EP4368399A1 - Dispositif de nettoyage de tête d'impression, imprimante à jet d'encre et procédé de nettoyage de tête d'impression - Google Patents

Dispositif de nettoyage de tête d'impression, imprimante à jet d'encre et procédé de nettoyage de tête d'impression Download PDF

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Publication number
EP4368399A1
EP4368399A1 EP23207833.7A EP23207833A EP4368399A1 EP 4368399 A1 EP4368399 A1 EP 4368399A1 EP 23207833 A EP23207833 A EP 23207833A EP 4368399 A1 EP4368399 A1 EP 4368399A1
Authority
EP
European Patent Office
Prior art keywords
print head
cleaning
pressure element
projection
recess
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.)
Pending
Application number
EP23207833.7A
Other languages
German (de)
English (en)
Inventor
Franziska Peinze
Patrick RADTKE
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.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei GmbH
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 Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Publication of EP4368399A1 publication Critical patent/EP4368399A1/fr
Pending legal-status Critical Current

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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
    • B41J2/16535—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
    • B41J2/16502—Printhead constructions to prevent nozzle clogging or facilitate nozzle cleaning
    • 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
    • B41J2/16538—Cleaning of print head nozzles using wiping constructions with brushes or wiper blades perpendicular to the nozzle plate
    • 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
    • B41J2/16544—Constructions for the positioning of wipers
    • 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
    • B41J2002/1655—Cleaning of print head nozzles using wiping constructions with wiping surface parallel with nozzle plate and mounted on reels, e.g. cleaning ribbon cassettes

