EP0698454A1 - Method and device as well as punchknife for making tearing perforations on corrugated paperboard products - Google Patents

Method and device as well as punchknife for making tearing perforations on corrugated paperboard products Download PDF

Info

Publication number
EP0698454A1
EP0698454A1 EP95109521A EP95109521A EP0698454A1 EP 0698454 A1 EP0698454 A1 EP 0698454A1 EP 95109521 A EP95109521 A EP 95109521A EP 95109521 A EP95109521 A EP 95109521A EP 0698454 A1 EP0698454 A1 EP 0698454A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting edges
corrugated cardboard
line
punching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95109521A
Other languages
German (de)
French (fr)
Inventor
Armin Höllwarth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seyfert Wellpappe & Co GmbH
Original Assignee
Seyfert Wellpappe & Co GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seyfert Wellpappe & Co GmbH filed Critical Seyfert Wellpappe & Co GmbH
Publication of EP0698454A1 publication Critical patent/EP0698454A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006Cutting members therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/08Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
    • B26D3/085On sheet material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26FPERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/18Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006Cutting members therefor
    • B26D2001/006Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations

Definitions

  • the invention relates to a method for producing perforation lines in corrugated cardboard, in which with at least one punching knife which can be brought into engagement with the corrugated cardboard and which has individual cutting edges which take a predeterminable distance from one another and whose cutting edges are arranged along a first cutting line, the corrugated cardboard along continuous, spaced apart separation points is severed.
  • a perforation line is generated in the corrugated cardboard material which has cut lines at defined intervals which completely cut through the corrugated cardboard.
  • the corrugated cardboard can easily be bent or folded over along the perforation lines to form transport containers, even if the corrugated cardboard material is made stronger.
  • the addressed transport container is to be opened along a relevant perforation line by tearing open, for example a lid part of the container large opening forces are required for this and often there is a lateral tearing of the corrugated cardboard at the connection points of the corrugated cardboard material along the perforation line, which makes the opening process difficult or even impossible if, for example, part of the cover tears off.
  • the connecting material cross-section is very small compared to the perforation line mentioned at the beginning and is therefore weakened for a separation of the material, which reduces the tear forces, there are still obstacles when opening the packaging and an unclean tear-open edge due to the remaining material cross-section unsightly appearance also brings with it the already mentioned risk of injury. Since the cutting edges of the punching knife used in the manufacturing process are arranged with their pre-bent ends outside the other cutting or punching plane, the same often breaks or kinks, which renders the entire device unusable for the manufacturing process, which interferes with the perforation line production and therefore the process is interrupted.
  • the invention has for its object to provide an inexpensive method for producing perforation lines in corrugated cardboard, which does not have the disadvantages described above, in particular allows a favorable tearing process of the corrugated cardboard material while avoiding any risk of injury.
  • a corresponding object is achieved by a method having the features of claim 1.
  • a corrugated cardboard product can be produced in such a process, which, as a container or packaging, can be easily opened along the perforation line thus created with very low opening forces, a clean tear-off edge being created along the perforation line that is so smooth that one There is no longer any risk of injury.
  • a corrugated cardboard material in this way, safe storage of goods in the corrugated cardboard products is ensured in the closed state, that is to say when the perforation is not open.
  • the respective punching knife is arranged in a punching tool which can be moved up and down between spring elements which hold down the corrugated cardboard as a punching sheet on a punching plate for the perforation process.
  • the corrugated cardboard material that can be transported through the device can be provided in this way in large quantities and automatically with the novel perforation line according to the manufacturing process.
  • the first and the second cutting line run parallel to one another and the further cutting edges are longer in the direction of the cutting line than the cutting edges and are arranged between them.
  • the scribe line produced along the one cutting line compared to the cutting line made along the other cutting line longer.
  • the cutting lines are arranged in a straight line or following a predeterminable curve shape which corresponds to the perforation line to be produced.
  • perforation lines or tear-open perforations can be produced that do not need to run in a straight line, but rather have an arc or some other curved contour in the corrugated cardboard plane, along which the one corrugated cardboard part can then be separated from the adjacent opposite corrugated cardboard parts.
  • this has a curvature with its cutting edges in the punching direction such that only a part of the cutting edges is in engagement with the corrugated cardboard when the punching knife rolls off to produce the perforation line.
  • the respective cutting edge has at least one cutting surface and the cutting surfaces of the further cutting edges open into the surroundings between the cutting surfaces of the individual cutting edges and above their cutting edges. Because of this configuration, the respective cutting edge of the punching knife can be produced inexpensively using a correspondingly designed grinding machine, which in turn makes the manufacturing process inexpensive, since the punching knife representing a wearing part must be replaced with a new one from time to time.
  • the cutting surfaces, at least part of the cutting edges, run towards the cutting edges in a roof-like manner and / or the other part of the cutting edges has only one cutting surface each, which coincides with the cutting surface of the respectively adjacent cutting edge covered crossing to the cutting lines. If the cutting edges in question are arranged in a roof-like manner, high cutting forces can be applied and the service life is increased due to the uniform introduction of the cutting forces into the punching knife.
  • the other cutting surface geometry mentioned which can be provided as an alternative or in addition to the roof-like cutting edges in the punching knife, only one cutting surface of each cutting edge has to be machined, which lowers the manufacturing costs of the device.
  • the cutting surfaces can also be oriented in one direction, so that the cutting edges of the cutting edges lie in one plane with the front or back of the punching knife.
  • At least one punching knife 14 which can be brought into engagement with the corrugated cardboard 12 is provided, as is partially shown in a side view in FIG.
  • the punching knife 14 which consists of a flat metal blank, has individual cutting edges 16 on its lower processing side as seen in FIG. 1, which have a definable axial distance from one another and whose cutting edges 18 are arranged along a first, partly fictitious cutting line 20.
  • further cutting edges 22 are present, the cutting edges 24 of which, set back in the direction of the engagement, run in one plane along a second cutting line 26, which is different from the first cutting line 20 and runs parallel to the latter, as is particularly shown in FIG. 1 and 2a, 2b.
  • each cutting edge 16, 22 has two cutting surfaces 28, 30, which preferably run towards one another at an acute angle to the cutting edges 18 and 24, respectively.
  • the cutting 16, 22 are thus arranged in two groups 16 and 22 separated from one another in an alternating sequence along the cutting lines 20 and 26.
  • the cutting edges 16 and 22 each have only one inclined cutting surface 28, 30, that with the cutting surface 30 or 28 of the respectively adjacent cutting edge 22 or 18 overlap crosswise to the cutting lines 20, 26, as shown on the end face in FIG. 4.
  • all of the cutting edges 16, 22 can also be aligned uniformly on one side.
  • the cutting surfaces 28, 30 of cutting edges 16 and 22 may have a different inclination to one another, provided that the machining task makes this appear expedient.
  • FIGS. 5 and 6 shows the reception of the punching knife in a punching tool 32 of the punching device according to the invention designed as a flat plate.
  • a punching plate 34 is provided opposite the punching tool 32 as a counter-holder, so that between the actual punching tool 32 with the respective punching knife 14 and the punching plate 34 underneath it, the corrugated cardboard blank 12 can be moved in cycles depending on the movement position of the device.
  • the corrugated cardboard blank 12 shown partially as a punched sheet in FIGS. 5 and 6 has a shaft 36 and two cover layers 38.
  • the punching tool 32 can be moved up and down in the direction of the double arrow; however, it is also possible to keep the punch 32 at rest and to move the punch plate 34 up and down or to obtain the movement in question by a relative movement of the punch tool 32 and the punch plate 34.
  • the respective punching knife 14 is guided between spring elements 40 of the device, in particular in the form of rubber elements that corrugated cardboard 12 for the perforation process Hold down on the punch plate 34 and also facilitate the return of the punch tool 32 with the punch knife 14.
  • 5 and 6 correspond in the direction of the section lines IIa-IIa, IIb-IIb in FIG.
  • FIGS. 9a and b for a partially reproduced corrugated cardboard cutout 12, FIG. 9a relating to the front of the corrugated cardboard and FIG. 9b to the rear, looking in the direction of the 5 and 6 seen at the top and is therefore arranged above the front.
  • the continuous separating points 42 shown in FIG. 9 a and produced by means of the cutting edges 16 in the corrugated cardboard material 12 with the method according to the invention are shown on the back in FIG. 9 b, whereby roof-like recesses 44 are pressed into the drawing plane and the corrugated cardboard material 12 due to the cutting edge geometry or be impressed.
  • a scribe line 46 which can be generated by means of the cutting edges 22 and which in any case leaves at least the outer edge region of the lower cover layer 38 of the corrugated cardboard material 12 untouched.
  • This configuration results in a corrugated cardboard product with a perforation line 10 along which the corrugated cardboard can be easily bent or bent and which is also easy to tear open, with only minimal unevenness, which is in the tenths of a millimeter range, along the tear line. This effectively counteracts the risk of injury.
  • the cutting lines 20, 26 can also follow a predeterminable curve or other geometries running in parallel planes, which leads to changed perforation lines, which can also run, for example, in an arc shape to form an opening flap in the corrugated cardboard product.
  • the punching knife need not be part of the punching device described according to FIGS. 5 and 6, but can also be arranged as a radial tool on a rotating punching or rotating roller, the curvature of the punching knife then being dimensioned such that when the roller rolls off for Generating the perforation line is always only a part of the cutting edges 16, 22 in engagement with the corrugated cardboard material 12.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)

