WO2009018951A2 - Traitement par plasma par compression - Google Patents

Traitement par plasma par compression Download PDF

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Publication number
WO2009018951A2
WO2009018951A2 PCT/EP2008/006270 EP2008006270W WO2009018951A2 WO 2009018951 A2 WO2009018951 A2 WO 2009018951A2 EP 2008006270 W EP2008006270 W EP 2008006270W WO 2009018951 A2 WO2009018951 A2 WO 2009018951A2
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
printing machine
fed printing
printed
surface modification
Prior art date
Application number
PCT/EP2008/006270
Other languages
German (de)
English (en)
Other versions
WO2009018951A3 (fr
Inventor
Jürgen Schölzig
Guido Reschke
Original Assignee
Manroland 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 Manroland Ag filed Critical Manroland Ag
Priority to AT08785216T priority Critical patent/ATE517746T1/de
Priority to EP08785216A priority patent/EP2178704B1/fr
Publication of WO2009018951A2 publication Critical patent/WO2009018951A2/fr
Publication of WO2009018951A3 publication Critical patent/WO2009018951A3/fr

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/04—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs
    • B41F7/06—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs for printing on sheets

Definitions

  • the invention relates to a sheet-fed printing machine according to the preamble of claim 1.
  • Sheet-fed printing presses are used for printing sheet-like printing materials, so-called printing sheets, wherein printed sheets to be printed in the area of an investor are introduced into a printing process and discharged from the printing process in the region of a delivery arm. Between the feeder and the boom of the printing press several printing units are positioned, wherein in each printing unit a partial printing image in a special ink or a different type of coating are applied to the substrate.
  • the printed sheets to be printed can be made of a variety of different materials. If printed sheets designed as plastic films or provided with a plastic coating are to be printed, then it should be noted that in particular UV-curing printing inks or water-based printing inks adhere only very poorly to the printed sheet. This is especially the case when printing sheets from difficult to print substrates or corresponding coatings such as polypropylene (PP, HDPP, LDPP) or polyethylene (PE, HDPE, LDPE) are to be printed. Thus, these plastics are matehals which, due to their production, have a low surface tension and / or a low polarity. This results in printing with UV-curing inks or paints or water-based inks or paints poor wetting of such sheets and / or poor adhesion of the ink or varnish on the sheet.
  • DE 102 32 255 A1 discloses a device for treating the surfaces of printing substrates in printing machines, wherein the printing material is bombarded in the region of a corona electrode with charge elements originating from discharge processes, such as eg electrons.
  • a metallic or conductive printing cylinder on which the printing material is guided on passing the corona electrode, serves as the counterelectrode, so that an electrical discharge, which is carried out between the corona electrode and the printing cylinder serving as the counterelectrode, passes through the printing substrate through.
  • DE 20 2004 008 285 U1 discloses an atmospheric pressure plasma treatment tool for wide workpieces in which electrical discharges occur between electrodes and counter electrodes formed as nozzles.
  • the electrodes and the counter electrodes formed as a nozzle are positioned on one side of a substrate to be treated so that the electrical discharge does not occur through the substrate.
  • a plasma generated during the electric corona discharge is conducted by means of a gas, namely with the aid of compressed air, onto the surface of the substrate to be treated.
  • a gas namely with the aid of compressed air
  • other gases for example nitrogen, can be used to transport the plasma in the direction of the substrate.
  • the present invention is based on the problem to provide a novel sheet-fed printing machine.
  • a sheet-fed printing machine according to claim 1.
  • the or each device for surface modification of printing substrates in the region of a module is integrated into the sheet-fed printing machine downstream of the feeder.
  • the or each device arranged according to the invention for surface modification preferably generates a plasma on the respective one side of a printing material assigned to it. Accordingly, the printing material is not positioned between the electrodes, between which an electrical charge takes place for plasma formation.
  • the plasma generated by means of electrical discharges from air or other gases, such as nitrogen, for example, is conducted by means of overpressure onto the respective surface of the printing material.
  • the feeder is designed as a bulkhead feeder and has an investment table on which the printed sheets are transported as shingled stream to a sheet system for alignment and separation of the printed sheets, wherein the means for surface modification in the area of a following on the sheet system Arch transport cylinder is integrated, in which the surface of the sheet to be modified is freely accessible.
  • FIG. 1 shows a detail of a sheet-fed printing machine from the area of the sheet system
  • FIG. 2 shows a first integrated device for surface modification in FIG