Definitions

  • the invention relates to a device for cleaning a print head with a cleaning head module, wherein the cleaning head module has a pressure element, in particular a replaceable one, and is adjustable between a cleaning position in which the pressure element is pressed against a print head underside of the print head, and a release position in which the pressure element is released from the print head. Furthermore, the invention relates to an inkjet printer and a method for cleaning a print head.
  • Print heads can become dirty, which can impair print quality.
  • ink particularly based on organic solvents
  • squeegees especially rubber squeegees
  • dirt such as dried ink or various dirt particles.
  • inks that contain relatively large pigments for example pigments with a diameter greater than 1 ⁇ m, can quickly lead to complete clogging of nozzles.
  • the EN 10 2015 220 943 A1 describes a device and a method for cleaning a print head, in which a pressure element is pressed against the print head in a cleaning position and released from the print head in a release position. This device and the associated method have proven themselves well in practice.
  • the object of the present invention is to provide a device for cleaning a print head, an inkjet printer and a method for cleaning an inkjet printer, by means of which a further improved cleaning effect is achieved.
  • the object relating to the device is achieved by a device having the features of claim 1.
  • the object relating to the inkjet printer is achieved by an inkjet printer having the features of claim 8 and the object relating to the method is achieved by a method having the features of claim 9.
  • the device is characterized in particular by the fact that the pressure element has at least one projection on the side facing the underside of the print head, which in a cleaning position is accommodated in a recess formed on the underside of the print head.
  • Recesses are formed on the underside of the print head, in particular through the print head nozzles or between the individual print head nozzles. Any remaining ink residue in these recesses can thus be removed using the projections and the print head can thus be cleaned better not only over the surface of the underside of the print head, but also in the recesses. This enables ink residue/dirt to be completely or at least largely removed from the print head.
  • the at least one projection and the at least one recess are designed to complement each other. This makes it possible to provide an individually suitable pressure element for each design of the print head and thus to ensure optimal cleaning for each print head design. In particular, it is advantageous with regard to automated production and for maintenance of the device if the pressure element is designed to be replaceable.
  • the position of the pressure element must be changed in order to be able to clean the print head at different angles.
  • the individual adjustment, preferably complementary adjustment of the pressure element to the design of the underside of the print head thus enables the print head to be cleaned completely or at least largely with just one pressure element and only one pressing process. Cleaning is therefore more thorough and takes place more quickly.
  • the pressure element has a number of projections adapted to the number of recesses formed on the underside of the print head, which projections are accommodated in the respective recesses in a cleaning position. This makes it possible to clean all recesses on the print head by accommodating the projection.
  • the design of the projection is adapted to the design of the recess.
  • the at least one projection is designed such that in the cleaning position it is received circumferentially with play in the recess such that it can be moved within the recess to a limited extent. Due to the limited mobility within the recess, an additional cleaning effect can be achieved by moving the projection back and forth in and against a cleaning direction. The additional friction of the projection on the recess surface caused by the movement improves the Cleaning result and also enables encrusted ink residues to be removed.
  • the projection can be designed as a vibration head, in particular as an ultrasonic head, which generates vibrations, in particular in the ultrasonic frequency range.
  • the limited movement of the projection within the recess can therefore preferably take place exclusively through the projection being designed to vibrate in the ultrasonic frequency range.
  • the projection can be designed to be movable to a limited extent within the recess, i.e. displaceable, and can also be set to vibrate in the ultrasonic frequency range. The vibrations of the projection, in particular in the ultrasonic frequency range, allow dried ink to be removed from the recess even better.
  • the projection has at least one additional tooth on its side facing the underside of the print head.
  • a plurality of additional teeth are present. This allows ink residues to be absorbed in the interdental spaces formed between two teeth.
  • the surface area of the cleaning surface is increased by means of the teeth.
  • the pressure element is structured, which also improves the cleaning effect.
  • at least one brush can be formed on the at least one tooth or in an interdental space formed between two teeth, which also improves the cleaning effect.
  • at least one of the teeth can preferably also be designed to vibrate, in particular to vibrate in the ultrasonic range.
  • a cloth or a brush is arranged on the side of the pressure element facing the underside of the print head. This improves the cleaning of the print head.
  • the cloth can in particular be structured and/or have a pile, particularly preferably a deep pile.
  • the inkjet printer according to the invention is characterized by the device described above and by a print head with one or more Recesses, whereby the embodiments, advantages and effects described for the device are also applicable to the inkjet printer.
  • the cleaning head module is transferred from a release position in which the pressure element is released from the print head into a cleaning position in which the pressure element is pressed against the underside of the print head.
  • a projection of the pressure element arranged on a side facing the underside of the print head is engaged in a recess of the print head formed on the underside of the print head for cleaning the print head or nozzle.
  • the projection is moved to a limited extent within the recess in the cleaning position and/or if the projection vibrates within the recess in the cleaning position.
  • the limited back and forth movement of the projection within the recess and the friction generated thereby can therefore be realized exclusively by vibration, in particular by ultrasound, or the projection can be moved back and forth within the recess to a limited extent, with the projection or at least one of the teeth additionally vibrating in the ultrasonic frequency range.
  • the additional friction caused by the back and forth movement and/or by the vibration also allows encrusted ink residues to be easily removed.
  • Fig.1 shows a perspective view of a device 1 for cleaning a print head 2, in particular of dried ink particles and other dirt particles.
  • the device 1 comprises a cleaning head module 4.
  • the device 1 also comprises a carriage 5, wherein the cleaning head module 4 is movably, in particular pivotably, attached to the carriage 5.
  • the cleaning head module 4 is arranged on a free end 6 of a pivot arm 7, wherein the pivot arm 7 is rotatably attached to the carriage 5, in particular rotatably attached to a carriage plate 8.
  • the device 1 also comprises a pivot bearing 9, which enables a rotational or pivoting movement of the pivot arm 7.
  • the device 1 further comprises a base plate 10.
  • This base plate 10 can be attached to a printing table (not shown in detail), in particular to a front side of the printing table.
  • the device 1 further comprises guide elements designed as guide rails 12 for guiding a movement of the carriage 5. The movement is guided in and against a cleaning direction RR, which is in Fig.1 is shown by an arrow.
