EP0770479A1 - Lame d'encrier zonale pour une machine d'impression rotative - Google Patents

Lame d'encrier zonale pour une machine d'impression rotative Download PDF

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Publication number
EP0770479A1
EP0770479A1 EP96114210A EP96114210A EP0770479A1 EP 0770479 A1 EP0770479 A1 EP 0770479A1 EP 96114210 A EP96114210 A EP 96114210A EP 96114210 A EP96114210 A EP 96114210A EP 0770479 A1 EP0770479 A1 EP 0770479A1
Authority
EP
European Patent Office
Prior art keywords
color
knife
ink
hard material
color knife
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
EP96114210A
Other languages
German (de)
English (en)
Other versions
EP0770479B1 (fr
Inventor
Joseph Gordon Blackwell
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
Goss International Montataire SA
Original Assignee
Heidelberger Druckmaschinen AG
Heidelberg Harris SA
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, Heidelberg Harris SA filed Critical Heidelberger Druckmaschinen AG
Publication of EP0770479A1 publication Critical patent/EP0770479A1/fr
Application granted granted Critical
Publication of EP0770479B1 publication Critical patent/EP0770479B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2231/00—Inking devices; Recovering printing ink
    • B41P2231/12—Axially segmented ink blades

Definitions

  • the invention relates to an ink knife for a rotary printing press, which can be arranged in the ink fountain of an inking unit of the rotary printing press and serves to strip off printing ink from an ink fountain roller of the inking unit, the free end area of the ink fountain knife to be assigned to the ink fountain roller having a number of slots for zonal division, as a result of which a corresponding number is formed by individual knives.
  • Such color knives are known. They are located within the inking unit of the rotary printing press and serve to provide the smallest possible color film for printing. Due to the zonal division of the ink knife, individual knives are formed, which can be individually adjusted in relation to the ink fountain roller, so that the ink film layer thickness of the individual zone can be specified depending on the subject.
  • An actuator is preferably assigned to each individual knife in order to be able to adjust the gap width of the area between the end of each free end of a single knife and the surface of the ink fountain roller from the control center of the machine.
  • the color film layer thickness of each zone can thus be adapted to the circumstances, with a relatively thin layer thickness often being sought in order to achieve good printing results.
  • the layer thickness is determined on the one hand by the setting of the actuator and on the other hand also by the position of the individual knife in relation to the ink fountain roller.
  • Print quality is not just a matter of setting it up correctly of the respective individual knife, but also requires that the edges of the individual knives cooperating with the ink fountain roller are adapted to the contour of the ink fountain roller, in particular to have a correct alignment with the lateral surface.
  • a correctly set-up individual knife should keep its parameters unchanged for as long as possible.
  • the zonal color meters known from US 3,699,888 and DE 37 07 570 have deficiencies in this regard.
  • the invention is therefore based on the object of providing a colorimeter of the type mentioned at the outset, which brings with it a high degree of reproducibility over a long period of time and also ensures optimum print quality.
  • the contact zones of the individual knives with the ink fountain roller are provided with a hard material coating arranged on a base body of the ink knife.
  • the hard material coating ensures that, on the one hand, there is a surface which is optimally matched to the corresponding outer surface of the ink fountain roller and is essentially resistant to signs of wear. Long operating times are possible without having to carry out readjustments. The reproducibility of the work result is given.
  • the coating allows a particularly thin color layer formation if this thin layer thickness is desired.
  • the main body of the color knife which is preferably designed as a one-piece component, is provided with the hard material coating, although there is a zonal subdivision, i.e.
  • the hard material coating is designed as a ceramic coating.
  • the ceramic coating has titanium dioxide (TiO 2 ).
  • the ceramic coating has Al 2 O 3 .
  • a very good connection to the base body is obtained when the ceramic coating is applied to an intermediate layer which has nickel, in particular in the form of a nickel-chromium intermediate layer, the intermediate layer being located between the base body and the hard material coating.
  • each individual knife is designed as a bevel in the free end area of the color knife.
  • the base body can in particular consist of metal, preferably steel.
  • each slot is formed by a narrow slot starting from the free end of the color knife and an adjoining wide slot.
  • a “narrow slot” is to be understood as a slot with only a very small slot width, while a “wide slot” has a larger slot width.
