EP2532520B1 - Method for creating a fold preparation pattern, computer for performing the method and system with such a computer - Google Patents

Description

The invention relates to a method for producing a seam preparation pattern according to claim 1, a computer for carrying out the method according to claim 8 and a system consisting of a computer and a folding machine according to claim 9.

State of the art

The EP 1 475 334 A1 shows a folding machine with a pair of knife shafts. The knife shafts are mounted parallel to each other between two spaced side walls of the folding machine. In order to be able to cut, perforate, crimp, groove, groovel or press folded paper sheets perpendicular to a folding line, ie in the sheet running direction, pairs of knife shafts are arranged upstream or downstream of the folding rollers of a folding unit. In the following, the terms grooves and grooves are used synonymously. What is meant is a material weakening of the sheet material by removing material, thereby reducing the cross-section.

The knife shafts are usually knife shaft pairs, in which one blade shaft is equipped with tools and the other blade shaft with counter tools. The tools are mounted on tool holders, which are pushed onto the knife shafts.

Such preparation of sheets to be folded is required to cause material weakening at the desired positions of the fold breaks and thus to ensure that the fold breaks are actually made at the intended position. Otherwise, the position of the fold breaks may differ, especially with thicker products, resulting in lower quality folded products.

A disadvantage of the use of knife shafts is on the one hand their complex adjustment to the correct position. When changing orders, it may be necessary to change the Remove knife shafts from the folding machines in order to be able to push additional knife holders onto the knife shafts.

Another disadvantage is that no folding preparation for the folding seams to be executed in this pocket folding station can be carried out by knife pockets upstream of a pocket folding station. This is due to the fact that cutting, perforation or creasing lines can be produced by the blades of the knife shafts only in the transport direction, while the folding breaks are aligned perpendicular to the transport direction. Thus, it is only possible by the known knife shafts to make a seam preparation for executed in a second Taschenfalzstation fold breaks when the second Taschenfalzstation is arranged at an angle of 90 ° to the first Taschenfalzstation.

From the DE 44 42 411 B4 It is known that sheets are processed during transport by a printing press, in particular directly in front of the boom, by a laser unit, namely cut, perforated or grooved. In this case, known lasers for paper processing in the infrared (IR) range, see DE 10 2008 030 457 A1 ,

From the DE 198 58 330 A1 is a device for cutting a web in single sheet out. The cutting device, which may be embodied as a laser light source, is arranged on a carriage, which is moved on a curve both in the transport direction and transversely thereto. The speed component in the transport direction corresponds to the transport speed of the printing material, so that a cut is produced at right angles to the web edges.

In the DE 327 613 PS is described that can be punched or cut in advance at the intersection of Falzbrüchen small cutouts in sheet to be folded, which increases the quality of Falzbrüche.

task

The object of the present invention is to describe a method for producing a seam preparation pattern, wherein the requirements on the machine operator of a folding machine are substantially reduced and the disadvantages of the prior art are at least reduced. Another object is to provide a computer on which the method for producing a seam preparation pattern can be executed. Another object is to provide a system of a computer and a folding machine, which allows a simplified adjustment of the seam preparation pattern for changes to the folding machine.

These objects are achieved by a method for producing a seam preparation pattern having the features of claim 1, by a computer for carrying out the method having the features of claim 8 and by a system comprising a computer and a folding machine having the features of claim 9.

The inventive method for generating a job-specific seam preparation pattern for a signatures used to create a pattern, which assigns a folded sheet positionally accurate cutting, trimming and / or cutout pattern. (A pattern means an incision in the sheet, a trimming pattern means a portion through which a part of the sheet is removed). In this case, job-specific folding sheet characteristics are fed to a computer and job-specific cutting requirements are determined. In the calculator, general cut-sheet requirements are associated with general fold-sheet characteristics. When the job-specific cutting requirements are determined, the computer accesses a database in which cutting, trimming and cutting patterns are stored. In accordance with the order-specific cutting requirements, the computer selects cutting, trimming and cut-out patterns, assigns them to a specific position on the folded sheet and thus compiles order-specific seam preparation patterns.

It is particularly advantageous if the cutting patterns and / or trim patterns comprise cutting lines, score lines and perforation lines.

It is particularly advantageous if the cutout patterns comprise circles and / or ovals and / or mehrows and / or crosses.

In an advantageous development of the method, a perforation line consists of a multiplicity of perforation points, and the position of the perforation points on the perforation line is distributed unevenly by means of an algorithm.

In a particularly advantageous and therefore preferred embodiment of the method according to the invention, the job-specific folding sheet characteristics comprise the sheet material, the starting format, the target format (after section of the offset of the printing sheet), the division, the grammage, the thickness and / or the folding pattern (ie the folding scheme inclusive the position of the fold lines) of the signature.

In an advantageous development of the method, the seam preparation pattern can be changed by input into an interface connected to the computer. As a result, corrections can be made to the seam preparation pattern by the machine operator and the experience of the machine operator can be incorporated into the preparation of the seam preparation patterns.

