EP2718108B1 - Methode d'impression d'objets et machine d'impression - Google Patents

Methode d'impression d'objets et machine d'impression Download PDF

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Publication number
EP2718108B1
EP2718108B1 EP12719720.0A EP12719720A EP2718108B1 EP 2718108 B1 EP2718108 B1 EP 2718108B1 EP 12719720 A EP12719720 A EP 12719720A EP 2718108 B1 EP2718108 B1 EP 2718108B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
printing
conveying
speed
workpieces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12719720.0A
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German (de)
English (en)
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EP2718108A1 (fr
Inventor
Rene Pankoke
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.)
Hymmen GmbH Maschinen und Anlagenbau
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Hymmen GmbH Maschinen und Anlagenbau
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Publication of EP2718108A1 publication Critical patent/EP2718108A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/14—Aprons or guides for the printing section
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/008—Controlling printhead for accurately positioning print image on printing material, e.g. with the intention to control the width of margins
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0085—Using suction for maintaining printing material flat
    • 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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material

Definitions

  • the present invention relates to a method for printing on workpieces and to a printing device.
  • the multipass method In the digital printing of workpieces, in particular panels made of wood-based materials, a distinction is made today between the "multipass” method and the “single-pass” method.
  • the multipass method the workpiece is at rest while the one or more digital printheads reciprocate over the workpiece. Subsequently, the workpiece advances again for a portion of a printhead width, comes to rest again, and the printing operation with the movement of the printheads is repeated; This process is repeated until complete printing of the workpiece.
  • a printhead having a predetermined frequency of, for example, 7 kHz will emit droplets and a conveying device suitable for this purpose will convey the workpiece to be printed at a speed below the printheads which produces the desired distance from one droplet to the next.
  • the WO 2005/009735 discloses a device for printing plates, wherein the promotion of the plates takes place via a plurality of driven rollers.
  • the DE 10 2006 038 750A1 discloses a device for printing on workpieces, which comprises a printing station, in which the workpiece is fixed during the printing process, and having a relative to the printing station movable printing device with Farbéess instituten.
  • JP 2000203003 In the JP 2000203003 is shown a printing device for strip-shaped plates, which are fixed on the edge of blocks on pins. The blocks are then moved along the guides for printing.
  • the present invention solves this task with a method having the features of claim 1 and a printing device with the features of claim 3 solved.
  • the printer can compensate for the slower transport movement by proportionally slowing down the print speed. Conversely, with a faster transport movement of the workpieces and the printing speed can be increased proportionally, so that as a result, even with changes in the speed of the workpieces an optimal print image with high quality is obtained.
  • the printing device comprises stationary digital printing heads during the printing process, under which at least one workpiece to be printed is continuously moved during the printing process, wherein a detection device is provided for detecting the conveying speed of the workpiece to be printed or a conveying device connected thereto wherein an electronic control device processes the data of the detection device and by means of the data, the printing speed of the print heads is controllable.
  • the workpiece carriers are preferably guided along a guide device at least in the region of the printer.
  • the workpieces conveyed one behind the other can also be guided and printed with high precision transversely to the feed direction, so that a particularly high print quality is achieved.
  • the problems mentioned above with the printing of the edges or white stripes are avoided at the edges.
  • the guide device preferably comprises a linear rail aligned with its longitudinal axis parallel to the conveying direction.
