WO2008059079A1 - Racle pour groupe encreur dans une imprimante flexographique - Google Patents

Racle pour groupe encreur dans une imprimante flexographique Download PDF

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Publication number
WO2008059079A1
WO2008059079A1 PCT/ES2007/000605 ES2007000605W WO2008059079A1 WO 2008059079 A1 WO2008059079 A1 WO 2008059079A1 ES 2007000605 W ES2007000605 W ES 2007000605W WO 2008059079 A1 WO2008059079 A1 WO 2008059079A1
Authority
WO
WIPO (PCT)
Prior art keywords
removable body
removable
base body
strips
frame
Prior art date
Application number
PCT/ES2007/000605
Other languages
English (en)
Spanish (es)
Inventor
Jordi Puig Vila
Pierre Pasquet
Luis ESPARCH MARTÍ
Original Assignee
Comexi, 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39400674&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2008059079(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Comexi, Sa filed Critical Comexi, Sa
Priority to AT07823012T priority Critical patent/ATE551191T1/de
Priority to DK07823012.5T priority patent/DK2082877T4/en
Priority to EP07823012.5A priority patent/EP2082877B2/fr
Publication of WO2008059079A1 publication Critical patent/WO2008059079A1/fr

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2200/00—Printing processes
    • B41P2200/10—Relief printing
    • B41P2200/12—Flexographic printing

