DE202006005296U1 - Device for stamping foil printing - Google Patents

Abstract

contraption for the Embossed foil print on Sheet, with at least one applicator for imagewise coating a sheet with an adhesive and a coating unit for transmitting imaging Layers of a transfer film on the sheet, the Coating a counter-pressure cylinder and a transfer cylinder contains and the transfer film is passable around the transfer cylinder, such that the imaging layer in the region of the adhesive provided with image areas adhered to the sheet and lifted off the transfer sheet is, characterized in that a coating machine a Film transfer module (F) for carrying out the embossing foil printing wherein in the coating machine a feeder (AN), a Boom (AU) and at least two work units in the manner of for one Sheet processing press configured paint modules (L) are provided.

Description

The The invention relates to a device for stamping foil printing in a coating module, the one device for the transfer of imaging layers of a carrier film on printed sheet includes.

It is known to produce metallic layers on printed sheets by means of a film transfer process. So is in the EP 0 569 520 B1 a printing material and a printing apparatus using this material are described. In this case, a sheet-processing machine is shown, which has a feeder and a boom, between two units printing units and a coating unit are arranged. In at least one of the printing units, an adhesive pattern is applied by means of the planographic printing process. This adhesive pattern is applied in a cold printing process and has a specific imaging subject. In the printing unit following the coating unit with a counter-pressure cylinder and a transfer cylinder, a film guide is provided, in which a film strip or a film is passed through a film roll between the impression cylinder and transfer cylinder. The foil strip is rewound on the outlet side after leaving the coating unit. The transfer film has a carrier layer on which imaging layers such as metallic layers, for example of aluminum, can be applied.

At the Transport of press sheets through the printing unit will print each sheet provided with an adhesive pattern and in communication with the film material brought. It goes down the metallic layer a close connection with the areas provided with adhesive on the sheet. After further transporting the print sheet The metallic layer adheres only in the area of adhesive provided pattern. The print sheet is in the coated state designed.

It is known such coating units, for example in printing units of printing presses. As a result, however, the corresponding printing units for the Use to print images blocked. In addition, the conversion of the concerned printing units consuming.

In addition, from the DE 10 2005 008 940 A1 a device for embossed foil printing known. In this device, for example, a paint module of a sheet-fed printing machine is used as a unit for the use of a film transfer module. The film transfer module contains all elements for the film transfer and is therefore difficult to access or can only be used for smaller rolls of film.

task The invention is therefore to provide a device by means of which when using the stamping foil printing flexible use of a printing press is made possible.

The solution This object is apparent from the features of claim 1.

In Advantageously, the transfer film in at least one film transfer module, the at least one paint module of a coating machine preferably downstream, on a counter-pressure cylinder by a transfer cylinder with the printing material in contact brought.

Within the sheet transfer module receiving sheet processing machine the coating unit is preferably placed at the end of the machine. This achieves a particularly simple machine configuration.

In Further development of the invention, the film transfer module in conjunction be provided with a paint module and a printing unit, so that too difficult coating work can be carried out.

Farther can use the film transfer module according to a glue application Paint module also designed as a sheet transport unit Be connected to the printing unit. This allows the foil logistics in this without inking and dampening unit executed Printing unit to be laid.

Further advantageous embodiments The invention will become apparent from the dependent claims.

in the Below, the invention is illustrated in more detail with reference to figures.

there shows:

1 a schematic representation of a device for the film transfer in a paint module,

2 a first coating machine with a film transfer module,

3 a second coating machine with a film transfer module,

4 a third coating machine with a film transfer module. and

5 a fourth coating machine with a film transfer module.

In 1 is a film transfer module F a paint module L directly upstream. The paint module L, in turn, a printing unit D can be arranged directly upstream.

On a form cylinder 11 of the film transfer module F upstream paint module L is a recessed blanket or a flexographic printing form fixed. The paint module functions in this embodiment as an applicator for adhesive. A chamber doctor blade system as dosing system 13 thus serves the adhesive metering via a screen or applicator roller 13 and the form cylinder 11 on the substrate. The printing material with adhesive application is fed to the downstream coating module in the form of the film transfer module F.

