DE102018206775A1 - Punch for cutting a film web, in particular for a packaging machine - Google Patents

Abstract

The present invention relates to a punch for cutting a film web, in particular for a packaging machine, with an upper tool and a lower tool, wherein the upper tool and the lower tool are connected to each other via a suspension, wherein the punch comprises interchangeable cutting tools for a hard film and a flexible film wherein each cutting tool comprises a cutting tool top and a cutting tool bottom, wherein the cutting tool top is interchangeably mounted to the top tool, and wherein the cutting tool base is interchangeably attached to the bottom tool.

Description

The present invention relates to a punch for cutting a film web, in particular for a packaging machine, with an upper tool and a lower tool, wherein the upper tool and the lower tool are connected to each other via a suspension, a packaging machine, in particular a thermoforming packaging machine, with a longitudinal and / or Cross-cutting device for dividing a film web and a method for switching from hard film to soft film, or vice versa, a punch.

In thermoforming packaging machines, a film web is deformed in a forming station into a container. It is also known to impress parallel two containers in the film web. Then the containers have to be separated. For this purpose, arranged on the thermoforming packaging machine, in particular at the forming station, arranged longitudinal and transverse cutting devices.

Depending on the container to be manufactured, different types of foils can be used. In this case, a distinction is made between flexible films and rigid films. The problem is that the cutting or cutting of hard and soft films works differently. In the case of a hard film, a knife presses the film against a pressure bar arranged on the side of the film opposite the knife, so that the film is basically crushed, with the pressure bar acting as an abutment. In contrast, for a flexible film, a punching or cutting device is best suited, in which the film is clamped on both sides and then cuts a knife through the film and thereby engages in a cutting gap arranged on the knife opposite side of the foil cutting bar.

In such a soft foil cutting device, compressed air is often used to move the knife. However, the compressed air connection required for this makes maintenance difficult and results in a complex structure of the cutting device. Such a soft film cutting device is used for example in the DE 203 13 228 U1 disclosed.

Since, due to the different cutting technique and the different dimensions of the individual components, a conversion of a hard foil punch on a soft foil punching or --schneideeinrichtung is complicated and expensive, it has been found in practice that the conversion of hard film on soft film often the two cooperating parts of the Hard foil punch are strongly braced against each other to apply the high force needed to cut the soft foil. However, this permanently damages the punch.

It was therefore an object of the present invention to provide a punch for cutting a film web available, which is convertible by simple means of hard film on soft film and does not require a compressed air connection.

This object is achieved by a punch for cutting a film web, in particular for a packaging machine, with an upper tool and a lower tool, wherein the upper tool and the lower tool are connected to each other via a suspension, wherein the punch against each other interchangeable cutting tools for a hard film and for a flexible film wherein each cutting tool comprises a cutting tool top and a cutting tool bottom, wherein the cutting tool top is interchangeably attached to the top tool, and wherein the cutting tool base is interchangeably attached to the bottom tool.

The present invention thus relates to a punch for cutting a film web, in particular for a packaging machine. In the context of this application, in particular stamping, cutting, severing and cutting in relation to a film is used synonymously. The punch is therefore in particular a cutting device. The punch now comprises an upper tool and a lower tool, wherein the upper tool and the lower tool are connected to each other via a suspension. Preferably, the suspension allows a relative movement between the upper tool and lower tool. Particularly preferably, the upper tool and the lower tool are braced against each other via the suspension, in particular via spring means. Preferably, the punch has a substantially flat main plane of extension, i. in particular, that the upper tool and the lower tool are formed substantially flat. This makes it possible that the punch attached to a packaging machine, in particular a thermoforming packaging machine, builds flat and thus can be easily integrated in a packaging line.

