EP2285720B1 - Machine d'impression-gaufrage à plat pourvue d'un dispositif de guidage de feuilles continues - Google Patents

Machine d'impression-gaufrage à plat pourvue d'un dispositif de guidage de feuilles continues Download PDF

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Publication number
EP2285720B1
EP2285720B1 EP09753403.6A EP09753403A EP2285720B1 EP 2285720 B1 EP2285720 B1 EP 2285720B1 EP 09753403 A EP09753403 A EP 09753403A EP 2285720 B1 EP2285720 B1 EP 2285720B1
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EP
European Patent Office
Prior art keywords
foil
flat bed
embossing machine
machine according
web
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
EP09753403.6A
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German (de)
English (en)
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EP2285720A1 (fr
Inventor
Marc Günther BRENDLE
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.)
Gietz AG
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Gietz AG
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Publication of EP2285720A1 publication Critical patent/EP2285720A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle
    • B65H23/10—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle acting on running web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • B65H23/1882—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling longitudinal register of web
    • B65H23/1884—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling longitudinal register of web with step-by-step advancement
    • 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
    • B65H2301/512—Changing form of handled material
    • B65H2301/5126—Embossing, crimping or similar processes

Definitions

  • the invention relates to a flat embossing machine with a film web guiding device for a plurality of film webs, which are guided by unwinding rollers on a stamping plate of a flatbed press according to the preamble of claim 1.
  • flat embossing printing machines such as in the EP 0 858 888
  • Particularly high embossing performances can be carried out in the best quality and also for demanding embossing tasks.
  • these flat embossing machines also place particularly high demands on the guidance and precise preference of the thin and very sensitive embossed foil webs, with layer thicknesses of, for example, only 12-20 ⁇ m (0.02 mm).
  • film webs of different types must at the same time be smoothly guided and conveyed smoothly.
  • the film guide must be perfectly flat and properly positioned without distortion, hull formation, wrinkles and dislocations. And the rapid, intermittent preference in a short time must be performed optimally gentle, in order to achieve high performance and quality.
  • Such a flat embossing machine and film web guide is for example from the EP 1 593 503 known.
  • This film web guide has for gentle, better adjustment of the tension in the film webs on a wide, flat suctioned brake and guide wall in front of the embossing table, with an adjustable negative pressure in the braking and guide wall, the tension of the film webs running over it can be regulated.
  • a flat embossing machine having a film web guiding device with a plurality of individual, controllable guide paths for the individual image film webs as film clamping devices in front of the embossing plate according to claim 1.
  • Fig. 1 and 2 show a flat embossing printing machine 1 according to the invention with a film web guide device 2 with several film webs 6.1- 6.4, which are guided by unwinding 7.1- 7.4 on a stamping plate 3 with Cliches 28 and a counter-pressure plate as embossing 8 on a flat bed press 4.
  • embossing 8 film images are impressed on a flat material 5, 5.1, 5.2.
  • the film web guide has for each film web after the embossing plate Folienvorzugs adopteden 9.1- 9.4 and before the embossing plate 3 individual, adjustable in the transverse direction Y to the preferred direction X, long, centrally symmetric trained guideways 11.1 - 11.4 as film clamping devices.
  • the individual guideways contain suction channels 16, 17 and have a smooth, low-friction surface 12 with suction openings 14, which are connected to controllable negative pressure sources 13.1 - 13.4 for independent adjustment of negative pressure pi and braking force zfi at each individual guideway 11i.
  • each image film web 6i each image mark sensor 15i on or between the film advancing device 9i and the guide rail 11i and adjustable, two-sided side guide elements 30 are assigned to low-friction deflecting 31, 32 directly in front of the guideways 11i and after the embossing plate 3, with which side guide elements 30, the image film webs 6i centered on the guideways 11i are feasible. In this way, each individual image film web can be optimally adjusted to the image marks in the X and Y directions while the machine is running, and image position errors can thereby be minimized.
