EP3789200B1 - Method for coating and embossing in a printing machine - Google Patents

Method for coating and embossing in a printing machine Download PDF

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Publication number
EP3789200B1
EP3789200B1 EP19195536.8A EP19195536A EP3789200B1 EP 3789200 B1 EP3789200 B1 EP 3789200B1 EP 19195536 A EP19195536 A EP 19195536A EP 3789200 B1 EP3789200 B1 EP 3789200B1
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EP
European Patent Office
Prior art keywords
fluid
printing
embossing
coated
printing material
Prior art date
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Application number
EP19195536.8A
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German (de)
French (fr)
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EP3789200A1 (en
Inventor
Martin Schmitt-Lewen
Thomas Steigleder
Mark Faßl
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Priority to EP19195536.8A priority Critical patent/EP3789200B1/en
Priority to CN202010606521.7A priority patent/CN112440553B/en
Publication of EP3789200A1 publication Critical patent/EP3789200A1/en
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Publication of EP3789200B1 publication Critical patent/EP3789200B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/02—Apparatus or machines for carrying out printing operations combined with other operations with embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/02—Apparatus or machines for carrying out printing operations combined with other operations with embossing
    • B41F19/06—Printing and embossing between a negative and a positive forme after inking and wiping the negative forme; Printing from an ink band treated with colour or "gold"
    • B41F19/062—Presses of the rotary type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
    • B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/08—Print finishing devices, e.g. for glossing prints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/24—Inking and printing with a printer's forme combined with embossing

