DE102014113393A1 - Method and device for producing packaging containers - Google Patents

Abstract

Method and device for producing packaging packages by at least single-layer, preferably multi-layer wrapping each of a packaging group composed of at least two packages with at least one film on a treatment line through which the respective packaging group is moved for wrapping with the film in a transport direction.

Description

The invention relates to a method according to the preamble of claim 1 and to a device according to the preamble of claim 15.

Basically, the production of packaging containers takes place in such a way that in each case a plurality of packages are assembled into a packaging group, in which the packages close together, and that the respective packaging group is then wrapped or enclosed with a film. Known methods generally use shrink films which reduce their dimensions by applying heat in a shrink tunnel in such a way that the film applies stress to the packaging of the respective packaging group and thus fixes it. The disadvantage here is, inter alia, that such shrink films are relatively thick and expensive, and that caused by the respective shrink tunnel high investment costs and by the heat required for the shrinkage very high operating or energy costs.

To avoid these disadvantages, it is also known to use a stretch film as film in the production of containers ( WO 2011/024050 ), which is under bias (film tension) at least one layer, but preferably several layers wrapped around the respective container group, so that packaging containers are obtained with sufficient stability despite the use of a very thin and therefore inexpensive film. The use of stretch film eliminates the need for a shrink tunnel and the associated high investment and operating costs.

The disadvantage, however, in principle that with the known methods or with the known devices only insufficient performance (number of packaging containers produced per unit time) can be achieved, in particular because of the lack of continuous movement of the packaging groups through the treatment section even during the wrapping of the Packing groups with the foil.

The object of the invention is to provide a method by which the production of packaging containers with increased performance (number of packaging containers produced per unit time) is possible. To solve this problem, a method according to claim 1 is formed. An apparatus for carrying out the method is the subject of patent claim 15.

A special feature of the invention is that the packaging groups are moved continuously during wrapping with the at least one film and without stopping in a transport direction. As a result, a high performance can be achieved with gentle treatment of at least one film and high reliability. Preferably, the packaging groups are held on packaging grippers, but otherwise ground-free, i. without getting up on other machine elements, e.g. moved on transport elements, guides when wrapping with the at least one film in the transport direction, for example between a receiving position for receiving the packaging groups and a dispensing position for dispensing the wrapped packaging groups, which usually when using a stretch film already forming the packaging container or when using a Shrink film are fed to a shrink tunnel.

The film used in the method according to the invention is, for example, a shrink film or a stretch film, preferably a thin-walled stretch or shrink film, wherein at least the stretch film is preferably applied to several layers when wrapping the respective packaging group.

Before the wrapping of the respective packaging group with the at least one film, the packaging group is first of all brought together with the film and a film end is applied to the respective packaging group by withdrawing the film drawn from a preferably stationary film supply or a local film supply.

In a general embodiment of the invention, this merging and application takes place in that a film end, preferably the foil end leading to film removal from the film supply, is fixed to the respective packaging group, for example by gluing using an adhesive application, for example a self-adhesive application or a double-sided application tape.

In a further general embodiment of the invention, for the bringing together of the film with a packaging group, the film is removed from the preferably stationary film feed in such a way that it intersects the transport path or movement path on which the packaging groups are moved in the transport direction for producing the packaging bundles. For this purpose, the film is moved with a film end, preferably with a leading end of the film, to a provision position which is located on the side of the movement path opposite the film feed. In the thus positioned film, the packaging group to be wrapped is moved in, so that the film finally the packaging group on at least three sides, ie based on the transport direction leading side and also more or less at two parallel to the transport direction oriented side encloses. Subsequently, a film end is applied to the packaging group and this is then set for wrapping in rotation.

The film tension required for wrapping the respective packaging group is basically generated either by the force or tension required to remove the film from the film feed, or at increased output (number of produced packaging bundles per unit time), at which a film length required for wrapping already exists is separated before the complete wrapping of the film supply or the local film supply, by Folienrückhalte- or holding means which act on the wrapping when not yet applied to the respective packing group Folienteillänge and / or hold them at one end of the film.

The film supply of the film supply is formed by a film roll. Since this has a relatively large mass, it is desirable that the film roll rotates during operation with the most constant rotational speed, but in any case this strong acceleration can be avoided. Since, however, the film can not be removed from the film feed at a constant speed, the film feed preferably has at least one buffer for the film.

"Packaging" are within the meaning of the invention filled with a product packaging, for example in the form of cans, bottles, especially in the form of plastic or PET bottles. For the purposes of the invention, "packaging groups" are groups which are each composed of several packages.

The term "substantially" or "approximately" or "approx." In the context of the invention means deviations from the exact value by +/- 10%, preferably by +/- 5% and / or deviations in the form of for Function insignificant changes.

