EP2396227A1

EP2396227A1 - Cutting and expanding device

Info

Publication number: EP2396227A1
Application number: EP10700818A
Authority: EP
Inventors: Bernd Cox
Original assignee: KHS GmbH
Current assignee: KHS GmbH
Priority date: 2009-02-10
Filing date: 2010-01-20
Publication date: 2011-12-21
Anticipated expiration: 2030-01-20
Also published as: US20110226108A1; PL2396227T3; WO2010091771A1; US9254979B2; EP2396227B1

Abstract

The invention relates to a cutting and expanding device for cutting a web of packaging material that is fed to the device via a web inlet into a plurality of individual webs that are conveyed away from the device at a web outlet and spaced apart from one another.

Description

Cutting and spreading device

The invention relates to a cutting and spreading device according to the preamble of claim 1.

The processing of sheet-like flat materials in the form of packaging films, in particular shrink films on packaging machines and especially on shrink packers is known. With the respective packaging film thereby products or product-filled packaging materials, such as. Bottles, cans, soft packs, etc., but also packaged from such products or packaging. In a subsequent shrink tunnel of the packaging machine then shrinking the film takes place in such a way that this firmly attaches to the respective product or packaging and thereby a stable, salable package or container is obtained.

The webs of sheet material used for packaging, for example packaging or shrink film, are usually provided in a web width which is greater than the web width required for further processing. It is therefore known to cut the original or conveyed web of flat material in a cutting and spreading device one or two times in the web longitudinal direction so as to produce two or three individual webs having the web width required for packaging. In order to enable the processing of the single webs, it is also necessary to separate these single webs after cutting, i. to spread.

The object of the invention is to show a cutting and spreading device, which ensures a high degree of flexibility in terms of the number of single tracks created by cutting with a simplified design and operability. To solve this problem, a cutting and spreading device according to the patent claim 1 is formed.

Further developments, advantages and applications of the invention will become apparent from the following description of exemplary embodiments and from the figures. All the described and / or illustrated features are in themselves, or in any combination, the subject of the invention, regardless of their combination in the claims or their dependency. Also, the content of the claims is made an integral part of the description. The invention will be explained in more detail below with reference to the figures of an embodiment. Show it:

1 in a simplified representation and in plan view, a cutting and Spreizvor- direction according to the invention;

Fig. 2, the cutting and spreading device of Figure 1 in side view.

In the figures, 1 is a sheet of flat material in the form of a packaging material or packaging film, for example in the form of a shrink film, which is used to package products or packaging materials, not shown in detail. is used by shrinking in a packaging machine, also not shown.

For the packaging, the web 1 fed in a transporting direction A is moved longitudinally and, for example, continuously into a plurality of individual webs, i. in the illustration of Figure 1 in four individual tracks 2.1 - 2.4 cut, the e.g. have the same width. This cutting takes place in the generally designated 3 in the figures cutting and spreading device. In this not only the individual webs 2.1 - 2.4 are generated by cutting the web inlet 3.1 fed web 1, but at the same time a spreading, i. a separation of the individual sheets 2.1 - 2.4 causes, in the form that the moving away from the cutting and spreading device 3 at a web outlet 3.2 in the conveying direction A single sheets 2.1 - 2.4 are spaced apart.

The cutting and spreading device 3 is formed substantially mirror-symmetrically to a vertical center plane M, which is oriented parallel to the conveying direction A of the web 1 and the individual webs 2.1 - 2.4 and perpendicular to the plane of these webs, and includes i.a. a device frame 4 with two plate or platinum-like outer frame members 5, which are arranged with their surface sides parallel to the transport direction A and in planes perpendicular to the plane of the web 1. The spaced-apart frame members 5 are interconnected by trusses 6 of the device frame 4. The distance that the frame members 5 have from each other is greater than the width of the web 1 and also greater than the distance between the outer longitudinal sides of the two outer individual webs 2.1 and 2.4 from each other. With its frame longitudinal axis L of the device frame 4 is oriented in the conveying direction A.

