EP0791549B1 - Method and device for winding a longitudinally cut web of material - Google Patents

Abstract

The winding machine has three rollers (5,9',9") forming a bed on which lengths of material paper is wound into two separate rolls (7a,7b). A longitudinal seal (6',68) is inserted from below into the slot between the two support rollers. A removable end seal (34) covering the gap between the winding-roller and the mantle of the respective support-roller is positioned at the end of each winding roller. The resulting sealed cavity is connected to a supply of compressed air to form an air cushion.

Description

The invention relates to a method for winding a slit material web, e.g. Paper web, with the features of the preamble of claim 1, wherein the winding rolls arising from the partial webs by means of two winding beds formed from winding support rollers are supported. The invention also relates to a device for Performing this method with the features of the preamble of claim 6; this device is preferred designed as a three-roll slitter. In theory, you could also use the two changing beds mentioned with the help of four winding support rollers.

The state of the art is, for example, on DE-PS 35 41 906 according to the preamble of claims 1 and 6, wherein a three-roll slitter is described. The three winding support rollers form two winding beds, so that the partial webs created after the longitudinal cutting partly in one and partly in the other changing bed for winding rolls can be wound up. Every single one The resulting winding roll is created with the help of two Guided trestles. Each winding block has a vertically movable one Sleeve guide, in which a clamping head rotatably mounted is. On the two end faces of the resulting winding roll engage the two clamping heads a little in the winding tube on. This construction allows that using the vertical movable sleeve guide the weight of the resulting Winding roll is counteracted. In other words: it finds partial weight relief of the winding roll takes place, so that they no longer carry the full weight on the winding support rollers lies on. This is an attempt to counter the danger that the material web is damaged by the increasing Winding reel diameters are constantly increasing Compressive stress that the web experiences at the points where the winding roll rests on the support rollers.

So this method of weight relief allows winding rolls with relatively large diameters like this e.g. is required by the paper processing industry.

However, this well-known method of weight relief results in generally only satisfactory results if the Material web cut into relatively narrow partial webs and if accordingly relatively narrow winding rolls arise. If, however, at least one winding roll from a relatively wide partial web is formed, so the described effect Weight relief essentially only on the two End faces of the winding roll. In other words, it exists the tendency that the winding roll is under its own weight deflects. This has the consequence that the Line force in the middle of the winding roll is much larger than in the two peripheral zones. So there is in the middle area the winding roll in turn the danger that the material web is damaged.

With two-roll winding machines, it is known to be the dead weight to counteract the winding roll with a compressed air cushion. As is well known, the winding rolls lie close together tight on a single changing bed. This can cause a the only pressure pad that supports the winding rolls limited to the outside with relatively simple means be (see DE 42 04 198). A single-roll winding machine is also known, where (without changing beds) several of each other insulated winding rolls on a single central roller are formed, each winding roll by two winding blocks is led. Compressed air cushions are provided to relieve weight. (see DE 42 01 815 A1 and DE 42 19 415 A1). This Known methods are based on a three-roll winding machine not transferable.

DE 1 047 001 B shows a device for relieving pressure the dead weight of winding rolls lying on support rollers from paper, cardboard or similar material webs. Here will in a single winding bed, which is formed by two carrier rollers compressed air is blown in from below, the blow box is simultaneously designed as a longitudinal sealing element. For the A swiveling end sealing element is provided on the end faces, which is attached to a longer lever that is outside the support rollers are rotatably mounted.

DE 41 10 047 A1 describes a carrier roller winding machine with one formed by two support rollers Changing bed, which is sealed down by a longitudinal sealing element is. This longitudinal sealing element is arranged on a lever, which can be pivoted around an axis outside the support rollers is removed, for example, in the event of a paper jam to be able to. End face sealing elements are also provided, which are arranged on levers, each about the axes a support roller are pivotable. These face sealing elements are axially movable on guides and with the help of a controllable pneumatic piston-cylinder unit against the Face of the outer winding roll can be pressed on.