Further developments, advantages and applications of the invention will become apparent from the following description of exemplary embodiments and from the figures. In this case, all described and / or illustrated features alone or in any combination are fundamentally the subject of the invention, regardless of their summary 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 exemplary embodiments. Show it:

1 in schematic representation and in plan view an apparatus for producing packaging containers according to the invention;

2 - 4 in a schematic functional representation and in side view, the device of 1 in different operating states;

5 a representation like 1 in a further embodiment of the device according to the invention;

6 and 7 in a schematic representation and in side view, the device of 5 and a modified embodiment of this device;

8th - 12 in each case in a schematic representation and for example in side view further embodiments of the device according to the invention.

The in the 1 - 4 generally with 1 designated device is used to produce packaging containers 2 by wrapping packaging groups 3 , each of a plurality of packaged to the respective packaging group packaging 4 exist, with a film, in particular plastic film, such as stretch or shrink film. In the illustrated embodiment, each packaging group contains 3 a total of twelve packages 4 , Of course, the number of packaging 4 per packing group 3 also deviate from this.

The device 1 includes a transporter 6 , on its horizontal or substantially horizontal transport plane, the packaging 4 are fed in a transport direction A, as a four-lane packaging stream, from which then in the manner known to those skilled packaging groups 3 be separated, in which the packaging 4 are provided close to each other fitting. The transport direction A extends in a longitudinal axis L of the conveyor 6 , Q is a transverse axis which is perpendicular or substantially perpendicular to the transport direction A and in the embodiment of the 1 - 4 parallel or substantially parallel to the transport plane of the transporter 6 is oriented.

On the conveyor 6 is used to make the packaging containers 2 every packing group 3 at a pickup position I each of two packaging grippers 7 or from their gripper heads 8th captured and between these gripper heads 8th , which are in the direction of the transverse axis Q opposite each other at the feed dog 6 are provided, clamped in the raised state, ie ground-free by the device 1 emotional. To the gripper heads 8th are the ones in the respective packing group 3 external packaging 4 by additional support elements 8.1 supported. With the packaging grippers 7 the respective packing group arrives 3 initially to a film transfer 9 a fixed film feeder 10 , At the film transfer 9 is a leading or anticipatory foil end 5.1 the one from a supply 10.1 (Original or film roll) of the film feeder 10 withdrawn film 5 ready and will suitably with the packing group 3 brought together and fixed to this, for example, with a self-adhesive application. This merging and fixing takes place, for example, in that at the film transfer 9 the respective packing group 3 with the packing grippers 7 briefly lowered while, for example, with its bottom on the there ready and provided for example with the adhesive film end of the film 5.1 is discontinued, so that the film 5 with this end at the packing group 3 liable.

Alternatively, it is also possible to use the respective packing group 3 already then with the leading end of the film 5.1 while the packaging group is still standing with its bottom on a conveyor. It is possible, for example, the end of the film 5.1 initially below the transport plane of the transporter 6 to position, and this only further to promote, if the packing group 3 above the end of the film 5.1 located. Corresponds then the conveying speed of the film end 5.1 the speed of the packing group 3 , so the end of the film is 5.1 in the correct position and wrinkle-free below the packaging group 3 arranged and connected to this.

The packing group 3 comes with the packing grippers 7 moved in the transport direction A, and then under rotation or rotation of the gripper heads 8th and thus also the packaging group 3 around a gripper head axis GA oriented in the direction of the transverse axis Q.

The following is therefore the leading end of the film 5.1 always when removing the film 5 from the film feeder 10 or from the stock 10.1 leading end of film. The rear end of the film 5.2 Accordingly, below is always the film end of this film length produced when separating the respective film length.

Through the movement of the packaging gripper 7 in the transport direction with simultaneous rotation of the gripper heads 8th and the packaging group 3 around the transverse axis is the film 5 increasingly from the film feeder 10 deducted. Once for the preferably multiple wrapping the packing group 3 required film length is deducted, this is by means of a cutting or separating device 11 from the rest of the film supply 10.1 separated, so then with the further rotation of the gripper heads 8th around its common axis GA the entire separated length of film on the packaging group 3 wrapped and in particular the trailing end of the film 5.2 against the packing group 3 is created, for example, by brushing using not brushed elements. In spite of the separation of the length of film from the film supply, a tight wrapping of the packaging group 3 with the foil 5 , ie to achieve the necessary film tension, takes place in the device 1 the wrapping of the packing group 3 above a transport direction A on the film transfer 9 following sliding or grinding sheet or machine table 12 , which on its top a variety of vacuum openings 13 which does not yet affect the packaging group 3 wound part length (Folienschleppe) and in particular also the trailing end of the film 5.2 rest and thereby be retained to produce the film tension. Alternative to the machine table 12 with the vacuum openings 13 can also find a work table with at least one vacuum belt use. In this case, it is also possible to drive the vacuum belt with its own conveying speed, so that in this way the film tension can be easily adjusted and / or varied. Also by changing the vacuum or the negative pressure adjustment of the film tension is possible.

The finished packaging container 2 will then be at a dispensing position VIII with the two packing grippers 7 on a in the transport direction A to the machine table 12 subsequent transporter 14 discontinued and by lateral moving away at least the gripper heads 8th released in the direction of the transverse axis Q for removal in the transport direction A. In this way or moving apart of the gripper heads 8th also become the support elements 8.1 laterally out of the respective packaging container 2 moved out.

