EP2763851A2

EP2763851A2 - Print finishing method and corresponding device

Info

Publication number: EP2763851A2
Application number: EP12778217.5A
Authority: EP
Inventors: Peter Barth
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-06
Filing date: 2012-10-04
Publication date: 2014-08-13
Anticipated expiration: 2032-10-04
Also published as: US20140246139A1; EP2763851B1; DE102011054221A1; WO2013050028A2; WO2013050028A3; CN103974830A

Abstract

The invention relates to a print finishing method, comprising the steps of feeding sheet-type printing products, laminating, coating and foil-stamping the sheet-type printing products (D), the steps of lamination, coating and foil-stamping being carried out in treatment modules and the printing product (D) to be finished being first detected and aligned in every treatment module. The invention further relates to a print finishing machine for sheet-type printing products (D), comprising a sheet-conveying system (11) for the sheet-type printing product (D); a laminating device for laminating the printing product (D) with a laminating film; a coating device for coating the printing product (D) with a coat, and a foil-stamping device for transferring a transfer layer which adheres to a carrier film onto the printing product (D) in places intended to be imprinted. The laminating device (2), the coating device (3) and the foil-stamping device (4) each contain at least one section of the conveying system (11) and the sections of the conveying system are suction feedboards (21, 31, 41).

Description

DESCRIPTION

Print finishing process and device therefor

The invention relates to a print finishing method comprising the steps of supplying sheet-shaped printed products, laminating, painting and foil stamping, wherein the processing of laminating, painting and foil stamping is modular.

Furthermore, the invention relates to a print finishing machine for sheet-shaped printed products D with a conveying means for the printed product D, a

Laminating device for laminating the printed product D with a

Laminating film, a painting device for painting the printed product D with paint and a film embossing device for transmitting a on a

Carrier film adhering transfer layer at the intended places for printing on the printed product D.

Such a printing finishing machine is known from DE 10 2009 020 753 A1. This finishing machine has a sheet conveying system in a base machine with at least one interface along the

Sheet conveyor with coupling structures for releasably coupling a replaceable finishing module. At this print finishing machine, a base machine provided with several coupling points at the factory may be provided, wherein at the provided coupling points then a

Foil embossing module, a painting module, a relief embossing module, a punching module and a printing module and so on can be coupled. Although it is thus possible to configure a print finishing machine so that a desired print finishing product can be produced with it, however, both the conversion with a necessary crane device is time-consuming and dangerous and also is supplied by the roll transfer of the

Printed product requires a high-precision alignment of each coupled to the base machine finishing module. Consequently, a conversion of this print finishing machine for small and very small print series (single copies

replacement blade up to some 100 copies) at competitive prices not possible.

However, since the printed products are increasingly presented via digital media and correspondingly palpable printed products undergo a significant reduction in the number of copies, but at the same time these printed products are made more individual, flexible and expensive, there is a great need to create individually finished print products even in the smallest editions economically. It is therefore important, even in the Druckverdelung exclusively on digital

Set printing process and largely avoid a machine conversion and / or technically very simple.

Furthermore, from DE 100 47 394 A1 a modular printing machine system is known in which a first printing presses with different second

Printing machines can be coupled. The modular press system processes sheet-shaped printed products from a sheet feeder over a sheet feeder

Sheet delivery is transferred to a transport device of the second printing machine and there is output on the sheet delivery after the print finishing. Also for this printing press system retrofitting is possible only with considerable time, labor and cost. A

Changing from print job to print job is illusory. Rather, the modular system should keep the manufacturer's manufacturing costs low.

Further, DE 692 07 751 T2 shows a based on the offset printing principle cold foil stamping method, in which always a pressure plate for the indirect transfer of the adhesive is required. In this case, a combination of printing press modules is shown, with which various work steps, for example gold plating, on a sheet-shaped printed product can be carried out. A conversion of the entire machine by

Changing the order of the printing press modules is not possible here at reasonable cost due to the size and the adjustment of the machines. JP 61 141555 A shows only a coating device

(Varnishing machine) in a printing process for sheet-shaped printed products.

EP 0 264 347 A2 shows a printing process for endless paper webs, in which the paper web is detected and aligned. Starting from DE 10 2009 020 753 A1, therefore, the invention is the

The object of the invention is to provide a printing finishing method and an apparatus therefor, with which printing enhancement can be produced economically and as quickly as possible, even with very short runs, up to individual printing. This object is achieved with a print finishing method according to claim 1 and a print finishing device according to claim 5.

By capturing and aligning the print product to be finished with each processing module, it is achieved that the transition from one module to the next module does not require a high-precision alignment, but only a secure transition of the printed product from one module to the next with a specified dimensional tolerance is required. Thus, the

Coupling elements for the modules be much easier and thus designed to be faster to use. Accordingly, a conversion of the sequence of modules in such a print finishing process is much faster and thus economically possible. Preferably, the detection and

Alignment on a suction belt table belonging to each processing module.

