EP4180229B1 - 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
EP4180229B1
EP4180229B1 EP22201710.5A EP22201710A EP4180229B1 EP 4180229 B1 EP4180229 B1 EP 4180229B1 EP 22201710 A EP22201710 A EP 22201710A EP 4180229 B1 EP4180229 B1 EP 4180229B1
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EP
European Patent Office
Prior art keywords
die
cutting
web
length
printing
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
EP22201710.5A
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German (de)
English (en)
Other versions
EP4180229A1 (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
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.)
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Publication date
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Publication of EP4180229A1 publication Critical patent/EP4180229A1/fr
Application granted granted Critical
Publication of EP4180229B1 publication Critical patent/EP4180229B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/02—Apparatus or machines for carrying out printing operations combined with other operations with embossing
    • B41F19/06—Printing and embossing between a negative and a positive forme after inking and wiping the negative forme; Printing from an ink band treated with colour or "gold"
    • B41F19/062—Presses of the rotary type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/34—Cylinder lifting or adjusting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/54—Auxiliary folding, cutting, collecting or depositing of sheets or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/008—Apparatus or machines for carrying out printing operations combined with other operations with means for stamping or cutting out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
    • B41J3/546—Combination of different types, e.g. using a thermal transfer head and an inkjet print head

Definitions

  • the invention relates to a device for printing and punching a web, wherein the device comprises at least one printing device, wherein in the printing device the web is printed with a recurring print image with a printing length Lb, and wherein the web in the area of the at least one printing device is essentially one has a uniform printing web speed v20, and wherein the device comprises a punching mechanism, wherein the punching mechanism has a punching length Ls, and wherein a pattern with a pattern length Lm can be punched out or impressed by means of the punching mechanism, the pattern length Lm being less than or equal to the printing length Lb .
  • the invention further relates to a method for printing and punching a web, wherein the web is printed using at least one printing device with a recurring print image with a print length Lb, and wherein the web has a substantially uniform printing web speed v20 in the area of the at least one printing device and passes through the printing device in a web running direction LR, and wherein the web is punched out or embossed with a pattern with a pattern length Lm by means of a punching machine with a punching length Ls, the pattern length Lm being less than or equal to the printing length Lb.
  • Punching units or punching devices are known from the prior art, in which shapes such as folding boxes are punched out, in particular from printed webs or sheets, and the future bending edges, tear-open perforations or the like are embossed.
  • the US 6,230,616 B1 discloses an embossing device for embossing a moving flexible material web, wherein the web to be embossed is moved at a feed web speed, and wherein the web is connected downstream by means of it Removal area is moved to a periodically different removal path speed.
  • the DE 10 2016 226 167 A1 discloses a device for punching or embossing a sheet-shaped substrate, the processing cylinders having means for fixing a replaceable elevator.
  • a flatbed punch has a maximum working width and also has a maximum punching length Ls, which essentially corresponds to the maximum length of the punching table in the direction of travel.
  • the punching length Ls therefore limits the maximum pattern length Lm to be punched.
  • Rotary punching machines have a rotating punching cylinder, which is in operative connection with the sheet to be punched or the web to be punched, and also includes an impression cylinder on which the sheet to be punched or the web to be punched and partly also the punching tool are supported.
  • the cylinder circumference of the punching cylinder therefore determines the punching length Ls.
  • the punching tool is formed on the lateral surface of the punching cylinder. This can either be done in the form of a hardened cylinder with a punching length Ls that is precisely tailored to the product to be punched and a corresponding pattern is worked into its surface.
  • Flatbed punches essentially have the same requirements, albeit with flat punching tools.
  • 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 of the punching machine is greater than the pattern length Lm, and the device comprises at least one deflection device for cyclically changing the web speed v.
  • the method according to the invention is characterized in that the punching length Ls of the punching unit is larger than the pattern length Lm and the web is guided by a deflection device for cyclically changing the web speed v to compensate for the difference in length between the pattern length Lm and the punching length Ls.
  • Such a device and such a method have the advantage that with a punching bed or with a punching cylinder a certain punching length Ls can be used for different lengths of products to be punched out or for different pattern lengths Lm and thus for a plurality of product lengths, which reduces the effort involved in purchasing , stocking and maintenance of corresponding punching cylinders or punching beds minimized.
  • the punching cylinder or the punching bed does not necessarily have to be replaced, which significantly reduces set-up times.
  • the at least one deflection device comprises at least one deflection roller, wherein the deflection roller carries out a lifting movement corresponding to the punching cycle.
  • This configuration has the advantage that the path downstream of the deflection device has a cyclical speed profile, so that in the case of a Rotary punch, the web can be punched during the higher web speed and that in the case of a flatbed punch, the web can be punched at a web speed of zero, and at the same time the web can still be punched in register.
  • the deflection device is designed in such a way that the punching web speed v10, viewed in the web running direction LR, can be braked to a maximum of zero value downstream of the deflection device.
  • Fig. 1 shows a basic structure of a punching machine 10, as is known from the prior art.
  • the punching machine 10 includes a punching cylinder 11 with an effective punching cylinder diameter ds.
  • This punching cylinder 11 carries, at least on part of its lateral surface, a punching tool 16, which is either incorporated as a pattern into the lateral surface of the hardened punching cylinder 11, or the punching tool 16 is a punching die applied to a ferromagnetic sheet metal, on which the pattern is attached.
