WO2016177816A1 - Packaging machine having a clamping shaft - Google Patents

Abstract

The invention relates to a packaging machine for producing a packaging, comprising a sealing station that seals a film web to a packaging tray, which, optionally, is deep-drawn in a film web, wherein the film web is arranged on a film roll, which is provided on a shaft, preferably in a rotationally fixed manner. The invention further relates to a method for aligning a film roll relative to a packaging machine, wherein the film roll is provided on a shaft having a rod assembly.

Description

 Packaging machine with a tensioning shaft

The present invention relates to a packaging machine for producing a

Packaging, with a sealing station, which seals a film web to a packaging tray, which is optionally deep-drawn into a film web, wherein the film web is arranged on a film roll, which is preferably rotatably provided on a shaft. Furthermore, the present invention relates to a method for aligning a film roll relative to a packaging machine, wherein the film roll is provided on a shaft with a linkage.

Such packaging machines, for example so-called thermoformers or

Tray sealers are known in the art. In these packaging machines, for example, a lower film web is unrolled from a supply roll and transported intermittently along the packaging machine. The thermoformer is in one

Forming station first formed a packaging tray in the lower film web, which is then filled with a packaged, in particular a food. Subsequently, the packaging tray is sealed in a sealing station with a top film which is sealed to the lower film. The film web is also unrolled from a supply roll. At least one of the two film rolls are mounted on a shaft and rotatably connected thereto. The shaft is often driven, but provided in particular braked. The non-rotatable connection between the shaft and the core of the film roll was done in the past often with an inflatable tube, which reversibly changed the diameter of the shaft. However, this solution has particular hygienic defects. In order to enable a smooth operation of the packaging machine, it is necessary in a film roll change and / or during operation, the position of the film roll parallel to its axis of rotation and relative to the

Change packaging machine. But in the past, the entire wave was moved along its axis of rotation, which is very expensive.

It was therefore the object of the present invention, a method and a

Packaging machine to provide that does not have the disadvantages of the prior art.

The object is achieved with a packaging machine, for producing a packaging, with a sealing station, which seals a film web to a packaging tray, which has optionally been deep-drawn into a film web, wherein the film web is arranged on a film roll, which preferably rotatably provided on a shaft with the shaft having means for moving the film roll relative to parts of the shaft. The disclosure made on this subject of the present invention applies equally to the other objects of the present invention and vice versa.

The present invention relates to a packaging machine. In such a

Packaging machine may be, for example, a so-called thermoformer, but also a traysealer on which plastic films are usually processed. In the thermoformer, for example, a lower film web is unrolled from a supply roll and transported intermittently along the packaging machine. In a forming station, first a packaging tray is formed in the lower film web, which is then filled with a packaged product, in particular a foodstuff. Subsequently, the packaging tray is sealed in a sealing station with a top film which is sealed to the lower film. The film web is also unrolled from a supply roll. At least one of the two film rolls is mounted on a shaft and rotatably connected thereto. The shaft is often driven in particular but braked.

According to the invention, the shaft now has means for moving the film roll relative to parts of the shaft parallel to the axis of rotation of the shaft. As a result, it is no longer necessary to move the entire shaft parallel to its axis of rotation, but only part of the shaft, which makes the construction of the shaft less complicated. Consequently, not only the storage of the shaft remains stationary, but also parts of the shaft itself become

Aligning the shaft is not linearly shifted.

Preferably, the shaft has a linkage that rotates when rolling the film roll. According to this preferred embodiment of the present invention, the film roll moves, in particular linear, in their orientation relative to the rest

Packaging machine relative to this linkage, which is therefore only rotatable but not longitudinally displaceable.

Preferably, the shaft has a push / pull rod which moves a tensioning means of the film roll. The tensioning means then moves parallel to the axis of rotation of the shaft to move the film roll to which it is connected and relative to the frame

Align packaging machine. The clamping means is preferably mounted directly or indirectly displaceably on the linkage.

According to a further preferred or inventive subject matter of the present invention, the shaft has at least one sub-segment, which is relative to a Linkage of the shaft shifts, in particular axially and / or radially, to connect the film roll rotatably connected to the shaft reversible.

The disclosure made on this subject of the present invention applies equally to the other objects of the present invention and vice versa.