According to the invention, it is now provided that the punch comprises interchangeable hard foil and soft foil cutting tools, each cutting tool comprising a cutting tool top and a cutting tool base, the cutting tool top being replaceably mounted to the top tool and the cutting tool base being interchangeably attached to the bottom tool. The person skilled in the art understands that a hard film and / or a flexible film, in particular those intended for use in packaging machines, are usually used multilayer films are. In this case, in the case of a soft film, preferably all the layers are relatively soft, while a hard film comprises at least one comparatively hard layer. A hard film may in particular also comprise comparatively soft film layers. Decisive for the invention is now that for the conversion of hard film on soft film, or vice versa, not the entire punch must be replaced, but upper tool and lower tool remain mounted and only the cutting tool is replaced. For this purpose, the upper tool and / or the lower tool can preferably be brought into a change position, wherein the upper tool and the lower tool are in particular spaced from each other in the change position. For this purpose, the lower tool is particularly preferably spaced apart from the upper tool by a distance of 10 mm-50 mm, very particularly preferably 20 mm-40 mm and in particular by 30 mm from an operating position or mounting position. The cutting tool upper part and the cutting tool lower part are advantageously easily detachable from the upper tool or the lower tool, whereby a quick and easy conversion is possible. Advantageously, thus, the punch can be quickly equipped with suitable for the desired type of film cutting tools, which on the one hand improves the cutting results and on the other increases the life of the punch and / or reduces wear. Alternatively, however, the upper tool and lower tool are not moved against each other, but within the punch the cutting tools are moved apart, so in particular the cutting tool upper part of the associated Schneidwerkzeugunterteil by a distance of 10mm-50mm, most preferably 20mm-40mm and in particular by 30mm from an operating position or Mounting position and / or spaced apart. As a result, advantageously, the position of the upper tool and the lower tool is not changed, whereby a new setting of upper tool and lower tool is not required or at least only in parts.

The embodiments pertaining to this subject matter of the present invention apply equally to the other objects of the present invention and vice versa.

According to a preferred embodiment, it is provided that the cutting tool upper part for hard film comprises a knife holder and at least one, in particular releasably attached, knife, wherein the cutting tool base for hard film comprises a pressure bar holder and at least one, in particular releasably, attached pressure bar. A cooperating with a pressure bar knife is advantageously particularly suitable for rigid films. Alternatively or additionally, it is provided that the cutting tool lower part for soft film comprises a knife holder and at least one, in particular releasably attached, knife, the cutting tool upper part for soft film comprises a cutting bar with at least one gap for receiving the knife. The combination of a cutting bar with a (cutting) gap and a knife engaging therein, however, is advantageously particularly suitable for flexible films. Thus, for each type of film, the punch can be equipped with a suitable cutting tool. The combination of the two objects is particularly advantageous since, for reasons of space in an existing punch, the blades or the corresponding counterpart can not be provided in the same component, ie cutting tool upper part or lower part. Because the blade holder for a hard foil blade is designed as a cutting tool upper part and the blade holder for a soft foil blade as a cutting tool lower part, and accordingly the pressure strip holder as the cutting tool bottom part and the cutting strip as the cutting tool shell, both cutting tools can be used without modifications to the upper tool and / or the lower tool in the same punch be used. The skilled person understands that a punch can also be provided in such a way that the cutting tool parts are provided in reverse, that is, for example, the cutting tool lower part comprises a knife holder for a hard foil blade or a cutting strip. The same applies in this case for the cutting tool shell. Preferably, a cutting tool upper part according to the invention is approximately 30 mm-50 mm, particularly preferably 35 mm-45 mm, in particular approximately 43 mm-44 mm, high and approximately 60 mm-90 mm, particularly preferably 70 mm-80 mm, in particular 76 mm, wide and / or an inventive cutting tool lower part is approx. 66 mm high and 14 mm wide. The length (in the main extension direction) of the cutting tool upper part or cutting tool lower part is variable and preferably dependent on the film width of the film used. Particularly preferably Schneidwerkzeugober- and -unterteile be provided in different, matching different film widths, lengths.