To the film roll 10.1 , which may have a significant mass, not permanently accelerate and decelerate, it is advantageous to provide a dancer or buffer system, as it 2 with the roles 15 is indicated. The film roll, driven at a constant or essentially constant speed, conveys the film 5 then in this example designed as a dancer system buffer system. During the merging of the film 5 with the respective packaging group 3 Initially, only a small film length is required, so that the film supply increases in the buffer system or in a local buffer memory. Subsequently, wrap the wrapping group 3 With the foil 5 a, while maintaining the movement in the transport direction A, there is a peeling off of the film 5 from the film feeder 10 with increased speed, which is then completely provided from the buffer memory. Is that for wrapping the current packing group 3 required length of film from the film feed 10 withdrawn and separated from the film supply, the film requirement initially decreases significantly again, so that the buffer memory at constant or substantially constant rotational movement of the supply reel 10.1 can be replenished. This also causes an unnecessary burden on the film 5 avoid and ensure that a possible uniform, but especially at least abrupt acceleration avoiding deduction of the film 5 from the film supply 10.1 takes place, although a uniform deduction of the film 5 from the film feeder 10 not possible. By using the buffer system with a dynamic buffer or dancer system, it is thus possible to keep the unwinding speed of the film roll during operation almost constant, but at the same time by the buffer system different rates of decrease of the film 5 from the film feeder 10 possible are. Proper feeding of the film 5 at the film transfer 9 is monitored with a sensor.

The slide feeder 10 is located below the transport path of the packaging grippers 7 held packaging groups 3 and, for example, continues to be designed so that the film 5 to the performance of the device 1 adjusted with variable speed can be handled and / or changing the direction of rotation of the film supply 10.1 forming supply roll is possible so as to be able to wind up a withdrawn or unwound length of film again.

The feeding of the film 10 to the film transfer 9 takes place, for example, via a feed or guide shaft ending at this position, with the assistance of conveyor rollers.

The cutting device is preferably provided on the feed chute or within the feed chute.

The adhesive application is applied to the leading end of the film, for example, by a dispenser for spray adhesive. In principle, the adhesive application can also be realized by a double-sided adhesive tape.

The gripper heads 8th are preferably individually controllable and / or controllable in terms of their rotational movement, but in such a way that the gripper heads 8th the two the respective packing group 3 clamping packaging gripper 7 of course synchronously and in the same direction of rotation and with the same rotational speed.

Like in the 8th with the solid line 16 shown, the packaging gripper 7 each on a closed circuit 16 moved, on an orbit in a direction perpendicular to the Greifkopfachse GA oriented plane.

On a partial length of the round 16 between the shooting position I and the delivery position VIII the movement of the gripper heads takes place 8th in transport direction A. The further partial length of the circulation 16 between the delivery position VIII and the recording position I forms the return for the packaging gripper 7 , Furthermore, these are at least between the task position I and the delivery position VIII moves so that in the transverse direction Q in each case two forming a pair of packaging gripper 7 opposite, and indeed at achsgleicher arrangement of their Greiferkopfachse GA. The respective circulation 16 is formed by a leadership. The movement of the packaging gripper 7 on the circulation 16 For example, in each case by a mechanical drive system, for example via chains and / or wheels, but in a preferred embodiment by an electric linear drive in such a way that the respective circulation 16 forming guide provided with a stator of the linear drive or is designed as a stator of the linear drive and the packaging gripper 7 are each designed as a movable element (runners) or mover of the linear drive. At the for the 2 - 4 Selected representation, the movement of the packaging gripper takes place 7 on the circulation 16 in the counterclockwise direction.

The training of the rounds 16 As electric linear drives also opens up the possibility of the individual packaging gripper 7 each circulation according to the needs to control separately, but each in the form that at least between the receiving position I and the delivery position VIII two packaging grippers each 7 coaxially with their axes GA face each other.

The 5 and 6 show as a further embodiment a device 1a that differ from the device 1 characterized in that for generating the film tension when wrapping the respective packaging group 3 two contact elements 17 provided in the form of pressure rollers, which are not yet on the packaging group 3 wound part length of the film 5 (Foil tow) against the top of the sliding or grinding sheet or the machine table 12 presses. The machine table 12 here has the vacuum openings 13 not on, but is performed on its upper side, for example, with an increased coefficient of friction, for example, rubberized, etc. The pressing elements 17 are in this embodiment, in each case on a pivoting arm 17.1 the packaging gripper 7 provided, in such a way that they in the transport direction A between the two packaging grippers 7 clamped packing group 3 lag and despite the rotation of the gripper heads 8th around her Greiferkopfachsen GA constantly against the not yet wound part of the length of the film 5 issue. The pressing elements 17 be with the packaging grippers 7 in orbit 16 moved.