The fact that the shaft consists at least essentially of the linkage and / or displaceable sub-segment (s), is a relatively open construction, which is easy to clean. The sub-segment is preferably a clamping strip whose length preferably corresponds substantially to the extent of the roller along its axis of rotation. Preferably, the shaft has a plurality, in particular three sub-segments, which are provided in particular in a 120 ° pitch to each other. Preferably, all sub-segments move synchronously and / or by the same path, in particular in the radial direction, so that the film roll even after their rotation

Attachment to the shaft as possible rotates about its central axis.

Preferably, the sub-segment has a slanted oblique to the central axis of the shaft backdrop. On the shaft, a means, such as pin, is provided, which engages in the backdrop. Now, if the means, for example, moves axially along the central axis of the shaft, the sub-segment shifts relative to the pin and thereby radially outward or radially inward. Also preferably, a lever linkage can be provided, via which the axial movement of the agent is converted into a radial movement of the sub-segment.

Preferably, the shaft has two sliders which move towards each other for tensioning the film roll along the central axis of the shaft. On these slides, the means is preferably provided which moves each sub-segment. Between two slides preferably a central piece is provided, which is stationary in the radial displacement of the sub-segments and which preferably guides the sections in the radial direction. For this, the middle piece has a means, for example a pin, which engages in a slot of the respective subsegment. Preferably, a drive is provided for each slider, which is preferably designed as a pneumatic muscle. But it can also be a drive, such as a motor, are provided for both sliders. In addition, but also a hand-driven drive, for example, one on a counter-rotating

Threaded spindle with RechWLinkssteigung acting handwheel, for both sliders are provided.

Another object of the present invention is a method for aligning a film roll relative to a packaging machine, wherein the film roll is provided on a shaft with a linkage in which, for alignment, the film roll is moved relative to the linkage parallel to the axis of rotation of the shaft. The disclosure made on this subject of the present invention applies equally to the other objects of the present invention and vice versa.

The alignment preferably takes place during retraction and / or during operation.

Preferably, a sensor detects the position of the film roll and / or the film web and by means of its signal, the position of the film roll is adjusted relative to the shaft.

The inventions will be explained below with reference to the figures. These explanations are merely exemplary and do not limit the general inventive concept. The explanations apply equally to all articles of the present invention.

FIG. 1 shows the packaging machine according to the invention.

 FIG. 2 shows the shaft

 Figure 3 shows details of the alignment mechanism of the shaft.

 Figure 4 shows the clamping mechanism of the shaft

 Figure 5 shows details of the clamping mechanism of the shaft

 Figure 6 shows a part of the slider

 Figure 7 shows the linkage of the shaft

FIG. 1 shows the packaging machine 1 according to the invention, which has a thermoforming station 2, a filling station 7 and a sealing station 15. A lower film web 8, here a plastic film web 8, is withdrawn from a supply roll and cyclically transported along the packaging machine according to the invention from right to left. The

Film roll is mounted on a shaft 10, which is explained in more detail with reference to Figures 2-7. At one stroke, the sub-web 8 is further transported by a preference, wherein it requires several advantages to produce a finished package. For that, the

Packaging machine two transport (not shown), in the present case in each case two endless chains, which are arranged on the right and left of the lower film web 8. Both at the beginning and at the end of the packaging machine at least one gear is provided for each chain in each case, around which the respective chain is deflected. At least one of these gears is driven. The gears in the input area and / or in the output area may be connected to each other, preferably by a rigid shaft. Each transport has a plurality of clamping means which grip the lower film web 8 in the inlet region 19 by clamping and the movement of the

Transport means transmitted to the lower film web 8. In the outlet area of the

Packaging machine, the clamping connection between the transport and the lower film web 8 is released again. Downstream of the inlet region 19, a heating means is provided which heats the film web 8, especially when it is stationary. In the thermoforming station 2, which has an upper tool 3 and a lower tool 4, which has the shape of the packaging tray to be produced, the packaging trays 6 are formed in the warmed film web 8. The lower tool 4 is arranged on a lifting table 5, which, as symbolized by the double arrow, is vertically adjustable. Before each film feed, the lower tool 4 is lowered and then raised again. In the further course of the packaging machine, the packaging trays are then filled in the filling station 7 with the packaged goods 16. In the adjoining

Sealing station 15, which also consists of an upper tool 12 and a vertically adjustable lower tool 1 1, a top film 14 is firmly bonded, for example, by sealing to the lower film web 8. Also in the sealing station will be the

Upper tool and / or the lower tool before and after each film transport lowered or raised. The upper film 14 is unrolled by a film roll, which is mounted on a shaft 10, and may be guided in transport means or be transported by transport chains, said transport then extend only from the sealing station and possibly downstream. Otherwise, the statements that apply to the