According to a preferred embodiment, it is provided that the cutting tool lower part for flexible film comprises at least one movable, in particular slots, mounted on the blade contact strip, wherein particularly preferably a contact strip is arranged on both longitudinal sides of the blade. The contact strips are preferably arranged such that in a rest position the knife blade does not protrude between the contact strips. If now the lower tool, in particular the cutting tool lower part, moved in the direction of the film, ie vertically upward, so the terminal strips first clamp the film. In the further method, the contact strips are now preferably guided downwards by the fastening over the elongated holes on the knife, or the knife is moved upwards out of the space between the two contact strips and, separating the film, engages in the (cutting) Gap the cutting bar of the cutting tool upper part. Thus, in a particularly advantageous manner, on the one hand, the safety of the cutting tool is increased, since the sharp blade is not exposed in the rest position and, secondly, a clamping of the film is made possible to produce a required for the division voltage of the film.

According to a preferred embodiment, it is provided that the cutting tool for soft film and / or the cutting tool for hard film comprises a film hold-down, particularly preferably a hold-down sheet. Most preferably, the hold-down plate is connected to the cutting strip of the cutting tool upper part for flexible film and / or to the knife holder of the cutting tool upper part for hard film, in particular reversibly. Even more preferably, the hold-down plate is a spring plate, in particular with a bias in the direction of the film. As a result, the film is brought into a predetermined position and at the same time generates a tension in the film in order to allow a safe and reproducible cutting. Furthermore, a snagging of the film on the cutting tool and thereby possible damage to the films is advantageously avoided.

According to a preferred embodiment it is provided that the knife for soft film is a serrated knife and / or that the knife for hard film is a smooth knife. More preferably, the soft foil blade and / or the hard foil blade is a gusset, i. in particular, the knife is shaped in such a way that it imprints gussets into the film during dicing.

According to a preferred embodiment it is provided that the suspension comprises at least one spring means, in particular at least one plate spring. Preferably, the suspension comprises two variable-length, in particular substantially cylindrical rods, each rod comprising at least one, preferably two, disc springs. This makes it possible in a particularly advantageous manner, to arrange the upper tool relative to the lower tool at predetermined intervals and / or to provide the upper tool relative to the lower tool with a bias.

According to a preferred embodiment it is provided that the suspension has an adjusting means for fixing the upper tool and the lower tool in one of a plurality of predetermined mounting positions relative to each other, the adjusting means particularly preferably at least one spacer means, in particular a spacer sleeve, and / or at least one means includes for displaying the mounting position. Most preferably, the suspension comprises at least one thread, which can be adjusted for example via a scale ring and / or a nut, so as to determine the exact distance of the upper tool to the lower tool and / or change. Furthermore, a means for indicating the mounting position is advantageously realized by a scale ring, as can be read off the assembly position on the scale ring. This makes it possible in a particularly advantageous manner, depending on the type of film to set a predetermined distance between the upper tool and lower tool and in particular between cutting tool shell and cutting tool base.

According to a preferred embodiment it is provided that the upper tool, the lower tool and / or the suspension comprise fastening means for, in particular reversible, attachment to the packaging machine. Particularly preferably, the fastening means comprise screw holes, grooves, latching projections, undercuts and / or other positive and / or non-positive means.

Another object of the present invention is a packaging machine, in particular a thermoforming packaging machine, with a longitudinal and / or transverse cutting device for dividing a film web, wherein the longitudinal and / or transverse cutting device is a punch according to the invention.

The embodiments pertaining to this subject matter of the present invention apply equally to the other objects of the present invention and vice versa.

The punch according to the invention is particularly preferably one of the packaging machine, in particular (a forming station) of a thermoforming packaging machine, upstream and / or downstream cross-cutting device. Such a packaging machine can be converted in a particularly advantageous manner quickly and easily for the use of rigid film or flexible film.

Yet another object of the present invention is a method for converting hard film to soft film, or vice versa, a punch or a packaging machine according to the invention, wherein the connection between the cutting tool shell and the upper tool is released and the cutting tool shell to be replaced, in particular parallel to a transport direction of a Film web through the punch, is removed from the punch, wherein the cutting tool shell to be exchanged, in particular parallel to the transport direction, is inserted and connected to the upper tool, wherein the connection between the cutting tool lower part and the lower tool is released and the cutting tool base to be exchanged, in particular parallel to the transport direction, is removed from the punch the cutting tool lower part to be exchanged, in particular parallel to the transport direction, is inserted into the lower tool and connected thereto. This makes it possible in a particularly advantageous manner to make a quick, easy and cost-effective changeover from hard film to flexible film or vice versa, whereby furthermore an optimally suitable cutting tool can always be used for each type of film.