DE 94 14 449 U1 shows a winding machine with a single winding bed made up of two support rollers is. One of the two support rollers has an elastic cover on. There is a blow box between the two support rollers from below insertable. There is a on the front of the winding roll End sealing element arranged.

US 3,515,183 shows a winding machine with two Carrier rollers that form a changing bed. The support rollers point each have a perforated jacket. Inside each roller a blow box is arranged, the winding roll in the area supports their edition nips.

The invention has for its object the above Method and the associated device therefor to develop that despite that - on two changing beds - Insulated emergence of the winding rolls counteracted their own weight by a compressed air cushion can be and that furthermore when removing the sealing elements a collision with the support rollers or winding frame is avoided.

This task is accomplished according to the independent main claims in principle solved as follows: Starting from the beginning The method described is used in at least one of the two Changing beds below any number (preferably only the particularly wide) winding rolls each have a compressed air cushion educated. All of these compressed air cushions are limited at the bottom by inserting a longitudinal sealing element in the gap existing between the two winding support rollers. At the same time, in the area of each end face of the concerned The single compressed air cushion by attaching two End sealing elements limited, which are moved along a guide inclined relative to the winding axis when removed from the respective end of the winding roll. The number and position of the end sealing elements to the number and width of the supports Winding rolls are adjusted. The one to carry out device features necessary for this method are shown in the independent claim 6 indicated.

Another aspect of the invention relates to the problem of Compressed air supply to the various, isolated from each other Compressed air cushion. In principle, the single changing bed every single compressed air cushion compressed air via an in Sectioned pressure chamber fed. The hyperbaric chamber preferably extends over the entire length the winding support rollers, the number of each required Sections and the length of each section to the respective existing needs is adjusted.

The pressure chamber described above, divided into sections is preferably stationary inside one of the two Winding support rollers arranged, the roller shell of this Winding roller is perforated. Different types of one such perforated winding support roller are in parallel Patent application EP 0 791 550 A2.

The above-mentioned pressure chamber divided into sections can however, can also be arranged below the two support rollers and a structural unit with the longitudinal sealing element located there form.

Another possibility of supplying compressed air would also be conceivable to the individual compressed air cushions: within one of the two Winding carrier rolls could extend over the entire roll length extending uniform pressure chamber are provided, only certain, according to the partial web widths of the winding rolls dimensioned sections of the roll shell perforated are. However, this method does not allow the subsequent Adapt the sections to a changed number of Winding rolls and changing their width.

For the different winding rolls on one of the two Changing beds are only one continuous Longitudinal sealing element required that extends over the entire Length of the support rollers extends. However, there is a difficulty in that two for each winding roll to be supported End sealing elements are required and that these end sealing elements (as known per se with two-roll winding machines) for winding each new winding roll from its working position must be removed. This is necessary because on Start of each winding process for each new winding roll Winding core or a winding tube by means of the already mentioned Guide device inserted into the bottom of the changing bed must be and then gradually according to the growth of the winding roll diameter moves upwards. First if the winding roll has a certain (approximately medium) Has reached diameter, the end sealing elements in their Work position. Only from this point on is the construction of a compressed air cushion possible; before that is not because of the still low roll weight necessary.

Another aspect of the invention relates to the creation of Movement mechanisms that automatically move back and forth of the two end sealing elements on the relevant, to be relieved Allow winding roll. Starting point for one related task solution is the subject of the already mentioned DE 35 41 906 C1. From this document it is known in the field one on each of the two faces of each winding roll To provide winding block.

All of these trestles are hung on a side member, the one above the winding rollers parallel to the central winding support roller runs. Each of the winding blocks extends from this side member down towards the one in question Changing bed; it has e.g. vertical guide rail on, to guide one of the above-mentioned guide elements for the Winding core or the winding tube is used.