Means of transport of the lower film were made. Even the top film can with a

Heating medium warmed and deep-drawn. For sealing purposes, a heatable sealing frame is provided as a lower tool 11, for example, which has an opening per packaging cavity into which the packaging cavity is sealed during sealing, i. in the

Upward movement of the lower seal tool dips. For sealing, the upper and the lower film web between the upper and the lower tool 12, 1 1

compressed and combine under the influence of heat and pressure. After sealing, the tools 1 1, 12 are moved apart vertically again. Between the supply roll and the sealing tool, a dancer is preferably provided, which compensates for the intermittent feed of the lower film 8 and thus the intermittent withdrawal of the upper film web 14. The dancer can serve as a film web storage and / or for generating a specific film tension. The person skilled in the art understands that several top films may be present, for example in a multi-layered package or a package with several top films. Preferably, a dancer is then provided in the course of each top sheet. The person skilled in the art will further understand that a dancer can also be provided in the region of the lower film 8, preferably downstream of the supply roll. In the further course of the packaging machine, the finished packages are separated, which takes place in the present case with the cross cutter 18 and the slitter 17. The cross cutter 18 can also be raised or lowered in the present case with a lifting device 9.

The packaging machine according to the invention may also be a so-called tray sealer, in which filled packaging trays are closed with a cover film. Figure 2 shows the shaft 10 of the packaging machine according to the invention, on which a film roll is stored. The shaft 10 is preferably designed as a clamping shaft, ie the film roll is fixed in rotation on the shaft. The shaft 10 can be fastened by means of a holder 13 to the frame of the packaging machine according to the invention. The shaft has a rotating linkage 22, and preferably at least one slider 21 and a middle piece 40, each movable relative to the linkage. In the event that the shaft is not housed, preferably a protection, in particular an apron 37, is provided. The core of the film roll is pushed onto the shaft until the film roll rests against the stop 31. Subsequently, the core of the film roll is fixed against rotation on the shaft, which is described below. In addition, the position of the film roll relative to the packaging machine by a movement of the film roll parallel to the

Rotary axis of the shaft to be changed, which is also explained below.

Figure 3 shows the mechanism with the parts of the shaft, in particular the linkage and the sub-segments 20, are provided parallel to the axis of rotation displaced. This mechanism is used to align the film roll transversely to its unwinding direction as well as relative to the packaging machine. For this purpose, the unwinding device has a drive 23, which in the present case consists of a motor 24 which rotatably drives a spindle 25, which thereby moves linearly back and forth and cooperates with a lever which is rotationally driven by the spindle. The rotational movement of the lever 26 is transmitted to a sliding bearing 27 that moves as shown by the double arrow linear here to the right or to the left. This sliding bearing drives a push rod 28 whose linear motion is transmitted by means of the connecting means 30 to each sub-segment 20, which thereby moves linearly parallel to the central axis of the shaft. The remainder of the shaft, such as its linkage, remains stationary during this movement. By this movement, the orientation of the film roll, which abuts against each sub-segment 20 and on the stop 31. The alignment can

take place, for example, in a film roll change but also in operation of the packaging machine according to the invention. In the present case, the linkage 22 is designed as a hollow tube, whose one end is connected to a power and / or energy supply 29 for a drive means which drives the sub-segments 20. For example, the means 29 is compressed air. The skilled person understands that the drive of the sliding bearing 27 can also be designed differently. By means of the hub 41, on which, for example, a toothed belt wheel or gear or brake elements can be arranged, the shaft 10 is driven or braked. Figures 4 and 5 show details of the rotationally fixed fixation of the film roll on the shaft. For this purpose, the shaft has at least one, in this case three subsegments 20, which are uniformly preferably provided in a 120 degree graduation on the shaft. Each sub-segment is displaceable radially outward. In its central region, the shaft has a central piece 40 with a pin 33, for example a cylindrical pin, which cooperates with a slot 34 extending in each sub-segment, extending perpendicularly to the central axis of the shaft, and the sub-segments being directed outwards or inwards Movement, which is required for clamping or for releasing the film roll from the shaft lead. In each case, to the right and left of this guide, a lubricant 21 is provided which can each move relative to the central piece 40 and parallel to the central axis of the shaft. These lubricants are driven by a drive 32, in the present case preferably a pneumatic muscle that can expand or contract driven by compressed air. The compressed air is

preferably provided by the hollow shaft 28. For clamping the

Film roll on the shaft, the sliding means move away from the center piece 40 and to release this connection, they are retracted in the direction of the center piece. As can be seen in particular from FIG. 5, the sliders 21 each have a pin, in particular a cylindrical pin, per sub-segment 20, which projects into a slotted guide 34 in the sub-segment, that is to say at an angle to the central axis. the clamping device engages. By a movement of the slider 21 and thus of the pin 33, the clamping means 20 is pushed to the outside and thereby fixes the film roll rotatably on the shaft. All

Clamping means 20 are simultaneously moved outwards, as well as by the same radial amount, so that the film roll rotates centrically around the central axis of the shaft 10 even after its rotationally fixed attachment.

