DE20209571U1 - Device for feeding wrapped packaging material - Google Patents

Description

The invention relates to a device for feeding wound packaging material according to the preamble of claim 1 and to a machine with such a device.

The device and the machine are particularly suitable for packaging machines that preferentially process films.

Feeding devices for rolled-up films or other packaging materials are known from the prior art, in which a main roll unwinding with a first roll rotation axis is provided. The rolled-up packaging material is preferably unrolled in cycles and fed to a further processing machine. At the end of the roll, a new web of packaging material, which is also rolled up on a roll, is welded, glued or otherwise connected to the previous packaging material so that the further processing machine can produce without a long interruption.

Changing the rolls and maintaining the main roll unwinder can sometimes be very laborious, as the main roll unwinder is located underneath a machine bed and is difficult to access.

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Hanover: Freundallee 13 Braunschweig: Theodor-Heuss-Straße 1

D-30173 Hanover ^ ^ _{# #} D-.381^2 Brunswick

...BurviesrepuWik pent^pdland.··..·*. i J ·· ; Federal Republic of Germany

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Due to the high weight of the packaging material rolls, this leads to considerable strain on the people working on such a machine.

Based on this prior art, the invention is based on the object of providing a feeding device for a further processing machine, a further processing machine and an operating method for such a machine, by means of which the operating comfort is increased and the maintenance and set-up costs are reduced.

According to the invention, this object is achieved by a device having the features of claim 1 and a machine having the features of claim 11. Advantageous further developments and embodiments are specified in the respective dependent subclaims.

The movable bearing of the entire main roll unwinder parallel to the first roll rotation axis enables easy roll changing and easy access to the mechanical and electrical parts of the main roll unwinder, so that the device and a machine with such a device can be easily adjusted. The main roll unwinder comprises at least one frame that carries the main roll of packaging material, with rollers or the like arranged on the frame in order to be able to move the frame together with the main roll and any pivoting device for the main roll that may be present. In addition to bearing on rollers, a plain bearing can also be provided. An air cushion bearing can be installed for special applications.

Advantageously, a residual roll unwinder is provided with a second roll rotation axis, which also runs parallel to the roll rotation axis of the main roll unwinder and is mounted so that it can move in this direction. The residual roll unwinder also has a frame on which rollers are arranged, which run in guide rails. The residual roll unwinder carries packaging material rolls that have mostly been unwound and thus forms a second storage location, so that the main roll unwinder can either be serviced during operation or replaced with a new one.

en packaging material roll can be loaded. The movable storage of the remaining roll unwinding also enables easier accessibility and easier maintenance and, if necessary, adjustment of the machine equipment when changing the material or format of the packaging material. 5

Advantageously, the device also has a connecting unit for connecting the packaging material of the main roll and the remaining roll, wherein the connecting unit is also mounted so that it can move parallel to the roll rotation axes. Depending on the properties of the packaging material, the connecting unit can produce a thermal weld or an adhesive bond or another type of connection between the material of the main roll and the remaining roll, so that a continuous strand of packaging material is available in the further processing machine.

In order to ensure that the packaging material is unrolled evenly, a packaging material feeder is arranged downstream of the main roll unwinder, which is also mounted so that it can move.

In the case of films in particular, a dancer roller system is provided to compensate for existing material fluctuations or stretching, whereby the dancer roller system has the additional task of providing a certain material buffer so that sufficient time, usually for one machine cycle, is available to connect the material webs of the main roll and the remaining roll to one another.

Advantageously, the aforementioned components, i.e. the main and remaining roll unwinder, the connecting unit, the packaging material feed and the dancer roller system, can be moved together as a complete system in a direction parallel to the roll rotation axes. In this way, the entire feed device is virtually removed from the machine, making the respective components easier to access. In addition to overall mobility, it is planned to design individual components that can be moved sideways so that they can either be serviced individually or that different combinations can be moved out and

can be adjusted to one another. For example, it is possible to set up the feeding device completely and freely accessible and then position it as a complete system to the finishing machine. This reduces set-up costs, makes changing rolls easier, increases operating comfort and simplifies maintenance.

In addition to manual movement or extension of the main and remaining roll unwinder, the connecting unit, the packaging material feed or the dancer roller system, it is planned to move these using a motor drive, which further increases the ease of use. Such motor movement is particularly advantageous for larger-sized systems.

To make changing the main rolls easier, a pivoting bearing arm is provided for transferring the packaging material roll from the main roll unwinder to the remaining roll unwinder. The bearing arm is conveniently motor-driven, for example via a spindle gear. In order to be able to insert the new main rolls into the bearing of the main roll unwinder, the bearing arm is advantageously designed to be pivotable or lowerable in the opposite direction, so that the new rolls with packaging material can be easily moved up and inserted into the corresponding holders.

In addition or as an alternative to the material feed, it is provided that the packaging material rolls of the main roll unwinder and/or the residual roll unwinder are motor-driven so that the packaging material can be fed evenly, advantageously in time with the further processing machine.

