Machine for processing printed material with devices for cutting-out and separation of waste

Abstract

A machine according to the invention for further processing printing material, comprising a punching module (10) for punching the printing material (2), which has a punching device (11), an upstream first traction group (50) and a downstream second traction group (51) for the printing material (2), a transport module (30) for further transporting the printing material (2), which has at least one length-adjustable transport section (31), and a transfer device (40) for transferring the printing material (2) from the punching module (10) to a downstream module (20), which comprises a length-adjustable transfer section (41), is characterized in that a stripping module (20) is arranged as a downstream module between the punching module (10) and the transport module (30), which stripping module has an upstream third traction group (52) for the printing material (2) and which, depending on a sheet format (63) in the processing direction (3) of the machine (1) is positionable,and that the transfer device (40) transfers the printing material (2) from the punching module (10) to the stripping module (20), wherein the length (31a) of the transport section (31) and the length (41a) of the transfer section (41) are adjustable according to the position (22) of the stripping module (20). The invention advantageously enables modifications to the machine to be made in such a way that they require little time and do not cause any loss of quality in subsequent production. The invention is used, for example, in machines used in industrial, i.e., highly productive and high-quality packaging printing or in the manufacture (printing and further processing) of packaging such as folding boxes.

Description

[0001] The invention relates to a machine for further processing printing material with the features of the preamble of claim 1. field of technology

[0002] The invention lies in the technical field of the graphic industry and there in particular in the field of operating a finishing machine, in particular a flexographic printing machine with inline finishing such as inline flatbed die cutting, and the processing of initially web-shaped printing material and in particular in the production of panels for packaging, especially for folding trays. State of the art

[0003] Printing machines for packaging printing with inline die-cutting modules are already known, e.g., a flexographic printing press with an inline flatbed die-cutter. The machine first prints a cardboard web and then cuts it into cross-cut sheets to form folding boxes. Such machines may require modifications, which may change the spacing of certain modules.

[0004] In this context, US9828199B2 discloses a length-adjustable transfer device between a punching module or its downstream pulling group and a vacuum transport module of a machine in packaging printing.

[0005] For example, when consecutively processing different (sheet) formats and / or die-cutting formats, machine modifications may be necessary. These modifications often require significant time and thus negatively impact production costs. Furthermore, if not implemented correctly, such modifications can lead to a loss of quality in production. Technical task

[0006] It is therefore an object of the present invention to provide an improvement over the prior art which, in particular, makes it possible to make changes to the machine in such a way that they take up little time and do not cause any loss of quality in the subsequent production. Inventive solution to the problem

[0007] This object is achieved according to the invention by a device according to claim 1.

[0008] Advantageous and therefore preferred developments of the invention emerge from the subclaims as well as from the description and the drawings.

[0009] A machine according to the invention for further processing printing material, comprising a punching module for punching the printing material, which has a punching device, an upstream first pulling group and a downstream second pulling group for the printing material, a transport module for further transporting the printing material, which has at least one variable-length transport section, and a transfer device for transferring the printing material from the punching module to a subsequent module, which comprises a variable-length transfer section, is characterized in that a stripping module is arranged as a subsequent module between the punching module and the transport module, which stripping module has an upstream third pulling group for the printing material and which can be positioned in the processing direction of the machine depending on a sheet format, and in that the transfer device transfers the printing material from the punching module to the stripping module,the length of the transport section and the length of the transfer section are adjustable according to the position of the stripping module. Advantageous embodiments and effects of the invention

[0010] The invention advantageously makes it possible to make changes to the machine in such a way that they take up little time and do not cause any loss of quality in the subsequent production.

[0011] The invention is used, for example, in machines used in industrial, i.e. highly productive and high-quality packaging printing or in the manufacture (printing and further processing) of packaging such as folding boxes.

[0012] A (further processing) machine according to the invention comprises a positionable unit, i.e., the stripping module, and two length-adjustable units, i.e., the transport section and the transfer section. "Positionable" means that the module is arranged in a first position for one (production) order and in a different position for another order, with the two positions differing from each other only horizontally and being (essentially) identical vertically; thus, the module is moved horizontally. Positioning is preferably achieved by sliding, e.g., on dedicated rails and preferably motor-driven. Furthermore, "length-adjustable" means that a length in the horizontal direction is changed from one (production) order to another.This change in length is preferably carried out in such a way that changes in distance caused by positioning are (essentially) compensated between the machine modules involved.

