EP3431291B1 - Machine d'impression avec des groupes d'impression flexographique arrangés en série et procédé pour opérer une telle machine d'impression - Google Patents

Machine d'impression avec des groupes d'impression flexographique arrangés en série et procédé pour opérer une telle machine d'impression Download PDF

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Publication number
EP3431291B1
EP3431291B1 EP18180050.9A EP18180050A EP3431291B1 EP 3431291 B1 EP3431291 B1 EP 3431291B1 EP 18180050 A EP18180050 A EP 18180050A EP 3431291 B1 EP3431291 B1 EP 3431291B1
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EP
European Patent Office
Prior art keywords
printing
station
flexographic
units
flexographic printing
Prior art date
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Active
Application number
EP18180050.9A
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German (de)
English (en)
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EP3431291A1 (fr
Inventor
Werner Schwab
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Publication of EP3431291A1 publication Critical patent/EP3431291A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • B41F23/0409—Ultraviolet dryers
    • 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
    • B41F13/26—Arrangement of cylinder bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F3/00—Cylinder presses, i.e. presses essentially comprising at least one cylinder co-operating with at least one flat type-bed
    • B41F3/02—Cylinder presses, i.e. presses essentially comprising at least one cylinder co-operating with at least one flat type-bed with impression cylinder or cylinders rotating unidirectionally
    • B41F3/12—Twin presses, i.e. with more than one cylinder or type-bed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/04—Rotary letterpress machines for printing on webs
    • B41F5/06—Rotary letterpress machines for printing on webs with several printing units in sequential arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing

