EP2995459B1 - Procede de nettoyage des residus d'encre d'une tete d'impression a jet d'encre - Google Patents

Procede de nettoyage des residus d'encre d'une tete d'impression a jet d'encre Download PDF

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Publication number
EP2995459B1
EP2995459B1 EP15175402.5A EP15175402A EP2995459B1 EP 2995459 B1 EP2995459 B1 EP 2995459B1 EP 15175402 A EP15175402 A EP 15175402A EP 2995459 B1 EP2995459 B1 EP 2995459B1
Authority
EP
European Patent Office
Prior art keywords
gel
ink
cleaning
nozzle
head
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.)
Active
Application number
EP15175402.5A
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German (de)
English (en)
Other versions
EP2995459A1 (fr
Inventor
Bernhard Buck
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
Original Assignee
Heidelberger Druckmaschinen AG
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Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP2995459A1 publication Critical patent/EP2995459A1/fr
Application granted granted Critical
Publication of EP2995459B1 publication Critical patent/EP2995459B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16552—Cleaning of print head nozzles using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16535—Cleaning of print head nozzles using wiping constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16552—Cleaning of print head nozzles using cleaning fluids
    • B41J2002/16558—Using cleaning liquid for wet wiping

Definitions

  • the present invention relates to a method for cleaning an ink jet head of ink residues having the features of the preamble of claim 1.
  • the invention is in the technical field of printing with inkjet heads. Such heads must be cleaned from adhering ink or remnants of ink from time to time, especially in the case of clogged and spilled nozzles (so-called "missing nozzles").
  • the known state of the art in this technical field comprises the following: Cleaning devices and cleaning methods performed by them are generally known, whereby spray nozzles, rubber lips, blowing and suction devices, cloths and residual containers are used. Even liquid cleaning agents, such as acetone, can be used. Used detergent and ink residues are disposed of.
  • the DE 36 12 299 A1 discloses a cleaning method for printheads in which cleaning liquid is collected and passed into absorbent polymeric material which then swells to a gel.
  • Ink residue collected and thickened to a gel is in each case in a collecting container and a contact of the gel with a nozzle surface of the head is not provided.
  • JP 2007 083642 A describes the cleaning of the nozzle surface of an ink jet head by means of a "wiper" consisting of a container containing a gel containing smectite having thixotropic properties. The nozzle surface is contacted with the gel and moved relative to the surface of the gel in the container. Deposits on the nozzle surface go over into the gel.
  • the EP 1 018 430 A1 while describing the ink cleaning using a gel, however, this gel acts purely chemically by dissolving the ink.
  • a method according to the invention for cleaning an ink jet head from residual ink, wherein a cleaning agent is applied and removed on a surface of the head which has nozzle openings, wherein the cleaning agent is applied to the surface as a gel is characterized in that the gel between the application and removal for a period of time to act on the surface, the gel is a substantially purely physically-cleansing gel which adheres to the surface and / or is located in the nozzles (channels) by physical submergence / creep removed and that the gel contains no solvent other than water.
  • a "gel” is to be understood as meaning a system of at least one solid and one liquid phase which is gelatinous in its consistency (rather solid than liquid) and finely dispersed in its structure.
  • the solid phase forms a spongy, three-dimensional network whose pores are filled by a liquid or gas.
  • the method according to the invention advantageously makes it possible to clean printheads in a simple manner and with a very good result.
  • nozzle surfaces contaminated with dried / cured UV ink can thus be effectively cleaned again.
  • even downwardly facing nozzle surfaces can be drip-proof with the detergent for a given exposure time be charged. Damage to the print head by a mechanical action can also be avoided with advantage.
  • the order of the cleaning agent on the nozzle surface is carried out according to the invention already as a gel and not as a liquid.
  • the invention differs from the prior art, in which a liquid applied and removed again and then (ie not on the nozzle surface) is gelled.
  • the inventive method can be done with built-in heads in the printing press. Alternatively, the method can also be carried out outside the machine in a separate cleaning station with removed heads.
  • a preferred embodiment of the invention may also be characterized in that the time period is in the range between about 1 second and about 10 minutes, in particular in the range between about 10 seconds and about 3 minutes. Such exposure time is particularly advantageous in conjunction with the use of purely physically acting gels (see next two paragraphs).