Definitions

  • the present invention concerns in general a scraper device that is part of an inking group in a flexographic printer, and in particular a scraper device adapted to be discarded along with some strapping installed therein when the strapping They need to be replaced after use.
  • Flexographic printers generally comprise a support on which a material to be printed rests, and several printing groups arranged to print different colors on it.
  • Each printing group comprises a printing roller bearing the cliché with the reasons to be printed arranged to make contact with the surface of the material to be printed on the support, an inking roller arranged to make contact with the cliché mounted on the printing roller, and a scraper device arranged to apply ink to the surface of the inking roller.
  • the printing roller, the inking roller and the scraper device are mounted on a frame of the printer by means of mechanisms that allow approximation and separation movements between them for tasks of regulation of the printing conditions, changes of shirts of the rollers, strap changes on the scraper device, or maintenance.
  • a common construction in the scraper devices for inking groups in flexographic printers of this type comprises a base body that defines a groove in the longitudinal direction flanked by two strips provided with respective cantilever portions terminated in sharp, parallel, arranged free edges to make dynamic contact against a surface of the inking roller in a working position.
  • lateral sealing means also arranged to make dynamic contact against said surface of the inking roller in said working position.
  • the device incorporates at least one input port and one output port in communication with said camera and in connection with ink circulation means for continuously introducing and evacuating ink from inside the chamber, so that the ink circulating through the chamber is applied to the surface of the inking roller.
  • This surface of the inking roller also called “anilox" roller, is of great hardness and comprises some cells or alveoli that are filled with ink when they are in contact with the ink inside the chamber while the alveoli move from a strap to the another when turning the inking roller.
  • the strap located in the forward position with respect to the direction of rotation of the inking roller acts to collect the remaining ink from the surface of the inking roller and leave only the ink that fills the alveoli.
  • WO 96/34751 describes an example of a scraper device of the type described above.
  • scraper devices In general, in order to avoid having the printer stopped for the entire duration of the operation, several scraper devices are available to have a scraper device operatively installed in the printer while performing the strap change operation in another, which implies a cost in added equipment.
  • a scraper device When it is desired to change the color of the ink used in the inking group it is also necessary to remove the base body of the printer to clean it thoroughly before reinstalling it in the printer and connecting it to the ink circulation media of the new color.
  • the free edges of the worn strips are extremely sharp, so that the operation of cleaning and / or changing the strapping of the device carries a considerable risk of suffering cuts for the user.
  • An objective of the present invention is to provide a scraper device for an inking group in a flexographic printer that allows a rapid operation of replacement of straps and / or lateral sealing means subjected to wear, that avoids cleaning operations, and that minimizes the risk of suffering cuts for the user.
  • the present invention contributes to achieving the above and other objectives by providing a scraper device for an inking group in a flexographic printer, of the type comprising an elongated frame, mounted on said inking group so that it can be approached to an inking roller or away from the same.
  • the aforementioned frame is composed of a base body and a removable body that can be fastened to said base body by means of fastening means, for example, by elastic snap-in coupling or by means of grooved sliding groove configurations.
  • Said removable body defines a camera-forming surface facing said inking roller and comprises support configurations to support two strips arranged flanking said camera-forming surface.
  • the said strips comprise respective free longitudinal edges arranged parallel to the axis of the inking roller to make dynamic contact against a cylindrical surface of the inking roller when the frame is close to the inking roller in a working position.
  • the device also includes lateral sealing means preferably supported on the removable body and disposed adjacent to opposite ends of the strips, limiting the camera-forming surface at its longitudinal ends, to make a dynamic sealing contact with said cylindrical surface of the inking roller , between the two strips, when the frame - A - is in said working position.
  • the removable body In the chamber-forming surface of the removable body are arranged input and output ports adapted to be connected to ink circulation means to introduce and evacuate ink from said chamber during the operation of the printer.
  • the removable body can be a piece obtained by extrusion, deep drawing or molding of a variety of materials including different plastics and aluminum alloy, among others.
  • the removable body is a molded part of a plastic material, with the straps and optionally the partially embedded sealing plates as inclusion pieces, so it is relatively inexpensive to produce, and is configured and arranged to be discarded along with the strips and replaced by a new removable body when the strips need to be replaced after use or when a change in the color or type of ink used in the device is required.
  • worn strips can be replaced with a fast and safe tide, avoiding the need to clean the chamber to change the straps and / or the lateral sealing means, or when an ink change is required, and minimizes the risk of cuts caused by strapping to an operator.
  • Fig. 1 is a cross-sectional view of a scraper device for an inking group in a flexographic printer according to a first embodiment of the present invention, in a working position in relation to an inking roller;
  • Fig. 2 is an enlarged view of the detail Il of Fig. 1;
  • Fig. 3 is an enlarged view of detail III of Fig. 1;
  • Fig. 4 is a perspective view of the scraper device of assembled Fig. 1;
  • Fig. 5 is an exploded perspective view of a base body and a removable body forming the scraper device of Fig. 1;
  • Fig. 6 is an exploded perspective view of the removable body of Fig. 5;
  • Fig. 7 is a cross-sectional view of a scraper device for an inking group in a flexographic printer according to a second embodiment of the present invention, in a working position in relation to an inking roller;
  • Fig. 8 is an exploded perspective view of a base body and a removable body that form the partially assembled scraper device of Fig. 7; and Fig. 9 is an exploded perspective view of a variant of the scraper device of Figs. 7 and 8.
  • the said scraper device comprises an elongated frame 1, prepared to be mounted in said inking group so that it can be approached to an inking roller 5 or away from it.
  • said frame 1 is shown in a working position, close to said inking roller 5.
  • transverse direction DT means a direction substantially perpendicular to said longitudinal direction DL
  • the frame 1 comprises a base body 21, adapted to be linked to a frame of the printer (not shown), and a removable body 15, adapted to be attached to said base body 21 by fastening means 20 that will be described in greater detail below in relation to Fig. 2.
  • Said removable body 15 defines a chamber-forming surface 2 facing the inking roller 5, and comprises first support configurations 16, 17 adapted to support two strips 3, 4 arranged flanking said chamber-forming surface 2 in the longitudinal direction DL thereof.
  • the mentioned strips 3, 4 have cantilevered portions terminated at respective free longitudinal edges 3a, 4a arranged parallel to the axis of the inking roller 5 to make dynamic contact against a cylindrical surface of the inking roller 5 when the frame 1 is close to the inking roller 5 in the mentioned work position.
  • the base body 21 defines a concave receiving surface 35, and the removable body 15 has a convex rear surface 39, opposite said chamber-forming surface 2.
  • the aforementioned rear surface is shaped to fit on said receiving surface 35 of the base body 21 .
  • the scraper device includes lateral sealing means 11, 12 supported on the removable body 15.
  • the said lateral sealing means 11, 12 comprise airtight plates 24, 25 housed in second support configurations 18, 19 of the removable body 15 and arranged adjacent to opposite ends of said strips 3, 4 transversely to the longitudinal direction DL of the removable body 15, such that said airtight plates 24, 25 limit the chamber-forming surface 2 at its longitudinal ends.