The pressing elements 17 For example, braked rotatable rollers made of rubber. The contact pressure of the pressing elements 17 is generated, for example, by its own weight and / or by spring elements.

The effect of the pressing elements 17 based in particular on the speed of the film 5 when winding on the respective packaging group 3 greater than the transport speed of the packing group 3 in the transport direction A, so that there is a relative speed between the film 5 and pressing element 17 results in the desired bias of the film 5 leads. Instead of the machine table 12 can also be provided an abrasive sheet or rubber band.

The 7 shows a further embodiment of a device 1b that differ from the device 1a differs in that for the pressing elements 17 a separate circulation 18 is provided.

The 8th shows a schematic representation and for example in side view of a device 1c for producing the packaging containers 2 by wrapping the packing groups 3 with the foil 5 , again using the on the circulation 16 moving packaging gripper 7 , of which in each case two pairs arranged opposite each other, the respective packaging group 3 keep clamped and during transport in the transport direction A for easy or preferably, but multiple wrapping with the film 5 rotate around the gripper head pockets GA.

The device 1c points in addition to the circulation 16 further rounds 19 . 20 and 21 in turn, in planes perpendicular or substantially perpendicular to the Greiferkopfachsen GA of the gripper heads 8th the packaging gripper 7 are arranged, namely the circulation 19 for movers or foil grabs 19.1 , the circulation 20 for movers or foil grabs 20.1 and the circulation 21 for several movers or foil grippers 21.1 , The foil gripper 19.1 . 20.1 and 21.1 are each preferably formed so that they are suitable for gripping the film 5 on a sufficient film width in the direction perpendicular to the plane of its circulation 19 . 20 respectively. 21 extend. The arrangement is further made such that in the transport direction A on the circulation 19 the circulation 20 follows and the circulation 21 below the rounds 19 and 20 and below the trajectory of between the packaging grippers 7 clamped packaging groups 3 is arranged. Furthermore, the film gripper move 19.1 on the circulation 19 and the foil gripper 20.1 on the circulation 20 in the same direction as the packaging gripper 7 on the circulation 16 , ie at the for the 8th selected representation in the counterclockwise direction. On the round 21 move the local film gripper 21.1 in one of the circulation direction of the circulation 16 opposite direction, ie at the for the 8th selected representation in a clockwise direction, so that the slide gripper 19.1 and 20.1 on the directly adjacent and transverse or perpendicular to the transport direction A extending partial lengths of the circulations 19 and 20 in opposite directions and the film gripper 21.1 in the same direction with the foil grippers 19.1 and 20.1 on the circulation 21 adjacent partial lengths of the rounds 19 and 20 move.

For producing the packaging containers 2 become the packing groups 3 again via the transporter 6 conveyed in the transport direction A and then at the transfer or recording position I from a pair of packaging grippers 7 captured and between their gripper heads 8th clamped. For wrapping the packing group 3 gets from one of the slide gripper 19.1 at the film delivery 10 the free leading foil end 5.1 the foil 5 Captured and subtracted from the film supply 10 with this foil gripper 19.1 on the transversely or perpendicular to the transport direction A extending part length of the circulation 19 to a deployment position II moved so that the on the film gripper 19.1 held vertical or substantially vertical partial length of the film 5 in the trajectory of the gripper heads 7 covered, to be wrapped packing group 3 is located and this from the shooting position I in the transport direction A promoted packing group 3 in the vertical part length of the film 5 can move in, which is the movement space of the packaging groups 3 cutting between the film feeder 10 and the deployment position II extends. The foil gripper 19.1 passes the end of the slide 5 to a waiting foil gripper 21.1 (Position III ), so that's the packing group 3 already at least on one side covering film 5 between a foil gripper 20.1 and a foil gripper 21.1 is held. The foil gripper 21.1 then takes over even after separating the required length of film from the film supply 10.1 the rear end of the film 5.2 , where both foil gripper 19.1 and 21.1 the foil 5 or keep the separated foil length to tension. The wrapping of the respective packing group 3 by rotating the gripper heads 8th in order to her Greiferkopfachse GA takes place again in the transport direction A. packaging grippers 7 , Here are the holding the ends of the film length film gripper 20.1 and 21.1 for example, moves so that the film gripper 20.1 relative to the film gripper 21.1 in the transport direction A catching up and the leading end of the film 5.1 under the at the packing grippers 7 held packing group 3 moves and this end of the film finally releases, for example after at least three-sided investment of the film to the packaging group 3 , Especially after the end of the film 5 in the gusset between the bottom of the packing group 3 and the second, still on the film gripper 21.1 held foil end (position VI ). Subsequently or at the same time hereby begins the actual wrapping or the actual rotation of the gripper heads 8th around their Greiferkopfachse GA for single-layer or multi-layer wrapping, in one of the circulation 16 corresponding direction of rotation, ie at the for the 8th selected representation in the counterclockwise direction. After multiple rotation of the packing group 3 (Position VII ) then takes the release of the manufactured packaging package 2 at the delivery position VIII , and indeed for the removal of the packaging package 2 about the transporter 14 eg to a palletizer.

