EP0480229B1 - Verfahren zur Herstellung einer Oberflächenstruktur an Druckwerkszylindern für Offsetdruckmaschinen - Google Patents

Verfahren zur Herstellung einer Oberflächenstruktur an Druckwerkszylindern für Offsetdruckmaschinen Download PDF

Info

Publication number
EP0480229B1
EP0480229B1 EP91116182A EP91116182A EP0480229B1 EP 0480229 B1 EP0480229 B1 EP 0480229B1 EP 91116182 A EP91116182 A EP 91116182A EP 91116182 A EP91116182 A EP 91116182A EP 0480229 B1 EP0480229 B1 EP 0480229B1
Authority
EP
European Patent Office
Prior art keywords
negative resist
printing unit
unit cylinder
alkali
layer
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.)
Expired - Lifetime
Application number
EP91116182A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0480229A3 (en
EP0480229A2 (de
Inventor
Werner Dr. Sondergeld
Gerhard Hackelbörger
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 AG
Original Assignee
MAN Roland 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0480229A2 publication Critical patent/EP0480229A2/de
Publication of EP0480229A3 publication Critical patent/EP0480229A3/de
Application granted granted Critical
Publication of EP0480229B1 publication Critical patent/EP0480229B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces

Definitions

  • the invention relates to a method for producing a surface structure on hard metal, galvanically coated, ground metallic material surfaces on printing unit cylinders for offset printing machines.
  • Thick hard chrome coatings e.g. Printing unit cylinders for offset printing presses made of steel or cast iron according to a galvanic process are generally common in order to make the surface of the printing unit cylinder wear-resistant and to protect them against corrosion (see e.g. DE-OS 2 602 277).
  • the application of the thick hard chrome coating in a chrome plating device is usually followed by machining by grinding in order to ensure dimensional and shape accuracy, but without being able to achieve a desired surface structure of the hard chrome layer.
  • the object of the invention is to provide a method which makes it possible to structure a polished metallic material surface of a printing unit cylinder for offset printing presses which is galvanically coated with hard chrome.
  • a printing unit cylinder 1 is provided with an approximately 150 ⁇ m thick wear and corrosion-resistant hard chrome coating 2, which, according to FIG. 1, has a relief or a structure 3 on average, which consists of cup-like depressions 4 which are located directly between mesh-like elevations 5 (webs) are made in the thick hard chrome coating 2 of the printing unit cylinder 1.
  • the method according to the invention is based on a printing unit cylinder 1 which is hard chrome-plated in a known manner in a chrome bath (not shown), preferably to a thickness of 150 ⁇ m and subsequently ground to dimensional and shape accuracy.
  • a layer of an alkali-resistant negative resist material is first applied in a thin layer to the polished hard chrome surface of the printing unit cylinder 1.
  • This is to be understood as a resist material which is chemically resistant and electrically well insulating against strong bases, for example sodium hydroxide solution, and which hardens after exposure to ultraviolet rays. It has been found that such properties have special coatings for electronics, which are based on novolak-epoxy photopolymers. For example, it is a two-component solder resist that is photosensitive and is applied using a spray painting process.
  • a positive grid film is then brought into contact with one of the alkali-resistant negative resist materials listed above in a second process step.
  • a positive screen is understood to mean a screen which has opaque island-like partial areas (dots, squares, wrinkled beads or the like) and which surrounds transparent areas as a network, as is the case with the rotogravure network screen.
  • the printing group cylinder 1 coated with the alkali-resistant negative resist material is now exposed to the effect of an ultraviolet light source under the positive screen film, light penetrating through the transparent parts of the film curing partial areas of the negative resist layer to form a network.
  • Suitable copying machines are used to transfer the mechanically added (repetitive copying machine) or also manually assembled Film on the printing unit cylinder 1, which was previously light-sensitive and coated with an alkali-resistant negative resist.
  • the non-irradiated parts of the alkali-resistant negative resist layer that is, the dots, squares, or the like, are removed between the network with the organic solvent developer provided by the manufacturer of the alkali-resistant negative resist material, so that the holes are removed from the alkali-resistant negative resist material the electrically conductive material surface made of hard chrome of the printing unit cylinder 1 is exposed.
  • the alkali-resistant negative resist layer hardened by the ultraviolet light thus initially remains as a contact mask on the hard chrome coating 2, while unexposed gaps in the network of the mask remain as openings.
  • the island-like exposed hard chromium material can be deepened electrolytically by means of caustic soda by switching the printing cylinder 1 as an anode and spraying the caustic soda through a narrow iron screen cathode arranged along the entire axis at a distance of approx. 4mm from the material surface of the printing cylinder 1.
  • This procedure is based on the knowledge that slow etching processes can be accelerated by electrolysis (see FIG. 4).
  • the chromium ions migrate under the influence of the electric field from the anodically switched material surface of the printing unit cylinder 1 to the cathode 6.
  • the base material of the printing unit cylinder 1 is made of cast iron or steel This electrolyte is not attacked because, unlike chromium, a protective hydroxide layer forms on iron materials when strong sodium hydroxide solution acts.