Due to the fact that the processing modules are standardized

Transfer interfaces are reversed in their order, the processing steps laminating, painting and foil stamping can be performed in any order.

In order to avoid a conversion of the module sequence for individual printed products or for very small runs of several tens of pieces and / or to perform a finishing process, for example the foil embossing twice, Individual printed products (D) are removed from a module and fed to an upstream module.

According to the device is the special feature of the invention

Print finishing machine in that the modular division into

Laminating device, painting device and film embossing device is designed so that each module associated with portions of the conveying means for the printed product in the form of Saugbandtischen. The Saugbandtische serving as a conveyor can also be designed multi-membered within a module, if processing roller pairs,

Aligning devices or the like require this. In preferred

Design, the laminating device, the painting and the film embossing device are formed with their sections of the funding as modules with standardized transfer interfaces, each

Conveyor section upstream of the respective print finishing

Printed product sensors and aligners for determining the position and orientation of the printed product D have and have the transfer interfaces mechanical and electrical centering and coupling elements.

Accordingly, the three are mainly driven

Print finishing process in a print finishing machine combined in a modular manner. Accordingly, these three finishing processes can be performed in a single operation in a row and, if necessary, the order of processing can also be changed. By provided on the respective Saugbandtisch before each refining step Druckproduktsensoren and -richter is a high positional loyalty and

achievable repeatable positioning in the individual print finishing processes.

Preferably, the printed product sensors and aligners 22, 32, 42 have side, sheet format adaptable side stops and bow front and side panels

Beet edge sensors or other known from the graphic arts Bogenausnchteverfahren on. The sheet front and rear edge sensors will determine the length of the sheet format (printed product) and thus the exact Positioning in working direction determined. The side stops, which can be set automatically or manually adjustable to the width of the sheet format, in contrast, provide the exact alignment of the printed product flow laterally to the working direction. If the standardized transfer points 5 have a first coupling element with protruding pin on one side of each module and a second coupling element with mating pin receptacles on the other side of the modules, quickly coupling and decoupling module transitions are realized. In modules that can be moved on wheels, for example, they can be moved in the desired order on the floor of the production hall and connected to one another via the pin coupling elements. The pins, possibly with centering, thereby allow a sufficiently accurate alignment of the modules coupled to each other.

If a vacuum-free range of 1 cm to 5 cm is provided at the end and beginning of the Saugbandtische 21, 31, 41, a clean transfer of the printed product to the next module or to the destacker is possible because adhesion of the printed product is avoided at the conveyor belt deflection ,

By providing a handling means for individual return of sheet-shaped printed products D, which can convey a printed product D back to an upstream module after passing through a module, it becomes possible to print individual products in a different order than the present order of the three printing finishing modules

to process the returned printed product a second time through a print finishing process.

Hereinafter, an embodiment of the invention will be described in detail with reference to the accompanying drawings.

It shows: 1 shows a printing finishing machine according to the invention in a schematic diagram.

In Fig. 1, a printing finishing machine 1 is shown in a schematic diagram. The features described below are, as far as appropriate, dealt with in the working direction designated by arrow X in FIG.

The Durckveredelungsmaschine 1 consists of three modules, namely a laminating device 2, a painting device 3 and a

Foil embossing device 4. The devices 2, 3, 4 are modular and can be reversed in their order. In the exemplary embodiment illustrated here, the modules are coupled to one another in the working direction X as described above. Upstream of the first module, here the laminating device 2, a use feeder 7 is arranged. Downstream of the last module, here the film embossing device 4, a stacker 8 is arranged. In the utility feeder 7 a to be refined, sheet-shaped printed product D is stored. In the stacker 8, the finished printed product D is stored. Between benefit feeder 7 and stacker 8, a conveyor 1 1 is formed, which leads linearly through the three modules as its component. The conveyor 1 1 is realized in the form of Saugbandtischen.

The conveyor 1 1 belonging to the laminating device 2 has a two-part first suction belt table 21. In this case, downstream of the use feeder 7 on the first suction belt table 21, a first printed product sensor and aligner 22, for example in the form of a sheet leading edge and / or

Arc trailing edge sensor arranged with sheet orientation. Downstream of the print product sensor and aligner 22 is a

Adhesive applicator 23 is provided, which applies a short trace of adhesive or a drop of adhesive on the printed product D.