Abstract

The device comprises separate blades (16) positioned beside additional blades (22). The cutting edges (24) of the additional blades run along a second cutting line differing from the first cutting line (20) from which it is spaced apart. The two cutting lines are parallel with each other. The additional blades are longer in the direction of the cutting lines than the blades (16) between which they are positioned. The cutting lines are straight or follow a pre-set curvature corresponding to the perforation line being produced. The punching tool produces the perforation line by only part of the blades engaging with the corrugated paper.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von Perforationslinien in Wellpappe, bei dem mit mindestens einem in Eingriff mit der Wellpappe bringbaren Stanzmesser, das einzelne Schneiden aufweist, die einen vorgebbaren Abstand voneinander einnehmen und deren Schneidkanten längs einer ersten Schneidlinie angeordnet sind, die Wellpappe entlang von durchgehenden, einen Abstand voneinander aufweisenden Trennstellen durchtrennt wird.The invention relates to a method for producing perforation lines in corrugated cardboard, in which with at least one punching knife which can be brought into engagement with the corrugated cardboard and which has individual cutting edges which take a predeterminable distance from one another and whose cutting edges are arranged along a first cutting line, the corrugated cardboard along continuous, spaced apart separation points is severed.

Bei den bekannten gattungsgemäßen Verfahren wird in dem Wellpappenmaterial eine Perforationslinie erzeugt, die in definierten Abständen Schnittlinien aufweist, die die Wellpappe vollständig durchtrennen. Längs dahingehender Perforationslinien läßt sich die Wellpappe zur Formung von Transportbehältnissen leicht knicken oder umlegen, selbst wenn das Wellpappenmaterial stärker ausgebildet ist. Soll das angesprochene Transportbehältnis jedoch längs einer dahingehenden Perforationslinie durch Aufreißen, beispielsweise eines Deckelteiles des Behältnisses, geöffnet werden, sind hierfür große Öffnungskräfte erforderlich und häufig kommt es an den Verbindungsstellen des Wellpappenmaterials längs der Perforationslinie zu einem seitlichen Einreißen der Wellpappe, was den Öffnungsvorgang erschwert oder gar unmöglich macht, wenn beispielsweise ein Teil des Deckels dabei abreißt. Ferner entsteht auch bei günstig verlaufendem Aufreißvorgang längs der Perforationslinie eine sehr ungleich verlaufende Aufreißlinie mit Vorständen und Kerben, die den späteren Entnahmevorgang des in dem Behältnis aufgenommenen Gutes erschweren und unter Umständen sogar eine Verletzungsgefahr an dem harten Wellpappenmaterial mit sich bringen.In the known methods of the generic type, a perforation line is generated in the corrugated cardboard material which has cut lines at defined intervals which completely cut through the corrugated cardboard. The corrugated cardboard can easily be bent or folded over along the perforation lines to form transport containers, even if the corrugated cardboard material is made stronger. However, if the addressed transport container is to be opened along a relevant perforation line by tearing open, for example a lid part of the container large opening forces are required for this and often there is a lateral tearing of the corrugated cardboard at the connection points of the corrugated cardboard material along the perforation line, which makes the opening process difficult or even impossible if, for example, part of the cover tears off. Furthermore, even with a favorable tearing process along the perforation line, a very uneven tearing line with boards and notches arises, which complicate the later removal process of the goods accommodated in the container and may even result in a risk of injury to the hard corrugated cardboard material.

Bei einem anderen gattungsgemäßen Verfahren, wie es der Fachwelt bekannt ist, ist zwar schon vorgeschlagen worden, anstelle eines Stanzmessers mit geradlinigen Schneiden zum Herstellen einer geradlinigen Perforationslinie Schneiden einzusetzen, die im Abstand voneinander in eine Richtung gesehen am Ende um 30° oder 45° derart abgewinkelt sind, daß eine Art wellenförmige Perforationslinie in dem Wellpappenmaterial erzeugt wird, bei der die einander benachbart gegenüberliegenden und von der Perforationslinie getrennten Wellpappenteile nur noch über einen sehr kleinen Materialquerschnitt miteinander verbunden werden, der innerhalb des entstehenden Wellenberges liegt. Obwohl der verbindende Materialquerschnitt gegenüber der eingangs erwähnten Perforationslinie sehr gering und damit für eine Trennung des Materials geschwächt ist, was die Aufreißkräfte verringert, kommt es auch hier über den verbleibenden Materialquerschnitt dennoch zu Hemmnissen beim Öffnen der Verpackung und zu einer unsauberen Aufreißkante, die neben einem unschönen Aussehen auch die bereits erwähnte Verletzungsgefahr mit sich bringt. Da die Schneiden des beim Herstellverfahren verwendeten Stanzmessers mit ihren vorgebogenen Enden außerhalb der sonstigen Schneid- oder Stanzebene angeordnet sind, kommt es darüber hinaus häufig zu einem Abbrechen oder Abknicken derselben, was die gesamte Vorrichtung für das Herstellverfahren unbrauchbar werden läßt, die Perforationslinienerzeugung stört und mithin das Verfahren unterbricht.In another generic method, as is known to those skilled in the art, it has already been proposed to use instead of a punching knife with straight edges to produce a straight line of perforations, which are spaced apart in one direction at the end by 30 ° or 45 ° are angled so that a kind of wavy perforation line is produced in the corrugated cardboard material, in which the corrugated cardboard parts lying opposite one another and separated from the perforation line are only connected to one another via a very small material cross section, which lies within the resulting corrugated rock. Although the connecting material cross-section is very small compared to the perforation line mentioned at the beginning and is therefore weakened for a separation of the material, which reduces the tear forces, there are still obstacles when opening the packaging and an unclean tear-open edge due to the remaining material cross-section unsightly appearance also brings with it the already mentioned risk of injury. Since the cutting edges of the punching knife used in the manufacturing process are arranged with their pre-bent ends outside the other cutting or punching plane, the same often breaks or kinks, which renders the entire device unusable for the manufacturing process, which interferes with the perforation line production and therefore the process is interrupted.

