EP1364783A2 - Machine d'impression à grande vitesse avec une matrice d'impression flexographique pour des feuilles transportées par un convoyeur à courroie aspirante sans fin - Google Patents

Machine d'impression à grande vitesse avec une matrice d'impression flexographique pour des feuilles transportées par un convoyeur à courroie aspirante sans fin Download PDF

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Publication number
EP1364783A2
EP1364783A2 EP03425316A EP03425316A EP1364783A2 EP 1364783 A2 EP1364783 A2 EP 1364783A2 EP 03425316 A EP03425316 A EP 03425316A EP 03425316 A EP03425316 A EP 03425316A EP 1364783 A2 EP1364783 A2 EP 1364783A2
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EP
European Patent Office
Prior art keywords
roll
printing
machine
matrix
ink
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.)
Granted
Application number
EP03425316A
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German (de)
English (en)
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EP1364783B1 (fr
EP1364783A3 (fr
Inventor
Maria Teresa Cintio
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Individual
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Individual
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Publication date
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Application filed by Individual filed Critical Individual
Priority to SI200330668T priority Critical patent/SI1364783T1/sl
Publication of EP1364783A2 publication Critical patent/EP1364783A2/fr
Publication of EP1364783A3 publication Critical patent/EP1364783A3/fr
Application granted granted Critical
Publication of EP1364783B1 publication Critical patent/EP1364783B1/fr
Priority to CY20071100253T priority patent/CY1107340T1/el
Anticipated expiration legal-status Critical
Revoked 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing

Definitions

  • the present invention refers to a high-speed printing machine with flexo printing matrix for sheets, panels, plates and/or similar items of fibre-wood, MDF, plywood, cardboard, ceramic and any other material, which uses fast-drying inks that are more environmental friendly than water inks.
  • the minimum layout comprises a roll with flexo printing matrix, an inking assembly with inking roll in contact with flexo printing matrix around the matrix roll and a closed-loop perforated conveyor belt that moves on a suction-operated surface to transport the items to be printed.
  • the movement of the items to the printing stations is ensured by the force generated between the items and the perforated belt, thanks to the depression caused by air suction through the belt holes.
  • the invention can be advantageously applied on printing machines for sheets and/or panels in general, and in particular in the sector of plywood, MDF, fibre-wood and/or cardboard fruit and vegetable packaging.
  • printing machines used to print panels/sheets of this type are generally made up of multiple printing groups for multiple colours, with fixed closed distances between printing groups.
  • Rolls are generally made of steel and/or rubber and have a smooth external surface on which ink adheres because of viscosity and is then transferred onto the matrix with approximately uniform layer.
  • Oil ink dries very slowly and is absorbed very slowly by the aforementioned materials, and it is not possible to use drying stations due to lack of time caused by the reduced space between printing machines and by the speed of the sheets. In view of the above, the limits of this type of printing machines appear evident as regards quality printing.
  • Inking assemblies have numerous disadvantages since they are characterised by very large volume and complex operation, due to the large number of rolls needed to spread ink. They do not allow for multiple colour printing due to the problems related with roll cleaning when passing from one colour to another. Moreover, oil inks are not environmental friendly, since their components are not biodegradable and are sometimes very polluting. Moreover, ink waste requires expensive disposal.
  • Printing machines with water-based ink and flexo printing matrix fixed to the printing roll have been devised. Sheets and/or panels are moved to the printing stations by means of chain-mounted elements. These machines, however, are penalised by numerous problems.
  • the transportation system of the sheets to the printing stations does not allow for keeping colour register on sheets during printing.
  • the roll-mounted cliché mounted does not have dimensional variations on development; the elements used to transport the sheets to the printing stations suffer from chain wear, thus changing the movement speed of the sheet to the printing stations. This causes continuous colour out-of-register situations, which cannot be controlled, resulting in poor printing quality.
  • This system is not suitable for printing the aforementioned materials, since it does not print the entire surface of sheets/panels.
  • the driving rolls must be in contact with the two sides of the sheet/panel, including the printed side.
  • this system requires a long time to place the driving rings in the areas where the sheet is not printed.
  • paper tends to come off from panels during the following operations and transportation in refrigerated vehicles.
  • the printing machines that are currently used are not capable of providing acceptable printing quality on materials such as plywood, MDF, fibre-wood, cardboard, etc. Moreover, in view of their low absorption capacity, these materials require fast-drying ink, such as water ink, and a precise, reliable system to transport sheets and/or panels to the printing stations to print the entire surface.
  • the purpose of the invention is to realise a printing machine with flexo printing matrix that uses fast-drying ink, including water ink, to colour print sheets and/or panels of different materials, provided with a transportation system of the sheets to the printing stations characterised by simple operation, speed, safety and accuracy, in order to eliminate the aforementioned drawbacks, as well as ecological problems.
  • the present invention refers a printing machine with flexo printing matrix for sheets, panels, plates and/or similar items of fibre-wood, MDF, plywood, cardboard, ceramic and similar materials, transported via a suction-operated continuous conveyor belt with at least a roll with flexo printing matrix, an inking assembly realised in different constructive modes, always including an inking roll in contact with the flexo printing matrix around the matrix roll, and a closed-loop perforated conveyor belt that moves on a suction-operated surface to transport the items to be printed.
  • the movement of the items to the printing stations is ensured by the force generated between the items and the perforated belt, thanks to the depression caused by air suction through the belt holes, through a suction unit located in a second area of the roll with flexo printing matrix.
  • the cylindrical external surface of the inking roll is provided with micro-incisions and is partially immersed in water ink that can be contained in a small tank, channel or chamber.
  • Fig. 1 is a diagrammatic view of a high-speed flexo printing machine with two printing machines, especially suitable to print panels of wood, fibre-wood, plywood, MDF, cardboard, ceramic and similar materials.
  • Every printing machine comprises a roll (01) that supports a flexo printing matrix (03) wound on the roll (01) and a closed-loop perforated conveyor belt (04) that moves on a suction-operated surface (05) to transport the item (06) to be printed.
  • the movement of the item to the printing stations is ensured by the force generated between the item (06) and the perforated belt (04) thanks to the depression caused by air suction through the holes of the belt (04) by means of a suction unit (25) connected to the belt with a pipe (24).
  • the conveyor belt (04) positioned around the roll (01) can push the sheet-panel to be printed against the matrix (03) in perfect contact to obtain good graphic quality.
  • each printing machine comprises an inking assembly with different construction.
  • Fig. 1 is a diagrammatic view of a two-colour flexo printing machine with two inking assemblies (26) composed of a ink chamber (07) next to the cylindrical external surface of the inking roll (02), with doctors (08) used to remove excessive ink from the surface of the inking roll (02) before transferring the ink to the matrix (03).
  • the ink is taken from a container (10) with a pump (11), pushed through an abduction duct (12) inside the chamber (07) and poured into the container (10) through the overflow duct (13).
