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EP0908309B1 - Racle d'impression et procédé pour sa fabrication - Google Patents

Racle d'impression et procédé pour sa fabrication Download PDF

Info

Publication number
EP0908309B1
EP0908309B1 EP97117424A EP97117424A EP0908309B1 EP 0908309 B1 EP0908309 B1 EP 0908309B1 EP 97117424 A EP97117424 A EP 97117424A EP 97117424 A EP97117424 A EP 97117424A EP 0908309 B1 EP0908309 B1 EP 0908309B1
Authority
EP
European Patent Office
Prior art keywords
hard material
doctor blade
pvd
layer
facet
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
EP97117424A
Other languages
German (de)
English (en)
Other versions
EP0908309A1 (fr
Inventor
Rolf Meyer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT97117424T priority Critical patent/ATE220992T1/de
Priority to ES97117424T priority patent/ES2179988T3/es
Priority to DE59707796T priority patent/DE59707796D1/de
Priority to EP97117424A priority patent/EP0908309B1/fr
Publication of EP0908309A1 publication Critical patent/EP0908309A1/fr
Application granted granted Critical
Publication of EP0908309B1 publication Critical patent/EP0908309B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/06—Details
    • B41F9/08—Wiping mechanisms
    • B41F9/10—Doctors, scrapers, or like devices
    • B41F9/1072—Blade construction

Definitions

  • the invention relates to a method for equipping a Printing squeegee with a hard material layer and one after it Processed squeegees.
  • the invention avoids this disadvantage in that the squeegee an electrochemical before applying the hard material Material removal process is subjected.
  • the coating can be done in a conventional manner. in the PVD processes are by sputtering or in the arc process Atoms or particles detached from a target and in Plasma is transported to the surface to be treated. At the The layer deposition takes place via the PA-CVD process Plasma excitation of a hydrocarbon-containing gas.
  • the Power can be fed in on the substrate holder. there temperatures are expediently used which ensure that the doctor blade body to be coated is at a temperature below the damage temperature and in any case remains below about 250 ° C. It is achieved that also temperature sensitive Doctor blade body coated according to the invention steel, for example, in terms of its tempering temperature or polymeric materials.
  • the hard material it is preferably DLC (diamond-like carbon), a carbon layer or carbon-rich layer, the z. T. essential is characterized by diamond crystal structures and appropriate abrasion resistance and good sliding properties having. But it can also be other hard materials or Mixtures of DLC with other substances, especially metal, act. It is achieved in such a way that the claimed areas of the Doctor blade with increased wear resistance and good Gliding properties are equipped.
  • DLC diamond-like carbon
  • the z. T. essential is characterized by diamond crystal structures and appropriate abrasion resistance and good sliding properties having.
  • it can also be other hard materials or Mixtures of DLC with other substances, especially metal, act. It is achieved in such a way that the claimed areas of the Doctor blade with increased wear resistance and good Gliding properties are equipped.
  • the hard material is expediently applied in a smooth layer. This is done by sputtering the target and thus the coating material in atomic fineness is delivered by the target and to the one to be treated Surface.
  • a less smooth, microscopic wavy, matt-appearing Coating is obtained using the so-called arc process or a similar method in which the Coating particles not in atoms, but in larger ones Dress the target towards the surface to be treated leave.
  • the properties of the smooth layer often the wavy or matt layer can be higher in some Cases should be preferred because they are particularly low Dimensions tends to break out and also due to their microwave enables a hydrodynamic lubrication effect.
  • a pressure doctor blade is generated by the method according to the invention, whose body is made of hardened and tempered below 300 ° C Steel is made and at least the facet and / or a side surface adjacent to the facet with a hard material layer applied in the PVD process.
  • the following process parameters are generated in this chamber.
  • chromium is atomized in an atmosphere of argon and a hydrocarbon gas such as C 2 H 6 , C 2 H 2 or C 2 H 4 .
  • the chrome targets are atomized via a DC power supply of approx. 1500W. This low power is required to keep the temperature of the parts to be coated below 200 ° C.
  • a DC voltage or high-frequency voltage (13.56 MHz) of approx. -100V is also applied to the parts to be coated.
  • This potential difference between the substrate holder and the surrounding walls leads to the bombardment of the substrates or the chromium atoms with argon and hydrocarbon ions, so that the layer material is compressed.
  • a support layer is produced, the thickness of which is between 1 and 10 ⁇ m, preferably between 2 and 4 ⁇ m, and which follows the surface shape of the substrate microscopically smoothly. With less pressure on the forme cylinder than is usually used, this results in excellent printing results and an unusually long service life.
  • a DC or RF power of approx. 1000W and a corresponding voltage of approx. 110V are applied to the substrate holder.
  • a discharge pressure of approx. 400 mPa and a gas ratio of argon / hydrocarbon (C 2 H 2 ) of approx. 1 a plasma burns, which leads to the deposition of hard DLC layers.
  • the targets themselves are switched off in this process, so that a purely plasma-assisted CVD deposition is present.
  • a small power feed (approx. 300W) can also be made via the chrome targets.
  • chromium nitride titanium nitride, Titanium carbonitride, titanium aluminum nitride, chromium carbide, Titanium hafnium nitride, titanium boride or titanium boron carbide and the like and mixtures of such substances with each other or with third substances, metals, in question.
  • the layer should be selected to work in conjunction with the Document or one between the documents if necessary and the separating layer provided for the coating are not susceptible to corrosion is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physical Vapour Deposition (AREA)
  • Chemical Vapour Deposition (AREA)
  • Rotary Presses (AREA)
  • Manufacturing Of Printed Wiring (AREA)

