Method for operating a platform-type punching machine

Abstract

To provide a method of operating a flatbed die cutting machine that can manufacture a product by web die cutting and reduce printing failure and down time.SOLUTION: In this method, a material to be printed (2) is supplied as web (2) to a die cutting module (7) of a flatbed die cutting machine (1), and a web segment (2b) is separated from the web and removed as printing failure (2c). The web (2) is caused to pass through the die cutting module (7), and the web segment (2b) is separated from the web inside the die cutting module or in the downstream of the die cutting module and removed as printing failure (2c).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method having the features of the superordinate concept of claim 1.

[0002] Technical Field of the Invention The present invention belongs to the technical field of the graphic industry, and in particular, to the field of further processing of sheet-like or web-like printed materials, such as paper, cardboard, thick paper, or film, by a die-cutting machine, in particular a flatbed die-cutting machine, which is carried out inline or offline following printing.

[0003] Background Art It is known to print a web which is a printed material with a printing machine and further process it in a flatbed die-cutting machine inline or offline. In this case, when the order is changed, the printing machine is stopped and then restarted again, and there is a problem that an unwanted undulation or other deformation or damage of the web occurs, that is, so-called curling of the web occurs, for example, like a wavy web edge. Curling may occur, for example, due to changes in air humidity and / or ambient temperature. Curling may cause problems during the processing of the printed material. Further, at the time of restart, there may be a registration deviation, that is, there may be a loss of alignment between the printed image and the die-cut image.

[0004] Furthermore, it is known that unusable (for example, "curled") sections of the web are removed, for example, wound up, as printing waste before further processing, that is, before die-cutting or upstream of the flatbed die-cutting machine. In this case, there is a problem that the web conveyance has to be stopped again after starting in order to introduce the web start end into the die-cutting machine and adjust the register. Only then can production be started. Therefore, overall, a large amount of production stop time occurs and a large amount of printing waste occurs.

[0005] In the flat-bed punching machine disclosed in German Patent Application Publication No. 102012019992, the unusable unprinted web section (located upstream of the printed web section) is wound up upstream of the flat-bed punching machine and removed by cutting. For this purpose, the web is fed out before cutting, sent in the reverse direction, and then sent forward again while maintaining the web tension after cutting. The newly created web starting end must be introduced into the flat-bed punching machine. Furthermore, the register must be adjusted.

[0006] Problem Therefore, the problem of the present invention is to provide an improvement over the prior art that enables the production of products by punching the web, and in this case, can reduce printing waste and downtime. In particular, at the start of production ("new order"), it is desirable to be able to quickly start up the flat-bed punching machine, and in particular, it is desirable to avoid the situation where the flat-bed punching machine has to be stopped again during start-up due to so-called curling.

[0007] Solution according to the present invention According to the present invention, this problem is solved by the method according to claim 1.

[0008] Another preferred and thus advantageous aspect of the present invention is described in the dependent claims as well as in the detailed description and the drawings.

[0009] A method according to the present invention for operating a flat-bed punching machine, which supplies a printed object as a web to the punching module of the flat-bed punching machine, separates a web section from this web, and removes it as printing waste, is characterized in that the web is passed through the punching module, and the web section is separated from the web within the punching module or downstream of the punching module and removed as printing waste.

[0010] Preferably according to the present invention, products can be manufactured by punching the web, and in this case, printing waste and downtime can be reduced.

[0011] According to the present invention, preferably, a flat-bed punching machine can also be quickly started up at the start of production (a "new order").

[0012] According to the present invention, preferably, during color matching or so-called proofing, for example, the need for the flat-bed punching machine to be stopped again at startup due to so-called curling is also avoided.

[0013] More preferably, the so-called phase adjustment of the flat-bed punching machine can be operated automatically and with approximate positioning: the web (flowing again after a production change) can be separated, the unusable section of the web can be removed from the flowing web as waste (for example, as a web section or as a sheet), and the flowing web can be processed, preferably punched, with correct approximate positioning. In such a preferred manner, the downtime of the machine can be reduced, and the amount of waste can be significantly reduced.

