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EP4180192B1 - Dispositif de poinçonnage à format variable et procédé correspondant - Google Patents

Dispositif de poinçonnage à format variable et procédé correspondant Download PDF

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Publication number
EP4180192B1
EP4180192B1 EP22198079.0A EP22198079A EP4180192B1 EP 4180192 B1 EP4180192 B1 EP 4180192B1 EP 22198079 A EP22198079 A EP 22198079A EP 4180192 B1 EP4180192 B1 EP 4180192B1
Authority
EP
European Patent Office
Prior art keywords
punching
length
sheet
sheets
cylinder
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.)
Active
Application number
EP22198079.0A
Other languages
German (de)
English (en)
Other versions
EP4180192A1 (fr
Inventor
Wolfgang Hiesinger
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.)
Manroland Goss Web Systems GmbH
Original Assignee
Manroland Goss Web Systems GmbH
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Publication date
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Publication of EP4180192A1 publication Critical patent/EP4180192A1/fr
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Publication of EP4180192B1 publication Critical patent/EP4180192B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/384—Cutting-out; Stamping-out using rotating drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/08—Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
    • B26D3/085—On sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D9/00—Cutting apparatus combined with punching or perforating apparatus or with dissimilar cutting apparatus

Definitions

  • the invention relates to a device for the format-variable punching of a plurality of sheets to be punched, each sheet having a length Lb, comprising a feed device for sheets to be punched, a punching unit with a punching length Ls comprising a punching tool with an effective punching tool length Lw, the device comprising an acceleration device for generating a gap with a length LL between the fed sheets.
  • the invention relates to a method for the format-variable punching or embossing of sheets with a sheet length Lb, wherein the sheet is processed with a punching device with an effective punching length Ls, wherein each sheet fed to the punching device is accelerated by means of an acceleration device to create a gap with a gap length LL.
  • Punching machines or punching devices are known from the prior art in which shapes such as folding boxes are punched out of printed webs or sheets and the future bending edges, tear perforations or similar are embossed.
  • punching in which the substrate of the sheet or web is severed
  • embossing in which the substrate of the sheet or web is not severed but deformed
  • the US 2020/0298436 A1 discloses a punching device in which a web to be punched is cross-cut and separated into individual sheets and wherein the separated sheets are fed to a punching device at a distance from each other in the transport direction.
  • a flatbed punch has a maximum working width and a maximum punching length Ls, which essentially corresponds to the maximum length of the punching table in the feed direction.
  • the punching length Ls thus limits the maximum sheet length that can be punched.
  • Rotary die-cutting units have a rotating die-cutting cylinder which is in operative connection with the sheet or web to be die-cut, and further comprises an impression cylinder on which the sheet or web to be die-cut and, in some cases, also the die-cutting tool are supported.
  • the cylinder circumference of the punching cylinder therefore determines the punching length Ls.
  • the punching tool is formed on the outer surface of the punching cylinder. This can be done either by using a hardened cylinder with a punching length precisely tailored to the product to be punched, or by incorporating a corresponding pattern into its surface.
  • Flatbed die cutters essentially have the same requirements, albeit with flat die cutters.
  • a punching length Ls such as a punching cylinder with a defined effective diameter and consequently with a defined punching length Ls.
  • the device according to the invention is characterized in that the punching length Ls is greater than the sheet length Lb.
  • the method according to the invention is characterized in that the effective punching length Ls is greater than the arc length Lb.
  • Such a device and such a method have the advantage that with a punching bed or with a punching cylinder of a certain punching length Ls for different lengths of punching patterns and thus for a plurality of Product lengths can be used, and the sheet length Lb can be stepped down to the cutting length Ls without changing the cutting cylinder, which minimizes the cost of purchasing, stocking, and maintaining the corresponding cutting cylinders or cutting beds. Furthermore, changing the product length does not necessarily require replacing the cutting cylinder or cutting bed, which significantly reduces setup times.
  • the acceleration device for generating a gap between each of the fed sheets is designed in such a way that a gap with a gap length LL equal to the punching length Ls less the sheet length Lb is obtained.
  • This design has the advantage that the punching cylinder can rotate at a continuous speed and/or other devices for decelerating or accelerating the punching unit or the sheets to be punched can be avoided.
  • Fig. 1 shows a basic structure of a punching machine 10 as is known from the prior art.
  • the punching unit 10 comprises a punching cylinder 11 with an effective punching cylinder diameter ds.
  • This punching cylinder 11 carries a punching tool 16 on at least part of its outer surface, which is either machined as a pattern into the outer surface of the hardened punching cylinder 11, or the punching tool 16 is a punching die made from a ferromagnetic sheet, to which the pattern is applied. In the latter case, the punching cylinder 11 is a magnetic cylinder.
  • the punching tool 16 mounted on the punching cylinder 11 is in operative connection with the web-shaped or sheet-shaped substrate passing through the punching cylinder 11 and the impression cylinder 13 during punching.
  • an additional drive or support roller 14 is used.
  • Drive means for the rotational drive of the individual cylinders are provided in Fig. 1 not shown due to lack of relevance.
  • Fig. 1 is a schematic side view of the exemplary punching unit 10 shown in Fig. 1, the punching cylinder 11 has an effective punching cylinder diameter ds. This can be smaller, larger, or equal to the diameter of the impression cylinder 13.
  • the punching length Ls it is also possible for the punching length Ls to be an integer multiple of the Sheet length Lb or an integer multiple of the printing length of a web printing unit, but a change in the sheet length Lb, i.e. the length of the pattern to be punched, always requires an adjustment of the punching cylinder diameter ds.
