DE102009000445A1 - Method and device for coating and embossing a printing substrate in a processing machine - Google Patents

Abstract

The invention relates to a method and a device for coating and embossing a printing substrate in a processing machine. The object of the invention is to provide a method and a device that the processed substrate receives an appreciation or a refinement. This is achieved by coating the surface of the printing material with a lacquer layer in a first gap 12 comprising a lacquer-carrying cylinder 2 with at least one metering device 9 and a printing material 5 carrying a printing material, and then in a downstream second gap 13 a cylinder 2 carrying an embossing mold 11 and a counter-pressure cylinder 5 carrying the printing material, in which the printing material is coated with a UV varnish in the first gap 12, then in the second gap 13 into the on the surface the printing material located, not yet polymerized coating layer is embossed and that subsequently the coating layer is polymerized.

Description

The The invention relates to a method and a device for coating and embossing a printing material in a processing machine according to the preambles of the independent claims. The Process and the device are processed in a printing materials Printing machine or a painting machine, in particular for Sheet material, usable.

A procedure and a device of this kind are made DE 198 26 974 A1 known, which allow the production of embossed structures on a sheet or web-shaped substrate in the inline process of a printing press. Starting from at least one color print applied to the printing substrate, the printing substrate is then painted, in particular by means of an aqueous dispersion paint. After varnishing, the varnish layer present on the printing substrate is dried during the transport of the printing substrate and subsequently embossed in the printing ink layer and the varnish layer bearing substrate.

The device after DE 198 26 974 A1 comprises a first coating unit, which is arranged downstream of the printing units, and a finishing unit downstream of the first coating unit, which can be a second coating unit. Between the first coating unit and the finishing station, a dryer is preferably arranged to ensure that the printed and varnished surface of the sheet is dried before the mechanical processing (embossing) in the finishing station. The finishing station includes a stampable on a first cylinder, such as a forme cylinder, embossing plate. The die works against ei ne two-layer elastic embossing pad, which is on a cooperating with the first cylinder second cylinder, such as a counter-pressure cylinder, can be clamped. The coating material used is in particular water-based dispersion varnish.

task The invention is a method and an apparatus of the initially to create said type, wherein in an inline process, at least formed through the steps of coating and embossing, the process to be processed Substrate receives an appreciation or a refinement.

The Task is by the training characteristics of the independent Claims 1, 2 and 11 solved. further developments result from the dependent claims.

One The first advantage lies in the fact that in a processing machine Inline the surface of a substrate, for example of sheet material, coated with a varnish layer and after in which the paint layer bearing substrate is embossed. It is used for improved generation of matt / gloss effects as well to improve the feel of the substrate as a varnish layer Ultraviolet (UV) lacquer coated on one side of the substrate (Applied). The lacquer layer can be full or partial be applied to the substrate. Subsequently, will in the on the surface of the printing material located, not yet polymerized, d. H. still relatively moist, paint layer and then the embossed lacquer layer is embossed polymerized. For polymerization, the embossed lacquer layer temporarily exposed to ultraviolet (UV) radiation / drying, so that the lacquer layer provided with an embossing in dries or hardens for a very short time. simultaneously the embossed structure is fixed.

By the processing of UV varnish can - with reference for offset printing - preferably higher layer thicknesses be applied to the substrate, so that improved matt / gloss effects can be achieved and combined with the additional Embossing, the substrate can receive an appreciation. It may preferably be inline before coating the substrate with varnish, subsequent embossing and subsequent Hardening / drying of the substrate already before with a Print, preferably a multi-color print and / or at least one Lacquer layer, to be coated.

As a second advantage, it can be mentioned that the working method can be carried out in a processing machine with at least one printing unit and at least one coating unit or at least two coating units. In this case, a printing unit can also fulfill the function of a coating unit, as for example DE 197 29 985 A1 or DE 10 2005 010 207 A1 is known. Alternatively, the working method can be carried out in a processing machine with exclusively coating units, ie at least two coating units. In this case, the coating layer is applied to the substrate in a first coating unit and then is coined in the downstream, second coating unit. Subsequently, the lacquer layer (full or partial) is polymerized.

