EP3365146A1

EP3365146A1 - Device and method for cutting off a providing a film part unit from a food packaging film strip

Info

Publication number: EP3365146A1
Application number: EP16785452.0A
Authority: EP
Inventors: Thomas Speck; Joachim Scherr; Konrad Bantleon
Original assignee: Chocal Aluminiumverpackungen GmbH
Current assignee: Chocal Aluminiumverpackungen GmbH
Priority date: 2015-10-23
Filing date: 2016-10-21
Publication date: 2018-08-29
Also published as: WO2017068109A1; US20180305165A1; DE102015220738A1

Abstract

The invention relates to a time-efficient, cost-effective, reliable and material-saving device (1) for cutting off and providing a film part unit (20) from a food packaging film strip (7), comprising a cutting station (2) configured to intermittently cut off film part units (20) from a film strip (7) intermittently passing through the cutting station (2) in a conveying direction (5), characterised in that the cutting station (2) is configured to pre-cut a film part unit (20) in a working step, wherein the film part unit (20) remains connected to the film strip (7), and to cut off a film part unit (20) from the film strip (7) that is adjacent in the conveying direction (5) and already pre-cut in a previous working step. The invention also relates to a corresponding method.

Description

Apparatus and method for severing and providing a film section unit from a food packaging film belt

The present invention relates to a device for separating and providing a film piece unit from a food packaging film tape and a corresponding method according to the preambles of the independent claims.

It is known from practice to withdraw a tape of wound food packaging film from a coil and feed it to a cutting station. In the cutting station, the end of the film strip is pushed beyond an intended interface according to the length to be cut off. The interface is defined here by a knife, which provides a cut across the entire width of the film strip. Subsequently, the protruding part of the film strip at the interface of the knife is completely cut off. The resulting separate piece of film is then fed manually to a downstream working process.

In the known cutting process, each section is cut individually from the film strip. Due to the very thin film thicknesses customary in the food packaging sector, the film must be pushed into the cutting station in a structurally complex manner in order to prevent possible wrinkling on moving the film. Nevertheless, the thin film can easily be damaged or form unwanted wrinkles.

The present invention is based on the object to improve the known system and the corresponding method such that the cutting of the film sections can be carried out time efficient, cost-effective and material-saving, reliable and gentle on the material, while the film is least strained and remains smooth or no wrinkles or distortions forms.

The present invention achieves the stated object with the features of the independent device claim.

Such a configuration of the cutting station, so that in a single operation a film section unit is indeed pre-cut, but still remains connected to the film strip, and a previously pre-cut film section unit is separated from the film strip, by pulling the precut film section unit in the conveying direction simultaneously allows the film strip and thus Pull subsequent film in the conveying direction, and so pull into the cutting station. Since the film by a tensile stress in the conveying direction is moved, it is ensured that the film remains smooth during movement and not deformed undesirable. In addition, such a pre-cutting and the separation can be done time efficiently in one operation.

In a further embodiment, the cutting station can have a knife arrangement defining the film section unit, wherein a separating knife arranged last in the conveyor direction provides a cut transversely to the conveying direction, which separates the film section unit from the film strip. The last arranged in the conveying direction separating knife ensures easy and reliable that a previously pre-cut film section unit is separated from the film strip.

In a particular embodiment, the knife assembly may comprise at least one roughing knife, in particular a plurality of spaced apart roughing knife, which extends from the separating blade against the conveying direction and / or at an angle to the conveying direction. The arrangement of such a roughing knife makes it possible to divide the film section unit by pre-cutting into sections of desired dimensions, each having a matched to the contour of the roughing cutter cut geometry. The format of the cuts is thus at least partly determined by the roughing knife. The optional provision of a plurality of mutually spaced Vorschneidemessern makes it possible to cut several cuts in the same time, and also allows the precutting of each adjacent sections. The latter allows optimal use of area of the film strip, since the entire film strip can be precut into sections. This reduces the film waste.