Definitions

  • the invention relates to a printing machine according to the preamble of claim 1 and a method for operating such a printing machine having the features of claim 14.
  • inline machines for printing and rotary die-cutting of box blanks are known, for example from EP 1 731 277 B1 .
  • a web-shaped substrate is printed in a web printing machine with a plurality of printing units, possibly using different printing methods.
  • the web of printing material is then further processed by punching, embossing, varnishing, etc.
  • a rotary printing machine known with a plurality of printing units, wherein the printing units for a quick job change with so-called sleeves can be fitted.
  • the axes of the sleeves can be moved into a changing position by motor, in which the axes are easily accessible. After the sleeves have been changed, they are moved back together with their axes from an exchange position to an operating position.
  • the EP2551078A1 discloses - according to the preamble of claim 1 - a printing machine for printing a printing material web with a plurality of flexographic printing units arranged in a row, the flexographic printing units being arranged in a plane accessible to the machine operator.
  • the EP0234456A2 discloses an additional printing unit, for example an additional flexographic printing unit.
  • two pressure cylinders are provided for receiving the printing plates, which are used alternately and selectively to create additional impressions in a paper web or similar material that is moved around a common impression cylinder.
  • These additional printing devices are mostly used in rotary printing machines, where such additional devices are arranged at the outlet of the main machine. The main engine is not described in detail.
  • the US5503069A1 reveals similar.
  • a disadvantage of the printing presses known from the prior art is that changing the sleeves requires a break in printing, with the downtime reducing the performance of the printing press. If a color change is required, longer downtimes are required. Furthermore, every time the machine stops, there is start-up waste, i.e. printed substrate web, which is scrap.
  • a printing machine for printing a printing material web with a plurality of flexographic printing units arranged in a row, with the flexographic printing units being arranged in a plane accessible to the machine operator, is characterized in that two flexographic printing units of the plurality of flexographic printing units together form respective double printing stations and that the two flexographic printing units of the respective double printing stations have a common impression cylinder.
  • the printing machine serves to print a printing material web, in particular made of paper, cardboard or plastic, and has a plurality of flexographic printing units arranged in a row. Due to the in-line design, the printing machine can be expanded as required.
  • the flexographic printing units are arranged in a plane that is accessible to a machine operator, in particular a horizontal plane, at an ergonomically easily accessible height level.
  • two flexographic printing units together always form a double printing station.
  • the two flexographic printing units of a printing station each have a common impression cylinder.
  • This structure of a printing station can be referred to as a twin printing unit or so-called double ink deck, DID, in contrast to the so-called single ink deck, SID.
  • the two flexographic printing units of a respective double printing station can be activated alternatively. This enables continuous production, i.e. a flying order change. As an alternative to this, the two flexographic printing units of a respective double printing station can be activated together.
  • the two flexographic printing units of a respective double printing station are mirror-symmetrical to the common impression cylinder arranged. While printing is in one flexo printing unit, the other flexo printing unit can be set up or serviced.
  • each double printing station is followed by a dryer.
  • a dryer This has the advantage that after the application of ink, the applied amount of ink can be completely dried and the web of printing material can be deflected without any problems, without smearing occurring.
  • each double printing station includes at least one dryer, preferably two or four dryers.
  • the dryer is a UV dryer or that the dryers are UV dryers. It is also preferred that the common impression cylinder of a respective double printing station is designed as a cooling cylinder.
  • each double printing station on the circumference of the cooling cylinder in the direction of transport of the printing material the following are arranged one after the other: a flexographic printing unit; one or two UV dryers; a flexographic printing unit; and one or two UV dryers.
  • a respective flexographic printing unit is equipped with an inking device and with a flexographic printing cylinder with a printing sleeve carrying the printing form.
  • a respective impression cylinder has a circumference of less than 1000 mm (in the case of hot-air drying).
  • the individual printing station is arranged in front of the plurality of flexographic printing units or that the individual printing station is arranged after the plurality of flexographic printing units.
  • the single printing station is arranged downstream of the double printing station—or a last double printing station—in the printing material transport direction.
  • the impression cylinder in the individual printing station is designed as a cooling cylinder and that the following are arranged one after the other on the circumference of the cooling cylinder in the printing material transport direction: a flexographic printing unit; and one or two UV dryers
  • the printing material on a section - or on all sections - a) between two double printing stations and / or b) between the double printing station - or a last double printing station - and the Single printing station runs in a second level, which is substantially below the level.
  • the length of the web of printing material on the section—or on all sections— is less than the length of the web of printing material in a double printing station.
  • the printing material web forms a downwardly open loop starting from the second level in each double printing unit.
  • the loop runs around the impression cylinder and around at least two or three guide rollers, which is or are arranged between the plane and the further plane.
  • the last double printing station is followed in succession by a single printing station and a hot-air dryer in the printing material transport direction.
  • the invention also relates to a method for operating a printing press, as described above, for printing a printing material web.
  • a maximum of one flexographic printing unit of the two flexographic printing units of a respective double printing station is activated and prints onto the printing material web.
  • the respective other flexographic printing unit i.e. the inactive printing unit, can advantageously be subjected to a double printing station, a set-up process or a maintenance process, or it is in an inactive waiting position.
  • a set-up process for example, print sleeves can be exchanged or colors can be changed. Special colors can also be easily used and exchanged.
  • the maintenance process can be, for example, a blade change on the squeegee.
  • the flexographic printing units of a respective double printing station can be activated and deactivated with register accuracy in order to enable a flying change between the flexographic printing units when changing jobs. This means that when there is a job changeover, there should be a switchover from one flexo printing unit to the other flexo printing unit in a printing station, so the flexo printing units of the various printing stations are synchronized with one another in such a way that no waste is produced between the jobs and the printing material can continue to be printed on continuously.
  • FIG 3 shows a rotary printing machine 100 according to the prior art for printing a printing material web 1.
  • the printing material web 1 is transported in the transport direction T through a plurality of processing units and processed in the process.
  • the processing tools are flexographic printing units 11, an embossing unit 12 and a punching and creasing unit 13.