Such a processing machine, in particular a packaging machine, advantageously has at least in sections a laterally open cross-section in the machine frame, wherein the feed device is arranged within the machine frame in such a laterally open section. A continuous, laterally open design of the machine frame area in which the feed device is located

The advantage of this is that the material web no longer has to be removed from the feeder when the machine is being set up next to the line, i.e. in an extended state. This has the advantage that the entire feeder can be pushed out of and into the machine as a unit and that complicated maintenance work can be carried out outside the lines. In addition, feeders for the items to be packaged can be arranged in line so that a straight material flow is guaranteed. The feeder is therefore in line below the work table in operation and can be moved sideways for maintenance or setup purposes.

Advantageously, the machine frame is designed as a cantilever frame or as a C-profile, which on the one hand achieves a high machine frame rigidity and on the other hand provides easy accessibility to the feeding device.

In order to be able to produce a continuous material strip, the packaging material of the main roll unwinding and the remaining roll unwinding are connected to one another at two points within the connecting unit and separated in such a way that the protruding packaging material of the main roll unwinding adheres to the remaining material of the remaining roll unwinding. This means that no sections are formed and time-consuming cleaning of the machine or removal of the sections is prevented. The material of the main roll unwinding and the remaining roll unwinding then forms a sealing seam that allows the respective items to be packaged continuously.

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An embodiment will be explained below using the attached figures. The same reference numerals in different figures denote the same components. They show:

Figure 1 - a side view of a feeding device;

Figure 2 - a plan view of the device according to Figure 1;

Figure 3 - a schematic representation of the device in normal operation; 10

Figure 4 - a schematic plan view when inserting a new roll of material;

Figure 5 - a schematic plan view of the device with the

Remaining roll processing;
15

Figure 6 - a plan view of the device with a main roll unwinder pulled out together with the packaging material feed and dancer roller system pulled out; and

Figure 7 - a side view of the device with a pivoted main roller unwinder.

Figure 1 shows a side view of a feeding device with a main roller unwinder 1, which consists of a frame with cross members 2 on which rollers 3 are arranged. The rollers 3 run in guide rails 4, 5, which are firmly connected to a machine frame 6. The machine frame 6, like the rest of the further processing machine, is only indicated and not shown in detail.

A bearing arm 7 that can be pivoted about a shaft 8 is arranged on the frame of the main roller unwinder 1, whereby pivoting is carried out by rotating a spindle in a spindle nut 11 connected to the bearing arm 7. The rotation is generated by an electric motor 9 that can be operated in both directions, so that the bearing

gerarm 7, as indicated by the arrows, can pivot in both directions around the shaft 8. This makes it possible, on the one hand, for a main roll 40 mounted on the bearing arm 7, after it has provided packaging material for a certain period of time, to be pivoted onto a residual roll unwinder 12. In addition, it is possible to lower the bearing arms 7 so far that new rolls of packaging material can easily be placed on the bearing points of the bearing arm 7.

The entire main roller unwinder 1 with the frame, the traverses 2, the bearing arms 7 and the packaging material rolls 40 can be moved perpendicular to the drawing plane, which provides easy accessibility and thus improved maintenance options.

The remaining roll unwinder 12 can also be moved in the same direction and is also mounted on guide rails 14 via rollers 13. The guide rails 14 are connected to a support 15 that is firmly connected to the machine frame 6, so that the remaining roll unwinder 12 can be moved easily and separately perpendicular to the plane of the drawing. In the embodiment shown in Figure 1, a connecting unit 22 is arranged within the remaining roll unwinder 12. In addition, a separating device for cutting off the material after the packaging material webs have been connected is provided in this connecting unit 22.

Also combined into one unit are the packaging material feeder 24 and the dancer roller system 23, which is mounted so that it can move on rails 4, 18 via rollers 16, 17. The packaging material feeder 24 serves to ensure that the packaging material is evenly unrolled from the main or remaining roll 40, 41 and fed as evenly as possible to the dancer roller system 23. The dancer roller system 23 compensates for different material requirements or material stretching and functions as a storage device so that the further processing machine does not have to be stopped if the packaging material feeder 24 stops due to a roll change.

Figure 2 shows the machine according to Figure 1 in plan view.

Figure 3 shows the normal operating position, in which work is carried out from the remaining roll 41, with the packaging material being fed to further processing by the feeder 24 and the dancer roller system 23. The new main roll 40 is inserted into the bearing arms 7. The beginning of the material of the main roll 40 is clamped by means of a clamping device 20 over a counter jaw 19 of the connecting unit 22 and is positioned opposite the connecting unit 22 via a lever 21. In response to a corresponding signal from a sensor unit, which indicates that the remaining roll 41 has fallen below a minimum diameter, the connecting unit 22, preferably a unit for thermal welding in the case of film materials, is moved against the counter jaw 19 and welding takes place at two spaced-apart points across the entire width of the film. Referring to Figure 1, the film of the remaining roll 41 is severed just above the lower weld seam and the material of the main roll 40 is now used without interruption. During the joining process, the dancer roller system 23 takes over the provision of an appropriate length of the material web.

