EP4180192A1 - Dispositif de poinconnage a format variable et procede correspondant - Google Patents

Dispositif de poinconnage a format variable et procede correspondant Download PDF

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Publication number
EP4180192A1
EP4180192A1 EP22198079.0A EP22198079A EP4180192A1 EP 4180192 A1 EP4180192 A1 EP 4180192A1 EP 22198079 A EP22198079 A EP 22198079A EP 4180192 A1 EP4180192 A1 EP 4180192A1
Authority
EP
European Patent Office
Prior art keywords
punching
length
sheets
gap
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.)
Pending
Application number
EP22198079.0A
Other languages
German (de)
English (en)
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 EP4180192A1 publication Critical patent/EP4180192A1/fr
Pending legal-status Critical Current

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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 variable-format punching of a plurality of sheets to be punched, each sheet having a length Lb, including a feed device for sheets to be punched, a punching unit with a punching length Ls, including a punching tool with an effective punching tool length Lw.
  • the invention also relates to a method for format-variable punching or embossing of sheets with an arc length Lb, the sheet being processed with a punching device with an effective punching length Ls, the effective punching length Ls being greater than or equal to the sheet 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.
  • stamping 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 difference that is not relevant to the present invention is how high the patterns are on the stamping or embossing die and how deep they penetrate into the substrate. For this reason, only the term punching is used below, even though the term embossing is included.
  • a flatbed die cutter has a maximum working width, furthermore this 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 sheet 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 either take the form of a hardened cylinder with a punching length precisely matched to the product to be punched having 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.
  • a punching length Ls such as a punching cylinder with a defined effective diameter and consequently with a defined punching length Ls, without changing the cylinder can.
  • the device according to the invention is characterized in that the device comprises an acceleration device for generating a gap with a length LL between the supplied sheets.
  • each sheet fed to the punching device is accelerated by means of an acceleration device to produce a gap with a gap length LL.
  • 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 can be used for different lengths of punching patterns and thus for a plurality of product lengths, which reduces the expense of purchasing, storing and maintaining corresponding punching cylinders or die beds minimized.
  • the die-cutting cylinder or the die-cutting bed does not necessarily have to be exchanged when the product length is changed, which significantly reduces set-up times.
  • the acceleration device is designed to create a gap between each of the sheets fed in such that a gap with a gap length LL equal to the punching length Ls minus the sheet length Lb results.
  • This configuration has the advantage that the punching cylinder can rotate at a constant speed and/or other devices for decelerating or accelerating the punching unit or the sheets to be punched can be avoided.
  • the punching length Ls is greater than the sheet length. This makes it possible to punch arcs with an arc length up to the punching length Ls, so that they can be graduated downwards without changing the punching cylinder.
  • 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 die produced on ferromagnetic sheet metal, to 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 14 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 the sheet length Lb or to the printing length of a web printing unit.
  • the punching length Ls is an integer multiple of the Sheet length Lb or an integer multiple of the print 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 an exemplary device 1 for printing a web with a repetitive print image, for separating the web into individual sheets 3 and for punching these sheets 3.
  • Printing web 2 is just one way of producing printed sheets 3 by cross-cutting web 2 and thereby separating web 2 into sheets 3. It should be noted that sheets 3 that have already been separated can be printed and fed to device 1 according to the invention can become.
  • the device 1 according to the invention can also be operated offline and thus in parallel or independently of the printing operation.
  • the invention instead of in 1 rotary punching unit shown is possible with a flat bed punch, since this is also determined by a defined punching length Ls.
  • the substrate web 2 running through the device 1 from left to right in the running direction LR which is referred to below as web 2 for short, first runs through a printing device 20.
  • the print images with the length Lb1 are printed one after the other on web 2.
  • the printing cylinder diameter dd can normally be changed by exchanging the printing cylinder 21 or by exchanging a sleeve (not shown), although not during production.
  • a plurality of printing devices 20 of the same or different printing processes arranged one behind the other in the direction LR can also be arranged.
  • the type of printing device 20 and printing method is irrelevant to the present invention.
  • the printing device 20 can be embodied, 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 runs through a cutting device 30, with which the web 2 is divided into individual sheets 3 with the sheet length Lb1. It is self-evident that the section length corresponds to the sheet length Lb1 in order to avoid the section running through the printed image over time.
  • the cutting device 30 shown by way of example comprises a pair of cutting cylinders 31 through which the web 2 runs and is cut transversely into sheets 3 .
  • the operation of the cutting device 30 is not relevant to the present invention. It is also possible for the present invention to feed a previously printed web 2 into a cutting device 30 upstream of the stamping unit 10 and to carry out 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 production to cut the web 2 into a different sheet length Lb, for example by offsetting knives on the circumference.
  • the production of a variable arc length Lb means that the cutting device 30 also changes the arc length Lb during production could, for example, by a non-continuous peripheral speed of the cutting blade cylinder.
  • Such an embodiment is particularly important when the web 2 is printed using a printing device 20 that is completely variable in format, such as a digital printing device.
  • the printing device 20 shown as an example with a sheet length Lb1 that does not change during production separates the in 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, the punching tool length Lw1 substantially corresponding to the arc length Lb1.
  • the punching tool 16 covers the circumference of the punching cylinder 11 at least partially with its effective punching tool length Lw1.
  • the subsequently fed sheets 3 pass through an acceleration device 40, which comprises, for example, one or more draw rollers 41 or pairs of draw rollers 41.
  • this acceleration device 40 comprises, for example, an acceleration roller 42 or an acceleration cam or a belt acceleration device (not shown).
  • the acceleration device 40 accelerates the example in 3 sheets 3 arriving one after the other essentially without a gap, in order to produce a gap 4 with a gap length LL1 between the following sheets 3.
  • the acceleration device 40 can accelerate the sheets 3 in just one step to achieve the gap length LL, but it is also possible to achieve this in several individual acceleration stages carried out one after the other. Out of From the point of view of the function of the acceleration device 40, this can consequently also comprise a plurality of acceleration devices arranged one behind the other.
  • the sheets 3 accelerated in this way are now fed to the stamping unit 10 in the correct register, so that the leading edge of each sheet 3 essentially hits the leading edge of the stamping 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 impinge on any other point within each sheet 3. Due to the gap 4 between the sheets 3 created by the acceleration device 40, however, punching or embossing in register 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 supplied sheets 3 with a defined gap length LL is also possible for flat bed die-cutters with a defined punching length Ls.
  • the device 1 comprises a printing device 20 and a cutting device 30, the device 1 is also possible in the form that it comprises only at least one acceleration device 40, to which the sheets 3 are fed accordingly, and a punching unit 10 .
  • both the cutting device 30 for feeding a web 2 and/or a printing device 20 for printing be supplemented either by sequentially fed sheets 3 or a fed web 2.
  • 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 changing arc length Lb.