Definitions

  • the present invention relates to a method for coating and embossing in a printing machine, wherein in a first step a printing material is coated with a first fluid, in a second step a relief is embossed in the first fluid on the printing material by means of an embossing form and in a third step the first fluid is polymerized on the printing substrate by UV radiation in order to harden the relief.
  • EP 2 216 174 A2 describes a process in which the substrate is coated with a UV varnish in a first gap, then in a second gap it is embossed into the as yet unpolymerized varnish layer on the surface of the printing substrate, and the varnish layer is then polymerized.
  • the object of the invention is to specify a method with higher functional reliability.
  • the object is achieved by a method for coating and embossing in a printing machine, wherein in a first step a printing material is coated with a first fluid, in a second step a relief is embossed in the first fluid on the printing material by means of an embossing form and in a third step, the first fluid is polymerized on the printing substrate by UV radiation in order to harden the relief, characterized in that a fluid with a viscosity in the range from 40 Pascal seconds to 100 Pascal seconds is used as the first fluid.
  • the relief made therefrom has a high degree of dimensional stability which is reliably retained until the relief has hardened.
  • the use of a circulatory system in which the first fluid circulates and a chambered doctor blade for supplying the first fluid is not possible because of its high viscosity and is not provided for in the method according to the invention.
  • the first fluid for. B. be stored in a paint box or in a paint tray.
  • the second fluid can be polymerized on the printing substrate by means of UV radiation.
  • the second fluid can be polymerized by UV irradiation between the fourth step and the first step.
  • the second fluid can be coated with the first fluid wet-on-wet.
  • the printing substrate can be coated with a third fluid, which can have a viscosity in the range from 40 Pascal seconds to 100 Pascal seconds, or the printing substrate can be coated a further time with the second fluid.
  • An oil-based ink can be used as the second fluid.
  • the second fluid can be coated on the printing substrate with a water-based primer.
  • the first fluid can be printed by means of an offset printing unit.
  • the first fluid can be printed using a flexographic printing forme.
  • This flexographic printing form can, for example, be mounted on the blanket cylinder of the offset printing unit instead of a rubber blanket.
  • the first fluid can be pre-hardened between the first step and the second step.
  • a separating fluid can be applied to the embossing mold, which at least reduces or even completely prevents the first fluid from sticking to the embossing mold.
  • a lithographic offset fountain solution can be used as the release fluid.
  • the dampening solution is used for a different purpose than it is normally intended.
  • Figure 1 shows schematically a method in which in the transport direction 10 a printing material 2 runs through a printing machine 1, which is made of paper, cardboard or foil and can be in the form of a sheet or a web.
  • the printing press 1 comprises units arranged one after the other in a series construction for various process steps, which will be explained below.
  • Figure 2 shows that, as a result of the method, the printing substrate 2 is coated with a first fluid 11 and a second fluid 12 and a relief 4 is provided in the first fluid 11.
  • the first fluid 11 is applied to the printing material 2 with a viscosity in the range from 40 to 100 Pascal seconds.
  • the relief 4 is embossed into the applied first fluid 11 by means of an embossing form 3, for example in a converted coating unit.
  • One advantage is that, due to the comparatively high viscosity, the relief 4 does not run until it has hardened through in a third step 103 by UV irradiation from a dryer 14 will.
  • the offset printing unit 7 can have a lifter inking unit.
  • the first fluid 11 can be a UV varnish.
  • the offset printing unit 7 can have an anilox inking unit.
  • a flexographic printing forme 8 can be clamped on the blanket cylinder of the offset printing unit 7 and / or the first fluid 11 can be a UV varnish.
  • the printing material 2 is coated with the second fluid 12 in a fourth step 104 before the first step 101.
  • an offset printing unit can be used for printing the second fluid 12.
  • the second fluid 12 is a UV printing ink
  • the second fluid 12 can be cured on the printing material 2 by UV irradiation 5 from a dryer.
  • the UV irradiation 5 can be omitted, the first fluid 11 being printed onto the still wet (uncured) second fluid 12.
  • Figure 3 shows the result of a modification of the method.
  • the third fluid 13 has a viscosity in the range from 40 to 100 Pascal seconds when it is printed with an offset printing unit (graphically not shown), which is arranged between the offset printing unit for the fourth step 104 and the offset printing unit 7.
  • the third fluid 13 may or may not be identical to the second fluid 12.
  • Figure 4 shows the printing material 2 after it has left the printing press 1. This further modification differs from the method described in relation to the result according to FIG Figure 3 has led.
  • the second fluid 12 is not a UV printing ink, but an oil-based printing ink.
  • a water-based primer 6 or another oil-based printing ink can be used.
  • a UV dryer is arranged between the offset printing unit 7 and the converted coating unit (embossing unit), with which the first fluid 11 is pre-cured before the relief 4 is produced with the embossing form 3.
  • Figure 5 shows that a separating fluid 9 - for example a dampening solution that is otherwise used for the lithographic offset printing process - is applied to the embossing form 3.
  • the advantage of using the dampening solution is that no expensive special production is required for the release fluid and the dampening solution is available on the market at low cost.
  • the separating fluid 9 causes the first fluid 11 with the relief 4 to be better detached from the embossing form 3, thereby advantageously avoiding contamination of the embossing form 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Printing Methods (AREA)

Description

Vorliegende Erfindung betrifft ein Verfahren zum Beschichten und Prägen in einer Druckmaschine, wobei in einem ersten Schritt ein Bedruckstoff mit einem ersten Fluid beschichtet wird, in einem zweiten Schritt mittels einer Prägeform ein Relief in das erste Fluid auf dem Bedruckstoff geprägt wird und in einem dritten Schritt das erste Fluid auf dem Bedruckstoff durch UV-Bestrahlung polymerisiert wird, um das Relief zu härten.The present invention relates to a method for coating and embossing in a printing machine, wherein in a first step a printing material is coated with a first fluid, in a second step a relief is embossed in the first fluid on the printing material by means of an embossing form and in a third step the first fluid is polymerized on the printing substrate by UV radiation in order to harden the relief.

In EP 2 216 174 A2 ist ein Verfahren beschrieben, bei dem in einem ersten Spalt der Bedruckstoff mit einem UV-Lack beschichtet wird, anschließend in einem zweiten Spalt in die auf der Oberfläche des Bedruckstoffs befindliche, noch nicht polymerisierte Lackschicht geprägt wird und darauffolgend die Lackschicht polymerisiert wird.In EP 2 216 174 A2 describes a process in which the substrate is coated with a UV varnish in a first gap, then in a second gap it is embossed into the as yet unpolymerized varnish layer on the surface of the printing substrate, and the varnish layer is then polymerized.