  • each image film web 6i in the transverse direction Y is effected by adjusting the side guide elements 30 on low-friction deflecting elements 31, 32 directly in front of the guide tracks 11i and after the embossing point 8.
  • This centered guidance of the image film webs 6i on the correctly positioned, symmetrical long guide tracks 11 i until close to the embossing 8 prevents lateral deviations.
  • By means of the image mark sensors 15i in the error-free desired position is achieved by control and adjustment of the negative pressure pi in the guideways 11i. Error-free positioning in the X and Y directions can only be achieved by independently adjusting each individual film web 6i while the machine is running.
  • the image mark sensors 15i can preferably be arranged on the film advance devices 9i, in the center of the embossing plate 3 (on the cliché) or at the end of the guide paths 11i.
  • This elongation is effected over an embossing table length of e.g. 100 cm an extension of the film webs by 6 mm.
  • the cliches 28 are positioned on the embossing plate with optimum elongation ee or tensile stress z. If the tensile stresses zi (and thus the strains eei) in the individual image film webs 6i deviate from the nominal value, correspondingly large image position errors occur.
  • the film webs are fed from unwinding rolls 7 via a film store 20 (FIG. Fig. 1 ) guided to the guideways 11.
  • a film storage preferably vacuum loop memory 20, in particular horizontal vacuum double-loop memory used with negative pressure control, which eg from the EP 0 858 888 are known.
  • a first tensile stress za is exerted on the film webs for optimal guidance to the guideways 11.
  • These tensile stresses za vary in time and are very different for different film webs 6i (zai), depending on the type and width of film, loop length in the memory and Type of intermittent preference.
  • a well metered control of the braking force zfi on the film webs 11i and thus the optimum voltage zi at the embossing point 8 is achieved by a smooth, low-friction, abrasion-resistant surface 12 with constant coefficients of friction of the long guideways.
  • the surfaces 12 preferably have a minimum electrical conductivity, so that no electrostatic charging of the guideways 11 and the film webs 6 can arise.
  • Suitable surfaces 12 may consist, for example, of a layer of fluoropolymer plastic or of hard anodized aluminum with intercalated fluoropolymer (eg PTFE), for example in a layer thickness of, for example, 20-50 ⁇ m. These have relatively low and constant friction coefficients of, for example, 0.1-0.2.
  • PTFE intercalated fluoropolymer
  • these surfaces 12 exhibit as small differences as possible between static friction and sliding friction coefficients of the film webs of e.g. not more than 10 - 20% on the generation of uniform tensile stresses zfi.
  • Fig. 2 shows in more detail another example of a guide device 2 with four image film webs 6.1- 6.4 and with associated vacuum sources 13.1-13.4, which are designed here as controllable vacuum regulator 22.1- 22.4 and connected to a central suction fan 23.
  • film web tension sensors 40i can be arranged after the guideways 11i for determining the foil tensions, whereby the control of the vacuum sources 13i can be carried out as regulation to an adjustable desired value of the foil tension zi or the foil stretching ee.
  • the film web guide according to the invention can be used both in sheet-embossing machines and in roll machines.
  • the flat material 5 to be embossed consists of sheets 5.1, which are conveyed by a feeder 71 to a boom 72 or endless webs 5.2 in reel machines, which are conveyed from a unwinding roll to a take-up reel (as in eg EP 0 858 888 describe).
  • Fig. 3 shows a front view of individual guideways 11.1 -11.5, which have a width b and a length L (with L> b).
  • the five image film webs 6.1-6.5 here have different film widths b1: the film web 6.3 a relative small film web width b1.2 and the remaining film webs a relatively large film web width b.1.1.
  • the adjustable and replaceable symmetrical guide tracks 11i reach close to the embossing point 8 and are preferably as long as possible with a length L of e.g. 50-100 cm and with a ratio of length to width L / b in a range between 5 and 15.
  • the width b of the guideways is for example 5 to 10 cm.
  • Fig. 4 and 5 show in cross section examples of guideways with suction channels, which are particularly suitable for different film web widths b1.
  • Fig. 4 shows a guideway with suction channels, which form a central zone with a suction channel 16 and two symmetrical edge zones with the suction channels 17.1 and 17.2.