  • the printing of the web 2 is only one possibility for producing printed sheets 3 by cross-cutting the web 2 and the resulting separation of the web 2 into sheets 3. It is pointed out that already separated sheets 3 can be printed and fed to the device 1 according to the invention.
  • the device 1 according to the invention can also be operated offline and thus parallel or independently of the printing operation.
  • the invention is Fig. 1
  • the rotary punching unit shown can be used with a flatbed punch, as this is also determined by a defined punching length Ls.
  • the substrate web 2 which runs from left to right in the direction of travel LR through the device 1 (hereinafter referred to as web 2), first passes through a printing device 20.
  • a print image with a length Lb1 which normally corresponds to the sheet length Lb1 to avoid unprinted waste, is printed by the printing cylinder 21, which is supported on an impression cylinder 22. It goes without saying that a plurality of identical or different copies can be printed one after the other on a sheet length Lb1, viewed in the direction of travel LR.
  • the print images with the length Lb1 are printed one after the other on the web 2.
  • the printing cylinder diameter dd can normally be changed by replacing the printing cylinder 21 or by replacing a sleeve (not shown), although not during production.
  • a plurality of printing devices 20 of the same or different printing processes can be arranged one behind the other in the direction of travel LR.
  • the type of printing device 20 and the printing method are irrelevant for the present invention.
  • the printing device 20 can be configured, for example, as an offset printing unit and/or a gravure printing unit and/or a flexographic printing unit and/or a digital printing unit, such as an inkjet printing unit.
  • the printed web 2 passes directly or indirectly after the printing unit through a cutting device 30, with which the web 2 is divided into individual sheets 3 with the sheet length Lb1. It goes without saying that the section length corresponds to the sheet length Lb1 in order to prevent the cut from passing through the printed image over time.
  • the Fig. 3 The cutting device 30 illustrated by way of example comprises a pair of cutting cylinders 31 through which the web 2 passes and is cut transversely into sheets 3.
  • the functioning of the cutting device 30 is not relevant to the present invention. It is also possible for the present invention to feed a pre-printed web 2 into a cutting device 30 arranged upstream of the punching unit 10 and to perform the cutting of the web 2 independently of the printing process.
  • the cutting device 30 used here is preferably designed to produce different and/or variable sheet lengths Lb.
  • a different sheet length Lb means that the cutting device 30 can be converted and/or adjusted after a production run to separate the web 2 into a different sheet length Lb, for example, by relocating knives on the circumference.
  • Producing a variable sheet length Lb means that the cutting device 30 can also change the sheet length Lb during production. could, for example, be caused by a non-continuous peripheral speed of the cutting knife cylinders.
  • Such a configuration is particularly important when the web 2 is printed using a completely format-variable printing device 20, such as a digital printing device.
  • the printing device 20 shown as an example with a sheet length Lb1 that is constant during production separates the Fig. 3
  • the cutting device 30 shown cuts the web 2 into sheets 3 with a sheet length Lb1 during production.
  • the punching cylinder 11 thus carries a punching tool 16 with an extended length Lw1 on its circumference, wherein the punching tool length Lw1 essentially corresponds to the arc length Lb1.
  • the subsequently fed sheets 3 pass through an acceleration device 40, which comprises, for example, one or more pull rollers 41 or pull roller pairs 41.
  • This acceleration device 40 comprises, for example, an acceleration roller 42 or an acceleration cam or a belt acceleration (not shown) for accelerating each sheet 3.
  • the acceleration device 40 accelerates the exemplary Fig. 3 essentially without a gap, in order to create a gap 4 with a gap length LL1 between the subsequent sheets 3.
  • the acceleration device 40 can accelerate the sheets 3 in only one step to achieve the gap length LL, but it is also possible to achieve this in several individual, successive acceleration stages. From the point of view of the function of the acceleration device 40, this can therefore also comprise several acceleration devices arranged one behind the other.
  • the sheets 3 accelerated in this way are now fed to the punching unit 10 in precise register, so that the leading edge of each sheet 3 essentially meets the leading edge of the punching tool 16, if desired. If the length of the pattern to be punched or embossed is shorter than the sheet length Lb, the leading edge of the punching tool 16 can also meet at any other desired location within each sheet 3. However, due to the gap 4 between the sheets 3 created by the acceleration device 40, register-accurate punching or embossing is also possible without adjusting the punching length Ls and thus without adjusting the punching cylinder diameter ds.
  • the method for generating a gap 4 between the fed sheets 3 with a defined gap length LL is also possible for flatbed punches with a defined punching length Ls.
  • Fig. 1 shows an embodiment in which the device 1 comprises a printing device 20 and a cutting device 30, the device 1 is also possible in the form that it only comprises at least one acceleration device 40, to which the sheets 3 are fed accordingly, and a punching unit 10.
  • Fig. 4 shows the Fig. 3 known exemplary device 1, although the printing cylinder 21 has a printing cylinder diameter dd2 which is larger than the printing cylinder diameter dd1 of Fig. 3 is.
  • the punching tool length Lw2 of the punching tool 16 essentially corresponds to the arc length Lb2.
  • a punching unit 10 with a constant punching length Ls, such as a constant punching cylinder diameter ds in the case of a rotary punching unit 10, despite a changing sheet length Lb.
  • the peripheral speed of the punching cylinder 11 In addition to creating a gap 4 between the incoming sheets 3, it is possible to vary the peripheral speed of the punching cylinder 11 during one revolution, so that in the area in which the punching tool 16 is engaged, the peripheral speed of the punching cylinder 11 corresponds to the speed of the sheets 3 to be punched, and that in the area in which the punching tool 16 is not engaged, the peripheral speed of the punching cylinder 11 is increased, so that a reduction of the gap length LL and consequently a reduction of the acceleration of the sheets 3 in the acceleration device 40 is possible.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (15)