The embodiments pertaining to this subject matter of the present invention apply equally to the other objects of the present invention and vice versa.

According to a preferred embodiment of the method according to the invention, it is provided that the punch remains attached to the packaging machine during the process. As a result, the conversion is simplified in a particularly advantageous manner.

According to a particularly preferred embodiment of the method according to the invention, the lower tool is spaced from the upper tool for conversion, more preferably by a distance of 10mm-50mm, most preferably by a distance of 20mm-40mm, in particular by a distance of about 30mm. Alternatively or additionally, the cutting tool base is spaced from the cutting tool shell for conversion, more preferably by a distance of 10mm-50mm, most preferably by a distance of 20mm-40mm, in particular by a distance of about 30mm.

Preferably, the cutting tool lower part and / or the cutting tool upper part are fastened to the lower tool or the upper tool via fastening means, such as screws.

• 1 zeigt eine Frontalansicht einer Stanze gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 2a, 2b zeigen seitliche Ansichten einer Stanze gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 3 zeigt eine perspektivische Explosionszeichnung einer Stanze gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 4 zeigt eine perspektivische Ansicht einer Aufhängung gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 5 zeigt eine Frontalansicht einer Aufhängung gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 6 zeigt einen Druckleistenhalter mit einer daran befestigten Druckleiste gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 7a-7c zeigen verschiedene Ansichten des Druckleistenhalters mit einer daran befestigten Druckleiste aus 6 gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 8 zeigt einen Messerhalter für ein Hartfolienmesser gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 9a-9d zeigen verschiedene Ansichten des Messerhalters für ein Hartfolienmesser aus 8 gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 10a, 10b zeigen zwei perspektivische Ansichten einer Schneidleiste gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 11a-11d zeigen verschiedene Ansichten der Schneidleiste aus den 10a, 10b gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 12 zeigt einen Messerhalter für ein Weichfolienmesser gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.
• 13a, 13b zeigen eine Seitenansicht und eine Frontalansicht des Messerhalters aus 12 gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung.

The invention 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.

• 1 shows a frontal view of a punch according to a preferred embodiment of the present invention.
• 2a . 2 B show side views of a punch according to a preferred embodiment of the present invention.
• 3 shows an exploded perspective view of a punch according to a preferred embodiment of the present invention.
• 4 shows a perspective view of a suspension according to a preferred embodiment of the present invention.
• 5 shows a front view of a suspension according to a preferred embodiment of the present invention.
• 6 shows a pressure bar holder with an attached pressure bar according to a preferred embodiment of the present invention.
• 7a-7c show different views of the pressure bar holder with an attached pressure bar 6 according to a preferred embodiment of the present invention.
• 8th shows a blade holder for a hard foil blade according to a preferred embodiment of the present invention.
• 9a-9d show different views of the knife holder for a Hartfolienmesser 8th according to a preferred embodiment of the present invention.
• 10a . 10b show two perspective views of a cutting bar according to a preferred embodiment of the present invention.
• 11a-11d show different views of the cutting bar from the 10a . 10b according to a preferred embodiment of the present invention.
• 12 shows a knife holder for a soft film knife according to a preferred embodiment of the present invention.
• 13a . 13b show a side view and a front view of the knife holder 12 according to a preferred embodiment of the present invention.

In 1 is a frontal view of a punch 1 according to a preferred embodiment of the present invention. Such a punch 1 is for example used as a cross-cutting device in a thermoforming packaging machine. It includes an upper tool 2 and a lower tool 3 that have a suspension 4 so are stored, that a relative movement between them is possible. In other words, the upper tool 2 and the lower tool 3 on the suspension 4 suspended. The suspension 4 So wear the upper tool 2 and the lower tool 3 , The suspension 4 here comprises two substantially cylindrical elements, which are provided in particular variable in length. The change in length is on the above arranged, large nuts together with the connected scale rings 7 possible, in particular via an internal thread in the cylindrical elements.