Durch die DE-PS 671 344 ist ein Verfahren zur Erleichterung des Umbiegens von Wellpappenmaterial bekannt, bei dem eine Biegekante durch eine größere Anzahl von Ritzungen eines Stanzmessers in der Weise gebildet wird, daß zwischen je zwei Ritzungen ein kurzer Zwischenraum verbleibt, in dem der Werkstoff nicht geschwächt wird. Diese nicht geschwächten Stellen bieten einen genügenden Zusammenhalt der Zuschnitteile, selbst wenn die mittels der Schneiden des Stanzmessers eingebrachten Ritzeinschnitte im Sinne einer Trennstelle den Zuschnitt vollkommen durchdringen, was jedoch in der Regel nicht der Fall ist. Mit diesem gattungsfremden bekannten Verfahren ist eine Aufreißperforation im Sinne der Erfindung nicht herstellbar.From DE-PS 671 344 a method for facilitating the bending of corrugated cardboard material is known, in which a bending edge is formed by a larger number of scratches in a punching knife in such a way that there is a short space between two scratches in which the material is not weakened. These non-weakened points offer sufficient cohesion of the cut parts, even if the incisions made by means of the cutting knife's cutting edge completely penetrate the cut in the sense of a separating point, but this is generally not the case. A tear-open perforation in the sense of the invention cannot be produced with this method, which is known from outside the category.

Bei anderen bekannten gattungsfremden Verfahren werden zum Herstellen von Verpackungen oder Behältnissen, die einteilig ausgebildet sind, beispielsweise in Form einer Wellkiste, die aus Wellpappe bestehenden Boden- und Deckelklappen mit Klebestreifen oder Heißleim und/oder Metallklammern verschlossen, so daß zum Öffnen Hilfsmittel, wie Messer oder Schere, notwendig sind, die wiederum entsprechende Verletzungsgefahren mit sich bringen und darüber hinaus das Öffnen der jeweiligen Verpackung zeitaufwendig gestalten.In other known non-generic methods for the manufacture of packaging or containers that are formed in one piece, for example in the form of a corrugated box, the bottom and lid flaps made of corrugated cardboard are sealed with adhesive strips or hot glue and / or metal clips, so that tools such as knives can be opened or scissors are necessary, which in turn entail corresponding risk of injury and moreover make opening the respective packaging time-consuming.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein kostengünstiges Verfahren zum Herstellen von Perforationslinien in Wellpappe zu schaffen, das die oben beschriebenen Nachteile nicht aufweist, insbesondere einen günstig verlaufenden Aufreißvorgang des Wellpappenmaterials unter Vermeidung einer etwaigen Verletzungsgefahr erlaubt. Eine dahingehende Aufgabe löst ein Verfahren mit den Merkmalen des Anspruches 1.Based on this prior art, the invention has for its object to provide an inexpensive method for producing perforation lines in corrugated cardboard, which does not have the disadvantages described above, in particular allows a favorable tearing process of the corrugated cardboard material while avoiding any risk of injury. A corresponding object is achieved by a method having the features of claim 1.

Dadurch, daß bei dem erfindungsgemäßen Verfahren nach dem Anspruch 1 gemäß den Merkmalen des kennzeichnenden Teiles mit weiteren, neben den Schneiden vorhandenen Schneiden des Stanzmessers, deren Schneidkanten längs einer zweiten, von der ersten Schneidlinie verschiedenen Schneidlinie verlaufen, die zwischen den Trennstellen verbleibende Wellpappe längs einer Ritzlinie geritzt wird, wird eine neuartige Perforationslinie in der Wellpappe erzeugt, bei der ein Teil der Wellpappe vollständig durchschnitten wird, der verbleibende Teil aber nur eingeritzt ist. In Abhängigkeit von der Wellendicke, der Wellenkombination, der Papierstärke und -qualität der Wellpappe, wird diese neben den vollständig durchtrennten Stellen derart eingeritzt, daß im wesentlichen nur noch die äußerste Lage der Wellpappe zwischen den vollständig durchtrennten Stellen längs der Perforationslinie verbleibt. Es ist überraschend, daß bei einem dahingehenden Verfahren ein Wellpappenerzeugnis herstellbar ist, das als Behältnis oder Verpackung geformt sich längs der derart erstellten Perforationslinie mit sehr geringen Öffnungskräften einfachst öffnen läßt, wobei eine saubere Abrißkante längs der Perforationslinie entsteht, die derart glatt ist, daß eine Verletzungsgefahr nicht mehr besteht. Trotz des derart geschwächten Wellpappenmaterials ist aber im geschlossenen Zustand, also bei nicht geöffneter Perforation, eine sichere Bevorratung von Gütern in den Wellpappenerzeugnissen gewährleistet.Characterized in that in the inventive method according to claim 1 according to the features of the characterizing part with further, in addition to the cutting edges of the cutting knife, the cutting edges of which run along a second cutting line different from the first cutting line, which between If the corrugated cardboard remaining at the separation points is scored along a scoring line, a new type of perforation line is created in the corrugated cardboard, in which a part of the corrugated cardboard is completely cut through, but the remaining part is only incised. Depending on the wave thickness, the wave combination, the paper thickness and quality of the corrugated cardboard, it is incised in addition to the completely severed points such that essentially only the outermost layer of the corrugated cardboard remains between the completely severed points along the perforation line. It is surprising that a corrugated cardboard product can be produced in such a process, which, as a container or packaging, can be easily opened along the perforation line thus created with very low opening forces, a clean tear-off edge being created along the perforation line that is so smooth that one There is no longer any risk of injury. Despite the weakening of the corrugated cardboard material in this way, safe storage of goods in the corrugated cardboard products is ensured in the closed state, that is to say when the perforation is not open.

Bei der erfindungsgemäßen Vorrichtung zum Durchführen des Verfahrens ist das jeweilige Stanzmesser in einem auf- und abbewegbaren Stanzwerkzeug zwischen Federelementen angeordnet, die die Wellpappe als Stanzbogen auf einer Stanzplatte für den Perforationsvorgang niederhalten. Das durch die Vorrichtung hindurch transportierbare Wellpappenmaterial läßt sich auf diese Art und Weise in großen Stückzahlen und automatisiert mit der neuartigen Perforationslinie nach dem Herstellverfahren versehen.In the device according to the invention for carrying out the method, the respective punching knife is arranged in a punching tool which can be moved up and down between spring elements which hold down the corrugated cardboard as a punching sheet on a punching plate for the perforation process. The corrugated cardboard material that can be transported through the device can be provided in this way in large quantities and automatically with the novel perforation line according to the manufacturing process.