[0014] Another aspect of the invention Another preferred embodiment of the present invention is characterized in that the web section is cut by one cutting knife of the die-cutting tool or one cutting knife of the die-cutting module, or the web section is only partially cut by one cutting knife of the die-cutting tool or one cutting knife of the die-cutting module and then torn, or the web section is cut by two cutting knives of the die-cutting module, or the web section is only partially cut by two cutting knives of the die-cutting module and then torn. The cutting knife may be formed as a web separating knife or a web perforating knife. The cutting knife may be arranged transversely to the web flow direction and at a corresponding different position in the web flow direction according to the size of the sheet to be processed. In the case of two cutting knives, one may be arranged at the start end of the sheet (in front of the effective part of the sheet, for example, at an interval of 1 to 2 mm from the front effective part), and the other may be arranged at the end end of the sheet (behind the effective part of the sheet). The cutting knife may be formed as one edge knife (or two edge knives, one on each side of the web), and the edge knife does not separate the entire web, but only separates the lateral edge region of the outer effective part.

[0015] Another preferred embodiment of the present invention is characterized in that the web section is cut by a rotating or vertically moving transverse cutting machine different from one cutting knife of the die-cutting module, or the web section is only partially cut by a rotating or vertically moving transverse cutting machine different from one cutting knife of the die-cutting module and then torn. The transverse cutting machine can be used to separate, in particular, the edges of the web.

[0016] Another preferred embodiment of the present invention is characterized in that the separated web section is moved, preferably pulled, from the die-cutting module to the outside by a pair of rollers. Preferably, at least one of the pair of rollers is driven, in particular intermittently and / or synchronously with the die-cutting cycle.

[0017] Another preferred aspect of the present invention may be characterized in that the transverse cutter is arranged upstream or downstream of the pair of rollers.

[0018] Another preferred aspect of the present invention may be characterized in that the rubbing loss is removed as a web and wound around a winding roller.

[0019] Another preferred aspect of the present invention may be characterized in that, particularly using a guide plate, the rubbing loss is removed as a sheet and discharged or shredded.

[0020] Another preferred aspect of the present invention may be characterized in that the sheet is discharged from the transport path by a diverter.

[0021] Another preferred aspect of the present invention may be characterized by performing phase adjustment of the die-cutting module, that is, accurately aligning the die-cutting module with the printed image of the printed display on the web during or after removal of the web section, and operating and / or actuating at an accurate speed.

[0022] Another preferred aspect of the present invention may be characterized in that the supply of the web to the flatbed die cutter and the passage of the web through the die-cutting module are started at the start of production, then continued without stopping during the removal of the web section and during accurately aligned die-cutting, and stopped only at the end of production.

[0023] The following (points 1 to 15) will detail a preferred specific first alternative aspect of the method according to the present invention for operating a flatbed die cutter while using a winding roller.

[0024] 1. If the die cutter has not yet been operated, it can move to a standby position. In the standby position, the gap between the upper die plate and the lower die plate above the die-cutting module may be maximum.

[0025] 2. The desired die-cut format and, optionally, the ratio of the die-cut effective part to the printed effective part can be set, for example, by input by an operator or by reading from a digital memory, such as a cloud-based memory. Alternatively, the ratio of the die-cut effective part to the printed effective part can be automatically detected by a register sensor or a register camera or a code reader. Alternatively, a barcode or a planar code, such as a QR code or a data matrix, can be provided on the web from which values can be read. Further alternatively, the values of a printing press spatially and / or production-wise upstream of the flatbed die-cutting machine can be automatically provided.

[0026] 3. If not already done, the material web may be introduced into the introduction area of the die-cutting module, for example, into a roller device upstream of the die-cutting module, in which case it may be brought into contact with the draw rollers and the feed rollers (or a plurality of such rollers) and, optionally, the corresponding rollers.

[0027] 4. (Alternatively to the above 3) There may also be cases where the material web is already in the introduction area and only the web section where curling has occurred should be removed.

[0028] 5. The material web can be passed through the die-cutting module and fixed to the take-up roller.