  • Inspection systems 4 are provided adjacent to the path of the printing material web 1, which are designed as cameras, for example, in order to continuously improve the register accuracy of the processing of the printing material web 1 monitor. In particular, the circumferential register and the lateral register are monitored.
  • the inspection systems 4 and the flexographic printing units 11, embossing unit 12 and punching and creasing unit 13 are connected to a control unit 22 for data transmission and can be controlled by the same.
  • FIG 1 shows a printing machine 100 in an overview.
  • the printing press 100 has a plurality of flexographic printing units 11 .
  • a printing material web 1 moving in the web transport direction T is printed with the flexographic printing units 11 .
  • the flexographic printing units 11 are numbered consecutively with DW1 to DW7.
  • the flexographic printing units 11 are arranged in a row on a horizontal level E that is easily accessible for a machine operator.
  • Two flexographic printing units 11 together form a printing station 10, at least in DW1 to DW6, which can also be referred to as a twin printing unit.
  • the DW7 is designed as a conventional flexographic printing unit 11 . In this, for example, a flat application of paint can take place.
  • the color magenta is printed in the first printing station 10 DW1, the color cyan is printed in the second printing station 10 DW2, the color yellow is printed in the third printing station 10 DW3 and the color black is printed in the sixth printing station DW6.
  • Special colors S1 and S2 are printed in the further printing stations 10 DW4 and DW5.
  • a dryer 19 is provided after each printing station 10, viewed in the direction of web travel T.
  • flexographic printing units 11 can - as well as in the printing press 100 from figure 3 -
  • An embossing unit 12, a punching and creasing unit 13 and a control unit 22 may be provided.
  • a printing material web 1 transported in web transport direction T is guided with the aid of deflection rollers 20 and wraps around an impression cylinder 16.
  • Two flexographic printing units 11, each with a flexographic printing cylinder with printing sleeve 15, an impression cylinder 16 and an inking device 21, form a printing station 10.
  • the flexographic printing units 11 with their components are arranged in a plane E.
  • the two flexographic printing units 11 have a common impression cylinder 16.
  • the arrangement of flexographic printing cylinders 15 and inking device 21 of the two flexographic printing units 11 is mirror-symmetrical to a vertical mirror axis through the impression cylinder 16.
  • the printing station 10 is designed in such a way that one of the two flexographic printing units 11 prints and this flexographic printing unit 11 is in an activated position.
  • the other, inactive flexographic printing unit 11 was shared Impression cylinder 16 turned off.
  • the activation or deactivation of a flexographic printing unit 11 is effected by an actuating movement s figure 1 and figure 2 a first print job is processed in the right flexographic printing units 11 of a respective printing station 10.
  • a second job can be prepared in the left-hand flexographic printing unit 11 of the printing stations 10, or this flexographic printing unit 11 can be serviced, for example a blade change can be carried out on the squeegee.
  • the right flexographic printing unit 11 automatically moves into an inactive waiting position and at the same time the left flexographic printing unit 11 moves into an active position in order to print the second order.
  • the end of printing of a first print job and the start of printing of a second, subsequent print job are therefore almost at the same time.
  • This process which has been described for a first printing station 10, also takes place in the other printing stations 10, precisely for the stretch, ie in the second printing station 10 the switchover from the first to the second order takes place and thus the switchover from the right flexographic printing unit 11 to the left flexographic printing unit 11 exactly at the point of the printing substrate web 1 where the first printing station 10 has completed the change. Waste, ie waste, can thus be saved.
  • the flexographic printing units 11 of the various printing stations 10 are synchronized with register accuracy when there is a job change, so that there is almost no waste.
  • the change from one print job to a subsequent print job is event-driven.
  • the triggering event can be a specific printing time, a specific printed length on the substrate web, a specific number of printed copies, a change of material or a trigger by the machine operator.
  • figure 4 shows the difference between a DID station 31 (on the left in the figure) and a SID station 30 (on the right in the figure).
  • Such stations can, in the configurations shown in this application (see e.g figure 7 ) be provided.
  • Both stations are designed as so-called "short web” stations:
  • the drying section can be much shorter.
  • UV dryers can be arranged on the circumference of a (central) impression cylinder to save space.
  • the web guide between the stations can also take place on a level below level E, which is accessible to the machine operator. The web is thus guided "from below” to the stations.
  • the short path between the stations ensures improved register behavior.
  • the start-up process for the printing press is also significantly shorter.
  • the (central) impression cylinder is preferably designed as a cooling cylinder.
  • the DID station 31 comprises the following in the direction of the printing material transport: a deflection roller 20 for the web 1, a central impression cylinder 16, assigned to this a first flexographic printing unit 11 (with flexographic printing cylinder 15 and inking device 21, e.g. a screen cylinder), one or (like shown) two dryers 19, a second flexographic printing unit 11, one or (as shown) two further dryers 19 and two deflection rollers 20.
  • the dryers are preferably UV dryers.
  • Such a station can transmit two colors at the same time.
  • the SID station 30 comprises the following in the direction of the printing material transport: two deflection rollers 20 for the web 1, a central impression cylinder 16, assigned to this a first flexographic printing unit 11 (with flexographic printing cylinder 15 and inking device 21, e.g. a screen cylinder), one or (like shown) two dryers 19 and a deflection roller 20.
  • the dryers are preferably UV dryers. Such a station can transmit one color.
  • figure 5 shows a DID station with two flexographic printing units 11 that can be activated simultaneously.
  • On the (central) impression cylinder 16 one or (as shown) two dryers 19 are arranged after each flexographic printing unit 11.
  • the dryers are preferably UV dryers
  • figure 6 shows a DID station with two flexographic printing units 11 that can be activated alternately.
  • One or (as shown) two dryers 19 are arranged on the (central) impression cylinder 16 after the last flexographic printing unit 11 .
  • the dryers are preferably UV dryers.
  • figure 7 shows another application. This is a machine with 4 DID short web stations 31 and one SID station 30 and a final thermal dryer 19. Eight colors and a lacquer or silicone can be applied. A web guide 40 is provided between the last station 31 and the station 30 . Such an application is used, for example, in the production of so-called "gable top" packaging.
  • figure 8 shows a configuration with four SID stations 30 followed by two DID stations 31.
  • a thermal dryer 19 is associated with each station.
  • the web is guided "from above” to the stations.
  • the printing sequences can be: CMYK process colors, spot color 1, spot color 3.
  • the spot color units can be converted to other spot colors 2 and 4 during ongoing production.
  • figure 9 shows a configuration with four DID stations 31 followed by four SID stations 30.
  • a thermal dryer 19 is associated with each station.
  • the web is guided "from above” to the stations.
  • the printing sequences can be: process colors CMYK, spot color 1, spot color 2.
  • the last two stations 30 are inactive and are prepared or converted, for example, for an upcoming print job (spot colors 3 and 4).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Rotary Presses (AREA)
  • Printing Methods (AREA)