Conveniently, in another embodiment, the knife assembly may comprise a further separating knife, which is arranged upstream of the separating knife in the conveying direction and provides a section transverse to the conveying direction, which completely separates at least one piece of film part of the film piece unit from the film strip. Such an arrangement of a further separating knife makes it possible for the film section unit to have a plurality of film sections arranged one behind the other in the conveying direction and thus increases the number of film sections in the film section unit.

In particular, at least one further roughing knife, in particular a plurality of further spaced-apart roughing knife, extend at an angle to and / or counter to the conveying direction of the further severing knife. The arrangement of such a further roughing knife makes it possible to divide the film section unit by pre-cutting into further film sections with desired dimensions. The format of the ren sheet sections is thus determined at least in part by the roughing knife. The optional provision of a plurality of mutually spaced Vorschneidemessern makes it possible to pre-cut several pieces of film at the same time, and also allows the precutting of each adjacent further film sections. The latter allows optimum use of the area of the film strip, since the entire film strip can be pre-cut into parts of the film section, each of which has cut geometries adapted to the contour of the corresponding pre-cutting knife. This further reduces the film waste.

In a further embodiment, the cutting station can have a movable punch knife with the knife arrangement. The tamping knife makes it possible to quickly and reliably pre-cut the film section unit in one operation and to separate the adjacent, already pre-cut film section unit from the film strip.

Furthermore, it is proposed that the device has a movable transfer unit which is adapted to selectively couple with a pre-cut film section unit located in the cutting station and to move it in the conveying direction, in particular to move it out of the cutting station. By means of the transfer unit, the pre-cut film section unit is reliably moved by the cutting station in the conveying direction. In this case, the film is conveyed under train into the cutting station, which prevents wrinkling or the formation of wrinkles in the film. The selective coupling allows the timing of the coupling and decoupling to be controlled. Optionally, moving the sheet section unit out of the cutting station allows for pre-cutting a subsequent sheet section unit in the cutting station and subsequent processing of the precut sheet section unit.

Furthermore, the transfer unit can be set up to move a film section unit located in the cutting station with its connection point to the film strip at the point at which the cut-off knife provides a cut transversely to the conveying direction. This ensures that the film section piece to be moved is severed from the film web at the designated location and also combines this function with the retraction of an uncut film section unit into the cutting station and the removal of a precut film section unit from the cutting station.

Conveniently, the transfer unit may be adapted to couple and / or decouple the film section unit only on one side of the film. The coupling and / or decoupling of the film section unit on only one side of the film allows the transfer unit for coupling / decoupling of the film section unit to approach only from one direction What is needed in a constructive way through a simpler and more compact design of the cutting station and the transfer unit. In addition, the contact between the film section and the transfer unit is reduced to one side of the film section unit, which facilitates both the coupling of the film section unit and the decoupling.

In a particular embodiment, the transfer unit may have a suction device, in particular a suction plate. The aspirator reduces the risk of injuring the film divisional unit during docking / decoupling as well as during movement with the transfer unit. The optional embodiment in the form of a suction plate makes it possible to move the film section unit in a flat and / or flat position and shape.

In a further embodiment, the device can have a film conveying unit which can selectively couple and hold a partial section of the film strip located upstream in the conveying direction of the cutting station and / or move it in the conveying direction. As a result, the film to be tracked is supported by the film conveying unit and reduces the force acting on the connection point between the pre-cut film section unit and the remaining film strip. In particular, provided for narrow joints this prevents accidental damage or premature tearing of the film section unit at the junction. The selective coupling and holding may also reduce a potentially adverse effect of the cutting operation on the parts of the film strip upstream of the film conveying unit.