  • Each of said sealing plates 24, 25 has an edge 36 adapted to make a dynamic sealing contact with said cylindrical surface of the inking roller 5 between the two strips 3, 4 when the frame 1 is in said working position.
  • a resistant plate 32, 33 housed in said second support configurations 18, 19 of the removable body 15.
  • the sealing plates 24, 25 and the aforementioned resistant plates 32, 33 are fastened laterally by end caps 13, 14 fixed to the removable body 15, for example, by elastic snap coupling of studs 42 formed in said end caps 13, 14 in holes 43 formed at the ends of the removable body 15.
  • the sealing plates 24, 25 will typically be of an elastic material, such as, for example, an elastomeric polymer foam, the resistant plates 32, 33 may be metallic, and the end caps 13, 14 may be of a plastic material.
  • connection sleeves 44 (only one of which is visible in Fig.
  • sealing means are shown arranged to seal the connection between the openings 37, 38 formed in the receiving surface 35 of the base body 21 and the openings of the passages 30, 31 in the rear surface 39 of the body Removable 15 against possible ink leaks.
  • These sealing means comprise deformable sealing rings 40 (only one of which is visible in Figs. 1 and 3), arranged in respective annular grooves 41 formed around the openings 37, 38 in the receiving surface 35 of the body base 21.
  • the said sealing rings 40 tend to protrude from the grooves 41 to press against corresponding annular surface areas around the openings of the passages 30, 31 on the rear surface 39 of the removable body 15 when the removable body 15 is attached to the base body 21 in an operative situation.
  • said fastening means 20, better shown in Fig. 2 comprise conjugate elastic coupling configurations 22, 23, formed in the removable body 15 and the base body 21, respectively.
  • the aforementioned elastic snap coupling configurations 22 formed in the removable body 15 comprise surfaces formed all along outer longitudinal edges of the removable body 15, inclined a slight angle A relative to a transverse direction DT of coupling, substantially perpendicular to The longitudinal direction DL of the frame 1, and converging outwardly from the housing of the base body 21.
  • the configurations of elastic snap coupling 23 formed in the base body 21 comprise surfaces formed all along internal longitudinal edges.
  • the base body 21 includes end stops 34 adapted to retain the removable body 15 against displacements in the longitudinal direction DL when the removable body 15 is attached to the base body 21 in an operative situation.
  • grooves 46 are formed in intersection with the corresponding configuration of elastic snap coupling 23.
  • These grooves 46 serve to allow the introduction of a lever-like tool for decoupling the removable body 15 of the base body 21 when both are coupled in the operative situation shown in Fig. 4.
  • the removable body 15 is configured and disposed to be discarded together with the strips 3, 4 and the lateral sealing means 11, 12 when the strips 3, 4 need to be replaced after use, or when a change in color is required of the ink used in the inking group, and to be replaced by a new removable body 15 of analogous characteristics.
  • the removable body 15 is a molded part of a plastic material that can be manufactured with the strips 3, 4 partially embedded in their corresponding first support configurations 16, 17 as inclusion pieces.
  • the lateral sealing means 11, 12 are adapted to be installed to the removable body 15 after its manufacture
  • the sealing plates 24, 25 and the resistant plates 32, 33 can also be included in the molding process of the removable body 15 to be partially embedded in their corresponding second support configurations 18, 19 as inclusion pieces.
  • the removable body 15 can be manufactured by other techniques, for example, by extrusion or deep drawing, and the strips 3, 4, the sealing plates 24, 25, and where appropriate the resistant plates 32, 33, can be installed to the removable body 15 later.
  • the second scraper device exemplary embodiment shown in Figs. 7 and 8 comprises a frame 1 composed of a base body 21 and a removable body 15 provided with first support configurations 16, 17 in which two strips 3, 4 and second support configurations 18, 19 are arranged in which airtight plates 24, 25 and resistant plates 32, 33 are arranged. Also here, when the frame 1 is in the working position shown in Fig.
  • sealing means for sealing the connection between the openings 37, 38 formed in the receiving surface 35 of the base body 21 and the openings of the passages 30, 31 on the rear surface 39 of the removable body 15 have if they were removed, sealing rings 40 housed in respective annular grooves 41 could be included as in the first embodiment.
  • the fastening means 20 comprise configurations of conjugated ribs 26 and grooves 27 formed in the removable body 15 and in the base body 21, respectively.
  • an inverse construction would be possible, with the ribs formed in the base body 21 and the grooves formed in the removable body 15 with an equivalent result.
  • the aforementioned configurations of ribs 26 and grooves 27 are formed such that ribs 26 can be inserted in grooves 27 only in a longitudinal direction DL relative to the axis of the inking roller 5, and once coupled retain the removable body 15 attached to the body base 21 preventing any relative displacement in the transverse direction DT.
  • the removable body 15 can be installed or removed from the base body 21 by sliding in the longitudinal direction DL.
  • the end caps 13, 14 that hold the plates laterally of tightness 24, 25 and the said resistant plates 32, 33 in the second support configurations 18, 19 are adapted to be fixed to the base body 21 instead of to the removable body 15.
  • These end caps 13, 14 can be fixed, by for example, by elastic snap coupling of studs 47 protruding from the ends of the base body 21 in holes 48 formed in the end caps 13, 14.
  • the removable body 15 can be a molded part of a plastic material with the strips 3, 4 partially embedded in said first support configurations 16, 17 as inclusion parts .
  • the sealing plates 24, 25 and the resistant plates 32, 33 can also be included in the molding process of the removable body 15 to be partially embedded in their corresponding second support configurations 18, 19 as inclusion pieces.
  • the removable body 15 of the frame 1 of the second embodiment is also configured and disposed to be discarded together with the strips 3, 4 and the lateral sealing means 11, 12 when the strips 3, 4 need to be replaced after their use, or when a change in the color of the ink used in the inking group is required, and to be replaced by a new removable body 15 of analogous characteristics.
  • Fig. 9 a variant of the embodiment described above is shown in relation to Figs. 7 and 8, in which the chamber-forming surface 2 of the removable body 15 comprises a third support configuration 49 in which a third strap 50 is supported that has a free longitudinal edge 5a arranged parallel to the axis of the inking roller 5 to make dynamic contact against the cylindrical surface of the inking roller 5, between the edges is free longitudinal 3a, 4a to the two strips 3, 4, when the frame 1 is close to the inking roller 5 in the working position.
  • This third strap divides chamber 6 into first and second half cameras, which are connected to each other.
  • the input and output ports 7, 8 comprise plug-in connection means arranged on opposite surfaces at adjacent ends of the base body 21 and the removable body 15, respectively, to communicate the circulation means of ink with said first and second half cameras when the removable body 15 is coupled to the base body 21 by means of a slide in the longitudinal direction DL of the frame 1.
  • the inlet port 7 comprises a first connection sleeve 51 fixed to an end cap 14 attached to the base body 21.
  • This first connection sleeve 51 is connected from the outside to a conduit of the ink circulation means and from the inner side to a first plug nozzle 52 protruding inward from the end cap 14.
  • the said first plug nozzle 52 is in a position facing a first plug opening 53 formed at an axial end of the removable body 15 and in communication with the first half camera.
  • the outlet port 8 comprises a second connection sleeve 54 fixed to the end cap 14 attached to the base body 21 and which is connected on the outside to a conduit of the ink circulation means and from the inside to a second opening of plug 55, while from the aforementioned axial end of the removable body 15 a second plug nozzle 56 protrudes outwardly that is in communication with the second half chamber and located in a position facing said second plug opening 55.
  • the third strap 50 is shorter than the chamber-forming surface 2, d and a way that provides a passage between the first and second half-cameras at the end of the removable body 15 opposite to the plug-in connection means.
  • said communication could also be done by other means, such as, by for example, through holes formed in the third strap or communication channels formed internally in the removable body (15).