[0013] The invention offers the advantage that the printing material to be processed by the machine in its processing direction is always guided and transferred in a safe and controlled manner on its way from the punching module to the stripping module, through the stripping module, and to the transport module, and is thus always in its optimal (processing) position. Disturbing "floating" of the sheet is prevented. As a result, the machine exhibits a high level of overall process reliability, in particular high stripping accuracy, even at high processing speeds. The quality of the produced products, e.g., folding box blanks, can be increased by the invention, and waste can be prevented or reduced.

[0014] In a machine according to the invention, a sheet punched by the punching module is always guided through rollers on its way to the stripping mode: either through the pull rollers of the second pull roller group, the pull rollers of the third pull roller group or (temporarily) through both together.

[0015] The punching module is preferably a flatbed punch. The printing material is preferably web-shaped and is cross-cut or cross-punched into sheets (up to nips, which are then torn through). The machine can be designed as a flatbed punching machine. The machine can also include upstream printing units, e.g., flexographic printing units; in this respect, the machine can be a flexographic printing press with an inline flatbed punch. The machine can preferably process cardboard in web form and can preferably produce panels for folding boxes.

[0016] The inventive change of the length of the transport section and the transfer section when changing over to a new format to be processed can be carried out manually by the operating personnel; alternatively, it can be effected by motor and preferably automatically. Further developments of the invention

[0017] Preferred developments of the invention (hereinafter referred to as "developments") are described below. These can also be combined with one another where not technically mutually exclusive.

[0018] A further development can be characterized in that the first tension group comprises at least two interacting first tension rollers. A further development can be characterized in that the second tension group comprises at least two interacting second tension rollers. A further development can be characterized in that the third tension group comprises at least two interacting third tension rollers. For the interaction, the respective rollers are preferably positioned next to one another. A further development can be characterized in that the tension groups each comprise an upper roller and a lower roller. A further development can be characterized in that the upper roller of the second tension group is rubberized. A further development can be characterized in that the lower roller of the second tension group is coated. The upper and lower rollers of the other two tension groups can also be designed in this way.The rubber coating is used in particular to ensure the safe guidance of the sheet being transported.

[0019] A further development can be characterized in that the distance between the second pull group and the third pull group is smaller than the sheet format. A further development can be characterized in that the distance between the third pull group and the adjustable roller of the transport section is smaller than the sheet format. The (manual or motor-driven) adjustment of the respective distances to a value smaller than the sheet format to be transported, i.e. smaller than the sheet length in the transport direction, serves in particular to ensure that the sheet to be transported is guided reliably, since this is then always guided by at least one roller or roll. The distance between the second pull group and the first pull group can be greater than the sheet format.A further development can be characterized by the web being intermittently pushed into the punching module by the first pull group, the web being separated into successive sheets in the punching module – except for stopping points – and the sheets being completely separated from the web by the second pull group and conveyed. A further development can be characterized by the sheets subsequently being taken over by the third pull group. A further development can be characterized by the sheets subsequently being taken over by the transport module, in particular by its vacuum belt and / or (infeed) roller.

[0020] A further development can be characterized in that the machine comprises a control device for controlling the feed speed of the first pull group, the second pull group and the third pull group. A further development can be characterized in that the second pull group follows an acceleration profile of the first pull group. A further development can be characterized in that the third pull group follows an acceleration profile of the first pull group or the second pull group. The acceleration profiles of the respective pull groups can also follow the acceleration profile of any upstream printing units, in particular when the machine is started up or shut down. The respective pull groups can have separate drive motors that are controlled by the control device. Preferably, all of the aforementioned rollers and rolls rotate synchronously with one another, i.e. at the same sheet conveying speed.

[0021] A further development can be characterized in that the machine comprises a pivoting support. The support can be made as a frame or a metal plate. A further development can be characterized in that the support can be pivoted about a vertical pivot axis. The pivoting is preferably motorized. A further development can be characterized in that the pivot axis is arranged close to the punching module. A further development can be characterized in that the pivot axis is arranged close to the outlet side of the punching module. "Close" preferably means that the pivot axis is positioned at the minimum possible distance (taking into account the technical and spatial conditions of the machine, including tolerances). A further development can be characterized in that the stripping module is arranged on the support. A further development can be characterized in that the transport module is arranged on the support.The stripping module and transport module can be pivoted in this way. This prevents problems during further processing caused by so-called "skew printing," as the modules—and thus their components, especially tools and stripping needles, for example—can be accurately aligned to the (skew) printed image.