  • one or more ball-bearing rollers may be attached to the workpiece carriers, which are supported on the at least one linear rail, so that a high-precision guidance is obtained. Due to the high-precision guidance, certain parts of the printed image can be placed exactly on the workpiece. In addition, a particularly high printing speed and capacity, for example, more than 1,500 m 2 per hour can be achieved by the stationary printheads arranged.
  • the workpiece carriers comprise a transverse bar whose longitudinal axis extends substantially perpendicular to the conveying direction.
  • fastening means preferably suction elements for the fixation of the workpieces can be provided.
  • a detection device for detecting the position of the workpieces on the workpiece carriers it is possible to control the printer depending on the speed of the workpieces, whereby the print quality can be further increased. As a result, movement tolerances of the conveyor can be compensated.
  • a plate-shaped workpiece 4 is to be transported in a feed direction 1.
  • the plane perpendicular to the feed direction is defined by a horizontal axis 2 perpendicular to the feed direction and a vertical axis 3.
  • workpieces 4 for example, coated chipboard with dimensions of about 300 mm to 1,500 mm width, 400 mm to about 3,000 mm in length and 2 mm to about 60 mm thickness digitally with a decorative image. As decor images woodgrains, tile patterns, photos or other graphic elements can be used.
  • the chipboard (workpieces) are provided on an upstream conventional belt transport continuously at a feed rate of 15 to 25 m / min and a gap of one plate length between each two chipboard. Higher speeds are possible.
  • workpieces 4 for example, metal, plastic, wood, cardboard, paper or other materials are printed.
  • a conveyor is shown without the overlying printer, especially the digital printer.
  • the conveying device comprises electric direct drives 5 and 5 'which each drive a toothed belt pulleys. Both toothed pulleys each drive a circulating toothed belt 10.
  • the two parallel guided toothed belt 10 are connected to a plurality of workpiece carriers 7, which are moved together with the toothed belt 10 circumferentially in the manner of a conveyor belt.
  • the encircling workpiece carriers 7 are designed as metallic beams or steel cross members, which are fastened to the peripheral toothed belt 10 at the edge.
  • each workpiece carrier 7 On the upper side of each workpiece carrier 7, a plurality of fastening means 12 in the form of suction elements are provided which suck in vacuum deposited on the fastening means plate-shaped workpieces 4 and fix it to the workpiece carriers 7.
  • workpiece carrier 7 designed as hollow sections workpiece carrier 7 are connected to vacuum generating units 6, which generate within a frame structure 60 and along channels a negative pressure, which is then fed via openings or slots on the timing belt 10 in the fastening means 12 to fix the workpieces 4.
  • the negative pressure on the fastening means 12 is applied only over part of the upper path of the workpiece carrier 7, so that already printed workpieces 4 are released at the end of the conveyor.
  • suction elements shown instead of the suction elements shown to use mechanical or magnetic fastening means for fixing the workpieces 4.
  • the guide rail 8 is fixed on a longitudinal support 80 which is aligned in the conveying direction and which is designed as a steel profile and is fixed to a frame of the conveying device.
  • a longitudinal support 80 which is aligned in the conveying direction and which is designed as a steel profile and is fixed to a frame of the conveying device.
  • lateral guide rollers 20 which are rotatably mounted about a vertical axis.
  • Each guide roller 20 can be pressed against the guide rail 8 with a certain bias.
  • the bearing of the guide rollers 20 can be adjusted horizontally and perpendicular to the conveying direction, so that each workpiece carrier 7 is guided in the horizontal direction on the guide rail 8.
  • rails 22 are mounted on the frame of the conveyor on opposite sides of the guide rail 8. At the bottom of each rail 22, a roller 21 is guided, which is rotatably mounted on a vertical roller holder 23.
  • the vertical roller holder 23 is fixed to the workpiece carrier 7 and can be designed to be adjustable in length in order to be able to position the workpiece carriers 7 in the vertical direction.
  • the guide rollers 20, the rollers 21, the guide rail 8 and the rails 22 are preferably made of metal, in particular steel.
  • the guide rail 8 and the rails 22 are provided in the region of the raceways of the guide rollers 20 and, respectively, the rollers 21 with machined flat surfaces for an exact guidance.
  • the guide rail 8 and the rails 22 are made of hardened steel, for example, and are aligned with high precision with a tolerance of less than 0.01 mm transversely to the feed direction.