It is furthermore advantageous if the seam preparation pattern is fed to a seam preparation device which converts the seam preparation pattern by cutting, grooves, perforation and / or cutting on a respective folded sheet for the preparation of the folded sheet. This seam preparation device may, for example, have a laser aggregate for processing the sheet.

It is also advantageous if the seam preparation pattern for repeat jobs is stored in a data memory.

The invention also provides a computer for carrying out the above-described method for producing a seam preparation pattern. This computer can be integrated into a seam preparation device or a processing machine. Alternatively, the computer can also be a solitary installation which exclusively serves to produce the seam preparation pattern. A software that runs on a solitary computer and in which the method described above is integrable, is offered, for example, under the name "Compufold" by the patent applicant.

The invention also relates to a system comprising a computer and a folding machine as described above, wherein the folding machine has a control unit, positionable guide elements and / or stops for sheet guiding (eg alignment ruler, pocket stops) and wherein the computer and the control unit are connected to one another by data technology or are executed integrated. Changes in position of the vanes and / or the stops are communicated to the computer by the control unit of the folding machine and are used to adjust the seam preparation pattern, i. the position of the cutting, trimming and cutting patterns is adjusted as a function of the change in position of the guide elements and / or the stops of the folding machine.

The described invention and the described advantageous developments of the invention are also in any combination with each other advantageous developments of the invention.

With regard to further advantages and advantageous embodiments of the invention, reference is made to the dependent claims and the description of an embodiment with reference to the accompanying drawings.

embodiment

Fig. 1

einen Rechner zur Ausführung des erfindungsgemäßen Verfahrens

Fig. 2a und b

ein Falzvorbereitungsmuster und einen Falzbogen

Figuren 3a bis 3g

verschiedene Varianten von Falzvorbereitungsmustern

Fig. 4

ein System aus Falzmaschine, Falzvorbereitungseinrichtung und Rechner

The invention will be explained in more detail with reference to an embodiment. It show in a schematic representation

Fig. 1

a computer for carrying out the method according to the invention

Fig. 2a and b

a seam preparation pattern and a signature

FIGS. 3a to 3g

different variants of seam preparation patterns

Fig. 4

a system of folding machine, seam preparation device and computer

Fig. 1 1 shows a computer for generating a Falzvorbereitungsmusters 10. The computer 1 order-specific Falzbogencharakteristika are supplied to f ₁ to f _n. These can either be input via an interface 4 or supplied to the computer 1 via a data line. The order-specific fold-sheet characteristics f ₁ to f _n can be provided by an order management system, as offered for example by the patent applicant under the name "Prinect Postpress Manager". In the computer 1, general folding requirements S ₁ to S _{m are} assigned to general folding-sheet characteristics C ₁ to C _n . Taking this assignment rule into account, the computer then determines order-specific cutting requirements e ₁ to e _{m based} on the order-specific signature sheet f ₁ to f _n . In a database 2 of the computer 1 cutting, trimming and cutting patterns are stored. The patterns and trimming patterns include trimming lines, score lines, and perforation lines of various lengths and widths. For the creasing lines different material weakening degrees are stored. The cutout patterns include circles, ovals, multiples, and crosses. For each pattern is stored in the database, which meets cutting requirements of each pattern. From the computer 1, two patterns are selected in the next step corresponding to the order-specific cutting requirements e ₁ to e _m from the database, which fulfill the requirements, and thus compiled into a seam preparation pattern 10. This seam preparation pattern 10 can be displayed to the machine operator via display devices 4. Via input devices 4, the machine operator can still change the proposed seam preparation pattern 10. In a memory 3, the generated and possibly changed Falzvorbereitungsmuster 10 can be stored. The seam preparation pattern 10 may also be forwarded to a seam preparation apparatus 1000 which implements the seam preparation pattern by inserting cuts, cuts, perforations, cutouts, and creases into a respective signature sheet in preparation for a subsequent seaming process.

In Fig. 2b For example, a folded sheet 100 is shown. In Fig. 2a For this sheet 100, an exemplary seam preparation pattern 10 is shown, which was created with the computer 1 described above. In this example, the seam preparation pattern 10 comprises a trimming line 12 and a perforation line 11 and two holes as cutouts 13. The trimming line 12 lies at a position at which a severing cut is later to be carried out by a seam preparation device 1000. In this case, the perforation line 11 lies at a position at which a perforation is later to be carried out by the seam preparation device 1000 in order to enable a positionally accurate folding. At the points of intersection of the further fold lines 14, cutouts 13 are provided by the seam preparation pattern 10, at the position of which the seam preparation device 1000 is to make holes or punched holes later.

