EP4180229A1 - 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
EP4180229A1
EP4180229A1 EP22201710.5A EP22201710A EP4180229A1 EP 4180229 A1 EP4180229 A1 EP 4180229A1 EP 22201710 A EP22201710 A EP 22201710A EP 4180229 A1 EP4180229 A1 EP 4180229A1
Authority
EP
European Patent Office
Prior art keywords
punching
length
web
printing
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.)
Granted
Application number
EP22201710.5A
Other languages
German (de)
English (en)
Other versions
EP4180229B1 (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.)
Filing date
Publication date
Application filed by Manroland Goss Web Systems GmbH filed Critical Manroland Goss Web Systems GmbH
Publication of EP4180229A1 publication Critical patent/EP4180229A1/fr
Application granted granted Critical
Publication of EP4180229B1 publication Critical patent/EP4180229B1/fr
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Anticipated expiration legal-status Critical

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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, the device comprising at least one printing device, the web being printed with a recurring print image with a printing length Lb in the printing device, and the web in the region of the at least one printing device having a substantially has a uniform print web speed v20, and wherein the device comprises a stamping unit, the stamping unit having a stamping length Ls, and a pattern with a pattern length Lm being able to be punched out or embossed by means of the stamping unit, the pattern length Lm being less than or equal to the printing length Lb .
  • the invention also relates to a method for printing and punching a web, wherein the web is printed with a recurring print image with a print length Lb by means of at least one printing device, and wherein the web has a substantially uniform printing web speed v20 in the area of the at least one printing device and runs through the printing device in a web travel direction LR, and wherein a pattern with a pattern length Lm is punched out or embossed by means of a punching unit with a punching length Ls, the pattern length Lm being less than or equal to the printing length Lb.
  • Stamping units or stamping devices are known from the prior art, in which forms such as folding boxes, for example, are both stamped out of printed webs or sheets and the future bending edges, tear-open perforations or the like are embossed.
  • a flatbed die cutter has a maximum working width, and it also has a maximum punching length Ls, which essentially corresponds to the maximum length of the punching table in the throughput direction.
  • the punching length Ls thus limits the maximum pattern length to be punched.
  • Rotary punching units 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 is supported.
  • the cylinder circumference of the punching cylinder thus determines the punching length Ls.
  • the punching tool is formed on the lateral surface of the punching cylinder. This can be done either in the form that a hardened cylinder with a punching length Ls that is precisely matched to the product to be punched has a corresponding pattern worked into its surface.
  • Another alternative is the use of so-called magnetic cylinders, ie punching cylinders with incorporated magnets, so that a ferromagnetic sheet metal with incorporated or attached punching tool can be used as the punching tool.
  • stamping sheets as a stamping tool is considerably cheaper than the manufacture of hardened stamping cylinders with an incorporated pattern to be stamped, but the problem here too is that due to the stamping length Ls specified on the basis of the cylinder diameter, a new magnetic cylinder with a correspondingly suitable circumference and thus with an appropriately adapted punching cylinder is required, which in the case of different product lengths to be punched requires the presence, i.e. the acquisition, storage and maintenance of a large number of different magnetic cylinders, which is very cost-intensive.
  • 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 unit 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 greater than the pattern length Lm and the web is guided through a deflection device for cyclically changing the web speed v to compensate for the length difference 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 of a specific punching length Ls for different lengths of products to be punched out or for different pattern lengths Lm and thus for a plurality of product lengths can be used, which reduces the cost of acquisition , stockpiling and maintenance of corresponding cutting cylinders or cutting beds are minimized.
  • the die-cutting cylinder or the die-cutting bed does not necessarily have to be exchanged when the product length or the pattern length Lm is changed, which significantly reduces set-up times.
  • the at least one deflection device comprises at least one deflection roller, the deflection roller executing a lifting movement corresponding to the punching cycle.
  • This configuration has the advantage that the web downstream of the deflection device has a cyclic speed profile, so that in the case of a rotary die-cutter the web can be die-cut during the higher web speed and that in the case of a flat-bed die-cutter the web can be die-cut at a web speed of zero, and that 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, seen in the direction of web travel LR, can be braked to a maximum of zero downstream of the deflection device.
  • FIG. 1 shows a basic structure of a stamping unit 10, as is known from the prior art.
  • the punching unit 10 includes 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 lateral surface, which is either worked as a pattern into the lateral surface of the hardened punching cylinder 11, or the punching tool 16 is a punching form 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 during punching with the web 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 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 pattern of the die-cutting tool 16 is repeated again, so that the die-cutting cylinder diameter ds in the die-cutting units 10 known from the prior art can be adapted exactly to the product length or to the sheet length Lb or to the printing length of a web-fed printing unit.