  • Fig. 2 is a diagrammatic view of a part of a printing machine with inking assembly (27) comprising a small tank (09) that contains the ink taken from the container (10) with the pump (11).
  • the ink is maintained at constant level through an abduction duct (12) and an overflow duct (13).
  • a doctor (14) acts on the inking roll (02) in order to engage its border with the roll surface.
  • the doctor (14) is used to remove excessive ink from the surface of the inking roll (02) before transferring the ink to the matrix (03).
  • Fig. 3 is a diagrammatic view of a part of a printing machine with inking assembly (28) comprising a longitudinal contact channel between a roll (15) covered with elastomeric material and the external surface of the inking roll (02).
  • This version is provided with a tank (16) in higher position than the channel fed by the tank (16) by means of controlled fall through a duct (17).
  • the tank (16) has an abduction duct (12) and an overflow duct (13) so that the ink is taken from a container (10) with a pump (11) and maintained at constant level by pouring excessive ink into the container (10).
  • the ends of the rolls (15 and 02) house two tanks (18) to recover the ink and convey it into the container (10) through the duct (21).
  • a doctor (19) is applied parallel to the roll (02) in such a way that its border engages with the surface of the roll (02) in an area comprised between the contact of the two rolls (15 and 02) and the contact with the matrix (03).
  • the cylindrical external surface of the inking roll (02) is provided with micro-incisions and partially immersed in ink stored in different types of containers, as shown in Figs. 1, 2 and 3.
  • the ink transported by the micro-incisions is a calibrated reserve sufficient to ink the relief parts of the matrix (03) uniformly and constantly.
  • the ink adheres to the surface of the relief parts and is immediately transferred to the panel (06) in the contact area on the pressure counter-roll (21).
  • the peripheral speed of the inking roll (02), the speed of the relief parts of the flexo printing matrix and the speed of the suction-operated belt (04) must be perfectly identical in order not to cause dragging.
  • the machine Since fruit and vegetable packages are printed with different colours, in order to complete the printing, the machine is provided with other printing devices same as the machine shown in Fig. 1, 2, or 3.
  • a polymeric shock-absorbing cushion (20) with lower hardness than the matrix (03) is mounted next the matrix (03).
  • the cushion compensates planarity errors and thickness differences of the sheets, to ensure necessary uniformity of pressure and adherence of the flexo printing matrix (03) when the matrix (03) comes into contact with the sheet/panel (06) to transfer the print ink, in order to avoid deformation of the relief parts of the flexo printing matrix (03).
  • a brush with suction unit is installed before the printing stations to remove dust and/or saw dust.
  • Hot air jets are provided and then evacuated in the areas immediately after each printing group, in order to realise high-speed chromatic effect printing.
  • the sheets/panels are fed in synchronisation with the movement of the perforated conveyor belt and with the printing groups.
  • one of the printing groups as illustrated above can be used to apply overprint paint with suitable drying unit to provide glossy finish to the item, which can be either transported to the next machining stations or collected.
  • synchronisation is ensured by means of electrical axles driven by electronic devices; or by means of mechanic and/or hydraulic and/or electric and/or electronic devices.
  • the printing machine of the invention is much simpler and cheaper than currently used machines; the replacement of ink with a different colour is much easier and faster compared to a group with oil ink; consequently, cleaning is simpler and quicker.
  • the roll (01) with flexo printing matrix is devised for replacement of the sleeve with flexo printing matrix (03) by simple air pressure, allowing for axially removal of the sleeve.
  • the system of the invention considerably reduced setup and shutdown time.
  • the suction-operated conveyor belt (04) used to move the sheets/panels (06) is especially accurate in positioning the panels next to the matrix (03); it is reliable, economically convenient and requires minimum maintenance.
  • the present invention can be advantageously used in the field of printing machines for sheets and/or panels of plywood, wood, fibre-wood, MDF, cardboard, ceramic and/or similar materials for all uses and especially in the field of customised fruit and vegetable packaging.
  • the invention is not limited to specific shapes, dimensions, geometrical arrangements, aesthetics, or materials in the different embodiments of printing machines. Likewise, the invention is not limited to specific inks and/or sheets/panels. Modifications and improvements can be made on the printing machine of the invention within the scope of the claims.
  • the counter-roll (21) may wind the belt (04) and act as matrix roll (22); it may act as belt return roll (23), or it may be replaced by extending the surface (05) where the suction-operated belt (04) moves.
  • Each printing group may have its own suction-operated continuous conveyor belt (04) and the counter-roll (21) may come into direct contact with the sheet (06).
  • the roll (02) instead of taking ink directly, may receive it from at least one absorbing roll parallel and in contact with the surface of the roll, which must be at least partially immersed in ink.
  • a roll covered with elastomeric material parallel and in contact with the surface of the roll (02) may be installed in the area where the doctor (14) is engaged to replace the doctor.
  • Ink can be fed in different ways other than illustrated above, as well as manually.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Printing Methods (AREA)
  • Discharge By Other Means (AREA)
  • Advancing Webs (AREA)
  • Screen Printers (AREA)
  • Making Paper Articles (AREA)
  • Handling Of Sheets (AREA)
  • Belt Conveyors (AREA)
  • Coating Apparatus (AREA)
  • Drying Of Solid Materials (AREA)
EP03425316A 2002-05-20 2003-05-16 Machine d'impression à grande vitesse avec une matrice d'impression flexographique pour des feuilles transportées par un convoyeur à courroie aspirante sans fin Revoked EP1364783B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200330668T SI1364783T1 (sl) 2002-05-20 2003-05-16 Visokohitrostni tiskarski stroj s fleksograficno tiskarsko matrico za pole, transportirane preko kontinuiranega sesalnega tracnega transporterja
CY20071100253T CY1107340T1 (el) 2002-05-20 2007-02-22 Μηχανη εκτυπωσης μεγαλης ταχυτητας με ελαστικη μητρα εκτυπωσης για φυλλα που μεταφερονται μεσω ενος ιμαντα μεταφορας συνεχους αναρροφησης