In the FIGS. 3a to 3g Further examples of fold preparation patterns 10 are shown, which are assigned to a sheet 100. All have in common that they have a plurality of patterns 11, these patterns 11 represent short gates. These short gates 11 lie in each case at the edge of the folding sheet 100, at the position of still to be executed fold lines. Through these gates, the quality of the fold breaks can be significantly increased, since in the execution of a respective fold fracture, the sheet material can be compressed easier. In the FIGS. 3a, 3b, 3c . 3d, 3e, 3g additionally cutout pattern 13 are provided, which are positioned at the intersection of fold lines. While the cutout patterns according to Fig. 3a have the shape of a cross are according to Fig. 3b Circles, according to Fig. 3c Squares, according to Fig. 3d Diamonds, and according to Fig. 3e Diamonds and rectangles provided. In the seam preparation pattern 10 according to FIG Fig. 3e Thus, various cutout patterns 13 were combined with each other. According to Fig. 3f and 3g are provided at the position of fold lines pattern 11. These patterns 11 can be executed either as creasing lines or as perforation lines. According to Fig. 3g sees the seam preparation pattern 10 in addition to the patterns 11 at the intersection of the fold lines 14 cutting pattern 13 before.

Fig. 4 1 shows a system comprising a folding machine 2000, a folding preparation device 1000, eg a cutting device with laser unit, and a computer 1 as described above. The computer 1 provides a seam preparation pattern 10, which is transmitted to the seam preparation device 1000 via data lines. The seam preparation device 1000 can be integrated into the folding machine 2000, as shown, or can also be designed as a separate module. The folding machine 2000 has a machine control unit 2001, which is likewise connected to the computer 1 via data line. If guide elements or stops 2002 of the folding machine 2000 are adjusted starting from their initial desired positions to further improve the folding accuracy, then the controller 2001 reports the change in position to the computer 1, which automatically performs an adaptation of the seam preparation pattern 10. Alternatively, the machine operator can be queried whether an adjustment should be made. The adapted pattern 10 is then transmitted to the seam preparation apparatus 1000.

LIST OF REFERENCE NUMBERS

1

computer

2

Database

3

Storage

4

interface

5

"Random" generator

10

Falzvorbereitungsmuster

11

patterns

12

Beschnittmuster

13

cutout pattern

14

fold line

100

signatures

1000

Falzvorbereitungsvorrichtung

2000

folding machine

2001

control unit

2002

Vane / stop

C ₁ ... C _n

general fold-sheet characteristics

e ₁ ... e _m

Order-specific cutting requirements

f ₁ ... f _n

job-specific fold-sheet characteristics

S ₁ ... S _m

general cutting requirements

Claims (9)

1. Method for creating a fold preparation pattern (10) that assigns cutting (11), trimming (12) and/or clipping patterns (13) to a signature (100) in accurate positions,
   characterized in
   that job-specific signature characteristics (f₁... f_n) are supplied to a computer (1), and that job-specific cutting requirements (e₁...e_m) are determined by means of general cutting requirements (S₁...S_m) that are assigned to respective general signature characteristics (C₁...C_n) in the computer (1) and using the job-specific signature characteristics (f₁ ... f_n),
   and that the computer (1) accesses a database (2) containing cutting, trimming and clipping patterns (11, 12, 13) and combines the cutting, trimming and clipping patterns (11, 12, 13) as a fold preparation pattern (10) in accordance with the job-specific cutting requirements (e₁...e_m) .
2. Method for creating a fold preparation pattern according to claim 1,
   characterized in
   that the cutting patterns (11) and/or trimming patterns (12) comprise cutting lines, crease lines, and perforation lines.
3. Method for creating a fold preparation pattern according to claim 2,
   characterized in
   that a perforation line consists of a plurality of perforation points the position of which on the perforation line is unevenly distributed using an algorithm (5).
4. Method for creating a fold preparation pattern according to any one of the preceding claims,
   characterized in
   that the clipping patterns (13) comprise circles, ovals, polygons, and/or crosses.
5. Method for creating a fold preparation pattern according to any of the preceding claims,
   characterized in
   that the job-specific signature characteristics (f₁... f_n) include the type of stock, the format, the target format, the partition, the grammage, the thickness and/or the fold pattern of the signature (100).
6. Method for creating a fold preparation pattern according to any one of the preceding claims,
   characterized in
   that the fold preparation pattern (10) is modifiable by inputs into an interface (4) connected to the computer (1)
7. Method for creating a fold preparation pattern according to any one of the preceding claims,
   characterized in
   that the fold preparation pattern (10) is supplied to a fold preparation device (1000) and/or stored for repeat orders.
8. Computer (1) for implementing the method for creating a fold preparation pattern (10) according to any one of the preceding claims.
9. A system consisting of a computer (1) according to claim 8 and a folding machine (2000) with a control unit (2001), wherein the folding machine (2000) has positionable guide elements and stops (2002) for guiding sheets, wherein the computer (1) and the control unit (2001) are connected by a data link, and wherein the control unit (2001) communicates position changes of the guide elements and stops (2002) to the computer (1) in order to adapt the fold preparation pattern (10).

Images