  • the workpiece carrier 7 are fixed, which have centrally on its underside ball-bearing guide rollers 20 and side rollers 21, which thread on the frame of the conveyor fixed guide rail 8 and the rails 22.
  • the individual workpiece carriers 7 are pulled to the right and left of the two toothed belts 10 and are supported on the guide rail 8 and the rails 22 via the ball-mounted guide rollers 20 and rollers 21 fastened below, so that they are transverse to the feed direction be performed with high precision with a tolerance of less than 0.01 mm.
  • the toothed belts 10 on the right and left of the conveyor are driven by a toothed wheel with rounded edges to prevent a fluctuation of the transport speed (prevention of the "polygon effect").
  • the two toothed belts 10 each have their own electric direct drive 5 or 5 ', which is flanged to the toothed belt pulley.
  • the toothed belt pulley preferably has a diameter of more than 400 mm.
  • At the end of the transport path there is a deflection roller 32 for each toothed belt 10, in which the payment belts 10 are deflected and are conveyed back again on the rear side below the transport path.
  • the workpiece carriers 7 run at the end of the transport path first at a slight angle of about 10 ° down, the ball-bearing central guide rollers 20 disengage from the end beveled guide rail 8, and are then taken by the timing belt 10 right and left of the transport route and returned below the transport route again.
  • the negative pressure or the vacuum in the suction elements is transmitted through a rail-shaped opening in the conveyor through the toothed belt 10 into the workpiece carrier 7.
  • the individual suction elements are equipped with correspondingly small openings, so that even for the suction elements, which are not occupied by a workpiece 4, only a small outflow of air goes through, which does not cause the vacuum to collapse. Problems with so-called false air are thus excluded.
  • a printer 14 is mounted, which is designed as a digital printer and prints in the single-pass process workpieces 4, which are conveyed via the conveyor.
  • the workpieces 4 are guided so that they are performed exactly at the predetermined vertical distance to print heads 15 of the printer 14 and exactly laterally in the track under the print heads 15 during the printing process continuously at a constant speed.
  • a detection device for the current position of the workpieces 4 may be provided, for example, seen for detecting a leading edge of the workpiece for detecting the start of printing and a printing end of a printed image in the conveying direction.
  • the detection device may include, for example, a mounted on the workpiece carriers 7 tracking magnetic strip, which from a fixed sensor with high frequency of z. B. 10 kHz is sampled.
  • the detection device by a very precise friction wheel on one of the timing belt or by other z. B. optical cameras or laser light barriers can be realized.
  • the printer 14 can compensate for the slower transport movement by proportionally slowing down the print speed. Conversely, with a faster transport movement of the workpieces 4, the printing speed can be increased proportionally, so that as a result, even with changes in the speed of the workpieces 4, an optimum print image with high quality is obtained.
  • the detection device for detecting the conveying speed of the workpiece 4 to be printed is arranged in the area of the printer 14, preferably below the printer 14, so that the conveying speed of the workpieces 4 in this area is measured. Deviations in the conveying speed are passed on to an electronic control device, which processes the data and then controls the printing speed of the individual print heads 15.
  • one or more drying stations for the printed workpieces 4 may be provided depending on the type of printing ink used.
  • the workpiece carriers can be made larger, so that a workpiece 4 can be received by a single workpiece carrier 7.
  • the workpiece carriers 7 also do not have to run back on a toothed belt 10 below the transport device, but can run back laterally on the same plane of the transport device.
  • the possible forms of expression of the workpiece carrier 7 and the fastening means are varied, depending on the requirements of the given workpieces 4. For smaller workpieces, the manifestation of the workpiece carrier 7 will be correspondingly smaller, so that the workpieces 4 are securely attached and not in the interstices of the workpiece carrier through fall or come inaccurately to lie down.
  • the leadership of the workpiece carrier 7 can also be done via a guide device with at least one rail on which fixed to the workpiece carriers 7 sliding elements are performed. This can be dispensed with the ball-bearing rollers.