Bei dem erfindungsgemäßen Stanzmesser zum Durchführen des Verfahrens und/oder zum Einsatz bei der angesprochenen Vorrichtung verlaufen die erste und die zweite Schneidlinie parallel zueinander und die weiteren Schneiden sind in Richtung der Schneidlinie länger ausgebildet als die Schneiden und zwischen diesen angeordnet. Hierdurch ist die längs der einen Schneidlinie hergestellte Ritzlinie gegenüber der längs der anderen Schneidlinie hergestellten Schnittlinie länger ausgebildet.In the punch knife according to the invention for carrying out the method and / or for use in the device mentioned, the first and the second cutting line run parallel to one another and the further cutting edges are longer in the direction of the cutting line than the cutting edges and are arranged between them. As a result, the scribe line produced along the one cutting line compared to the cutting line made along the other cutting line longer.

Bei einer bevorzugten Ausführungsform des erfindungsgemäßen Stanzmessers sind die Schneidlinien geradlinig oder einem vorgebbaren Kurvenverlauf folgend angeordnet, der der zu erzeugenden Perforationslinie entspricht. Hierdurch lassen sich Perforationslinien oder Aufreißperforationen erzeugen, die nicht geradlinig verlaufen zu brauchen, sondern vielmehr in der Wellpappenebene einen Bogen oder eine sonstige gekrümmte Kontur aufweisen, längs der sich dann das eine Wellpappenteil von den benachbart gegenüberliegenden Wellpappenteilen trennen läßt.In a preferred embodiment of the punching knife according to the invention, the cutting lines are arranged in a straight line or following a predeterminable curve shape which corresponds to the perforation line to be produced. In this way, perforation lines or tear-open perforations can be produced that do not need to run in a straight line, but rather have an arc or some other curved contour in the corrugated cardboard plane, along which the one corrugated cardboard part can then be separated from the adjacent opposite corrugated cardboard parts.

Bei einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Stanzmessers weist dieses mit seinen Schneiden in Stanzrichtung gesehen derart eine Krümmung auf, daß beim Abrollen des Stanzmessers zum Erzeugen der Perforationslinie immer nur ein Teil der Schneiden in Eingriff mit der Wellpappe ist. Mit dieser Ausgestaltung ist es möglich, das Stanzmesser nicht nur auf einer ebenen Platte, sondern vielmehr auf einer drehbaren Walze anzuordnen und hiermit die Perforationslinie zu erzeugen, so daß das erfindungsgemäße Stanzmesser bei unterschiedlichsten Maschinentypen ohne weiteres durch Nachrüsten einsetzbar ist.In a further preferred embodiment of the punching knife according to the invention, this has a curvature with its cutting edges in the punching direction such that only a part of the cutting edges is in engagement with the corrugated cardboard when the punching knife rolls off to produce the perforation line. With this configuration, it is possible to arrange the punching knife not only on a flat plate, but rather on a rotatable roller, and thereby to produce the perforation line, so that the punching knife according to the invention can be used easily by retrofitting in the most varied of machine types.

Bei einer besonders bevorzugten Ausführungsform des erfindungsgemäßen Stanzmessers weist die jeweilige Schneide mindestens eine Schneidfläche auf und die Schneidflächen der weiteren Schneiden münden zwischen den Schneidflächen der einzelnen Schneiden und oberhalb deren Schneidkanten mit ihren Schneidkanten in die Umgebung. Aufgrund dieser Ausgestaltung ist ein kostengünstiges Herstellen der jeweiligen Schneide des Stanzmessers mit einer entsprechend ausgebildeten Schleifmaschine möglich, was wiederum das Herstellverfahren kostengünstig gestaltet, da von Zeit zu Zeit das ein Verschleißteil darstellende Stanzmesser gegen ein neues auszutauschen ist.In a particularly preferred embodiment of the punching knife according to the invention, the respective cutting edge has at least one cutting surface and the cutting surfaces of the further cutting edges open into the surroundings between the cutting surfaces of the individual cutting edges and above their cutting edges. Because of this configuration, the respective cutting edge of the punching knife can be produced inexpensively using a correspondingly designed grinding machine, which in turn makes the manufacturing process inexpensive, since the punching knife representing a wearing part must be replaced with a new one from time to time.

Bei einer weiteren, besonders bevorzugten Ausführungsform des erfindungsgemäßen Stanzmessers laufen die Schneidflächen, zumindest eines Teiles der Schneiden, zu den Schneidkanten hin dachartig zu und/oder der andere Teil der Schneiden weist nur jeweils eine Schneidfläche auf, die mit der Schneidfläche der jeweils benachbarten Schneide sich quer zu den Schneidlinien kreuzend überdeckt. Sofern die in Rede stehenden Schneidkanten dachartig angeordnet sind, lassen sich hohe Schneidkräfte aufbringen und aufgrund der gleichmäßigen Einleitung der Schneidkräfte in das Stanzmesser ist dessen Standzeit erhöht. Bei der anderen angesprochenen Schneidflächengeometrie, die alternativ oder zusätzlich zu den dachartigen Schneidkanten bei dem Stanzmesser vorgesehen sein kann, muß immer nur eine Schneidfläche einer jeden Schneide bearbeitet werden, was die Herstellkosten der Vorrichtung senkt. Insbesondere, wenn die Dicke des Wellpappenmaterials schwach ausgebildet ist, können die Schneidflächen sich auch in einer Richtung orientieren, so daß die Schneidkanten der Schneiden in einer Ebene mit der Vorder- oder Rückseite des Stanzmessers liegen.In a further, particularly preferred embodiment of the punching knife according to the invention, the cutting surfaces, at least part of the cutting edges, run towards the cutting edges in a roof-like manner and / or the other part of the cutting edges has only one cutting surface each, which coincides with the cutting surface of the respectively adjacent cutting edge covered crossing to the cutting lines. If the cutting edges in question are arranged in a roof-like manner, high cutting forces can be applied and the service life is increased due to the uniform introduction of the cutting forces into the punching knife. In the other cutting surface geometry mentioned, which can be provided as an alternative or in addition to the roof-like cutting edges in the punching knife, only one cutting surface of each cutting edge has to be machined, which lowers the manufacturing costs of the device. In particular, if the thickness of the corrugated cardboard material is weak, the cutting surfaces can also be oriented in one direction, so that the cutting edges of the cutting edges lie in one plane with the front or back of the punching knife.

Im folgenden sind das erfindungsgemäße Verfahren sowie die Vorrichtung und das Stanzmesser anhand der Zeichnung näher erläutert.The method according to the invention and the device and the punching knife are explained in more detail below with reference to the drawing.

Es zeigen:

Fig.1
in Seitenansicht ein Teil des Stanzmessers der Vorrichtung;
Fig.2a,b
eine erste Art von Schneidengeometrie, gesehen längs der Linie IIa-IIa, IIb-IIb in Fig.1;
Fig.3a,3b und 4
eine andere Art von Schneidengeometrie längs der Linie IIIa-IIIa, IIIb-IIIb in Fig.1, wobei die Fig.4 eine Stirnansicht auf das Stanzmesser mit der dahingehenden Schneidengeometrie darstellt;
Fig.5 und 6
eine Seitendarstellung auf die Stanzvorrichtung mit dem im Eingriff mit der Wellpappe sich befindenden Stanzmesser, betrachtet in den Ebenen IIa-IIa und IIb-IIb in der Fig.1;
Fig.7 und 8
eine Draufsicht auf einen Ausschnitt einer Wellpappe, die mit üblichen Perforationslinien versehen ist;
Fig.9a,9b
eine Vorderansicht bzw. eine Rückansicht auf einen Wellpappenausschnitt mit einer mit der erfindungsgemäßen Vorrichtung erzeugten Perforationslinie.
Show it:
Fig. 1
in side view a part of the punch knife of the device;
2a, b
a first type of cutting geometry, seen along the line IIa-IIa, IIb-IIb in Fig.1;
3a, 3b and 4
another type of cutting geometry along the line IIIa-IIIa, IIIb-IIIb in Figure 1, Figure 4 is an end view of the punch knife with the relevant cutting geometry;
Fig. 5 and 6
a side view of the punching device with the punching knife in engagement with the corrugated cardboard, viewed in planes IIa-IIa and IIb-IIb in FIG. 1;
Fig. 7 and 8
a plan view of a section of a corrugated cardboard which is provided with conventional perforation lines;
Fig.9a, 9b
a front view or a rear view of a corrugated cardboard cutout with a perforation line generated with the device according to the invention.