Downstream of the adhesive applicator 23 is provided above the first Saugbandtisches 21 a feed means 24 for laminating film, which has a unspecified transfer cylinder, which advances the pre-cut to a particular format Kaschierfolienformate 26 and order 180 ° on the lateral surface of the transfer cylinder in response to the signal given by the printed product sensor and -ausrichters 23 accurately hangs on the required on the first Saugbandtisch 21 printed product D. At this time, the laminating film size 26 coated with a thermally reactive adhesive passes an infrared heater 25 and becomes

heated without contact, whereby the adhesive is activated.

The Kaschierfolienformate 26 are stored depending on their format in individual stacks in film magazines 27, wherein the

Foil magazines 27 can be changed programmatically by the control unit of the printing finishing machine 1. Thus, a particular Kaschierfolienformat 26 on the respective on the first

Saugbandtisch 21 present printed product D are placed.

Downstream of the supply means 24, a smoothing agent 28 in the form of directed to the laminated film air nozzles and a subsequent pressing means 29 consisting of a pair of rollers is first arranged. At the

Roller pair 29, the first suction belt 21 is interrupted, wherein the finished printed product D is supplied to the first part of the gap of the roller pair 29 and from there to the second part of the first Saugbandtisches 21 is taken. The painting device 3, closes downstream of the laminating device 2 via a transfer interface 5 with centering and coupling elements. The painting device 3 has downstream as conveying means 1 1, a second Saugbandtisch 31, on which the printed product D is further promoted in the working direction X. First, the printed product D reaches a second printed product sensor and aligner 32, where the printed product D is detected and aligned. Downstream of the second printed product sensor and - aligner 32, a paint printhead 33 is arranged, for example, contains two transferal run ink printheads, with which two different paints, such as gloss or matt lacquer or textured / Relieflack on the

Printed product (D) can be applied. The lacquer print heads 33 are attached to traverses transversely to the working direction X above the second suction belt table 31 controlled in accordance with the digital data and positioned laterally over a closed container after each printing or during production breaks. In this "parking position", excess paint is removed from the underside of the print heads and rinsing with acetone and / or paint is carried out downstream of the paint print head 33. Optionally, a leveling aid 34 and subsequently a UV curing device 35 are arranged this UV curing device 35 by a UV light source, in particular LED UV lamp or HD-UV illuminant.

The painted printed product D is then over another

Transfer interface 5 from the second Saugbandtisch 31 to a third

Saugbandtisch 41 passed the subsequent film embossing device 4. Downstream of the transfer interface 5, a third printed product sensor and aligner 42 is arranged on the third Saugbandtisch 41, which detects and aligns the supplied printed product D on the third Saugbandtisch 41.

Downstream of the print product sensor and aligner 42 is a

Adhesive applicator 43 is provided, which is equipped for example with two printheads. The first printhead can apply a low viscosity pressure sensitive adhesive to the printed product D at the locations intended for planographic printing. The second print head 43 delivers an applied adhesive to the print product D at the locations provided for a pseudo-embossing.

Downstream of the adhesive applicator 43 is dependent on it

used adhesive, an adhesive activating means 44, for example, the UV radiation on the adhesive provided

Print product D can give, wherein the adhesive applied to the printed product D still retains a sufficiently adhesive surface.

Downstream of the adhesive activation means 44, a film transfer agent 45 is arranged, wherein the film transfer agent 45 has a transfer roller and a counter-pressure roller opposite this, which form a calender roller pair. The forming gap between the rollers is at transport height of the third Saugbandtisches 41, which is interrupted in the region of the roller pair.

To the transfer roller of the film transfer agent 45, a transfer sheet 46 is passed, which is from a Folienabroller to the transfer roller to a

Foil winding leads. On the film take-up, the carrier film is wound up with the transfer layer not required.

The transfer roller is liftable formed by the counter-pressure roller, so that for transporting the printed product D in the working direction X synchronous transport of the transfer film 46 must be made only if a transfer of adhering to the transfer film 46 transfer layer to the printed product D should take place. When not required transfer, the transfer roller is removed from the platen roller and the transport of the transfer film 46 is stopped. In the next required Folienbedruckung then the transfer roller is moved together with the platen and at the same time the transfer sheet 46 is driven synchronously to the third Saugbandtisch 41. The timing takes place on the basis of the third printed product sensor and -richter 42 detected signals in conjunction with the intended locations for the film printing.

In order to be able to perform both planographic printing and pseudo-embossing with this film embossing device 4, the transfer roller of the film transfer medium 45 is preferably formed with an elastic sheath of low thickness, which also has a place at the points with the applying adhesive

uniform pressure also on the arched raised areas of pseudo-embossing allows. The elastic envelope nestles virtually around the pseudo-embossing and prevented by the elastic yielding crushing or smearing the just applied

Pseudo embossing. Furthermore, it is possible, even on the

Pseudo-embossing to make a transfer layer (film printing), which is pressed by the elastic fitting of the elastically coated transfer roller completely to the pseudo-embossing under uniform pressure. Downstream of the film transfer agent 45, a curing device 47 is arranged, which causes a complete curing of the applied on the printed product D adhesives.