In a device 1c with reduced performance (number of packaging containers produced per unit time 2 ) there is also the possibility to circulate 21 and the film gripper there 21.1 to dispense and the film tension when wrapping the packing group 3 first by peeling off the film from the film supply 10.1 However, what then means that with the application of the film 5 on a following in the transport direction A packing group 3 can only be started if after the complete or almost complete wrapping the preceding in the transport direction A packing group 3 the foil 5 from the film supply 10.1 or from the slide delivery 10 was separated.

The 9 shows the device 1c in a different way of working, which differs from that mentioned above in connection with the 8th only differs in that prior to the start of the actual rotary or rotary movement of the gripper heads 8th for wrapping, first the rear foil end 5.2 the separated length of film from the film gripper 21.1 to the packing group 3 For example, to the bottom of the packaging group 3 created and then released. By turning the packaging gripper 7 against the circulation direction of the circulation 16 ie clockwise will be the packing group 3 with the foil 5 wrapped, the film tension first by the leading end of the film 5.1 still holding foil gripper 20.1 is generated until finally this end of the film from the film gripper 20.1 is released to the film completely on the packaging group 3 to wind up (positions VI and VII of the 9 ).

The 10 shows a further embodiment of a device 1d that differ from the device 1c essentially only different in that the two rounds 19 and 20 to a round 22 summarized or combined, on which the film gripper 22.1 move, in a circumferential direction, which is equal to the direction of rotation of the packaging gripper 7 on the circulation 16 is, ie at the for 10 selected representation in the counterclockwise direction.

The deployment position II and the film transfer III are simulated by the fact that the circulation 22 with a section 22a is provided, on which the film gripper 22.1 the movement space of the packaging groups 3 and the packaging gripper 7 cutting at the for the 10 initially selected up to the position II / III and from there turn down, so that each of a slide gripper 22.1 recorded leading end of film 5.1 with the relevant film gripper 22.1 is first moved upward and thereby held at this end of the film part of the length of the film 5 vertically or substantially vertically in the movement space of the packaging groups 3 located.

The production of packaging containers 2 is analogous to that in connection with the 9 described method, ie the respective on the conveyor 6 Promoted packing group 3 will be at the pickup position I between the two packaging grippers 7 clamped and then by the on the film gripper 22.1 held, the trajectory of the packing group 3 cutting foil 5 moved through (position IV ), wherein the film tension between the leading end of the film 5.1 holding foil gripper 22.1 and a foil gripper 21.1 of the circulation 21 is maintained, even after the separation of the film length of the stock 10.1 , For further in the transport direction A moving packaging grippers 7 the foil grab is approaching 22.1 increasingly the film gripper 21.1 on (position V ), which finally the rear foil end 5.2 releases after it has been placed against the underside of the packing group 3 , Subsequently, according to the position VI the complete wrapping of the packing group 3 with the foil 5 , wherein first with the front end of the film 5.1 holding foil gripper 22.1 the necessary film tension is maintained, the film gripper 22.1 but finally releases the foil (position VII ). The packaging gripper 7 or their gripper heads 8th rotate when wrapping in one of the circulation direction of the circulation 16 opposite direction of rotation, ie in the representation of the 10 clockwise.

The 11 shows a further embodiment of a device 1e that differ from the device 1c and 1d it differs in that instead of the film gripper 20.1 respectively. 22.1 sheet grippers 23 are provided for example in the form of film holding fingers. Each foil gripper 23 is pivotable on a packaging gripper 7 arranged, in such a way that by pivoting the respective film gripper 23 from a starting position into a clamping position, the film 5 between the foil gripper 23 and the rapier head 8th is held.

In detail, the respective with the transporter 6 Promoted packing group 3 at the pickup position I between the two packaging grippers 7 clamped and then in the direction of transport A to the movement path of the packing groups 3 cutting and with her leading end of film on a film gripper 19 held and to the position II / III moving foil 5 promoted. By pivoting the on the packaging grippers 7 provided film gripper 23 and then releasing the leading end of the film 5.1 from the film gripper 19.1 becomes the leading foil end 5.1 on the gripper heads 8th fixed. With the movement of the packaging gripper 7 in the transport direction A, the film 5 from the film feeder 10 withdrawn and finally separated, with the required film tension by clamping between the film grippers 23 and a foil gripper 21.1 is produced. By rotating the gripper heads 8th about its gripper head axis GA in one direction of rotation, the direction of rotation of the circulation 16 corresponds, ie counterclockwise the film while maintaining the film tension by the film gripper 21.1 held foil end increasingly on the packaging group 3 wound up (positions V - VII ), until finally the film gripper 21.1 the film releases, so that then also released from the packaging gripper packaging container 2 about the transporter 14 can be removed.

The 12 shows a schematic representation of another embodiment of a device 1f that differ from the device 1e this distinguishes that on the circulation 21 and the film gripper there 21.1 is omitted and the film tension when wrapping on the packaging grippers 7 clamped packaging groups 3 through the on the circulation 18 circumferential pressure elements 17 is generated, which is not yet wound and already separated from the film supply film length (foil tow) against the top of the machine table 12 or press a sanding sheet.