Zum Herstellen von Perforationslinien 10 in Wellpappe 12 ist mindestens ein in Eingriff mit der Wellpappe 12 bringbares Stanzmesser 14 vorgesehen, wie es teilweise in einer Seitendarstellung in der Fig.1 gezeigt ist. Das aus einem flachen Metallzuschnitt bestehende Stanzmesser 14 weist auf seiner in der Fig.1 gesehen unteren Bearbeitungsseite einzelne Schneiden 16 auf, die einen vorgebbaren axialen Abstand voneinander einnehmen und deren Schneidkanten 18 längs einer ersten, zum Teil fiktiv verlaufenden Schneidlinie 20 angeordnet sind. Neben den bereits bezeichneten Schneiden 16 sind weitere Schneiden 22 vorhanden, deren Schneidkanten 24 in Richtung des Eingriffs in einer Ebene zurückversetzt längs einer zweiten Schneidlinie 26 verlaufen, die von der ersten Schneidlinie 20 verschieden ist und parallel zu dieser verläuft, wie dies insbesondere die Fig.1 und 2a,2b zeigen.To produce perforation lines 10 in corrugated cardboard 12, at least one punching knife 14 which can be brought into engagement with the corrugated cardboard 12 is provided, as is partially shown in a side view in FIG. The punching knife 14, which consists of a flat metal blank, has individual cutting edges 16 on its lower processing side as seen in FIG. 1, which have a definable axial distance from one another and whose cutting edges 18 are arranged along a first, partly fictitious cutting line 20. In addition to the cutting edges 16 already described, further cutting edges 22 are present, the cutting edges 24 of which, set back in the direction of the engagement, run in one plane along a second cutting line 26, which is different from the first cutting line 20 and runs parallel to the latter, as is particularly shown in FIG. 1 and 2a, 2b.

Wie sich dies aus der Fig.1 ergibt, sind die weiteren Schneiden 22 in Richtung der Schneidlinien 20 und 26 länger ausgebildet als die Schneiden 16 und zwischen diesen angeordnet. Die jeweilige Schneide 16,22 weist mindestens eine Schneidfläche 28,30 auf, wobei die Schneidflächen 30 der weiteren Schneiden 22 zwischen den Schneidflächen 28 der einzelnen Schneiden 16 und oberhalb deren Schneidkanten 18 mit ihren Schneidkanten 24 in die Umgebung münden. Bei der Ausführungsform eines Stanzmessers 14 nach den Fig.2a und 2b weist jede Schneide 16,22 zwei Schneidflächen 28,30 auf, die zu den Schneidkanten 18 bzw. 24 dachartig vorzugsweise in einem spitzen Winkel aufeinander zulaufen. Die Schneiden 16,22 sind also in zwei Gruppen 16 bzw. 22 voneinander getrennt in alternierender Reihenfolge längs den Schneidlinien 20 und 26 angeordnet.As can be seen from FIG. 1, the further cutting edges 22 in the direction of the cutting lines 20 and 26 are longer than the cutting edges 16 and are arranged between them. The respective cutting edge 16, 22 has at least one cutting surface 28, 30, the cutting surfaces 30 of the further cutting edges 22 opening into the environment between the cutting surfaces 28 of the individual cutting edges 16 and above their cutting edges 18 with their cutting edges 24. In the embodiment of a punching knife 14 according to FIGS. 2a and 2b, each cutting edge 16, 22 has two cutting surfaces 28, 30, which preferably run towards one another at an acute angle to the cutting edges 18 and 24, respectively. The cutting 16, 22 are thus arranged in two groups 16 and 22 separated from one another in an alternating sequence along the cutting lines 20 and 26.

Bei einer anderen Ausführungsform des erfindungsgemäßen Stanzmessers 14 nach den Fig.3a,3b und 4, die mit denselben Bezugszeichen versehen sind wie die erste Ausführungsform, weisen die Schneiden 16 und 22 nur jeweils eine schräg verlaufende Schneidfläche 28,30 auf, die mit der Schneidfläche 30 bzw. 28 der jeweils benachbarten Schneide 22 bzw. 18 sich quer zu den Schneidlinien 20,26, wie in Fig.4 stirnseitig dargestellt, kreuzend überdecken. Bei einer nicht dargestellten erfindungsgemäßen Ausführungsform können auch alle Schneiden 16,22 nach einer Seite hin gleichförmig ausgerichtet sein. Ferner können insbesondere die Schneidflächen 28,30 von Schneiden 16 und 22 zueinander eine jeweils andere Neigung einnehmen, sofern die Bearbeitungsaufgabe dies zweckmäßig erscheinen läßt.In another embodiment of the punching knife 14 according to the invention according to FIGS. 3a, 3b and 4, which are provided with the same reference numerals as the first embodiment, the cutting edges 16 and 22 each have only one inclined cutting surface 28, 30, that with the cutting surface 30 or 28 of the respectively adjacent cutting edge 22 or 18 overlap crosswise to the cutting lines 20, 26, as shown on the end face in FIG. 4. In an embodiment according to the invention, not shown, all of the cutting edges 16, 22 can also be aligned uniformly on one side. Furthermore, in particular, the cutting surfaces 28, 30 of cutting edges 16 and 22 may have a different inclination to one another, provided that the machining task makes this appear expedient.

Die Darstellung in den Fig.5 und 6 zeigt die Aufnahme des Stanzmessers in einem als ebene Platte ausgebildeten Stanzwerkzeug 32 der erfindungsgemäßen Stanzvorrichtung. Dem Stanzwerkzeug 32 gegenüberliegend ist als Gegenhalter eine Stanzplatte 34 vorgesehen, so daß zwischen dem eigentlichen Stanzwerkzeug 32 mit dem jeweiligen Stanzmesser 14 und der darunterliegenden Stanzplatte 34 der Wellpappenzuschnitt 12 taktweise in Abhängigkeit von der Bewegungsstellung der Vorrichtung hindurchbewegbar ist.The illustration in FIGS. 5 and 6 shows the reception of the punching knife in a punching tool 32 of the punching device according to the invention designed as a flat plate. A punching plate 34 is provided opposite the punching tool 32 as a counter-holder, so that between the actual punching tool 32 with the respective punching knife 14 and the punching plate 34 underneath it, the corrugated cardboard blank 12 can be moved in cycles depending on the movement position of the device.

