EP1717030A2 - Dispositif d'impression sur des pièces planes - Google Patents

Dispositif d'impression sur des pièces planes Download PDF

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Publication number
EP1717030A2
EP1717030A2 EP06005141A EP06005141A EP1717030A2 EP 1717030 A2 EP1717030 A2 EP 1717030A2 EP 06005141 A EP06005141 A EP 06005141A EP 06005141 A EP06005141 A EP 06005141A EP 1717030 A2 EP1717030 A2 EP 1717030A2
Authority
EP
European Patent Office
Prior art keywords
printing unit
lateral guide
workpiece
workpieces
printing
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
EP06005141A
Other languages
German (de)
English (en)
Other versions
EP1717030A3 (fr
EP1717030B1 (fr
Inventor
Sascha Lämmle
Michael Poitinger
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.)
Robert Buerkle GmbH
Original Assignee
Robert Buerkle 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 Robert Buerkle GmbH filed Critical Robert Buerkle GmbH
Publication of EP1717030A2 publication Critical patent/EP1717030A2/fr
Publication of EP1717030A3 publication Critical patent/EP1717030A3/fr
Application granted granted Critical
Publication of EP1717030B1 publication Critical patent/EP1717030B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0081—Devices for scanning register marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/06—Movable stops or gauges, e.g. rising and falling front stops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/36—Positioning; Changing position
    • B65H2301/361—Positioning; Changing position during displacement
    • B65H2301/3613—Lateral positioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/511—Processing surface of handled material upon transport or guiding thereof, e.g. cleaning
    • B65H2301/5111—Printing; Marking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/70—Other elements in edge contact with handled material, e.g. registering, orientating, guiding devices
    • B65H2404/72—Stops, gauge pins, e.g. stationary
    • B65H2404/722—Stops, gauge pins, e.g. stationary movable in operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/50—Timing
    • B65H2513/51—Sequence of process

