EP2301871B1 - Method and device for sleeve loading in double carrier-drum winder during operation - Google Patents

Description

The invention relates to a method for winding a web on at least one sleeve lying in a winding bed formed from two support rollers, wherein the resulting winding is pressed at least in the initial phase of the winding process by a pressure roller in the winding bed and after reaching an end target diameter at least is ejected at reduced winding speed with separation of the material web from the winding bed, and the resulting by the separation new material web start is then wound on at least one new introduced into the winding bed sleeve, wherein in the limited by the two support rollers and the current winding space the at least a new sleeve, at the earliest, as soon as the geometric conditions of this space and that of the sleeve allow that.

Furthermore, the invention relates to a device for carrying out the method.

The invention will be described below with reference to a roll winding device, in particular a roll cutting device, for paper and board webs. However, it is similarly applicable to methods and apparatuses on which rolls are wound and / or cut with other webs of comparable properties.

After their production paper and board webs are wound into rolls. These rolls, also referred to as machine or master rolls, now reach widths of more than 11,000 mm and diameters of up to 4,000 mm. With such dimensions they are usually not marketable. For this purpose, they must first be converted into so-called customer or finished rolls. This is done on slitters, which consist of a settlement for the aforementioned parent rolls, a device for slitting the unwound web and len, a means for longitudinal cutting of the unwound web and a winding consist, in which the resulting individual webs are wound up into finished rolls. The customer rolls in the finished state have diameters ranging from 400 mm to 2,500 mm and widths of the order of 300 to 4,500 mm. From the mother roll, several customer roles are generated simultaneously in the slitter-cutting machines in a single operation. The term "customer roll set" is often used for the simultaneously wound single rolls. It follows from the aforementioned ratio of master roll diameter to customer roll diameter that one and the same master roll is "good" for several finished roll sets. In the case of the slitter-winder one distinguishes between two basic types, the double-take-up roll winder and the back-up roll winder. In the former, to which the invention alone refers, are on two axially parallel support rollers as much sleeves in the axial direction next to each other in the winding bed as part webs are cut. So that the individual tracks can be wound onto the respective sleeves, the single-track starts on the sleeves must be determined. For this purpose, the sleeves are regularly provided with a double-sided adhesive tape or the like. In the marginal sleeves of the sleeve set engages a sleeve guide head during the entire winding process, which holds the sleeve or the resulting finished roll set "centered". The finished rolls want to give a certain winding structure. The rollers should be regularly wrapped harder inside than in their peripheral area. In other words, the winding hardness should decrease from the inside out. Such a winding hardness curve can not be realized without suitable measures. At the beginning of the winding process, the single roles are practically only from the winding tubes. They are then so light that the forces resulting from their weight in the two nips between the rollers and the support rollers to produce the desired winding hardness are not sufficient. It is therefore known to press the single roll set with additional force into the winding bed at the beginning of the winding process by means of a load roller placed on its crest line; With increasing diameter and thus increasing weight of the individual roles, this additional force is of course deliberately reduced.

As mentioned above, it is almost always possible to produce several finished sets of rolls from one and the same parent roll. The procedure is as follows: If the current finished roll set has almost reached its nominal diameter, the working speed is reduced to 0 m / min over a predetermined ramp. Shortly before reaching standstill - when the standstill occurs, the actual diameter of the finished rolls naturally corresponds to the nominal diameter - the individual webs are cut off, the ends of which are still fixed on the respective rollers in the caster. Then, when the system is stationary, the finished customer roll set is ejected from the winding bed and a new set of tubes is introduced into the released winding bed - cf. eg DE 43 34 029 C2 , Only when this is done, a new winding process can begin. The person skilled in the art summarizes these processes under the term "set or throw change". It is clear that these set changes cost time and reduce the productivity of the slitters. To illustrate the negative impact, the following example: If a set change takes place on average every 6 minutes during reel cutting - this figure is quite practical - then there are already a considerable number of 240 set changes in 24-hour operation. Extrapolated to one year of operation, this results in about 85,000 small "production losses", resulting in a duration of 20 sec per set change annually to approx. 20 days "production interruption" added up.

With respect to the prior art is on DE 602 03 901 T2 referenced in which a method and apparatus for a double carrier roll winder are described in which one of the two day rollers is moved for the set change, that temporarily results in a distance between the two support rollers, which is large enough to move a set of new cores from below through the gap upwards. Of course, once the new sleeve set has passed the gap, the previously moved carrier roll must be moved back to its original position.

Similar facilities are also from the DE 38 16 774 A1 and the US Pat. No. 3,841,578 known.

From the DE 20 32 724 A1 in the set change the new sleeve set of under and under contact training between the two support rollers is pressed through. However, he reaches the space above it, when outsourcing the finished winding roll set.

From the US 4 183 474 A is a generic winding device known.

The invention has the object of developing a method and a device of the aforementioned types so that the "loss times" described above are largely reduced without major construction effort.

