EP0941846A1 - Dispositif d'étanchéité pour une racle à chambre - Google Patents

Dispositif d'étanchéité pour une racle à chambre Download PDF

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Publication number
EP0941846A1
EP0941846A1 EP98104110A EP98104110A EP0941846A1 EP 0941846 A1 EP0941846 A1 EP 0941846A1 EP 98104110 A EP98104110 A EP 98104110A EP 98104110 A EP98104110 A EP 98104110A EP 0941846 A1 EP0941846 A1 EP 0941846A1
Authority
EP
European Patent Office
Prior art keywords
sealing block
seal according
doctor blade
reinforcing bodies
sealing
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.)
Withdrawn
Application number
EP98104110A
Other languages
German (de)
English (en)
Inventor
Manfred Terstegen
Bodo Steinmeister
Wilfried Dr. Ing. Kolbe
Klaus Schirrich
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.)
Fischer and Krecke GmbH and Co KG
Original Assignee
Fischer and Krecke GmbH and Co KG
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 Fischer and Krecke GmbH and Co KG filed Critical Fischer and Krecke GmbH and Co KG
Priority to EP98104110A priority Critical patent/EP0941846A1/fr
Publication of EP0941846A1 publication Critical patent/EP0941846A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B41F31/027—Ink rail devices for inking ink rollers