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2002AP000005A ITAP20020005A1 (it) 2002-05-20 2002-05-20 Apparecchiatura di stampa ad alta velocita' con matrice flexografica diretta su foglio trasportato da nastro continuo aspirante
ITAP20020005 2002-05-20

Publications (3)

Publication Number Publication Date
EP1364783A2 true EP1364783A2 (fr) 2003-11-26
EP1364783A3 EP1364783A3 (fr) 2004-12-15
EP1364783B1 EP1364783B1 (fr) 2006-11-22

Family

ID=11437451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03425316A Revoked EP1364783B1 (fr) 2002-05-20 2003-05-16 Machine d'impression à grande vitesse avec une matrice d'impression flexographique pour des feuilles transportées par un convoyeur à courroie aspirante sans fin

Country Status (9)

Country Link
EP (1) EP1364783B1 (fr)
AT (1) ATE345931T1 (fr)
CY (1) CY1107340T1 (fr)
DE (1) DE60309773T2 (fr)
DK (1) DK1364783T3 (fr)
ES (1) ES2255891T3 (fr)
IT (1) ITAP20020005A1 (fr)
PT (1) PT1364783E (fr)
SI (1) SI1364783T1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1625935A1 (fr) * 2004-08-10 2006-02-15 Kabushiki Kaisha Isowa Machine d'impression flexographique avec système d'encrage
EP2008816A2 (fr) * 2007-06-25 2008-12-31 BARBERAN LATORRE, Jesus Francisco Machine d'impression multifonction
KR200448538Y1 (ko) * 2010-02-17 2010-04-21 신종일 플렉소 인쇄에 사용되는 인쇄판
US8328303B2 (en) 2006-06-26 2012-12-11 Dante Frati Process for printing surfaces of wood-based flat elements
EP2862715A3 (fr) * 2013-10-18 2015-06-03 manroland web systems GmbH Presse
CN106364150A (zh) * 2016-08-26 2017-02-01 太仓市鑫鹤印刷包装有限公司 一种具有良好吸附功能的印刷台架
WO2017103300A1 (fr) * 2015-12-14 2017-06-22 Comercial Industrial Maquinaria Carton Ondulado, S.L. Module de transporteur pour corps laminaires dans une presse d'impression flexographique et presse d'impression flexographique
CN106903988A (zh) * 2017-04-12 2017-06-30 苏州玖陆伍壹机器人有限公司 一种印刷机单机自动加墨系统
CN112874128A (zh) * 2021-01-15 2021-06-01 深圳市旺盈彩盒纸品有限公司 一种纸板印刷装置及其印刷方法
CN113370646A (zh) * 2021-04-27 2021-09-10 安徽天元塑业有限公司 一种水泥包装袋连续刻印装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021103215A1 (de) 2021-02-11 2022-08-11 Koenig & Bauer Ag Bogendruckmaschine mit Flexo-Druckwerk, oberem Saugtransportmittel und Trockner

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005653A (en) * 1974-09-09 1977-02-01 Livermore And Knight Co., Inc. Vacuum cylinder for printing presses
GB2207092A (en) * 1987-06-24 1989-01-25 Totceramica Maquinaria Machine for printing ceramic pieces
EP0616886A1 (fr) * 1993-03-26 1994-09-28 Jean Pierre Cuir Installation pour l'impression feuille à feuille et ligne d'impression correspondante
US5531313A (en) * 1994-05-07 1996-07-02 Heidelberger Druckmaschinen Ag Device for conveying a continuous shingled sheet stream
EP0739730A2 (fr) * 1995-04-27 1996-10-30 Mitsubishi Jukogyo Kabushiki Kaisha Machine à imprimer flexographique
US5878664A (en) * 1997-07-15 1999-03-09 Hartka; Theodore J Printing system and method
EP0941843A1 (fr) * 1998-03-12 1999-09-15 Innovapack di Bagalini Giulio Machine pour l'impression flexographique de plaques en bois, plaques de fibres, multiplex et/ou analogues