  • the punching cylinder 11 is a magnetic cylinder.
  • the punching tool 16 applied to the punching cylinder 11 is in operative connection with the web-shaped or sheet-shaped substrate running through the punching cylinder 11 and the impression cylinder 13.
  • an additional drive or support roller is used.
  • Drive means for rotating the individual cylinders are in Fig. 1 not shown due to lack of relevance.
  • 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 represents the sheet length Lb or an integer multiple of the printing length of a roll 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.
  • Fig. 3 shows a device 1 through which a web 2 to be printed and punched runs in the running direction LR.
  • the web 2 is printed in the printing device 20.
  • the web 2 to be printed is in contact with a printing cylinder 21.
  • the printing device 20 is a so-called format-variable printing device 20, since it can print different printing lengths Lb by exchanging the printing cylinders 21 or exchanging sleeves of the printing cylinders 21.
  • the printing device 20 can be designed as an offset printing unit and/or gravure printing unit and/or flexographic printing unit and/or as a digital printing unit such as an inkjet printing unit.
  • a printing device 20 with a printing cylinder 21 is shown, wherein the printing cylinder 21 can be designed as a first printing cylinder 21-1 with a first printing cylinder diameter dd1 or as a second printing cylinder 21-2 with a second printing cylinder diameter dd2.
  • a first printed image with the first printing length Lb1 is thus printed with the first printing cylinder 21-1, whereas after a production change including an exchange of the at least one printing cylinder 21 with the second printing cylinder 21-2, a second printed image with a second printing length Lb2 can be printed.
  • the second print length Lb2 is greater than the first print length Lb1.
  • the printed web 2 is fed to the punching machine 10 for punching the punching pattern with the length Lm1 equal to Lb1.
  • a first punching tool 16-1 with a punching tool length Lw1 is attached to the punching cylinder 11 of the punching work 10, the punching tool length Lw1 being equal to the first pattern length Lm1.
  • the punching cylinder diameter ds is larger than the first printing cylinder diameter dd1, which is why the punching length Ls is larger than the first pattern length Lm1.
  • a deflection device 30 is arranged upstream of the punching mill 10 in the running direction LR, which, for example, comprises two guide rollers 31 and a deflection roller 32, the deflection roller 32 executing a lifting movement 33.
  • the drive means for carrying out a corresponding lifting movement 33 are in Fig. 3 not shown.
  • Deflection roller 32 shown with a dotted line represents the lower position of this roller. If the web 2 runs into the deflection device 30 with a substantially uniform printing web speed v20, the speed of the web 2 is not changed when the deflection roller 32 is in an unchangeable position and passes through the deflection device 30 with unchanged path speed v.
  • the deflection roller 32 moves from the lower position shown in dotted lines to the upper position shown as an example, at the appropriate speed of the lifting movement 33, the supplied web 2 is moved into the two ascending substrate sections between the first guide roller 31 seen in the running direction LR and the deflection roller 32 and between the deflection roller 32 and the second guide roller 31 as seen in the running direction LR, so that as seen in the running direction LR after the deflection device 30 the web speed v is either reduced, braked to zero or even reversed in direction, which corresponds to a negative value of a web speed v corresponds.
  • the punching of the web 2 can be carried out by the punching tool 16-1 if the punching path speed v10 is present. For this purpose, there must be no relative speed between the peripheral speed of the punching cylinder 11 and the web 2.
  • the deflection roller 32 moves upwards, so that the web speed v downstream of the deflection device 30 is reduced, brought to the value zero or even reversed.
  • the punching cylinder 11 either continues to rotate at a constant punching path speed v10 as the peripheral speed or the peripheral speed is even increased during this period of time.
  • the section of the punching cylinder circumference not occupied by a punching tool 16-1 of the punching tool length Lw1 to have a relative speed to the substrate web, so that with appropriate coordination of the speed of the stroke movement 33 of the deflection roller 32, the stroke of the deflection roller 32 and the corresponding timing the leading edge of the punching tool 16 can be brought back into alignment with the leading edge of the printed image, so that the pattern to be punched can again be brought into register on the printed image.
  • Fig. 3 shows the example of a second printing cylinder diameter dd2, which is larger than the first printing cylinder diameter dd1. Consequently, the second print length Lb2 is larger than the first print length Lb1.
  • Fig. 4 shows in a diagram the course of the path speed v over the period of several punching processes for the second production with the second pattern length Lm2 when using a rotary punch.
  • the dashed line represents the printing web speed v20 and thus the web speed v in the area seen in the running direction LR in front of the deflection device 30. It can be seen here that this speed is essentially uniform, since this is generally advantageous for the printing process .
  • the term "substantially” is to be construed to mean that due to non-uniformities in the substrate web, fluctuations in web tension or control inaccuracies may be extremely minor. However, these are usually negligible, which is why the print web speed v20 can be assumed to be constant.
  • the solid line represents the punching web speed v10, that is, the web speed v in the running direction LR of the web 2 seen downstream of the deflection device 30.
  • This punching path speed v10 is in the in Fig. 4 In the example shown, it is slightly higher than the printing web speed v20, since during the release of the web 2 by the deflection roller 32 executing a lifting movement 33, additional web 2 is released during the downward movement.
  • the deflection roller 32 moves into the upper position. During this part of the lifting movement 33, namely the upward movement at the in Fig. 3
  • the path speed v downstream of the deflection device 30 is reduced to the value zero, for example.
  • the punching cylinder 11 continues to rotate at an unchanged or even increased web speed, so that the leading edge of the punching tool 16-2 can be brought into alignment with the leading edge of the printed image and thus to the target position for the punching pattern.
  • the deflection roller 32 moves downward again and releases the web 2 stored in the deflection device 30 again, so that again sets the punching path speed v10 downstream of the deflection device 30.

