INSTALLATION FOR A MATERIAL WEB

Abstract

An installation includes a guide arrangement, guiding a material web, a conveying speed detection device, detecting a conveying speed of the conveyed material web, and a winding arrangement arranged downstream from the conveying speed detection device. The winding arrangement includes a rotatably mounted winding device, winding up the material web. The winding device is non-circular in cross section at least in a material web winding-up region, folding the material web. The winding arrangement has a rotary drive, in driving connection with the winding device, driving the winding device in rotation. An actuating device is at least temporarily in signal communication with the conveying speed detection device for receiving conveying speed signals therefrom, characterizing the respective conveying speed of the material web, and is at least temporarily in signal communication with the rotary drive for actuating the latter upon folding the material web in dependence on the conveying speed signals.

Claims

1. An installation for a material web, the installation comprising a) a guide arrangement for guiding the material web, b) a conveying speed detection device for detecting a conveying speed of the material web conveyed in a conveying direction, c) a winding arrangement arranged downstream from the conveying speed detection device in the conveying direction, wherein the winding arrangement comprises i) a rotatably mounted winding device for winding up the material web, wherein the winding device, at least in a material web winding-up region, is configured to be non-circular in cross-section for folding the material web, and ii) a rotary drive, being in driving connection with the winding device, for driving the winding device in rotation, and d) an actuating device which i) is at least temporarily in signal communication with the conveying speed detection device for receiving conveying speed signals therefrom, characterizing the respective conveying speed of the material web, and ii) is at least temporarily in signal communication with the rotary drive for actuating the latter upon folding the material web ( )in dependence on the conveying speed signals.

2. The installation according to claim 1, wherein the winding device is formed as a polygon in cross-section at least in the material web winding-up region.

3. The installation according to claim 1, wherein the winding device, at least in the material web winding-up region, is configured as one of the group of an ellipse and essentially an ellipse in cross-section.

4. The installation according to claim 1, wherein the actuating device actuates the rotary drive differently in dependence on an existing number of layers of the material web on the winding device.

5. The installation according to claim 1, wherein a maximum angular speed of the winding device ( )while winding up the material web decreases with an increase of layers of the material web on the winding device.

6. The installation according to claim 1, wherein a minimum angular speed of the winding device while winding up the material web decreases with an increase of layers of the material web on the winding device.

7. The installation according to claim 1, wherein the actuating device actuates the rotary drive differently in dependence on a folding progress.

8. The installation according to claim 1, wherein the winding device rotates most slowly when folds are produced in the material web.

9. The installation according to claim 1, wherein the winding device rotates faster when the material web is received on the winding device than when folds are produced.

10. The installation according to claim 1, further comprising a material web weakening apparatus arranged upstream from the winding arrangement in the conveying direction for producing target bending lines in the material web.

11. The installation according to claim 10, wherein between the winding arrangement and the material web weakening apparatus a target bending line distance detecting device for detecting distances between successive target bending lines in the material web is arranged, wherein the actuating device is at least temporarily in signal communication with the target bending line distance detecting device for detecting a respective distance between successive target bending lines in the material web and actuates the material web weakening apparatus in dependence on an existing number of layers of the material web on the winding device.

12. The installation according to claim 1, wherein the actuating device actuates the rotary drive so that the conveying speed of the material web remains constant.

13. The installation according to claim 1, wherein the winding device together with the wound-up material web is replaceable.

14. The installation according to claim 1, further comprising at least one splicing arrangement for producing one of the group comprising a continuous material web and a partial web thereof, wherein the at least one splicing arrangement comprises a storage device for storing one of the group comprising the material web and partial web thereof and for conveying the material web uninterruptedly when the winding device is replaced.

15. The installation according to claim 1, wherein the winding device comprises an information unit (27) with changeable information about at least one of the group comprising the material web and winding.

16. The installation according to claim 1, further comprising a corrugated cardboard arrangement (2), arranged upstream from the guide arrangement in the conveying direction of the material web, for producing a corrugated cardboard web which forms the material web.

17. A method, comprising guiding of a material web by means of a guide arrangement, detecting a conveying speed of the material web conveyed in a conveying direction by means of a conveying speed detection device, winding up of the material web by means of a rotatably mounted winding device of a winding arrangement arranged downstream from the conveying speed detection device in the conveying direction, wherein the winding device is configured to be non-circular in cross section, at least in a material web winding-up region, for folding the material web, rotationally driving the winding device by means of a rotary drive of the winding arrangement, wherein the rotary drive is in driving connection with the winding device, receiving conveying speed signals characterizing the respective conveying speed of the material web from the conveying speed detection device, which is at least temporarily in signal communication with an actuating device, and actuating the rotary drive upon folding the material web in dependence on the conveying speed signals by means of the actuating device, wherein the rotary drive, for this purpose, is at least temporarily in signal communication with the actuating device.