Claims (16)

  1. Machine à imprimer (100) pour imprimer une bande de support d'impression (1) avec une pluralité de groupes d'impression flexographique (11) disposés en série, les groupes d'impression flexographique (11) étant disposés dans un plan (E) accessible par l'opérateur de la machine,
    caractérisée en ce
    que deux groupes d'impression flexographique (11) parmi la pluralité de groupes d'impression flexographique (11) forment toujours ensemble des postes d'impression doubles (10) respectifs et en ce que les deux groupes d'impression flexographique (11) des postes d'impression doubles (10) respectifs présentent un cylindre d'impression commun (16).
  2. Machine à imprimer selon la revendication 1,
    caractérisée en ce
    que les deux groupes d'impression flexographique (11) d'un poste d'impression double (10) respectif peuvent être activés ensemble ou alternativement.
  3. Machine à imprimer selon l'une des revendications précédentes,
    caractérisée en ce
    que les deux groupes d'impression flexographique (11) d'un poste d'impression double (10) respectif sont disposés de manière symétrique par rapport au cylindre d'impression (16) commun.
  4. Machine à imprimer selon l'une des revendications précédentes,
    caractérisée en ce
    que chaque poste d'impression double (10) est suivi d'un sécheur (19) ou que chaque poste d'impression double (10) comprend au moins un sécheur (19), ou deux sécheurs ou quatre sécheurs.
  5. Machine à imprimer selon la revendication 4,
    caractérisée en ce
    que le sécheur (19) est un sécheur UV ou en ce que les sécheurs (19) sont des sécheurs UV.
  6. Machine à imprimer selon l'une des revendications 4 ou 5,
    caractérisée en ce
    que le cylindre d'impression (16) commun d'un poste d'impression double (10) respectif est réalisé sous la forme d'un cylindre de refroidissement (16).
  7. Machine à imprimer selon la revendication 6,
    caractérisée en ce
    que, dans chaque poste d'impression double (10), sont disposés successivement sur la circonférence du cylindre de refroidissement (16), dans le sens de transport de la bande (T) :
    - un groupe d'impression flexographique (11) ;
    - un ou deux sécheurs UV (19) ;
    - un groupe d'impression flexographique (11) ;et
    - un ou deux sécheurs UV (19).
  8. Machine à imprimer selon l'une des revendications précédentes,
    caractérisée en ce
    qu'un groupe d'impression flexographique (11) respectif est équipé d'un dispositif d'application d'encre (21) et d'un cylindre d'impression flexographique (15) avec un manchon d'impression supportant la forme à imprimer.
  9. Machine à imprimer selon l'une des revendications précédentes,
    caractérisée en ce
    qu'un cylindre d'impression (16) respectif présente une circonférence inférieure à 1000 mm.
  10. Machine à imprimer selon l'une des revendications précédentes,
    caractérisée en ce
    qu'en plus de la pluralité de groupes d'impression flexographique (11), il existe au moins un autre groupe d'impression flexographique (11) comme poste d'impression individuel (10) ou comme groupe de vernissage (10).
  11. Machine à imprimer selon la revendication 10,
    caractérisée en ce
    le poste d'impression individuel (10a) est disposé dans le sens du transport de la bande (T) en amont de la pluralité de groupes d'impression flexographique (11), ou bien que le poste d'impression individuel (10a) est disposé dans le sens du transport de la bande (T) en aval de la pluralité de groupes d'impression flexographique (11).
  12. Machine à imprimer selon la revendication 11,
    caractérisée en ce
    que, dans le poste d'impression individuel (10a), le cylindre d'impression (16) est réalisé sous la forme d'un cylindre de refroidissement (16) et en ce que, sur la circonférence du cylindre de refroidissement (16), sont disposés successivement, dans le sens de transport de la bande (T) :
    - un groupe d'impression flexographique (11) ;et
    - un ou deux sécheurs UV (19).
  13. Machine à imprimer selon l'une des revendications précédentes,
    caractérisée en ce
    que le dernier poste d'impression double (10) est suivi d'un poste d'impression individuel (10a) et d'un sécheur à air chaud dans le sens du transport de la bande (T).
  14. Procédé d'exploitation d'une machine à imprimer (100) selon l'une des revendications précédentes, pour l'impression d'une bande de support d'impression (1), pour lequel une machine à imprimer (100) selon l'une des revendications précédentes est prévue et exploitée et pour lequel, parmi les deux groupes d'impression flexographique (11) d'un poste d'impression double (10) respectif de la machine à imprimer (100), un groupe d'impression flexographique (11) au maximum est activé et imprime.
  15. Procédé d'exploitation d'une machine à imprimer selon la revendication 14,
    caractérisé en ce
    que l'autre groupe d'impression flexographique (11) respectif d'un poste d'impression double (10) est soumis à une opération de préparation ou à une opération d'entretien.
  16. Procédé d'exploitation d'une machine à imprimer selon l'une des revendications 14 ou 15,
    caractérisé en ce
    que les deux groupes d'impression flexographique (11) d'un poste d'impression double respectif (10) peuvent être activés et désactivés en parfait repérage.
EP18180050.9A 2017-07-17 2018-06-27 Machine d'impression avec des groupes d'impression flexographique arrangés en série et procédé pour opérer une telle machine d'impression Active EP3431291B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017212183 2017-07-17
DE102017222700.1A DE102017222700A1 (de) 2017-07-17 2017-12-14 Druckmaschine mit Zwillingsdruckwerk und Verfahren zum Betreiben einer solchen Druckmaschine