Ungünstig daran ist, dass nach dem Prägen die Lackschicht zerlaufen kann, bevor sie polymerisiert wird.What is disadvantageous about this is that after embossing, the lacquer layer can melt before it is polymerized.

Aufgabe der Erfindung ist, ein Verfahren mit höherer Funktionssicherheit anzugeben.The object of the invention is to specify a method with higher functional reliability.

Die Aufgabe wird gelöst durch ein Verfahren zum Beschichten und Prägen in einer Druckmaschine, wobei in einem ersten Schritt ein Bedruckstoff mit einem ersten Fluid beschichtet wird, in einem zweiten Schritt mittels einer Prägeform ein Relief in das erste Fluid auf dem Bedruckstoff geprägt wird und in einem dritten Schritt das erste Fluid auf dem Bedruckstoff durch UV-Bestrahlung polymerisiert wird, um das Relief zu härten, dadurch gekennzeichnet, dass als das erste Fluid ein Fluid mit einer Viskosität im Bereich von 40 Pascalsekunden bis 100 Pascalsekunden verwendet wird.The object is achieved by a method for coating and embossing in a printing machine, wherein in a first step a printing material is coated with a first fluid, in a second step a relief is embossed in the first fluid on the printing material by means of an embossing form and in a third step, the first fluid is polymerized on the printing substrate by UV radiation in order to harden the relief, characterized in that a fluid with a viscosity in the range from 40 Pascal seconds to 100 Pascal seconds is used as the first fluid.

Durch die beim erfindungsgemäßen Verfahren vergleichsweise hohe Viskosität des ersten Fluids hat das daraus bestehende Relief eine hohe Formstabilität, die bis zum Härten des Reliefs mit Sicherheit erhalten bleibt.As a result of the comparatively high viscosity of the first fluid in the method according to the invention, the relief made therefrom has a high degree of dimensional stability which is reliably retained until the relief has hardened.

Der Umstand, dass aufgrund der hohen Viskosität das erste Fluid bei seiner Verarbeitung in der Druckmaschine nicht zum Beispiel mittels einer Pumpe im Kreislauf zirkuliert werden kann, fällt nicht negativ ins Gewicht. Die Verwendung eines Kreislaufsystems, in dem das erste Fluid zirkuliert, und eine Kammerrakel zum Zuführen des ersten Fluids ist aufgrund von dessen hoher Viskosität nicht möglich und beim erfindungsgemäßen Verfahren nicht vorgesehen. Es gibt nämlich Druckwerke, z.B. Offset-Druckwerke, mit denen das erste Fluid ohne seine Zirkulation in einem Kreislauf verdruckt werden kann. Hierbei kann das erste Fluid z. B. in einem Farbkasten oder in einer Lackwanne gespeichert werden.The fact that, due to the high viscosity, the first fluid cannot be circulated in the circuit during its processing in the printing press, for example by means of a pump, does not have a negative impact. The use of a circulatory system in which the first fluid circulates and a chambered doctor blade for supplying the first fluid is not possible because of its high viscosity and is not provided for in the method according to the invention. There are printing units, e.g. offset printing units, with which the first fluid can be printed in a circuit without its circulation. Here, the first fluid, for. B. be stored in a paint box or in a paint tray.

Es sind verschiedene Weiterbildungen des erfindungsgemäßen Verfahrens möglich:

  • Der Bedruckstoff kann in einem vierten Schritt, der vor dem ersten Schritt erfolgt, mit einem zweiten Fluid beschichtet werden.
Various developments of the method according to the invention are possible:
  • The printing material can be coated with a second fluid in a fourth step, which takes place before the first step.

Das zweite Fluid kann auf dem Bedruckstoff durch UV-Bestrahlung polymerisiert werden. Hierbei kann das zweite Fluid durch UV-Bestrahlung zwischen dem vierten Schritt und dem ersten Schritt polymerisiert werden.The second fluid can be polymerized on the printing substrate by means of UV radiation. Here, the second fluid can be polymerized by UV irradiation between the fourth step and the first step.

In dem ersten Schritt kann eine Nass-in-Nass-Beschichtung des zweiten Fluides mit dem ersten Fluid erfolgen.In the first step, the second fluid can be coated with the first fluid wet-on-wet.