Definitions

  • the invention accordingly relates to a device for transporting the workpieces and at least one printing unit in which an applicator roll rolls on the workpieces transported through the printing unit and in this case a printed image on the workpiece surface applies.
  • the transport device is provided with a lateral guide for the workpieces on which the same are transported through the printing unit.
  • the applicator roll may be formed as a printing cylinder or as a transfer roller for the transfer of ink from a printing cylinder, such as a gravure cylinder, on the workpiece surface, while usually a counter roll is present, which cooperatively forms a pressure nip with the applicator roll.
  • a printing cylinder such as a gravure cylinder
  • a device of the type mentioned, which solves the problems just described with excellent results, is from the DE 103 33 626 A1 known.
  • the printed image is automatically evaluated by an image processing device, whether the print image position and the print image length are within the specified tolerances or not.
  • the results obtained act on the drives of the transport device and / or the drives of the cylinders involved in the printing in order to influence the print image position or the print image length if necessary in the direction of smaller tolerances. It is therefore a control loop that performs a correction during production, in particular by accelerating or decelerating individual or all involved in the pressure cylinder and / or the transport device.
  • the present invention is therefore based on the object to enable automatic monitoring and, where appropriate, control of the exact print image positioning even during production, when the workpieces are printed over the entire surface.
  • the device for printing flat workpieces according to the present invention in which the workpieces are transported by means of a transport device with lateral guidance through the printing unit, in which an applicator roll applies a print image on the workpiece surface, according to the invention thus provided with a lateral guide, the sections motor is adjustable between a neutral position and a test position.
  • the invention can be used during ongoing production, namely by a control for the lateral guide is present, which adjusts the lateral guidance, if necessary, such sections that a certain workpiece from a series of located on the conveyor workpieces successively to each in the test position adjusted portions of the lateral guide comes to rest and is thereby transported laterally offset by the printing unit, while the remaining workpieces rest against the located in the neutral position sections of the lateral guide and insofar continue the production seamlessly.
  • the controller can then be programmed, for example, so that every hundredth workpiece as a sample laterally offset by the printing unit or the multiple printing units runs to continuously monitor the production quality and possibly intervene regulating.
  • the printing unit prints printed image position markings on the side beyond the neutral position of the lateral guide edge - the test edge - the workpiece surface of the laterally offset in the test position workpiece while behind the printing unit a detection device for detecting the printed image position markings is arranged.
  • the detection device it is expedient for the detection device to interact with the controller in such a way that the control changes the neutral position of the lateral guide if necessary in order to correct lateral print image shifts.
  • the detection device may also cooperate with the controller in such a way that, if necessary, it axially displaces the printing cylinder in order to correct lateral print image displacements.
  • the controller may also cooperate with the controller in such a way that, if necessary, it axially displaces the printing cylinder in order to correct lateral print image displacements.
  • the axial displacement of the printing cylinder and the entire printing unit or other individual components of the same can be moved laterally.
  • the detection device can be equipped with an optical sensor, which may in particular be a digital camera.
  • an optical sensor which may in particular be a digital camera.
  • print images and registration marks can be digitally resolved not only according to their structure but also according to their color.
  • the optical sensor is arranged vertically adjustable, so that the surface of the printed workpiece is always reliably in the focus of the optical sensor.
  • a control station is present in the apparatus according to the invention, which controls the drives of the printing units, the drives of the transport device and the drives of the lateral guide and also controls, in response to the signals of the detection device.
  • a front and a rear color lights are applied, each of which a registration mark is printed by a respective printing unit.
  • the detection device can then visually check the storage accuracy of the individual registration marks and thereby recognize the correctness of the print image position in the transport direction, the print image position in the transverse direction and by comparing the two Farbampein the print image length.
  • the control center then controls the corresponding drives in such a way that the print image position or the print image length into the tolerance values.
  • This may, as from the DE 103 33 626 A1 basically known, by accelerating or decelerating one or more drives in the printing unit and / or by accelerating or decelerating the transport device before the printing unit and / or by changing the neutral position of the lateral guide and / or by axial adjustment of cylinders involved in the pressure of the printing unit , A correction of the print image length can be done by selectively generating a slip between the image-bearing cylinders of the printing unit or the applicator roll and the workpiece surface.
  • the printed image position with respect to the beginning can then in the from DE 103 33 626 A1 known manner be made by sensors that detect the front edge of the workpiece before the respective printing unit, which coincides with the full-area printing with the repeat position, and keep targeted by accelerating or decelerating the transport device and / or the printing image start the print image within very narrow tolerances.
  • FIG. 1 for a device comprises a diagonal roller track 1, a belt conveyor 2, a printing unit 3 with an applicator roller 4 and a gravure roller 5 and a roller conveyor 6, which are arranged in line one behind the other and each have sections of a lateral guide 7 ,
  • the lateral guide 7 consists in the present case each of a vertically arranged conveyor belt.
  • three to five printing units between the printing unit 3 and the roller conveyor 6 shown here will be present at the outlet of the production line in order to apply multicolour printing to continuous workpieces 8.
  • only one printing unit 3 is shown here.