  • FIG. 3 shows a detail of the view according to FIG. 2 with a plasma generation device
  • FIG. 4 shows a representation of a plasma generation system for the device according to the invention according to a second design
  • Fig. 5 a first arrangement according to the invention within a sheet-processing printing machine
  • FIG. 1 shows a schematized section of a sheet-fed printing press in the area of a sheet feeder 10.
  • printed sheets are provided which are held in a sheet feeder in the form of a stack, isolated and via a feed table 11 to a first printing unit of the sheet-fed press fed.
  • the sheet feeder 10 is connected to a shingled feeder, which means that in the area of the feed table 11 printed sheets 12 are transported with overlapping as a shingled stream.
  • Fig. 1 shows schematically two mutually partially overlapping printed sheets 12 of a scale flow.
  • An orientation of the separated printed sheets 12 on alignment marks, not shown, and a sheet feed of the printed sheets 12 with a pre-gripper 14 take place on the end of the feed table 11 seen in the transport direction (arrow 13) of the printed sheet 12.
  • the pre-gripper 14 detects a previously aligned one Sheet 12 at its forward in the transport direction section, this pulls from the investment table 11 and passes it to a first cylinder 15 of the Press.
  • this first cylinder 15 is designed in the manner of a so-called conditioning drum.
  • the configuration shown in Figure 1 can also be carried out within a so-called investor-investment module.
  • a sheetfed printing machine feeder bulkhead
  • the devices for sheet supply to the sheet-fed press which were executed as a sheet feeder 10
  • the arrangement according to the invention can also be used.
  • a device 16 for surface modification of the printing sheet 12 to be printed is integrated in the area of the sheet feeder 10 of the sheet-fed printing machine.
  • the surface modification device 16 in the sheet feeder 10 is arranged in the region in front of the so-called pre-gripper 14, where an alignment of the printed sheet 12 separated by a stack takes place before being fed to the sheet-fed printing press. There, the printed sheet to be processed is exposed so that its surface is completely accessible. Thus, the printing sheets 12 may be subjected to a surface modification over their entire surface.
  • the device 16 for surface modification of the substrates 12 by means of a plasma is preferably designed as shown in FIG. 4.
  • the device 16 of FIG. 4 has a plurality of electrodes, which are grouped in two successive rows 17 and 18, respectively. Within each of these two rows 17 and 18, four electrodes are arranged in a common housing 19 in the illustrated embodiment, with nozzles 20 of the housing 19 forming counterelectrodes for electrical discharge within the device 16.
  • the number of rows and the associated number of electrodes per row are listed here purely by way of example.
  • the device 16 is mounted on a cross member 26 according to FIG. 1.
  • the nozzles 20 and the electrodes, not shown, of the two rows 17 and 18 are aligned with each other in such a way that in the middle between two adjacent electrodes or nozzles 20 of a row an electrode or nozzle 20 of an adjacent row is positioned.
  • an array of electrodes or nozzles 20 is formed by means of which the printing materials 12 can be uniformly subjected to a surface modification in the region of their surface.
  • the electrical discharge required for plasma formation takes place within the housings 19, the plasma formed in this case being formed by means of a carrier gas flowing out under excess pressure, e.g. Compressed air 21, is passed through the nozzles 20 in the direction of the sheet to be treated 12.
  • a carrier gas flowing out under excess pressure e.g. Compressed air 21
  • the housing 19 of the two rows 17 and 18 compressed air connections 21 engage the housing 19 of the two rows 17 and 18 compressed air connections 21 to initiate the compressed air 21 into the housing 19 and so lead out the plasma formed during the discharge together with overpressure on the nozzles 20 out of the housing 19 and in the direction of the sheet 12th to promote.
  • the nozzles 20 are preferably designed as slit nozzles and have seen in cross section parallel to the conveying plane and transverse to the direction of movement of the sheet 12 over a larger dimension than in the direction of movement of the sheet to be treated 12. This allows a particularly uniform treatment of the sheet 12 can be realized.
  • FIGS. 2 and 3 show a device 22 for the surface modification of printing substrates, wherein electrical discharges take place between in each case two outer electrodes 23 (see FIG. 3). Between the electrodes 23, a plasma 24 is formed, which is supplied with air under an overpressure as compressed air 25 to a surface of the treated Sheet 12 can be addressed.
  • the compressed air 25 absorbs the charge carriers desired for the surface modification and distributes them over the surface of the printed sheet 12 to be treated.
  • assemblies of the printing press located in the region of the device 22 must be coated to avoid the risk of short circuits due to discharge sparks jumping from the electrodes to avoid.
  • the devices 16 and 22 for surface modification of printed sheets are arranged in the contact region of the sheet-fed printing press by means of a holder (here for example a cross-member 26). At this point, they can be pivoted into a working position above the sheet path.