This object is achieved according to the invention in the method of the type mentioned above by supporting the sleeve by means of a device which is in through the invariable gap between the support rollers in said space or moved out of said space and at its upper edge carries a machine-wide element, which is transformed in said space to a sleeve groove.

In the device of the type described above, the object is achieved in that the device carries at its upper edge a machine-wide element that can be deformed in the said space to a sleeve groove.

According to the invention, a new set of winding tubes is already introduced at a time in the winding bed in the course of the set change, in which the current set of finished rolls is in full winding. Prerequisite for the introduction of the sleeves is of course that of the two support rollers and the current winding limited space has become so large that he is able to accommodate the new sleeves. This condition is not given at the beginning of each winding process, but inevitably occurs as soon as the diameter of the currently wound rolls has reached a certain diameter. From now on in the gusset, which is below the formed by the current winding () and the support rollers limited space a machine-wide means is pushed through the invariable gap between the support rollers through said space, where attached to this device and below explained element after its transformation is able to support the new sleeve set. For the loading of this supporting element, which can also be described as a sleeve groove, with sleeves, there are various known means, the representation of which can be dispensed with here. It is understood that the device returns from its working position just described on the opposite way back to its original position as soon as the sleeves need no support through them, because they are now held by the support rollers in the course of the new winding process and thereby caused diameter increase.

Advantageous developments emerge from the respective subclaims.

• Fig. 1 in schematisierter Form die Seitenansicht einer Rollen- schneidmaschine vom Doppeltragwalzentyp;
• Fig. 2 den von den beiden Tragwalzen und dem laufenden Wickel begrenzten Raum in dem Augenblick, ab dem erstmalig hinrei- chend Platz für einen Satz neuer Wickelhülsen gegeben ist;
• Fig. 3 die erfindungsgemäße Vorrichtung in Grundstellung/Ruhe- stellung;
• Fig. 4 die erfindungsgemäße Vorrichtung in Arbeitsteilung,
• Fig. 5 einen vergrößerten Ausschnitt aus Fig. 3,
• Fig. 6 einen vergrößerten Ausschnitt aus Fig. 4. Gleiche Teile sind jeweils mit der gleichen Bezugsziffer versehen.

Hereinafter, the invention with reference to the FIGS. 1 to 4 but it should by no means be limited to the details presented therein. Herein show:

• Fig. 1 in schematic form, the side view of a twin-roller type roller cutting machine;
• Fig. 2 the space delimited by the two support rollers and the current winding at the moment when there is sufficient space for a set of new cores for the first time;
• Fig. 3 the device according to the invention in basic position / rest position;
• Fig. 4 the device according to the invention in division of labor,
• Fig. 5 an enlarged section Fig. 3 .
• Fig. 6 an enlarged section Fig. 4 , The same parts are each provided with the same reference number.

In the Fig. 1 shown slitter (1) comprises a roll (2) in which a full so-called mother roll (3) is rotatably mounted, deducted from the possibly. Up to 11,000 mm wide web (4) and then in a longitudinal cutting device (5) in single tracks is split. These individual webs are then fed into a winding bed (8) consisting of two support rollers (6, 7), in which they are wound on reel sleeves (12) into finished rolls (9). According to the figure, the single webs run through the gap (10) between the two support rollers (6, 7) on the sleeves; this run is referred to as "feed from below". But there are also different web guides are known in which the individual webs initially wrap around one of the two support rollers (6 or 7), in order then to enter "from above" in the nip between the sleeves and the respective support roller. During the winding process, the sleeves / single rolls set of two, in the marginal sleeve or individual roles / winding engaging, not shown here guide heads held. Also, a pressure roller (11) is provided, which presses the single roller set at least at the beginning of the winding process in the winding bed (8). According to the invention, the slitter-winder (1) is finally equipped with a device (14), which serves the sleeve handling and the Fig. 3 and Fig. 4 is shown in more detail.

Incidentally, the comparison of the diameter of mother roll and finished rolls, which is at least the correct order of magnitude, makes it clear that several sets of finished rolls can be produced from one and the same mother roll.

In the Fig. 2 illustrated situation shows the conditions that must prevail so that the slitter can already be fed in the ongoing winding process with a set of new cores. Basis are dimensions, as they are known in practice. Thereafter, the insertion of sleeves (12) with an outer diameter of 120 mm for support rollers (6, 7) with a diameter of 1,000 and a center distance of 1,020 mm only possible when the diameter of the rolling rolls located in rolling (9) has a diameter 950 mm - the final diameter is assumed to be 1.440 mm.