It has now been found that on each of the two winding blocks one A swiveling support arm can be stored in the winding roll about an axis of rotation approximately parallel to the support roller axes is pivotable and at its outer end one of the end sealing elements wearing. However, care must now be taken that the end sealing element when swiveling back and forth with neither Winding support rollers still collided with the winding frame. To this For example, the following can be provided: a guide rod is provided at the outer end of the support arm, on which the end sealing element from its working position - close on the end of the winding roll - approximately parallel to it Axis can be removed from the winding roll. The axis of the The guide rod is inclined with respect to the winding roller axis so that the end sealing element when removed from the Front side of the winding roll also from the support rollers away. In addition, a lower part of each end sealing element be foldable so that when swiveling up Avoid colliding with the adjacent outer winding roller becomes. A drive for the pivoting process is preferred housed inside the relevant trestle.

The construction of a movement mechanism just described is one of several possible options. It is special suitable for particularly confined spaces. This is e.g. then the case when two in a changing bed adjacent winding rolls, between which only a small one Distance exists, relieved by means of a compressed air cushion should be. In this case it is necessary to the movement mechanisms for a relatively narrow space to accommodate two end sealing elements. With less cramped Space will be provided for a simplified design can.

For example, you can on at least one of the winding blocks instead of a swiveling support arm an immobile one Attach the support arm, which in turn has one at its free end who carries end sealing elements. This is again as above described, relative to the support arm inclined to the winding roller axis slidable.

An embodiment of the invention is described below of the drawings.

Figure 1 shows schematically a three-roll winding machine.

Figure 2 is an enlarged view of the area above the two changing beds shown in Figure 1 Machine; it is a section along the line II-II of the figure 3rd

Figure 3 is a section along the line III-III of the figure 2nd

Figure 4 is a partial view in the direction of arrow IV of Figure 2.

FIG. 5 shows a construction that differs from FIGS. 1-4 one sectioned below a wrap bed Hyperbaric chamber.

The winding machine shown in Figures 1-4 has one Machine frame with stands 41, which are 43 are connected (Figure 1). The trusses 43 are in turn the middle of the machine connected by a longitudinal beam 45. Three support rollers 5, 9 'and 9' 'arranged next to one another extend parallel to the longitudinal beam 45. Each of the support rollers is with provided a drive, not shown. The two outer ones Carrier rollers 9 'and 9' 'extend at the same height and have the same, but smaller diameters than the middle one Support roller 5. Two adjacent support rollers form one Changing bed.

The longitudinally cut web of material, e.g. B. paper web is running along the line P via the central support roller 5 into the machine on. At least one of the cut partial webs will rolled up on the support rollers 5 and 9 '' to form a roll 7a, while at least a second partial web over the rollers 9 'and 5 is rolled up into a roll 7b. According to a variant can also be done as follows: The lengthways cut Partial webs are already on the circumference of a web guide roller 3 separated, so that the at least one partial web, which for a winding roll 7a (or more) is determined along which dash-dotted line Pa over a further guide roller 4 and enters the machine via the support roller 9 ''. The other Partial webs run along the line as before P on the support rollers 5 and 9 'on the winding roll 7b.

FIG. 3 shows the following, among other things: Because of the alternating there are partial webs entering the two changing beds e.g. between the two winding rollers 7b, which in the create a changing bed, an axial distance which the Width of the winding roll 7a arising in the other winding bed corresponds.

Longitudinally displaceable winding blocks 47, 49 are on the longitudinal member 45 stored, which protrude down into the respective changing bed and serve to guide the winding rollers 7a, 7b on both sides. FIG. 3 shows a pair of winding stands 47 for the winding roll 7a and one winding block 49 each of two winding block pairs for the winding rolls 7b. Where the end faces of two winding rolls 7a and 7b are aligned with each other, form the two these two winding rollers 47 and 49 a unit.

Each of the winding stands 47, 49 is equipped with a lifting device 48 vertically displaceable sleeve guide 46. Each sleeve guide 46 carries an axially displaceable Clamping head 50, which in the (from a winding tube 51st formed) engages the center of the winding roll in question.

For ejecting the finished winding rolls 7a, 7b from the corresponding one The changing bed is above the middle roller 5 Ejection devices 42, 44 are provided, each with a Swivel drive 52. Furthermore, each of the outer support rollers 9 ' and 9 ″ assigned a roller lowering device 53, 54 with the finished reels from the machine be filed.