  • the devices 16 and 22 can also be designed to be pivotable away from the abutment area on the traverse 26 or with the crossbar 26.
  • the units 16, 22 integrated in the contact area of the sheet-fed printing machine for surface modification of printed sheets can finally be covered by a corresponding protection 27.
  • a corresponding protection 27 By means of the Verschut- 27 can be made possible by means of a suction unit 31, the removal of the resulting warm process gases by means of a negative pressure. This avoids environmental pollution on site and undue heating of the units 16 or 22 by the working process can be prevented.
  • a device 16 for surface modification is positioned in the area of the sheet feeder 10, by means of which the printed sheets 12 can be treated in the region of an upper side or surface with respect to the transport plane.
  • a device 16 for surface modification on both sides of the printing material.
  • a second device for heatmo- 1 be positioned below the alignment of the sheet system 10 or below the cylinder 15 and thus take over the surface modification of the substrate in the region of the second side.
  • the second surface modification device in the area of a sheet turning device can be integrated into the printing machine.
  • the second device for surface modification is preferably arranged in the region after the application of the sheet, where the printed sheet 12 is everted and thus its second side is upwards. Then the device 16 for surface modification above the transport plane of the sheet path can be assigned.
  • a third device for surface modification can be integrated in front of a coating unit in the sheet-fed press.
  • the device for surface modification is also possible to integrate the device for surface modification exclusively in the area of a sheet turn in the sheet-fed press. This is advantageous if one-sided coated printing sheets are used, which should initially print from the uncoated side and after the sheet application of the coated side.
  • the device for surface modification can be integrated exclusively in front of a coating unit in the sheet-fed press. This is advantageous if the already printed surface of the printed sheets for a final finishing treatment, e.g. by applying a glossy or protective coating to be modified.
  • the devices 16, 22 for surface modification units are used, in which the electrical discharge is not carried out through the substrate.
  • electrodes and counter electrodes between which each electrical discharges take place, positioned on the same side of the sheet to be treated.
  • the devices 16, 22 in this case have a distance of between 5 mm and 10 mm from the respective surface of the printed sheets.
  • the arrangement further features.
  • the means 16 or 22 for modifying the surface of printed sheets is either provided with its own control in addition to the power supply or may be coupled to the machine control in such a way that it is adaptable in its behavior to the printing process.
  • at least one point in time or duration or even the time and duration of the plasma generation at the device 16 or 22 can be adjustable.
  • the settings may also be tunable with respect to the power stroke of the sheetfed press.
  • the means 16 or 22 for generating the plasma used in the modification of the printing sheet surface can therefore also be limited in an efficient manner to the time during the feeding of a printed sheet into the sheet-fed printing press. This prevents charges from being scattered uncontrollably into the printing machine or into the sheet feeder 10.
  • the surface modification by means of the device 16, 22 done so that areas of the substrate surface are recessed both transversely and longitudinally to the feed direction. This is due to the described design of the device 16 from a series of discharge units.
  • the amount of plasma generation may be adjustable to provide, in relation to the desired pressure conditions, the necessary amount of free radicals in an adaptable plasma for e.g. to achieve different adjustments of surface tensions in the modification of the surface of the printed sheets.
  • the power of the discharge units is variably controlled, so that the amount of reactive plasma gas can be influenced in a targeted manner.
  • the strength of the surface modification of printed sheets by the plasma on the respective substrate is adjustable. This results in differences between different substrates, as they react differently with the free radicals from the plasma. This reaction may also be variable for inherently similar materials due to variable manufacturing processes, transportation and storage conditions. Therefore, the strength of the surface modification is specifically influenced, with the main influence variable being the strength of the Plasma is. However, the duration of the plasma action, the type of gas used and the pressure of the blast air flow at the nozzles also have an effect.
  • the strength of the surface modification of the printed sheets can also be adapted to the transport speed of the printed sheets by means of the controller.
  • the strength of the plasma can be increased, so that even in a shorter time always the same amount of reactive plasma gas is available.
  • the overpressure for impressing the plasma gas on the printing material can be raised.