  • 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 changing 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 what is known as a variable-format printing device 20, since it can print different print lengths Lb by exchanging the printing cylinders 21 or exchanging the sleeves of the printing cylinders 21.
  • the printing device 20 can be embodied 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 is shown with a printing cylinder 21, 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 print image with the first print length Lb1 is thus printed with the first pressure cylinder 21-1, whereas after a production change including an exchange of the at least one pressure cylinder 21 with the second pressure cylinder 21-2 second print image can be printed with a second print length Lb2.
  • the second print length Lb2 is longer than the first print length Lb1.
  • the printed web 2 is fed to the stamping unit 10 for stamping the stamping pattern with the length Lm1 equal to Lb1.
  • a first die 16-1 having a die length Lw1 is mounted on the die cylinder 11 of the die 10, the die length Lw1 being equal to the pattern length Lm1.
  • the punching cylinder diameter ds is greater than the first impression cylinder diameter dd1, so the punching length Ls is greater than the pattern length Lm1.
  • a deflection device 30 is arranged in the running direction LR upstream of the stamping unit 10 , which comprises, for example, two guide rollers 31 and a deflection roller 32 , with the deflection roller 32 performing a lifting movement 33 .
  • the drive means for executing a corresponding lifting movement 33 are in 3 not shown.
  • the deflection roller 32 moves from the lower position shown in dotted lines to the upper position shown as an example, with a corresponding speed of the lifting movement 33, the web 2 that is fed in is pushed into the two ascending substrate sections between the first guide roller 31 and the deflection roller 32, viewed in the direction LR, and between of the deflection roller 32 and the second guide roller 31 viewed in the direction of travel LR, so that viewed in the direction of travel LR after the deflection device 30 the web speed v is either reduced, braked to the value zero or even reversed in direction, which corresponds to a negative value of a web speed v is equivalent to.
  • the punching of the web 2 can be carried out by the punching tool 16-1 when the punching web speed v20 is present. For this, 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 web speed v20 as peripheral speed, or the peripheral speed is even increased during this period of time.
  • the section of the circumference of the punching cylinder not occupied by a punching tool 16-1 of the punching tool length Lw1 to have a speed relative 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 clocking the leading edge of the punching tool 16 can be brought back into line with the leading edge of the printed image so that the pattern to be punched can be brought back into register on the printed image.
  • FIG. 4 shows in a diagram the course of web speed v over the duration of several punching processes for the second production with the second pattern length Lw2 when using a rotary punch.
  • the dashed line represents the printing web speed v20 and thus the web speed v in the area in front of the deflection device 30 seen in the running direction LR. It can be seen that this speed is essentially uniform, as this is generally advantageous for the printing process .
  • the term “substantially” is to be interpreted to the effect that irregularities in the substrate web, fluctuations in the web tension or control inaccuracies can 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 to say the web speed v in the running direction LR of the web 2 downstream of the deflection device 30 as seen.
  • This punching web speed v10 is in the in 4 shown example is slightly higher than the print web speed v20, since during the release of the web 2 by the deflection roller 32 executing a lifting movement 33, web 2 is also released during the downward movement.
  • the punching process takes place in a punching unit 10 designed as a rotary punching unit, which means that the punching tool 16 is in operative connection with the web 2 at this punching web speed v10.
  • the deflection roller 32 moves to the upper position. During this part of the lifting movement 33, namely the upward movement at in 3
  • the web speed v is lowered to the value zero downstream of the deflection device 30, for example.
  • the punching cylinder 11 rotates at an unchanged or even increased speed Web speed further, so that the leading edge of the punching tool 16-2 can be brought in accordance with the leading edge of the printed image and thus to the target position for the stamping pattern.
  • the deflection roller 32 moves down again and releases the web 2 stored in the deflection device 30 again, so that again sets the punching web speed v10 downstream of the deflection device 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
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 true EP4180229A1 (fr) 2023-05-17
EP4180229B1 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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EP (1) EP4180229B1 (fr)
DE (1) DE102021129745A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6230616B1 (en) * 1998-09-17 2001-05-15 Armin Steuer Storage device and its use
DE102016226167A1 (de) * 2016-05-30 2017-11-30 Koenig & Bauer Ag Vorrichtung und Verfahren zum Behandeln von Substraten

Family Cites Families (4)

* 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
DE102018219717B3 (de) 2018-11-16 2020-04-02 Koenig & Bauer Ag Bogenverarbeitende Maschine mit einer Vorrichtung zum Behandeln von Substraten

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6230616B1 (en) * 1998-09-17 2001-05-15 Armin Steuer Storage device and its use
DE102016226167A1 (de) * 2016-05-30 2017-11-30 Koenig & Bauer Ag Vorrichtung und Verfahren zum Behandeln von Substraten

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Publication number Publication date
EP4180229B1 (fr) 2024-03-27
DE102021129745A1 (de) 2023-05-17

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