Zwischen dem vierten Schritt und dem ersten Schritt kann der Bedruckstoff mit einem dritten Fluid beschichtet werden, welches eine Viskosität im Bereich von 40 Pascalsekunden bis 100 Pascalsekunden aufweisen kann, oder kann der Bedruckstoff ein weiteres Mal mit dem zweiten Fluid beschichtet werden.Between the fourth step and the first step, the printing substrate can be coated with a third fluid, which can have a viscosity in the range from 40 Pascal seconds to 100 Pascal seconds, or the printing substrate can be coated a further time with the second fluid.

Als das zweite Fluid kann eine ölbasierte Druckfarbe verwendet werden.An oil-based ink can be used as the second fluid.

Zwischen dem vierten Schritt und dem ersten Schritt kann das zweite Fluid auf dem Bedruckstoff mit einem wasserbasierten Primer beschichtet werden.Between the fourth step and the first step, the second fluid can be coated on the printing substrate with a water-based primer.

In dem ersten Schritt kann das erste Fluid mittels eines Offset-Druckwerkes verdruckt werden.In the first step, the first fluid can be printed by means of an offset printing unit.

In dem ersten Schritt kann das erste Fluid mittels einer Flexo-Druckform verdruckt werden. Diese Flexo-Druckform kann beispielsweise anstelle eines Gummituchs auf dem Gummituchzylinder des Offset-Druckwerkes montiert sein.In the first step, the first fluid can be printed using a flexographic printing forme. This flexographic printing form can, for example, be mounted on the blanket cylinder of the offset printing unit instead of a rubber blanket.

Zwischen dem ersten Schritt und dem zweiten Schritt kann das erste Fluid vorgehärtet werden.The first fluid can be pre-hardened between the first step and the second step.

In dem zweiten Schritt kann auf die Prägeform ein Trennfluid aufgebracht werden, welches ein Anhaften des ersten Fluids an der Prägeform zumindest verringert oder sogar ganz verhindert.In the second step, a separating fluid can be applied to the embossing mold, which at least reduces or even completely prevents the first fluid from sticking to the embossing mold.

Als das Trennfluid kann ein lithografisches Offset-Feuchtmittel verwendet werden. Hierbei wird das Feuchtmittel für einen anderen Zweck verwendet, als es normalerweise vorgesehen ist.A lithographic offset fountain solution can be used as the release fluid. Here the dampening solution is used for a different purpose than it is normally intended.

Weiterbildungen ergeben sich auch aus der nachfolgenden Beschreibung von Ausführungsbeispielen und der dazugehörigen Zeichnung, worin zeigt:

Figur 1:
das Schema einer Druckmaschine bei der Durchführung des erfindungsgemäßen Verfahrens
Figuren 2 bis 4:
den Bedruckstoff als Ergebnis verschiedener Verfahrensvarianten und
Figur 5:
die Verwendung eines Trennmittels in einem Prägewerk der Druckmaschine.
Further developments also result from the following description of exemplary embodiments and the associated drawing, which shows:
Figure 1:
the scheme of a printing press when carrying out the method according to the invention
Figures 2 to 4:
the substrate as a result of various process variants and
Figure 5:
the use of a release agent in an embossing unit of the printing machine.

Figur 1 zeigt schematisch ein Verfahren, bei dem in Transportrichtung 10 durch eine Druckmaschine 1 ein Bedruckstoff 2 läuft, der aus Papier, Karton oder Folie bestehen und die Form eines Bogens oder einer Bahn haben kann. Die Druckmaschine 1 umfasst in Reihenbauweise nacheinander angeordnete Werke für verschiedene Verfahrensschritte, die nachfolgend noch erläutert werden. Figure 1 shows schematically a method in which in the transport direction 10 a printing material 2 runs through a printing machine 1, which is made of paper, cardboard or foil and can be in the form of a sheet or a web. The printing press 1 comprises units arranged one after the other in a series construction for various process steps, which will be explained below.