  • the current densities must have values of approx. 500 amperes per decimeter square, based on the total area, i.e. surfaces of the printing unit cylinder that are covered by photoresist as well as bare surfaces 1. In this way, clean and smooth cells can be achieved without widening pores and micro-cracks in the chrome.
  • the high current density ensures a reasonable processing time so that the temporal alkali resistance of the negative resist material is not exceeded.
  • the total current requirement is between 1000 and 5000 amperes per cylinder, the etching time for a cylinder diameter of 450mm is, for example, 10 to 80 minutes depending on the current flow.
  • the process temperature of the electrolyte must be kept at 20 to 30 ° C. Higher temperatures lead to faster detachment of the alkali-resistant negative resist material, lower temperatures prolong the etching time, which is also disadvantageous for the resistance of the resist over time. It is advisable to choose a larger electrolyte volume to stabilize the temperature or to install additional cooling.
  • the volume throughput of the electrolyte is set to approx. 200 1 / min when using a cathode area of 18 x 1400 mm.
  • the negative resist material must be removed, which is the case with the materials listed above, e.g. can be done by mechanical grinding.
  • the devices for performing the method are partly commercially available and are explained in more detail below with some special features.
  • 2 shows the machine diagram schematically.
  • the cathode 6 is designed as a hollow iron sieve cathode 9 (see FIGS. 2 and 5).
  • the actual shielded processing device 8 has options for accommodating the hollow cathode 9 and the workpiece that carries the contact mask Printing unit cylinder 1.
  • the printing unit cylinder 1 is rotated very slowly during the entire etching process from the start of printing to the end of printing (only one revolution) by means of a drive, with current being supplied via the journal of the printing unit cylinder 1.
  • the zone-by-zone contact with the caustic soda protects the negative resist from the alkali.
  • the printing unit cylinder 1 is not immersed in the sodium hydroxide electrolyte, but is only in contact with the electrolyte in the narrow etching zone.
  • the protective effect of the negative resist is optimally preserved.
  • the hollow iron screen cathode 9 consists of an iron tube, which is arranged below the printing unit cylinder 1 on support brackets 12 and is provided with a flattened face into which nozzles 10 are introduced, which are provided in the axial direction of the printing unit cylinder 1 over its entire width.
  • 3 shows a detail in the view from above of the hollow iron cathode 9.
  • the nozzles 10 make it possible to continuously spray the sodium hydroxide solution in the narrow zone along the printing unit cylinder 1 by means of pumps 11.
  • the zone width is 15-50mm and must not be chosen too large so that the used electrolyte loaded with gas bubbles can be removed as quickly as possible. Additional drainage channels are required for larger cathode widths.
  • the distance of the iron screen hollow cathode 9 from the surface of the printing unit cylinder 1 is approximately 4 mm, with a volume throughput of approximately 200 liters. a closed film of the electrolyte forms per minute on a cylinder length of about 1400 mm.
  • the advantage of zone-by-zone contact with caustic soda is that the caustic soda has a low load on the negative resist material, so that the protective effect of the hardened part of the caustic negative is optimally maintained.
  • the flushing through the hollow iron cathode 9 ensures, even at high current densities, that in the area between the hollow cathode 9 and the printing cylinder 1, in which the electrical power is converted, there is no impermissibly high heating.
  • Plastic strips 16 laterally limit the contact zone of the electrolyte with the printing unit cylinder 1 and form a storage space.
  • a gap nozzle is optionally also suitable, which extends along the printing unit cylinder 1 in the narrow area. 10 to 20% sodium hydroxide solution is preferably used.
  • the DC voltage required for electrolysis is supplied by a generator 15, which consists of a transformer for reducing the mains voltage to approximately 10 volts and a rectifier.
  • the generator 15 must have a short-circuit detection and a current shutdown which, in the event of a process failure which cannot always be avoided, e.g. prevent short circuit damage to the cathode and cylinder due to unfavorable electrolyte flows.
  • the electrolyte supply and its electrolyte preparation consist of an electrolyte pump 11, one or more electrolyte containers 7 and a heat exchanger (not shown in the drawing) for regulating the temperature of the electrolyte.
  • the system must also be shielded to protect the operating personnel from damage to health, e.g. with dangerous vapors.
  • the relevant regulations from the relevant VDE apply to the equipment of the electrical systems, in particular with regard to protection against accidental contact.
  • the advantage of the invention is that a grain screening structure of 20 to 60 lines per cm, for example 20-80 microns deep, which is effective against dulling, directly in an approximately 150 microns thick hard chrome coating of a printing unit cylinder 1 after can produce electrolytic etching method, similar to a gravure cylinder etching, which was previously not possible.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • ing And Chemical Polishing (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Methods (AREA)
  • Ink Jet (AREA)
  • Soil Working Implements (AREA)
  • Screen Printers (AREA)
  • Manufacturing Of Printed Wiring (AREA)
EP91116182A 1990-10-08 1991-09-24 Verfahren zur Herstellung einer Oberflächenstruktur an Druckwerkszylindern für Offsetdruckmaschinen Expired - Lifetime EP0480229B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4031860A DE4031860A1 (de) 1990-10-08 1990-10-08 Verfahren zur herstellung einer oberflaechenstruktur auf druckwerkszylindern fuer offsetdruckmaschinen
DE4031860 1990-10-08