The middle support roller 5 has a (preferably according to DE-PS 3843246) perforated roller jacket and a suction connection 5a. As a result, vacuum can sometimes be generated in the interior of the support roller 5 are generated, in particular during the role change after cutting the partial webs, the new beginning of the web to hold the support roller 5.

Each of the two outer support rollers 9 'and 9' 'also has a perforated roller jacket and a stationary one inside Overpressure box 15, into which a compressed air line 28 opens. The space between the roll shell and the air box 15 is divided into sections by means of seals. Their number and size can be varied. So you can on those winding rolls 7a or 7b where it is necessary is held in order to relieve weight in the concerned Build up a compressed air cushion in the changing bed. For this are both changing beds from below using a longitudinal sealing strip 6 'sealed. This extends over the entire The length of the support rollers and is for cleaning purposes and / or removable for inserting the material web. Within each of the outer support rollers 9 'and 9' 'are on the pressure box 15 seals arranged so that below the there is a pressure zone 9a to relieve the winding roll, which are circumferentially from the narrowest point between two adjacent idlers extend to where the winding roll 7a or 7b rests on the support roller 9 'or 9' '.

To limit each side created under a winding roll Compressed air pads serve two on the front of the concerned winding roll 7a or 7b (or under the End roller elements 34 which can be inserted).

The following can also be seen from FIG. 1: If at least one of the partial webs along the line Pa to the supporting roller 9 '' runs, you can modify the pressure box 15 so that that temporarily a suction zone 9b to a vacuum source can be connected. In the middle support roller 5, if necessary, in the area of each compressed air cushion a stationary cover 5b the escape of compressed air can be avoided by the perforation. Generally is however, the perforation in the roller jacket of the support roller 5 so fine that even without such a cover a noteworthy There is no pressure loss in the compressed air cushion.

From Figures 2-4 it can still be seen how the end sealing elements 34 from the area of the relevant changing bed can remove. This is necessary because when starting up new winding rolls with the help of the tube guides 46 new winding tubes 51 must be placed in the changing beds. There where an end sealing element 34 must be provided, the relevant one Winder block 49 a support arm 60, on the free End of the end sealing element 34 is supported. So between two adjacent winding rollers 7b a relatively small distance is adjustable, the support arm 60 is about a to the winding roller axis parallel axis of rotation 61 pivotable. A swivel drive for the support arm 60 is denoted by 62.

At the outer end of the support arm 60 is a guide rod 63 intended. On this, the end sealing element 34 from its Working position (close to the front of the winding roller 7b) be removed from the winding roll. According to FIG. 4 the end sealing element 34 preferably up to behind the end face 49a of the winding block 49, that is to the dashed position shown. The axis of the guide rod 63 is approximate parallel to the winding axis; it is relative according to FIG. 4 arranged inclined to the winding axis.

As a result, the end sealing element 34 wins when removed from the Front of the winding roller 7b at the same time also a distance the support rollers 5 and 9 '. In addition, a lower part 34a of the end sealing element 34 can be folded up (see FIG. 4). All of these measures ensure that the end sealing element 34 when removing from the changing bed neither with the Carrier rollers still collided with the winding frame.

Addendum to Figures 2 and 3: Here it is assumed that the Web width B of the only partially visible winding rolls 7b is greater than the web width b of the resulting one Winding roll 7a. Therefore, only on the winding rollers 7b Devices for generating a compressed air cushion are provided. With colon - dash lines 59 are those with compressed air Sections of a stationary hyperbaric chamber (e.g. 15 in Figure 1) indicated schematically. The length of one The section is therefore usually smaller than the web width B winding roller 7b to be relieved. The stationary hyperbaric chambers themselves are omitted in Figures 2 and 3.