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005653A (en) * 1974-09-09 1977-02-01 Livermore And Knight Co., Inc. Vacuum cylinder for printing presses
GB2207092A (en) * 1987-06-24 1989-01-25 Totceramica Maquinaria Machine for printing ceramic pieces
EP0616886A1 (fr) * 1993-03-26 1994-09-28 Jean Pierre Cuir Installation pour l'impression feuille à feuille et ligne d'impression correspondante
US5531313A (en) * 1994-05-07 1996-07-02 Heidelberger Druckmaschinen Ag Device for conveying a continuous shingled sheet stream
EP0739730A2 (fr) * 1995-04-27 1996-10-30 Mitsubishi Jukogyo Kabushiki Kaisha Machine à imprimer flexographique
US5878664A (en) * 1997-07-15 1999-03-09 Hartka; Theodore J Printing system and method
EP0941843A1 (fr) * 1998-03-12 1999-09-15 Innovapack di Bagalini Giulio Machine pour l'impression flexographique de plaques en bois, plaques de fibres, multiplex et/ou analogues

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1625935A1 (fr) * 2004-08-10 2006-02-15 Kabushiki Kaisha Isowa Machine d'impression flexographique avec système d'encrage
US8328303B2 (en) 2006-06-26 2012-12-11 Dante Frati Process for printing surfaces of wood-based flat elements
US8960828B2 (en) 2006-06-26 2015-02-24 Dante Frati Process for printing wood-based flat elements and production line
US9340033B2 (en) 2006-06-26 2016-05-17 Dante Frati Process for printing wood-based flat elements and production line
EP2008816A2 (fr) * 2007-06-25 2008-12-31 BARBERAN LATORRE, Jesus Francisco Machine d'impression multifonction
EP2008816A3 (fr) * 2007-06-25 2010-05-26 BARBERAN LATORRE, Jesus Francisco Machine d'impression multifonction
KR200448538Y1 (ko) * 2010-02-17 2010-04-21 신종일 플렉소 인쇄에 사용되는 인쇄판
EP2862715A3 (fr) * 2013-10-18 2015-06-03 manroland web systems GmbH Presse
WO2017103300A1 (fr) * 2015-12-14 2017-06-22 Comercial Industrial Maquinaria Carton Ondulado, S.L. Module de transporteur pour corps laminaires dans une presse d'impression flexographique et presse d'impression flexographique
CN106364150A (zh) * 2016-08-26 2017-02-01 太仓市鑫鹤印刷包装有限公司 一种具有良好吸附功能的印刷台架
CN106903988A (zh) * 2017-04-12 2017-06-30 苏州玖陆伍壹机器人有限公司 一种印刷机单机自动加墨系统
CN106903988B (zh) * 2017-04-12 2018-09-11 苏州玖陆伍壹机器人有限公司 一种印刷机单机自动加墨系统
CN112874128A (zh) * 2021-01-15 2021-06-01 深圳市旺盈彩盒纸品有限公司 一种纸板印刷装置及其印刷方法
CN112874128B (zh) * 2021-01-15 2022-07-15 深圳市旺盈彩盒纸品有限公司 一种纸板印刷装置及其印刷方法
CN113370646A (zh) * 2021-04-27 2021-09-10 安徽天元塑业有限公司 一种水泥包装袋连续刻印装置
CN113370646B (zh) * 2021-04-27 2023-09-19 安徽天元塑业有限公司 一种水泥包装袋连续刻印装置

Also Published As

Publication number Publication date
ITAP20020005A1 (it) 2002-08-19
DE60309773D1 (de) 2007-01-04
EP1364783B1 (fr) 2006-11-22
DE60309773T2 (de) 2007-10-11
ATE345931T1 (de) 2006-12-15
CY1107340T1 (el) 2012-12-19
EP1364783A3 (fr) 2004-12-15
PT1364783E (pt) 2007-02-28
DK1364783T3 (da) 2007-04-02
SI1364783T1 (sl) 2007-04-30
ES2255891T1 (es) 2006-07-16
ES2255891T3 (es) 2007-05-16

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