FI105672B - Method and apparatus for changing rollers - Google Patents

Abstract

In a device for changing winding rollers (2) in machines for winding material webs (4), especially paper or cardboard webs, on sleeves, it is known to apply double-sided adhesive strips (31, 34) to the web (4) in order to secure the start of the web to a new sleeve and/or the end of the web to a full winding roller (3). According to the invention, the adhesive strips (31, 34) are first applied to a transfer device (transfer roller 21) displaceable against the web (4) with a weaker adhesive force than on the material web (4), and then the transfer device (transfer roller 21) is moved against the web (4) and the adhesive strips (31, 34) are transferred thereto.

Description

5, 105672

Method and apparatus for changing rolls -Förfarande och anordning för växling av rullar

The invention relates to a method of changing rolls to cores of material webs, in particular of paper or board, in winding machines according to the preamble of claim 1, and to an apparatus for carrying out the method.

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In winding machines, in order to wind material webs into rolls, machine shutdown times that are necessary for changing rolls are kept to a minimum. In this case, it must be ensured that the new start of the web resulting from the cutting is secure to the fastener of the new roll and / or that the end of the web is securely fixed to the full roll.

DE 36 11 895-A1 discloses a type method in connection with a support roll winding machine, in which the web of material 20 is first weakened before it reaches the support roll, an adhesive strip is applied to each side of the weakening, and the material webs are separated by braking roll. Due to the negative pressure, the ends of the web held on the support roller are moved to the full rolls and glued to them. The formed new web ends 25 will remain braked in this movement until after the finished rolls have been disassembled and new cores have been inserted, the brake is released and the web ends provided with adhesive strip are transported from the support roll to the cores.

DE 40 03 504-A1 discloses a support roll winding machine with a perforating device and a plurality of adhesive tape feed means for applying double-sided adhesive tapes across the working width, which release their adhesive tape in the direction of web travel. The application of the adhesive tapes 35 may thus be effected by means of a moving web.

In connection with paper or board webs, it has now been found that a uniform wider adhesive strip is required over the web width, or when the adhesive strip is applied in the direction of web travel at approximately 200 mm intervals. For large web widths (e.g., 8 m), the application of a transverse adhesive band requires a great deal of time, or, when spreading in the web direction, a large amount of adhesive band feeding means is required.

The object of the invention was to improve the type method so that only one adhesive supply means is required to apply the adhesive strips without extending the machine downtime.

This problem is solved by the features of claim 1.

According to the invention, only one adhesive supply means is needed which first places the adhesive strips on the transfer element. This can occur during the winding of the material web so that stopping times are not prolonged. If the roll change takes place in a shorter period of time than is necessary to place the adhesive strips on the transfer element, two adhesive supply lines which simultaneously spread the adhesive strips to the working width of the transfer element are sufficient.

The dependent claims include popular, particularly advantageous, embodiments of the invention:

The free-moving, moving web-based transfer roller according to claim 2, allows the adhesive strips to be positioned by the moving web.

Claim 3 includes an advantageous variant for replacing rolls with heavy paper grades, e.g. cardboard. The web is first weakened and adhesive strips are applied to each side of the weakening line. The weakening line 35 can then be moved to a position which is desirable for gluing the new top of the web to the new cores. After the web is cut, adhesive strips are present both at the end of the web - for gluing to a full 3 105672 rolls - and at the newly formed upstream end of the web - for gluing to new roll sleeves.

Claim 4 includes a particularly advantageous variant of the method of claim 3 for replacing full rolls with new roller cores in support roller winding machines having two used support rollers on which the rollers rest when rolled.

Claims 5 to 10 include preferred devices for carrying out the process of claims 1 to 4.

The drawing serves to explain the invention in a simplified manner with reference to the exemplifying embodiments.

Figures 1 and 2 are a side elevational view of an adhesive applicator according to the invention which, when used in a winding machine, sets a plurality of webs of adhesive 20 in web direction at mutual distances.

Figure 3 shows an adhesive applicator which sets a wide adhesive strip transversely to the web direction.