Figur 2 zeigt, dass als Ergebnis des Verfahrens der Bedruckstoff 2 mit einem ersten Fluid 11 und zweiten Fluid 12 beschichtet und einem Relief 4 in dem ersten Fluid 11 versehen ist. In einem Offset-Druckwerk 7 wird in einem ersten Schritt 101 auf den Bedruckstoff 2 das erste Fluid 11 mit einer Viskosität im Bereich von 40 bis 100 Pascalsekunden aufgebracht. Mittels einer Prägeform 3, z.B. in einem umgerüsteten Lackwerk, wird in das aufgebrachte erste Fluid 11 in einem zweiten Schritt 102 das Relief 4 geprägt. Ein Vorteil ist, dass das Relief 4 aufgrund der vergleichsweise hohen Viskosität nicht zerläuft, bis es in einem dritten Schritt 103 durch UV-Bestrahlung aus einem Trockner 14 durchgehärtet wird. Das Offset-Druckwerk 7 kann ein Heberfarbwerk aufweisen. Hierbei kann das erste Fluid 11 ein UV-Varnish sein. Alternativ kann das Offset-Druckwerk 7 ein Anilox-Farbwerk aufweisen. Hierbei kann auf dem Gummituchzylinder des Offset-Druckwerks 7 eine Flexo-Druckform 8 aufgespannt sein und/oder das erste Fluid 11 ein UV-Lack sein. Figure 2 shows that, as a result of the method, the printing substrate 2 is coated with a first fluid 11 and a second fluid 12 and a relief 4 is provided in the first fluid 11. In an offset printing unit 7, in a first step 101, the first fluid 11 is applied to the printing material 2 with a viscosity in the range from 40 to 100 Pascal seconds. In a second step 102, the relief 4 is embossed into the applied first fluid 11 by means of an embossing form 3, for example in a converted coating unit. One advantage is that, due to the comparatively high viscosity, the relief 4 does not run until it has hardened through in a third step 103 by UV irradiation from a dryer 14 will. The offset printing unit 7 can have a lifter inking unit. Here, the first fluid 11 can be a UV varnish. Alternatively, the offset printing unit 7 can have an anilox inking unit. Here, a flexographic printing forme 8 can be clamped on the blanket cylinder of the offset printing unit 7 and / or the first fluid 11 can be a UV varnish.

Der Bedruckstoff 2 wird in einem vierten Schritt 104 vor dem ersten Schritt 101 mit dem zweiten Fluid 12 beschichtet. Hierbei kann zum Verdrucken des zweiten Fluids 12 ein Offset-Druckwerk verwendet werden. Wenn das zweite Fluid 12 eine UV-Druckfarbe ist, kann nach dem vierten Schritt 104 und vor dem ersten Schritt 101 durch UV-Bestrahlung 5 aus einem Trockner das zweite Fluid 12 auf dem Bedruckstoff 2 gehärtet werden. Alternativ kann die UV-Bestrahlung 5 entfallen, wobei auf das noch nasse (ungehärtete) zweite Fluid 12 das erste Fluid 11 gedruckt wird.The printing material 2 is coated with the second fluid 12 in a fourth step 104 before the first step 101. In this case, an offset printing unit can be used for printing the second fluid 12. If the second fluid 12 is a UV printing ink, after the fourth step 104 and before the first step 101, the second fluid 12 can be cured on the printing material 2 by UV irradiation 5 from a dryer. Alternatively, the UV irradiation 5 can be omitted, the first fluid 11 being printed onto the still wet (uncured) second fluid 12.

Figur 3 zeigt das Ergebnis einer Modifikation des Verfahrens. Hierbei befindet sich auf der Schicht des zweiten Fluids 12 eine Schicht eines dritten Fluids 13 und auf dieser die Schicht des ersten Fluids 11. Das dritte Fluid 13 hat eine Viskosität im Bereich von 40 bis 100 Pascalsekunden, wenn es mit einem Offset-Druckwerk (zeichnerisch nicht dargestellt) verdruckt wird, das zwischen dem Offset-Druckwerk für den vierten Schritt 104 und dem Offset-Druckwerk 7 angeordnet ist. Das dritte Fluid 13 kann mit dem zweiten Fluid 12 identisch sein oder nicht. Figure 3 shows the result of a modification of the method. Here there is a layer of a third fluid 13 on the layer of the second fluid 12 and the layer of the first fluid 11 on it. The third fluid 13 has a viscosity in the range from 40 to 100 Pascal seconds when it is printed with an offset printing unit (graphically not shown), which is arranged between the offset printing unit for the fourth step 104 and the offset printing unit 7. The third fluid 13 may or may not be identical to the second fluid 12.