Conveniently, the film conveying unit and the transfer unit can be connected to one another via a movable, rigid structure, in particular via a carriage. This allows the movements of the film conveying unit and the transfer unit to be coupled together, so that both units can be moved with only one movement. Furthermore, the rigid structure ensures that during the movement of the two units whose distance remains defined so as not to injure or collapse the film. The optional version with a slide enables a simple and reliable connection of the film feed unit to the transfer unit.

Preferably, the film conveying unit may comprise a clamping device, which may selectively clamp the portion of the film strip on both sides of the film strip. The clamping device allows a reliable and fast coupling and holding and / or moving the portion of the film strip. Clamping from both sides of the film strip increases the reliability of power transmission from the film conveying unit to the film web and reduces the risk of damaging the film at the nip. Continue to be by the two-sided terminals possible adverse effects of the cutting process on the film conveying unit upstream parts of the film strip is particularly reduced.

The present invention furthermore achieves the stated object with the features of the independent method claim.

The pre-cutting of a film section unit, wherein it remains connected to the film strip, and separating a downstream in the conveying direction, pre-cut by a previous operation film section unit from the film strip in the same operation allows by pulling the precut film section unit in the conveying direction, the remaining film strip also in the conveying direction To draw pre-cutting. Since the film is moved only by a tensile stress in the conveying direction, it is ensured that the film remains smooth during the movement and does not collapse or deform undesirable. Furthermore, a more elaborate advancing the film for the precutting is no longer necessary. Furthermore, pre-cutting and cutting are done time efficiently in one operation.

In a further embodiment, the film section unit can be precut into at least one piece of film piece which is connected to the film strip and at least one piece of film part which is completely separated from the film strip. This increases the number of cut film sections in the film section unit per operation and thus the yield of film sections per time.

Furthermore, the film section unit can be pre-cut with a knife assembly and the adjacent film section unit can also be separated with this knife assembly, in particular with a die blade having the knife assembly. A pre-cutting and separating the film section unit with the same knife assembly makes it easy to perform both cutting operations in the same operation.

Conveniently, the pre-cut film section unit can be moved with its point of connection to the film strip to a position in the conveying direction, at which it is separated from the film strip during precutting of a subsequent film section unit. This ensures that the film section unit is separated from the film strip exactly at a designated location.

In a further embodiment, the pre-cut film section unit can be selectively coupled by a transfer unit, in particular by a movable suction device, in particular by a movable suction plate, and moved in the conveying direction. With- By means of the transfer unit, the film section unit is reliably moved in the conveying direction. By selectively coupling the sheet piece unit and moving in the direction of conveyance, the sheet is surely and reliably moved under tension to pre-cut, preventing wrinkling or the formation of wrinkles in the sheet. The optional coupling and movement of the film by means of a movable suction device reduces the risk of injuring the film section unit during the Koppeins and the movement with the transfer unit. The optional coupling and movement of the film section unit by means of a Sauplatte allows the film section unit to move in a flat and / or flat position and shape.

Furthermore, the separated from the film strip sheet section unit can be moved to a subsequent processing station. This allows an automated, fast and direct processing of the separated film section unit.

In a further variant of the invention, a section of the film strip which is upstream of the precut film section unit in the conveying direction can be moved simultaneously in the conveying direction, in particular at a constant distance from the precut film section unit, with the precut film section unit. As a result, the film to be tracked is supported in its movement and reduces the force acting on the connection point between the pre-cut film section unit and the remaining film strip force. Especially with narrow joints this prevents accidental damage or premature tearing of the film section unit at the junction. The optional constant pitch movement further reduces unwanted injury or collapse of the film as it moves.

For a better understanding of the invention, a possible embodiment of the invention will be explained in more detail with reference to the figures described below.

Show it

Figure 1 is a schematic, side view of a device according to the invention in a state in which a film section unit is already pre-cut in a cutting station.