Advantageously, the processing machine is designed for processing sheet material and comprises sheet guiding cylinders for sheet transport. Here, the sheet guiding cylinders with respect to a single-size plate / plate cylinder may be formed in one-size or one-size-one, in particular double-size (½-turn), (1/3-turn), etc., including their combinations within the processing machine. Likewise, the sheet guiding cylinder may have at least one lateral surface, which - be based on a theoretical cylinder diameter - is designed as a solid cylinder or preferably in multi-ply formation within the theoretical cylinder diameter arranged lateral surfaces comprises.

When Sheet material can be cardboard, foil or paper. Such a processing machine can in Perfecting or in perfecting.

The Invention will hereinafter be an embodiment be explained in more detail. Here are shown schematically:

1 a processing machine with printing / coating units and sheet guiding cylinders,

2 a processing machine with coating units and sheet guiding cylinders,

3 a processing machine with printing / coating units, sheet guiding cylinders and an embossing device,

4 an optionally operable as a coating unit printing unit.

A processing machine for sheet material, in 1 shown as a rotary printing press, includes several printing units A for the Perfecting and for the beautiful-Wderdruck, shown here in series construction (aggregate construction). The printing units A essentially each comprise a plate / forme cylinder 2 and a blanket cylinder 1 , an inking unit 3 and if necessary, a dampening unit 4 , The blanket cylinder 1 is with a sheet material in the conveying direction 7 transporting sheet guiding cylinder 5 with sheet holding means, here as impression cylinder 5 shown, in operative connection.

For the multicolor printing preferably a plurality of identical offset printing units A are arranged in a row construction, wherein between the sheet guiding cylinders 5 (Impression cylinder 5 ) adjacent printing units A (if necessary: and / or coating units B, C) further sheet guiding cylinder 6 as a transfer cylinder 6 can be arranged for the sheet transport through the processing machine. The sheet guiding cylinder 6 can have at least one lateral surface, which - based on a theoretical cylinder diameter - is formed as a solid cylinder or, for example, in multi-sized training within the theo retical cylinder diameter arranged lateral surfaces include.

In conveying direction 7 the sheet material is the printing unit A and the printing units A downstream of a first coating unit B. This first coating unit B is in the conveying direction 7 a second coating unit C downstream. The Lackwerke B, C are preferably identical in construction and each include a plate / forme cylinder 2 , the ever a metering device 9 is assigned in operative connection. For example, the metering device 9 a chambered doctor blade with rastered application roller include. Alternatively, roll mills (squeeze roller or scoop roller principle) can be used as metering device 9 be used. Furthermore, such a coating unit B, C each one with the plate / forme cylinder 2 operatively connected impression cylinder 5 ,

In conveying direction 7 of the sheet material can at least one printing / lacquer gap of a printing unit A (alternatively at least one coating unit B, C) a radiation / drying source 8th , for example, in association with a small distance to the impression cylinder 5 to be subordinate. The sheet material is on the sheet guiding cylinder 5 fixed to sheet holders. The radiation / drying source 8th is in its effect on that on the sheet guiding cylinder 5 directed resting sheet material. The radiation / drying sources are preferred 8th switching and signal technology coupled with a machine control of the processing machine.

Between the two coating units B, C can for sheet transport several sheet guiding cylinder 5 . 6 be arranged. It can be a transfer cylinder 6 an impression cylinder 5 be adjacent, which is not part of a printing / coating unit A, B, C. Such an impression cylinder 5 can be a radiation / drying source 8th be arranged adjacent in association with a small distance. Alternatively, instead of the impression cylinder 5 a transfer cylinder 6 be provided. With reference to a single-sized plate / plate cylinder 2 are in the present example, the sheet guiding cylinder (impression cylinder 5 , Transfer cylinder 6 ) double-sized. The bow guide cylinders 6 can ever have a known sheet guiding device 10 be associated with, for example, pneumatic support.