  • the film web width b1 only the zones covered by the film web can be connected to the vacuum source 13i and evacuated. So a very even pressure distribution (pi) can be achieved.
  • FIG. 5 shows an example of a guideway with a central suction channel 16 and with two subsequent, mutually connected lateral suction channels 17, which are connected via a faulty air switching valve 18 with the vacuum source 13i. Uncovered zones will not be evacuated here.
  • a narrower film web 6.2 with width b.1.2 covers the suction channel 16 and a wider film web 6.1 with b1.1 also covers the suction channels 17th
  • Fig. 6 shows a plan view of the guideway of Fig. 5 with a few, relatively small suction openings 14 with a diameter of eg 1-2 mm, which are arranged at large intervals symmetrically to the central axis.
  • the very small areal proportion of the suction openings is preferably in a range of, for example 0.5 - 3%. This makes it possible to generate easily adjustable, defined braking forces and tensile stresses zfi.
  • the surface 12 with suction openings 14 may also consist of an air-permeable microporous layer, for example, analogous to the air cushion support surface 37 of Fig. 10a , which is sucked instead of ventilated.
  • Fig. 7 shows a further example with a symmetrical arrangement of suction openings 14, which are divisible into different zones, analogous to Fig. 4 ,
  • Fig. 8 shows an example with eight narrow guideways 11.1-11.8 with suppression p1-p8 for eight image film webs 6.1- 6.8 for correspondingly high Rick josgeon.
  • Fig. 9 shows an example of a film web guide in the image film webs 61, 6.2 are combined with color film webs 6.11, 6.12.
  • a short and wide braking and guiding wall 10 can additionally be arranged as a film tensioning device for the simultaneous embossing of color film webs 6.11, 6.12 and a plurality of image film webs 6.1, 6.2. This allows a very wide range of application of the embossing machine from pure color foil stamping to pure image foil stamping.
  • Such a brake and guide wall is in Fig. 2 shown and also from the EP 1 593 503 known.
  • this is not suitable for several image film webs, since their tensile stresses zi can not be individually regulated and adjusted while the machine is running.
  • the 10 and 11 show examples of transversely adjustable Y side two side guide elements 30 on low-friction deflecting elements 31, 32, with which the image film webs 6i in the Y direction exactly to the optimum Picture mark positions can be set.
  • the film webs on the deflecting elements in the Y direction must be very easy, as frictionless as possible, can be moved.
  • the deflection elements 31, 32 may be formed as air cushion bearing surfaces 37 and, for example, consist of an air-permeable microporous layer which is ventilated.
  • the Fig. 10a, b show in side and front view an example of a virtually frictionless deflection element 31, which is formed as a curved air cushion support surface 37.
  • the guide track 11i is correctly positioned when the machine is stationary, and the distance of the two-sided side guide elements 30, which are here mounted displaceably on the deflecting element (db1), is set to the film width b1.
  • both side guide elements 30 can be adjusted together with the deflection element (with the machine running) in the Y direction to the optimum image mark position ( ⁇ Y).
  • Fig. 11 shows another example where the two side guide members 30 are adjustable to the film width b1 (db1) attached to a connecting element 34. They are so displaced together in the transverse direction Y and adjustable.
  • This setting ( ⁇ Y) can for example be transmitted via a flexible shaft 36 to a control panel and with a setting thread 35 manually or by servo motor (actuator) can be performed.
  • Fig. 12 schematically the time course v (t) of the film web speed when advancing to the next embossing position:
  • a1 of eg 10 - 30 m / s 2
  • v2 of, for example, 5 cm / s
  • the image film webs 6i are decelerated with much lower delay a2 (eg 2 m / s 2 ) and shortly before standstill (at time t4) the negative pressure pi in the guideways 11i is rapidly increased and thus the film webs 6i become stronger pressed the guideways, so that slipping at standstill is prevented.
  • a2 eg 2 m / s 2
  • Fig. 13 shows an example for generating this rapid increase of the negative pressure pi by means of additional fast-switching vacuum valves 24.1 - 24.4, which are connected to the vacuum sources 13.1-13.4, with the central suction fan 23 and with the guideways 11.1-11.4.
  • the vacuum valves 24i are opened rapidly (in msec) and the higher negative pressure p0 of the central suction fan 23 is passed directly to the guide tracks 11i. After the embossing process is switched back to the lower regulated negative pressure pi of the individual negative pressure sources 13.1-13.4.