Definitions

  • the invention relates to a seal for a chambered doctor blade of a printing machine.
  • Printing machines for example flexographic printing machines, have an application roller on that for applying the printing ink to the actual printing cylinder serves and which in turn is colored with the help of a doctor blade.
  • the chambered doctor blade has a housing that extends over the entire length of the Application roller extends, and carries at least two doctor blades that cover the perimeter scrape off the rotating applicator roller and together with the housing the chamber doctor blade and the one between the doctor blades Limit an ink chamber circumferential surface of the application roller.
  • the application roller usually has a regular grid of flat ones on its surface Wells that are filled with ink when the one in question Circumferential portion of the applicator roller moved through the ink chamber, and the then deliver the ink picked up to the impression cylinder.
  • the seals that form the subject of the following invention serve to close the ink chamber at the ends.
  • Conventional seals of this type have a block of flexible Material, for example made of felt, between the two doctor blades is inserted into the chamber of the chamber doctor blade and close to the two doctor blades and on the intermediate portion of the surface of the Application roller is applied.
  • the flexibility of the sealing block enables a good seal on the circumference of the application roller and allows an increasing stronger positioning of the doctor blade on the applicator roller accordingly the progressive wear of the doctor blades.
  • the material of the sealing block must be meet various requirements that have so far not been satisfactory to bring them into harmony. On the one hand, it must be a reliable one and ensure permanent sealing of the ink chamber, on the other hand, should in terms of the frictional contact between the sealing block and the rotating applicator roller have the highest possible abrasion resistance, so that the sealing block does not work off too quickly. About that In addition, the material must be compared to the printing inks and Solvents are chemically and mechanically resistant. The liquids that can come into contact with the surface of the sealing block on the one hand lead to swelling and softening of the material and can, on the other hand, after drying the liquid to a Cause embrittlement of the material. In both cases, there is ultimately one increased wear on the sealing blocks.
  • the object of the invention is to provide a seal for the chamber doctor blade To create printing machine that has a higher wear resistance and a permanent and reliable seal of the ink chamber enables.
  • the abrasion resistance of the seal is considerable due to the reinforcing body increased while on the other hand by the mobility of the reinforcing body the deformability of the sealing material relative to one another remains intact, so that the seal lies well against the surface the application roller and thus a good sealing effect is guaranteed. If with progressive wear of the doctor blade, the chamber doctor blade denser the seals are adjusted accordingly deform. Because the reinforcement body is movable relative to each other build-up of stresses in the surface layer is avoided, leading to a local detachment of the seal from the peripheral surface of the application roller could lead.
  • the reinforcing body can for example be made of metal or from a Plastic with good sliding properties, such as polytetrafluoroethylene. Provided the material of the reinforcement body is harder than the compliant material but the seals are softer than the material in the surface area in question the application roller, the reinforcing body can "Grind in” a little bit while the printing press is running and thereby precisely match the Adjust the curvature of the application roller so that it does not require extensive preprocessing the reinforcing body is a flat contact of the reinforcing body reached on the applicator roller.
  • the reinforcing bodies can be conical, lenticular or platelet-shaped particles that act individually in the matrix of softer Sealing material are embedded. On the surface of the seal the matrix will initially be subject to greater wear than that Reinforcing body until the matrix material is slightly opposite the surface the reinforcement body is behind. That way between the gap formed between the matrix material and the surface of the application roller is so narrow, however, that leakage through capillary action or the like remain negligibly small. Since the applicator roller normally rotates, If the ink chamber is filled with liquid, dynamic Effects still improve the sealing effect.
  • the reinforcing body can also have an elongated shape and are then preferably oriented transversely to the axis of the applicator roller, so that they a particularly effective liquid barrier in the axial direction of the application roller form.
  • the reinforcing bodies can also be articulated together.
  • they can be interlinked Chain links can be formed which are a linear chain or optionally also form a flat structure in the manner of a chain mail.
  • the reinforcing bodies can also be designed as fibers and, for example, form a loosely knitted fiber mat that fits into the matrix is embedded from sealing material.
  • the surface areas abutting the doctor blades are also preferred of the sealing block with reinforcing bodies, so that a complete reinforcement layer is retained even when using progressive wear of the doctor blades on the application roller Enlarged surface section of the seal.
  • the doctor blade 12 has Housing 14 on which in a known manner, for example with the help of shown clamping devices, two roof-shaped doctor blades 16, 18 are attached, with their free ends on the circumference of the applicator roller 10 concerns.
  • the two doctor blades 16, 18 and the section of the Circumferential surface of the application roller 10 is limited to an ink chamber 20 extends over the entire length of the application roller 10 and at both ends is completed by seals 22.
  • FIG 2 one end of the applicator roller 10 and the chamber doctor blade 12 with the corresponding seal 22 shown.
  • the application roller 10 has one Middle section 24 and a narrow end section 26 at each end.
  • the peripheral surface of the applicator roller is one Cup grid made of flat cups 28, while the End portions 26 against which the seals 22 abut a smooth Have surface.
  • the ink chamber 20 is filled with printing ink filled, and the application roller 10 rotates clockwise in Figure 1.
  • the peripheral surface of the applicator roller 10 wetted in the middle section 24 with printing ink.
  • excess ink is stripped off again, so that only a certain amount of ink in the Cup 28 remains, which then to a pressure cylinder, not shown is handed over.
  • the seal 22 has a seal block 30 made of resilient material on, for example made of felt or one compared to printing inks and Solvent resistant soft, rubbery porous or not porous material.
  • the sealing block 30 is in a groove 32 of the housing 14 held and forms one to the doctor blade 16, 18 and between them included circumferential section of the applicator roller 10 adapted contour, so that it completely closes off the ink chamber 20 at the end.
  • the sealing block 30 has in the on the doctor blades 16, 18 and Applicator roller 10 adjacent surface areas a reinforced surface layer 34 on. As can be seen more clearly in FIGS. 3 and 4, this surface layer 34 is formed by individual reinforcing bodies 36, which consist for example of metal and individually in the surrounding matrix are embedded from the material of the sealing block 30.
  • the reinforcing bodies have a flatter shape Plate that is oriented parallel to the surface of the sealing block 30 are, so that most of the surface adjacent to the applicator roller of the sealing block is formed by the reinforcing body 36.
  • the Size of the reinforcement body 36 and the spaces between them is exaggerated in Figures 3 and 4 and can be clear in practice be smaller.
  • the reinforcing body 36 is only a single layer Forming layer, the reinforcing layer 34 can optionally also by several Layers of ordered or disordered reinforcement body formed become.

