CN112440553B - Method for coating and embossing in a printing press - Google Patents
Method for coating and embossing in a printing press Download PDFInfo
- Publication number
- CN112440553B CN112440553B CN202010606521.7A CN202010606521A CN112440553B CN 112440553 B CN112440553 B CN 112440553B CN 202010606521 A CN202010606521 A CN 202010606521A CN 112440553 B CN112440553 B CN 112440553B
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- China
- Prior art keywords
- fluid
- preparation
- printing
- embossing
- light sources
- Prior art date
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- 238000007639 printing Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000004049 embossing Methods 0.000 title claims abstract description 18
- 239000011248 coating agent Substances 0.000 title claims description 6
- 238000000576 coating method Methods 0.000 title claims description 6
- 239000012530 fluid Substances 0.000 claims abstract description 86
- 239000000463 material Substances 0.000 claims abstract description 18
- 230000005855 radiation Effects 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 15
- 238000007645 offset printing Methods 0.000 claims description 14
- 239000000080 wetting agent Substances 0.000 claims description 7
- 239000000049 pigment Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 13
- 230000000379 polymerizing effect Effects 0.000 claims 1
- 238000003825 pressing Methods 0.000 claims 1
- 239000002966 varnish Substances 0.000 description 8
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
Images
Classifications
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- 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
- 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
- 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
Abstract
The invention relates to a method for applying and embossing in a printing press, wherein a first fluid (11) is applied to a printing material (2) in a first step, an embossing pattern (4) is embossed into the first fluid (11) on the printing material (2) by means of an embossing tool in a second step, and the first fluid (11) on the printing material (2) is polymerized by UV radiation in a third step in order to cure the embossing pattern (4). A fluid having a viscosity in the range of 40 to 100 Pascal seconds is used as the first fluid (11).
Description
Technical Field
The invention relates to a method for applying and embossing in a printing press, wherein in a first step a first fluid is applied to a printing material, in a second step a Relief (Relief) is pressed into the first fluid on the printing material by means of an embossing tool, and in a third step the first fluid on the printing material is polymerized (polymerized) by UV radiation in order to cure the Relief.
Background
EP 2216174 a2 describes a method in which the printing material is coated with a UV varnish in a first gap, subsequently pressed into an unpolymerized varnish layer located on the surface of the printing material in a second gap, and then the varnish layer is polymerized.
A disadvantage is that after embossing, the varnish layer may be broken before polymerization (zerlaufen).
Disclosure of Invention
The object of the present invention is to provide a method with increased functional reliability.
This object is achieved by a method for applying and embossing in a printing press, wherein in a first step a first fluid is applied to a printing material, in a second step a relief is pressed into the first fluid on the printing material by means of an embossing tool, and in a third step the first fluid on the printing material is polymerized by UV radiation in order to cure the relief, characterized in that a fluid having a viscosity in the range of 40 to 100 pascal seconds is used as the first fluid.
In the method according to the invention, the relief pattern thus formed has a high degree of shape stability due to the relatively high viscosity of the first fluid, which can be reliably maintained until the relief pattern is cured.
The fact that the first fluid cannot be circulated in a circuit, for example by means of a pump, during its treatment in the printing press is not adversely affected because of the high viscosity. The use of a loop system in which the first fluid circulates, and a chambered doctor blade for supplying said first fluid, are not possible due to the high viscosity of the first fluid and are not provided in the method according to the invention. In this case, printing units (for example offset printing units) are provided, by means of which printing can be carried out without the first fluid circulating in a circuit. The first fluid can be stored in an ink fountain or a varnish bath, for example.
Different modifications of the method according to the invention are possible:
a fourth step is carried out before the first step, in which fourth step the print substrate can be coated with a second fluid.
The second fluid may be polymerized on the substrate by UV radiation.
Here, the second fluid may be polymerized by UV radiation between the fourth step and the first step.
In a first step, the second fluid may be wet-on-wet coated with the first fluid (Nass-in-Nass-Beschichtmung).
Between the fourth step and the first step, the printing material may be coated with a third fluid having a viscosity in the range of 40 pascal seconds to 100 pascal seconds, or the printing material may be coated with the second fluid again.