On the outside of each frame element 5, which faces away from the interior of the device frame 4, in each case in the direction of the longitudinal axis L of the frame, other staggered two adjusting plates 7 and 8 are provided, which abut against the inner surface of the associated frame member 5 and are provided on this frame member 5 by guide means by a predetermined stroke in the direction of the frame longitudinal axis L slidably as with the double arrow H7 for the adjusting plates 7 and is indicated by the double arrow H8 for the adjusting plates 8 in Figure 2.

The adjustment of the displacement plates 7 and 8 enabling guide means are, for example, on the frame member 5 rotatably mounted guide rollers 9 which are received in slot-like guide openings 10 in the displacement plates 7 and 8, and guide pins 11 in associated longitudinal slots 12 in the displacement plates 7 and 8 engage and at the same time limit the maximum possible movement stroke H7 or H8 of the adjusting plates.

At the top of the adjusting plates 7 and 8 are each provided with a toothing 13 and 14 respectively. About the teeth 13, the adjusting plate 7 is drivingly connected to one side of the device frame 4 with the adjusting plate 7 on the other side of the device frame 4, via a not shown, with the teeth 13 cooperating gear assembly, which is also not shown, itself Having between the frame members 5 extending and rotatably mounted in these frame elements shaft. In the same way, the adjusting plates 8 are drivingly connected to each other on the two sides of the device frame 4 via their teeth 14 and a shaft assembly having a gear arrangement. The adjustment of the adjusting plates 7 and 8 is also carried out manually and / or by way of the gear arrangements, wherein a single gear arrangement is preferably provided for all adjusting plates 7 and 8.

On each adjusting plate 7, a coupling plate 15 is fixed, which extends away from the adjusting plate 7 and the adjusting plate 8 overlapped in a partial area and at its end remote from the adjusting plate in the region of an opening in the adjusting plate 8 has a bearing 16. Corresponding bearings 16 are also provided on the adjusting plates 7 and 8.

In the device frame 4, a plurality of rollers 17-20 are freely rotatably mounted, starting from the web outlet 3.2 against the conveying direction A on each side of the center plane M, a first roller 17, then a second roller 18, then a third roller 19 and thereto then a fourth roller 20. The rollers 19 - 20 are thus provided in duplicate. In the illustrated Embodiment own all, on its lateral surface circular cylindrical running rollers 17 - 20 have the same outer diameter.

In the illustrated embodiment, the rollers 17 and 18 are arranged with their axes in a common plane E1 parallel or substantially parallel to the plane of the web 1 at the web inlet 3.1 and the axes of the rollers 19 and 20 in a common plane E2, which is also parallel or is substantially parallel to the plane of the web 1 at the web inlet 3.1, but at a distance above the plane E1 extends, wherein the distance between the planes E1 and E2 at least equal to the diameter of the rollers 17 - 20 is.

The rollers 17 and 19 are each mounted with an outer end in a bearing 16 on one of the displacement plates 8 and with an inner end in the region of the median plane M at a central bearing 21 freely rotatable.

The two rollers 18 are freely rotatably mounted with their outer ends in a bearing 16 on a coupling plate 15 and at their inner ends in the region of the median plane M at a bearing 21. The two rollers 20 are rotatably supported on bearings 21 at their outer ends in a bearing 16 on the adjusting plate 7 and on their inner ends adjacent to the median plane M. The bearings 21 are e.g. each provided on one of the trusses 6 or on an inner, connected to the trusses 6 frame element.