Landscapes

  • Ink Jet (AREA)
  • Handling Of Sheets (AREA)

Claims (11)

  1. Procédé d'impression de pièces (4) en forme de plaque comprenant les étapes consistant à :
    - transférer une pièce (4) vers au moins un porte-pièce rotatif (7), des moyens de fixation mécaniques ou magnétiques ou des moyens de fixation (12) réalisés sous la forme d'éléments d'aspiration étant montés sur la face supérieure du porte-pièce (7),
    - fixer la pièce (4) du porte pièce (7),
    - transporter la pièce (4) fixée sur le porte pièce (7) vers une imprimante numérique (14) et imprimer la pièce (4) selon un procédé à une seule passe, les portes pièce (7) étant guidés au moins dans la zone de l'imprimante (14) le long d'un dispositif de guidage (8),
    - détecter la vitesse de transport de la pièce (4) fixée sur le porte-pièce (7),
    - commander la vitesse d'impression en fonction de la vitesse de transport détectée.
  2. Procédé conforme à la revendication 1,
    caractérisé en ce qu'
    en présence d'une modification de la vitesse d'alimentation de la pièce (4), la vitesse d'impression de l'imprimante (14) est adaptée de manière proportionnelle.
  3. Dispositif d'impression comprenant des têtes d'impression numériques (15) stationnaires pendant le processus d'impression, à une distance prédéfinie au-dessous desquelles, au moins une pièce (4) en forme de plaque à imprimer est déplacée en continu dans une direction de transport pendant le processus d'impression selon un procédé à une seule passe, sur la face supérieure d'un porte-pièce (7) étant montés des moyens de fixation mécanique ou magnétique ou des moyens de fixation (12) réalisés sous la forme d'éléments d'aspiration, et les portes pièce (7) comprenant une poutre transversale (7) dont l'axe longitudinal s'étend essentiellement perpendiculairement à la direction de transport, et étant guidés au moins dans la zone de l'imprimante (14) le long d'un dispositif de guidage (8), un dispositif de détection permettant la détection de la vitesse de transport des pièces (4) à imprimer ou d'un dispositif de transport lié à celles-ci étant prévu, un dispositif de commande électronique traitant les données du dispositif de détection et la vitesse d'impression des têtes d'impression (15) pouvant être commandées par l'intermédiaire de ces données.
  4. Dispositif d'impression conforme à la revendication 3,
    caractérisé en ce que
    le dispositif de transport des pièces (4) comprend une bande transporteuse (10) et le dispositif de détection électronique comprend un galet de friction s'appliquant sur cette bande transporteuse (10).
  5. Dispositif d'impression conforme à la revendication 3 ou 4,
    caractérisé en ce que
    les têtes d'impression numériques (15) sont montées sur la totalité de la largeur de la pièce (4) et au moins quatre rangées de têtes d'impression sont prévues les unes derrière les autres pour trois couleurs d'impression différentes.
  6. Dispositif d'impression conforme à l'une des revendications précédentes 3 à 5,
    caractérisé en ce que
    la position actuelle de la pièce (4) est détectée par l'intermédiaire d'un encodeur qui est relié directement ou indirectement au dispositif de transport en continu de la pièce.
  7. Dispositif d'impression conforme à l'une des revendications précédentes 3 à 6,
    caractérisé en ce qu'
    en tant que têtes d'impression stationnaires (15) on utilise des têtes d'impression à jet d'encre à commande piézoélectronique qui délivrent avec une fréquence comprise entre 1 kHz et 10 kHz des gouttes individuelles sur la pièce se déplaçant en continu.
  8. Dispositif d'impression conforme à l'une des revendications précédentes 3 à 7,
    caractérisé en ce que
    le dispositif de guidage (8) comprend un rail linéaire orienté parallèlement à la direction de transport par son axe longitudinal.
  9. Dispositif d'impression conforme à la revendication 8,
    caractérisé en ce que
    sur les supports de pièce (7) sont fixés un ou plusieurs galet(s) monté(s) sur billes qui s'appuient sur le rail linéaire.
  10. Dispositif d'impression conforme à l'une des revendications précédentes 3 à 9,
    caractérisé en ce que
    les portes pièce rotatifs (7) sont réalisés sous la forme de poutres métalliques ou de traverses en acier qui sont fixés sur leurs bords à des courroies crantées rotatives (10).
  11. Dispositif d'impression conforme à l'une des revendications précédentes 3 à 10,
    caractérisé en ce que
    le dispositif de transport comprend des organes d'entraînement électriques directs (5, 5') qui entraînent respectivement une poulie de courroie crantée et les deux poulies de courroie crantée entraînent chacune une courroie crantée rotative (10).
EP12719720.0A 2011-06-10 2012-05-09 Methode d'impression d'objets et machine d'impression Active EP2718108B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110106135 DE102011106135B4 (de) 2011-06-10 2011-06-10 Druckvorrichtung zum Bedrucken von plattenförmigen Werkstücken
PCT/EP2012/058518 WO2012168020A1 (fr) 2011-06-10 2012-05-09 Procédé d'impression de pièces à travailler et dispositif d'impression