FIG. 2 shows the schematic view of FIG. 1 in a state in which a transfer unit has moved into the cutting station and couples the pre-cut film section unit; FIG. 3 shows the schematic view of FIG. 2 in a state in which the transfer unit has moved the pre-cut piece of film unit unit still connected to the film band out of the cutting station into a defined position,

Figure 4 is the schematic view of Figure 3, in a state in which the cutting station has separated the already pre-cut film section unit from the film strip and has pre-cut in the same operation, a subsequent film section unit,

Figure 5 is the schematic view of Figure 4, in a state in which the transfer unit has carried the separated film section unit to a subsequent processing station,

FIG. 6 is a schematic plan view of a not yet pre-cut film section unit with still contiguous film sections;

7 is a schematic plan view of a pre-cut film section unit with partially separated film sections,

Figure 8 is a schematic plan view of a complete separated from the film strip

Folienteilstückeinheit with separated film sections,

9 shows a schematic top view of the cutting side of a stamp knife, FIG.

Figure 10 is a schematic view of the device shown in Figure 3 from above.

The structure of the device according to the invention will first be described with reference to FIGS. 1 and 6 to 10.

As can be seen in FIG. 1, the device 1 comprises a cutting station 2, a transfer unit 3 and a film conveying unit 4.

The transfer unit 3 and the film conveying unit 4 are positioned on a carriage 6 that moves back and forth along the conveying direction 5 and pull a film strip 7 intermittently in the conveying direction 5 through the cutting station 2. The film strip 7 extends taut and wrinkle-free in the region of the cutting station 2. approximately along the conveying direction 5.

The conveying direction 5 of the film 7 is shown in all figures as a dashed arrow. The cutting station 2 has a piston 8 which reciprocates linearly and perpendicularly to the conveying direction 5 between an open, retracted position and a closed cutting position and which has a punch blade 10 with a knife arrangement 1 1 on a side 9 facing the film strip 7. The punch 8 is driven by a linear actuator 12. The cutting station 2 further has a stamping table 13, which is arranged opposite the stamp 8, so that the film strip 7 extends between the stamp 8 and the stamping table 13. The film strip 7 is pulled intermittently during operation by the transfer unit 3 via the stamping table 13.

In the conveying direction 5 upstream to the cutting station 2 is a film supply unit 14 which rotatably supports the film strip 7 in the form of a peelable Foliencoils 15. The film coil 15 may be rotatably driven and / or braked to aid the stripping operation.

Downstream of the cutting station 2 in the conveying direction 5 there is a processing station 16, which has hollow molds 17 for the molding of packaging halves for hollow figures.

The transfer unit 3 has a suction plate 18. The suction plate 18 is on its side facing the film strip 7 bottom 19 and on its upper surface 22 and can retract into the roughing unit 2 in the open position of the punch 8 to suck there with the aid of vacuum a precut film section unit 20b, in the conveying direction 5 from the cutting station 2 and finally store in the processing station 16.

10 shows the suction plate 18 with a sucked, pre-cut film section unit 20b outside of the cutting station 2. The suction plate 18 is at the points where when positioning in the cutting station 2 on its underside 19 individual pieces of film pieces 28, 29 (hereinafter "cuts"). called) of the pre-cut sheet section unit 20b are provided with through holes 21 so that application of negative pressure from the top 22 of the suction plate 18 causes a vacuum on the underside 19 of the suction plate 18. The sections 28, 29 of the sheet section unit 20b which are flat here can thus be selectively coupled with the entire surface of their top surface by the flat bottom 19 selectively.

On the upper side 22 of the suction plate 18 are vacuum lines 23, which are connected to the through holes 21. For the sake of clarity, the vacuum lines 23 are shown schematically only in FIG. 10, only a few of which are provided with reference marks. They are connected to a vacuum reservoir, which is not shown for clarity, controllably connected. For easier understanding, the in FIG 10 sucked on the bottom 19, pre-cut film section unit 20b with their sections 28, 29 shown in dashed lines. The same applies to a still uncut film piece unit 20a below the punch 8.