Oil-based printing pigments may be used as the second fluid.
Between the fourth step and the first step, a water-based Primer (Primer) may be applied to the second fluid on the substrate.
In a first step, the first fluid may be printed by means of an offset printing mechanism.
In a first step, the first fluid may be printed by means of a Flexo-printing die (Flexo-Druckform). The flexo die may be mounted on a blanket cylinder of an offset printing mechanism, for example, instead of a blanket.
Between the first step and the second step, the first fluid may be pre-cured.
In a second step, a separating fluid may be applied on the imprint template, which at least reduces or even completely prevents adhesion of the first fluid on the imprint template.
As the spacer fluid, a lithographic Offset wetting agent (lithographches Offset-feuchhtmitel) may be used. In this case, the wetting agent is used for other purposes than the usual arrangement.
Drawings
The improvement also results from the following description of the exemplary embodiments and the accompanying drawings, in which:
FIG. 1: a schematic view of a printing press when carrying out the method according to the invention;
FIGS. 2 to 4: a substrate as a result of different process variants; and
FIG. 5: use of a separating agent in an impression mechanism of a printing press.
Detailed Description
Fig. 1 schematically shows a method in which a printing substrate 2 is passed through a printing press 1 in a transport direction 10, the printing substrate 2 being made of paper, cardboard or foil and having the form of a sheet or web. The printing press 1 comprises a plurality of mechanisms for different method steps, which are arranged one behind the other in a tandem arrangement and which will be explained further below.
Fig. 2 shows that as a result of the method, the print substrate 2 is coated with a first fluid 11 and a second fluid 12, and that an indentation 4 is provided in the first fluid 11. In the offset printing unit 7, in a first step 101, a first fluid 11 having a viscosity in the range of 40 to 100 pascal seconds is applied to the print substrate 2. In a second step 102, the embossing pattern 4 is pressed into the applied first fluid 11 by means of the embossing tool 3 (for example in a modified varnish arrangement). The advantage here is that the relief pattern 4 does not dissolve due to the relatively high viscosity until the relief pattern 4 is completely cured in the third step 103 by UV radiation from the dryer 14. The offset printing mechanism 7 may have an ink transfer roller ink mechanism (Heberfarbwerk). Here, the first fluid 11 may be UV Varnish (UV-Varnish). Alternatively, the offset printing mechanism 7 may have a screen ink mechanism. Here, a flexo printing die 8 may be tensioned on a blanket cylinder of the offset printing mechanism 7, and/or the first fluid 11 may be UV varnish.
A fourth step 104 is carried out before the first step 101, in which fourth step 104 the print substrate 2 is coated with the second fluid 12. Here, the second fluid 12 may be printed using an offset printing mechanism. If the second fluid 12 is a UV printing pigment, the second fluid 12 on the substrate 2 may be cured by UV radiation 5 from a dryer after the fourth step 104 and before the first step 101. Alternatively, the UV radiation 5 may be eliminated, wherein the first fluid 11 is printed on the still wet (uncured) second fluid 12.
Fig. 3 shows the result of a modification of the method. Here, a coating of the third fluid 13 is present on the layer of the second fluid 12, and a coating of the first fluid 11 is present on this coating of the third fluid 13. If printing is performed by means of an offset printing mechanism (not shown in the drawings) located between the offset printing mechanism used in the fourth step 104 and the offset printing mechanism 7, the viscosity of the third fluid 13 is in the range of 40 to 100 pascal seconds. The third fluid 13 may or may not be identical to the second fluid 12.
Fig. 4 shows the print substrate 2 after leaving the printing press 1. This further variant is not different from the method which leads to the result according to fig. 3. According to fig. 4, the second fluid 12 is not a UV printing colour, but an oil-based printing colour. Instead of the third fluid 13, a water-based basecoat 6 or another oil-based printing pigment may be used.
A modification, which is not shown in the drawings, consists in arranging a UV dryer between the offset printing mechanism 7 and a modified varnish mechanism (embossing mechanism), by means of which UV dryer the first fluid 11 is pre-cured before the relief pattern 4 is produced by means of the embossing tool 3.