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Rotary Presses (AREA)

Abstract

L'invention concerne une racle pour groupe encreur dans une imprimante flexographique. Cette racle comprend un corps amovible (15) pouvant être fixé à un corps de base (21) par des moyens de fixation (20). Le corps amovible (15) définit une surface formée par une chambre (2) disposée face à un rouleau encreur (5) et porte deux lames (3, 4) et des moyens d'obturation latéraux (11, 12) disposés sur le côté de ladite surface formant une chambre (2) pour établir un contact dynamique hermétique avec ledit rouleau encreur (5) dans une position de travail, formant ainsi une chambre. Dans la surface formant une chambre (2) du corps amovible (15) sont formés des ports d'entrée et de sortie (7) pouvant être raccordés à des moyens de circulation d'encre pour l'introduction et l'évacuation de l'encre de ladite chambre (6). Le corps amovible (15) est de préférence en plastique et est disposé et conçu pour être jeté avec les lames (3, 4) lorsque ces dernières doivent être remplacées après utilisation.
PCT/ES2007/000605 2006-11-16 2007-10-25 Racle pour groupe encreur dans une imprimante flexographique WO2008059079A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT07823012T ATE551191T1 (de) 2006-11-16 2007-10-25 Rakelvorrichtung für ein farbwerk in einer flexodruckmaschine
DK07823012.5T DK2082877T4 (en) 2006-11-16 2007-10-25 RACKLE FOR A COLOR UNIT IN A FLEXOGRAPHIC PRINTING MACHINE
EP07823012.5A EP2082877B2 (fr) 2006-11-16 2007-10-25 Racle pour groupe encreur dans une imprimante flexographique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200602914A ES2300202B1 (es) 2006-11-16 2006-11-16 Dispositivo de rasqueta para un grupo entintandor de una impresora flexografica.
ESP200602914 2006-11-16