As seen in Fig. 10, the suction plate 18 is attached to one end of the movable carriage 6. The suction plate 18 is compared to the film strip 7 in the vertical direction on the side of the punch 8 and spans the film strip 7 like a bridge across the conveying direction 5. The transfer unit 3 can thus in an area above the film strip 7 and between the cutting station 2 and the Processing station 16 to move back and forth.

As can be seen from FIG. 10 in conjunction with FIG. 1, the film-conveying unit 4 here has four clamping jaws 24, 25, wherein two clamping jaws 24, 25 lie opposite each other on both sides of the film band 7. In each case located on a side of the film clamping jaws 24 are connected to each other via a cross member 26 of the carriage 6, which creates across the entire width of the film strip 7 transverse to the conveying direction 5. The clamping jaws 24, 25 are controllably movable between a closed and thus the film strip 7 clamping state and an open, the film strip 7 releasing state.

The transfer unit 3 and the Folienfordereinheit 4 are connected via two parallel to each other and parallel to the conveying direction 5 extending longitudinal member 27 of the carriage 6 rigidly and at a defined distance from each other. The respective ends of the longitudinal members 27 are connected to each other by the two cross members 26 and the suction plate 18. The suction plate 18 is in the vertical, so perpendicular to the conveying direction 5, controllably arranged by actuators, not shown, on the longitudinal members 27 movable. The carriage 6 is driven by a not shown, controllable moving unit and moved along the conveying direction 5 back and forth.

In Figure 6, a film section unit 20a is shown in a still uncut state. The places where the stamp knife 10 provides cuts are shown in dashed lines. The total of 6 rectangular sections 28, 29 of the film section unit 20a are arranged in the arrangement 3 x 2 and share one end of the film strip 7 completely with each other. The number of sections 28, 29 and their arrangement in the conveying direction 5 and transversely to the conveying direction 5 is, if necessary, on the design of the knife assembly 1 1, as will be made clear later, arbitrarily variable.

FIG. 7 shows a film section unit 20b in the precut state. The pre-cut film section unit 20b comprises the six sections 28, 29, wherein three sections 29 are already completely cut off from the remaining film strip 7 and from each other, and three further sections 28 are each still connected to a side edge 30 with the film strip 7. The side edges 30 represent the connection point of the pre-cut film piece unit 20b to the remaining film strip 7. The sections completely cut off from the film strip 7 29 are arranged in a row next to each other over the entire width of the film strip 7 at the outermost in the conveying direction 5 point of the film strip 7 ,

In Fig. 8, a sheet piece unit 20c is shown in the completely cut state. All six sections 28, 29 are completely separated from adjacent sections and from the remaining foil strip 7.

FIG. 9 shows the punch blade 10 of the punch 8 with the knife arrangement 11.

The knife assembly 1 1 comprises a last arranged in the conveying direction 5 Abtrennmesser 31, which provides a section transverse to the conveying direction 5, which the precut film piece unit 20b, when moved out of the cutting station, at the junction 30 of the film strip 7 separates. The severing blade 31 is here an elongate blade, which runs perpendicular to the conveying direction 5 and perpendicular to the film band end lying in the cutting station 2.

The knife assembly 1 1 further comprises two spaced, blade-like Vorschneidemesser 32, which extend from the Abtrennmesser 31, against the conveying direction 5 and parallel to it.

The knife assembly 1 1 also has a further blade-like severing blade 33, which is arranged upstream of the severing knife 31 in the conveying direction 5 and also provides a section transverse to the conveying direction 5 over the entire width of the film strip 7. The further severing knife 33 runs parallel to the severing knife 31 and perpendicular to the roughing cutters 32. The section provided by this further severing knife 33 here completely separates the sections 29 shown in FIG. 6 from the film strip 7 at the dashed line 34.