18. The installation according to claim 1, wherein the installation is configured for a corrugated cardboard web.

19. The installation according to claim 2, wherein the winding device has between three and eight corners in cross-section.

20. The installation according to claim 2, wherein the winding device has between three and six corners in cross-section.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0042] FIG. 1 shows a schematic view of an installation according to the invention,

[0043] FIG. 2 shows a schematic view of a winding arrangement according to the invention in accordance with an alternative embodiment of the installation illustrated in FIG. 1,

[0044] FIGS. 3, 4 show a schematic view of a winding arrangement according to the invention in accordance with a further embodiment of the installation shown in FIG. 1, and

[0045] FIGS. 5 to 10 show side views or cross-sections of alternative winding devices in their material web winding-up region or of winding cores of the installation illustrated in FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0046] An installation shown in FIG. 1 for folding or winding up an, in particular continuous, multilayer corrugated cardboard web 1 comprises a corrugated cardboard arrangement 2 for producing the corrugated cardboard web 1. Such a corrugated cardboard arrangement 2 is known, for example, from DE 103 12 600 A1, to which reference is hereby made. The corrugated cardboard web 1 is conveyed or produced in a conveying direction 3 at a consistent or constant conveying speed v.

[0047] Downstream from the corrugated cardboard arrangement 2 in the conveying direction 3 of the corrugated cardboard web 1 is a corrugated cardboard web weakening apparatus 4, which is designed as a crimping apparatus. The crimping apparatus 4 comprises a pair of embossing rollers 5, which are each rotatably mounted about horizontal embossing roller axes. The embossing roller axes run parallel to one another and perpendicular to the conveying direction 3. The embossing rollers 5 are arranged vertically one above the other. The distance between the embossing rollers 5 is adjustable. An embossing roller gap 6 is formed between the embossing rollers 5.

[0048] On its surface or shell surface, each embossing roller 5 has at least one embossing element 7 which is beam-shaped and blunt. It has an extension in the radial direction, i.e. perpendicular to the surface of the respective embossing roller 5, which is less than half the distance between the embossing rollers 5.

[0049] The embossing rollers 5 can be driven in rotation by means of an embossing roller drive device 8, which is in driving connection with the embossing rollers 5, for example via a coupling or a gearbox.

[0050] The embossing elements 7 are arranged on the circumference of the embossing rollers 5 or driven in rotation during operation in such a way that they meet each other when the embossing rollers 5 are driven in rotation about the respective embossing roller axis. When the embossing elements 7 meet, the embossing roller gap 6 is reduced to a value which is smaller than a thickness of the corrugated cardboard web 1. The corrugated cardboard web 1 is thus squeezed in a line-like manner by means of the embossing elements 7, but remains coherent.

[0051] The embossing elements 7 are aligned parallel to the embossing roller axes in order to emboss folds or target bending lines in the corrugated cardboard web 1, which run perpendicular to the conveying direction 3 and are arranged at a distance from one another in the conveying direction 3 or longitudinal extension of the corrugated cardboard web 1. FIG. 1 shows, by way of example, two fold or target bending regions 9 of the corrugated cardboard web 1, each of which has a fold or a target bending line. The folds have a distance d from one another in the conveying direction 3 or longitudinal direction of the corrugated cardboard web 1 and form target bending lines in the corrugated cardboard web 1, along which the latter can be folded or creased in a particularly simple and controlled manner. The corrugated cardboard web 1 is weakened at the folds or target bending lines and has a comparatively low bending strength there.

[0052] According to an alternative embodiment, each embossing roller 5 has at least two embossing elements 7, which are arranged on the respective embossing roller 5 at evenly spaced intervals to one another in the circumferential direction of the respective embossing roller 5.

[0053] According to an alternative embodiment, only exactly one embossing roller 5 has at least one embossing element 7. The other roller then forms a counter roller.

