DE102016206668A1 - Method for setting up a processing station of a printing machine - Google Patents

Abstract

The invention relates to a method for setting up a processing station (12) of a printing machine (100). The editing contour of an image is printed with a digital printing station (14). The method is particularly suitable for printing on digital web printing machines labels and cartons (5).

Description

The invention relates to a method for setting up a processing station of a printing press according to claim 1.

State of the art

As punching the cutting is referred to with closed geometric blank forms that can be circular, oval or polygonal and imaginary shapes of all kinds. Also the practices practiced in print finishing, such as punching with punch, corner punching and register punching are counted to this area. The punching takes place against a punching pad or against stamp, in some cases it is also shearing operations. Plastic packaging materials, film material, paper, cardboard, cardboard or corrugated board are mainly punched in sheet format but also in web format. When punching but also creasing lines or blind embossing can be introduced into the benefit. Since the end products are sophisticated packaging in terms of technical and graphic design (such as packaging for cosmetics, cigarettes, pharmacy, food, etc.), special requirements are not only placed on the packaging materials themselves, but are also punching tools for optimum results required with the smallest tolerances and extremely precise and reliable punching machines. For this purpose, on the one hand flat bed punches are known, for example from the EP 2 080 600 A1 ,

In the EP 2 080 600 A1 a flat bed punching module for punching a printing material is disclosed, with an upper crucible and a saucer, wherein the saucer by means of a drive relative to the frame-fixed upper crucible for performing a punching stroke for punching the passing between the upper crucible and the saucer printing substrate is movable. As a result, the saucer is employed on the upper crucible, and the printing material is processed by means of at least one punching tool. The flat bed stamping module has a printing material transport device for guiding the printing material, which is firmly held on the movable saucer. The flatbed punching module can be used in a flat bed punch for processing a printing material web and contribute to a stable web run. Also known are machines in which the upper table is moved against a fixed lower table.

It is also known to operate such punches inline with rotary printing machines. Such a manufacturing system is used for example in the EP 1 731 277 B1 described.

On the other hand, rotary punches are known, for example from the DE 10 2010 026 607 A1 which have at least two rotating tool rolls, which are easily replaceable. Rotary punches can advantageously be operated at high production speeds. A disadvantage of rotary punches are the high acquisition and maintenance costs for the tools. Rotary punches can therefore be operated economically only for orders in medium to high runs.

For cost and environmental reasons, the aim is to get along with the least possible waste in the production of the above-mentioned packaging materials in printing press and punching machine.

If a visible register error occurs, i. If the printed image and the stamping image fall apart, the resulting products no longer meet the quality standard and waste is created. The same problem exists with other processing methods such as e.g. Creasing, embossing, foil embossing.

To correct the register error, the editing tools must be corrected. During the register-accurate alignment of the processing tools continues to be waste.

The EP 1 772 405 B1 discloses an alignment of a stamping station for printed stamping registration marks.

The DE 44 42 411 B4 discloses printing of the stamping contour with laser light absorbing ink for higher energy yield and easier laser control. The laser can undergo digital control from pre-stage data.

task

The object of the present invention is to describe a method for setting up a processing station of a printing press, which reduces the disadvantages of the prior art and the amount of waste.

This object is achieved by a method for setting up a processing station of a printing machine with the features of claim 1.

• – Ermittlung Positionsdaten Bearbeitungskontur eines Druckobjektes, z.B. Etikett, Faltschachtel, aus Vorstufendaten oder Berechnung aus Bilddaten.
• – Drucken zumindest eines Teils der Bearbeitungskontur eines Bildes mit Digitaldruckstation auf Bedruckstoff, d.h. das Bild selbst wird nicht gedruckt. Insbesondere mit der Farbe, welche am reichlichsten zur Verfügung steht, für einen nachfolgenden Auftrag nicht benötigt wird oder einer festlegbaren Standardfarbe.
• – Weitertransport des Bedruckstoffs zur Bearbeitungsstation, z.B. Rillstation oder Stanzstation
• – Passergenaue Ausrichtung der Bearbeitungsstation zur gedruckten Bearbeitungskontur, insbesondere durch den Maschinenbediener.

The method according to the invention serves to set up a processing station of a printing press with a preceding digital printing station and has the following steps:

• - Determination of position data Machining contour of a print object, eg label, carton, from precursor data or calculation from image data.
• - Print at least a part of the processing contour of an image with digital printing station on substrate, ie the image itself is not printed. In particular, with the color that is most abundant, is not required for a subsequent order or a default color standard.
• - Further transport of the substrate to the processing station, eg Rillstation or punching station
• - register alignment of the processing station to the printed processing contour, in particular by the machine operator.

• – Ermittlung der Positionsdaten der Stanzkontur eines Bildes aus Vorstufendaten oder Berechnung aus Bilddaten
• – Drucken der Stanzkontur eines Bildes mit einer Digitaldruckstation auf den Bedruckstoff
• – Weitertransport des Bedruckstoffs zu einer „analoger“, d.h. nicht digitalen Stanzstation
• – Passergenaue Ausrichtung der Stanzstation relativ zur gedruckten Stanzkontur

The setup procedure is explained in more detail using the example of a stamping station:

• - Determination of the position data of the punching contour of an image from precursor data or calculation from image data
• - Printing the punched contour of an image with a digital printing station on the substrate
• - Further transport of the substrate to an "analog", ie not digital punching station
• - Paßgenaue alignment of the punching station relative to the printed punching contour

The method is particularly suitable for printed on digital web printing machines labels and cartons.