Figur 4 zeigt den Bedruckstoff 2 nach Verlassen der Druckmaschine 1. Diese weitere Modifikation unterscheidet sich von dem Verfahren, das zum Ergebnis gemäß Figur 3 geführt hat. Gemäß Figur 4 ist das zweite Fluid 12 keine UV-Druckfarbe, sondern eine ölbasierte Druckfarbe. Statt des dritten Fluids 13 kann ein wasserbasierter Primer 6 oder eine weitere ölbasierte Druckfarbe verwendet werden. Figure 4 shows the printing material 2 after it has left the printing press 1. This further modification differs from the method described in relation to the result according to FIG Figure 3 has led. According to Figure 4 the second fluid 12 is not a UV printing ink, but an oil-based printing ink. Instead of the third fluid 13, a water-based primer 6 or another oil-based printing ink can be used.

Zeichnerisch nicht dargestellt ist eine Modifikation, bei der zwischen dem Offset-Druckwerk 7 und dem umgerüsteten Lackwerk (Prägewerk) ein UV-Trockner angeordnet ist, mit dem das erste Fluid 11 vorgehärtet wird, bevor mit der Prägeform 3 das Relief 4 erzeugt wird.Not shown in the drawing is a modification in which a UV dryer is arranged between the offset printing unit 7 and the converted coating unit (embossing unit), with which the first fluid 11 is pre-cured before the relief 4 is produced with the embossing form 3.

Figur 5 zeigt, dass auf die Prägeform 3 ein Trennfluid 9 - z.B. ein Feuchtmittel, das sonst für den lithographischen Offset-Druckprozess verwendet wird - aufgebracht wird. Vorteil bei der Verwendung des Feuchtmittels ist, dass für das Trennfluid keine teure Spezialanfertigung notwendig ist und das Feuchtmittel auf dem Markt kostengünstig erhältlich ist. Das Trennfluid 9 bewirkt beim Auslauf des Bedruckstoffs 2 aus einem von einem Prägezylinder und einem Gegendruckzylinder zusammen gebildeten Prägespalt ein besseres Ablösen des ersten Fluids 11 mit dem Relief 4 von der Prägeform 3, wodurch eine Verschmutzung der Prägeform 3 in vorteilhafter Weise vermieden wird. Figure 5 shows that a separating fluid 9 - for example a dampening solution that is otherwise used for the lithographic offset printing process - is applied to the embossing form 3. The advantage of using the dampening solution is that no expensive special production is required for the release fluid and the dampening solution is available on the market at low cost. When the printing material 2 runs out of an embossing gap formed by an embossing cylinder and an impression cylinder, the separating fluid 9 causes the first fluid 11 with the relief 4 to be better detached from the embossing form 3, thereby advantageously avoiding contamination of the embossing form 3.

BezugszeichenlisteList of reference symbols

11
DruckmaschinePrinting press
22
BedruckstoffSubstrate
33
PrägeformEmbossing form
44th
Reliefrelief
55
UV-BestrahlungUV irradiation
66th
PrimerPrimer
77th
Offset-DruckwerkOffset printing unit
88th
Flexo-DruckformFlexographic printing form
99
TrennfluidSeparating fluid
1010
TransportrichtungTransport direction
1111
erstes Fluidfirst fluid
1212th
zweites Fluidsecond fluid
1313th
drittes Fluidthird fluid
1414th
Trocknerdryer
101101
erster Schrittfirst step
102102
zweiter Schrittsecond step
103103
dritter SchrittThird step
104104
vierter Schrittfourth step

Claims (13)