  • Examples of such a physically cleansing gel are the products named “intelligent fluids "® or” lisoCLEAR "® from the company bubbles and beyond GmbH in Leipzig, Germany. According to the manufacturer, these products penetrate deeply into impurities, diffuse through and under layers of paint and dirt and lift them off the surface to be cleaned quickly, without pores and without residue. A chemical dissolution or etching does not take place, so smudging is prevented (see website www.intelligent-fluids.com category: industrial cleaning).
  • a preferred development of the invention may be distinguished by the fact that the gel is provided in a cap which approximates to the surface or is brought into contact with the surface (in its edge region, but not in its nozzle region).
  • the cap is moved, preferably up and down.
  • the head can be moved towards the cap.
  • the cap and the gel can also remain on the nozzle surface (so-called "capping").
  • the cap then serves to prevent the ink and gel from drying. Because a gel is used instead of a liquid according to the invention, it can also be advantageously prevented that the cleaning agent leaves the cap, e.g. during prolonged storage or when moving the cap.
  • a preferred development of the invention may be distinguished by the fact that the gel is applied to the surface with a doctor blade or with a roller and if necessary also removed again with these agents.
  • the gel can also be applied with a nozzle, in particular a slot nozzle, which is moved past the head. Constructively more complex but also possible in the head integrated nozzles for the gel.
  • Yet another solution may be to place a gel pad on the nozzle surface for the above period of time. Gel pads can be supplied with the cap and removed.
  • a preferred development of the invention can be characterized in that the head is controlled such that ink is moved in at least one nozzle, in particular that the ink is moved back and forth.
  • a preferred development of the invention can also be characterized in that the head is driven in such a way that that gel is sucked into at least one nozzle. In this way, gel can be introduced into the nozzles. There, the gel can physically act on existing blockages. However, ejection of ink is not provided. Only the ink column in the nozzle channel with its ink meniscus, ie the interface between the ink and the atmosphere, should be moved, thereby "pumping" gel back and forth.
  • a preferred development of the invention may be distinguished by the fact that the gel and ink residues are blotted from the surface, sucked off and / or rinsed off. Even an ink rinse is an advantage. Finally, it can be dried.
  • the invention also relates to a device for carrying out the method with a gel-filled cap which can be approached / adjusted to the nozzle surface.
  • a device for carrying out the method with a gel-filled cap which can be approached / adjusted to the nozzle surface.
  • Such a device can serve several heads by approaching different cleaning positions.
  • the invention also relates to an ink jet printing machine with at least one such device.
  • FIG. 1 shows a device 1 in carrying out a preferred embodiment of the method according to the invention.
  • the process carried out is for cleaning an ink jet head 2, preferably for printing UV ink, of ink residues 11, wherein a cleaning agent on a surface 3 of the head, which after having downwardly facing nozzle openings 4 'of nozzles 4, applied and removed again.
  • the ink residues may have dried. They can adhere to the surface and / or clog the nozzle openings.
  • the device 1 comprises a cap 4, which is (preferably automated) approximated to the surface 3 or brought into contact with the surface.
  • a mechanical stop can prevent the bottom surface of the cap from touching the nozzle surface 3.
  • a gel 6 is provided, which is applied as a cleaning agent on the surface. The gel thus comes into contact with the surface and the nozzle openings 4 '. Preferably, the entire surface is charged with the gel.
  • the cap 5 together with the gel 6 at least approximated to the surface 3 the cap remains in the cleaning position for a certain period of time.
  • the gel may be physically active during this period of time.
  • the cap is removed together with the gel again from the cleaning position. Remaining remainder of the gel and cleaned ink residues 11 are dabbed, sucked off and / or rinsed with water. Finally, a rinse can be done with ink.
  • FIG. 1 also shows an alternative cap 5a with a compensating membrane 7, which allows it to make the cap together with the gel 6 under a desired pressure to the surface 3, wherein the membrane makes a compensating movement.
  • FIG. 1 further shows an alternative cap 5b with a compensation chamber 8, which is not filled with gel prior to putting the cap on the head 2. Therefore, the chamber also allows to make the cap together with the gel 6 under a desired pressure to the surface 3, wherein the chamber can fill with gel. Both embodiments prevent gel from being forced out of the gap between face 3 and cap.
  • FIG. 2 shows a further device 1 in carrying out a preferred embodiment of the method according to the invention.
  • the device comprises a doctor blade 9 or alternatively a roller (not shown), with which the gel 6 is applied to the surface 3.
  • a control unit 10 which drives the print head 2.
  • the control unit allows the movement of ink in the nozzles, in particular the reciprocation of an ink column and its meniscus in the region of the nozzle opening 4 '. In this way, the gel 6 can be sucked by the moving ink into the nozzle opening and ejected again.
  • the control can be done with a specially provided for this cleaning process Waveform. No ink is ejected.