Preferably, the upper tool 2 and the lower tool 3 adjustable in several predetermined mounting positions, which for example by means of spacers 6 , which can be in different heights, according to the different mounting positions, and on the suspension 4 , in particular on both sides, be attached. Here they are between two spring means 5 , in the present case designed as disc springs, clamped. The disc springs allow a bias of the upper tool 2 against the lower tool 3 , The different mounting positions are required, for example, for different film thicknesses.

The punch 1 is doing about fasteners 8th , for example, via screws and corresponding screw holes, or via holes which cooperate with arranged on the thermoforming packaging machine rod elements, attached to the thermoforming packaging machine. In the present case, for example, the lower tool 3 Fixedly attached to the packaging machine, while the upper tool 2 vertically adjustable height is provided. Alternatively, upper tool 2 and lower tool 3 fixed in a mounting position relative to each other and only those in the upper tool 2 and the lower tool 3 attached cutting tools are provided movable relative to each other, in particular via at least one drive.

The cutting tools are provided interchangeably or exchangeable and are in particular as provided for a specific type of film kit, consisting of a cutting tool shell 20 . 20 ' and a cutting tool base 30 . 30 ' , Particularly preferably, at least two different cutting tools are provided: one for cutting a soft film and one for cutting a hard film. In each case, the cutting tool upper part comprises 20 or the cutting tool base 30 ' a knife 22 . 34 for the respective film type and the associated cutting tool lower part 30 or the cutting tool shell 20 ' includes an interacting with the knife antidote, in particular a pressure bar 32 for the hard foil knife 22 or a cutting bar 23 with a (cutting) gap 24 for the soft foil knife 34 ,

In the 2a and 2 B are lateral views of a punch 1 according to a preferred embodiment of the present invention. The punch corresponds to this 1 essentially related to 1 explained punch 1 , which is why reference is made in principle to the relevant statements. It is in 2a to realize that the punch 1 in the present case, a cutting tool shell 20 ' in the form of a cutting bar 23 with a gap 24 includes, as well as a cutting tool base 30 ' in the form of a bilateral movable contact strips 36 framed soft foil knife 34 , which is used to cut the soft film web into the gap 24 can intervene. The function of the contact strips 36 will be explained in detail below. Here is, for example, the cutting tool base 30 ' provided vertically movable by a drive. In 2 B Again, the scale ring is good in the upper area 7 recognizable. Is by means of the nut a predetermined mounting position, corresponding to a predetermined distance between the upper tool 2 and lower tool 3 , set, the scale ring rotates 7 with the mother with and on the top tool 2 arranged marking the mounting position can be determined quantitatively.

In 3 is an exploded perspective view of a punch 1 according to a preferred embodiment of the present invention. The punch corresponds to this 1 essentially related to 1 and the 2a and 2 B explained punch 1 , which is why reference is made in principle to the relevant statements. In addition to the illustrations already explained, the drive device arranged in the lower tool can be seen here in the right-hand area of the drawing, by means of which the cutting tool lower part 30 . 30 ' is vertically movable. It is also good to see that the punch 1 consists of a limited number of elements and therefore advantageously simple in design and easy to maintain.

In 4 is a perspective view of a suspension 4 according to a preferred embodiment of the present invention. In this case, the illustrated embodiment does not essentially go beyond those already described above suspension 4 addition, so that reference is made to the above statements.

In 5 is a frontal view of a suspension 4 according to a preferred embodiment of the present invention. In this case, the illustrated embodiment is essentially not about the previously described suspension 4 addition, so that reference is made to the above statements.

