EP1176108A2 - Method and device for simultaneously winding slitted webs to rolls - Google Patents

Abstract

The procedure for the simultaneous winding of several material part webs onto separate rolls entails continuously recording a predetermined parameter of each individual roll and comparing the parameters of the rolls with each other. The winding is interrupted if a predetermined value of the difference between parameters is exceeded. The diameter of the individual rolls may be used as a parameter. An Independent claim is included for a system for the simultaneous winding of part webs onto rolls in which each roll has a sensor (40) to record its diameter parameter.

Description

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

The invention is based on a paper web described as an example of a material web. she is but also applicable to other material webs based on must be handled and wound up in a similar manner.

Paper webs are nowadays with relatively large widths, which can be up to 10 m. 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, the width of which ranges from 0.5 to Can be 3.8 m. These partial webs then become Partial web or winding rolls wound up, some Have final diameters in the range of 0.5 to 2.5 m. Such winding rolls are then packed and attached to the Consumers, such as a print shop, shipped.

Since the individual partial web rolls wind up partial webs, which are cut from the same material web, all partial web rolls must be made from one material web be wrapped at the same time. For this winding process there are a number of known winding devices and - procedure. In one embodiment, the Partial web rolls in the axial direction side by side on two or more support rollers, at least one of which is driven is. Here, one of the support rollers can also be replaced by a band arrangement. In another The partial web rolls are supported centrally and lie with their extent on a support or Contact roller. Because with this winding between the individual web rolls in the axial direction a certain Clearance must exist to accommodate holder facilities There are two winding position groups available here provided in which the individual Partial web rolls are arranged to gap to each other.

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

The invention is based, the control options to improve when wrapping.

This task is carried out in a method of the aforementioned Art solved in that predetermined parameters each individual sub-web roll are recorded continuously.

This saves you having to capture the after winding predetermined data or parameters, so the manufacturing process shorten by one measuring step. About that it is also possible with this procedure, so to speak a "logbook" for each individual web roll create, i.e. one can change the individual Collect parameters or data while wrapping. This allows for those that may occur later Failed to investigate where the The cause of such an error was or lies. Possibly can also be used for a slightly faulty Produce winding of partial web rolls that are of limited use.

The parameters of the partial web rolls are preferred continuously compared with each other. Through the ongoing Collect the data, i.e. at least one parameter, of each sub-web reel you have the opportunity Deviations between partial web rolls immediately to capture. Such a deviation can, for example indicate a tear of the material web. An outline is for example when winding a paper web roll highly problematic if it is not recognized in time becomes. Since paper web rolls at speeds of it is conceivable to wind well over 1000 m / min that with such a mistake an easily unwound Material web section of considerable size can arise. This web of material can then become uncontrolled wrap around any machine components and cause damage there. A web break was previously only recognizable by the fact that has measured the tension in the material web. This is but only possible if the material web has a certain can travel free path. Once around a carrier drum or a backup roller is guided this possibility did not exist. But if you determines that the diameter of a partial web roll no longer changes while the diameter of the other partial web rolls is enlarged accordingly this is a clear indication of a web break.

It is particularly preferred that the winding is interrupted when there is data between partial web rolls Differences result in a predetermined value exceed. Even if several partial webs from the cut the same material web are smaller Differences practically unavoidable. This is because with a paper web, for example, that the Headbox transverse to the running direction is not absolutely constant can hold. The material web is usually slightly thicker in the middle than at the edges. Accordingly, for example, the weight and the diameter of a partial web roll, which from the Cut the middle of the material web, enlarge it more than the weight of partial web rolls from the Edge. Still, you can with some reliability predict how big differences can be without indicating a mistake. A relatively safe one The main indication of the existence of an error is given when the parameters of partial web rolls change while the same parameters differ from others Do not change part web rolls.

The data is preferably only acquired from a predetermined one Diameter of the partial web rolls. The reason for this is that you can change parameters for smaller ones Record diameters only with a relatively high effort can. It is assumed that errors, for example Web breaks, usually only from a certain point Diameters occur while smaller Roll diameters are relatively rare.

The diameters of the individual are preferably used Partial web rolls as data. The diameter of the partial web rolls can be recorded relatively easily, for example with a feeler roller. The effort for that Recording of the data of the partial web reels therefore remains small.

The object is achieved in a device of the type mentioned Art solved in that each sub-web role Sensor is assigned that continuously at least one predetermined parameters of this partial web roll determined.

This sensor can be used during winding monitor the progress in building the partial web roll. This makes it possible to have one for each web roll Keep a log or "log book" from which you can get valuable Gain information about the structure of the partial web role can.