Landscapes

  • Ink Jet (AREA)

Claims (7)

  1. Procédé pour le nettoyage d'une tête d'impression par jet d'encre (1) de résidus d'encre (11), un nettoyant étant appliqué sur une surface (3) de la tête (1), qui présente des ouvertes de buses (4'), et qui est ensuite éliminé, le nettoyant étant appliqué comme un gel (6) sur la surface (3), le gel (6) étant un gel (6) nettoyant essentiellement purement physique, qui élimine les résidus d'encre (11) adhérant à la surface (3) et le gel (6) ne contenant aucun solvant autre que l'eau,
    caractérisé en ce
    que le gel (2) reste sur la surface pendant la durée d'action sur la surface entre l'application et le retrait et
    que le gel élimine les résidus d'encre (11) adhérant à la surface (3) par détachement et glissement vers le bas.
  2. Procédé selon la revendication 1,
    caractérisé en ce
    que la durée d'action est comprise entre environ 1 seconde et 10 minutes, en particulier entre 10 secondes et environ 3 minutes.
  3. Procédé selon l'une des revendications précédentes,
    caractérisé en ce
    que le gel (6) est prévu dans un capuchon (5, 5a, 5b) qui est rapproché de la surface (3) ou est mis en contact avec la surface (3).
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce
    que le gel (6) est appliqué par une racle (7) ou par un rouleau (7) sur la surface (3).
  5. Procédé selon l'une des revendications précédentes,
    caractérisé en ce
    que la tête (2) est commandée de sorte que l'encre est déplacée dans au moins une buse (4) en particulier que l'encre soit déplacée en va et vient.
  6. Procédé selon la revendication 5,
    caractérisé en ce
    que la tête (2) est commandée de sorte que le gel (6) est aspiré dans au moins une buse (4).
  7. Procédé selon l'une des revendications précédentes,
    caractérisé en ce
    que le gel (6) et les résidus d'encre (11) sont épongés, aspirés et/ou rincés de la surface (3).
EP15175402.5A 2014-09-10 2015-07-06 Procede de nettoyage des residus d'encre d'une tete d'impression a jet d'encre Active EP2995459B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014013406.7A DE102014013406A1 (de) 2014-09-10 2014-09-10 Verfahren zum Reinigen eines Tintenstrahlkopfes von Tintenresten

Publications (2)

Publication Number Publication Date
EP2995459A1 EP2995459A1 (fr) 2016-03-16
EP2995459B1 true EP2995459B1 (fr) 2018-06-06

Family

ID=53525097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15175402.5A Active EP2995459B1 (fr) 2014-09-10 2015-07-06 Procede de nettoyage des residus d'encre d'une tete d'impression a jet d'encre

Country Status (5)

Country Link
US (1) US20160067973A1 (fr)
EP (1) EP2995459B1 (fr)
JP (1) JP2016055641A (fr)
CN (1) CN106183422A (fr)
DE (1) DE102014013406A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6834161B2 (ja) * 2016-03-25 2021-02-24 カシオ計算機株式会社 描画装置及び描画装置の描画方法
DE102020105736A1 (de) * 2019-04-09 2020-10-15 Heidelberger Druckmaschinen Aktiengesellschaft Inkjet-Druckkopfreinigung mit Ultraschall

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3612299A1 (de) 1985-04-13 1986-10-16 Sharp K.K., Osaka Tintenstrahldrucker mit vorrichtung zur vermeidung von duesenverstopfungen
US5907335A (en) * 1996-11-13 1999-05-25 Hewlett-Packard Company Wet wiping printhead cleaning system using a non-contact technique for applying a printhead treatment fluid
US6102518A (en) * 1997-04-07 2000-08-15 Hewlett-Packard Company Liquid capping system for sealing inkjet printheads
JP2000203040A (ja) * 1999-01-08 2000-07-25 Hewlett Packard Co <Hp> プリントヘッド・クリ―ニング・システム
US6350012B1 (en) * 1999-06-28 2002-02-26 Xerox Corporation Method and apparatus for cleaning/maintaining of an AIP type printhead
JP2001315346A (ja) * 2000-03-02 2001-11-13 Fuji Xerox Co Ltd インク乾燥防止装置、それを備えたインクジェット記録ヘッド保管容器およびインクジェット記録装置、ならびにインク乾燥防止方法
US6595617B2 (en) * 2000-12-29 2003-07-22 Eastman Kodak Company Self-cleaning printer and print head and method for manufacturing same
WO2006074016A2 (fr) * 2004-12-30 2006-07-13 Fujifilm Dimatix, Inc. Impression a jet d'encre
JP4769499B2 (ja) 2005-07-08 2011-09-07 富士フイルム株式会社 インクカートリッジ、インクジェット記録装置、及び廃インクカートリッジ
JP4640599B2 (ja) * 2005-09-26 2011-03-02 ブラザー工業株式会社 インクジェット記録装置
EP2045320B1 (fr) * 2007-09-19 2012-04-25 Bubbles & Beyond Gmbh Produit de nettoyage pour la suppression de couches de couleurs de surfaces, procédé de fabrication du produit et procédé de nettoyage
JP5106339B2 (ja) * 2008-09-30 2012-12-26 富士フイルム株式会社 液滴吐出装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN106183422A (zh) 2016-12-07
DE102014013406A1 (de) 2016-03-10
US20160067973A1 (en) 2016-03-10
EP2995459A1 (fr) 2016-03-16
JP2016055641A (ja) 2016-04-21

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