Figure 4 shows a paper web with parallel strips of adhesive strips facing the web.

Figure 5 shows a paper web having a wide strip of adhesive transverse to the direction of travel.

Figure 6 shows an adhesive applicator for applying one or more adhesive strips.

The support roller winding machine, shown only partially in the drawing, has two usable support rollers 1, 2 on which the rollers 3 rest during the winding. The material web 4, preferably paper or paperboard 35 divided into longitudinally separate webs, is guided from below through a gap between the support rolls 1, 2 and guided to a roll bed 5 and rolled onto successive cores. Such double-support 105672 4 la winding machines are quite well known and described, for example, in DE-OS 32 07 461, so that details will not go unless they relate to the invention.

5 The inlet-side support of the roll 1 at either end are fastened to a pivotable arm 6 which supports extending transversely over the working width above the kääntötraverssia 7. Kääntötraverssin 7 is mounted freely rotatable discharge roller 8 from the full reels 3 for pushing over the supporting roll 2. On its underside, the pivoting wire 7 10 carries a counter-holder 9 of the perforating device 10 extending over the working width and having two support surfaces 11, 12 with a groove between them. By lowering the pivoting transverse 7, the support surfaces 11, 12 can be moved against the web 4, as shown in Figure 2.

The perforating device 10 has a serrated blade 14 extending over the working width, which can be removed by the impact unit 15 from the web 4 and, as shown in Fig. 2, pressed down into the groove 4 for the perforation of the web 4. To press the web 4 during routing, there are two press members 17, 18 on the sides adjacent to the blade 20 14, resiliently attached to the blade retainer 16, which can be pressed against the support surfaces 11, 12 of the retaining clip 9.

Below the support roller 1 is arranged a device 19 for applying the adhesive. It has a transfer roller 21 extending over the working width, pivotally mounted on the pivoting arms 20 by means of an actuator, which can be moved from below to the web 4 in an area where it rests on the support roll 1. The surface of the transfer roll 21 is it has less adhesion than the web 4.

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1-3, an adhesive supply means 22 is provided below the transfer roller 21, which is mounted on guide rails 23 movably across the working width, i.e. 35 parallel to the axis of the support roller. In the embodiments shown in Figures 1 and 2, the adhesive tape 24 is guided in the direction of travel of the web 4. To this end, a storage roll 26 for adhesive tape 24 having a double-sided adhesive adhesive to the backing tape 27 is freely rotatably mounted on a movable carriage 5 105672. Here, conventional adhesive tapes can be used in the paper industry whose adhesive layer very easily comes off the support strip 27. The adhesive strip 24 is guided up in the carriage 25 and upstream of the web 4 up to the adhesive strip-wide press roll 28 which rotates it down To apply adhesive strips to the transfer roller 21, the press roller 10 may be pivoted upwardly against the transfer roller 21 by its piston-cylinder assembly 30 when in its lowered position.

When shorter times are required for applying the adhesive strips to the transfer roller 21, e.g. due to the shorter roll change times 15, two or more adhesive tape feed means are provided at the width of the machine which simultaneously distribute.

Fig. 1 shows a support roller winding machine during winding: the perforating device 10 and its locking clip 9 are located at a distance from the web 4 20 which is not disturbing. The transfer roll 21 is lowered so that it is also located at a distance from the web 4. In this position, a plurality of parallel adhesive strips 31 are placed on its surface in the direction of travel of the web 4. For this purpose, the press roll 28 surrounded by the adhesive tape 24 pivots from the bottom 25 against the transfer roll 21. By rotating the transfer roller 21, the adhesive tape 24 is wound from the storage roller 26 and the transfer roller 21 passes the adhesive strip 31. When the transfer roller 21 has adhesive strips of the desired length, the press roll 28 is lowered to release the adhesive layer. Then, the carriage 25 traverses transversely to the next transfer of adhesive band with respect to the web direction • ... · ___ T - ^ __ ...