The pressing elements 17 are, for example, again braked rotatable rollers made of rubber. The contact pressure of the pressing elements 17 is generated, for example, by its own weight and / or by spring elements.

It was assumed above that the film is a stretch film. As a foil 5 Shrinkable films are also suitable, the device 1 . 1a - 1f then additionally has a shrink tunnel, the packaging groups 3 after wrapping with the foil 5 be supplied.

All embodiments of the invention have in common that the packaging groups 3 when wrapping with the foil 5 be continuously moved without stopping in the transport direction A, ie, an operation of the device 1 . 1a - 1f with continuous movement without stopping the packing groups 3 through the device and the packaging container 2 out of the device. This is gentle treatment of the film 5 and high reliability a high performance achievable. Common to all devices according to the invention and in particular the devices 1 . 1a - 1f Furthermore, that of the packaging grippers 7 covered packing groups 3 bottomless, ie without getting up on transport elements, guides, etc. between the receiving position I and the delivery position VIII be moved and in this case by the course of the trajectory of the packaging gripper 7 , in particular by the course of the circulation 16 the trajectory of the packaging groups 3 adapted to the respective needs.

The devices 1 . 1a and 1b is common that the first merging and joining the film 5 with the respective packing group 3 by fixing, for example by sticking the leading end of the film 5.1 he follows. The devices 1c - 1f is common that the first merging and joining the film 5 with the respective packing group 3 characterized in that this on the packaging grippers 7 clamped packing group is in the movement path of this packing group 3 cutting, for example vertically extending film 5 inside moves.

All embodiments of the invention and also the devices 1 . 1a - 1f is common that when higher performance is required for the production of the respective packaging 2 necessary film length of the film feed 10 separated as soon as possible and thereby the necessary film tension by Folienrückhalte- or holding elements, ie by the vacuum openings 13 having machine table 12 , by the pressing elements 17 , through the foil gripper 20.1 . 21.1 or 22.1 is generated, and that if a reduced power is sufficient, these film retaining or holding elements can be dispensed with and the required film tension by pulling off the film 5 from the film feeder 10 necessary force is generated.

Through the foil holding or retaining means can be achieved by maintaining the film tension until or almost until the end of the winding advantageous and visually appealing results. In particular, this is due to the strength of the packaging packaging produced 2 increased since the packaging 4 through the stretched film 5 (Stretch film) are biased against each other stronger and abut the individual turns of the film with increased friction values together.

To the application of the lagging when wrapping foil end of the packaging container 2 To improve, it may be basically useful in the inventive method to provide this end of the film with a self-adhesive application.

The rounds 18 . 19 . 20 . 21 and 22 are each formed by at least one guide, for example, two parallel guides. The drive of the pressing elements 17 and / or the film gripper 19.1 . 20.1 . 21.1 and 22.1 takes place, for example, mechanically, for example via drive chains and / or wheels, preferably by a respective linear drive whose stator is formed by the respective guide or provided on this, wherein the pressing elements 17 and / or the film gripper 19.1 . 20.1 . 21.1 and 22.1 provided on runners or movers of the respective linear drive or are formed. In particular, there is the possibility that at each circulation 19 . 20 and 21 the foil gripper 19.1 . 20.1 and 21.1 be moved independently of each other according to the respective requirements.

A fundamental advantage of the device according to the invention, irrespective of the particular embodiment, is basically that an extremely thin film is used to save material 5 can be used.

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

So it is with the devices 1c - 1e at least advantageous, each first to a packaging group 3 applied foil end of the film 5 to fix on this packaging group, for example by an adhesive application on the film 5 or the respective packing group 3 is applied, for example, as a double-sided adhesive tape.

LIST OF REFERENCE NUMBERS

1, 1a-1f

 contraption

2

 container size

3

 packaging group

4

 packaging

5

 foil

5.1, 5.2

 Ribbon end

6

 carrier

7

 packaging gripper

8th

 gripper head

8.1

 Supporting or retaining element

9

 Foil transfer

10

 film feed

10.1

 Foil supply or film roll

11

 separating device

12

 Machine table or abrasive sheet

13

 vacuum port

14

 carrier

14.1

 delivery position

15

 role

16

 circulation

17

 presser

17.1

 swivel arm

18

 circulation

19, 20, 21

 circulation

19.1, 20.1, 21.1

 sheet grippers

22

 circulation

22a

Section of the round 22

22.1

 sheet grippers

I

 pickup position

II

 Ready position

III

 Foil transfer

IV-VII

 position

VIII

 delivery position

A

 transport direction

L

Longitudinal direction of the device 1 . 1a - 1f

Q

 transversely

GA

Rotary or rotary axis of the gripper heads 8th

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2011/024050 [0003]

Claims (24)