At the web inlet 3.1, a further, over the entire width of the device frame 4 extending roller 22 is freely rotatably mounted between the frame members 5, which serves to support the web 1. Following the roller 22 in the transport direction A, a plurality of cutting devices 24 are provided at the web inlet 3.1 on a traverse 23, which in the illustrated embodiment are each formed by a cutting blade and with which the web 1 is cut into the individual webs 2.1-2.4. The cutters 24 are along the traverse 23, i. parallel to the plane of the web 1 and perpendicular to the conveying direction A adjustable. Furthermore, the cutting devices are each individually movable between a cutting state in which the cutting device 24 in question causes the cutting of the web 1, and a non-operative state, for example by pivoting.

As shown in particular in FIG. 1, the rollers 17-20 are inclined, in such a way that the axes of these rollers are in each case parallel or substantially parallel to the plane of the web 1 at the web inlet 3.1 in planes, but with the center plane M include an angle smaller than 90 °, which opens to the web outlet 3.2 out. Further, as shown in FIG. 1, the arrangement is such that the rollers 17 and 19 and the rollers 18 and 20 each form a group of rollers on each side of the median plane M, and that the rollers of each group of rollers are parallel or parallel with their axes are arranged substantially parallel to each other.

In order to cut the web 1 into the four individual webs 2.1 - 2.4, three cutters 24 are provided, e.g. such that the distance of the two outer cutting devices 24 from the respective edge of the web 1 and the mutual distance between two cutting devices 24 is equal to the width of the individual webs 2.1 - 2.4.

With the two outer cutting devices 2.4, the two outer single webs 2.1 and 2.4 are generated. These individual webs initially extend within the cutting and spraying device 3 to one of the rollers 17, then around this roller upwards to one of the rollers 19 and upwards again around the latter, so that the particular single web 2.1 or 2.4 extends the cutting path. and spreading device 3 above the plane E2 leaves.

The middle individual webs 2.2 and 2.3 are generated by the outer cutters 24 and by the central cutter 24 and extend within the cutting and spreading device 3 first to one of the rollers 18, then around this roller up to one of the rollers 20 and around them Roller around upwards, so that the respective single track 2.2 and 2.3, the cutting and spreading device 3 then leaves in the conveying direction A again above the plane E2.

Due to the inclination of the rollers 17-20, the spreading of the individual webs 2.1 - 2.4 is achieved in such a way that they are spaced apart at the web outlet 3.2 with their longitudinal extent to each other and from each other. The distance that the individual tracks 2.1 -2.4 have from each other is adjustable by the inclination of the rollers 17-20.

As shown in FIG. 1, the inclination of the rollers 18 and 20 is smaller than the inclination of the rollers 17 and 19, ie the angle which the axes of the rollers 18 and 20 enclose with the median plane M is greater than the corresponding angle of the axes the rollers 17 and 19. The inclination of the rollers 17 - 20 and thus the distance of the individual tracks 2.1 - 2.4 are by moving the Ver Adjustable plates 7 and 8 adjustable. The bearings 16 and 21 are formed so as to allow the adjustment or the change of the inclination of the rollers 17-20.

The cutting and spreading device 3 not only offers the possibility to separate the supplied web 1 by cutting into four individual sheets 2.1 - 2.4 and adjust the distance between the individual sheets 2.1 - 2.4, for example, by changing the inclination of the rollers 17 - 20, but with the Cutting and spreading device 3, it is also possible to separate a supplied web 1 in only two individual webs, in which case only the central cutting device 24 is used and the two individual webs produced by cutting, for example, over the rollers 18 and 20 are guided.

Also, a separation of a train in three single tracks is possible. Usually, in this case, the middle knife is removed or taken out of engagement. For the guidance of the middle path, the rollers 18 and 20 are set so that they are aligned the same, ie have a common axis of rotation. It is also possible, notwithstanding the figure 1 with respect to the median plane M is not symmetrical, but is supplied asymmetrically to the web inlet 3.1, as indicated in Figure 1 with broken lines for the web 1a. With two cutting devices 24, the web 1a is separated into the individual webs 2.1-2.3, of which the single web 2.1 is guided around the rollers 17 and 19 and the two individual webs 2.2 and 2.3 via the rollers 18 and 20, respectively.