In 6 is a pressure bar holder 31 with a pressure bar attached to it 32 according to a preferred embodiment of the present invention. The pressure bar is here, for example, a cutting tool base 30 , It provides an abutment for the knife 22 of the cutting tool shell 20 dar. Because the pressure bar 32 by the constant load of knives 22 and film wears, it is reversible, here about screws 8th , on a pressure bar holder 31 attached. Through the illustrated window in the area of the screws, there is access to nuts, by means of which the screws 8th can be solved. The access is possible from the front, so the pressure bar 32 also in the assembled state of the punch 1 is interchangeable. This allows an easy and quick change. The pressure bar 32 It has as horizontal and smooth a surface as possible to allow for clean cuts.

In the 7a-7c are different views of the pressure bar holder 31 with a pressure bar attached to it 32 out 6 according to a preferred embodiment of the present invention. Here are the illustrations of the pressure bar 32 and the pressure bar holder 31 essentially not about the in 6 shown embodiment, which is why reference is made in principle to the relevant embodiments.

In 8th is a knife holder 21 for a hard foil knife 22 according to a preferred embodiment of the present invention. Such a knife holder 21 is a cutting tool shell 20 , In it becomes a knife 22 fastened reversibly, eg via screws to be seen from the side, with the knife 22 suitable for rigid films.

In the 9a-9d are different views of the knife holder 21 for a hard foil knife 22 out 8th according to a preferred embodiment of the present invention. Here are the representations of the knife holder 21 essentially not about the in 8th shown embodiment, which is why reference is made in principle to the relevant embodiments. In particular in 9b You can clearly see that this is the knife 22 is a gusset. Over the entire length of the knife 22 , 3 gussets are provided, which are embossed when cutting into the film and mark, for example, corners of the package.

In the 10a and 10b are two perspective views of a cutting bar 23 according to a preferred embodiment of the present invention. In such a cutting track 23 it is a cutting tool shell 20 ' , She works with a knife 34 for soft film together. This includes the cutting bar 23 a gap 24 in its dimensions on the knife 34 is tuned. Particularly preferred is the cutting bar 23 also reversibly attached to a cutter bar mount to the cutter bar 23 under certain circumstances to replace.

In the 11a-11d are different views of the cutting bar 23 from the 10a . 10b according to a preferred embodiment of the present invention. Here are the illustrations of the cutting bar 23 essentially not in the 10a and 10b shown embodiment, which is why reference is made in principle to the relevant embodiments. Preferably, on the cutting bar 23 , in particular reversible, a Folienniederhalter 25 , here in the form of a metal strip, attached. Furthermore, here are in 11b parallel to the gap 24 to recognize two further gaps of lesser depth. In this, the laterally of the knife to be explained in the manner yet to be explained 22 arranged contact strips 36 one.

In 12 is a knife holder 33 for a soft foil knife 34 according to a preferred embodiment of the present invention. The knife holder 33 comprises a recess in which, in particular reversible, suitable for soft films, such as jagged, knife 34 used and attached. The knife 34 has over its longitudinal extension several, here for example four, slots 35 on. Above these are both sides of the knife 34 and parallel to this two contact strips 36 arranged. In an initial state, which corresponds to a rest position, there are the contact strips 36 For example, biased by at least one spring means, in an upper position. In this is the knife 34 between the contact strips 36 sunk, ie in particular, that the upper knife blade below the through the upper edge of the contact strips 36 defined level is located. Will now the cutting tool base 30 ' activated to cut a film web, so does the knife holder 33 , Preferably driven by a drive, not shown here, moved vertically upwards. The contact strips 36 Finally, contact the film and engage through the film in the previously described column. As a result, the film is clamped and placed under the required tension to cut through the soft film can.

Once the contact strips 36 Having reached their final position, they begin in the long holes as a result of the continuous drive 35 to move down, or the knife 34 is moving between the contact strips 36 up. So it occurs so a relative movement between the knife 34 and contact strips 36 one. The knife 34 finally occurs between the contact strips 36 and cuts through the film, reaching into the gap 24 one. An abutment for the knife 34 this is preferably not required.

In the 13a and 13b are a side view and a front view of the knife holder 33 out 12 according to a preferred embodiment of the present invention. Here are the representations of the knife holder 33 and the knife 34 as well as the contact strips 36 essentially not about the in 12 shown embodiment, which is why reference is made in principle to the relevant embodiments.