[0054] Downstream from the crimping apparatus 4 in the conveying direction 3 is an optical detection device 10, which is assigned to the corrugated cardboard web 1. The detection device 10 is capable of detecting the actual conveying speed v of the corrugated cardboard web 1 in the conveying direction 3. Furthermore, the detection device 10 is capable of detecting the actual respective distance d of the folds or target bending lines in the corrugated cardboard web 1 in the conveying direction 3 or the longitudinal extension of the corrugated cardboard web 1. For this purpose, the detection device 10, for example, has a conveying speed detection sensor and a fold or target bending line detection sensor.

[0055] A winding arrangement 11 is arranged downstream from the detection device 10 in the conveying direction 3 of the corrugated cardboard web 1.

[0056] The winding arrangement 11 comprises a support frame 12 which is supported relative to a floor. The support frame 12 carries a receiving device which has at least one first support or bearing means.

[0057] The winding arrangement 11 further has a winding device 13 which, in the assembled state of the winding arrangement 11, is rotatably or rotationally drivably received in the receiving device and extends horizontally. For this purpose, the winding device 13 has at least one second support or bearing means which interacts or is in connection with the at least one first support means accordingly. For example, if the at least one first support means is formed by at least one hollow core or an opening, the at least one second support means is formed by a corresponding mandrel, pin or the like. If the at least one first support means is formed by, for example, a pin, mandrel or the like, the at least one second support means, for example, has at least one corresponding opening, recess or the like. The winding device 13 is attached, for example, to a mounting suspension.

[0058] In addition, the winding device 13 has a winding core 14 which has a square cross-section or a square outer contour in cross-section and forms a winding-up region 15 for the corrugated cardboard web 1. The winding core 14 is cuboidal in shape. The winding-up region 15 is formed by flat side surfaces 16 which are at right angles to one another, which are arranged consecutively in the circumferential direction and are separated from one another by four edges 17 which are running parallel to one another. The edges 17 extend perpendicularly to the conveying direction 3 of the corrugated cardboard web 1. In cross-section, the winding core 14 has four rectangular corners 18 which are ends of the edges 17. The winding core 14 is dimensionally stable.

[0059] The winding core 14 also has two opposing end faces 19 which centrally support the at least one second support means.

[0060] The winding arrangement 11 further comprises a rotary drive 25, which is in driving connection with the winding device 13 and is capable of driving the latter in rotation in a direction of rotation 20 or its circumferential direction about its central horizontally extending central longitudinal axis 21.

[0061] Furthermore, the installation has an actuating device 22 with a crimping apparatus actuating unit 23. The crimping apparatus actuating unit 23 is at least temporarily in signal communication with the embossing roller drive device 8 for actuating or controlling the latter. This signal communication can be wireless or wired.

[0062] The actuating device 22 also has a winding device actuating unit 24 which is at least temporarily in signal communication with the rotary drive 25 to actuate or control the latter. This signal communication may be wireless or wired.

[0063] The actuating device 22 also has a receiving unit 26 which is at least temporarily in signal communication with the detection device 10 and is capable of receiving signals relating to the current actually prevailing conveying speed v of the corrugated cardboard web 1 and the distances d between successive folds. This signal communication can be wireless or wired.

[0064] The operation or function of the installation is described in more detail below. The corrugated cardboard arrangement 2 produces the corrugated cardboard web 1 and conveys it in the conveying direction 3 at a constant conveying speed v. The corrugated cardboard web 1 crosses the embossing roller gap 6 and passes the detection device 10. The corrugated cardboard web 1 is wound up onto the winding core 14, which is driven in rotation for this purpose by the rotary drive 25. The angular speed of the winding core 14 depends on the conveying speed of the corrugated cardboard web 1 and the transverse dimension of the winding core 14. The direction of rotation of the winding core 14 remains the same. In a corrugated cardboard web receiving region of the winding arrangement 11, the conveying direction 3 of the corrugated cardboard web 1 and the direction of rotation 20 of the winding device 13 are substantially identical. It is convenient if the corrugated cardboard web 1 is under tension or strain during winding up.

[0065] The corrugated cardboard web 1 initially rests closely on the outside of the winding region 15 of the winding core 14. A beginning of the corrugated cardboard web 1 can, for example, be fixed locally on the winding core 14. Each new layer of the corrugated cardboard web 1 wound up onto the winding core 14 rests on the outside closely against the underlying layer of the wound-up corrugated cardboard web 1. The edges 17 or corners 18 of the winding core 14 directly or indirectly fold or crease the corrugated cardboard web 1 by 90°. They engage with the corrugated cardboard web 1 in the region of its folds or target bending lines. The length of the corrugated cardboard web 1 that can be wound up per layer depends on the circumference of the winding core 14 and the number of layers of the corrugated cardboard web 1 already wound up.