Fig. 5 shows that a separating fluid 9, for example a wetting agent, is applied to the embossing tool 3, which wetting agent is otherwise used in the offset lithographic printing process. The advantage of using the wetting agent is that no expensive special manufacturing process for the separating fluid is required and the wetting agent is available on the market at low cost. The separating fluid 9 enables the first fluid 11 with the relief 4 to better escape from the impression cylinder 3 when the printing material 2 emerges from the impression nip formed by the impression cylinder and impression cylinder, thereby advantageously avoiding contamination of the impression cylinder 3.
List of reference numerals
1 printing machine
2 printing material
3 impression mould
4 embossing
5 UV radiation
6 first coat
7 offset printing mechanism
8 flexible printing mould
9 separating the fluids
10 direction of conveyance
11 first fluid
12 second fluid
13 third fluid
14 dryer
101 first step
102 second step
103 third step
104 fourth step
Claims (13)
1. A method for coating and embossing in a printing machine (1),
-applying a first fluid (11) to the printing material (2) in a first step (101),
-in a second step (102), pressing a relief pattern (4) into the first fluid (11) on the substrate (2) by means of the imprint mold (3), and
-in a third step (103), polymerizing the first fluid (11) on the substrate (2) by UV radiation (5) in order to cure the relief (4),
it is characterized in that the preparation method is characterized in that,
as the first fluid (11), a fluid having a viscosity in the range of 40 Pascal seconds to 100 Pascal seconds is used.
2. The method of claim 1, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
a fourth step (104) is carried out before the first step (101), in which a second fluid (12) is applied to the print substrate (2).
3. The method of claim 2, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
the second fluid (12) on the printing material (2) is polymerized by UV radiation (5).
4. The method according to claim 2 or 3,
it is characterized in that the preparation method is characterized in that,
between the fourth step (104) and the first step (101), the second fluid (12) is polymerized by UV radiation (5).
5. The method according to claim 2 or 3,
it is characterized in that the preparation method is characterized in that,
in the first step (101), the second fluid (12) is wet-on-wet coated with the first fluid (11).
6. The method according to claim 2 or 3,
it is characterized in that the preparation method is characterized in that,
between the fourth step (104) and the first step (101), the printing material (2) is coated with a third fluid (13) having a viscosity in the range from 40 to 100 pascal seconds, or the second fluid (12) is coated again.
7. The method according to claim 2 or 3,
it is characterized in that the preparation method is characterized in that,
as the second fluid (12), an oil-based printing pigment is used.
8. The method of claim 7, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
between the fourth step (104) and the first step (101), a water-based primer (6) is applied to the second fluid (12) on the substrate (2).
9. The method according to any one of claims 1 to 3,
it is characterized in that the preparation method is characterized in that,
in the first step, the first fluid (11) is printed by means of an offset printing mechanism (7).
10. The method according to any one of claims 1 to 3,
it is characterized in that the preparation method is characterized in that,
in the first step, the first fluid (11) is printed by means of a flexo-printing die (8).
11. The method of claim 10, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
between the first step (101) and the second step (102), the first fluid (11) is pre-cured.
12. The method according to any one of claims 1 to 3,
it is characterized in that the preparation method is characterized in that,
in the second step (102), a separating fluid (9) is applied to the imprint template (3), which reduces the adhesion of the first fluid (11) to the imprint template (3).
13. The method of claim 12, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
as the spacer fluid (9), an offset lithographic wetting agent is used.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19195536.8 | 2019-09-05 | ||
| 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 |
|---|---|
| CN112440553A CN112440553A (en) | 2021-03-05 |
| CN112440553B true CN112440553B (en) | 2022-04-12 |
Family
ID=67874294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010606521.7A Active CN112440553B (en) | 2019-09-05 | 2020-06-29 | Method for coating and embossing in a printing press |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3789200B1 (en) |
| CN (1) | CN112440553B (en) |
Family Cites Families (5)
| 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 |
-
2019
- 2019-09-05 EP EP19195536.8A patent/EP3789200B1/en active Active
-
2020
- 2020-06-29 CN CN202010606521.7A patent/CN112440553B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3789200B1 (en) | 2021-08-11 |
| CN112440553A (en) | 2021-03-05 |
| EP3789200A1 (en) | 2021-03-10 |
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