Der in den Fig.5 und 6 als Stanzbogen teilweise dargestellte Wellpappenzuschnitt 12 weist eine Welle 36 auf sowie zwei Decklagen 38. Im vorliegenden Fall ist das Stanzwerkzeug 32 in Richtung des Doppelpfeiles auf- und abbewegbar; es ist jedoch auch möglich, das Stanzwerkzeug 32 in Ruhe zu halten und die Stanzplatte 34 auf und ab zu bewegen oder die dahingehende Bewegung durch eine Relativbewegung von Stanzwerkzeug 32 und Stanzplatte 34 zu erhalten. Das jeweilige Stanzmesser 14 ist zwischen Federelementen 40 der Vorrichtung geführt, insbesondere in Form von Gummielementen, die die Wellpappe 12 für den Perforationsvorgang auf der Stanzplatte 34 niederhalten und darüber hinaus die Rückführung des Stanzwerkzeuges 32 mit dem Stanzmesser 14 erleichtern. Die Fig.5 und 6 entsprechen in Richtung der Schnittlinien IIa-IIa,IIb-IIb in Fig.1 gesehen einer Bearbeitungssituation eines Stanzmessers 14, bei dem die jeweilige Schneide 16 des Stanzmessers 14 die Wellpappe 12 völlig durchtrennt, wohingegen die in der Reihe jeweils nachfolgende Schneide 22 nur die obere Decklage 38 sowie die Welle 12 in definierten Abständen voneinander ritzend durchtrennt, jedoch nicht die untere Decklage 38, so daß die dahingehenden Schneiden 22 also ausschließlich einen Ritzvorgang im Wellpappenmaterial 12 als Trennschnitt bei dem Herstellverfahren durchführen.The corrugated cardboard blank 12 shown partially as a punched sheet in FIGS. 5 and 6 has a shaft 36 and two cover layers 38. In the present case, the punching tool 32 can be moved up and down in the direction of the double arrow; however, it is also possible to keep the punch 32 at rest and to move the punch plate 34 up and down or to obtain the movement in question by a relative movement of the punch tool 32 and the punch plate 34. The respective punching knife 14 is guided between spring elements 40 of the device, in particular in the form of rubber elements that corrugated cardboard 12 for the perforation process Hold down on the punch plate 34 and also facilitate the return of the punch tool 32 with the punch knife 14. 5 and 6 correspond in the direction of the section lines IIa-IIa, IIb-IIb in FIG. 1 to a processing situation of a punching knife 14, in which the respective cutting edge 16 of the punching knife 14 completely cuts through the corrugated cardboard 12, whereas those in the row in each case Subsequent cutting edge 22 only cuts through the upper cover layer 38 and the shaft 12 at defined intervals from one another, but not the lower cover layer 38, so that the cutting edges 22 in question therefore only carry out a scribing process in the corrugated cardboard material 12 as a separating cut in the manufacturing process.

Bei einem dahingehenden Herstellvorgang entsteht eine Perforationslinie 10, wie sie in den Fig.9a und b für einen teilweise wiedergegebenen Wellpappenausschnitt 12 dargestellt ist, wobei die Fig.9a die Vorderseite der Wellpappe und die Fig.9b die Rückseite betrifft, die in Blickrichtung auf die Fig.5 und 6 gesehen zuoberst und mithin oberhalb der Vorderseite angeordnet ist. Die in der Fig.9a gezeigten und mittels der Schneiden 16 im Wellpappenmaterial 12 mit dem erfindungsgemäßen Verfahren erzeugten durchgehenden Trennstellen 42 sind in der Fig.9b rückseitig dargestellt, wobei bedingt durch die Schneidengeometrie in die Zeichenebene und das Wellpappenmaterial 12 hinein dachartige Ausnehmungen 44 eingepreßt oder eingeprägt werden. Zwischen diesen Trennstellen 42 und nur von diesen unterbrochen verläuft eine Ritzlinie 46, die mittels der Schneiden 22 erzeugbar ist und die auf jeden Fall zumindest den äußeren Randbereich der unteren Decklage 38 des Wellpappenmaterials 12 unberührt läßt. Aufgrund dieser Ausgestaltung ergibt sich ein Wellpappenerzeugnis mit einer Perforationslinie 10, längs der sich die Wellpappe einfach umknicken oder umbiegen läßt und die darüber hinaus leicht aufreißbar ist, wobei nur minimale Unebenheiten, die im zehntel Millimeter-Bereich liegen, längs der Aufreißlinie entstehen. Einer Verletzungsgefahr ist dadurch wirksam begegnet.In the case of a manufacturing process in this way, a perforation line 10 is created, as shown in FIGS. 9a and b for a partially reproduced corrugated cardboard cutout 12, FIG. 9a relating to the front of the corrugated cardboard and FIG. 9b to the rear, looking in the direction of the 5 and 6 seen at the top and is therefore arranged above the front. The continuous separating points 42 shown in FIG. 9 a and produced by means of the cutting edges 16 in the corrugated cardboard material 12 with the method according to the invention are shown on the back in FIG. 9 b, whereby roof-like recesses 44 are pressed into the drawing plane and the corrugated cardboard material 12 due to the cutting edge geometry or be impressed. Between these separating points 42 and only interrupted by them there runs a scribe line 46 which can be generated by means of the cutting edges 22 and which in any case leaves at least the outer edge region of the lower cover layer 38 of the corrugated cardboard material 12 untouched. This configuration results in a corrugated cardboard product with a perforation line 10 along which the corrugated cardboard can be easily bent or bent and which is also easy to tear open, with only minimal unevenness, which is in the tenths of a millimeter range, along the tear line. This effectively counteracts the risk of injury.

Mit den herkömmlichen Perforationslinien, die mit bekannten Verfahren und Vorrichtungen erzeugbar sind, nach den Fig.7 und 8 läßt sich ein dahingehendes Perforationsverhalten nicht erreichen. Zwar weist die Perforationslinie nach der Fig.7 durchgehende Trennstellen auf, der zwischen den Trennstellen verbleibende Querschnittsrest an Wellpappenmaterial erlaubt jedoch nicht ein vorteilhaftes Aufreißverhalten. Dasselbe gilt für die verbesserte Aufreißperforationslinie nach der Fig.8, bei der durch den wellenförmigen Verlauf der Perforationslinie der verbleibende Materialquerschnitt innerhalb der Wellenbögen reduziert ist.With the conventional perforation lines, which can be produced with known methods and devices, according to FIGS. 7 and 8, such a perforation behavior cannot be achieved. Although the perforation line according to FIG. 7 has continuous separation points, the cross-sectional remnant of corrugated cardboard material remaining between the separation points does not permit advantageous tear-open behavior. The same applies to the improved tear-open perforation line according to FIG. 8, in which the remaining material cross-section within the wave arches is reduced due to the undulating course of the perforation line.

Bei einer weiteren, nicht dargestellten Ausgestaltung der Erfindung können die Schneidlinien 20,26 in parallelen Ebenen zueinander verlaufend auch einem vorgebbaren Kurvenverlauf oder sonstigen Geometrien folgen, was zu geänderten Perforationslinien führt, die beispielsweise auch bogenförmig unter Bildung einer Öffnungsklappe im Wellpappenerzeugnis verlaufen können. Ferner braucht das Stanzmesser nicht Teil der beschriebenen Stanzvorrichtung nach den Fig.5 und 6 zu sein, sondern kann als Radialwerkzeug auch auf einer umlaufenden Stanz- oder Drehwalze angeordnet sein, wobei die Krümmung des Stanzmessers dann derart bemessen ist, daß beim Abrollen der Walze zum Erzeugen der Perforationslinie immer nur ein Teil der Schneiden 16,22 in Eingriff mit dem Wellpappenmaterial 12 ist.In a further embodiment of the invention, not shown, the cutting lines 20, 26 can also follow a predeterminable curve or other geometries running in parallel planes, which leads to changed perforation lines, which can also run, for example, in an arc shape to form an opening flap in the corrugated cardboard product. Furthermore, the punching knife need not be part of the punching device described according to FIGS. 5 and 6, but can also be arranged as a radial tool on a rotating punching or rotating roller, the curvature of the punching knife then being dimensioned such that when the roller rolls off for Generating the perforation line is always only a part of the cutting edges 16, 22 in engagement with the corrugated cardboard material 12.