Claims (6)

  1. Procédé pour équiper une racle d'impression d'un revêtement en matériau dur par un procédé PVD ou PA-CVD, caractérisé par le fait que la racle est soumise auparavant à un processus de déposition électrochimique de matériau.
  2. Procédé selon la revendication 1, caractérisé par le fait que la température du corps de racle, pendant le déroulement du procédé PVD ou PA-CVD, reste inférieure à 250°C.
  3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que le matériau dur est rapporté en couche lisse.
  4. Procédé selon la revendication 1 ou 2, caractérisé par le fait que le matériau dur est rapporté en couche ondulée ou mate.
  5. Procédé selon l'une des revendications 1 à 4 , caractérisé par le fait que le matériau dur est constitué pour une part important de DLC.
  6. Racle d'impression dont la facette et/ou l'une des surfaces latérales voisines de la facette est pourvue d'une couche de matériau dur rapportée par un procédé PVD ou PA-CVD, caractérisé par le fait qu'elle est constituée d'un corps en acier trempé et revenu au-dessous de 300°C et que sa surface située au-dessous de la couche de matériau dur est soumise à un processus de déposition électrochimique.
EP97117424A 1997-10-08 1997-10-08 Racle d'impression et procédé pour sa fabrication Expired - Lifetime EP0908309B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT97117424T ATE220992T1 (de) 1997-10-08 1997-10-08 Druckrakel und verfahren zur herstellung derselben
ES97117424T ES2179988T3 (es) 1997-10-08 1997-10-08 Rasqueta de impresion y procedimiento para su fabricacion.
DE59707796T DE59707796D1 (de) 1997-10-08 1997-10-08 Druckrakel und Verfahren zur Herstellung derselben
EP97117424A EP0908309B1 (fr) 1997-10-08 1997-10-08 Racle d'impression et procédé pour sa fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97117424A EP0908309B1 (fr) 1997-10-08 1997-10-08 Racle d'impression et procédé pour sa fabrication

Publications (2)

Publication Number Publication Date
EP0908309A1 EP0908309A1 (fr) 1999-04-14
EP0908309B1 true EP0908309B1 (fr) 2002-07-24

Family

ID=8227457

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97117424A Expired - Lifetime EP0908309B1 (fr) 1997-10-08 1997-10-08 Racle d'impression et procédé pour sa fabrication

Country Status (4)

Country Link
EP (1) EP0908309B1 (fr)
AT (1) ATE220992T1 (fr)
DE (1) DE59707796D1 (fr)
ES (1) ES2179988T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1092535A1 (fr) * 1999-10-13 2001-04-18 Think Laboratory Co., Ltd. Racle
DK200000237A (da) 2000-02-15 2001-08-16 Tresu Anlaeg As Bjælke for kammerrakel samt kammerrakel
BE1014623A3 (nl) * 2000-06-17 2004-02-03 Werkwijze voor het vervaardigen van cliche's voor tampondruk met een coating.
GB2448352A (en) * 2007-04-12 2008-10-15 Dek Int Gmbh Wiper blade for a screen printing machine
WO2012128700A1 (fr) * 2011-03-18 2012-09-27 Allan Lunnerfjord Outil en forme de lame et son procédé de fabrication

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997041299A1 (fr) * 1996-05-02 1997-11-06 Btg Eclepens S.A. Lame de crepage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB499463A (en) * 1938-08-08 1939-01-24 Miehle Printing Press & Mfg Improvements relating to doctor blades for gravure-printing presses
DE4024514A1 (de) * 1990-08-02 1992-02-06 Marina Kinkel Rakeln fuer druckmaschinen
JPH04296556A (ja) * 1991-03-26 1992-10-20 Toppan Printing Co Ltd 凹版印刷用ドクタおよびその製造方法
US5638751A (en) * 1994-10-26 1997-06-17 Max Daetwyler Corporation Integrated doctor blade and back-up blade
JPH08197711A (ja) * 1995-01-30 1996-08-06 Toppan Printing Co Ltd ドクター刃
DK0728579T3 (da) * 1995-02-27 1999-03-22 Rolf Meyer Rakel til dybtryk-rotationsmaskiner samt fremgangsmåde og anordning til dens fremstilling

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997041299A1 (fr) * 1996-05-02 1997-11-06 Btg Eclepens S.A. Lame de crepage

Also Published As

Publication number Publication date
ES2179988T3 (es) 2003-02-01
ATE220992T1 (de) 2002-08-15
EP0908309A1 (fr) 1999-04-14
DE59707796D1 (de) 2002-08-29

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