[0029] 6. It is possible to activate the introduction or pulling-in of the web (start of the "pulling-in" mode). In this case, the value of the distance or interval between the die-cut registration mark (on the object to be printed) and the separating knife of the die-cutting module can be set, for example, by input by an operator or by reading from a digital memory, such as a cloud-based memory. Alternatively, this interval can be automatically detected by a register sensor or a register camera or a code reader. Alternatively, a barcode or a flat code, such as a QR code or a Data Matrix, can be provided on the web, from which the value can be read. Further alternatively, the values of a printing press spatially and / or production-wise upstream of the flatbed die-cutting machine can be automatically provided.

[0030] 7. By starting the "pulling-in" mode, the take-up roller can be started or rotated to form the pulling of the web / the tension of the web. The (web) stock roller can be brought to an optimal position and stopped there or held in this position. The feed roller can shift from intermittent operation to continuous operation. The kicker roller that conveys the web from the die-cutting area during die-cutting can move to an optimal position ("open") and stay there. When the take-up roller is arranged below the web conveyance device, the lower roller of the two kicker rollers can rotate continuously at the web speed, and the upper roller of the two kicker rollers may be in the "open" position.

[0031] 8. The die-cutting machine (and optionally a printing press arranged upstream or optionally an offline pay-off machine preferably equipped with a pulling station and tools) can be started to continuously move the web. In this case, the paper feed roller conveys the web into the die-cutting machine, and the take-up roller can pass the web through the die-cutting machine and convey the web out again to the outside. The movable deflector roller / guide roller can preferably move within a web flow of about 20 mm.

[0032] 9. The position of the registration mark can be observed or monitored. The registration mark may be pre-printed on the web or printed by a printing press. A suitable or optimal phase adjustment time point can be calculated or set. This phase adjustment time point is the time when the die-cutting module of the flatbed die cutter is activated and die-cutting starts with correct alignment and at the correct speed. If the die-cutting register is aligned with the printing register, die-cutting is performed with correct alignment.

[0033] 10. The phase adjustment for the die-cutting operation with alignment can be manually activated by the operator. Alternatively, it may be activated preferably depending on a predefined and / or set and / or calculated distance, for example, the distance of the material web from the feeder (or the web supply to other die cutters) to the die cutter. Further alternatively, it may be activated via a continuously operating sensor device for curl detection, in which case, preferably, activation is performed when the curl falls below a preferably defined threshold value.

[0034] 11. At the start of phase adjustment, the web can be moved, preferably to a suitable register position that has been calculated or set, up to a suitable register position. The feed roller actuated for this purpose can then be stopped. If the distance to the suitable register position has already been exceeded, a corresponding portion of the length of the sheet or web section to be die-cut can be moved into the die-cutting module and can be moved to the suitable register position. The feed roller is then stopped, and the cutting plate of the flatbed die-cutting machine can be moved in the direction of the web, preferably upwards. The tension in the web at the take-up roller and / or the web tension is preferably maintained in this case. Then, the cutting of the object to be die-cut by the die of the cutting plate can be started. By pulling the web by the take-up roller, which can generate a relatively high web tension at the time of cutting, the web can be torn at the cutting point. To avoid lattice tearing, a knife can optionally be placed into the die on the side of the web at the cutting point of the first object to be die-cut. This can ensure a controlled cut at the desired position. Alternatively, the web can be cut at the desired location, for example, about 2 mm behind the maximum penetration position, by an additional separating knife.

[0035] 12. At the same time, the web can be continuously conveyed by the gripper roller. The movable stock roller can store the conveyed web, i.e., preferably a web section of a predetermined length. The movement of the stock roller may be performed by a cam disk.

[0036] 13. When the cutting plate is again separated from the web, preferably downwards, the take-up roller can be operated with a slight pull on the web, and the feed roller can convey the web back into the die-cutting machine again. The die-cut sheet can be sent out of the die-cutting module by one or more kicker rollers. For this purpose, the lower kicker roller may be changed back to the "kick" (sheet conveyance) mode again. At the same time, the movable deflector roller / guide roller can again be separated from the web, preferably by about 20 mm.

[0037] 14. The take-up roller can preferably be automatically turned off after a set short time.

[0038] 15. Now, the flat-bed die cutter operates in normal operation and can produce the die-cut object. The "drawing-in" mode ends.