The sensor is preferably designed as a diameter sensor. The diameter of the partial web roll is a relative one easy to grasp parameter. The increase in diameter over time is at constant winding speed well predictable, so deviations can easily be recognized by this increase.

The sensor is preferably provided with a load roller coupled, which acts as a sensing roller. Such Load roll is in many winding devices available anyway, especially at the beginning of a winding process the partial web roll that forms against one Back-up or contact roller or in the changing bed press to a high at the beginning of the winding process To produce winding hardness. You can now with relatively little Effort of this burden role an additional function transferred, namely it as a tactile role for one Use diameter sensor.

The loading roller is preferably in the axial direction divided into segments, the segments by a coupling device can be coupled and a common Have rotary drive. With that you can start of the winding process, where a diameter detection the stress role is not yet absolutely necessary use as an additional means to torque in enter the partial web rolls that are being formed. This further torque can increase the winding hardness be used. Once a predetermined diameter the partial web roll is reached, this is additional Measure to influence the winding hardness not necessary anymore. From this diameter it is also easily possible that the individual web rolls have different diameters. In this case, separate the individual segments into Axial direction from each other and uses these segments as Tracer rollers for the diameter sensor.

In a particularly preferred embodiment, that the sensors are connected to a comparator are part of a drive control. If the comparator finds that from the sensors determined diameters are very different or a diameter no longer changes while the other diameters change, then obviously lies an error before. The comparator can then in the drive control and the winding device for example, stop.

Fig. 1

eine Vorrichtung zu Beginn eines Wickelvorganges von mehreren Teilbahnrollen und

Fig. 2

die Vorrichtung in einem fortgeschrittenen Stadium des Wickelvorganges

The invention is described below with reference to a preferred embodiment in connection with the drawing. Show here:

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 a schematic side view in Fig. 1a and in Fig. 1b a front view of a roll winding device 1. The roll winding device 1 has a winding bed 2, which is supported by two support rollers 3, 4 is formed. In the winding bed 2 lie in the axial direction next to each other several winding rolls 5, which are shown in Fig. 1b are designated 5a, 5b, 5c and 5d. The winding rolls 5a-5d are caused by the rotation of the support rollers 3, 4 or at least one of the two support rollers 3, 4 driven and thereby pull a not shown Material web previously cut into partial webs has been on a roll core 6. The side by side lying winding rolls 5a-5d are also used as winding rolls designated.

A support roller 7 lies on the winding rollers 5a-5d on. As can be seen from Fig. 1b, the support roller 7 in the axial direction in a plurality of sections 7a-7h divided. Each section 7a-7h is on two Levers 8 rotatably mounted, the lever 8 in turn are pivotally suspended on a support 9. The Levers 8 are rotatable on the support 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 it can also be designed 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 Linear actuator movable in the vertical direction, i.e. he can can be moved up and down relative to the winding rolls 5.

A holder 13 for a friction roller 14 is arranged on the carrier 9. The friction roller is over a chain 15 or one 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, operated that the individual sections 7a-7h of the support roller 7 are pressed against the friction roller 14 with a force that is practically slip-free Frictional 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 support roller 7 rests on the winding rollers 5 and this with a certain, definable and possibly also adjustable Press force into the changing bed 2.

This procedure ensures that the winding rolls 5 on the one hand at the beginning of the winding process because of the relatively high pressure and on the other hand because of the drive torque introduced via the friction roller 7 wound with a relatively high winding hardness can be. By reducing the pressure with increasing diameter and / or by a reduction of the drive torque via the friction roller 14 can Winding hardness can be reduced with increasing diameter. With increasing diameter, the carrier 9 in Drive upwards in the direction of arrow 12, so that the Support roller 7 always remains on the winding rollers 5.

As already mentioned above, the friction roller lies 14 so on the sections 7a-7h that an almost Slip-free drive of sections 7a-7h guaranteed is. But this is also all sections 7a-7h the support roller 7 rotatably coupled together. It only one drive is required to power all To drive sections 7a-7h of the platen roller 7.

2a now shows the device 1 at a time, where the winding is more advanced. The The diameter of the winding rolls 5 has increased. Accordingly, the carrier 9 has moved upward Service. The carrier 9 has a transmitter 17 for a sensor 18. If the encoder 17 is in agreement stands with the sensor 18, as an example in FIG. 2a shown, then the winding rollers 5 have one Diameter at which an additional drive torque about the platen roller 7 is no longer required. As can be seen from Fig. 2b, the winding rolls 5a-5d also different diameters at this time, the differences here are exaggerated are shown.