[0066] With each layer of corrugated cardboard web 1 wound up onto the winding core 14, the length of the respective layer of corrugated cardboard web 1 newly wound up onto the winding core 14 increases. The straight regions of the corrugated cardboard web 1 extending adjacent to each side surface 16 of the winding core 14 correspondingly become longer per layer. The length of the layers of the wound-up corrugated cardboard web 1 also depends on the thickness of the corrugated cardboard web 1.

[0067] The crimping apparatus actuating unit 23 actuates the embossing elements 7 in such a way that the folds or target bending lines always come to lie adjacent to the edges 17 or corners 18 of the winding core 14 or to folds of the corrugated cardboard web 1 lying below them. The folds in each layer lie above the folds of the layer arranged below. With each layer of corrugated cardboard web 1 wound up onto the winding core 14, the distance d between successive folds is thus increased. In doing so, the distance d depends on the number of layers and the corrugated cardboard web 1 wound up with them, and increases.

[0068] The detection device 10 thereby detects the current distance d of successive folds and the current conveying speed v of the corrugated cardboard web 1 in the conveying direction 3.

[0069] Due to the winding core 14 being configured to be non-circular, the winding device actuating unit 24 actuates the rotary drive 25 in dependence on a folding progress or on a respective position of the winding core 14 relative to the incoming corrugated cardboard web 1. Since the edges 17 or corners 18 are at a greater distance from the central longitudinal axis 21 than, for example, a central region of a side surface 16 extending between adjacent edges 17, the winding core 14 is driven in rotation in such a way that the corrugated cardboard web 1 can be conveyed at a constant conveying speed. The winding-up speed of the winding arrangement 11 is preferably dynamically adapted. A non-linear angular speed curve of the winding core 14 or of the winding device 13 is present. The actuating device 22 controls the rotary drive 25 accordingly.

[0070] Free creasing is avoided. Continuous winding up is possible.

[0071] In the following, a preferred embodiment of the winding arrangement 11 is described with reference to FIG. 2. In comparison with the previous embodiment, an information unit 27 is firmly connected to the winding core 14. It is arranged at a support or bearing means of the winding device 13 and is designed as an RFID tag.

[0072] In the following, a further preferred embodiment is described with reference to FIGS. 3, 4. In this embodiment, the winding device 13 is detachable from the support frame 12. The winding device 13 can thus be transported and received by another support frame 28. The corrugated cardboard web 1 is detached for transport. The winding device 13 is separated from the upstream corrugated cardboard web 1. The end of the corrugated cardboard web 1 is preferably fixed to the underlying layer of the wound-up corrugated cardboard web 1.

[0073] Alternatively, the installation can be operated without the crimping apparatus 4. The edges or corners of the winding core are then designed in such a way that they themselves form target bending lines in the corrugated cardboard web. They are sharp-edged.

[0074] FIG. 5 shows a winding core 14 which has the cross-section of an equilateral triangle or has the outer contour of an equilateral triangle in cross-section. The winding-up region 15 is formed by flat surfaces 16 which are inclined to one another, are arranged consecutively in the circumferential direction and are separated from one another by three edges 17 which are running parallel to one another. The edges 17 extend perpendicularly to the conveying direction 3 of the corrugated cardboard web 1. In cross-section, the winding core 14 has three corners 18 which are ends of the edges 17 and have an angle of 60° in each case. The winding core 14 is supported as to be driven in rotation at its center of gravity or center. Otherwise, reference is made to the previous explanations with respect to the design of the angle arrangement 11 or with respect to the function of the installation.

[0075] FIGS. 6 to 9 show further winding cores 14 which can be used alternatively and which are designed in cross-section as an equilateral or regular pentagon (FIG. 6), hexagon (FIG. 7), heptagon (FIG. 8) or octagon (FIG. 9). With regard to the specific design of the winding arrangement 11 and the function of the installation, explicit reference is made to the previous explanations.

[0076] FIG. 10 shows an alternatively usable winding core 14, which is essentially formed as an ellipse in cross-section. At two vertices lying on a main axis of the ellipse, the winding core 14 has edges 17 extending parallel to one another, which lie in a common main plane of the winding core 14 and extend parallel to one another. There, in each case, the winding core 14 substantially has an acute angle upon forming of the edges 17. Between the edges 17, the winding core 14 is curved outwardly. With regard to the design of the winding device 13 and the function of the installation, reference is made to the previous explanations.