EP0949074B1 - Dichtung für Kammerrakel - Google Patents
Dichtung für Kammerrakel Download PDFInfo
- Publication number
- EP0949074B1 EP0949074B1 EP98101431A EP98101431A EP0949074B1 EP 0949074 B1 EP0949074 B1 EP 0949074B1 EP 98101431 A EP98101431 A EP 98101431A EP 98101431 A EP98101431 A EP 98101431A EP 0949074 B1 EP0949074 B1 EP 0949074B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- doctor
- chamber
- doctor blade
- sealing block
- 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
Links
Images
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 chamber doctor blade for a printing press, with a Sealing block made of resilient material attached to one end of the doctor blade is inserted between two doctor blades, one by the circumference of one Application roller of the printing press, the doctor blade and a housing of the chamber doctor blade limited ink chamber, and on the facing the applicator roller Surface is covered with a strip of elastic material, that is harder than the material of the sealing block.
- 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 chamber squeegee has a housing that extends over the entire length of the applicator roller extends, and carries at least two doctor blades that rotate the circumference Doctor blade and together with the housing of the chamber doctor blade and the peripheral surface of the applicator roller lying between the doctor blades limit a color chamber.
- the applicator roller has on its surface mostly a regular grid of flat cups with ink be filled when the relevant peripheral portion of the applicator roller moved through the ink chamber, and then the ink thus picked up deliver to the impression cylinder.
- Seals serve to seal off the ink chamber at the ends.
- seals of this type have a block of resilient material, for example made of felt, which is between the two doctor blades in the Housing of the chamber doctor blade is inserted and close to the two doctor blades and on the intermediate portion of the surface of the applicator roller is present.
- the flexibility of the sealing block enables a good seal on the circumference of the application roller and allows an increasingly stronger line-up the chambered doctor blade to the applicator roller according to the progressing Doctor knife wear.
- the material of the sealing block must be meet various requirements that have so far not been satisfactory with each other reconcile. On the one hand, it must be reliable and On the other hand, it should ensure permanent sealing of the ink chamber in terms of the frictional contact between the sealing block and the rotating applicator roller have the highest possible abrasion resistance, so the sealing block does not work off too quickly.
- EP-A-0 438 731 is a chamber doctor blade with a seal according to the preamble of claim 1 known, in which the surface facing the applicator roller of the sealing block coated with a mixture of copper and Teflon is.
- the object of the invention is a seal for the chamber doctor blade of a printing press to create, which has a higher wear resistance and a allows permanent and reliable sealing of the ink chamber.
- This strip prevents direct contact between the compliant Material of the sealing block and the surface of the application roller.
- the Application roller is only in with the strip of relatively hard material Friction contact, which has a high abrasion resistance. Because this strip on the other hand however is elastic and due to the resilient material of the sealing block is pressed evenly against the circumference of the application roller, a reliable seal can nevertheless be achieved.
- the material of the actual Sealing block can be considered in the Optimized in terms of chemical resistance and hardness become.
- the masking strip either can be hard enough and elastic material, for example metal, can be used is resistant to printing inks and solvents. The necessary Resilience can then be selected by appropriate selection of the thickness of this strip reach easily.
- the elastic strip simply with its rear end in the direction of rotation of the application roller into one formed between the doctor blade and the housing of the chamber doctor Pocket inserted while the opposite end of the strip is loose is. Since the frictional forces between the application roller and the strip in Direction towards the attached end of the strip that is inserted into the pocket the strip is not pulled out of the pocket.
- the opposite free end of the strip can either be under the other doctor knife concern or between the doctor blade and the scope of the Applicator roller to be guided outside.
- 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 the ink chamber 20 at the end.
- the sealing block 30, however, is not directly on the circumference of the application roller 10 on, but it is through on its surface facing the applicator roller covered a thin, elastic strip 34 of metal, the width of which is greater than that of the sealing block 30.
- This strip 34 is by the compliant material of the sealing block 30 in full contact with the applicator roller 10 held and stands with the smooth end portion 26 of the applicator roller in sliding contact. In this way it becomes excessive Wear of the sealing block 30 avoided without the sealing effect is affected.
- the strip 34 is with its in the direction of rotation Applicator roller 10 attached to the chambered doctor blade 12 at the rear end.
- the purpose is to end the strip 34 in a between the doctor blade 16 (left in Figure 1) and the housing 14 formed pocket 36 inserted.
- the acting between the applicator roller 10 and the strip 34 Frictional forces tend to counter this streak to the left in Figure 1 to press the doctor blade 16 and the bottom of the pocket 36 so that stable attachment of the strip 34 is achieved in a simple manner.
- the strip 34 is bent relatively sharply or angled so that there is no leak.
- the opposite The end of the strip 34 is also angled or bent and at the embodiment of Figure 1 loosely inserted under the doctor blade 18.