In the present example, the first coating unit B comprises a first gap 12 passing through a paint-carrying cylinder 2 , here as a plate / form cylinder 2 shown with at least one metering device 9 and one, a substrate, here sheet material, leading impression cylinder 5 is formed. In this first gap 12 For example, the surface of the substrate can be fully or partially coated with a lacquer layer. In conveying direction 7 follows a subordinate, second gap 13 , formed by a an embossing mold 11 carrying cylinder 2 , here as a plate / form cylinder 2 shown, and a printing material leading impression cylinder 5 of a second coating unit C. In this gap 13 can in the Lacquer layer to be embossed.

The first gap 12 can be arranged in a first coating unit B or, depending on the machine configuration, alternatively in a printing unit A, which is suitable for coating a printing substrate with lacquer. 4 shows an example of DE 10 2005 010 207 A1 known printing unit A, which can be operated either as a coating unit B. This is at the contact point of plate / form cylinder 1 and blanket cylinder 1 carried out a separation. By means of the metering device 9 UV varnish is fed to the blanket cylinder and applied by this to the substrate.

Depending on the machine configuration is thus the second gap 13 in one of the first coating unit B or a printing unit A in the conveying direction 7 arranged downstream of the printing substrate second coating unit C. In conveying direction 7 is the second gap 13 a radiation / drying source 8th downstream. This radiation / drying source is preferred 8th the impression cylinder 5 the coating unit C assigned at a distance adjacent. Alternatively, such a radiation / drying source 8th in a subsequent dryer section, formed from sheet guiding cylinders 5 . 6 or a circulating, transporting system having bow transport system (preferably designed as a traction mechanism) may be arranged.

Depending on the machine configuration, in the conveying direction 7 between the first gap 12 and the second gap 13 a cylinder leading to the substrate 5 or 6 adjacently associated radiation / drying source 8th be arranged.

The second gap 13 co-forming impression cylinder 5 can have at least one incompressible mantle surface when processing a relatively compressible printing material, for example cardboard. In a training as a double-sized impression cylinder 5 this has two incompressible mantle surfaces. On each of an incompressible lateral surface, an incompressible elevator can be arranged, which forms the mantle surface. The also the second gap 13 co-forming plate / form cylinder 2 carries the stamping mold 11 ,

The second gap 13 co-forming impression cylinder 5 may have at least one compressible shell surface in the processing of a relatively incompressible printing material, such as paper. In a training as a double-sized impression cylinder 5 this has two compressible shell surfaces. Likewise, the second gap 13 co-forming impression cylinder 5 have at least one incompressible lateral surface and a compressible elevator arranged thereon. Such an elevator contains at least one elastomer. The plate / form cylinder 2 carries the stamping mold 11 ,

In 2 two coating units B, C are shown, which are part of a painting machine. Their structure is essentially analogous to the machine configuration according to 1 ,

When arranging the stamping mold 11 on the plate / forme cylinder 2 of the second coating unit C is the metering device 9 at least in one contact point 15 from which the stamping mold 11 carrying plate / form cylinder 2 separated. Alternatively, the metering device 9 be temporarily removed from the second coating unit C. In a further embodiment, the second coating unit C can only by a the mold 11 carrying plate / form cylinder 2 and a sheet guiding cylinder 5 be formed.

At least one of the second gap 13 in the conveying direction 7 downstream radiation / drying source 8th is one of the sheet guiding cylinders 5 ; 6 assigned at a distance adjacent. In this case, the at least one radiation / drying source 8th the second gap 13 forming impression cylinder 5 in the conveying direction 7 be subordinate. Likewise, in the conveying direction 7 several sheet guiding cylinders 5 ; 6 the second gap 13 be downstream and at least one of the sheet guiding cylinder 5 . 6 is at least one such radiation / drying source 8th assigned at a distance adjacent.