After welding, the clamping device 20 is released and the section of the packaging material of the main roll 40 that is placed over the counter jaw 19 and is connected to the rest of the material of the remaining roll 41 via the upper weld seam can be removed. There is no loose section of the packaging material, in this case film.

Figure 4 shows the situation in which a new main roll 40 is inserted, whereby the insertion takes place outside the machine line. The new main roll 40 is inserted into the bearing arms 7 as described above and pushed into the machine frame 6 with the entire main roll unwinding 1. This takes place while the packaging material is unwinding from the remaining roll 41.

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Figure 5 shows the situation in which work is carried out from the main roll 40 while an unwinding shaft 310 is moved out to the side in order to remove it and, if necessary, to service it. The unwinding shaft 310 is then inserted into a new packaging material roll so that a new main roll 40 can be inserted if necessary.

Figure 6 shows how the dancer roller system 23, the packaging material feed 24 and the main roller 40 were pulled out of the machine frame 6 together. Such a situation is particularly useful for pulling in the packaging material and for setting up the dancer roller system 23, the feed 24 and the main roller unwinder 1. The packaging material or the film can thus be easily inserted from the main roller unwinder 1 through the sometimes complicated guide system, the feed 24 and the dancer roller system 23. The entire system is then retracted and the machine can be put into operation.

Figure 7 shows a roll change from the main unwinder 1 to the residual roll unwinder 12, where the counter jaw 19 has been pivoted away together with the clamping device. The bearing arms 7 are moved by the motor 9 so that the original main roll 40 comes to rest in a storage device of the residual roll unwinder 12. The main roll 40 thus becomes the residual roll 41 and the material strip runs along in front of the connecting unit 22. After the bearing arms 7 have been pivoted back, a new main roll 40 can be picked up and the start of the material web of the main roll 40 is pulled in via the counter jaw 19 and the clamping device 20. The counter jaw 19 is then brought back into the working position and the film is pulled taut by turning the main roll 40. The main roll 40 is inserted and the start of the film is set up on the counter jaw 19 via the clamping device 20 outside the line of the further processing machine. After the film has been pulled tight, the main unwinder 1 can be pushed back into the cantilevered machine frame 6 and is ready for a new roll change.

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Claims (13)

1. Device for feeding wound-up packaging material, in particular film, to a further processing machine, with a main roller unwinder ( 1 ) with a first roller rotation axis ( 30 ) for the rotatable storage of the packaging material, characterized in that the main roller unwinder ( 1 ) is mounted so as to be movable parallel to the first roller rotation axis ( 30 ). 2. Device according to claim 1, characterized in that a residual roll unwinder ( 12 ) with a second roll rotation axis ( 31 ) is provided and is mounted so as to be movable parallel to the roll rotation axes ( 30 , 31 ). 3. Device according to claim 1 or 2, characterized in that a connecting unit ( 22 ) for connecting the packaging material of the main roll ( 40 ) and the remaining roll ( 41 ) is provided and is mounted so as to be movable parallel to the roll rotation axes ( 30 , 31 ). 4. Device according to one of the preceding claims, characterized in that a packaging material feeder ( 24 ) is provided downstream of the main roller unwinder ( 1 ) and is mounted so as to be movable parallel to the roller rotation axes ( 30 , 31 ). 5. Device according to one of the preceding claims, characterized in that a dancer roller system ( 23 ) is provided downstream of the main roller unwinder ( 1 ) and is mounted so as to be movable parallel to the roller rotation axes ( 30 , 31 ). 6. Device according to one of the preceding claims, characterized in that the main roll unwinder ( 1 ), the remaining roll unwinder ( 12 ), the connecting unit ( 22 ), the packaging material feeder ( 24 ) and/or the dancer roller system ( 23 ) are motor-driven and can be moved. 7. Device according to one of the preceding claims, characterized in that the main roll unwinder ( 1 ), the remaining roll unwinder ( 12 ), the connecting unit ( 22 ), the packaging material feeder ( 24 ) and the dancer roller system ( 23 ) are designed to be movable together. 8. Device according to one of the preceding claims, characterized in that at least one bearing arm ( 7 ) pivotable in the direction of the remaining roll unwinding ( 12 ) for transferring the packaging material roll ( 40 ) is arranged on the main roll unwinder (1). 9. Device according to claim 8, characterized in that the bearing arm ( 7 ) is motor-driven. 10. Device according to one of the preceding claims, characterized in that the packaging material rolls ( 40 , 41 ) of the main roll unwinder ( 1 ) and/or the remaining roll unwinder ( 12 ) are motor-driven. 11. Further processing machine, in particular packaging machine, with a feeding device according to one of the preceding claims. 12. Machine according to claim 11, characterized by a machine frame ( 6 ) which has at least in sections a laterally open cross-section, wherein the feed device according to one of claims 1 to 10 is arranged within the machine frame ( 6 ) in a laterally open section. 13. Machine according to claim 12, characterized in that the machine frame ( 6 ) is designed as a cantilever frame or a C-profile.