Subsequently, the finished printed product D is delivered to the stacker 8 or handed over to a subsequent further machine.

Furthermore, FIG. 1 shows a handling means 12 which, for example, can be guided along a monorail or a jib in the manner of a handling robot along the working direction X of the printing finishing machine 1. The handling means 12 has a gripper, which can pick up a sheet-shaped printed product D at designated locations, namely at the end of each module and can convey back against the working direction X to the beginning of the module or a module lying in front. Hereby, individual printed products can be processed in a different module sequence than the one currently being constructed or can be passed twice through a print finishing process.

Both the utility feeder 7 and the destacker 8 are likewise each provided with a transfer point 5, so that they can be coupled as separate modules to the three print finishing modules 2, 3, 4 joined together in any order. Alternatively, a manual system could be performed.

The realized in the individual finishing modules

Print finishing steps do not require a printing form but are carried out as a direct coating on the printed sheet. So there are neither printing plates, nor painting plates, embossing cylinders or special embossing tools for embossing required. Consequently, a printed product can be finished without prior tool production and change in the printing finishing machine.

Thus, with the print finishing machine described herein

or the print finishing process a production of high quality Refined printed products can be produced inexpensively and quickly even in very small quantities from 1 to 200.

LIST OF REFERENCE NUMBERS

I print finishing machine

I I conveyors, sheet conveying system

12 handling means

2 laminating device, first module

21 first suction belt table

22 first printed product sensor and aligner

23 adhesive application device

24 feeding means

25 infrared heater

26 laminating film format

27 film magazine

28 smoother

29 pressing means, roller pair

3 painting device, second module

31 second Saugbandtisch

32 second printed product sensor and aligner

33 paint printhead

34 Flow aid

35 UV curing device

4 foil stamping device, third module

41 third suction belt table

42 Third print product sensor and aligner 43 Adhesive applicator

44 adhesive activator

45 film transfer agent

46 transfer foil

47 curing device

5 transfer interface

7 benefit investors

8 stackers

D printed product

X working direction

Claims

P A T E N T A N S P R E C H E

Print finishing process with the steps

Feeding sheet-shaped printed products,

- laminating,

- painting and

Foil stamping of the sheet-shaped printed products (D),

wherein the processing lamination, painting and foil stamping is modular, characterized in that the printed product to be refined (D) is first detected and aligned in each processing module.

2. Print finishing process according to claim 1, characterized in that the detection and alignment on each

Processing module associated Saugbandtisch takes place.

Print finishing method according to claim 1 or 2, characterized in that the processing modules can be interchanged via standardized transfer interfaces in their order.

4. print finishing process according to claim 1, 2 or 3, daduch

characterized in that individual printed products (D) are removed from a module and fed to an upstream module.

Pressing machine for sheet-shaped printed products (D) with sheet conveying system (1 1) for the sheet-shaped printed product (D); a laminating device for laminating the

Printed product (D) with a laminating film;

a painting device for painting the printed product (D) with paint and

a film embossing device for transferring a transfer layer adhering to a carrier film to the printed product (D) at the locations intended for printing,

characterized in that the laminating device (2), the painting device (3) and the film embossing device (4) each comprise at least a portion of the conveying means (1 1) and

the sections of the conveying means Saugbandtische (21, 31, 41).

Printing finishing machine according to claim 5, characterized

in that the laminating device (2), the

Painting device (3) and the film embossing device (4) with their sections of the conveying means (1 1) as modules with standardized transfer interfaces (5) are formed, each

Conveying section (21, 31, 41) upstream of the respective

Print finishing Printed product sensors and aligners (22, 32, 42) for determining the position and orientation of the printed product (D) and the transfer interfaces (5) have mechanical and electrical centering and coupling elements.

Printing finishing machine according to claim 6, characterized

characterized in that the printed product sensors and aligners (22, 32, 42) have lateral sheet format adaptive

Have side stops and Bogenvorder- and Hinterkantensensoren.

Printing finishing machine according to claim 6 or 7, characterized in that the standardized transfer points (5) have a first coupling element with protruding pin on one side of each module and a second coupling element with mating pin receptacles on the other side of the modules.

Printing finishing machine according to claim 6, 7 or 8, characterized in that at the end and beginning of the

Saugbandtische (21, 31, 41) a negative pressure range of 1 cm to 5 cm is provided. Printing finishing machine according to one of claims 5 to 9, characterized in that a handling means (12) for individual return of sheet-shaped printed products (D) is provided, which can convey a printed product (D) after passing through module to an upstream module.