Claims (8)

Verfahren zum Herstellen von Perforationslinien (10) in Wellpappe (12), bei dem mit mindestens einem in Eingriff mit der Wellpappe (12) bringbaren Stanzmesser (14), das einzelne Schneiden (16) aufweist, die einen vorgebbaren Abstand voneinander einnehmen und deren Schneidkanten (18) längs einer ersten Schneidlinie (20) angeordnet sind, die Wellpappe (12) entlang von durchgehenden, einen Abstand voneinander aufweisenden Trennstellen (42) durchtrennt wird, dadurch gekennzeichnet, daß mit weiteren, neben den Schneiden (16) vorhandenen Schneiden (22) des Stanzmessers (14), deren Schneidkanten (24) längs einer zweiten, von der ersten Schneidlinie (20) verschiedenen Schneidlinie (26) verlaufen, die zwischen den Trennstellen (42) verbleibende Wellpappe (12) längs einer Ritzlinie (46) geritzt wird.Method for producing perforation lines (10) in corrugated cardboard (12), in which, with at least one punching knife (14) which can be brought into engagement with the corrugated cardboard (12), has individual cutting edges (16) which have a predeterminable distance from one another and their cutting edges (18) are arranged along a first cutting line (20), the corrugated cardboard (12) is severed along continuous, spaced-apart separating points (42), characterized in that with further cutting edges (22) present next to the cutting edges (16) ) of the punching knife (14), the cutting edges (24) of which run along a second cutting line (26) different from the first cutting line (20), the corrugated cardboard (12) remaining between the separating points (42) is scored along a scoring line (46) . Vorrichtung zum Durchführen des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß das jeweilige Stanzmesser (14) in einem auf- und abbewegbaren Stanzwerkzeug (32) zwischen Federelementen angeordnet ist, die die Wellpappe (12) als Stanzbogen auf einer Stanzplatte (34) für den Perforationsvorgang niederhalten.Apparatus for carrying out the method according to claim 1, characterized in that the respective punching knife (14) is arranged in a punching tool (32) which can be moved up and down between spring elements which the corrugated cardboard (12) acts as a punched sheet on a punching plate (34) for the Hold down the perforation process. Stanzmesser zum Durchführen des Verfahrens nach Anspruch 1 und/oder zum Einsatz bei der Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die erste und die zweite Schneidlinie (20,26) parallel zueinander verlaufen und daß die weiteren Schneiden (22) in Richtung der Schneidlinien (20,26) länger ausgebildet als die Schneiden (16) und zwischen diesen angeordnet sind.Punching knife for performing the method according to claim 1 and / or for use in the device according to claim 2, characterized in that the first and the second cutting line (20, 26) run parallel to one another and in that the further cutting edges (22) in the direction of the cutting lines (20,26) longer than the cutting edges (16) and are arranged between them. Stanzmesser nach Anspruch 3, dadurch gekennzeichnet, daß die Schneidlinien (20,26) geradlinig oder einem vorgebbaren Kurvenverlauf folgend angeordnet sind, der der zu erzeugenden Perforationslinie (10) entspricht.Punching knife according to claim 3, characterized in that the cutting lines (20, 26) are arranged in a straight line or following a predeterminable curve which corresponds to the perforation line (10) to be produced. Stanzmesser nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß es mit seinen Schneiden (16,22) in Stanzrichtung gesehen derart eine Krümmung aufweist, daß beim Abrollen des Stanzmessers (14) zum Erzeugen der Perforationslinie (10) immer nur ein Teil der Schneiden (16,22) in Eingriff mit der Wellpappe (12) ist.Punching knife according to claim 3 or 4, characterized in that with its cutting edges (16, 22) seen in the punching direction it has a curvature such that when the punching knife (14) is unrolled to produce the perforation line (10) only part of the cutting edges ( 16,22) is in engagement with the corrugated cardboard (12). Stanzmesser nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die jeweilige Schneide (16,22) mindestens eine Schneidfläche (28,30) aufweist und daß die Schneidflächen (30) der weiteren Schneiden (22) zwischen den Schneidflächen (28) der einzelnen Schneiden (16) und oberhalb deren Schneidkanten (18) mit ihren Schneidkanten (24) in die Umgebung münden.Punching knife according to one of claims 3 to 5, characterized in that the respective cutting edge (16, 22) has at least one cutting surface (28, 30) and that the cutting surfaces (30) of the further cutting edges (22) between the cutting surfaces (28) of the individual cutting edges (16) and above their cutting edges (18) open into the environment with their cutting edges (24). Stanzmesser nach Anspruch 6, dadurch gekennzeichnet, daß die Schneidflächen (28,30) zumindest eines Teiles der Schneiden (16,22) zu den Schneidkanten (18,24) hin dachartig zulaufen und/oder daß der andere Teil der Schneiden (16,22) nur jeweils eine Schneidfläche (28,30) aufweist, die mit der Schneidfläche (30,28) der jeweils benachbarten Schneide (22,16) sich quer zu den Schneidlinien (20,26) kreuzend überdecken.Punching knife according to claim 6, characterized in that the cutting surfaces (28, 30) of at least part of the cutting edges (16, 22) taper towards the cutting edges (18, 24) and / or that the other part of the cutting edges (16, 22nd ) each has only one cutting surface (28, 30), which overlap with the cutting surface (30, 28) of the respectively adjacent cutting edge (22, 16) crossing the cutting lines (20, 26). Wellpappenerzeugnis, hergestellt mit der Vorrichtung nach Anspruch 2 und/oder mit einem Stanzwerkzeug nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, daß das Erzeugnis mindestens eine Perforationslinie (10), insbesondere in Form einer Aufreißperforationslinie, aufweist, die in vorgebbaren Abständen mittels den Schneiden (16) im Wellpappenmaterial (12) erzeugte durchgehende Trennstellen (42) aufweist, zwischen denen das Wellpappenmaterial (12) mittels der weiteren Schneiden (22) unter Bildung einer Ritzlinie (46) geritzt ist.Corrugated cardboard product, produced with the device according to claim 2 and / or with a punching tool according to one of claims 3 to 7, characterized in that the product has at least one perforation line (10), in particular in the form of a tear-open perforation line, which can be specified at predetermined intervals by means of the Cutting (16) in the corrugated cardboard material (12) produced continuous separation points (42) between which the corrugated cardboard material (12) is scored by means of the further cutting edges (22) to form a scoring line (46).
EP95109521A 1994-08-09 1995-06-20 Method and device as well as punchknife for making tearing perforations on corrugated paperboard products Withdrawn EP0698454A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4428185 1994-08-09
DE19944428185 DE4428185A1 (en) 1994-08-09 1994-08-09 Device for making tear perforations

Publications (1)

Publication Number Publication Date
EP0698454A1 true EP0698454A1 (en) 1996-02-28

Family

ID=6525265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95109521A Withdrawn EP0698454A1 (en) 1994-08-09 1995-06-20 Method and device as well as punchknife for making tearing perforations on corrugated paperboard products