Landscapes

  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Advancing Webs (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (19)

  1. Machine d'impression-gaufrage à plat dotée d'un dispositif (2) qui guide plusieurs nappes (6) de film en provenance de rouleaux de déroulement (7) au-dessus d'une plaque de gaufrage (3) d'une presse (4) à lit plat et dotée d'un dispositif de tension de film situé en avant de la plaque de gaufrage et de dispositifs (9) d'avancement de film pour chaque nappe de film après la plaque de gaufrage,
    caractérisée en ce que
    plusieurs pistes de guidage (11.1, 11.2, 11.3) ajustables séparément dans la direction transversale (Y) par rapport à la direction d'avancement (X), allongées et à symétrie centrale sont prévues comme dispositifs de tension de film directement en avant de la plaque de gaufrage (3), les pistes de guidage présentant une surface lisse (12) à faible coefficient de frottement et des ouvertures d'aspiration (14) dans les surfaces, raccordées à des sources asservies de dépression (13.1, 13.2, 13.3) en vue d'établir de manière indépendante une dépression (pi) et une force freinage (zi) sur chaque piste distincte de guidage (11.1, 11.2, 11.3),
    en ce qu'un capteur (15i) de repère d'image situé entre le dispositif (9i) d'avancement de film et la piste de guidage (11i) est associé à chaque nappe (6i) de film de l'image et
    en ce que des éléments (30) de guidage latéral réglables sont associés de chaque côté à des éléments de renvoi (31, 32) à faible coefficient de frottement, directement en avant des pistes de guidage et après la plaque de gaufrage (3), et
    en ce que les nappes de films (6i) peuvent être guidées de manière centrée sur les pistes de guidage à l'aide de ces éléments (30) de guidage latéral.
  2. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce que la surface (12) des pistes de guidage contient une matière synthétique à polymère fluoré bu est constituée d'aluminium durci par anodisation dans lequel est incorporé un polymère fluoré (par exemple le PTFE).
  3. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce que les surfaces (12) des pistes de guidage présentent une conductivité électrique minimale de telle sorte que les nappes de film ne puissent pas se charger électrostatiquement.
  4. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce que la différence entre le coefficient de frottement à l'adhérence et le coefficient de frottement au glissement des nappes de films sur la surface (12) des pistes de guidage est d'au plus 10-20 %.
  5. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce que la longueur L des pistes de guidage (11) est comprise entre 50 et 100 cm.
  6. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce que le rapport entre la longueur et la largeur L/b des pistes de guidage est compris dans la plage de 5 à 15.
  7. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce que les ouvertures d'aspiration (14) présentent un diamètre de 1 à 3 mm et/ou en ce que les ouvertures d'aspiration occupent de 0,5 à 3 % de la surface.
  8. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce que les capteurs (15i) de repère d'image sont disposés sur les dispositifs (9i) d'avancement de film, au milieu de la plaque d'aspiration (3) ou à la fin des pistes de guidage (11i).
  9. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce que les éléments de renvoi (31, 32) sont configurés sous la forme de surfaces de soutien (37) à coussin d'air en avant des pistes de guidage et après la plaque de gaufrage.
  10. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce que les canaux d'aspiration (16, 17) forment dans les pistes de guidage (11) une zone centrale et des zones symétriques de bordure.
  11. Machine d'impression-gaufrage à plat selon la revendication 10, caractérisée en ce que les pistes de guidage présentent un canal central d'aspiration (16) auquel se raccordent deux canaux d'aspiration (17) latéraux, reliés l'un à l'autre et reliés aux sources de dépression (13i) par une soupape (18) de commutation à absence d'air.
  12. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce qu'aucun élément de guidage n'est prévu sur le côté (6a) de la couche de gaufrage des nappes de films sur toute la longueur du guide de nappe de film entre les rouleaux de déroulement (7) et la plaque de gaufrage (3).
  13. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée par un accumulateur (20) à boucle de dépression prévu en avant des pistes de guidage (11).
  14. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce que les éléments (30) de guidage latéral sont raccordés les uns aux autres, en ce que leur distance sur la largeur (b1) de la nappe de film peut être ajustée et en ce qu'ils peuvent être ajustés ensemble dans la direction transversale (Y).
  15. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce que les sources asservies de dépression (13i) sont configurées comme régulateurs de dépression asservis (22i) raccordés à un ventilateur central d'aspiration (23).
  16. Machine d'impression-gaufrage à plat selon la revendication 15, caractérisée en ce que chaque source asservie de dépression (13i) est raccordée à une soupape de dépression (24i) à commutation rapide qui présente également un raccordement au ventilateur central d'aspiration (23).
  17. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée par une commande de l'avancement de film par laquelle les nappes (6i) de films d'image sont freinées lentement après la détection des repères d'image (27) par les capteurs (15i) de repères d'image, la dépression (pi) étant augmentée rapidement dans les pistes de guidage (11i) peu avant l'arrêt des nappes de films d'image.
  18. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce qu'après les pistes de guidage (11i), des capteurs (40i) de tension de film d'image sont disposés pour déterminer la tension des films, la commande des sources de dépression (13i) pouvant être réalisée sous la forme d'une régulation à une valeur de consigne réglable de la tension de film (zi) ou de l'allongement des films (ee).
  19. Machine d'impression-gaufrage à plat selon la revendication 1, caractérisée en ce qu'une courte et large paroi de freinage et de guidage (10) servant de dispositif de tension de film est disposée en supplément en dessous des pistes de guidage (11i) pour assurer un gaufrage simultané de plusieurs nappes (6.1, 6.2) de films d'image et nappes (6.11, 6.12) de film coloré.
EP09753403.6A 2008-05-27 2009-05-25 Machine d'impression-gaufrage à plat pourvue d'un dispositif de guidage de feuilles continues Active EP2285720B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH7972008 2008-05-27
PCT/CH2009/000175 WO2009143644A1 (fr) 2008-05-27 2009-05-25 Machine d'impression-gaufrage à plat pourvue d'un dispositif de guidage de feuilles continues