  • the wide slots are preferably closed with elastic material. The elasticity of this material allows a single knife setting despite the seal, that means a relative movement to the respective neighboring individual knife. There is no sealing measure within the narrow slot by introducing sealing material.
  • the slot width of the narrow slot is preferably selected such that the printing ink does not pass.
  • the hard material coating is preferably only on the upper side of the color knife, but not in the area of the slots, in particular in the area of the narrow slots or the wide slots.
  • Figure 1 shows - in a schematic representation - a color meter 1, which is located within a color box, not shown. Viewed in cross section, the color knife 1 has an approximately trapezoidal shape, that is to say Top 2 and bottom 3 converge towards the free end 4.
  • a bevel 5 is formed, which starts from the end face of the free end 4 and extends to the top 2.
  • the bevel 5 on the top 2 of the ink knife 1 or a part of it forms a contact zone 6 with the outer surface 7 of an ink fountain roller 8 of the inking unit.
  • the top view of FIG. 2 shows that the color knife 1 is designed as a zonal color knife, that is to say it is divided into individual knives 10 by means of several, preferably parallel, spaced slots 9.
  • the slots 9 extend from the free end 4 of the ink knife 1 and extend into the region of a fastening zone 11, which is used to mount the ink knife 1 in the ink fountain. Due to the slots 9, the individual knives 10 are cut free, so that they can be individually adjusted by means of suitable actuators, not shown, that is, the formation of the ink layer thickness can be adjusted zonally.
  • thirty individual knives 10 and thus thirty color zones are provided.
  • FIG. 3 shows that a hard material coating 12 is applied to the top 2 of the color knife 1.
  • This hard material coating 12 is located on the bevel 5 and extends from there over part of the length of the individual knives 10.
  • the color knife 1 preferably has a base body 13 made of steel, which was first hardened and then tempered again, on which at least in the area of the hard material coating 12 - an intermediate layer 14 is applied, which has nickel, is preferably designed as a nickel-chromium intermediate layer. The addition of nickel-chrome improves the Bending properties, as well as the corrosion resistance.
  • the hard material coating 12 is applied to this intermediate layer 14.
  • the bottom 3 of the base body 13 runs in the area facing away from the free end 4 parallel to the top and in the front free end area at an angle ⁇ of 2 ° to 10 °, preferably 5.5 °.
  • the angle ⁇ is formed between the area of the underside 3 running parallel to the upper side 2 and the then inclined surface 15 (FIG. 3).
  • the upper side 2 with the bevel 5 has an angle of 15 ° to 35 °, preferably 25 °. This angle is marked with ⁇ .
  • FIG. 4 illustrates that the slots 9 are composed of two parts, namely a narrow slot 16 starting from the free end 4 and merging into a wide slot 17.
  • the narrow slot 16 has only a very small slot width of preferably 0.03 to 0.06 mm.
  • the wide slot 17 has in particular a slot width of 3 mm and is closed with an elastic material 18.
  • the elastic material is preferably polyurethane or another suitable material. This material prevents paint from running out of the wide slot 17, but guarantees that the individual knives 10 can move.
  • Neither the hard material coating 12 nor the elastic material 18 is located within the narrow slot 16.
  • the hard material coating 12 runs only over a partial area of the upper side 2, and only on the side facing the ink fountain roller 8.
  • the hard material coating 12 ends in the area of the wide slots 17 (reference number 19) and thus covers the area that has the narrow slots 16.
  • the hard material coating 12 is preferably designed as a ceramic coating.
  • the graphic according to FIG. 6 shows the wear of a color meter as a function of the operating time.
  • the hard material coating 12 adapts optimally to the contour of the surface of the ink fountain roller 8. This is done in such a way that no post-processing is necessary, such as when mounting with clamping elements for the ink knife, the clamping forces acting on the ink knife from below.
  • the curve of curve A shows, the wear during the operating time is very low. It can be seen that the color knife can still be used for a long time. Even after approximately 500 hours of operation, the wear on the hard material coating 12 is still moderate.
  • curve C shows the wear of a conventional color meter as a function of the operating time.
  • Curve C shows a significantly higher wear compared to that which the colorimeter 1 according to the present invention experiences, even after only a short use.
  • curve B shows the level of wear up to which conventional colorimeters are generally used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Pens And Brushes (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Rotary Presses (AREA)
  • Adjustable Resistors (AREA)
EP96114210A 1995-10-26 1996-09-05 Lame d'encrier zonale pour une machine d'impression rotative Expired - Lifetime EP0770479B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9512641 1995-10-26
FR9512641A FR2740386B1 (fr) 1995-10-26 1995-10-26 Lame d'encrier subdivisee en zones pour une machine rotative a imprimer