As can be seen in particular from Figures 4 and 5, each slider has at least one, here two disc-shaped elements, which is shown in Figure 6. The disc has in each case at its periphery a bearing 35 for one rod of the

Linkage 22. Furthermore, each disc has a receptacle 38, here a pocket, in which the pin 33 is mounted and which is fixed between two discs. Furthermore, each one can

Disc a receptacle 36 for protection, in particular a finger guard have.

Figure 7 shows the linkage of the shaft, which rotates when rolling the film roll. This linkage consists in the present case of three rods which are equidistant in a 120 degree pitch to each other. At this linkage slide the slider when fixing the film roll and in addition the center piece when aligning the film roll relative to the frame of the packaging machine back and forth. The rods of the linkage are preferably prestressed.

LIST OF REFERENCE NUMBERS

1 packaging machine

 2 forming station, thermoforming station

 3 upper tool of the thermoforming station

 4 lower tool of thermoforming station

 5 lifting table, carrier of a tool of the sealing, thermoforming station and / or the cutting device

 6 packaging tray

 7 filling station

 8 film web, bottom film web

 9 lifting device

 10 shaft, tension shaft

 1 1 lower tool of the sealing station

 12 upper tool of the sealing station

 13 bracket

 14 top film web, lid film

 15 sealing station

 16 packaged goods

 17 slitter

 18 cross cutters

 19 inlet area

 20 sub-segment, clamping device, clamping bar

 21 slider

 22 rods, round rod

 23 Drive of the axial displacement

 24 engine

 25 spindle

 26 lever

 27 Linear drive, sliding bearing

 28 push rod

 29 Power and / or energy supply for the clamping devices

 30 connecting means between the push rod 28 and the clamping bar 20th

31 stop

 32 Slider drive, pneumatic muscle

 33 pin, pin

34 scenery, long hole Bearing location for the rod 22 Bearing for protection 37 Protection, mudguard, finger guard Pick-up for the pin, pin 33 Pick-up for the clamping bar center piece

Rotary drive of the shaft

Claims

claims: A packaging machine (1) for producing a package, comprising a sealing station (15) which seals a film web (14) to a packaging tray (6)  optionally in a film web (8) has been deep-drawn, wherein the film web (8, 14) is arranged on a film roll, which is preferably rotatably provided on a shaft (10), characterized in that the shaft (10) means (20, , 21, 23, 28, 30) for moving the film roll relative to parts (22) of the shaft. 2. Packaging machine according to claim 1, characterized in that the shaft (10) has a linkage and that moves the roller relative to this linkage (22). 3. Packaging machine according to claim 1 or 3, characterized in that it comprises a push rod (28) which moves a tensioning means (20) of the film roll. 4. Packaging machine according to one of the preceding claims or the  The preamble of claim 1, characterized in that the shaft (10) has at least one sub-segment (20) which is displaceable relative to a linkage (22) of the shaft (10), in particular axially and / or radially displaceable to the film roll rotatably connected to the shaft (10) reversible. 5. Packaging machine according to claim 4, characterized in that the  Partial segment (20) has an oblique to the central axis of the shaft provided gate (34) or a similar effect linkage. 6. Packaging machine according to one of claims 4 or 5, characterized  characterized in that the shaft has two sliders (21) which extend to the  Tension the film roll along the central axis of the shaft to move towards each other. 7. A method for aligning a film roll relative to a packaging machine, wherein the film roll on a shaft (10) with a linkage (22) is provided, characterized in that for alignment, the film roll relative to the  Linkage (22) is moved parallel to the axis of rotation of the shaft (10). 8. The method according to claim 7, characterized in that the alignment takes place during retraction and / or operation. 9. The method according to any one of claims 7 or 8, characterized in that a sensor determines the position of the film roll and / or the film web (8, 14) and that by means of its signal, the position of the film roll is adjusted relative to the shaft.