Publications (2)

Publication Number Publication Date
EP2285720A1 EP2285720A1 (fr) 2011-02-23
EP2285720B1 true EP2285720B1 (fr) 2015-09-02

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US (1) US8459323B2 (fr)
EP (1) EP2285720B1 (fr)
CN (1) CN101868414B (fr)
WO (1) WO2009143644A1 (fr)

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CN103640354B (zh) * 2013-11-28 2015-04-15 大亚科技股份有限公司 烫金机横向轴和纵向轴同时运用方法
CN107107608B (zh) * 2014-12-04 2019-07-05 吉茨公司 包括箔条引导装置和单张引导装置的平面烫印机
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EP3165365A1 (fr) 2015-11-05 2017-05-10 KBA-NotaSys SA Presse d'estampage alimentée en feuilles comprenant une unité de laminage d'une feuille
EP3165366A1 (fr) 2015-11-05 2017-05-10 KBA-NotaSys SA Presse d'estampage alimentée en feuilles avec unité de laminage d'une feuille
HUE042263T2 (hu) 2015-11-30 2019-06-28 Kba Notasys Sa Meleg nyomóprés és melegnyomó eljárás
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CH683407A5 (de) 1991-02-06 1994-03-15 Maegerle Karl Lizenz Prägeverfahren für Tubenrohre.
DE9420707U1 (de) * 1994-12-24 1995-02-16 Steuer, Armin, 71111 Waldenbuch Präge-Rotationsmaschine
EP0858888B2 (fr) * 1997-02-13 2007-03-07 Maschinenfabrik Gietz Ag Presse d'estampage à plat
IT1299965B1 (it) * 1998-04-08 2000-04-04 Gd Spa Metodo ed unita' per l'alimentazione di un nastro di materiale in foglio.
DE19843533A1 (de) 1998-09-23 2000-03-30 Armin Steuer Verfahren und Vorrichtung zur Entsorgung von Bahnmaterial
EP1593503B1 (fr) 2004-05-04 2013-06-26 Maschinenfabrik Gietz Ag Dispostif de guidage du film d'une machine de dorure à plat

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CN101868414A (zh) 2010-10-20
US20110265671A1 (en) 2011-11-03
WO2009143644A1 (fr) 2009-12-03
CN101868414B (zh) 2013-09-11
EP2285720A1 (fr) 2011-02-23
US8459323B2 (en) 2013-06-11

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