EP1176108B1 - Method and device for simultaneously winding slitted webs to partial rolls - Google Patents

Description

The invention relates to a method for simultaneous Winding of several partial webs, which consist of a material web to be cut in a winding position group arranged partial web rolls. Further concerns the invention a device for simultaneous Winding of several partial webs to partial web rolls with at least one winding position group in which several Partial web rolls are arranged.

The invention will be described below with reference to a paper web described as an example of a material web. she is but also applicable to other material webs on treated and wound up in a similar way.

Paper webs are nowadays used with relatively large widths, which can be up to 10 m, produced. Such large widths are not for most users more manageable. The paper webs are therefore in one the last manufacturing steps in narrower partial webs cut, whose width is in the range of 0.5 to 3,8 m can lie. These sublanes then become too Teilbahn- or wound rolls wound up, the one Have final diameter in the range of 0.5 to 2.5 m.

Such bobbins are then packed and to the Consumers, for example, a printer, delivered.

Since the individual partial web rolls wind partial webs, which are cut from the same material web, All partial web rolls must be made of a material web be wound at the same time. For this winding process There are a number of known winding devices and method. In one embodiment, the Teilbahnrollen in the axial direction next to each other on two or more support rollers, of which at least one driven is. Here, one of the support rollers also be replaced by a band arrangement. In another Design the sub-web rollers are centrally supported and lie with their circumference at a support or Contact roller on. Because in this winding between the individual partial web rolls in the axial direction a certain Distance must be present to make room for holder devices To make available, here are two winding position groups provided in which the individual Part track rollers are arranged on gap to each other.

After winding, the partial web rolls are ejected and packed. In most cases, it will still be there certain parameters, such as weight or diameter, detected.

WO 97/47544 A1 shows a control method during winding. On a series of juxtaposed partial web rolls rest several load rollers. Each load roller is hung on a swingarm, the on a support is attached. The carrier can help with a drive in its altitude, so its relative Position to support rollers, to be changed. On the carrier is a cylinder arranged on the swingarm acts to tighten the pinch roller on the peripheral surface of the To hold partial web rolls. A sensor is provided to continuously removing a pinch roller from the To measure wearers. This measured distance is in compared to a comparator with a setpoint. If If there is a deviation, the drive is actuated, to raise or lower the carrier.

DE 76 09 748 U1 shows a winding machine for films, having a device that the out of roundness of a Winding reel or wound on the reel spool Film surface determined directly or indirectly. you uses an optical sensor here.

FR 2 524 449 A shows a winding machine in which a Web is wound on a winding roll, the is carried by two driven carrier rollers. On the top of the winding roll loads a pressure roller their own weight, but also with the weight of their above arranged bracket. The pressure roller is with raised winding roll diameter. When lifting a tap of a potentiometer is adjusted. The voltage value tapped on the potentiometer is used a control device as an input signal. This input signal is directly proportional to the path of the pressure roller and thus the increasing winding roll diameter. The control device controls a valve so that a drive cylinder, the pressure roller in the can shift right position.

The invention is based on the object, the control options to improve when winding.

This object is achieved in a method of the aforementioned Art solved by at least one predetermined Parameters of each individual sub-train role continuously is determined, the parameters of the sub-web roles be continuously compared.

Thus one saves oneself after the winding the grasping of the predetermined data or parameters, so can the manufacturing process shorten by one measuring step. About that In addition, it is possible with this approach, so to speak a "logbook" for each individual sub-web role create, i. you can change the individual Capture parameters or data during winding. This allows it to possibly occur later Make mistakes to investigate where the Cause of such an error was or is. Possibly You can also with a slightly faulty Winding process produce partial web rolls, which are limited usable. By the continuous Acquire the data, i. at least one parameter, each sub-train role gives you the opportunity to Deviations between partial web rolls immediately too to capture. Such a deviation can for example indicate an outline of the material web. An outline is for example when winding a paper web roll most problematic if not detected in time becomes. Because paper web rolls at speeds of Wrapped well above 1000 m / min is conceivable that in such an error easily a not aufgewikkelter Material web section of considerable size can arise. This material web can then be uncontrolled Wiggle around any machine components and cause damage there. A material web break was so far only to recognize that one has measured the tension in the material web. This is but only possible if the material web a certain can travel free path. As soon as she's around a carrying drum or a backup roll is guided is this possibility is not given. If you are against it determines that the diameter of a partial web roll no longer changes while the diameter of the other sub-web roles is increased accordingly This is a clear indication of a material web break.