The knife assembly 1 1 further comprises two further, blade-like rough cutting blade 35, which extend parallel to and against the conveying direction 5 of the other Abtrennmesser 33 and continue the Vorschneidemesser 32 here. The common length of the roughing cutters 32, 35 corresponds to the length of the cuts 36 running parallel to the conveying direction in FIG. 7 in the conveying direction 5.

If one compares the blade arrangement 1 1 shown in FIG. 9 with the film section unit 20 a shown in dashed lines in FIG. 6, it becomes clear that the blade arrangement 1 1 mat of the film section unit 20a. By the knife assembly 1 1, the Folienteilstuckeinheit 20a is separated into the individual sections 28, 29, wherein all sections 28, 29 can be used in downstream processing processes.

The mode of operation of the device 1 according to the invention and the method according to the invention will be explained in more detail with reference to FIGS. 1 to 5. Figures 1 to 5 show schematically the device 1 in successive successive operations. Movements of individual parts, which are carried out in a directly subsequent operation, are indicated by arrows for better understanding.

The jaws 24, 25 are opened in the state shown in Figure 1. On the stamping table 13, a pre-cut film piece unit 20b is in a state as shown in FIG

7 is shown.

The suction plate 18 is located in the conveying direction 5 at the level of the molds 17. The individual sections 28, 29 of a separate film section unit 20c was just placed by interrupting the negative pressure on the suction plate 18 on the molds 17 of the processing station 16 and the suction plate 18 has already some distance away from the molds 17 vertically upwards. The carriage 6 with the suction plate 18 and the jaws 24, 25 is in its outermost position in the conveying direction 5. The punch 8 is in its retracted position.

Subsequently, the carriage 6 moves the suction plate 18 and the Folienfordereinheit 4 against the conveying direction 5, until the suction plate 18 in the cutting station 2 in the between the punch

8 and the stamping table 13 formed corridor and stops above the pre-cut film section unit 20b is stopped. The carriage 6 with the suction plate 18 and the clamping jaws 24, 25 is here in its outermost position against the conveying direction 5. The punch 8 is still in its retracted position.

The suction plate 18 now moves vertically on the pre-cut film piece unit 20b until the bottom 19 is in planar contact with the film piece unit 20b. Now, the film section unit 20b is sucked by vacuum and thereby coupled on one side with the suction plate 18 surface. Here, both the still connected to the film strip 7 sections 28 and the already separated from the film strip 7 sections 29 are coupled by the suction plate 18.

Shortly after the suction plate 18 has coupled to the film section unit 20b, the opposing clamping jaws 24, 25 also move toward each other and clamp NEN subsection of the upstream in the conveying direction 5 of the cutting station 2 film strip 7. This state is shown in Figure 2.

Subsequently, the carriage 6 moves the suction plate 18 with the sucked, pre-cut film section unit 20b in a defined position in the conveying direction 5, so that the connection point 30 is aligned with the Abtrennmesser 31 and can be separated by this in a stamping operation. In the carriage movement is passed through the still existing joint 30 between the precut film piece unit 20b and the remaining film strip 7, the pulling movement of the suction plate 18 to the remaining film strip 7 and thus the remaining film strip 7 also pulled in the conveying direction 5 and a part thereof in the cutting station. 2 which comes as a pre-cut film section unit 20a below the punch knife 10 on the stamping table 13 comes to rest.

The film conveying unit 4 with the closed clamping jaws 24, 25 in this case supports the film strip 7 in its movement in the conveying direction 5 and thus limits the pulling force acting on the connecting point 30. Unintentional tearing off of the pre-cut film section unit 20b at the connection point 30 during drawing is thus prevented in the case of a long and heavy film web 7 and / or a film roll 15 which is difficult to unroll.

The deposited in the processing station 16 sections 28, 29 has been formed in the meantime with a forming die, not shown, to hollow half-shells, and then transported via a gripper, also not shown to a subsequent operation.

Figure 3 shows the pre-cut film piece unit 20b with the suction plate 18 and the joint 30 in the position described above.

