disturbances. Furthermore, a clean alignment of the respective partial web M 'with the winding tube 10 assigned to it remains ensured.
The roller segments 20 are for this purpose according to the embodiment shown here, as shown on the visible roller segment 20, arranged on support bearings 24, the connecting element 25 is formed in the present case as a rotatable wheel. However, this may be other structurally meaningful molded parts. Also, a connection element 25 is not necessary in every possible embodiment of the web deflection device 16. However, the design as a rotatable wheel has advantages when the connection element 25 is in operative connection with an adjusting device 26, which, as shown, is designed as an eccentric and has a curved path 27, on which the connecting element 25 is supported. Alternatively, a connecting element would be conceivable that has a concave or simply straight effective surface to the eccentric out.
The adjusting device 26, that is to say here the eccentric, is detachably connected via a coupling 28 to the axis 29 of a drive 30 pointing in the transverse direction (Y direction) of the paper web M. In the engaged state, as shown, the eccentric sits so rotationally fixed on the axis 29. The eccentric cam shown has two vertices (S), which are seen from the center of the axis 29, on the next and far farthest point on the curved path 27. If the rotation is the same, the deflection increases from one to the other vertex (S), and then decreases again.
A vertex (S) undergoes a deflection from the vertical, which can be interpreted as a phase angle (α).
The height deflection (Z direction) of the support bearing 24 then depends on the phase angle (α) and the formation of the curved path 27.
The height deflection (Z direction) of the roller segment 20 dipping into the plane of movement of the moving paper web M is detected by a position detection device 31 and transmitted to the control and / or regulating device 19. This can for example be done wirelessly.
With the two in the Figures 2 and 3 illustrated embodiments, it is very possible to increase the amount present in the paper web tension or strain and thus to influence the winding hardness or the winding hardness profile. By a corresponding adjustment of the voltage surcharge, it is also possible to influence the diameter increase DZ of the wound roll 9 to be treated, that is, over selectable periods in more or to a lesser degree. In this way, the operator of a roll cutting device 1 according to the invention has an outstanding means for equalizing the diameter D of winding rolls 9 which form in the winding arrangement 2 next to one another. As a result, contact losses within the winding assembly 2, ie in particular between the winding rollers involved, here the two support rollers 14 and the one or more trained support roller 3 and the forming reels 9 can be reduced and avoided in consequence of vibration conditions or kept within manageable limits.

In the FIG. 4 illustrated embodiment differs from the two examples described above only in that it has a timing device 32. In this context, the embodiment shown here is also equipped with a direct-acting linear drive 33 to be able to implement rapid, preferably high-frequency, up and down movements (Z direction) accordingly. Depending on the types of paper to be processed and the forming at different times of the winding process natural frequencies of the winding assembly 2 is either, as shown, its binding behavior very directly acting electromechanical or electromagnetic linear drive, or a, with a certain damping effect tainted fluid operated linear drive - in particular in the form of, preferably double-acting, hydraulic or pneumatic cylinder - selected.

In FIG. 5 Further design features of the winding hardness generating device 15 are shown according to some subclaims, which in the combination presented here, but also individually or in other combinations can be selected.
It is striking here, first of all, that the winding hardness generating device 15 comprises a plurality of successively connected web deflection devices 16. The two outer Bahnauslenkungseinrichtungen are arranged to be movable in the x direction and can preferably be positioned via a drive along a guide 34. Thus, in addition to the amount of tension to be applied, the duration of action on the moving paper web M is adjustable and preferably adjustable during operation by the path to be laid back by it within the effective range of the winding hardness generating device 15.
Furthermore, a device 35 for air conditioning and a device for moisture control 36 are shown, by means of which in particular the material web surface MO can be acted upon and whose advantages have already been explained in the descriptive part of the present application.

In FIG. 6 a winding hardness generating device 15 is shown, which comprises a nip generator 17. The nip producing device 17 also consists of roller segments 37 arranged one after the other in the image depth corresponding to the Y direction, of which only a single one is visible in the illustrated side view. The individual roller segments 37 are adjustable via adjusting devices 38 against a counter-roller, which is formed here by the first carrier roller 14. In addition to once to be determined influencing parameters, such as diameter of the roller segments 37 and their surface texture, is adjustable by the adjustable, in particular during operation, contact pressure p of the roller segments 37th given a variable influencing variable, by means of which in the paper web M or the respective partial web M 'generated voltage relationship or increase in strain can be determined. The illustrated arrangement of the winding hardness generating device 15 is particularly effective because its Niperzeugungseinrichtung 17 is in operative connection with a support roller 14 and the distance up to the already in connection with the embodiment according to FIG. 2 with reference to FIG. 1 described first Wickelnip 11 is very small. Retardation processes are practically excluded here, also a relaxation takes place in only insignificant extent. The efficiency is correspondingly high, which is why the amount of voltage to be applied can be kept low. However, this arrangement is due to the indirect contact with the first support roller 14, the effects of possibly not completely to be prevented Unrundheitsbildungen the bobbins 9 and vibrations in the winding assembly 2 exposed more directly and therefore can not be used on a case by case basis.
On the other hand, it is advantageous again that a device designed in this way according to the invention at the same time prevents or at least greatly reduces the air intake between the individual winding layers and thus additionally contributes to the improvement of the winding quality.