Method for producing packaging containers ( 2 ) by at least single-layer, preferably multi-layer wrapping each one of at least two packages ( 4 ) packaging group ( 3 ) with at least one film ( 5 ) on a treatment line through which the respective packaging group for wrapping with the film ( 5 ) is moved in a transport direction (A), characterized in that the respective packing group ( 3 ) even during wrapping and until completely wrapping with the at least one film ( 5 ) is constantly moved in the transport direction (A) without stopping at a transport speed greater than zero. Method according to claim 1, characterized in that the respective packing group ( 3 ) for wrapping with the at least one film ( 5 ) is rotated about an axis (GA). Method according to claim 1 or 2, characterized in that the respective packaging group ( 3 ) for wrapping with the film ( 5 ) on at least one packaging gripper ( 7 ) or at least one gripper head ( 8th ) of the packaging gripper ( 7 ) is held in the transport direction (A) is moved, and that the at least one packaging gripper ( 7 ) or its rapier head ( 8th ) during movement in the transport direction (A) for wrapping packing group ( 3 ) with the film ( 5 ) rotates about a gripper head axis (GA), preferably about a gripper head axis (GA) oriented perpendicular to the transport direction (A), for example about a horizontal or substantially horizontal or vertical or substantially vertical gripper head axis (GA). Method according to claim 3, characterized in that the respective packing group ( 3 ) during movement through the treatment line and during wrapping with the film ( 5 ) between at least two packaging grippers ( 7 ) or gripper heads ( 8th ) is clamped, which are opposite to the treatment path in an axial direction parallel to the gripper head axis (GA) in pairs. A method according to claim 3 or 4, characterized in that the gripper heads for receiving the respective packaging group ( 3 ) at a receiving position ( I ) by moving in the gripper head axis (GA) to the packing group ( 3 ) and after wrapping the packing group ( 3 ) with the at least one film ( 5 ) the packing group ( 3 ) or the packaging container ( 2 ) by moving apart in the gripper head axis (GA). Method according to one of the preceding claims 3-5, characterized in that each packing group ( 3 ) only on the at least one packaging gripper ( 7 ) or on the at least one gripper head ( 8th ), but otherwise ground-free, that is moved at a distance from any machine elements, especially by any guides through the treatment section. Method according to one of the preceding claims, characterized in that before the wrapping of the respective packing group ( 3 ) with the at least one film by rotation of the packaging group ( 3 ) a merging of the packing group ( 3 ) with the film ( 5 ) and / or applying a film end to the packaging group ( 3 ) respectively. A method according to claim 7, characterized in that for the merging of the respective packing group ( 3 ) with the film ( 5 ) a foil end ( 5.1 . 5.2 ), for example a leading end of film ( 5.1 ) of a film feeder ( 10 ), preferably from a stationary film feeder ( 10 provided slide ( 5 ) at the packing group ( 3 ), whereby the respective packing group ( 3 ), for example, at a film transfer ( 9 ) on the film end ( 5.1 ) is lowered and then raised again and / or the film to be fixed end ( 5.1 . 5.2 ) to the respective packing group ( 3 ) is created. A method according to claim 7 or 8, characterized in that for the merging of the respective packing group ( 3 ) with the at least one film ( 5 ) this by peeling off a film feed ( 10 ) with a leading end of the film ( 5.1 ) preferably with a first film gripper ( 19.1 ) into a delivery position ( II ) is moved, so that the film at least with a partial length, the trajectory of the packing groups ( 3 ) and that the packaging group to be wrapped ( 3 ) in the transport direction (A) into the movement space cutting film ( 5 ), so that the film finally reaches the packaging group ( 3 ) encloses at least partially, and that after the creation of a film end ( 5.1 . 5.2 ) to the packing group ( 3 ) the wrapping of this packing group ( 3 ) is done by rotation. Method according to one of the preceding claims, characterized in that the wrapping of the respective packaging group ( 3 ) with stretched film ( 5 ), and that the film tension required for this purpose is achieved by removing the film ( 5 ) from the film feed ( 10 ) necessary tension and / or by at least one Folienrückhalte- and / or holding element ( 17 . 20.1 . 21.1 . 13 ) is generated, which on the respective, not yet wound part length of the film ( 5 ) and / or a local there The end of the film has a braking effect, preferably after the separation of a length of film required for wrapping. A method according to claim 10, characterized in that the at least one film retaining element from a vacuum opening ( 13 ) surface ( 12 ), on which the unwound part length of the film ( 5 ) slides and / or of pressing elements ( 17 ) with the respective packing group ( 3 ) or with which this packing group ( 3 ) holding gripper ( 7 ), the not yet wound part length of the film ( 5 ) against a sliding surface with a preferably increased coefficient of friction, or of film grippers ( 20.1 . 