  1. Dispositif pour le poinçonnage à format variable d'une pluralité de feuilles (3) à poinçonner, chaque feuille (3) présentant une longueur Lb, comprenant un dispositif d'alimentation de feuilles à découper, un dispositif de poinçonnage (10) avec une longueur de poinçonnage Ls comprenant un outil de poinçonnage (16) avec une longueur d'outil de poinçonnage effective Lw, la longueur de poinçonnage Ls étant la circonférence d'un cylindre de poinçonnage (11) ou la longueur maximale d'une table de poinçonnage dans la direction de passage, le dispositif comprenant un dispositif d'accélération (40) pour créer un espace (4) ayant une longueur d'espace LL entre les feuilles (3) fournies, caractérisé en ce que la longueur de poinçonnage Ls est supérieure à la longueur de feuille Lb.
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'accélération (40) est configuré pour créer un espace (4) entre chacune des feuilles (3) alimentées de telle sorte qu'il en résulte un espace (4) ayant une longueur d'espace LL = Ls - Lb.
  3. Dispositif selon l'une quelconque des revendications 1 à 2, caractérisé en ce que le dispositif (1) comprend un dispositif de coupe (30) pour séparer une bande fournie (2) en feuilles (3) ayant une longueur de feuille Lb.
  4. Dispositif selon la revendication 3, caractérisé en ce que le dispositif de coupe (30) est configuré pour générer des longueurs de feuilles Lb différentes et/ou variables.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif (1) comprend un dispositif d'impression (20).
  6. Dispositif selon la revendication 5, caractérisé en ce que le dispositif d'impression (20) comprend un groupe d'impression offset et/ou un groupe d'impression hélio et/ou un groupe d'impression flexographique et/ou un groupe d'impression numérique tel qu'un groupe d'impression à jet d'encre.
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que le dispositif de poinçonnage (10) est réalisé sous la forme d'un groupe de découpe rotatif comprenant un cylindre de poinçonnage (11) ayant un diamètre effectif ds et une longueur effective de poinçonnage Ls = ds x π.
  8. Dispositif selon la revendication 7, caractérisé en ce que l'outil de poinçonnage (16) recouvre au moins partiellement la périphérie du cylindre de poinçonnage (11) avec sa longueur d'outil de poinçonnage effective Lw.
  9. Dispositif selon l'une des revendications 7 ou 8, caractérisé en ce que l'outil de poinçonnage (16) est réalisé sous la forme d'une tôle de poinçonnage et le cylindre de poinçonnage (11) sous la forme d'un cylindre magnétique.
  10. Dispositif selon l'une des revendications 7 ou 8, caractérisé en ce que l'outil de poinçonnage (16) est réalisé sous la forme d'un motif gravé sur une zone d'une surface latérale du cylindre de poinçonnage (11).
  11. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que le mécanisme de poinçonnage (10) est réalisé sous la forme d'un poinçon à plat avec une longueur de poinçonnage efficace Ls.
  12. Procédé de poinçonnage ou de gaufrage à format variable de feuilles (3) d'une longueur de feuille Lb, la feuille (3) étant traitée avec un dispositif de poinçonnage (10) d'une longueur de poinçonnage efficace Ls, la longueur de poinçonnage Ls étant la circonférence d'un cylindre de poinçonnage (11) ou la longueur maximale d'une table de poinçonnage dans le sens de passage, dans lequel chaque feuille (3) amenée au dispositif de poinçonnage (10) est accélérée au moyen d'un dispositif d'accélération (40) pour produire un espace (4) ayant une longueur d'espace LL, caractérisé en ce que la longueur de poinçonnage efficace Ls est supérieure à la longueur de feuille Lb.
  13. Procédé selon la revendication 12, caractérisé en ce que chaque feuille (3) est accélérée de manière à créer un espace (4) entre deux feuilles (3) suivantes, avec une longueur d'espace LL = Ls - Lb.
  14. Procédé selon l'une des revendications 12 ou 13, caractérisé en ce que les feuilles (3) amenées sont produites en divisant une bande (2) au moyen d'un dispositif de coupe (30).
  15. Procédé selon l'une quelconque des revendications 12 à 14, caractérisé en ce que la bande (2) est imprimée au moyen d'un dispositif d'impression (20) avant d'être divisée en feuilles (3).
EP22198079.0A 2021-11-15 2022-09-27 Dispositif de poinçonnage à format variable et procédé correspondant Active EP4180192B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021129700.1A DE102021129700A1 (de) 2021-11-15 2021-11-15 Formatvariable Stanzvorrichtung und Verfahren hierzu