  • the carriage 5 performs a linear movement in and against the cleaning direction RR. If the carriage 5 is moved in and against the cleaning direction RR, the movable part on the carriage 5 is also moved. attached cleaning head module 4 moves in and against the cleaning direction RR.
  • the device 1 further comprises a device for moving the carriage 5.
  • This device can comprise a motor 13, in particular a servo motor, which, in particular its output shaft, is mechanically connected to the carriage 5 via a spindle drive with a spindle 14. When the output shaft rotates, the carriage 5 moves along the spindle 14, its movement being guided by the guide rails 12.
  • the device 1 further comprises a cleaning element designed as a cloth 15, wherein at least a portion of the cloth 15 is held by the cleaning head module 4.
  • the cloth 15 can be structured and/or formed with a pile, in particular with a deep pile.
  • the device 1 also has a cloth dispensing device 16 and a cloth receiving device 17.
  • the cloth dispensing device 16 provides the cleaning cloth 15 in the form of a roll, wherein the cleaning cloth 15 can be unwound from the cloth dispensing device 16, which is designed as a cylinder around which the cleaning cloth 15 can be wound.
  • the cleaning cloth 15 is received, in particular wound up, as a roll by the cloth receiving device 17, which is also designed as a cylinder around which the cleaning cloth 15 can be wound.
  • the device 1 also comprises a device 18 for moving the cleaning cloth 15.
  • the device 18 can be designed in particular as a servo motor which is mechanically coupled to the cloth receiving device 17, in particular to the cylinder of the cloth receiving device 17.
  • the cloth receiving device 17 can be rotated by means of the device 18, as a result of which the cleaning cloth 15 is wound up and unwound from the cloth dispensing device 16.
  • the cloth dispensing device 16, the cloth receiving device 17 and the device 18 are fastened to the carriage plate 8, wherein the cloth dispensing device 16 and the cloth receiving device 17 are rotatably mounted on the carriage plate 8.
  • the cleaning head module 4 has a pressure element and can be moved by means of the carriage 5 in the cleaning direction RR and against the cleaning direction RR along the guide rail 12. In addition, the cleaning head module 4 can be moved between a Figure 2 shown release position and one in Figure 3 shown cleaning position. By adjusting the cleaning head module 4 in particular vertically into the cleaning position, the pressure element 3 is pressed against a print head underside 22 of the print head 2. This enables the print head 2, in particular the print head nozzles, to be cleaned. By adjusting the cleaning head module 4 in or against the cleaning direction RR, the print head 2 can then be cleaned. After cleaning, the cleaning head module 4 is adjusted, in particular by moving the carriage 5 vertically, into the release position in which the pressure element 3 is released from the print head 2 and the print head is therefore not cleaned.
  • Print heads 2 usually have at least one, usually several recesses 19 in the form of print head nozzles or gaps on the print head underside 22.
  • the pressure element 3 has at least one projection 11 or pin on the side facing the print head underside 22, which is at least partially received in the at least one recess 19 of the print head in the cleaning position.
  • the print head 2 can thus also be cleaned in the recesses 19 by the respective projections 11.
  • the projections 11 and the recesses 19 are preferably designed to be complementary to one another.
  • the print head underside 22 and the pressure element 3 on the side facing the print underside 22 are thus designed to be complementary to one another.
  • the pressure element 3 can in particular be designed to be exchangeable, so that for each design/construction of the print head 2, in particular on its printing underside 22, a matching pressure element 3, ie one formed complementarily to the print head 2, can be provided. This makes it possible to use the device 1 with different inkjet printers 21 with differently designed print heads 2.
  • the pressure element 3 has a number of projections 11 adapted to the number of recesses 19 formed on the print head underside 22, as shown in the Figures 2 to 4 which are accommodated in the respective recesses 19 in a cleaning position.
  • Figure 2 shows that the design of the projections 11 is adapted to the design of the recess 19, ie the geometric design of the projection 11 and the recess 19 match each other.
  • the projections 11 are designed such that in the cleaning position they are received on the circumference with play 23 in the recess 19 such that they can be moved to a limited extent within the recess 19, in particular in and/or against the cleaning direction RR, as indicated by the double arrow.
  • a limited back and forth movement of the projection 11 in and against the cleaning direction RR can improve the cleaning result through additional friction.
  • the projection 11 can be designed as a vibration head, in particular as an ultrasound head, which generates vibrations, in particular in the ultrasound frequency range.
  • the limited movement of the projection 11 within the recess 19 can therefore preferably take place exclusively by the projection 11 being designed to vibrate in the ultrasound frequency range.
  • the projection 11 can be designed to be movable to a limited extent within the recess 19, i.e. displaceable, and can also be set into vibration, for example in the ultrasound frequency range.
  • the projection 11 can be formed at least partially, particularly on its surface, from a piezoceramic material which expands or contracts when a voltage is applied.
  • Figure 4 shows that the projection 11 has a plurality of additional teeth 20 on its side facing the print head underside 22. This increases the cleaning surface of the cleaning head 4.
  • ink residues can be collected in the interdental spaces formed between two teeth 20. or other dirt can be picked up.
  • a brush (not shown in detail) can be arranged on the at least one tooth 20 or in a tooth gap formed between two teeth 20 in order to further improve the cleaning effect.
  • at least one of the teeth 20 can also be designed to vibrate - in particular in the ultrasonic range.
  • the Figures 2 and 4 also show that a cloth 15 is arranged on the side of the pressure element 3 facing the print head underside 22.
  • This can be structured and/or formed with a pile, in particular a deep pile.
  • a brush can also be arranged there.
  • the method for cleaning a print head 2 comprises the following steps: From the release position, the carriage 5 and thus the cleaning head module 4 are moved towards the print head 2 and thus adjusted to the cleaning position.
  • the pressure element 3 of the cleaning head module 4 is pressed against the underside 22 of the print head.
  • the at least one projection/projections 11 are at least partially received in the respective recesses 19, so that both the recesses 19 are cleaned by means of the cloth 15 and the surface of the underside 22 of the print head.
  • the cleaning head module 4 is then adjusted along the guide rail 12 in the cleaning direction RR in order to travel over the entire print head 2.
  • the carriage 5 can optionally be moved back and forth to a limited extent in and against the cleaning direction RR in such a way that the projection 11 is also moved back and forth to a limited extent within the recess 19.
  • the projection 11 or at least one of the teeth 20 can vibrate in the cleaning position, in particular in the ultrasonic frequency range.
  • the limited back and forth movement of the projection 11 within the recess 19, and the friction generated thereby can be realized exclusively by vibration, in particular by ultrasound, or the projection 11 can be moved back and forth within the recess to a limited extent, with the projection 11 or at least one of the teeth 20 additionally vibrating in the ultrasonic frequency range. This additional friction improves the cleaning result.
  • the pressure element 3 is released from the print head 2 again.
  • the projection/projections 11 are removed from the recesses 19 and the cleaning head 4 is moved back into the release position.