In 3 is shown another education. Hereinafter, a coating unit B is disclosed, which has a first gap 12 passing through a paint-carrying cylinder 2 , here as a plate / form cylinder 2 shown with at least one metering device 9 and one, a substrate, here sheet material, leading impression cylinder 5 is formed. In this gap 12 For example, the surface of the printing substrate can be coated with a lacquer layer, in particular UV lacquer, over the entire surface or partially. In conveying direction 7 follows a subordinate, second gap 13 , formed by a an embossing mold 11 carrying cylinder 2 which is a plate / forme cylinder 2 may be, and the printing material (sheet material) leading impression cylinder 5 , In the gap 13 forms the cylinder 2 with stamping mold 11 with the impression cylinder 5 an embossing device 14 which in the conveying direction 7 directly to the impression cylinder 5 downstream of the coating unit B. For this purpose, the impression cylinder 5 a sheet guiding device 10 be assigned. As required, the embossing device 14 , in the sheet exit or vertically below the axis or in the arching of the impression cylinder 5 be arranged. In 3 is the embossing device 14 shown in the archway.

Alternatively, instead of the coating unit B, a printing unit A can fulfill the function of a coating unit, as may be the case, for example DE 197 29 985 A1 or DE 10 2005 010 207 A1 is known.

The embossing device 14 can at least another sheet guiding cylinder 5 ; 6 or a cantilever (not shown). Likewise, the embossing device 14 ie the second gap 13 , a radiation / drying source 8th in the conveying direction 7 be subordinate. The radiation / drying source 8th can one of the embossing device 14 immediately downstream sheet guiding cylinder 5 ; 6 assigned at a distance adjacent and / or arranged in a boom for sheet material.

If necessary, the plate / form cylinder 2 with stamping mold 11 a washing device on / off adjustable for the purpose of cleaning the embossing mold 11 be assigned.

The operation is as follows: The sheet material is preferably by means of the sheet guiding cylinder 5 . 6 in the conveying direction 7 transported and in a first gap 12 comprising a paint-carrying cylinder 2 with at least one metering device 9 and a, the sheet material leading impression cylinder 5 fully or partially coated with a varnish layer. The paint used is a UV varnish. Thereafter, in a downstream second gap 13 comprising an embossing mold 11 carrying cylinder 2 and a sheet material leading impression cylinder 5 , embossed in the sheet material carrying the lacquer layer. In this case, the not yet polymerized UV lacquer layer is embossed on the surface of the sheet material located. Subsequently by means of at least one radiation / drying source 8th the paint layer polymerized. If necessary, the sheet material in a conveying direction 7 Subordinate sheet delivery are fed and stored on a delivery pile.

1

Blanket cylinder

2

Plate / form cylinder

3

inking

4

dampening

5

Impression cylinder (Sheet guiding cylinder)

6

transfer cylinder (Sheet guiding cylinder)

7

conveying direction

8th

Radiation / drying source

9

metering

10

sheet guiding device

11

stamping die

12

first gap

13

second gap

14

embosser

15

contact point

A

printing unit

B

first coating unit

C

second coating unit

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19826974 A1 [0002, 0003]
• - DE 19729985 A1 [0008, 0031]
• - DE 102005010207 A1 [0008, 0022, 0031]

Claims (11)