[0039] The following (points 1 to 15) will detail a preferred specific second alternative aspect of the method according to the present invention for operating the flat-bed die cutter while using the scuffing discharge section. In this case, some points remain unchanged compared to the above specific first alternative aspect.

[0040] 1. No change. 2. No change. 3. No change. 4. No change.

[0041] 5. The introduction or drawing-in of the web can be actuated (start of the "drawing-in" mode). In this case, the scuffing direction switch can be actuated, i.e., the scuffing direction switch can be brought to the mode and / or position that guides the scuffing to the scuffing discharge section. The material web can move through the die-cutting module and can be moved, for example, pushed or drawn in, into the scuffing direction switch to a certain extent, for example, about 0.5 meters. The web may contact rollers in the scuffing discharge section, for example, a pulling roller and a corresponding roller.

[0042] 6. No change.

[0043] 7. By starting the "drawing-in" mode, the cross-cutting machine of the printing waste discharge section can be operated and synchronized with the web feed. The (web) stock roller can be brought to and stopped at, or held in, an optimal position. The feed roller can shift from intermittent operation to continuous operation. The kicker roller can move to an optimal position ("open") and can optionally stop there.

[0044] 8. The die cutter (and optionally the printing machine arranged upstream) can be started and the web can be continuously moved. In this case, the paper feed roller and optionally the feed roller can convey the web into the die cutter up to the printing waste direction changer. Preferably, immediately after the direction changer, the cross-cutting machine can separate the web, and the separated section can be discharged preferably via a guide plate. Optionally, the sheet can be moved into the shredder.

[0045] 9. No change. 10. No change.

[0046] 11. At the start of phase adjustment, the web can be moved to a suitable register position, preferably calculated or set. The feed roller operated for this purpose can then be stopped. If the distance to the suitable register position has already been exceeded, a corresponding portion of the length of the sheet or web section to be die-cut can be moved into the die-cutting module and moved to the suitable register position. Then the feed roller is stopped and the die-cutting plate of the flatbed die cutter can be moved in the direction of the web, preferably upwards.

[0047] 12. The die-cutting die of the die-cutting machine cuts the object to be die-cut. One or more kicker rollers can convey the remaining web out of the die-cutting machine. When the cut web passes through the direction changer, the wear direction changer is stopped, i.e., returned to the mode or position for production. At the same time, the web can be continuously conveyed by the pulling roller. The movable stock roller can store the conveyed web, i.e., preferably a web section of a predetermined length. The movement of the stock roller may be performed by a cam disk.

[0048] 13. When the die-cutting machine is again separated from the web, preferably downward, the feed roller can convey the web back to the die-cutting machine and can convey or slide the sheet out of the die-cutting module. The die-cut sheet can be sent out of the die-cutting module by one or more kicker rollers.

[0049] 14. The die-cut sheet may be placed on a sheet conveyor, for example, on one or more belts. In this case, the wear direction changer continues to be in the mode or position for production.

[0050] 15. Now, the flatbed die-cutting machine operates in normal operation and can produce the object to be die-cut. The movement of the horizontal cutting machine and, in some cases, the material conveyance to the wear discharge section or shredder are terminated. The first sheet can be moved to the subsequent breaking unit via the sheet conveyor. The "drawing-in" mode is terminated.

[0051] In the following (points 1 to 15), a preferred specific third alternative aspect of the method according to the invention for operating a flatbed die-cutting machine using a wear discharge section will be described in detail. In this case, some points remain unchanged compared to the above specific second alternative aspect.

[0052] 1. No change. 2. No change. 3. No change. 4. No change. 5. No change. 6. No change.

[0053] 7. By starting the "drawing-in" mode, the cross-cutting machine of the waste discharge section can be operated and synchronized with the web feed. The (web) stock roller can be brought to and stopped at, or held in, an optimal position. The feed roller can shift from intermittent operation to continuous operation. The kicker roller can be moved, particularly rotated, to convey the separated sheet to the waste direction switch.