Below the punch 8 there is now a still uncut film piece unit 20a, as shown in FIG.

Now moves the punch 8 with the knife assembly 1 1 against the stamping table 13, thereby transferring its knife assembly 1 1 in the form of cuts on the film strip 7. The closed jaws 24, 25 avoids that the movement of the punch blade 10 disadvantageous in the conveying direction 5 before the jaws 24, 25 located parts of the film strip 7 transmits.

FIG. 4 shows the punch 8 in its fully extended position, in which the punch blade 10 has penetrated the foil strip 7 at points determined by the knife arrangement 11. In a now following operation of the punch moves 8 back to its retracted position and the jaws 24, 25 open.

The sheet section unit 20b on the stamping table 13 is now precut, as shown in FIG. For the purposes of the invention, the term "pre-cutting" is to be understood as meaning any kind of separation, including only partial separation of film / film parts. The film section unit 20c, which is coupled to the suction plate 18, is now completely separated from the film strip 7 and is in the form shown in Figure 8, in which all sections 28, 29 are completely separated. The pre-cutting of a not yet pre-cut film section unit 20a and the separation of an adjacent, already pre-cut film section unit 20b is thus carried out in a cutting operation. Preferably, these cutting operations occur simultaneously.

Subsequently, the jaws 24, 25 open.

The carriage 6 with the open jaws 24, 25 and coupled to the suction plate 18 sections 28, 29 now moves in the conveying direction 5, until the suction plate 18 is above the molds 17.

FIG. 5 shows how the suction plate 18, here still coupled with the completely separated film section unit 20c, is located above the molds 17 in the processing station 16.

In a subsequent step, the suction plate 18 is moved with the film section unit 20c against the molds 17 and terminated the voltage applied to the suction plate 18 vacuum. As a result, the film section piece unit 20c is placed with its individual, completely separated from each other sections 28, 29 on the molds 17 accordingly.

The subsequent work step is similar to the operation previously described for Figure 1.

According to further possible embodiments, the food packaging film separated and provided according to the present invention may be a metal foil, in particular an aluminum foil, a plastic foil or a foil with an aluminum-plastic composite.

In further possible embodiments, the food packaging film separated and provided according to the invention may be a film for packaging chocolate, preferably a film for packaging chocolate hollow figures. According to further possible embodiments, the food packaging film separated and provided according to the invention may have a film thickness in the range of 5μηι to Ι ΟΟμηΊ, in particular a thickness in the range of 10μηΊ to 50μη ", especially a thickness in the range of 15μηι to 30μηΊ.

Claims

claims

1 . Device (1) for separating and providing a film section unit (20a, 20c) of a food packaging film strip (7), with a cutting station (2), which is adapted to a film strip intermittently passing through the cutting station (2) in a conveying direction (5) (7) intermittently separating film subunit units (20a, 20c), characterized in that the cutting station (2) is adapted to pre-cut a film subunit unit (20a) in one operation, the film subunit unit (20a) remaining connected to the film web (7), and to separate from the film strip (7) a film section unit (20b) adjoining in the conveying direction (5) and already pre-cut by a preceding operation.

2. Device (1) according to claim 1, characterized in that the cutting station (2) has a the foil section unit (20a, 20b, 20c) defining knife assembly (1 1), wherein in the conveying direction (5) last arranged separating blade (31) a section transverse to the conveying direction (5) provides, which separates the film section unit (20b) of the film strip (7).

3. Device (1) according to claim 2, characterized in that the knife assembly (1 1) has at least one roughing knife (32), in particular a plurality of spaced apart Vorschneidemesser (32), which from the Abtrennmesser (31) against the conveying direction (5) and / or at an angle to the conveying direction (5).

4. Device (1) according to claim 2 or 3, characterized in that the knife assembly (1 1) has a further separating blade (33), which is arranged upstream of the separating blade (31) in the conveying direction (5) and a section transverse to the conveying direction provides that at least one film section (29) of the film section unit (20a) completely separated from the film strip (7).