Process for coating and embossing a printing substrate in a processing machine, wherein in a first gap ( 12 ) comprising a paint-carrying cylinder ( 2 ) with at least one metering device ( 9 ) and one, a substrate leading impression cylinder ( 5 ), the surface of the printing material is coated with a lacquer layer and then in a downstream second gap ( 13 ) comprising an embossing mold ( 11 ) carrying cylinder ( 2 ) and an impression cylinder leading to the printing material ( 5 ), in which the printing layer-bearing substrate is embossed, characterized in that in the first gap ( 12 ) the printing substrate is coated with a UV varnish, which is then in the second gap ( 13 ) is embossed in the on the surface of the substrate located, not yet polymerized coating layer and that subsequently the coating layer is polymerized. Device for coating and embossing a printing material in a processing machine, wherein in a first gap (FIG. 12 ) comprising a paint-carrying cylinder ( 2 ) with at least one metering device ( 9 ) and one, a substrate leading impression cylinder ( 5 ), the surface of the printing material is coated with a lacquer layer and then in a downstream second gap ( 13 ) comprising an embossing mold ( 11 ) carrying cylinder ( 2 ) and an impression cylinder leading to the printing material ( 5 ), in which the printing layer-bearing substrate is embossed, characterized in that the first gap ( 12 ) is arranged in a first coating unit (B) or a printing unit (A) and the printing substrate is coatable with a UV lacquer that the second gap ( 13 ) in a first coating unit (B) or printing unit (A) in the conveying direction ( 7 ) of the printing material downstream second coating unit (C) is arranged and that the second gap ( 13 ) a radiation / drying source ( 8th ) in the conveying direction ( 7 ) is subordinate. Apparatus according to claim 2, characterized in that in the conveying direction ( 7 ) between the first gap ( 12 ) and the second gap ( 13 ) a cylinder leading to the printing stock ( 5 ) adjacently associated radiation / drying source ( 8th ) is arranged. Apparatus according to claim 2, characterized in that in the processing of a compressible printing material of the second gap ( 13 ) forming impression cylinders ( 5 ) has at least one incompressible lateral surface. Device according to claim 4, characterized in that that on the incompressible lateral surface an incompressible Elevator is arranged. Apparatus according to claim 2, characterized in that in the processing of an incompressible printing material of the second gap ( 13 ) forming impression cylinders ( 5 ) has at least one compressible lateral surface. Apparatus according to claim 2, characterized in that in the processing of an incompressible printing material of the second gap ( 13 ) forming impression cylinders ( 5 ) has at least one incompressible lateral surface and a compressible lift of at least one elastomer disposed thereon. Apparatus according to claim 2, characterized in that the said second gap ( 13 ) downstream radiation / drying source ( 8th ) a sheet guiding cylinder ( 5 ; 6 ) is assigned adjacent at a distance. Apparatus according to claim 2 and 8, characterized in that the radiation / drying source ( 8th ) the second gap ( 13 ) forming impression cylinder ( 5 ) in the conveying direction ( 7 ) is subordinate. Apparatus according to claim 2, characterized in that the embossing mold ( 11 ) carrying plate / form cylinder ( 2 ) is associated with a washing device off / adjustable. Device for coating and embossing a printing material in a processing machine, wherein in a first gap (FIG. 12 ) comprising a paint-carrying cylinder ( 2 ) with at least one metering device ( 9 ) and one, a substrate leading impression cylinder ( 5 ), the surface of the printing material is coated with a lacquer layer and then in a downstream second gap ( 13 ) comprising an embossing mold ( 11 ) carrying cylinder ( 2 ) and an impression cylinder leading to the printing material ( 5 ), in which the printing layer-bearing substrate is embossed, characterized in that the first gap ( 12 ) is arranged in a first coating unit (B) or a printing unit (A) and the printing substrate is coatable with a UV lacquer that in the conveying direction ( 7 ) the second gap ( 13 ) formed by a die ( 11 ) carrying cylinder ( 2 ) and the printing material leading Ge gendruckzylinder ( 5 ), an embossing device ( 14 ), which in the conveying direction ( 7 ) directly to the impression cylinder ( 5 ) of the first gap ( 12 ) in the coating unit (B) or in the printing unit (A) is arranged downstream.