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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)
EP22198079.0A 2021-11-15 2022-09-27 Dispositif de poinconnage a format variable et procede correspondant Pending EP4180192A1 (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 (1)

Publication Number Publication Date
EP4180192A1 true EP4180192A1 (fr) 2023-05-17

Family

ID=83898194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22198079.0A Pending EP4180192A1 (fr) 2021-11-15 2022-09-27 Dispositif de poinconnage a format variable et procede correspondant

Country Status (2)

Country Link
EP (1) EP4180192A1 (fr)
DE (1) DE102021129700A1 (fr)

Citations (3)

* 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
DE102016209346A1 (de) * 2015-11-23 2017-05-24 Koenig & Bauer Ag Vorrichtung zum Behandeln von Substraten
US20200298436A1 (en) * 2013-05-29 2020-09-24 Bobst Mex Sa Unit for converting a continuous web substrate, and packaging production machine thus equipped

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017207706B4 (de) 2017-05-08 2019-03-28 Koenig & Bauer Ag Vorrichtung zur Überwachung des Bogenlaufs entlang einer Transportbahn
DE102019134707B4 (de) 2019-12-17 2022-12-29 Koenig & Bauer Ag Bogenverarbeitende Maschine mit einem Transportsystem
DE102019134723B4 (de) 2019-12-17 2023-01-12 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

Patent Citations (3)

* 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
US20200298436A1 (en) * 2013-05-29 2020-09-24 Bobst Mex Sa Unit for converting a continuous web substrate, and packaging production machine thus equipped
DE102016209346A1 (de) * 2015-11-23 2017-05-24 Koenig & Bauer Ag Vorrichtung zum Behandeln von Substraten

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Publication number Publication date
DE102021129700A1 (de) 2023-05-17

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