  1. Method of coating and embossing in a printing machine (1) wherein
    - in a first step (101), a printing material (2) is coated with a first fluid (11),
    - in a second step (102), a relief (4) is embossed into the first fluid (11) on the printing material (2) by means of an embossing die (3),
    - in a third step (103), the first fluid (11) on the printing material (2) is polymerized by UV irradiation (5) to cure the relief (4),
    characterized
    in that a fluid of a viscosity ranging between 40 and 100 pascal-seconds is used as the first fluid (11).
  2. Method according to claim 1,
    characterized
    in that in a fourth step (104), which occurs before the first step (101), the printing material (2) is coated with a second fluid (12).
  3. Method according to claim 2,
    characterized
    in that the second fluid (12) on the printing material (2) is polymerized by UV irradiation (5).
  4. Method according to claim 2 or 3,
    characterized
    in that between the fourth step (104) and the first step (101), the second fluid (12) is polymerized by UV irradiation (5).
  5. Method according to claim 2 or 3,
    characterized
    in that in the first step (101), a wet-in-wet coating of the second fluid (12) with the first fluid (11) occurs.
  6. Method according to any one of claims 2 to 5,
    characterized
    in that between the fourth step (104) and the first step (101), the printing material (2) is coated with a third fluid (13), which has a viscosity of between 40 and 100 pascal-seconds, or once again with the second fluid (12).
  7. Method according to any one of claims 2 to 6,
    characterized
    in that an oil-based printing ink is used as the second fluid (12).
  8. Method according to claim 7,
    characterized
    in that between the fourth step (104) and the first step (101), the second fluid (12) on the printing substrate (2) is coated with a water-based primer (6).
  9. Method according to any one of claims 1 to 8,
    characterized
    in that in the first step, the first fluid (11) is applied by means of an offset printing unit (7).
  10. Method according to any one of claims 1 to 8,
    characterized
    in that in the first step, the first fluid (11) is applied by means of a flexographic printing forme (8).
  11. Method according to claim 10,
    characterized
    in that between the first step (101) and the second step (102), the first fluid (11) is precured.
  12. Method according to any one of claims 1 to 11,
    characterized
    in that in the second step (102), a separation fluid (9) reducing adherence between the first fluid (11) and the embossing die (3) is applied to the embossing die (3).
  13. Method according to claim 12,
    characterized
    in that a lithographic offset dampening fluid is used as the separation fluid (9).
EP19195536.8A 2019-09-05 2019-09-05 Method for coating and embossing in a printing machine Active EP3789200B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19195536.8A EP3789200B1 (en) 2019-09-05 2019-09-05 Method for coating and embossing in a printing machine
CN202010606521.7A CN112440553B (en) 2019-09-05 2020-06-29 Method for coating and embossing in a printing press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19195536.8A EP3789200B1 (en) 2019-09-05 2019-09-05 Method for coating and embossing in a printing machine

Publications (2)

Publication Number Publication Date
EP3789200A1 EP3789200A1 (en) 2021-03-10
EP3789200B1 true EP3789200B1 (en) 2021-08-11

Family

ID=67874294

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19195536.8A Active EP3789200B1 (en) 2019-09-05 2019-09-05 Method for coating and embossing in a printing machine

Country Status (2)

Country Link
EP (1) EP3789200B1 (en)
CN (1) CN112440553B (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006015474A1 (en) * 2006-03-31 2007-10-04 Heidelberger Druckmaschinen Ag Foil transfer station with integrated finishing device
DE102009000445A1 (en) 2009-01-28 2010-08-05 Manroland Ag Method and device for coating and embossing a printing substrate in a processing machine
EP2724864B1 (en) * 2012-10-24 2018-12-26 Heidelberger Druckmaschinen AG Method and device for creating and transferring diffractive microstructures on a printable material
CN106626844B (en) * 2016-11-22 2019-02-26 深圳劲嘉集团股份有限公司 A kind of offset printing production technology for surface of the stock effect process
CN108045120A (en) * 2017-10-30 2018-05-18 虎彩印艺股份有限公司 A kind of offset printing line cold foil technology and equipment

Also Published As

Publication number Publication date
CN112440553B (en) 2022-04-12
EP3789200A1 (en) 2021-03-10
CN112440553A (en) 2021-03-05

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