Publications (3)

Publication Number Publication Date
EP0480229A2 EP0480229A2 (de) 1992-04-15
EP0480229A3 EP0480229A3 (en) 1992-11-25
EP0480229B1 true EP0480229B1 (de) 1997-03-19

Family

ID=6415844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91116182A Expired - Lifetime EP0480229B1 (de) 1990-10-08 1991-09-24 Verfahren zur Herstellung einer Oberflächenstruktur an Druckwerkszylindern für Offsetdruckmaschinen

Country Status (5)

Country Link
US (1) US5147513A (enrdf_load_stackoverflow)
EP (1) EP0480229B1 (enrdf_load_stackoverflow)
JP (1) JPH0657880B2 (enrdf_load_stackoverflow)
AT (1) ATE150554T1 (enrdf_load_stackoverflow)
DE (2) DE4031860A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19515394C1 (de) * 1995-04-26 1996-05-23 Roland Man Druckmasch Verfahren zur Herstellung einer Oberflächenstruktur und dessen Anwendung, vorzugsweise für einen Druckmaschinenzylinder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1800550A1 (de) * 1968-10-02 1970-05-14 Ernst Scheuing Verfahren zur Herstellung von Druckbildern auf Druckwalzen
GB1290907A (enrdf_load_stackoverflow) * 1968-12-24 1972-09-27
DE2602277A1 (de) * 1975-01-27 1976-07-29 Adamovske Strojirny Np Druckmaschinen-zylinder
JPS5462929A (en) * 1977-10-28 1979-05-21 Sumitomo Electric Ind Ltd Surface treating method for aluminum and aluminum alloy
DE3824146A1 (de) * 1988-07-16 1990-02-22 Hoechst Ag Lichthaertbares elastomeres gemisch und daraus erhaltenes aufzeichnungsmaterial fuer die herstellung von flexodruckplatten
DE3842448A1 (de) * 1988-12-16 1990-06-21 Basf Ag Lichtempfindliches aufzeichnungselement

Also Published As

Publication number Publication date
DE4031860A1 (de) 1992-04-09
EP0480229A3 (en) 1992-11-25
DE59108623D1 (de) 1997-04-24
JPH04263099A (ja) 1992-09-18
JPH0657880B2 (ja) 1994-08-03
EP0480229A2 (de) 1992-04-15
DE4031860C2 (enrdf_load_stackoverflow) 1992-07-09
ATE150554T1 (de) 1997-04-15
US5147513A (en) 1992-09-15

