EP3431291A1 - Machine d'impression à groupe d'impression double et procédé pour opérer une telle machine d'impression - Google Patents

Machine d'impression à groupe d'impression double et procédé pour opérer une telle machine d'impression Download PDF

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Publication number
EP3431291A1
EP3431291A1 EP18180050.9A EP18180050A EP3431291A1 EP 3431291 A1 EP3431291 A1 EP 3431291A1 EP 18180050 A EP18180050 A EP 18180050A EP 3431291 A1 EP3431291 A1 EP 3431291A1
Authority
EP
European Patent Office
Prior art keywords
printing
station
double
flexographic
machine according
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
EP18180050.9A
Other languages
German (de)
English (en)
Other versions
EP3431291B1 (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
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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP3431291A1 publication Critical patent/EP3431291A1/fr
Application granted granted Critical
Publication of EP3431291B1 publication Critical patent/EP3431291B1/fr
Active legal-status Critical Current
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
    • 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
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing
    • 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

Definitions

  • the invention relates to a printing machine according to the preamble of claim 1 and a method for operating such a printing press having the features of claim 19.
  • Printing presses designed or used for packaging printing are becoming increasingly demanding in terms of economy and ease of operation while maximizing variability in product manufacturing.
  • the press should cause as little waste as possible, for example, when retooling between different print jobs.
  • Common for packaging printing, especially in flexographic printing designed line printing machines in a row usually have a machine structure in which a substrate over a variety of cylinders and rollers between different process levels (for example, for printing and drying) is performed, so that not one Insignificantly long web section is stored in the printing press and potentially corresponding waste can occur.
  • inline presses for printing and rotary blanking of carton blanks are known, for example from US Pat EP 1 731 277 B1 .
  • a web-shaped substrate in a web printing machine with multiple printing units if necessary.
  • the printing substrate is further processed by punching, embossing, painting, etc.
  • the printing units for a quick job change with so-called sleeves can be fitted.
  • the axes of the sleeves can be moved by motor to a change position in which the axes are easily accessible. After the sleeves have been replaced, they are moved back together with their axes from an exchange position to an operating position.
  • Object of the present invention is therefore to provide a printing machine, which allows a simple and quick job change and thereby generates as little waste as possible and to describe a method for operating such a printing press.
  • the printing machine according to the invention is used for printing a printing material web, in particular made of paper, cardboard or plastic, and has a plurality of flexographic printing units arranged in series. Due to the row construction, the printing press can be extended as desired.
  • the flexographic printing units are arranged in an accessible to a machine operator, in particular horizontal and horizontal plane, on an ergonomically easily accessible height level.
  • two flexographic printing units always form a double printing station.
  • the two flexographic printing units of a printing station have one common impression cylinder on.
  • This design 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 will produce a continuous production, i. a flying order change, allows. Alternatively, 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 arranged mirror-symmetrically to the common impression cylinder. While printing in a flexographic printing press, the other flexographic printing press can be equipped or maintained.
  • each double printing station is followed by a dryer.
  • a dryer This has the advantage that after the application of paint, a complete drying of the applied amount of ink can be done and the printing material can be deflected so easily without it comes to a greasing.
  • each double printing station comprises at least one dryer, preferably two or four dryers.
  • the dryer is a UV dryer or that the dryer are UV dryers. It is further preferred that the common impression cylinder of a respective double-pressure station is designed as a cooling cylinder.
  • each double-pressure station on the circumference of the cooling cylinder in the printing material transport direction are arranged successively: a flexographic printing; 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 pressure sleeve bearing the printing plate.
  • a respective impression cylinder has a circumference of less than 1000 mm (in the case of hot air drying).
  • At least one further flexographic printing unit is present as a single printing station, preferably as a coating unit.
  • 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 individual printing station of the double printing station - or a last double printing station - is arranged downstream in the printing material transport direction.
  • the counter-pressure cylinder is designed as a cooling cylinder and arranged successively on the circumference of the cooling cylinder in the printing material transport direction: a flexographic printing; and one or two UV dryers
  • the printing material web 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-Druckstation- and the Single printing station runs in a second plane, which lies substantially below the plane.
  • the length of the printing material web on the section - or on all sections - is less than the length of the printing material web 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 leads around the impression cylinder and at least two or three guide rollers, which is or are arranged between the plane and the further plane.
  • the last double-printing station, a single-pressure station and a hot-air dryer in the printing material transport direction are arranged downstream of each other.
  • the invention also relates to a method for operating a printing press, as described above, for printing on a printing material web.
  • a maximum of one flexographic printing unit is activated by the two flexographic printing units of a respective double printing station and printed on the printing material web.
  • the respective other flexographic printing unit ie the inactive printing unit of a double-printing station, can undergo a set-up procedure or a maintenance procedure or it is in an inactive waiting position.
  • a set-up operation for example, an exchange of printing sleeves or a color change can take place. So also special colors can be used and exchanged.
  • the maintenance process may be, for example, a knife change on the doctor blade.
  • the flexographic printing units of a respective double-printing station can be activated in register and deactivated so as to enable a flying change between the flexographic printing units when a job is changed. That is, it should be at a job change from a flexographic printing on the other Flexographic printing are switched to a printing station, the flexographic printing of the various printing stations are synchronized with each other so that between the jobs no waste is produced and the substrate web can be continuously printed on.
  • a method according to the invention can also provide that both of the two flexographic printing units of a printing station are activated and print on the printing material web.
  • a machine with four printing stations can print eight colors instead of just four according to this alternative.
  • FIG. 3 shows a rotary printing machine 100 according to the prior art for printing a printing substrate 1.
  • the printing substrate 1 is transported in the transport direction T through a plurality of processing plants and thereby processed.