It is particularly preferred that the winding interrupted becomes when between data of sub-train roles Differences result that have a predetermined value exceed. Even if several partial webs from the same material web are cut, are smaller Differences practically unavoidable. This is in a paper web, for example, because the Headbox crosswise to the direction not absolutely constant can hold. Usually, the material web slightly thicker in the middle than at the edges. Accordingly, for example, the weight will and the diameter of a partial web roll coming out of Middle of the material web is cut, enlarge more as the weight of partial web rolls from the Edge. Nevertheless, one can with a certain reliability predict how big differences can be, without indicating an error. A relatively safe Indication for the existence of a mistake is above all then given if the parameters of partial web roles change while getting the same parameters from others Do not change partial web roles.

Preferably, the data is acquired only from a predetermined Diameter of the partial web rolls. The reason this is that you can change the parameters in smaller Diameters only with a relatively high effort capture can. Here it is assumed that errors, for example Web breaks, usually only from a certain Diameter occur while smaller in size Roll diameters are relatively rare.

Preferably, the diameters of the individual are used Subtrack roles as data. The diameter of the partial web rolls can be detected relatively easily, for example with a feeler roller. The effort for the Recording the data of the sub-web roles remains so small.

The object is in a device of the aforementioned Art solved by each sub-train role at least one sensor is assigned, the consecutive at least one predetermined parameter of this partial web roll determined, with the sensors with a comparator connected, the parameters of the sub-web roles continuously compares with each other and a part of a drive control device forms.

With this sensor can thus be during the winding monitor progress in building the sub-train role. This makes it possible for each partial web role Log or "logbook" to keep you from valuable Gain insight into the structure of the sub-train role can. If the comparator determines that the The diameters determined by the sensors differ greatly are or are no longer a diameter changes as the other diameters change, then obviously there is an error. The comparator can then intervene in the drive control and shut down the winding device, for example.

Preferably, the sensor is designed as a diameter sensor. The diameter of the partial web roll is a relative one easy-to-capture parameter. The diameter increase over time is at constant Wikkelgeschwindigkeit well predictable, so that deviations easily recognized by this growth.

Preferably, the sensor is with a loading roller coupled, which acts as a tracking roller. Such Loading roller is in many winding devices in any case, especially at the beginning of a Wikkelvorgangs the forming partial web role against a Support or contact roller or in the winding bed too Press, at the beginning of the winding process a high To generate winding hardness. One can now with relatively little Effort of this load role an additional function transferred, namely as a follower for a Use diameter sensor.

Preferably, the loading roller is in the axial direction divided into segments, the segments by a coupling device can be coupled and a common Have rotational drive. This can be done at the beginning the winding process, where a diameter detection not yet necessary, the load role as an additional means to use a torque in to enter the forming partial web rolls. This Further torque can increase the winding hardness be used. Once a predetermined diameter the sub-web roles is reached, this is additional Measure for influencing the winding hardness not necessary anymore. From this diameter it is also readily possible that the individual partial web rolls have different diameter. In this case, separate the individual segments in Axial direction from each other and uses these segments as Touch rollers for the diameter sensor.

Fig. 1

eine Vorrichtung zu Beginn eines Wickelvorganges von mehreren Teilbahnrollen und

Fig. 2

die Vorrichtung in einem fortgeschrittenen Stadium des Wickelvorganges

The invention will be described below with reference to a preferred embodiment in conjunction with the drawings. Herein show:

Fig. 1

a device at the beginning of a winding process of several partial web rolls and

Fig. 2

the device in an advanced stage of the winding process

Fig. 1 shows in Fig. 1a is a schematic side view and in Fig. 1b is a front view of a Rollenwikkeleinrichtung 1. The roll winding device 1 has a winding bed 2, which by two support rollers 3, 4th is formed. In the winding bed 2 are in the axial direction side by side a plurality of winding rollers 5, which in Fig. 1b are labeled 5a, 5b, 5c and 5d. The bobbins 5a-5d are due to the rotation of the support rollers 3, 4 or at least one of the two support rollers 3, 4 driven and thereby pull a non-illustrated Material web previously cut into partial webs has been on a roll core 6. The next to each other lying winding rollers 5a-5d are also called Wikkelrollenanordnung designated.