In FIG. 7 is a modified embodiment of a device according to the FIG. 6 represented, wherein the Niperzeugungseinrichtung 17 is here also divided into individual segments in the Y direction, but in each case comprises at least three roller segments 37, 39, 40 circulating belt 41. In each case, a roller segment 37 is mounted stationary and only the contact pressure p on or adjustable. The others Roller segments 39, 40, however, are arranged to be movable, so that the nip length resulting in operative connection with the support roller 14 is variable, wherein one of the roller elements 39 regulates the contact pressure p and the at least one further roller element 40 controls the web tension of the circulating belt 41.

At all in the FIGS. 2 to 7 illustrated embodiments, it is also conceivable that the individual roller segments are arranged displaceably in the Y direction to allow adaptation to different patterns. Such displacement is by the guides 42 in FIG. 2 and FIG. 6 shown.
Also, the widths of the roll segments are uniform or different selectable and are in preferred ranges between 100 mm and 450 mm, but can also reach widths of 800mm or even about 1000 mm.

In FIG. 9 a winding device is shown which has no cutting section, that is suitable for web-width winding. As illustrated, this can be a take-up device at the end of a paper machine, which then preferably has a changing device which allows a continuous winding process.

However, a winding device for producing sheet-wide wound rolls may also be a rewinder or so-called doctor roller in which a finite section of a paper web M already wound on a master roll 5 is wound on a new winding core to remove defects.

The provision of a winding hardness generating device 15 according to the invention within a roll winding device without a cutting section offers in principle the same advantages as in the roll cutting devices described in connection with the above-mentioned exemplary embodiments. However, their effects will be slightly lower because the material bonds in CD juxtaposed web areas are not interrupted by separation (slitting).

In the FIGS. 1 and 9 sensors 18 are shown, which serve for the detection of measurement data in the field of winding. For example, the sensors can be operatively connected to the bearings (see FIG FIG. 1 ) at least one winding roller (vg. 14 and 3 in FIG. 1 or 43 in FIG. 9 ) and be suitable for determining vibrations. For this purpose, they may be suitable in particular for determining amplitudes and / or frequencies of oscillating components of the winding arrangement, that is to say in particular of the winding rollers (14, 3 or 43) and of the forming winding rollers 9 but also of other components of the roll winding device 1 which are involved in this context.

In other cases, it is conceivable that the diameter increase DZ of the one or more winding rollers 9 is measured. In this case, a plurality of measuring points distributed over the Y direction are preferred. But very particularly preferred is a continuous detection over the entire winding width. This can be formed, for example, contactlessly by means of an optical or acoustic detection device, that is, for example, a laser or an ultrasound transmitting and receiving unit may be realized in a line across the entire width (Y-direction) or traversing above.

A mechanical detection device for monitoring the diameter increase DZ of the individual winding rollers 9, for example, in connection with which FIG. 1 described individual segments of a support roller 3 are in communication, if these segments are arranged to maintain contact with the forming in the winding process, arranged next to each other in the winding bed 2a, individual winding rollers 9 movable on a common cross member 3a.
The measured data thus obtained are fed to a control and / or regulating unit, by means of which the respective winding hardness generating device 15 can be acted upon and which can form a structural unit with the illustrated control and / or regulating unit 19 or at least can be in operative connection therewith.

Such a control and / or regulating unit 19 can also become active on the basis of measurement data which have already been raised in paper web production. For this purpose, it must then have a feed-forward control unit.

From the illustrated embodiments may be departed from in many ways, without departing from the spirit of the invention.