If a paint module L is converted to the film transfer module F, then in this the anilox roller and the chamber doctor blade system are removed. The form cylinder serves as a transfer cylinder 21 for transfer film 24 , For this purpose, the transfer cylinder 21 at least the film supply roll 22 for fresh transfer film 24 and the foil collecting roll 23 allocated for used transfer film. The transfer cylinder 21 transfers in a transfer gap 6 between the transfer cylinder 21 and an impression cylinder 4 the imaging layer of the transfer film 24 on the in the gripper close to the impression cylinder 4 fixed substrate.

If necessary, the transfer cylinder 21 on the impression cylinder 4 in the conveying direction a calender roll 31 downstream. The calender roll 31 can be designed as an embossing roll.

For special Use cases, e.g. if the substrate is very absorbent and the glue is fast in the printing stock, can in a the paint module L upstream printing unit D a first Layer with adhesive quasi applied as a primer coating,

In the described apparatus for carrying out the stamping foil printing, the film supply roll is 22 assigned to the respective film transfer module F on the page of sheet feeding. The foil supply roll 22 has a rotary drive. The rotary drive is used for continuous regulated feeding of the unused film web 24 the transfer film to the film transfer module F is required and is therefore controllable. On the downstream side of the film transfer module F is the used film web 24 on a foil collecting roll 23 wound. Again, a drive is provided for the optimized production, which is controllable. Furthermore, tension rollers can be used in the area of the film guide 25 be provided. The tension rollers 25 are the transfer cylinder 21 in relation to the supply and discharge of the film web 24 to and from the transfer gap 6 arranged adjacent. By means of such tension rollers 25 can the film web 24 the transfer film so safe investment compared to the transfer cylinder 21 being held.

The tension rollers are preferred 25 near the transfer gap 6 arranged such that the film web 24 approximately tangential to the surface of the transfer cylinder 21 in the transfer gap 6 is guided. The thus tangential guidance of the film web 24 reduces the friction conditions between the film web 24 and transfer cylinders 21 by a far-reaching minimization of the contact surface between the film web 24 and the surface of the transfer cylinder 21 ,

To the carryover the transfer film on the substrate and, if necessary, subsequent pressing and smoothing is an impression of the film on the substrate or a print with conventional Offset printing ink, alternatively with so-called UV ink, and / or a coating of the imaging coating of the transfer film, for example a UV coating in combination with an excimer drying, feasible.

For this can downstream of the film transfer module F another paint module. For example, with an additional Painting the imaging coating of the transfer film another Gloss increase achievable.

Out This connection results in the following Configurations of a coating machine for stamping foil printing.

In 2 is the basic version of a coating machine shown. It has an investor AN with an investor stack ANS. In the investor AN the required for the printing material supply to the coating machine and known devices are integrated.

Farther is a paint module L with a metering device for a coating medium provided to apply the adhesive.

the Subsequent to the paint module L, a film transfer module F is provided, in which the stamping foil pressure accomplished becomes. The film transfer module F obviously has the same basic configuration on how the paint module L.

Finally is still provided a boom AU, in which the coated printing sheet can be stacked on a delivery pile AUS.

By means of such Beschichtungsma In the so-called offline mode, presses can be produced by embossing foil printing without a press being restricted in their function. In addition, by means of this machine, a coating of printed or precoated printed sheet done, the embossing film layer comes to lie advantageously on the surface of the sheet and thus has a good gloss effect.

In 3 is a modified version of a coating machine after 2 shown. It also has a feeder AN and a boom AU. Herein, however, a paint module L for adhesive application downstream of a printing unit D.

the Subsequent to the lacquer module L, a foil transfer module F is again arranged provided in which the stamping foil pressure accomplished becomes.

These Coating machine allows printing sheets by means of stamping foil printing to be coated, e.g. in the trained as an offset printing unit Pre-treat printing unit D. This may be significant if precoated or printed sheets be processed, their surface protected or on the stamping foil coating must be prepared. Similarly, a pre-coating on a raw bow from possibly highly absorbent Material to be provided for improved adhesive acceptance.

In the printing unit D, the for various printing or coating processes can be configured, can Process steps both as printing, as well as coating as well mechanical machining operations accomplished become.

In 4 a further modified version of a coating machine is shown. This embodiment demonstrates how the embodiment 3 an investor AN, a boom AU, a paint module L for the adhesive application, a printing unit D and a film transfer module F on.