[0054] 8. The die cutter (and optionally the printing press arranged upstream) can be started and the web can be continuously moved. In this case, the paper pull-in roller and optionally the feed roller can continuously convey the web into the die cutter. The cross-cutting machine can separate the web, and the kicker roller can convey the separated section to the waste direction switch. From here, the sheet can be conveyed and discharged, preferably via a guide plate. Optionally, the sheet can be moved into a shredder.

[0055] 9. No change. 10. No change. 11. No change.

[0056] 12. The die of the die cutter cuts the object to be die-cut. One or more kicker rollers can convey the last sheet out of the die cutter. When the last sheet passes through the direction switch, the waste direction switch is stopped, i.e., returned to the production mode or position. The cross-cutting machine can be turned off. At the same time, the web can be continuously conveyed by the paper pull-in roller. The movable stock roller can store the conveyed web, i.e., preferably a web section of a predetermined length. The movement of the stock roller may be performed by a cam disk.

[0057] 13. No change. 14. No change.

[0058] 15. Now, the platformless punching machine operates in normal operation and can produce the object to be punched. The conveyance of the worn-out discharge part or the material to the shredder is completed. The first sheet can be moved to the subsequent breaking unit via the sheet conveyor. The "drawing-in" mode ends.

[0059] It is not necessary to implement all the details of the above-described other aspects; only the individual details or arbitrarily selected details of each other aspect may be implemented. For the implementation of each method, additionally, a device for control, in particular, for example, a digital computer may be provided for storing and processing the individual or all data described later.

[0060] The features of the present invention, other aspects of the present invention, and embodiments of the present invention may be arbitrarily combined with each other to form another preferred aspect of the present invention. Another aspect of the present invention may further have individual features or combinations of features disclosed in the above "Technical Field of the Invention" section.

[0061] Embodiments of the Invention The present invention and its preferred other aspects will be described in detail below with reference to the drawings for preferred embodiments. The same reference numerals are given to corresponding features in the drawings.

Brief Description of the Drawings

[0062]

Figure 1

Figure 2

Figure 3

[0063] The drawings each show a machine 1 in the practice of various preferred embodiments of the method according to the invention. In the following, in particular, the die-cutting process will be described; alternatively, embossing can also be carried out, or die-cutting and embossing can be carried out simultaneously.

[0064] The drawings each show one machine 1, in particular a flatbed die-cutting machine 1, or a machine comprising in particular a flatbed die-cutting machine 1. The die-cutting machine is preferably supplied with a printed material 2 as a web 2, in particular a printed material made of paper, cardboard, paperboard or film, preferably as a paperboard web. The web can be unwound from a stock roll (not shown). The stock roll may be housed in a roll unwinder (not shown).

[0065] The web is preferably printed on at least one side or has at least one printing registration mark. Printing can be carried out on the same machine, i.e. this machine may comprise at least one printing mechanism arranged in front of the die-cutting machine. This machine may be a printing press equipped with an integrated or in-line connected flatbed die-cutting machine. The printing mechanism may be an offset printing mechanism, a gravure printing mechanism, a letterpress printing mechanism or a flexographic printing mechanism, or a digital printing mechanism, in particular an inkjet printing mechanism. A plurality of the same or different printing mechanisms may be provided in front. Printing may alternatively be carried out by another machine, for example a separate printing press.

[0066] The web supply is preferably carried out via a plurality of rollers 3, preferably along a preferably serpentine conveying path 4. At least roller 3a and / or 20 may be a paper pulling roller, i.e. may be motor-driven. At least roller 3b can cooperate with a corresponding roller or an abutting roller. The corresponding roller or the abutting roller may be segmented. At least roller 3c may be a stock roller, i.e. may be movably arranged and may be motor-driven. At least roller 3a and / or 20 may be a steel roller.

[0067] The conveyance path may include a so-called curl sensor 5 and / or a register sensor 6. The curl sensor functions to detect an undesirable undulation or other deformation or damage of the web, such as a so-called curl, for example, a wavy web edge. The curl may be caused, for example, by changes in air humidity and / or ambient temperature. The curl may pose a problem during the processing of the printed material. The register sensor functions to detect the print register of the printed indicia present on the web. The register sensor can function for the detection of barcodes or planar codes. The conveyance path may include a so-called decurler 21.