  • the processing tools are flexographic printing units 11, an embossing unit 12 and a stamping and Rilltechnik 13.
  • Adjacent to the web of the printing material 1 inspection systems 4 are provided, which are designed for example as cameras to continuously register accuracy of the processing of the printing substrate 1 monitor. In particular, the circumferential register and the page register are monitored.
  • the inspection systems 4 and the flexographic printing units 11, embossing unit 12 and punching and Rilltechnik 13 are data transmission technology connected to a control unit 22 and can be controlled by this.
  • FIG. 1 shows a printing machine 100 in an overview.
  • the printing machine 100 has a plurality of flexographic printing units 11. With the flexographic printing units 11, a printing material web 1 moved in the web transport direction T is printed.
  • the flexographic printing units 11 are numbered DW1 to DW7.
  • the flexographic printing units 11 are arranged in a row on a horizontal plane E that is easily accessible to a machine operator.
  • Two flexographic printing units 11 together form a printing station 10, so 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 example, a two-dimensional paint application.
  • the color becomes magenta
  • the color becomes cyan
  • the third printing station 10 DW3 becomes the color yellow
  • in the sixth printing station DW6 the color black prints.
  • special colors S1 and S2 are printed. Seen in the web running direction T after each printing station 10, a dryer 19 is provided.
  • a printing material web 1 transported in the web transport direction T is guided by means 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 two flexographic printing units 11 have a common counter-pressure cylinder 16.
  • the arrangement of flexographic 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 such that one of the two flexographic printing 11 prints and this flexographic printing unit 11 is in an activated position.
  • the other, inactive flexographic printing unit 11 was turned off by the common impression cylinder 16.
  • the activation or deactivation of a flexographic printing unit 11 is effected by an adjusting movement s.
  • a first print job is processed in each case in the right flexographic printing units 11 of a respective printing station 10.
  • a second application 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, eg a knife change can be carried out on the doctor blade.
  • the right flexo 11 automatically moves to an inactive wait position and at the same time the left flexo 11 moves to an active position to print the second job. Print end of a first print job and print start of a second, subsequent print job are thus almost the same time.
  • This process which was described for a first printing station 10, also takes place in the other Printing stations 10, and that exact distance, ie in the second printing station 10, the switching from first to second order and thus switching from right flexographic printing 11 to left flexographic printing 11 exactly at the location of the printing substrate 1, where the first printing station 10 has completed the change , So waste, ie waste, can be saved.
  • the flexographic printing units 11 of the various printing stations 10 synchronize register-accurate during a job change, so that virtually no waste arises.
  • the change from a print job to a subsequent print job is event-driven.
  • the triggering event can be a certain printing time, a certain printed length on the substrate web, a certain number of printed uses, a change of material or a triggering by the machine operator.
  • the printing machine 100 is able to simultaneously prepare while preparing a current print job next print jobs and process them in order.
  • FIG. 4 shows the difference between a DID station 31 (left in the figure) and a SID station 30 (right in the figure). Such stations may be used in the configurations shown in this application (see eg FIG. 7 ) be provided.
  • Both stations are designed as so-called "short web” stations:
  • the dryer section can be chosen much shorter, especially UV dryers can be arranged to save space on the circumference of a (central) impression cylinder.
  • the web guide between the stations can also be done in a plane below the machine operator accessible level E. The web guide is thus "from below” to the stations.
  • the short track path between the stations ensures improved register behavior.
  • the start-up process of the printing press is significantly shortened in terms of time.
  • the (central) impression cylinder is preferably designed as a cooling cylinder.
  • the DID station 31 comprises the following: a deflection roller 20 for the web 1, a central counter-pressure cylinder 16, associated therewith a first flexographic printing unit 11 (with flexographic printing cylinder 15 and inking device 21, eg a raster cylinder), or (as in FIG two dryers 19, a second flexographic printing unit 11, one or (as shown) two further dryers 19 and two deflection rolls 20.
  • the dryers are preferably UV dryers.
  • Such a station can simultaneously transmit two colors.
  • the SID station 30 includes in the direction of the substrate transport: two guide rollers 20 for the web 1, a central impression cylinder 16, this associated with a first flexographic printing unit 11 (with flexographic printing cylinder 15 and inking device 21, such as a raster cylinder), or (as shown) two dryers 19 and a guide roller 20.
  • the dryers are preferably UV dryers.
  • Such a station can transmit a color.
  • the other work of the station may be converted during this (“flying"), i. Plate change and / or color change.
  • FIG. 5 shows a DID station with two simultaneously activatable flexographic printing units 11. At (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
  • FIG. 6 shows a DID station with two alternately activatable flexographic printing units 11.
  • the dryers are preferably UV dryers.
  • FIG. 7 shows another application. It is a machine with 4 DID short web stations 31 and a SID station 30 and a final thermal dryer 19. It can be applied eight colors and a paint or silicone. Between the last station 31 and the station 30, a web guide 40 is provided. Such an application is used, for example, in the production of so-called "Gable Top” packages.
  • FIG. 8 shows a configuration with four SID stations 30 followed by two DID stations 31. Each station is associated with a thermal dryer 19. The track is "from above” to the stations.
  • the printing sequences can be: process colors CMYK, spot color 1, special color 3.
  • spot color works can be converted to other special colors 2 and 4 during the current production.
  • FIG. 9 shows a configuration with four DID stations 31 followed by four SID stations 30. Each station is associated with a thermal dryer 19. The track is "from above” to the stations.
  • the print sequences can be: process colors CMYK, spot color 1, special color 2.
  • the last two stations 30 are inactive and are prepared or converted eg 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)
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 true EP3431291A1 (fr) 2019-01-23
EP3431291B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3988305A1 (fr) * 2020-10-22 2022-04-27 Heidelberger Druckmaschinen AG Procédé de fonctionnement d'une machine d'impression flexographique, machine d'impression flexographique, système et manchon pour une forme d'impression flexographique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111823739B (zh) * 2020-07-16 2022-03-04 北人智能装备科技有限公司 一种ci柔性版印刷设备连续运行切换订单的控制方法
DE102021126115A1 (de) * 2020-10-22 2022-04-28 Heidelberger Druckmaschinen Aktiengesellschaft Druckmaschine mit Zwillingsdruckwerk und Verfahren zum Betreiben einer solchen Druckmaschine
PL3988307T3 (pl) * 2020-10-22 2023-09-25 Heidelberger Druckmaschinen Ag Sposób sterowania działaniem maszyny do druku fleksograficznego oraz maszyna do druku fleksograficznego i system obejmujący maszynę do druku fleksograficznego i urządzenie pomiarowe do pomiaru gęstości punktów formy lub tulei do druku fleksograficznego