In the case of the application of the method with a punching station, the following advantages result:
In order to save ink / toner in a digital press, only the punching contour is printed for the setup process of a subsequent punch, eg rotary punch, and not the whole picture. If the edge of the printed image and the punching contour do not match, the printed punching contour can nevertheless be aligned exactly.

The invention described and the described advantageous developments of the invention are also in combination with each other - as far as is technically feasible - advantageous developments of the invention.

With regard to further advantages and constructive and functional advantageous embodiments of the invention, reference is made to the dependent claims and the description of exemplary embodiments with reference to the accompanying figures.

embodiment

The invention will be explained in more detail with reference to accompanying figures. Corresponding elements and components are provided in the figures with the same reference numerals. In favor of a better clarity of the figures was waived a true to scale representation. In a schematic representation:

1 a punching contour of a folding box auszustanzenden

2 a printing press in an overview.

When setting up a digital press 100 (Toner, liquid toner, inkjet, ...) in combination with an integrated analogue punch 12 (rotative, semirotativ, ...) must the punch 12 on the digitally printed image, eg label or folding box 5 to be aligned. This happens in the prior art partly already with print mark sensors. However, the picture must always be printed completely. The invention aims that of the image only the punching contour 5 is printed digitally, which consumables (toner, ink, ...) can be saved. On the basis of this punching contour can then the register-accurate device of the punching station 12 respectively.

1 shows one on a substrate web 1 printed punching contour 5 an auszustanzenden carton 2 , Folded edges are shown in dashed lines.

2 shows as an example of a processing machine 100 a printing machine for printing a substrate web 1 , The substrate web 1 is thereby transported in the transport direction T through a plurality of processing units and processed. The processing plants are conventional printing units 11 , Digital printing 14 , a stamping mill 12 and a punching and Rillwerk 13 , Adjacent to the web run of the substrate web 1 can be one (or more) inspection system 4 be provided, which is designed for example as a camera to continuously the substrate web 1 to monitor. The machine is controlled 100 and the printing works 11 . 14 from a machine control 3 , Instead of the conventional embossing mill 12 may also be a device for hot foil stamping 10 to be used.

When a new job is set up with a new die or into a machine 100 is loaded (from the preliminary stage, eg via a network connection, from a USB stick, from a local database or the like), at the start of printing to set up the punching station 12 the machine 100 automatically initially only the punching contour 5 in a color pre-set by the operator, available in the machine (eg Black) (alternatively: as default color, "Black" is the default setting, as usually always available in the machine). If this preset color is not available, another available color may be used. This one color does not necessarily have to be later in the label or carton 5 Find use. The punching contour 5 can be supplied from the prepress or from the digital image processing system 3 in the machine 100 calculated / determined from the existing order. Even variable data shares, at least their position / position frame can be taken into account. After setting up and correcting the die 5 on the contour or correction of the contour on the cutting die 5 , the completion of setting up can be detected automatically (eg by a camera system) and switched to the "correct" print image. Alternatively, this can also be done by the operator through operator intervention (confirmation button on keypad, touch or hardware button). In the event of problems in the later production process, you can also switch back to the punching contour with a corresponding key

LIST OF REFERENCE NUMBERS

1

Substrate web (substrate)

2

folding

3

Control unit (machine control with interface)

4

inspection system

5

Printed stamping contour

11

printing unit

12

stamping

13

Punching and Rillwerk

14

Digital printing

15

pressure cylinder

16

Impression cylinder

17

embossing cylinders

18

punching cylinder

100

 press

T

Railway transport direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2080600 A1 [0002, 0003]
• EP 1731277 B1 [0004]
• DE 102010026607 A1 [0005]
• EP 1772405 B1 [0009]
• DE 4442411 B4 [0010]

Claims (7)

Method for setting up a processing station ( 12 ) of a printing machine ( 100 ) with a preceding digital printing station ( 14 ) with the following steps: determination of the position data of the machining contour ( 5 ) of a print object from precursor or calculation from image data - printing at least a part of the machining contour ( 5 ) of an image with digital printing station ( 14 ) on a substrate ( 1 ) - Further transport of the printing material ( 1 ) to the processing station ( 12 ) - registration of the processing station ( 12 ) to the printed processing contour ( 5 ), especially by the machine operator. Method according to claim 1, characterized in that the processing station ( 12 ) is equipped as a similar processing station with sectioned tool. Method according to claim 1, characterized in that the calculation of the machining contour ( 5 ) takes place by a superimposition of all individual images and image processing of the overlay. A method according to claim 1, characterized in that it is in the printing machine ( 100 ) is a web printing machine, in particular a narrow web label printing machine or a folding carton printing machine. A method according to claim 1, characterized in that the method is used in particular for rotary blanking, flat bed stamping, creasing, embossing, painting or printing with analog printing methods. A method according to claim 1, characterized in that the alignment is automated, in particular using cameras. A method according to claim 1, characterized in that for the printing of the punching contour ( 5 ) the color is widely available or not used for the print job.

Images