As soon as this diameter is reached, the Positioning drive 11 actuated and lever 8 clockwise pivoted about the pivot point 10 so that the individual sections 7a-7h of the platen roller 7 from the Friction roller 14 come free, so no longer driven become. At the same time, however, they are used accordingly greater force against the circumference of the winding rolls 5 pressed. The pivoting movement of the lever 8 can here be synchronized with a stroke of the Carrier 9.

When the sections 7a-7h of the platen roller 7 from the Friction roller 14 are lifted off, then the clutch solved between the individual sections 7a-7h. At the same time, the drive stops. The platen roller 7 or their sections 7a-7h then only serve the winding hardness of the winding rolls with the help of a contact pressure 5a-5d to control. This can be done with the help the platen roller 7 exerted pressure in the course of the further Winding process can still be reduced because the increasing Dead weight of the winding rolls 5 to a corresponding one Increase of the contact 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 from the winding rollers 5 lifted off, because otherwise they are on two winding rollers 5a, 5b or 5b, 5c or 5c, 5d would act simultaneously, although these winding rolls have different diameters exhibit.

The platen roller 7, i.e. the individual sections 7a-7h, are provided with a diameter sensor 40. Out For the sake of clarity, each sensor is only in Fig. 1b represented by its signal line 40a-40h. In Fig. 1a, the sensor 40 is shown schematically. He points a sensor 41 on the center of the platen roller 7 is connected. This center of the platen roller 7 is essentially always above Center of the winding roller 5, so that the position of the Center of the support roller 7 clear information represents over the diameter of the winding roll 5. The transmitter 41 interacts with a receiver 42. For example, the sensor 41 can be a tap of a potentiometer, the conductor track of which then Sensor 42 forms. But it is also possible that the Encoder 41 is formed by a light beam that is on a photosensitive surface 42 with photo sensors 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, which is thus able is continuously increasing the diameter of the winding rolls 5 determine, because on each winding roll 5a, 5b, 5c, 5d at least a section 7a, 7c, 7e, 7g, 7h rests.

All sensors 40a-40h are equipped with an evaluation device 43 connected, including a comparator contains. The evaluation device 43 now has several Tasks. For one, it is able to build the To continuously record winding rolls 5a, 5b, for example the increase in diameter over time record. Based on such a record, which forms a "log book", it is possible later, too after winding to judge whether the winding roll 5 is error-free or faulty. A mistake can can be seen, for example, in that an increase in diameter done unevenly.

The evaluation device 43 is also able to the diameter increases of the individual winding rolls with each other to compare. This has several advantages. To the one is better at irregularities in the construction recognize if you have the appropriate structure of several similarly wound winding rolls 5a-5d with each other compares. On the other hand, it is also possible determine whether the diameter increases are strong in themselves are different. For example, take the diameter a winding roll 5c evenly, the diameter the winding roller 5d, however, does not indicate this is due to a web break. The evaluation device 43 then engages in the drive of the support rollers 3, 4 and shut it down. This can cause major damage avoid after a web tear.

With the described procedure you can create two advantages: on the one hand, a paper web tear becomes very great quickly recognized so that consequential damage is kept small can be. Secondly, it is not only possible global the parameters of a throw of several partial web rolls determined, but determined on each winding roll Record and log parameters continuously.

Claims (10)

Method for the simultaneous winding of several partial webs which are cut from a material web into partial web rolls, characterized in that at least one predetermined parameter of each individual partial web roll is continuously determined. Method according to Claim 1, characterized in that the parameters of the partial web rolls are continuously compared with one another. Method according to Claim 2, characterized in that the winding is interrupted if there are differences between parameters of partial web rolls which exceed a predetermined value. Method according to one of claims 1 to 3, characterized in that the parameters are only recorded from a predetermined diameter of the partial web rolls. Method according to one of claims 1 to 4, characterized in that the diameters of the individual web rolls are used as parameters. Device for the 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, characterized in that each partial web roll (5a-5d) is assigned at least one sensor (40a-40h) which continuously assigns at least one predetermined parameter to this Partial web roll (5a-5d) determined. Apparatus according to claim 6, characterized in that the sensor (40a-40h) is designed as a diameter sensor. Apparatus according to claim 7, characterized in that the sensor (40a-40h) is coupled to a loading roller (7a-7h) which acts as a sensing roller. Apparatus according to claim 8, characterized in that the loading roller (7a-7h) is divided into segments in the axial direction, the segments being able to be coupled by a coupling device and having a common rotary drive. Device according to one of claims 6-9, characterized in that the sensors (40a-40h) are connected to a comparator (43) which forms part of a drive control device.

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