Publications (2)

Publication Number Publication Date
EP2718108A1 EP2718108A1 (fr) 2014-04-16
EP2718108B1 true EP2718108B1 (fr) 2016-08-17

Family

ID=46046215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12719720.0A Active EP2718108B1 (fr) 2011-06-10 2012-05-09 Methode d'impression d'objets et machine d'impression

Country Status (5)

Country Link
EP (1) EP2718108B1 (fr)
DE (1) DE102011106135B4 (fr)
ES (1) ES2603647T3 (fr)
PL (1) PL2718108T3 (fr)
WO (1) WO2012168020A1 (fr)

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IL228964B (en) * 2013-10-20 2019-07-31 Matan Digital Printing Ltd A printer with three modes
DE102015203424A1 (de) 2015-02-26 2016-09-01 Kba-Metalprint Gmbh Vorrichtung zum Bearbeiten eines Substrates
DE102015203423B4 (de) 2015-02-26 2020-05-07 Kba-Metalprint Gmbh Fördereinrichtung mit einem endlosen Lastenträger
DE102015007325A1 (de) * 2015-06-12 2016-12-15 Durst Phototechnik Digital Technology Gmbh Transportsystem für einen Tintenstrahldrucker
DE102017110300A1 (de) * 2017-05-11 2018-06-21 Atlantic Zeiser Gmbh Vorrichtung zum Fördern von Objekten durch eine Bearbeitungsstation
DE102017211647A1 (de) * 2017-07-07 2019-01-10 Heidelberger Druckmaschinen Ag Vorrichtung zum Transport von zu bedruckenden Objekten
EP3715008B1 (fr) * 2019-03-28 2024-04-24 apilion machines + services GmbH Dispositif de convoyage destiné à transporter des barres métalliques
AT522336B1 (de) * 2019-08-30 2020-10-15 Franz Neuhofer Vorrichtung zum digitalen Bedrucken einer Profilleiste
CN111923607A (zh) * 2020-07-02 2020-11-13 深圳鹏渤信息科技有限公司 一种基于物联网的物件条码生成设备
CN112520398B (zh) * 2020-12-11 2022-03-01 湖南翰坤实业有限公司 一种uv打印机

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JP2000203003A (ja) * 1999-01-12 2000-07-25 Takeuchi Seisakusho:Kk 卒塔婆の印字装置
DE102006038750A1 (de) * 2006-08-17 2008-02-21 Robert Bürkle GmbH Vorrichtung zum Bedrucken von starren Werkstücken
CN201501166U (zh) * 2009-09-25 2010-06-09 詹洪明 平板喷绘机专用吸盘吸附型真空平台
DE102009003443A1 (de) * 2009-02-05 2010-08-19 Theodor Hymmen Holding Gmbh Verfahren und Vorrichtung zum Bedrucken großformatiger Werkstücke

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JP2000203003A (ja) * 1999-01-12 2000-07-25 Takeuchi Seisakusho:Kk 卒塔婆の印字装置
DE102006038750A1 (de) * 2006-08-17 2008-02-21 Robert Bürkle GmbH Vorrichtung zum Bedrucken von starren Werkstücken
DE102009003443A1 (de) * 2009-02-05 2010-08-19 Theodor Hymmen Holding Gmbh Verfahren und Vorrichtung zum Bedrucken großformatiger Werkstücke
CN201501166U (zh) * 2009-09-25 2010-06-09 詹洪明 平板喷绘机专用吸盘吸附型真空平台

Also Published As

Publication number Publication date
WO2012168020A1 (fr) 2012-12-13
DE102011106135A1 (de) 2012-12-13
ES2603647T3 (es) 2017-02-28
EP2718108A1 (fr) 2014-04-16
PL2718108T3 (pl) 2017-02-28
DE102011106135B4 (de) 2015-01-22

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