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EP23207833.7A 2022-11-08 2023-11-06 Dispositif de nettoyage de tête d'impression, imprimante à jet d'encre et procédé de nettoyage de tête d'impression Pending EP4368399A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022129512.5A DE102022129512A1 (de) 2022-11-08 2022-11-08 Vorrichtung zur Reinigung eines Druckkopfes, Tintenstrahldrucker und Verfahren zur Reinigung eines Druckkopfes

Publications (1)

Publication Number Publication Date
EP4368399A1 true EP4368399A1 (fr) 2024-05-15

Family

ID=90624956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23207833.7A Pending EP4368399A1 (fr) 2022-11-08 2023-11-06 Dispositif de nettoyage de tête d'impression, imprimante à jet d'encre et procédé de nettoyage de tête d'impression

Country Status (2)

Country Link
EP (1) EP4368399A1 (fr)
DE (1) DE102022129512A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001071513A (ja) * 1999-09-07 2001-03-21 Canon Inc インクジェット記録装置
US20050156995A1 (en) * 2004-01-20 2005-07-21 Konica Minolta Medical & Graphic, Inc. Inkjet printer
JP2012143947A (ja) * 2011-01-11 2012-08-02 Sii Printek Inc 液体拭取りユニット及び液体噴射装置
EP2839961A1 (fr) * 2012-04-20 2015-02-25 Seiko I Infotech Inc. Imprimante à jet d'encre
EP3144152A1 (fr) * 2015-09-18 2017-03-22 Seiko Epson Corporation Appareil d'éjection de liquide et dispositif de nettoyage
DE102015220943A1 (de) 2015-10-27 2017-04-27 Bundesdruckerei Gmbh Vorrichtung und Verfahren zur Reinigung eines Druckkopfes
EP3450177A1 (fr) * 2017-09-04 2019-03-06 Krones AG Station de nettoyage pour une station d'impression directe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4853717A (en) 1987-10-23 1989-08-01 Hewlett-Packard Company Service station for ink-jet printer
JP2003291359A (ja) 2002-04-03 2003-10-14 Seiko Instruments Inc インクジェットヘッドのメンテナンス機構
JP4626264B2 (ja) 2004-10-28 2011-02-02 ブラザー工業株式会社 記録ヘッドの保管装置および保管方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001071513A (ja) * 1999-09-07 2001-03-21 Canon Inc インクジェット記録装置
US20050156995A1 (en) * 2004-01-20 2005-07-21 Konica Minolta Medical & Graphic, Inc. Inkjet printer
JP2012143947A (ja) * 2011-01-11 2012-08-02 Sii Printek Inc 液体拭取りユニット及び液体噴射装置
EP2839961A1 (fr) * 2012-04-20 2015-02-25 Seiko I Infotech Inc. Imprimante à jet d'encre
EP3144152A1 (fr) * 2015-09-18 2017-03-22 Seiko Epson Corporation Appareil d'éjection de liquide et dispositif de nettoyage
DE102015220943A1 (de) 2015-10-27 2017-04-27 Bundesdruckerei Gmbh Vorrichtung und Verfahren zur Reinigung eines Druckkopfes
EP3450177A1 (fr) * 2017-09-04 2019-03-06 Krones AG Station de nettoyage pour une station d'impression directe

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