[0068] Each of the drawings shows a die-cutting module 7 of the flat-bed die cutter 1. This module may include, for example, an upper die-cutting plate 8 provided with a die-cutting tool or die-cutting die or die-cutting plate, and a lower die-cutting plate 9 provided with, for example, a corresponding tool or grooved plate. At least one of these two plates may be movably arranged for die-cutting, for example, the lower plate can perform a lifting and lowering movement. At least one of the two plates may preferably have a plurality of (not shown) die-cutting knives. At least one of the two plates may preferably have a separating knife 10. The separating knife is preferably used to separate the die-cut sheet 2a from the web 2. The separating knife can separate the web 2 over its entire width. Alternatively, the separating knife can also separate the web only partially, for example, only in the web edge region.

[0069] Each of the drawings shows one upper so-called kicker roller 11 and a lower kicker roller 12. The kicker roller functions to grip the separated sheet 2a, preferably at a location one-third downstream of the sheet, and discharge it from the die-cutting module 7. At least one of the kicker rollers preferably includes one lip, for example, a rubber lip. This lip can grip the sheet separated from the web.

[0070] FIG. 1 shows a plurality of embodiments having preferably one or more turning rollers 3d and preferably one motor-driven take-up roller 13. The web 2 is sent along a conveyance path 4b to the take-up roller via the turning roller. The take-up roller serves to wind up the unnecessary section 2b of the web 2.

[0071] The section 2b shown in FIG. 1 (and FIGS. 2 and 3) may, for example, contain a so-called curl, or may be deformed in such a way as to be unusable in other forms, damaged, and / or printed. This section is preferably separated from the web by a transverse cut or a partial transverse cut including a tear. The separated section becomes printing waste.

[0072] In the first embodiment shown in FIG. 1, the machine 1 includes one take-up roller 13 disposed upstream of the die-cutting module 7. In this case, the web 2 is preferably sent to the take-up roller via a plurality of turning rollers 3d. In the second and third embodiments shown in FIG. 1 (indicated by dashed or dotted lines), each take-up roller is disposed downstream of the die-cutting module 7. In this case, the web 2 is preferably sent to the take-up roller via one turning roller 3d. The roller 3d is preferably movable. "Upstream" and "downstream" should be understood spatially: in the first embodiment, the take-up roller is disposed in the region on the inflow side of the module 7 relative to the module, and in the second and third embodiments, it is disposed in the region on the outflow side of the module. In the first and second embodiments, each take-up roller is disposed "above", and in the third embodiment, it is disposed "below". "Above" and "below" should also be understood spatially: in the first and second embodiments, each take-up roller is disposed above the plane 14 of the conveyance path of the printed material 2 passing through the module 7, and in the third embodiment, it is disposed below the plane of this path. Preferably, an embodiment with a short conveyance path 4b, for example, the second or third embodiment, is used. When retrofitting a prior art machine, the first embodiment may be suitable if the take-up roller already exists "upstream of the die-cutting module and below the plane". In all three embodiments, the web 2 preferably passes through the die-cutting module 7 before being sent to the take-up roller. Thereby, suitable separation of the web in the die-cutting module is possible, preferably by a separation element of the die-cutting module, for example, by one or more die-cutting knives or at least one separation knife.

[0073] In addition to the three embodiments, FIG. 1 also shows the method of guiding the web to the take-up roller 13 as practiced in the prior art: the web 2 is sent from the stock roller 3c to the take-up roller along the conveyance path 4a shown by the dashed line, that is, inconveniently upstream of the die-cutting module 7 or without passing through the die-cutting module.

[0074] Figure 2 shows two further embodiments (the fourth and fifth), which preferably have a wear direction switch 15, preferably a guide plate 15a, and preferably a wear discharge section 16. The separated web section or sheet 2a is sent to the discharge section via the direction switch; the guide plate assists this. Additionally or alternatively to the discharge section, a shredder (not shown) can be provided for wear. The separation of the web section or sheet 2a from the web 2 may be performed by a cutting device 17, for example a rotating transverse cutting machine 17. The transverse cutting machine may be arranged between the die-cutting module 7 and the kicker rollers 11 and 12; alternatively it may be arranged between the kicker rollers and the discharge section (shown in dashed lines). The take-up roller 13 is not necessary in this embodiment but may be further provided for another purpose.