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  • Rotary Presses (AREA)
EP98104110A 1998-03-07 1998-03-07 Dispositif d'étanchéité pour une racle à chambre Withdrawn EP0941846A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98104110A EP0941846A1 (fr) 1998-03-07 1998-03-07 Dispositif d'étanchéité pour une racle à chambre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98104110A EP0941846A1 (fr) 1998-03-07 1998-03-07 Dispositif d'étanchéité pour une racle à chambre

Publications (1)

Publication Number Publication Date
EP0941846A1 true EP0941846A1 (fr) 1999-09-15

Family

ID=8231552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104110A Withdrawn EP0941846A1 (fr) 1998-03-07 1998-03-07 Dispositif d'étanchéité pour une racle à chambre

Country Status (1)

Country Link
EP (1) EP0941846A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19949103A1 (de) * 1999-10-12 2001-05-10 Kroenert Max Maschf Dichtungsanordnung für eine Druckkammerrakel
DE202012102483U1 (de) 2012-07-05 2012-08-06 MÖLLERING Gummi- und Kunststofftechnik GmbH Kammerrakeldichtung mit Gleitstück
CN103826857A (zh) * 2011-08-11 2014-05-28 丹麦得利速股份公司 用于刮墨刀腔的垫片
DE102013010751A1 (de) * 2013-06-27 2014-12-31 Heidelberger Druckmaschinen Ag Dichtung für Rakeleinrichtungen
EP2930025A1 (fr) * 2014-04-11 2015-10-14 wiguTec Gummitechnologie GmbH & Co. KG Élément d'étanchéité
DE202021102690U1 (de) 2021-05-18 2022-08-22 Möllering Gummi- und Kunststoff-Technik GmbH Dichtelement, Rakelkammer mit einem Dichtelement und Druckmaschine mit einem Dichtelement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1590928A (en) * 1976-12-21 1981-06-10 Grosart J Inking device
US4590855A (en) * 1984-06-18 1986-05-27 Printco Industries, Ltd. Reverse angle doctor blade assembly with stationary end seal
EP0246708A1 (fr) * 1986-05-21 1987-11-25 Stork Screens B.V. Système d'alimentation en encre
EP0438731A2 (fr) * 1990-01-22 1991-07-31 WindmÀ¶ller & Hölscher Dispositif de raclage pour l'encrier à circulation d'encre d'une presse À  imprimer rotative
EP0513480A1 (fr) * 1991-05-15 1992-11-19 Paper Converting Machine Company Dispositif d'encrage pour presse à imprimer et procédé

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1590928A (en) * 1976-12-21 1981-06-10 Grosart J Inking device
US4590855A (en) * 1984-06-18 1986-05-27 Printco Industries, Ltd. Reverse angle doctor blade assembly with stationary end seal
EP0246708A1 (fr) * 1986-05-21 1987-11-25 Stork Screens B.V. Système d'alimentation en encre
EP0438731A2 (fr) * 1990-01-22 1991-07-31 WindmÀ¶ller & Hölscher Dispositif de raclage pour l'encrier à circulation d'encre d'une presse À  imprimer rotative
EP0513480A1 (fr) * 1991-05-15 1992-11-19 Paper Converting Machine Company Dispositif d'encrage pour presse à imprimer et procédé

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19949103A1 (de) * 1999-10-12 2001-05-10 Kroenert Max Maschf Dichtungsanordnung für eine Druckkammerrakel
CN103826857A (zh) * 2011-08-11 2014-05-28 丹麦得利速股份公司 用于刮墨刀腔的垫片
CN103826857B (zh) * 2011-08-11 2015-03-11 丹麦得利速股份公司 用于刮墨刀腔的垫片
US9283744B2 (en) 2011-08-11 2016-03-15 Tresu A/S Gasket for a doctor blade chamber
DE202012102483U1 (de) 2012-07-05 2012-08-06 MÖLLERING Gummi- und Kunststofftechnik GmbH Kammerrakeldichtung mit Gleitstück
DE102013010751A1 (de) * 2013-06-27 2014-12-31 Heidelberger Druckmaschinen Ag Dichtung für Rakeleinrichtungen
EP2821228A1 (fr) * 2013-06-27 2015-01-07 Heidelberger Druckmaschinen AG Joint pour systèmes de racle
US9272503B2 (en) 2013-06-27 2016-03-01 Heidelberger Druckmaschinen Ag Seal for doctor blade devices and doctor blade device having a seal
EP2930025A1 (fr) * 2014-04-11 2015-10-14 wiguTec Gummitechnologie GmbH & Co. KG Élément d'étanchéité
DE202021102690U1 (de) 2021-05-18 2022-08-22 Möllering Gummi- und Kunststoff-Technik GmbH Dichtelement, Rakelkammer mit einem Dichtelement und Druckmaschine mit einem Dichtelement

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