  • a device 16 for generating a plasma is assigned to a printing cylinder 30 of a sheet-guiding module and thus creates a device designed as a treatment module 29 in combination with a sheet-fed printing press.
  • the treatment module 29 is arranged between the sheet system 10 and a first printing unit 40. Instead of the first printing unit 40 and a coating unit can be provided.
  • the printed sheets 12 are guided to execute further processing via the impression cylinder 30 of the treatment module 29 and sheet transport drums 28 by printing units 40, 50 following the treatment module 29.
  • Such a treatment module 29 can also be arranged in combination with a paint module or a differently configured unit for the treatment (such as embossing, creasing, cutting) of printing substrates in the inline process.
  • a treatment module 29 may also be connected upstream of a sheet-fed printing press which is configured completely as a varnishing machine, in which case corresponding downstream subordinate flexods are provided in connection with the treatment module 29.
  • an embossing station may also be arranged upstream of the treatment module 29.
  • the printing sheet 12 projects there on the printing cylinder 30 as a single sheet.
  • a full-surface treatment of the sheet surface can be made while the printed sheets 12 are held on the printing cylinder 30 and guided smoothly.
  • the printing cylinder 30 itself is not provided here with a discharge generating counter electrode.
  • metal-coated or metal-coated substrates can also be pretreated with the plasma system described here.
  • the so-designed devices 16, 22 for surface modification can therefore be used for substrates of all currently known types of substrates.
  • the surface modification by means of a discharge on substrates made of substrates with metallic surfaces is also possible.
  • film, paper or board substrates with metallic lamination come into question, such as aluminum-backed substrates.
  • the treatment module 29 Due to the configuration of the treatment module 29, there is sufficient installation space for the energy supply and ozone extraction by means of a suction device 31. Thus, the thermal load of the space environment compared to the arrangement in the sheet system 10 of FIG. 1 is better controlled.
  • the device 16 for surface modification can be moved up or down when not in use. This can be done by moving the whole unit or only the electrodes.
  • the treatment module 29 may be provided with a sheet guide 35 over the treatment cylinder (impression cylinder 30).
  • the device described is used for inline printing and / or coating processes in offset printing units and / or flexo coating units or modules.
  • the plasma method for surface modification is preferably carried out in a first work station with integrated sheet system and upstream sheet feeder.
  • FIG. 6 shows a plasma treatment in a multifunctional module 32 which serves to utilize additional processing functions.
  • the sheet guide for the sheet can be touching and / or non-contact, as something air-assisted done.
  • rollers, cylinders, movable hold-down rod (about in the sheet inlet in the sheet-fed press) can be used.
  • the guide elements can also within the treatment module 29 or the multifunction module 32; be arranged before or after the device 16, 22.
  • the device 16, 22 movably clocking with respect to the surface of the guided on the impression cylinder 30 sheet 12 may be arranged.
  • the energy supply and removal, as well as a suction device 31 for gases produced during the process can be integrated both in the treatment module 29 and in the multifunction module 32.
  • the counter-cylinder 30 is preferably provided as a solid cylinder with a finished surface or exchangeable surfaces such as with ceramic-coated jackets (coated sheets) or finished sheets on a support, for example in the manner of a skewer drum with sheet guide plates. In case of wear by thermal abrasion, so the metal jacket can be easily replaced. To this Purpose are provided on the impression cylinder 30 integrated recording and clamping systems.
  • the unit for plasma treatment is designed as a multifunctional module 32.
  • the multifunction module 32 is provided with changing systems for the use of other additional processing functions.
  • devices for moving or pivoting or removing the device 16, 22 for surface modification by plasma generation are arranged for this purpose.
  • a stamping cylinder 33 can be used in the multifunction module 32 or equipped with stamping tools.
  • an ink-jet printing system 34 can be used in the multifunction module.
  • the additional devices can be accommodated together in the multifunction module 32 and arranged displaceably for common or alternative use with respect to the effective surface on the impression cylinder 30.
  • the multifunction module 32 can also be used alternatively by means of changing equipment or for dual equipping with the said or other working devices for other tasks.
  • both the printing material and the film to be applied can be treated with a plasma method via an associated device corresponding to the device 16, 22 for surface modification, both devices can cooperate or individual devices can be used, the associated supply units can be combined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Ink Jet (AREA)
  • Plasma Technology (AREA)
  • Printing Methods (AREA)