[0075] Figure 3 shows two further embodiments (the sixth and seventh), which likewise preferably have a wear direction switch 15, preferably a guide plate 15a, and preferably a wear discharge section 16. The separated web section or sheet 2a is sent to the discharge section via the direction switch; the guide plate assists this. Additionally or alternatively to the discharge section, a shredder (not shown) can be provided for wear. The separation of the web section or sheet 2a from the web 2 may be performed by a cutting device 17, for example a rotating transverse cutting machine 17. The transverse cutting machine may be arranged between the die-cutting module 7 and the kicker rollers 11 and 12; alternatively it may be arranged between the kicker rollers and the discharge section (shown in dashed lines). The take-up roller 13 is not necessary in this embodiment but may be further provided for another purpose.

Explanation of reference numerals

[0076] 1 Machine or flatbed die-cutting machine 2 Printed material or web 2a Sheet 2b Web section 2c Abrasion 3 Rollers 3a Paper Feed Roller 3b Roller with Corresponding Roller 3c Stock Roller 3d Deflection Roller 4 Conveyor Path (Paper Feeding) 4a Conveyor Path 4b Conveyor Path 4c Conveyor Path (Die-Cut Product) 5 Curl Sensor 6 Register Sensor 7 Die-Cutting Module 8 Upper Die-Cutting Plate 9 Lower Die-Cutting Plate 10 Separation Knife 11 Upper Kicker Roller 12 Lower Kicker Roller 13 Take-up Roller 14 Plane 15 Abrasion Direction Switcher 15a Guide Plate 16 Abrasion Discharge Section 17 Cutting Device or Horizontal Cutter 18 Printed Image 19 Control Device 20 Feed Roller 21 Decurler

Claims

1. A method for operating a flat-bed die-cutting machine, comprising supplying a printed material (2) as a web (2) to a die-cutting module (7) of the flat-bed die-cutting machine (1), separating a web section (2b) from the web, and removing it as printing waste (2c), wherein: the web (2) is passed through the die-cutting module (7), and the web section (2b) is separated from the web within or downstream of the die-cutting module and removed as printing waste (2c), and the web section (2b) removed as printing waste is generated by laterally separating the web and removed as a printing waste web or printing waste sheet; the printing waste sheet is removed by discharging it or feeding it to a shredder; A method characterized by the above.

2. The method according to claim 1, wherein the web section (2b) is cut by one die-cutting knife (10) of a die-cutting tool or one die-cutting knife of the die-cutting module (7), or the web section is only partially cut by one die-cutting knife of a die-cutting tool or one die-cutting knife of the die-cutting module and then torn, or the web section (2b) is cut by two die-cutting knives (10) of the die-cutting module (7), or the web section is only partially cut by two die-cutting knives (10) of the die-cutting module and then torn.

3. The method according to claim 1, wherein the web section (2b) is cut by a rotating or vertically moving transverse cutting machine (17) different from one die-cutting knife of the die-cutting module, or the web section is only partially cut by a rotating or vertically moving transverse cutting machine different from one die-cutting knife of the die-cutting module and then torn.

4. The method according to claim 2 or 3, wherein the separated web section (2b) is moved out of the die-cutting module (7) by a roller pair (11, 12).

5. The method according to claim 4, which cites claim 3, wherein the transverse cutting machine (17) is arranged upstream or downstream of the roller pair (11, 12).

6. The method according to any one of claims 1 to 5, wherein the sheet (2c) is discharged from the conveying path (4c) by a diverter (15).

7. The method according to any one of claims 1 to 6, wherein the die-cutting module (7) is accurately aligned with and operated and / or actuated at an accurate speed with respect to the printed image (18) of the printed display on the web (2) during or after removal of the web section (2b).

8. The method according to claim 7, wherein the supply of the web (2) to the flat-bed die-cutting machine (1) and the passage of the web through the die-cutting module (7) are started at the start of production and then continued without interruption during the removal of the web section and during die-cutting which is accurately aligned and carried out at an accurate speed, and are stopped only at the end of the production.

Images