Similar Documents

Publication Publication Date Title
DE69608579T2 (de) Elektrolytisches verfahren zur reinigung von elektrisch leitenden oberflächen
DE4447897B4 (de) Verfahren zur Herstellung von Leiterplatten
DE3030815C2 (de) Elektrolytisches Körnungsverfahren
DE2327764B2 (de) Wäßriges Bad zur elektrolytischen Körnung von Aluminium
DE3046757C2 (de) Tiefdruckzylinder
DE2532769A1 (de) Verfahren zur herstellung von vorsensibilisierten lithographischen platten
DE2036139A1 (de) Dunnfümmetallisierungsverfahren fur Mikroschaltungen
DE2422918A1 (de) Elektroplattierte bzw. galvanisierte, eloxierte aluminiumgegenstaende und verfahren und vorrichtung zu ihrer herstellung
DE3046213C2 (enrdf_load_stackoverflow)
DE2723465A1 (de) Maske zum aufbringen eines musters auf ein substrat
DE69016735T2 (de) Verfahren zur Herstellung eines Trägers für eine Druckplatte.
EP0337342A1 (de) Verfahren zum Entschichten von Photolack
EP0390033B1 (de) Verfahren und Vorrichtung zum Aufrauhen eines Trägers für lichtempfindliche Schichten
DE69508019T2 (de) Verfahren zum photolithographischen metallisieren zumindest der innenseiten von löchern die in zusammenhang mit einem auf einer aus elektrisch isolierendem material bestehende platte befindlichen muster aufgebracht sind
EP0480229B1 (de) Verfahren zur Herstellung einer Oberflächenstruktur an Druckwerkszylindern für Offsetdruckmaschinen
DE715515C (de) Verfahren zur anodischen Vorbehandlung zuvor in ueblicher Weise entfetteter Metalloberflaechen
DE2064354C3 (de) Verfahren und Vorrichtung zum kontinuierlichen Vorbehandeln eines insbesondere zur Herstellung von lithographischen Flachdruckplatten dienenden Metallfolienbandes
DE19515394C1 (de) Verfahren zur Herstellung einer Oberflächenstruktur und dessen Anwendung, vorzugsweise für einen Druckmaschinenzylinder
EP0973027B1 (de) Verfahren zum Herstellen einer Elektrode
DE3325316A1 (de) Verfahren und vorrichtung zum metallbeschichten, insbesondere zum verkupfern von zylindrischen koerpern
EP0132549B1 (de) Verfahren und Vorrichtung zur kontinuierlichen einseitigen anodischen Oxidation von Aluminiumbändern und deren Verwendung bei der Herstellung von Offsetdruckplatten
EP0530564A1 (de) Verfahren zur Herstellung von Leiterplatten
EP1070999B1 (de) Verfahren zur Oberflächengestaltung von Uhrwerkteilen
DE10259366A1 (de) Verfahren zur Nachbearbeitung eines Durchgangslochs eines Bauteils
DE102019204979A1 (de) Verfahren zur Herstellung einer Komponente für EUV-Lithographievorrichtungen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19921030

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19960724

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19970319

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19970319

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970319

REF Corresponds to:

Ref document number: 150554

Country of ref document: AT

Date of ref document: 19970415

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM & CO. PATENTANWAELTE

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19970319

REF Corresponds to:

Ref document number: 59108623

Country of ref document: DE

Date of ref document: 19970424

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19970619

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970924

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970930

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: MAN ROLAND DRUCKMASCHINEN A.G.

Effective date: 19970930

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980814

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980821

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990924

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990924

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: MAN ROLAND DRUCKMASCHINEN AG

Free format text: MAN ROLAND DRUCKMASCHINEN AG#POSTFACH 10 12 64#63012 OFFENBACH (DE) -TRANSFER TO- MAN ROLAND DRUCKMASCHINEN AG#POSTFACH 10 12 64#63012 OFFENBACH (DE)

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: MANROLAND AG

Free format text: MAN ROLAND DRUCKMASCHINEN AG#POSTFACH 10 12 64#63012 OFFENBACH (DE) -TRANSFER TO- MANROLAND AG#MUEHLHEIMER STRASSE 341#63075 OFFENBACH (DE)

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080919

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20090923

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100401

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100930

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100930