Publications (1)

Publication Number Publication Date
WO2008059079A1 true WO2008059079A1 (fr) 2008-05-22

Family

ID=39400674

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2007/000605 WO2008059079A1 (fr) 2006-11-16 2007-10-25 Racle pour groupe encreur dans une imprimante flexographique

Country Status (5)

Country Link
EP (1) EP2082877B2 (fr)
AT (1) ATE551191T1 (fr)
DK (1) DK2082877T4 (fr)
ES (1) ES2300202B1 (fr)
WO (1) WO2008059079A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008152050A1 (fr) * 2007-06-11 2008-12-18 Windmöller & Hölscher Kg Racle de compartiment à encre dans un mécanisme d'encrage de presse rotative

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105058981A (zh) * 2015-09-09 2015-11-18 温州方力机械有限公司 一种柔版印刷机的上墨装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140901A (en) * 1990-04-20 1992-08-25 Man Roland Druckmaschinen Ag Printing machine with chambered doctor blade unit
WO1993024328A1 (fr) * 1992-05-22 1993-12-09 Boeoese Aake Dispositif racleur a chambre pour unite d'impression, et unite d'impression
WO1996034751A1 (fr) 1995-05-03 1996-11-07 Windmöller & Hölscher Racloir pour mecanismes d'encrage de rotatives
US6799508B1 (en) * 1999-05-11 2004-10-05 Saint Eloi Mecanique Outillage S.A. Inking device for a flexographic printing machine anilox roll
WO2005105450A1 (fr) * 2004-05-05 2005-11-10 Akeboose International Ab Dispositif et procede pour chambre a racles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK49188D0 (da) * 1988-02-01 1988-02-01 Tresu As Rakel
US5406887A (en) † 1993-01-15 1995-04-18 Paper Converting Machine Company Apparatus and method for doctor blade replacement in a flexographic press
US6293195B1 (en) * 1998-10-07 2001-09-25 Alhsontech Sales Incorporated Chambered flexographic ink units with quick-change, blade thickness compensating clamping mechanism

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140901A (en) * 1990-04-20 1992-08-25 Man Roland Druckmaschinen Ag Printing machine with chambered doctor blade unit
WO1993024328A1 (fr) * 1992-05-22 1993-12-09 Boeoese Aake Dispositif racleur a chambre pour unite d'impression, et unite d'impression
WO1996034751A1 (fr) 1995-05-03 1996-11-07 Windmöller & Hölscher Racloir pour mecanismes d'encrage de rotatives
US6799508B1 (en) * 1999-05-11 2004-10-05 Saint Eloi Mecanique Outillage S.A. Inking device for a flexographic printing machine anilox roll
WO2005105450A1 (fr) * 2004-05-05 2005-11-10 Akeboose International Ab Dispositif et procede pour chambre a racles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2082877A4

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008152050A1 (fr) * 2007-06-11 2008-12-18 Windmöller & Hölscher Kg Racle de compartiment à encre dans un mécanisme d'encrage de presse rotative

Also Published As

Publication number Publication date
ATE551191T1 (de) 2012-04-15
DK2082877T3 (da) 2012-06-04
EP2082877A1 (fr) 2009-07-29
DK2082877T4 (en) 2016-11-14
ES2300202B1 (es) 2009-02-16
EP2082877B1 (fr) 2012-03-28
EP2082877A4 (fr) 2011-09-21
EP2082877B2 (fr) 2016-07-13
ES2300202A1 (es) 2008-06-01

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