Country Status (2)

Country Link
EP (1) EP0698454A1 (en)
DE (1) DE4428185A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1013518C2 (en) * 1999-11-08 2001-05-09 Multifoil Bv Information carrier, especially adhesive carriers for sides of vehicles, has at least one line of weakness in the side of the film designed to be adhered to an underlay
DE10059125A1 (en) * 2000-11-29 2002-06-06 Heidelberger Druckmasch Ag Perforating tool has one half with perforating teeth separated by gap from second half which has cutting zone with sections of cutting edge alternating with groups of perforating teeth which have slanting tip

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6223641B1 (en) 1996-11-12 2001-05-01 Xynatech, Inc., Perforating and slitting die sheet
DE10227050B3 (en) * 2002-06-17 2004-01-29 Albert Frey Verpackungsentwicklungen Und Vertriebs-Gmbh Corrugated cardboard with tear line
DE102008004902A1 (en) * 2008-01-17 2009-07-23 Cab Produkttechnik Gmbh & Co. Kg Apparatus and method for perforating strip material
EP2390196B1 (en) 2010-05-29 2014-03-26 STI-Gustav Stabernack GmbH Opening device for a blank
DE102018000328B4 (en) * 2018-01-17 2019-08-08 Kiefer Werkzeugbau Gmbh Device for punching parts out of a material web or from a meterial arc
DE102019111435A1 (en) * 2019-05-03 2020-11-05 Heuchemer Verpackung Gmbh & Co. Kg Tear-open device in a blank made of folded material, in particular in a blank made of corrugated cardboard and a flat punching device for producing a cardboard blank

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE671344C (en) 1937-10-21 1939-02-06 Jagenberg Werke Ag Cut of cardboard or the like for boxes or the like, as well as a method and device for its production
GB551569A (en) * 1941-12-12 1943-03-01 Fanfold Ltd Improvements relating to cutting devices
US2401310A (en) * 1945-04-09 1946-06-04 Clarence P Mayhew Perforating rule
DE1172525B (en) * 1963-02-27 1964-06-18 Heinrich Sieger G M B H Working method and device for the production of perforated webs, sheets and blanks from corrugated cardboard for use in folding cushions, tear-off boxes and the like. like
US3205750A (en) * 1962-09-17 1965-09-14 John Strange Carton Company Means for perforating paperboard
US3255648A (en) * 1964-11-16 1966-06-14 Kvp Sutherland Paper Co Severance line construction for cartons and the like
DE2365590A1 (en) * 1973-12-14 1975-09-11 Bandamatic Systems Service K K Stamping tool used in packaging container production - fitted with heated stamp edges for different stamping and cutting processes
DE4138025A1 (en) * 1991-11-19 1993-05-27 Baeumer Kg Spezialmasch Bandsaw blade for foams and textiles - has wavy sections with teeth to prevent plucking with reciprocating blades
EP0546392A1 (en) * 1991-11-29 1993-06-16 R + S STANZTECHNIK GmbH Cutting blade and apparatus therewith

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1316670A (en) * 1970-07-29 1973-05-09 Ross A L Perforator means
DE3119175A1 (en) * 1981-05-14 1982-12-09 Gartemann & Hollmann Gmbh, 4800 Bielefeld Multi-layer sack, and method and device for its manufacture

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE671344C (en) 1937-10-21 1939-02-06 Jagenberg Werke Ag Cut of cardboard or the like for boxes or the like, as well as a method and device for its production
GB551569A (en) * 1941-12-12 1943-03-01 Fanfold Ltd Improvements relating to cutting devices
US2401310A (en) * 1945-04-09 1946-06-04 Clarence P Mayhew Perforating rule
US3205750A (en) * 1962-09-17 1965-09-14 John Strange Carton Company Means for perforating paperboard
DE1172525B (en) * 1963-02-27 1964-06-18 Heinrich Sieger G M B H Working method and device for the production of perforated webs, sheets and blanks from corrugated cardboard for use in folding cushions, tear-off boxes and the like. like
US3255648A (en) * 1964-11-16 1966-06-14 Kvp Sutherland Paper Co Severance line construction for cartons and the like
DE2365590A1 (en) * 1973-12-14 1975-09-11 Bandamatic Systems Service K K Stamping tool used in packaging container production - fitted with heated stamp edges for different stamping and cutting processes
DE4138025A1 (en) * 1991-11-19 1993-05-27 Baeumer Kg Spezialmasch Bandsaw blade for foams and textiles - has wavy sections with teeth to prevent plucking with reciprocating blades
EP0546392A1 (en) * 1991-11-29 1993-06-16 R + S STANZTECHNIK GmbH Cutting blade and apparatus therewith

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1013518C2 (en) * 1999-11-08 2001-05-09 Multifoil Bv Information carrier, especially adhesive carriers for sides of vehicles, has at least one line of weakness in the side of the film designed to be adhered to an underlay
DE10059125A1 (en) * 2000-11-29 2002-06-06 Heidelberger Druckmasch Ag Perforating tool has one half with perforating teeth separated by gap from second half which has cutting zone with sections of cutting edge alternating with groups of perforating teeth which have slanting tip

Also Published As

Publication number Publication date
DE4428185A1 (en) 1996-02-15

Similar Documents

Publication Publication Date Title
DE69402489T2 (en) Method and device for producing bowl-shaped packages; and pack
DE3345911A1 (en) RITZ SCREWING DEVICE
DE10227050B3 (en) Corrugated cardboard with tear line
DE69006010T2 (en) METHOD AND DEVICE FOR PUNCHING PACKAGING MATERIAL.
DE2922164A1 (en) CROSS CUTTER FOR CUTTING BOWS FROM PAPER, CARDBOARD, OR THE LIKE.
DE1249065B (en) Process for creasing corrugated cardboard consisting of at least three layers of material as well as a blank produced according to this process
EP1361988A1 (en) Cigarette packet and cut sheet
EP2275251A1 (en) Film blade with suction chamber
EP0698454A1 (en) Method and device as well as punchknife for making tearing perforations on corrugated paperboard products
EP2390196B1 (en) Opening device for a blank
EP3144133A1 (en) Adevice for making a groove in sheets of material
EP0443506B1 (en) Edge protector
DE671344C (en) Cut of cardboard or the like for boxes or the like, as well as a method and device for its production
DE1214521B (en) Method for introducing a bending line running transversely to the corrugations of a three-layer corrugated cardboard, as well as a device for carrying out this method and three-layer corrugated cardboard with a bending line produced according to this method
DE102019111435A1 (en) Tear-open device in a blank made of folded material, in particular in a blank made of corrugated cardboard and a flat punching device for producing a cardboard blank
EP2311611A2 (en) Procedure and tool for producing cuts from sheet material
DE4316368C2 (en) Process for the production of coated panel elements
EP0255626B1 (en) Pair of shaft-blades for cutting web material, particulary corrugated board
DE102020115413A1 (en) Process for the production of packaging cushions and the associated production line
DE2752717A1 (en) Stamping tool for cutting cardboard carton sheets - has right angled joint between cutting edges to avoid overhang of brittle edge
EP2774752A1 (en) Method and device for producing folding box blanks from a sheet of material
DE102006035560A1 (en) Corrugated cardboard plant and process for the production of corrugated sheets
DE10025600B4 (en) Method for selective removal of sharp edges on tools for punching flat material
DE4010871C2 (en)
WO2017207554A1 (en) Combined stamping- and scribing/cutting tool, and use thereof

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19960829