- FIG. 3 shows a modified embodiment in which the strip 34 with its rear end in any suitable manner on the doctor blade 16 is attached while the front end between the edge of the doctor knife 18 and the scope of the applicator roller 10 emerges and freely from the Farmer chamber 20 protrudes.
- the end portion of the doctor blade 18 covered by the strip 34 must necessarily form a gap with the circumference of the application roller 10, whose width corresponds to the material thickness of the strip 34.
- the doctor blade 18 on the circumference of the application roller Since the doctor blade 18 with the scope of Applicator roller 10 forms an acute angle, it can in its end portion due to the pressing force with which the doctor blade against the application roller is made to give way elastically to the gap for passage of the strip 34 to form while the doctor blade on the rest of the part the desired squeegee effect along its length.
- the doctor blade 18 against wear protected, so that wear of the doctor blade essentially only in the length range that occurs at the central portion 24 of the applicator roller is present. This different wear of the doctor blade can also be compensated for by elastic yielding of the doctor blade.
Description
- Figur 1
- einen schematischen Schnitt durch eine Auftragwalze und eine Kammerrakel mit einer erfindungsgemäßen Dichtung;
- Figur 2
- einen schematischen Längsschnitt entsprechend der Linie II- II in Figur 1; und
- Figur 3
- einen vergrößerten Teilschnitt entsprechend Figur 1, jedoch für ein anderes Ausführungsbeispiel der Erfindung.
Claims (6)
- Kammerrakel (12) für eine Druckmaschine, mit einem Dichtungsblock (30) aus nachgiebigem Material, der an einem Ende der Kammerrakel zwischen zwei Rakelmessern (16, 18) eingesetzt ist, eine durch den Umfang einer Auftragwalze (10) der Druckmaschine, die Rakelmesser und ein Gehäuse (14) der Kammerrakel begrenzte Farbkammer (20) abschließt, und an der der Auftragwalze (10) zugewandten Oberfläche mit einem Streifen (34) aus elastischem Material bedeckt ist, das härter ist als das Material des Dichtungsblockes, dadurch gekennzeichnet, daß der Streifen (34) lösbar und nur mit einem Ende am Gehäuse (14) der Kammerrakel und/oder an einem der Rakelmesser (16) befestigt ist.
- Kammerrakel nach Anspruch 1, dadurch gekennzeichnet, daß der Streifen (32) aus Metall besteht.
- Kammerrakel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Streifen (34) mit seinem in Rotationsrichtung der Auftragwalze (10) hinteren Ende an der Kammerrakel befestigt ist.
- Kammerrakel nach Anspruch 3, dadurch gekennzeichnet, daß der Streifen (34) in eine zwischen dem Rakelmesser (16) und dem Gehäuse (14) der Kammerrakel gebildete Tasche (36) eingesteckt ist.
- Kammerrakel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das entgegengesetzte Ende des Streifens (34) an der der Farbkammer (20) zugewandten Innenfläche des anderen Rakelmessers (18) anliegt.
- Kammerrakel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das entgegengesetzte Ende des Streifens (34) zwischen dem anderen Rakelmesser (18) und dem Umfang der Auftragwalze (10) austritt.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98101431A EP0949074B1 (de) | 1998-01-28 | 1998-01-28 | Dichtung für Kammerrakel |
DE59800788T DE59800788D1 (de) | 1998-01-28 | 1998-01-28 | Dichtung für Kammerrakel |
US09/215,972 US6016748A (en) | 1998-01-28 | 1998-12-18 | Seal for a chamber doctor blade |
JP11015356A JPH11254650A (ja) | 1998-01-28 | 1999-01-25 | チャンバ用ドクタ―ブレ―ド装置のためのシ―ル装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98101431A EP0949074B1 (de) | 1998-01-28 | 1998-01-28 | Dichtung für Kammerrakel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0949074A1 EP0949074A1 (de) | 1999-10-13 |
EP0949074B1 true EP0949074B1 (de) | 2001-05-30 |
Family
ID=8231316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98101431A Expired - Lifetime EP0949074B1 (de) | 1998-01-28 | 1998-01-28 | Dichtung für Kammerrakel |
Country Status (4)
Country | Link |
---|---|
US (1) | US6016748A (de) |
EP (1) | EP0949074B1 (de) |
JP (1) | JPH11254650A (de) |