* drive. At Senna, the transfer roller 21 is rotated back to its receiving position so that the received adhesive strips 31 are aligned. Depending on the width of the web 4, a plurality of 105672 6 adhesive strips 31 which are parallel and transverse to the direction of travel of the web 4 are then deposited on the transfer roll 21, preferably at intervals of about 200 mm. It is likewise possible that the positions of the adhesive strips 31 are adjusted depending on the positions of the longitudinal knives such that the adhesive strips 31 are evenly distributed on the various webs.

When the roll 3 has reached a predetermined web length or a predetermined diameter, the support roller winding machine is stopped. The web 4 stops tight due to the braking force applied to the unrolled unwinding device. Subsequently, the pivoting transversal 7 is moved downwardly so that the support surfaces 11, 12 of the counter bracket 9 rest on the web 4, and the web 4 is weakened by perforations. For this purpose, the separating blade 14 moves upwardly and tips through the web 4 up to the groove 15 between the support surfaces 11, 12. In the course of perforation, the web 4 is pressed between the pressing elements 17, 18 and the supporting surfaces 11, 12 and is thus held in tension. At the same time, the transfer roll 21 rotates, as shown in Fig. 2, from below toward the support roll 1 and contacts the web 4. The transfer roll 21 is then rotated 20 such that the circumferential distance between the contact line 32 of the web 4 and the center of the adhesive strips . Thereafter, the separation blade 14 with clamping elements 17, 18 is lowered and the transfer roller 21 is engaged for free travel. The support roll 25 1 is then actuated with a smaller web tension so that the contacting transfer roll 21 rotates. In this case, the adhesive strips 31 are pressed against the contact line 32 against the web 4, whereby they release from the transfer roll 21 and engage the web 4, since the adhesion to the web 4 is stronger than the transfer roll 21. The perforation line 33 .. whereby the adhesive strips 31 are located on either side of the perforation line 33 on the web 4 (Fig. 4).

35 After the adhesive strips 31 have been released to the web 4, the transfer roller 21 is lowered again and in this position can re-receive the adhesive strips for the next roll change.

7 105672

The web 4 is moved forward again until the weakened point of the web (perforation line 33) is located with the adhesive strip 31, in the roll bed 5 above the gap between the two support rolls 1,2.

Here, the web 4 is stopped, and the brake 5 on the discharge winder is locked to resist maximum force. The rolls 3 are then lifted slightly by the ejection roller 8 from the surrounded support roller 1 and rotated by the support roller 2. The web 4 is then cut along the perforation line 33 so that both the outgoing web end and the newly formed web 10 end have adhesive strips 31. the upstream end is held by a support roll 1, which can be effected, for example, by suction under reduced pressure or by mechanical holding elements. The full rolls 3 are further rotated until the end of the web provided with adhesive strips 31 has passed past the contact line of the support roll 1 or up to the ejection roll 8 to glue the end of the web to the full roll 3. The full rolls 3 are pushed set a new set of cores. When a non-shown pressure roller is placed, the support rolls 20, 2 are again actuated to bring the new ends of the web provided with adhesive strips 31 into contact with the sleeves. The adhesive bond of the web 4 to the cores is formed when the initial end of the web with the adhesive strip 31 has passed through the gap between the cores and the support roll 1. The support roller winding machine can then be accelerated to maximum angular speed.

In the embodiment of Figure 3, a wider, mutually adhesive adhesive strip 34 is applied across the direction of travel of the web 4, i.e. parallel to the axis of the transfer roll 21 (Figure 5). For this purpose, the carriage 25 of the adhesive tape feeding means 22 is bearable .. movable across the working width, so that the axes of the press roll 28 and • __ 'storage roll 26 extend perpendicular to the transfer roll 21. axis. To apply a sufficiently wide adhesive strip 34 superficially to the transfer roll 21, the press roll 28 is concave to the periphery 35 and is axially concave. This can be achieved by using so-called Diabolo rollers. The press roll 28 clamps the adhesive tape 24 - as described in the above embodiment 8 105672 - against the transfer roll 21 while the carriage is moved over the entire working width. The press roll 28 is then lowered to break the adhesive layer of the adhesive tape 24. In order to expedite the application of the adhesive tape to the transfer roller 21, an adhesive tape supply means 22 may be provided on each side of the machine, which will then apply the adhesive strip 34 to the other half of the transfer roller 21. The transfer of the adhesive strip 34 to the web 4 takes place as described above by pressing the transfer roll 21 against the web 4.