Publications (2)

Publication Number Publication Date
EP3431291A1 EP3431291A1 (fr) 2019-01-23
EP3431291B1 true EP3431291B1 (fr) 2022-08-10

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EP18180050.9A Active EP3431291B1 (fr) 2017-07-17 2018-06-27 Machine d'impression avec des groupes d'impression flexographique arrangés en série et procédé pour opérer une telle machine d'impression

Country Status (4)

Country Link
US (1) US10919289B2 (fr)
EP (1) EP3431291B1 (fr)
CN (1) CN109263244B (fr)
DE (1) DE102017222700A1 (fr)

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DE102021126115A1 (de) * 2020-10-22 2022-04-28 Heidelberger Druckmaschinen Aktiengesellschaft Druckmaschine mit Zwillingsdruckwerk und Verfahren zum Betreiben einer solchen Druckmaschine
DE102021125060A1 (de) * 2020-10-22 2022-04-28 Heidelberger Druckmaschinen Aktiengesellschaft Verfahren zum Betreiben einer Flexodruckmaschine, Flexodruckmaschine, System und Hülse für eine Flexodruckform

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US10919289B2 (en) 2021-02-16
US20190016111A1 (en) 2019-01-17
CN109263244B (zh) 2021-11-12
EP3431291A1 (fr) 2019-01-23
DE102017222700A1 (de) 2019-01-17
CN109263244A (zh) 2019-01-25

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