Publications (2)

Publication Number Publication Date
EP4180192A1 EP4180192A1 (fr) 2023-05-17
EP4180192B1 true EP4180192B1 (fr) 2025-04-23

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EP22198079.0A Active EP4180192B1 (fr) 2021-11-15 2022-09-27 Dispositif de poinçonnage à format variable et procédé correspondant

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EP (1) EP4180192B1 (fr)
DE (1) DE102021129700A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012100708U1 (de) * 2012-03-01 2012-04-25 Wsd Gmbh Stanzvorrichtung mit kontinuierlich laufender Stanzwalze
WO2014191095A1 (fr) * 2013-05-29 2014-12-04 Bobst Mex Sa Unite de transformation d'un support en bande continue et machine de production d'emballages ainsi equipee
DE102016209337A1 (de) * 2015-11-23 2017-05-24 Koenig & Bauer Ag Verfahren zum Behandeln von Substraten
DE102017207706B4 (de) 2017-05-08 2019-03-28 Koenig & Bauer Ag Vorrichtung zur Überwachung des Bogenlaufs entlang einer Transportbahn
DE102019134723B4 (de) 2019-12-17 2023-01-12 Koenig & Bauer Ag Bogenverarbeitende Maschine mit einem Transportsystem
DE102019134707B4 (de) 2019-12-17 2022-12-29 Koenig & Bauer Ag Bogenverarbeitende Maschine mit einem Transportsystem
DE102020113508A1 (de) 2020-05-19 2021-11-25 Koenig & Bauer Ag Vorrichtung und Verfahren zum Zuführen von flächenförmigen Gütern zu einer Bearbeitungseinheit

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DE102021129700A1 (de) 2023-05-17
EP4180192A1 (fr) 2023-05-17

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