Publications (2)

Publication Number Publication Date
EP0770479A1 true EP0770479A1 (fr) 1997-05-02
EP0770479B1 EP0770479B1 (fr) 1999-12-01

Family

ID=9483943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96114210A Expired - Lifetime EP0770479B1 (fr) 1995-10-26 1996-09-05 Lame d'encrier zonale pour une machine d'impression rotative

Country Status (6)

Country Link
US (1) US5778785A (fr)
EP (1) EP0770479B1 (fr)
JP (1) JP4170406B2 (fr)
AT (1) ATE187123T1 (fr)
DE (2) DE59603775D1 (fr)
FR (1) FR2740386B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1057629A2 (fr) * 1999-06-03 2000-12-06 Mitsubishi Heavy Industries, Ltd. Système d'alimentation en encre et son vis de réglage du débit d'encre

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778365B1 (fr) * 1998-05-11 2000-12-15 Jean Claude Sarda Perfectionnements apportes aux encriers des presses a imprimer et a leur mode de nettoyage
EP1092535A1 (fr) * 1999-10-13 2001-04-18 Think Laboratory Co., Ltd. Racle
US6857366B1 (en) * 1999-11-02 2005-02-22 Erik Nikkanen Printing press ink transfer mechanism and employment of same
US6612238B2 (en) * 2000-04-26 2003-09-02 Heidelberger Druckmaschinen Ag Inking unit in a printing machine
EP1588854A1 (fr) * 2004-04-22 2005-10-26 Kba-Giori S.A. Encrier pour machine d'impression
CN100387775C (zh) * 2006-04-13 2008-05-14 山东科技大学 耐磨型造纸涂布刮刀
CN100432333C (zh) * 2006-05-12 2008-11-12 戴亚洲 一种陶瓷涂层刮刀及其制造方法
CN103481661A (zh) * 2013-09-05 2014-01-01 常熟市董浜镇徐市嘉峰机械厂 一种油墨刮刀结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699888A (en) * 1971-09-13 1972-10-24 North American Rockwell Composite fountain blade construction for remote ink control system
GB2128551A (en) * 1982-10-13 1984-05-02 Inventing Ab Scraper with wear-resistant coating
GB2156276A (en) * 1983-06-13 1985-10-09 Shinohara Machinery Co Ltd Ink discharge regulation blades
WO1986007309A1 (fr) * 1985-06-14 1986-12-18 Uddeholm Strip Steel Aktiebolag Racle resistante a l'usure
DE3707570A1 (de) * 1987-03-10 1988-09-22 Jansen Herfeld Roettger Fa Farbmesser fuer die druckindustrie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2228625B2 (de) * 1972-06-13 1974-07-11 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Farbkasten für Druckmaschinen
FI82094C (fi) * 1989-02-16 1997-09-09 Valmet Corp Anvaendning av en legering av ett metallpulver och en karbid eller nitrid innefattande belaeggningskomposition foer en i en pappersmaskin anvaendbar yankeecylinder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699888A (en) * 1971-09-13 1972-10-24 North American Rockwell Composite fountain blade construction for remote ink control system
GB2128551A (en) * 1982-10-13 1984-05-02 Inventing Ab Scraper with wear-resistant coating
GB2156276A (en) * 1983-06-13 1985-10-09 Shinohara Machinery Co Ltd Ink discharge regulation blades
WO1986007309A1 (fr) * 1985-06-14 1986-12-18 Uddeholm Strip Steel Aktiebolag Racle resistante a l'usure
DE3707570A1 (de) * 1987-03-10 1988-09-22 Jansen Herfeld Roettger Fa Farbmesser fuer die druckindustrie

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1057629A2 (fr) * 1999-06-03 2000-12-06 Mitsubishi Heavy Industries, Ltd. Système d'alimentation en encre et son vis de réglage du débit d'encre
EP1057629A3 (fr) * 1999-06-03 2002-10-16 Mitsubishi Heavy Industries, Ltd. Système d'alimentation en encre et sa vis de réglage du débit d'encre

Also Published As

Publication number Publication date
ATE187123T1 (de) 1999-12-15
DE59603775D1 (de) 2000-01-05
JP4170406B2 (ja) 2008-10-22
FR2740386A1 (fr) 1997-04-30
EP0770479B1 (fr) 1999-12-01
US5778785A (en) 1998-07-14
FR2740386B1 (fr) 1998-01-16
DE19636536A1 (de) 1997-04-30
JPH09164661A (ja) 1997-06-24

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