Of course, the cutting and welding apparatus 3 can also be used so that the supplied web 1 is uncut, i. in the form of a single web over the web outlet 3.2 is supplied to a further use. In this case, at least the rollers interacting with the web, for example the rollers 18 and 20, are adjusted so that they are oriented with their axes perpendicular to the center plane M in each case.

With 25 and 26 adjustment means are referred to, which are for example designed as eccentric and with which the bearings 21 of the rollers 17 - 20, but at least one bearing 21 each roller group 17/19 and 18/20 in the frame longitudinal direction L are adjustable, via the adjusting device 25, the bearings 21 of the rollers 18 and / or 20 and the adjustment of the bearings 21 of the rollers 17 and / or 19. To achieve this, via the adjustment 25 and 26th each adjusting the trusses 6 or frame members to which the bearings 21 are provided.

Denoted at 27 in Figure 1 are conduits which are connected to a source of pressurized gaseous fluid, for example to a compressed air source. By means of rotary connectors, the lines 27j are connected to roller channels formed in the rollers 17-20 which, in turn, communicate with a multiplicity of exit or nozzle openings 28 on the circumferential or circumferential surface of the rollers 17-20. During operation of the cutting and spreading device 3, the webs 2.1 to 2.4 are blown in from the inside by the fluid emerging from the nozzle orifices 28, whereby the friction between the respective web and the rollers cooperating therewith and the tension on the webs cut single tracks 2.1 - 2.4 reduced.

The main features and advantages of the cutting and spreading device can be summarized as follows:

> The cutting and spreading device 3 makes it possible to produce two, three or four webs from a fed web 1 by cutting and also to supply the supplied web 1 uncut for further use.

> Due to the adjusting device formed by the adjusting plates 7 and 8 and the adjusting 25 and26 not only an angular adjustment of the rollers 17 - 20 with respect to the median plane M possible, but also an adjustment of these rollers in the longitudinal direction L of the device frame 4 and thus an adjustment The particular track length within the cutting and spreading device 3. In particular, this is an adjustment in the way possible that the present in the cutting and spreading device 3 length of the individual sheets 2.1 - 2.4 is exactly the same, which is particularly in the

Processing of webs 1 in the form of printed packaging films or shrink films is of great importance.

> Another advantage of the cutting and spreading device 3 consists in its compact design and in that in particular by the free accessibility of the rollers 17 - 20 insertion of the respective web-like sheet material with relatively little effort is possible, as well as a change between a two-lane , three-lane and four-lane cutting of the fed web 1. > Regardless of the number of webs produced by cutting, the flat material is only guided over a few rollers or deflection axes. This results in not only a robust construction, but also a slight pull on the cutting and spreading device 3 at the web exit 3.2 led away single lanes 2.1 - 2.4.

> Another significant advantage is that even at the web outlet 3.2, the individual lanes 2.1 - 2.4 lie in a common plane, resulting in a substantial simplification of subsequent facilities for processing the single lanes.

> By the driving connection, at least between the mutually associated adjusting plates 7 and the mutually associated adjusting plates 8, a co-directional parallel adjustment of the rollers 18 and 20 or 17 and 19 is achieved, with the advantage of a simplified adjustability of the cutting and spreading device. 3

The invention has been described above by means of an embodiment. It is understood that numerous changes and modifications are possible without thereby departing from the inventive concept underlying the invention.