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Figure 6 illustrates another embodiment in which double-sided adhesive strips are formed by spraying on a transfer roll 21. To this end, one or more glue nozzles 35 are provided below the transfer roll 21, which are arranged either across the entire width of the web 15 or transversely to the web. The nozzles 35 are used to inject the transfer roller 21 with one or more adhesive strips, e.g. They are then transferred to web 4 as described above.

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Claims (10)

A method of replacing bobbin rolls in machines for bobbin winding of material webs, especially paper or cardboard webs, wherein two-sided adhesive strips (31, 34) are applied to the web of material (4) to adhere the first end of the web to a new sleeve and / or the end of the web to a full-flush bobbin (3), characterized in that the adhesive strips (31, 34) are first applied to a transfer member (21) which can be moved against the web (4) and whose surface has lower adhesion than the web (4), and then the transfer member (21) is moved toward the web (4) and transfers the adhesive strips (31, 34) to the first end or end of the web. Method according to claim 1, characterized in that the movable transfer element is a freely moving transfer roller (21) which rests on the moved web (4) and rolls the adhesive strips (31, 34) onto the web (4). «· 1 Method according to claim 1 or 2, characterized in that before a full coil coil (3) is removed, the web (4) running into the coil machine is weakened along a line of weakening or perforation line (33) extending transversely to the direction of movement, adhesive strips ( 31, 34) are applied to each side of the weakening line, the web (4) is then cut by increasing the web tension and the end of the web is attached to the full coil coil (3) and after that a new coil sleeve is inserted. - the first end of the new track is adhered to this. Method according to claim 3 for automatically replacing a full coil coil (3) with a new coil sleeve in carrier roll coil machines with two driven support rollers (1, 2) characterized in that the web (4) is deflected by a support roll (1). from below through the carrier roll slot in the roll bed (5) and the roll exchange is performed with the following steps: - the web (4) is stopped to weaken, 5. the weakening line or perforation line (33) is then transferred to the roll bed (5) and stopped there, adhesive strips (31 , 34) is applied on each side of the line of weakening during this movement, - the first end of the web to be produced again is poured constantly on the enclosed carrier roll (1), - the web (4) is then cut by rotating the full coil (3) ) against a braking force, and the end of the web is constantly stapled to the full coil (3), - the full coil (3) is then removed from the roll bed, and - after a new coil sleeve is inserted, this is stapled to the new coil. first end of the pin by rotating both carrier rolls (1, 2). Apparatus for flushing webs of material for carrying out a method according to claims 1-4, characterized by a transfer element (21) which can be moved towards the incoming web (4) for two-sided adhesive strips (31, 34), said transfer element has lower adhesion than the web (4), and by means such as adhesive tape distributor (22) or adhesive nozzles (35), for applying adhesive strips (31, 34) to the transfer element. Device according to claim 5, characterized by a transfer roller (21) which is driven and can be coupled to free operation as a transfer element. '.30 Device according to Claim 5 or 6, characterized by one or more adhesive tape distributors (22), which are supported so that they can be moved transversely to the direction of movement of the web on that side. of the transfer element or of the transfer roller (21) which deflects away from the web (4) and applies adhesive strips 35 (31, 34) transversely to or in the direction of movement of the web on the transfer element or transfer roller (21). 13 105672 Device according to claim 5 or 6, characterized by adhesive nozzles (35) for spraying adhesive strips on the transfer element. Device according to any of the preceding claims 5-8, comprising a bar or support roll (1) partially enclosed by the web (4), characterized in that the transfer element or transfer roll (21) can be pressed against the support or support roll. (1) within the area enclosed by the web (4). Device according to any of the preceding claims 5 - 9, 10, characterized in that on the inlet side, the transfer element or the transfer roller (21), a device, such as a perforating device (10), is arranged for weakening of the web. »« 4 • 9 9