Abstract

L'invention concerne une presse, avec un agencement de feuilles (10) pour les feuilles à imprimer, avec au moins un travail d'impression pour imprimer les feuilles d'impression, avec un balancier servant à extraire les feuilles imprimées et avec au moins un module (16, 22) de modification de surface pour chaque surface des feuilles d'impression, pour augmenter la tension de surface des feuilles d'impression et ainsi augmenter la mouillabilité de ces dernières avec de l'encre d'imprimerie. Selon l'invention, l'un des modules (16, 22) ou les deux pour la modification de surface est/sont intégré(s) à proximité d'un module de traitement plasma (29) subordonné à l'alimentation en feuilles dans la presse.
PCT/EP2008/006270 2007-08-09 2008-07-30 Traitement par plasma par compression WO2009018951A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT08785216T ATE517746T1 (de) 2007-08-09 2008-07-30 Plasmabehandlung beim drucken
EP08785216A EP2178704B1 (fr) 2007-08-09 2008-07-30 Traitement par plasma par compression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007037718.7 2007-08-09
DE102007037718 2007-08-09

Publications (2)

Publication Number Publication Date
WO2009018951A2 true WO2009018951A2 (fr) 2009-02-12
WO2009018951A3 WO2009018951A3 (fr) 2009-04-23

Family

ID=40227126

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/006270 WO2009018951A2 (fr) 2007-08-09 2008-07-30 Traitement par plasma par compression

Country Status (4)

Country Link
EP (1) EP2178704B1 (fr)
AT (1) ATE517746T1 (fr)
DE (1) DE102008035484A1 (fr)
WO (1) WO2009018951A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013178675A1 (fr) * 2012-05-29 2013-12-05 manroland sheetfed GmbH Dispositif d'impression supplémentaire dans une presse à feuilles

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009016360A1 (de) 2009-04-07 2010-10-14 Steinemann Technology Ag Hochleistungsoberflächenbehandlungsvorrichtung
DE102009049210B4 (de) * 2009-10-13 2011-09-01 Steinemann Technology Ag Tintenstrahldrucker und Verfahren zum Betreiben eines solchen Tintenstrahldruckers

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20006513U1 (de) * 2000-04-08 2000-07-13 MAN Roland Druckmaschinen AG, 63075 Offenbach Bogen-Rotationsdruckmaschine
EP1108537A2 (fr) * 1999-12-01 2001-06-20 Koenig & Bauer Aktiengesellschaft Procédé et dispositif pour traiter la surface des supports à imprimer dans machines à imprimer
WO2002016136A1 (fr) * 2000-08-25 2002-02-28 Man Roland Druckmaschinen Ag Procede et dispositif pour le couchage de produits imprimes
DE10232255A1 (de) * 2002-07-17 2004-02-05 Koenig & Bauer Ag Rotationsdruckmaschine
DE202004008285U1 (de) * 2004-05-24 2004-09-02 Tigres Dr. Gerstenberg Gmbh Atmosphärendruck-Plasma-Behandlungswerkzeug für breite Werkstücke
DE102005011571A1 (de) * 2004-04-13 2005-11-17 Man Roland Druckmaschinen Ag Prägeeinrichtung für Wellpappe in einer Bogendruckmaschine
EP1693198A2 (fr) * 2005-02-18 2006-08-23 MAN Roland Druckmaschinen AG Machine d'impression de feuilles
WO2007073833A1 (fr) * 2005-12-27 2007-07-05 Manroland Ag Revetement en relief pouvant etre surimprime

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1108537A2 (fr) * 1999-12-01 2001-06-20 Koenig & Bauer Aktiengesellschaft Procédé et dispositif pour traiter la surface des supports à imprimer dans machines à imprimer
DE20006513U1 (de) * 2000-04-08 2000-07-13 MAN Roland Druckmaschinen AG, 63075 Offenbach Bogen-Rotationsdruckmaschine
WO2002016136A1 (fr) * 2000-08-25 2002-02-28 Man Roland Druckmaschinen Ag Procede et dispositif pour le couchage de produits imprimes
DE10232255A1 (de) * 2002-07-17 2004-02-05 Koenig & Bauer Ag Rotationsdruckmaschine
DE102005011571A1 (de) * 2004-04-13 2005-11-17 Man Roland Druckmaschinen Ag Prägeeinrichtung für Wellpappe in einer Bogendruckmaschine
DE202004008285U1 (de) * 2004-05-24 2004-09-02 Tigres Dr. Gerstenberg Gmbh Atmosphärendruck-Plasma-Behandlungswerkzeug für breite Werkstücke
EP1693198A2 (fr) * 2005-02-18 2006-08-23 MAN Roland Druckmaschinen AG Machine d'impression de feuilles
WO2007073833A1 (fr) * 2005-12-27 2007-07-05 Manroland Ag Revetement en relief pouvant etre surimprime

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013178675A1 (fr) * 2012-05-29 2013-12-05 manroland sheetfed GmbH Dispositif d'impression supplémentaire dans une presse à feuilles

Also Published As

Publication number Publication date
WO2009018951A3 (fr) 2009-04-23
ATE517746T1 (de) 2011-08-15
DE102008035484A1 (de) 2009-02-12
EP2178704A2 (fr) 2010-04-28
EP2178704B1 (fr) 2011-07-27

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