On the winding rollers 5a-5d is a support roller. 7 on. As can be seen from Fig. 1b, the platen roller 7 in the axial direction in a variety of sections 7a-7h divided. Each section 7a-7h is at two Levers 8 rotatably mounted, the lever 8 turn are suspended pivotally on a support 9. The Levers 8 are rotatable on the carrier 9 about a pivot point 10, being opposed by a positioning drive 11 the carrier 9 can be pivoted. The positioning drive 11 is here as a piston-cylinder arrangement shown. But he can also be trained differently, for example, as an electric or magnetic drive.

The carrier in turn is in the direction of a double arrow 12 with the help of a not shown Hubantriebs in the vertical direction movable, i. he can moved up and down relative to the winding rollers 5.

On the carrier 9, a holder 13 for a friction roller 14 is arranged. The friction roller is about a chain 15 or a Belt with a rotary drive 16, for example an electric motor, which is also connected to the carrier 9 is arranged.

The positioning drive 11 of each section 7a-7h the support roller is at the beginning of the winding process, as shown for example in Fig. 1, so actuated, that the individual sections 7a-7h of the platen roller 7 are pressed against the friction roller 14 and that with a force that is practically slip-free Friction engagement between the friction roller 14 and the sections 7a-7h of the platen roller 7 causes. then the carrier 9 is lowered so far that the platen roller 7 rests on the winding rollers 5 and this with a certain, specifiable and possibly also adjustable Force in the winding bed 2 presses.

With this procedure it is achieved that the Wikkelrollen 5 at the beginning of the winding process on the one hand due to the relatively high pressure and on the other hand due of the introduced via the friction roller 7 drive torque wrapped with a relatively high winding hardness can be. By reducing the pressure with increasing diameter and / or by a reduction the drive torque on the friction roller 14, the Winding hardness can be lowered with increasing diameter. With increasing diameter, the carrier 9 in Directed the arrow 12 upwards, so that the Support roller 7 always remains on the winding rollers 5.

As mentioned above, the friction roller is located 14 so at the sections 7a-7h that an almost slip-free drive of sections 7a-7h guaranteed is. But so are all sections 7a-7h the support roller 7 rotatably coupled together. It Only a single drive is necessary to all To drive sections 7a-7h of the platen roller 7.

2a now shows the device 1 at a time, where the winding has progressed further. Of the Diameter of the winding rollers 5 has increased. Accordingly, the carrier 9 has moved further upwards Service. The carrier 9 has a transmitter 17 for a sensor 18. If the encoder 17 in accordance with the sensor 18 is, as in Fig. 2a by way of example represented, then the winding rollers 5 a Diameter at which an additional drive torque over the platen roller 7 is no longer required. As can be seen from Fig. 2b, have the bobbins 5a-5d at this time also different diameters, the differences here are exaggeratedly big are shown.

So as soon as this diameter is reached, the Positioning drive 11 is actuated and the lever 8 in a clockwise direction pivoted about the pivot point 10, so that the individual sections 7a-7h of the platen roller 7 of the Friction roller 14 free, so no longer driven become. At the same time they will be with a corresponding greater force against the circumference of the bobbins 5 pressed. The pivoting movement of the lever 8 can in this case be synchronized with a lifting movement of the Carrier 9.

When the portions 7a-7h of the platen roller 7 of the Friction roller 14 are lifted, then the clutch between the individual sections 7a-7h solved. At the same time the drive stops. The support roller 7 or their sections 7a-7h then serve only to with the help of a contact pressure the winding hardness of Wikkelrollen 5a-5d to control. This can be done with the help the platen roller 7 exerted pressure in the course of further Winding process can still be reduced, because the increasing Dead weight of the bobbins 5 to a corresponding Increase the bearing pressures on the support rollers 3, 4 leads.