FIG. 5 shows a construction which differs from FIGS. 1-4 an overpressure box 65. It is below the winding support roller 9 '' pivoted about its axis of rotation and extends essentially over the entire length of the support roller 9 ''. Its interior is by means of an intermediate wall 69, which extends longitudinally through the entire hyperbaric chamber extends into a plenum 66 and divided into a nozzle chamber 67. The latter has one in the changing bed directed blowout slot and forms with the Carrier rollers 5 and 9 '' sealing gaps. The nozzle chamber thus replaces the longitudinal sealing strip 6 'shown in Figure 1. she is by means of numerous axially normal partition walls 67 in many Sections divided. A valve 70 is assigned to each section, so that each section can be optionally connected to plenum 66 is or not. This allows the compressed air supply Control where to build a cushion of compressed air below a certain winding roll 7a or 7b is needed.

Claims (12)

1. Method for winding up longitudinally slit partial webs of a web of material, preferably a paper web, in which from each partial web a winding reel (7a, 7b) is formed and in which the winding reels rest on two winding beds formed from winding support rollers (5, 9', 9"), characterised in that in each winding bed under at least one selectable winding reel (7a, 7b) a cushion of compressed air limited to this winding reel is formed, the cushion of compressed air being bounded by a longitudinal sealing member (6', 68) parallel to the winding support rollers (5, 9', 9") and insertable into the gap located between the latter and by two end sealing members (34) assigned to the ends of the winding reels which members on removal of the winding reel end in question are moved along a guide (63) inclined relative to the winding axis.
2. Method according to Claim 1, characterised in that compressed air is supplied to the compressed air cushion via a pressurised chamber (15, 65) divided into sections.
3. Method according to Claim 2, characterised in that the supply of the compressed air takes place from the interior of one of the winding support rollers (9', 9") whose outer jacket is perforated.
4. Method according to Claim 2, characterised in that the supply of the compressed air takes place via the aforesaid longitudinal sealing member (68).
5. Method according to one of Claims 1 to 4, characterised in that the end sealing members (34) are removed from the region of the winding beds for the initial winding of new winding reels (7a, 7b).
6. Winding machine for carrying out the method specified in Claim 1 having two winding beds formed from winding support rollers (5, 9', 9") to receive winding reels (7a, 7b) which are produced from longitudinally slit partial webs of a web of material, preferably a paper web, characterised by the following characteristics:

   a) in the region of each winding bed a longitudinal sealing member (6', 68) can be introduced from below into the gap located between two support rollers (5, 9', 9") ;

   b) on each of the two ends of at least a single winding reel (7a, 7b) there is a removable end sealing member (34) which forms sealing gaps with the winding reel on the one hand and with the outer jacket surfaces of the winding support rollers in question,

   c) wherein the end sealing member (34) on removal from the end of the winding reel (7a, 7b) can be moved on a guide inclined relative to the winding axis.
7. Winding machine according to Claim 6, characterised in that on the winding bed at least one of the two winding support rollers (9') possesses a perforated outer surface and in the interior has a stationary pressurised chamber (15) which can be divided into sections and can be connected to a source of compressed air.
8. Winding machine according to Claim 7, characterised in that the size of each section can be adapted to the partial web width (B) of the winding reel (7b) in question.
9. Winding machine according to Claim 6, characterised in that the longitudinal sealing member (68) forms part of a pressurised chamber (65) capable of being divided into sections, it being possible to adapt the size of each section to the partial web width (B) of the winding reel (7b) in question.
10. Winding machine according to one of Claims 6 to 9 which for each winding reel (7b) possesses two winding support frames (49) which serve to guide the winding mandrel or core (51) of the winding reel, characterised in that each winding support frame (49) has a support arm (60) on the free end of which one of the end sealing members (34) is supported, preferably displaceable at an inclination relative to the axis of rotation of the winding reel.
11. Winding machine according to Claim 10, characterised in that at least one of the support arms (60) is mounted in pivotable manner in the winding support frame (49), the pivot axis (61) running at least approximately parallel to the axis of rotation of the winding reel.
12. Winding machine according to Claim 11, characterised in that on each end sealing member (34) a part (34 a) projecting into the base of the winding bed is constructed in such a way that it can be swivelled upwards.

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