LIST OF REFERENCE NUMBERS

1 sheet of flat material

2.1 - 2.4 single tracks created by cutting

3 cutting and spreading device

3.1 Railway entrance

3.2 Bahnauslauf

4 device frame

5 frame element

6 traverse

7, 8 adjustment plate

9 leadership role

10 slot

11 guide pin

12 slot

13, 14 toothing 15 coupling plate

16 bearings

17-20 roll

21 Bearing 22 Back-up roll

23 traverse

24 cutting device

25, 26 adjusting device

27 line 28 nozzle opening on the lateral surface of the rollers 17 - 20

A feed direction of the web 1 or single webs 2.1 - 2.4

L Device longitudinal axis

M vertical median plane

Claims

claims

1. Cutting and spreading device for cutting a web inlet (3.1) of the device (3) supplied web (1. 1a) of a packaging material in a plurality of at a web outlet (3.2) of the device (3) away conveyed and spaced individual tracks (2.1 - 2.2 ), characterized in that on the web inlet (3.1) or on a local cutting station (24) in a device longitudinal axis (L) following a plurality of rollers (17 - 20) are rotatably provided that the rollers (17 - 20) roll groups, respectively at least two rollers (17, 19 or 18, 20) form that adjusting means are provided (7, 8) for adjusting the inclination of the rollers (17 - 20) and their axes with respect to one for all rollers (17, 20 ) Common reference plane (M), for example, with respect to a vertical or substantially vertical reference plane (M).

2. Apparatus according to claim 1, characterized in that the number of roller groups is equal to the number of maximum with the device can be generated by cutting single lanes (2.1 - 2.4).

3. Apparatus according to claim 1 or 2, characterized in that the cutting station at the web inlet (3.1) of a plurality of cutting tools or cutting elements (24) is formed.

4. Device according to one of the preceding claims, characterized in that at least one roller (18, 19) of each roller group or their bearings (16, 21) in the direction of the device longitudinal axis (L) or in the web or conveying direction is adjustable.

5. Device according to one of the preceding claims, characterized in that the reference plane (M) a plane perpendicular to the plane of the supplied web (1) and / or perpendicular to the plane of at least one of the device at the web outlet (3.2) discharged web (2.1 - 2.4).

6. Device according to one of the preceding claims, characterized in that it is at least in terms of the rollers (17, 18, 20) and their orientation mirror-symmetrical to a median plane (M), for example, to a reference plane forming the median plane (M) is formed.

7. Device according to one of the preceding claims, characterized in that the rollers (17, 19, 18, 20) of each roller group are jointly adjustable, and preferably such that the rollers (17, 19, 18, 20) of each roller group in each position of the adjustment are each arranged parallel or substantially parallel to each other.

8. Device according to one of the preceding claims, characterized in that the rollers (17, 18) between a position in which they are oriented with their axes perpendicular to the reference plane (M) and positions are adjustable, in which the axes of the rollers ( 17, 20) with the reference plane (M) einschießen an angle smaller than 90 °, which opens to the web outlet (3.2) out.

9. Device according to one of the preceding claims, characterized in that the rollers (17, 20) with an outer roller end in each case on an outer bearing (16) in the region of an outer frame member (5) and with their inner ends to a respective inner bearing (21) are mounted, and that adjusting means (7, 8; 25, 26) are provided with which at least the position of the outer bearing (16) is variable to change the inclination of the rollers (17, 20).

10.Vorrichtung according to any one of the preceding claims, characterized in that the rollers (17, 20) with an outer end of each roll on an outer bearing (16) in the region of an outer frame member (5) and with their inner ends to a respective inner bearing (21) are mounted, and that at least one adjusting device (24, 25) is provided, with which the position of at least one inner bearing (21) is adjustable.

11.Vorrichtung according to any one of the preceding claims, characterized in that each roller group comprises two rollers (17, 19, 18, 20).

12. Device according to one of the preceding claims, characterized in that four roller groups are provided, and preferably in each case two groups of rollers on both sides of a median plane (M) of the device.

13. Device according to one of the preceding claims, characterized by means (27, 28) for acting on the web material (1, 2.1 - 2.4) with a gaseous fluid in the region of the rollers (17, 20) on its side facing the respective roller surface side.

14. Device according to one of the preceding claims, characterized by its design as a component or additional aggregate of a packaging station.