  • the printing unit 3 consists not only of the application roller 4 and the gravure roller 5; below the applicator roll 4 (not visible here) counter-roller is provided to form a pressure nip, while a conveyor belt 16 ensures as possible slip-free transport of the workpiece 8 along the applicator roller 4 rolling thereon.
  • workpieces 8 of wood-based material have thickness tolerances that normally do not allow direct pressure with a printing cylinder.
  • the applicator roller 4 of the present invention is formed as a transfer roller made of a rubberized steel roller whose rubber peripheral surface has been ground smooth.
  • the printed image is accordingly removed from the gravure cylinder 5, which has depressions which fill in the inking unit (not shown) with ink and subsequently deliver it to the applicator roll 4.
  • the application roller 4 is thus during the pressure in simultaneous contact with the gravure cylinder 5 and the surface of the workpiece 8, while it takes over the printed image from the gravure cylinder 5 and transmits to the workpiece 8.
  • the workpieces 8 are printed laterally aligned exactly, they are subjected to a lateral force during transport through the device, which presses them against the lateral guide 7 and ensures that the workpieces 8 are printed adjacent to the lateral guide 7.
  • this is done via the inclined roller conveyor 1, which also allows larger lateral movements of the workpieces 8 to the side guide 7 out, while the belt conveyor 2, a conveyor belt 9 is combined with overlying rollers 10, which exert the lateral force on the workpiece 8 ,
  • a slight entanglement of the applicator roll 4 to the (not visible) counter roll for a force component to the side guide 7 provides.
  • the belt conveyor 2 is used in the present production line for coarse adjustment of the printed image position, ie it ensures a synchronization of the angular position of the gravure roller 5 with the front edge of the workpiece 8.
  • a flow sensor 11 is provided which detects the leading edge of the workpiece 8, while the conveyor belt is moved back and forth independently of the remaining transport devices 1, 16, 6.
  • By demand braking, acceleration or even backward movement of the conveyor belt 9 is thus ensured that the workpiece 8 is delivered synchronized to the angular position of the gravure roller 5 to the printing unit 3, so that the beginning of the located on the gravure roller 5 and transferred to the application roller 4 print image coincides approximately with the leading edge of the workpiece 8.
  • a print image position sensor 12 in the printing unit 3, disposed immediately in front of the application roller 4, is used for fine adjustment of the print image beginning in the from DE 103 33 626 A1 known procedure. If the angular position of the gravure roller 5 is not so exact with the timing at which the leading edge of the Workpiece 8 the printed image position sensor 12 happens to be synchronized to superimpose the print image start exactly with the leading edge of the workpiece 8, the conveyor belt 16 is decelerated or accelerated, and additionally or alternatively, the application roller and the gravure roller 5 are decelerated or accelerated to a to ensure exact match and thus an exact repeat at the beginning edge of the workpiece 8.
  • the lateral guide 7 is adjustable in sections, which is shown in Fig. 2.
  • a randomly selected workpiece 8 is guided straight laterally offset by the printing unit 3 by the located on the printing unit 3 section of the lateral guide 7 has been adjusted laterally from a neutral position 14 in a test position 15.
  • the other portions of the lateral guide 7 are still in the neutral position 14, so that the other in-line workpieces 8 continue to be printed and processed normally.
  • Figures 3 and 4 show a schematic view of the printing unit 3 in the direction of travel, so that here in addition to the applicator roll 4 and the gravure roll 5 and a counter roll 17 is visible, which forms a pressure nip together with the applicator roll 4, through which the workpiece 8 on the Conveyor belt 16 is guided resting.
  • FIG. 3 shows the workpiece 8 in the lateral neutral position 14, while FIG. 4 shows the workpiece 8 in the laterally offset test position 15.
  • the applicator roll 4, the gravure cylinder 5 and the counter roll 17 are each provided with its own drive. To increase the accuracy of the image on the workpiece surface and to avoid unwanted image distortion of the drive of the backing roll 17, however, a lower torque than that of the applicator roll 4. This ensures the greatest possible slip of the unwinding of the applicator roll 4 on the workpiece 8.
  • the drives can be regulated in order to produce a specific "counter slip", depending on the image distortions or image length tolerances detected by the camera 13, in order to eliminate the disturbance and keep the print image length as close as possible to a 1: 1 image.
  • the printing unit 3 as a whole, or individual components such as in particular the gravure roll 5 may be arranged axially adjustable.
  • a correction of a lateral print image position deviation can also be effected by changing the neutral position 14 of the lateral guide 7.
  • Figure 5 shows schematically a printed workpiece 8, the side offset in the test position 15 by the present embodiment of the invention has been conducted. Accordingly, the printed image 18 is offset laterally, and a test edge 19 remains free, wherein the test edge 19, a first color ramp 20 with four registration marks and a second color ramp 21 is also applied with four registration marks. In the present case, therefore, there was a four-color printing with a total of four printing units 3. By comparing the two color lights 20 and 21, the correct print image length can be recognized separately for each color.
  • FIGS. 6 and 7 the color traffic light 21 is shown, specifically in FIG. 6, with registration marks 22, 23, 24 and 25, which each lie exactly within the predetermined tolerances, while FIG. 7 indicates the need for correction:
  • the registration mark 22 for the first printing unit 3 shows a too short print image 18.
  • the registration mark 23 is within the predetermined tolerance, so that it follows that the second printing unit works exactly.
  • the registration mark 24 for the third printing unit shows a need for correction both in the print image length (this is too long) and in the lateral print image position. The same applies to the registration mark 25 for the fourth printing unit.
  • the color lights or registration marks are detected and evaluated by the camera 13 at the outlet of the printing line, so that an automatic correction of the corresponding printing units by means of rules of the drives and the other adjustment in the context of a tendency correction on the subsequent workpieces 8 effects.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Registering Or Overturning Sheets (AREA)
EP20060005141 2005-04-28 2006-03-14 Dispositif d'impression sur des pièces planes Active EP1717030B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510020213 DE102005020213A1 (de) 2005-04-28 2005-04-28 Vorrichtung zum Bedrucken von flächigen Werkstücken