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

Claims (15)

  1. Dispositif d'impression et de découpage d'une bande (2),
    ce dispositif comprenant au moins un dispositif d'impression (20), la bande (2) étant imprimée dans le dispositif d'impression (20) avec une image d'impression récurrente d'une longueur d'impression Lb, et la bande (2) présentant, au niveau de l'au moins un dispositif d'impression (20), une vitesse de bande d'impression sensiblement régulière v20,
    le dispositif comprenant une unité de découpage (10), l'unité de découpage (10) présentant une longueur de découpage Ls, et, au moyen de l'unité de découpage (10), un motif d'une longueur de motif Lm pouvant être découpé ou gaufré, la longueur de motif Lm étant inférieure ou égale à la longueur d'impression Lb,
    caractérisé en ce que la longueur de découpage Ls de l'unité de découpage (10) est supérieure à la longueur de motif Lm, et que le dispositif (1) présente au moins un dispositif de déviation (30) pour la modification cyclique de la vitesse de la bande v.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'au moins un dispositif de déviation (30) comprend au moins un cylindre de déviation (32), et que le cylindre de déviation (32) exécute un mouvement de levage (33) correspondant au cycle de découpage.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le dispositif de déviation (30) se présente sous une forme telle que la vitesse de la bande v, vue dans le sens de circulation de la bande v, peut être freinée vers le bas du dispositif de déviation (30) au maximum à la valeur zéro.
  4. Dispositif selon une des revendications 1 à 3, caractérisé en ce que l'unité de découpage (10) est réalisée sous forme d'une découpeuse à plat d'une longueur de découpage maximale Ls.
  5. Dispositif selon une des revendications 1 à 3, caractérisé en ce que l'unité de découpage (10) est réalisée sous forme d'une unité de découpage rotative comprenant un cylindre de découpage (11) ayant un diamètre actif ds et une longueur de découpage active Ls = ds x Π.
  6. Dispositif selon la revendication 5, caractérisé en ce que le cylindre de découpage (11) comprend un outil de découpage à 11 (16) ayant une longueur d'outil de découpage Lw, et l'outil de découpage (16) recouvre du moins partiellement la circonférence du cylindre de découpage (11).
  7. Dispositif selon une des revendications 5 à 6, caractérisé en ce que l'outil de découpage (16) est réalisé sous forme d'une plaque de découpage et le cylindre de découpage (11) sous forme d'un cylindre magnétique.
  8. Dispositif selon une des revendications 5 à 6, caractérisé en ce que l'outil de découpage (16) est réalisé sous forme d'un motif gravé dans une zone d'une surface de chemise du cylindre de découpage (11) .
  9. Dispositif selon une des revendications 5 à 8, caractérisé en ce que le cylindre de découpage (11) peut être utilisé à une vitesse circonférentielle discontinue, la vitesse circonférentielle du cylindre de découpage (11) étant plus faible en cas d'interaction existante entre la longueur de motif Lm et la bande (2).
  10. Procédé d'impression et de découpage d'une bande (2), la bande (2) étant imprimée au moyen d'au moins un dispositif d'impression (20) avec une image d'impression récurrente avec une longueur d'impression Lb, et la bande (2) présentant, au niveau de l'au moins un dispositif d'impression (20), une vitesse de bande d'impression sensiblement régulière v20 et versant le dispositif d'impression (20) dans un sens de circulation de bande LR,