21.1 ) is formed. Method according to one of claims 9-11, characterized in that during the removal of the film ( 5 ) from the film feed ( 10 ) leading end of film ( 5.1 ) with the first film gripper ( 22.1 ) or after a transfer to a second film gripper ( 20.1 ) in the transport direction (A) with the at least one the packing group ( 3 ) holding gripper ( 7 ) is moved, and that the first film gripper ( 22.1 ) or the second film gripper ( 20.1 ) the leading end of the film ( 5.1 ) for wrapping to the packing group ( 3 ) or the at least one film ( 5 ) while wrapping to produce the required film tension. Method according to one of claims 9-12, characterized in that after removing one for wrapping the respective packaging group ( 3 ) required film length a rear end of film ( 5.2 ) of this film length of a third film gripper ( 21.1 ) is detected, which in the transport direction (A) with the at least one, the packaging group holding packaging gripper ( 7 ), and that the third film gripper ( 21.1 ) the trailing end of the film ( 5.2 ) before rotating the packing group ( 3 ) or during the rotation of the packing group ( 3 ) holds to produce the film tension as a film retaining element. Method according to one of claims 3-13, characterized in that a plurality of packaging grippers ( 7 ) and / or a plurality of first film grippers ( 19.1 . 22.1 ) and / or a plurality of second film grippers ( 20.1 ) and / or a plurality of third film grippers ( 21.1 ) each in a closed orbit ( 16 . 19 . 20 . 21 . 22 ) are moved in their respective orbit in the same direction and at the same speed or individually controlled. Device for producing packaging containers ( 2 ) by at least single-layer, preferably multi-layer wrapping each one of at least two packages ( 4 ) packaging group ( 3 ) with at least one film ( 5 ) on a treatment line, with the packing groups ( 3 ) moving through the treatment section in a transport direction (A) and rotating for wrapping packaging grippers ( 7 ) and with a drive for the movement of the packaging gripper ( 7 ) in the transport direction (A), characterized in that the drive the packaging gripper ( 7 ) during wrapping to wrap the respective packaging group ( 3 ) with the at least one film ( 5 ) is constantly moved in the transport direction (A) with a transport speed greater than zero. Apparatus according to claim 15, characterized in that the packaging gripper ( 7 ) in each case transversely or perpendicular to the transport direction (A) in pairs opposite each other for clamping a respective packaging group ( 3 ) are arranged. Apparatus according to claim 15 or 16, characterized in that the packaging gripper ( 7 ) for holding the respective packing group ( 3 ) Gripper heads ( 8th ) used to wrap the packaging group ( 3 ) with the at least one film ( 5 ) about a gripper head axis (GA), preferably about a perpendicular to the transport direction (A) oriented gripper head axis (GA) are rotationally driven by a rotary drive, wherein the rotary drives of the individual packaging gripper ( 7 ) or the pairs of packaging grippers ( 7 ) are preferably individually and independently controllable. Device according to one of the preceding claims, characterized in that the packaging gripper ( 7 ) are guided on guides in such a way that they convey the respective packaging group ( 3 ) ground-free, ie move at a distance from any machine elements of the device, especially from any guides through the treatment section. Device according to one of the preceding claims, characterized by a first film gripper ( 19.1 ) for merging the respective packing group ( 3 ) with the at least one film ( 5 ) this by peeling off a film feed ( 10 ) with a leading end of the film ( 5.1 ) into a delivery position ( II ) is movable, so that the film at least with a partial length, the trajectory of the packing groups ( 3 ) and the packaging group to be wrapped ( 3 ) into the movement space cutting film ( 5 ) is moved in. Device according to one of the preceding claims, characterized in that at least one the foil ( 5 ) to the respective packing group ( 3 ) and / or the film ( 5 ) when wrapping holding foil gripper ( 20.1 . 21.1 . 22.1 ) in the transport direction (A) with the at least one the packing group ( 3 ) holding gripper ( 7 ) is moved. Device according to one of the preceding claims, characterized by at least one film retaining and / or holding element ( 17 . 20.1 . 21.1 . 13 ) to produce the film tension necessary during wrapping. Apparatus according to claim 21, characterized in that the at least one film retaining element from a vacuum opening ( 13 ) surface ( 12 ), on which the unwound part length of the film ( 5 ) slides and / or of pressing elements ( 17 ) with the respective packing group ( 3 ) or with which this packing group ( 3 ) holding gripper ( 7 ), the not yet wound part length of the film ( 5 ) against a sliding surface with a preferably increased coefficient of friction, or by a film gripper ( 20.1 . 21.1 ) is formed. Device according to one of the preceding claims, characterized in that a plurality of packaging grippers ( 7 ) and / or a plurality of film grippers ( 19.1 . 20.1 . 21.1 . 22.1 ), each in closed or closed circulation ( 16 . 19 . 20 . 21 . 22 ) are moved, by a mechanical drive, preferably by an electric linear drive. Device according to one of the preceding claims, characterized by a film feed ( 10 ) for providing the at least one film ( 5 ) by peeling off a film roll, wherein the film feed ( 10 ) at least one buffer system ( 15 ) for the film ( 5 ) which, in the case of a continuous or substantially continuous removal of the film from the film roll, causes a discontinuous release of the film ( 5 ) on the film feeder ( 10 ).

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