5. Device (1) according to claim 4, characterized in that from the further separating knife (33) at least one further roughing knife (35), in particular a plurality of further spaced apart roughing knife (35), at an angle to and / or against the conveying direction (5 ).

6. Device (1) according to one of claims 2 to 5, characterized in that the cutting station (2) has a movable punch blade (10) with the knife assembly (1 1).

7. Device (1) according to one of the preceding claims, characterized in that the device (1) has a movable transfer unit (3), which is adapted to a in the cutting station (2) located pre-cut Folienteilstück- unit (20b) to couple selectively and to move them in the conveying direction (5), in particular from the cutting station (2) to move out.

8. Device (1) according to claim 7 and as far as dependent on claim 2, characterized in that the transfer unit (3) is adapted to a in the cutting station (2) located film section unit (20b) with its connection point (30) to the film strip ( 7) to move to the point at which the separating blade (31) provides a section transverse to the conveying direction (5).

9. Device (1) according to claim 7 or 8, characterized in that the transfer unit (3) is adapted to couple the film section unit (20b, 20c) only on one side of the film and / or decouple.

10. Device (1) according to one of claims 7 to 9, characterized in that the transfer unit (3) has a suction device, in particular a suction plate (18).

1 1. Device (1) according to one of the preceding claims, characterized in that the device (1) has a Folienfordereinheit (4), which selectively couple a portion of the in the conveying direction (5) of the cutting station (2) upstream foil bands (7) and hold and / or move in the conveying direction (5).

12. Device (1) according to claim 1 1, characterized in that the Folienförderein- unit (4) and the transfer unit (3) via a movable, rigid structure, in particular via a carriage (6) are interconnected.

13. Device (1) according to any one of claims 1 1 or 12, characterized in that the film conveying unit (4) has a clamping device (24, 25), which the portion of the film strip (7) on both sides of the film strip (7) selectively can pinch.

14. A method for separating and providing a film section unit (20a, 20c) from a food packaging film belt (7), wherein

Film section units (20a, 20c) are intermittently separated from a film strip (7) running intermittently in a conveying direction (5), characterized in that the film section unit (20a) is pre-cut in one operation, whereby it remains connected to the film strip (7), and in the same operation a in the conveying direction (5) adjacent, by a previous operation already pre-cut film section unit (20b) from the film strip (7) is separated.

15. The method according to claim 14, characterized in that the film-piece unit (20a) in at least one film section (28) which is connected to the film strip (7), and at least one film section (29) which completely from the film strip (7). is separated, is pre-cut.

16. The method according to claim 14 or 15, characterized in that the film section unit (20a) precut with a knife assembly (1 1) and the adjacent film section unit (20b) also with this knife assembly (1 1) is separated, in particular with a punch knife (10 ), which has the knife assembly (1 1).

17. The method according to any one of claims 14 to 16, characterized in that the pre-cut film section piece unit (20b) is moved with its connection point (30) to the film strip (7) to a position in the conveying direction (5), at which they during precutting a subsequent film section unit (20a) is separated from the film strip (7).

18. The method according to any one of claims 14 to 17, characterized in that the pre-cut film section unit (20b) by a transfer unit (3), in particular by a movable suction device, in particular by a movable suction plate (18) is selectively coupled and in the conveying direction ( 5) is moved.

19. The method according to any one of claims 14 to 18, characterized in that the foil strip (7) separated from the film section piece unit (20c) is moved into a subsequent processing station (16).

20. The method according to any one of claims 14 to 19, characterized in that a pre-cut film section unit (20b) in the conveying direction (5) upstream portion of the film strip (7) at the same time, in particular at a constant distance from the precut film section unit (20b), with the precut Folienteilstückeinheit (20b) in the conveying direction (5) is moved.