In Fig. 3 the device according to the invention is shown in its initial position. The device (14), which is to form a sleeve groove (18) later, is arranged in the lower gusset between the support rollers (6, 7). It consists of a machine-width in the X-direction and narrow in the Y-direction (dimension preferably less than 40 mm) part, at its upper edge (15) mounted an element (16) which is also machine width in the X direction and in Y Direction also extends at most up to, for example, 40 mm. From this position, the device (14) in a manner not shown vertically movable so that the element (16) through the invariable gap (10) between the two support rollers (6, 7) are pushed through in the upper gusset to there to be "spread out". Said element (14) consists of a hinge pair (17) hingedly connected to the device (14) on a common longitudinal axis. These strips are here vertically close together, are not shown separately means but also from its vertical position in a horizontal swivel.

Fig. 4 Finally, the device in its working position in the upper gusset between the two support rollers (6, 7). Here are the strips (17) that are in Fig. 3 appear in the folded state, by spreading "spread" so that it now forms a support surface (18) which is able to support the sleeves. It is understood that the bar pair solution is only one variant among many other equally effective solutions; next to it, for example, telescopically extend to the left and right spreading parts or a hose-like device, which is spreadable after passing through the gap by means of a fluid.

Fig. 5 This one cut out Fig. 3 reproducing magnified representation is merely a better illustration and therefore requires no own commentary.

Fig. 6 This one cut out Fig. 4 reproduced enlarged representation also serves only a better illustration, so that can be dispensed with a separate explanation.

LIST OF REFERENCE NUMBERS

1 Winder 2 unwind 3 motherhood 4 web 5 Slitter 6 Carrier roller 1 7 Carrier roller 2 8th winding bed 9 Wrap / finished roll 10 gap 11 pressure roller 12 shell 13 room 14 Facility 15 top edge 16 element 17 bar pair 18 core channel

Claims (9)

1. Method for winding up a material web (4) onto at least one core (12) lying in a winding bed (8) formed from two carrier rolls (6, 7), the reel (9) produced being pressed into the winding bed (8) by a pressure roll (11), at least in the initial phase of the winding process, and, after an intended final diameter has been reached, being ejected out of the winding bed (8), at least at a reduced winding speed, severing the material web (4), and the new material web start produced by the severing subsequently being wound onto at least one new core (12) introduced into the winding bed (8), the at least one new core (12) being introduced into the space (13) delimited by the two carrier rolls (6, 7) and the running reel (9) at the earliest as soon as the geometric relationships of this space (13) and the core (12) permit this,
   characterized in that
   the core is supported by means of a device which is moved into the aforesaid space and out of the aforesaid space through the unchangeable gap between the carrier rolls and, at its upper edge, bears a machine-width element which is reshaped to form a core channel in the aforesaid space.
2. Method according to Claim 1,
   characterized in that
   the at least one new core (12) is introduced into the space (13) delimited by the two carrier rolls (6, 7) and the running reel (9) as soon as the geometric relationships of this space (13) and the core (12) permit this.
3. Method according to Claim 1 or 2,
   characterized in that
   a core channel (18), on which the at least one core (12) is subsequently placed in a conventional way, is firstly created in the space delimited by the two carrier rolls (6, 7) and the running reel (9).
4. Method according to one of the preceding claims,
   characterized in that
   the core channel (18) is removed from the space (13) delimited by the two carrier rolls (6, 7) and the running reel (9) again at the earliest when the new reel (9) produced on the at least one core (12) in the course of the winding process has come free of the core channel (18).
5. Method according to one of the preceding claims,
   characterized in that
   it proceeds under automatic control.
6. Apparatus for winding up a material web (4) onto at least one core (12) lying in a winding bed (8) formed from two carrier rolls (6, 7), it being possible for the reel (9) produced to be pressed into the winding bed (8) by a pressure roll (11), at least in the initial phase of the winding process, and, after an intended final diameter has been reached, to be ejected out of the winding bed (8), at least at a reduced winding speed, severing the material web (4), and it being possible for the new material web start produced by the severing to subsequently be wound onto a new core (12) introduced into the winding bed (8), there being arranged in the pocket underneath the delimited space (13) formed by the running reel (9) and the carrier rolls (6, 7) a machine-width device (14), which can be moved into the aforesaid space and out of the aforesaid space through the unchangeable gap (10) between the carrier rolls (6, 7),
   characterized in that
   at its upper edge (15), the device (14) bears a machine-width element (16) which can be reshaped to form a core channel (18) in the aforesaid space (13).
7. Apparatus according to Claim 6,
   characterized in that
   the element (16) comprises a pair of bars (17) connected to the device (14) in the manner of a hinge on a common longitudinal axis, and in that each of the two bars (17) can be pivoted out of its original vertical position into a horizontal position, which results in a core channel (18), and can be pivoted back out of the horizontal position into a vertical one again, so that the core channel (18) is eliminated.
8. Apparatus according to one of the preceding claims,
   characterized in that
   there are mechanical, pneumatic, hydraulic or electric actuators which control the movements.
9. Apparatus according to Claim 8,
   characterized in that
   a system monitors the operating state in which the slitter-rewinder (1) is found in each case, and controls the actuators such that the core loading operation can take place automatically with the winding process continuing.

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