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EP0234456A2 (fr) * 1986-02-17 1987-09-02 OFFICINE MECCANICHE GIOVANNI CERUTTI S.p.A. Dispositif d'impression complémentaire
US5503069A (en) * 1993-12-06 1996-04-02 Albert-Frankenthal Aktiengesellschaft Inking and printing system
DE10343411B4 (de) 2003-09-19 2009-07-23 Gallus Druckmaschinen Gmbh Rotationsdruckmaschine und Verfahren zum freien Zugänglichmachen eines Druckzylinders oder eines Linearführungs-Zylinders
EP1731277B1 (fr) 2005-06-10 2011-11-02 Bobst S.A. Station de transformation pour une machine de production d'emballages
EP2551078A1 (fr) * 2011-07-25 2013-01-30 Gallus Druckmaschinen GmbH Dispositif d'estampage avec distance réglable entre les cylindres

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EP0234456A2 (fr) * 1986-02-17 1987-09-02 OFFICINE MECCANICHE GIOVANNI CERUTTI S.p.A. Dispositif d'impression complémentaire
US5503069A (en) * 1993-12-06 1996-04-02 Albert-Frankenthal Aktiengesellschaft Inking and printing system
DE10343411B4 (de) 2003-09-19 2009-07-23 Gallus Druckmaschinen Gmbh Rotationsdruckmaschine und Verfahren zum freien Zugänglichmachen eines Druckzylinders oder eines Linearführungs-Zylinders
EP1731277B1 (fr) 2005-06-10 2011-11-02 Bobst S.A. Station de transformation pour une machine de production d'emballages
EP2551078A1 (fr) * 2011-07-25 2013-01-30 Gallus Druckmaschinen GmbH Dispositif d'estampage avec distance réglable entre les cylindres

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3988305A1 (fr) * 2020-10-22 2022-04-27 Heidelberger Druckmaschinen AG Procédé de fonctionnement d'une machine d'impression flexographique, machine d'impression flexographique, système et manchon pour une forme d'impression flexographique

Also Published As

Publication number Publication date
DE102017222700A1 (de) 2019-01-17
CN109263244B (zh) 2021-11-12
US20190016111A1 (en) 2019-01-17
US10919289B2 (en) 2021-02-16
EP3431291B1 (fr) 2022-08-10
CN109263244A (zh) 2019-01-25

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