LIST OF REFERENCE NUMBERS

1

punch

2

upper tool

3

lower tool

4

suspension

5

spring means

6

Stand Off

7

scale ring

8th

fastener

20, 20 '

Cutting tool upper part

21

Knife holder (hard foil)

22

Knife (hard foil)

23

cutting bar

24

gap

25

Slide down device

30, 30 '

Cutting tool base

31

Pressure molding holder

32

print bar

33

Knife holder (soft foil)

34

Knife (soft foil)

35

slots

36

contact strip

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

• DE 20313228 U1 [0004]

Claims (10)

Punch (1) for dividing a film web, in particular for a packaging machine, with an upper tool (2) and a lower tool (3), wherein the upper tool (2) and the lower tool (3) via a suspension (4) are interconnected, characterized characterized in that the punch (1) comprises interchangeable cutting tools for a hard foil and for a soft foil, each cutting tool comprising a cutting tool top (20, 20 ') and a cutting tool bottom (30, 30'), the cutting tool top (20, 20 ' ) is replaceably attached to the upper tool (2) and wherein the cutting tool lower part (30, 30 ') is interchangeably fixed to the lower tool (3). Punch (1) to Claim 1 characterized in that the hard foil cutting tool top (20) comprises a knife holder (21) and at least one knife (22) attached thereto, the hard tool cutting piece (30) having a print bar holder (31) and at least one, in particular detachable attached pressure bar (32), and / or wherein the cutting die bottom (30 ') for soft film comprises a knife holder (33) and at least one, in particular releasably attached, knife (34), the cutting tool top (20') for Soft foil comprises a cutting bar (23) with at least one gap (24) for receiving the blade (34). Punch (1) according to one of the preceding claims, characterized in that the cutting tool lower part (30 ') for soft film at least one movably, in particular via elongated holes (35) on the blade (34) mounted contact strip (36), wherein particularly preferably two longitudinal sides of the blade (34) each have a contact strip (36) is arranged. Punch (1) according to one of the preceding claims, characterized in that the cutting tool for soft film and / or the cutting tool for hard film comprises a film restrainer (25), particularly preferably a hold-down sheet. Punch (1) according to one of the preceding claims, characterized in that the blade (34) for soft foil is a serrated knife and / or that the blade (22) for hard foil is a smooth knife. Punch (1) according to one of the preceding claims, characterized in that the suspension (4) comprises at least one spring means (5), in particular at least one disc spring. Punch (1) according to one of the preceding claims, characterized in that the suspension (4) has an adjusting means for fixing the upper tool (2) and the lower tool (3) in one of a plurality of predetermined mounting positions relative to each other, the adjusting means being particularly preferably at least one spacer, in particular a spacer sleeve (6), and / or at least one means for indicating the mounting position comprises. Punch (1) according to one of the preceding claims, characterized in that the upper tool (2), the lower tool (3) and / or the suspension (4) comprise fastening means (8) for, in particular reversible, attachment to the packaging machine. Packaging machine, in particular thermoforming packaging machine, with a longitudinal and / or transverse cutting device for dividing a film web, characterized in that the longitudinal and / or transverse cutting device is a punch (1) according to one of the preceding claims. Method for converting hard film to flexible film, or vice versa, a punch (1) according to one of Claims 1 - 8th or a packaging machine according to Claim 9 in which the connection between the cutting tool upper part (20, 20 ') and the upper tool (2) is released and the cutting tool upper part (20, 20') to be exchanged, in particular parallel to a transport direction of a film web through the punch (1), out of the punch ( 1), wherein the cutting tool upper part (20 ', 20) to be exchanged is inserted, in particular parallel to the transport direction, into the upper tool (2) and connected thereto, the connection between the cutting tool lower part (30, 30') and the lower tool (3) is released and the exchangeable cutting tool lower part (30, 30 '), in particular parallel to the transport direction, from the punch (1) is removed, wherein the einzuchauschende cutting tool lower part (30', 30), in particular parallel to the transport direction, in the Lower tool (3) is inserted and connected to this.

Images