Here is the printing unit D but as a carrier for film rolls 22 . 23 educated. The printing unit is designed for this purpose without ink or dampening unit, while the sheet guiding functions are completely provided. The transfer foil 24 is as described by the film roll 22 to the film transfer module F and from there back to the film roll 23 guided.

The arrangement is so very compact and allows the inclusion of larger film rolls than in the variants 2 and 3 is possible. Likewise, the handling of the film is solved both ergonomically in the exchange of roles and when retracting the film web in the film transfer module F.

through of the printing unit D can Intermediate steps after the adhesive application are made. in this connection come drying processes or a mechanical treatment of the sheet in question. The printing unit D is provided with directions for drying before or for recording of facilities for prepared the mechanical treatment of bow.

In 5 Finally, another version of a coating machine based on the embodiment according to 2 shown. This embodiment has a feeder AN, a boom AU, a paint module L for the adhesive application, downstream of this a film transfer module F and this downstream a further paint module L on.

through Such a coating machine can be a printing material in Offline mode, i.e. decoupled from a printing press, with a stamping foil print and in the subsequent process stage with a further coating be provided. As additional Coatings include gloss coatings, conformal coatings or coatings with color effects in question. Likewise, the surface of the Substrate with mechanically generated or generated via shift orders and profiling effects.

4

Impression cylinder

6

transfer nip

11

form cylinder

12

applicator roll

13

dosing

21

transfer cylinder

22

Film supply roll

23

Foil composite role

24

sheet

25

idler

31

calender roll

F

Foil transfer module

D

printing unit

L

coating module

AT

investor

AU

boom

Claims (11)

Apparatus for embossing foil printing on printed sheets, comprising at least one applicator for imagewise coating a printing sheet with an adhesive and with a coating unit for transferring image-forming layers from a transfer film to the printing sheet, the coating unit containing a counter-pressure cylinder and a transfer cylinder and the transfer film being guided around the transfer cylinder is such that the imaging layer in the region of the adhesive provided adhered to image areas on the sheet and is lifted off the transfer sheet, characterized in that a coating machine comprises a film transfer module (F) for performing the embossing film, wherein in the coating machine, a feeder (AN), a boom (AU) and at least two working units in the type of paint modules (L) configured for a sheet-fed printing press are provided. Device according to claim 1, characterized in that that the investor (AN) a paint module (L) for the adhesive application and this a film transfer module (F) based on at least one Shaped cylinder provided paint modules is arranged downstream. Device according to claim 1, characterized in that that the investor (AN) a printing unit (D), this a paint module (L) for the Adhesive and this a film transfer module (F) on the basis of a subordinate at least provided with a form cylinder paint modules is. Device according to claim 3, characterized in that that the printing unit (D) is an offset printing unit. Device according to claim 1, characterized in that that the investor (AN) a printing unit (D), this a paint module (L) for the Adhesive and this a film transfer module (F) on the basis of a subordinate at least provided with a form cylinder paint modules is. Device according to claim 1, characterized in that that the investor (AN) a paint module (L) for the adhesive application, this a printing unit (D) and this a film transfer module (F) on the Base of a provided with at least one form cylinder paint module is subordinate. Device according to claim 6, characterized in that in that the printing unit (D) comprises a sheet guiding device, a sheet treatment device and a device for receiving film rolls. Device according to claim 7, characterized in that that the printing unit (D) has a device for drying and / or a Device has mechanical arc treatment. Device according to claim 1, characterized in that that the investor (AN) a paint module (L) for the adhesive application, this a film transfer module (F) based on at least one forme cylinder provided paint modules and this another paint module (L) downstream is. Apparatus according to claim 1 to 9, characterized in that in the film transfer module (F) an applicator roller and a metering system of the forme cylinder are removably arranged and that the forme cylinder by means of a smooth compressible pressing relation to the transfer cylinder ( 21 ) is convertible. Apparatus according to claim 10, characterized in that the pressing reference as a partial surface of the cylindrical surface portion of the transfer cylinder ( 21 ) of the film transfer module (F) covering surface element on the transfer cylinder ( 21 ) or one of the transfer cylinder ( 21 ) supported fabric is positionable attachable.