Publications (3)

Publication Number Publication Date
EP1717030A2 true EP1717030A2 (fr) 2006-11-02
EP1717030A3 EP1717030A3 (fr) 2007-04-04
EP1717030B1 EP1717030B1 (fr) 2008-05-14

Family

ID=36869963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060005141 Active EP1717030B1 (fr) 2005-04-28 2006-03-14 Dispositif d'impression sur des pièces planes

Country Status (3)

Country Link
EP (1) EP1717030B1 (fr)
DE (2) DE102005020213A1 (fr)
ES (1) ES2303704T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009013580A2 (fr) 2007-07-26 2009-01-29 Flooring Industries Limited, Sarl Procédés pprocédés de fabrication de panneaux, et panneau
WO2014009940A1 (fr) * 2012-07-12 2014-01-16 Hewlett-Pachard Industrial Printing Ltd. Dispositif pour recevoir et transmettre un substrat

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007021787B4 (de) * 2007-05-07 2010-08-19 Wemhöner Surface Technologies GmbH & Co. KG Verfahren zur Steuerung einer Druckmaschine
DE102008045402A1 (de) * 2008-09-02 2010-03-04 Fischer & Krecke Gmbh Verfahren zum Betrieb einer Zentralzylinder-Druckmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10333626A1 (de) 2003-07-24 2005-02-17 Robert Bürkle GmbH Vorrichtung zum Bedrucken von flächigen Werkstücken

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5689541A (en) * 1979-12-05 1981-07-20 Rengo Co Ltd Method and device for guiding one side corrugated cardboard
DE20006554U1 (de) * 2000-04-08 2001-08-16 Web Tech Licensees B V Vorrichtung zur Bearbeitung von bedruckten Verpackungen o.dgl. Substraten
KR100798314B1 (ko) * 2001-12-28 2008-01-28 엘지.필립스 엘시디 주식회사 기판의 변동에 의한 패턴의 오정렬이 보상된 패턴형성용잉크인쇄장치 및 이를 이용한 패턴형성방법

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10333626A1 (de) 2003-07-24 2005-02-17 Robert Bürkle GmbH Vorrichtung zum Bedrucken von flächigen Werkstücken

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009013580A2 (fr) 2007-07-26 2009-01-29 Flooring Industries Limited, Sarl Procédés pprocédés de fabrication de panneaux, et panneau
US9290040B2 (en) 2007-07-26 2016-03-22 Flooring Industries Limited, Sarl Methods for manufacturing panels and panel
WO2014009940A1 (fr) * 2012-07-12 2014-01-16 Hewlett-Pachard Industrial Printing Ltd. Dispositif pour recevoir et transmettre un substrat
US9745161B2 (en) 2012-07-12 2017-08-29 Hewlett-Packard Industrial Printing Ltd. Device for receiving and submitting a substrate

Also Published As

Publication number Publication date
EP1717030A3 (fr) 2007-04-04
EP1717030B1 (fr) 2008-05-14
ES2303704T3 (es) 2008-08-16
DE102005020213A1 (de) 2006-11-09
DE502006000761D1 (de) 2008-06-26

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