As can be seen from Fig. 2b, the sections 7b, 7d, 7f of the support roller 7 of the winding rollers. 5 lifted off because otherwise on two bobbins 5a, 5b and 5b, 5c and 5c, 5d would act simultaneously, although these bobbins have different diameters exhibit.

The platen roller 7, i. the individual sections 7a-7h, are provided with a diameter sensor 40. Out For clarity, in Fig. 1b, each sensor is only represented by its signal line 40a-40h. In Fig. 1a, the sensor 40 is shown schematically. He points an encoder 41 which is connected to the center of the platen roller 7 is connected. This center of the platen roller 7 is essentially always above the Center of the winding roll 5, so that the position of the Center point of the platen roller 7 a clear information represents over the diameter of the winding roll 5. The encoder 41 cooperates with a receiver 42. For example, the encoder 41 a tap a potentiometer, whose trace then the Transducer 42 forms. But it is also possible that the Encoder 41 is formed by a light beam, the on a photosensitive surface 42 with photosensors meets. Such position sensors are known per se. So you use the platen roller 7, so to speak as a sensing roller for the sensor 40, capable of doing so is, continuously the diameter of the winding rollers 5 to determine, since on each winding roll 5a, 5b, 5c, 5d at least a portion 7a, 7c, 7e, 7g, 7h rests.

All sensors 40a-40h are equipped with an evaluation device 43 connected, among other things, a comparator contains. The evaluation device 43 now has several Tasks. For one, she is able to build the Bobbins 5a, 5b, continuously log, for example, the diameter increase over time record. Based on such a record, which makes a "logbook", it is possible later, too after winding to judge whether the winding roll 5 faultless or faulty. An error can For example, be characterized by an increase in diameter unevenly done.

The evaluation device 43 is also able to the diameter increases of each bobbins with each other to compare. This has several advantages. To the One can be irregularities in the structure better recognize, if one has the appropriate structure of several similarly wound bobbins 5a-5d with each other compares. On the other hand, it is also possible determine if the diameter gains per se are strong are different. Take, for example, the diameter a winding roll 5c evenly, the diameter the winding roll 5d, however, not, then indicates this on a web break. The evaluation device 43 then engages in the drive of the support rollers 3, 4 a and put these down. This can be major damage avoid after a paper web break.

With the described procedure one creates so two advantages: firstly, a paper web break is very quickly recognized, so that consequential damage kept small can be. On the other hand it is possible, not only globally the parameters of a litter of several partial web rolls to determine, but at each winding roll certain Continuously record and log parameters.

Claims (8)

1. Method for simultaneously winding a plurality of part webs, which are cut from a material web, to form part rolls (5a - 5d) which are arranged in a winding position group, characterized in that at least one predetermined parameter of each individual part roll (5a - 5d) is determined continuously, the parameters of the part rolls (5a - 5d) being compared with one another continuously.
2. Method according to Claim 1, characterized in that the winding is interrupted when differences which exceed a predetermined value result between parameters of part rolls (5a - 5d).
3. Method according to Claim 1 or 2, characterized in that the parameters are registered only beginning at a predetermined diameter of the part rolls (5a - 5d).
4. Method according to one of Claims 1 to 3, characterized in that the diameters of the individual part rolls (5a - 5d) are used as parameters.
5. Device for simultaneously winding a plurality of part webs to form part rolls (5a - 5d), having at least one winding position group, in which a plurality of part rolls (5a - 5d) are arranged, characterized in that each part roll (5a - 5d) is assigned at least one sensor (40a - 40h) which continuously determines at least one predetermined parameter of this part roll (5a - 5d), the sensors (40a - 40h) being connected to a comparator (43), which compares the parameters of the part rolls continuously with one another and forms part of a drive control device.
6. Device according to Claim 5, characterized in that the sensor (40a - 40h) is constructed as a diameter sensor.
7. Device according to Claim 6, characterized in that the sensor (40a - 40h) is coupled to a loading roller (7a - 7h), which acts as a sensing roller.
8. Device according to Claim 7, characterized in that the loading roller (7a - 7h) is subdivided into segments in the axial direction, it being possible for the segments to be coupled by means of a coupling device and the segments having a common rotary drive.

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