    et la bande (2) étant découpée ou gaufrée au moyen d'une unité de découpage (10) pour créer un motif d'une longueur de motif Lm, caractérisé en ce que la longueur de découpage ls de l'unité de découpage (10) est supérieure à la longueur de motif Lm, et que la bande (2), pour compenser la différence de longueur de la longueur de motif Lm par rapport à la longueur de découpage Ls, est guidée par un dispositif de déviation (30) pour la modification cyclique de la vitesse de bande v.
  11. Procédé selon la revendication 10, caractérisé en ce que la vitesse de bande d'impression v20 est transformée au moyen d'un cylindre de déviation (32) exécutant un mouvement de levage en une vitesse de bande à découper cyclique v10.
  12. Procédé selon une des revendications 10 ou 11, caractérisé en ce que la vitesse de bande à découper v10 est modifiée de manière à ce que celle-ci, vu dans le sens de circulation de la bande LR, puisse prendre une valeur supérieure ou égale à zéro.
  13. Procédé selon une des revendications 10 à 12, caractérisé en ce que la bande (2) est guidée à travers une unité de découpage réalisée sous forme d'une découpeuse à plat.
  14. Procédé selon une des revendications 10 à 12, caractérisé en ce que la bande (2) est guidée à travers une unité de découpage (10) réalisée sous forme d'une unité de découpage rotative comprenant un cylindre de découpage (11) s'appuyant de manière à pouvoir tourner à une vitesse circonférentielle et ayant un diamètre actif ds et une longueur de découpage active Ls = ds x π.
  15. Procédé selon la revendication 14, caractérisé en ce que le cylindre de découpage (11) est entraîné à une vitesse circonférentielle irrégulière, la vitesse circonférentielle du cylindre de découpage (11) étant réduite pendant l'interaction d'une longueur de motif Lm avec la bande comparativement au reste de la rotation.
EP22201710.5A 2021-11-15 2022-10-14 Dispositif de poinçonnage à format variable et procédé correspondant Active EP4180229B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021129745.1A DE102021129745A1 (de) 2021-11-15 2021-11-15 Formatvariable Stanzvorrichtung und Verfahren hierzu

Publications (2)

Publication Number Publication Date
EP4180229A1 EP4180229A1 (fr) 2023-05-17
EP4180229B1 true EP4180229B1 (fr) 2024-03-27

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EP22201710.5A Active EP4180229B1 (fr) 2021-11-15 2022-10-14 Dispositif de poinçonnage à format variable et procédé correspondant

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DE (1) DE102021129745A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944133C (de) 1950-01-24 1956-06-07 Goebel A G Zugvorrichtung fuer die Papierbahn an Druckmaschinen od. dgl.
DE3534846A1 (de) 1985-09-30 1987-04-16 Joachim Seidl Vorrichtung zum ausgleichen unterschiedlicher zufuehr- und abzugsgeschwindigkeiten von endlosmaterial
DE19749593A1 (de) 1997-11-10 1999-05-20 Moelnlycke Ab Vorrichtung zum Transportieren kontinuierlicher längserstreckter Materialbahnen
DE19842585A1 (de) * 1998-09-17 2000-03-23 Armin Steuer Speichereinrichtung und ihre Verwendung
DE102016226167A1 (de) * 2016-05-30 2017-11-30 Koenig & Bauer Ag Vorrichtung und Verfahren zum Behandeln von Substraten
DE102018219717B3 (de) 2018-11-16 2020-04-02 Koenig & Bauer Ag Bogenverarbeitende Maschine mit einer Vorrichtung zum Behandeln von Substraten

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EP4180229A1 (fr) 2023-05-17

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