LIST OF REFERENCE NUMBERS

1

Reel winding device

2

winding arrangement

2a

winding bed

3

pressure roller

3a

traverse

4

unwinding

5

motherhood

6

slitting section

7a

upper blade

7b

lower blade

8th

Broad-drawing device

9

reel

10

mandrel

11

Nip (first wrap nip)

12

Nip (winding nip)

13

Axle for carrier roll

14

king roll

15

Winding hardness generator

16

Bahnauslenkungseinrichtung

17

Niperzeugungseinrichtung

18

sensor

19

Control unit

20

roller segment

21

spindle

22

coupling member

23

Belt drive (V-belt)

24

support bearings

25

connecting element

26

adjustment

27

cam track

28

clutch

29

axis

30

drive

31

Position detection device

32

timing device

33

linear actuator

34

guide

35

air conditioning unit

36

Wicking device

37

roller segment

38

adjustment

39

roller segment

40

roller segment

41

tape

42

guide

43

winding roller

44

idler pulley

D

diameter

DZ

Diameterincreasing

M

Material web (paper web)

M '

part web

NOT A WORD

Surface of the material web

P

Pressure (contact pressure)

x

x-direction (MD)

y

y-direction (CD)

z

z-direction

Claims (17)

Roll winding device (1) for winding a material web, in particular a paper or board web (M), onto at least one winding core, preferably a winding tube (10), to a winding roll (3), at least one roll (14, 43) is present,
characterized in that
the roll winding device (1) comprises a winding hardness generating device (15) which is free of contact with the at least one winding roll (9). Roll winding device (1) according to the preceding claim,
characterized in that
the tension or elongation generated in the material web (M) by means of the winding hardness generating device (15) is modifiable, preferably adjustable, particularly preferably controllable or controllable. Roller winding device (1) according to one of the preceding claims,
characterized in that
the at least one winding hardness generating device (15) is arranged immediately before the first nip (11) formed by the at least one roller (14, 3, 43) and the at least one winding roller (9). Roller winding device (1) according to one of the preceding claims,
characterized in that
the winding hardness generating device (15) is sectioned in CD into sections, or that a plurality of winding hardness generating devices (15) are arranged side by side in CD. Roller winding device (1) according to one of the preceding claims,
characterized in that
the winding hardness generating device (15) is controllable and / or controllable on the basis of measurement data which are determined before the material web (M) enters the roll winding device (1), ie in particular in a material web production machine, for example a paper machine. Roller winding device (1) according to one of the preceding claims,
characterized in that
the winding hardness generating means (15) on the basis of measurement data, in the roll winding device (1), in particular at least one wound roll (9) to be generated and / or on at least one roller (14, 3, 43) are determined, control and / or is controllable. Roller winding device (1) according to one of the preceding claims,
characterized in that
the roll winding device (1) has a longitudinal cutting edge (6). Roller winding device (1) according to one of the preceding claims,
characterized in that
the winding hardness generating device (15) comprises a web deflection device (16) by means of which the material web (M) is stretchable such that at least part of the material web elongation can be preserved in the winding roll (9) to be produced. Roller winding device (1) according to one of the preceding claims,
characterized in that
the winding hardness generating device (15) comprises a nip generating device (17) by means of which the material web (M) is stretchable such that at least part of the material web elongation can be preserved in the winding roll (9) to be produced. Roller winding device (1) according to one of the preceding claims,
characterized in that
the winding hardness generating device (15) comprises a device (35) by means of which at least the surface (MO) of the material web (M) can be heated or cooled. Roller winding device (1) according to one of the preceding claims,
characterized in that
the winding hardness generating device (15) comprises a device (36) by means of which at least the surface (MO) of the material web (M) can be exposed to moisture. Roller winding device (1) according to one of the preceding claims,
characterized in that
the winding hardness generating device (15) is clockable. Roller winding device (1) according to one of the preceding claims,
characterized in that
in that the contact time for generating the tension or elongation that can be introduced into the material web (M) by the winding hardness generating device (15) is modifiable, preferably adjustable, particularly preferably controllable or controllable. A method for winding a material web, in particular a paper or board web (M), on at least one winding core, preferably a winding tube (10), to a winding roll (9), by means of a roll winding device (1), the at least one roller (14, 3 , 43), which bears against the at least one winding roll (9) during a winding process and is influenced by means of a tension or elongation prevailing in the material web (M),
characterized in that
the material web (M) during at least a temporal portion of the winding process by means of a Winding hardness generating device (15) is treated, which influences the material web (M) present stress or strain for generating winding hardness, in particular increased, and the winding hardness generating means (15) free of contact with the at least one, in the winding process with an increase in diameter ( DZ) forming winding roll (9) is held. Method according to the preceding claim,
characterized in that
Part webs (M ') produced by a longitudinal cutting section (6) are treated individually by means of a winding hardness generating device (15) sectioned in CD sections (20') or in CD several winding hardness generating devices (15) arranged side by side. Method according to one of claims 14 or 15,
characterized in that
the diameter increase (DZ) of the at least one winding roll (9) forming in the winding process is influenced by means of the winding hardness generating device (15). Method according to one of claims 15 or 16,
characterized in that
with the aid of the winding hardness generating device (15), the diameter increase (DZ) from winding rolls (9) produced by partial webs (M ') is made uniform within a roll throw.

Images