DE (1) | DE59800788D1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008042263A1 (de) * | 2008-09-22 | 2010-06-17 | Koenig & Bauer Aktiengesellschaft | Vorrichtung zum Aufbringen von Druckfarbe |
DE202014101740U1 (de) | 2014-04-11 | 2015-07-14 | Wigutec Gummitechnologie Gmbh & Co. Kg | Dichtungselement |
EP2930025A1 (de) | 2014-04-11 | 2015-10-14 | wiguTec Gummitechnologie GmbH & Co. KG | Dichtungselement |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29903308U1 (de) * | 1999-02-24 | 1999-09-30 | Nordson Corp | Rad-Auftragsvorrichtung |
FR2792249B1 (fr) * | 1999-04-19 | 2001-06-22 | Fort James France | Dispositif d'etancheite d'extremite pour chambre a racle |
DE10047394A1 (de) * | 1999-10-15 | 2001-04-19 | Heidelberger Druckmasch Ag | Modulares Druckmaschinensystem zum Bedrucken von Bogen |
ES2216725B1 (es) * | 2004-04-20 | 2006-01-16 | Comexi, Sa | Dispositivo de rasqueta para un grupo entintador de una impresora flexografica. |
ATE525209T1 (de) * | 2005-01-24 | 2011-10-15 | Gallus Ferd Rueesch Ag | Tiefdruckwerk zum bedrucken einer bedruckstoffbahn in einer druckmaschine |
US20070261577A1 (en) * | 2006-04-26 | 2007-11-15 | Burrow William J | Printing roll with dead band helical pattern |
US7597761B2 (en) * | 2006-08-10 | 2009-10-06 | Van Denend Mark E | Sealing assembly for an ink chamber which includes self-lubricating anilox roll seal with improved blade/seal area |
DK176626B1 (da) * | 2007-08-21 | 2008-12-01 | Tresu Anlaeg As | Pakning til kammerrakel |
US20090193990A1 (en) * | 2008-02-06 | 2009-08-06 | Van Denend Mark E | Seal for an Ink Chamber with Improved Blade/Seal Area |
DE202009013643U1 (de) | 2009-10-26 | 2011-03-17 | Zeljko, Kitic | Dichtelement |
US8474378B1 (en) | 2010-02-23 | 2013-07-02 | Valley Holdings, Llc | Chamber blade/sealing assembly for a printing press |
DE102013010751A1 (de) | 2013-06-27 | 2014-12-31 | Heidelberger Druckmaschinen Ag | Dichtung für Rakeleinrichtungen |
JP6344810B1 (ja) * | 2018-02-13 | 2018-06-20 | 下村 恭一 | グラビア印刷方法およびそれに用いるスキージー |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2887049A (en) * | 1955-12-29 | 1959-05-19 | Harris Intertype Corp | Ink fountain |
US4821672A (en) * | 1987-06-22 | 1989-04-18 | Nick Bruno | Doctor blade assembly with rotary end seals and interchangeable heads |
DE4001733A1 (de) * | 1990-01-22 | 1991-07-25 | Windmoeller & Hoelscher | Rakelvorrichtung fuer ein spuelfarbwerk einer rotationsdruckmaschine |
US5103732A (en) * | 1991-02-14 | 1992-04-14 | Ward Holding Company, Inc. | Doctor blade head assembly and printing apparatus therewith |
DE4302671A1 (de) * | 1993-01-30 | 1994-08-18 | Roland Man Druckmasch | Kurzfarbwerk |
DE4315595C2 (de) * | 1993-05-11 | 1995-02-16 | Roland Man Druckmasch | Einsatz für Keilfarbkästen von Druckmaschinen |
GB2278315B (en) * | 1993-05-27 | 1996-06-12 | Roland Man Druckmasch | Chambered doctor blade unit |
GB9615254D0 (en) * | 1996-07-20 | 1996-09-04 | Fowden James | Rotary floating sealed fluid applicator with quick release applicator clamps |
-
1998
- 1998-01-28 DE DE59800788T patent/DE59800788D1/de not_active Expired - Lifetime
- 1998-01-28 EP EP98101431A patent/EP0949074B1/de not_active Expired - Lifetime
- 1998-12-18 US US09/215,972 patent/US6016748A/en not_active Expired - Lifetime
-
1999
- 1999-01-25 JP JP11015356A patent/JPH11254650A/ja active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008042263A1 (de) * | 2008-09-22 | 2010-06-17 | Koenig & Bauer Aktiengesellschaft | Vorrichtung zum Aufbringen von Druckfarbe |
DE102008042263B4 (de) * | 2008-09-22 | 2011-01-27 | Koenig & Bauer Aktiengesellschaft | Vorrichtung zum Aufbringen von Druckfarbe |
DE202014101740U1 (de) | 2014-04-11 | 2015-07-14 | Wigutec Gummitechnologie Gmbh & Co. Kg | Dichtungselement |
EP2930025A1 (de) | 2014-04-11 | 2015-10-14 | wiguTec Gummitechnologie GmbH & Co. KG | Dichtungselement |
Also Published As
Publication number | Publication date |
---|---|
US6016748A (en) | 2000-01-25 |
DE59800788D1 (de) | 2001-07-05 |
JPH11254650A (ja) | 1999-09-21 |
EP0949074A1 (de) | 1999-10-13 |
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