[0022] A further development can be characterized in that the length-adjustable transport section comprises a circulating vacuum belt. A further development can be characterized in that the length-adjustable transport section comprises an adjustable roller for the vacuum belt. A further development can be characterized in that the adjustable roller is a deflection roller for the vacuum belt. A further development can be characterized in that the adjustable roller is adjustable horizontally. A further development can be characterized in that the length-adjustable transport section comprises a telescopic device for adjusting the position of the roller. In this way, the roller can be positioned close to the stripping module and the sheet can be guided reliably when transferred from the stripping module to the transport module.A further development can be characterized by the position of the adjustable roller being adjustable such that the distance to the stripping module is minimal. A further development can be characterized by the variable-length transport section comprising at least one adjusting roller. "Close" preferably means positioning at the minimum possible distance (taking into account the technical and spatial conditions of the machine, including tolerances).

[0023] A further development can be characterized in that the length-adjustable transfer section comprises a length-adjustable roller blind or tray for supporting the printing material. A further development can be characterized in that the length of the roller blind or tray is adjustable horizontally. For this purpose, the roller blind can comprise an indentation; the tray can, for example, be pushed together telescopically. A further development can be characterized in that the roller blind or tray comprises an element for hanging on the stripping module or on its second pull group. The hanging element can, for example, be hook-shaped and preferably comprise one or more hooks. A further development can be characterized in that the roller blind comprises a textile or a film, e.g. a fabric, a fabric-reinforced tarpaulin or a steel foil.

[0024] A further development can be characterized in that the machine comprises a feed module upstream of the punching module. A further development can be characterized in that the machine comprises at least one printing unit, preferably several for CMYK multi-color printing, upstream of the feed module. A further development can be characterized in that the machine comprises a blanking module downstream of the transport module.

[0025] The features and combinations of features disclosed in the above sections Technical Field, Invention and Further Developments as well as in the following section Exemplary Embodiments represent - in any combination with one another - further advantageous developments of the invention. Embodiments of the invention and figures

[0026] The Figures 1 and 2show a preferred embodiment of the invention and some of its preferred developments. Corresponding features are provided with the same reference numerals in the figures. Recurring reference numerals have been partially omitted for clarity.

[0027] Figure 1 shows a schematic representation of a longitudinal sectional view of a preferred embodiment of a machine according to the invention.

[0028] Figure 2 shows (for reasons of clarity) essentially the same representation with additional reference symbols.

[0029] Figure 1 and Figure 2show a machine 1 which processes and in particular further processes a - substantially horizontally - transported printing material 2, i.e. initially a web 2a and then sheets 2b produced by cross-cutting or punching (and tearing off), for example punching, breaking out and separating and laying out the blanks produced in this way. The printing material, e.g. made of cardboard, has preferably already been printed in multiple colors by upstream printing units (not shown), e.g. using the flexographic printing process. The printing material 2 is transported substantially in direction 3. For this transport, the machine 1 has at least one motor 4. The machine 1 can be used to produce blanks for folding boxes.

[0030] The machine 1 comprises a punching module 10 with an inlet side 10a and an outlet side 10b for the printing material 2, as well as with a punching device 11, which in turn comprises a vertically movable punching tool 12. The punching module is preferably arranged stationary on a floor 92 of a production facility, e.g., a printing shop, and is therefore not movable (for reasons of clarity, the machine is shown with a distance from the floor).

[0031] Furthermore, the machine 1 comprises a stripping module 20 (as the module following the punching module 10) with an inlet side 20a and an outlet side 20b for the printing substrate 2, as well as with a rotating stripping tool 21. According to the invention, the stripping module 20 can be adjusted, preferably displaced, in its positioning 22 in the horizontal direction 90 for changing jobs of different formats. For this purpose, the stripping module can be displaced on the floor 92. Rails (not shown) can be provided on the floor 92 for this purpose.

[0032] Following the stripping module 20, the machine 1 comprises a transport module 30 with an inlet side 30a and an outlet side 30b for the printing material 2. A transport section 31 of the transport module 30 has a variable length 31a (in the horizontal direction 90). For this purpose, the transport section 31 comprises a variable-length vacuum belt 32, which is guided around at least one roller 33, preferably around a plurality of more than the two rollers shown, wherein the roller 33 is movable in the horizontal direction by means of a telescopic device and is thus adjustable. The roller 33 interacts with a positioning roller 35 so that the printing material 2 is securely guided and, in particular, pulled. The vacuum belt 32 can be guided around an adjustable compensating roller (not shown), by adjusting which the path and thus the length of the belt in the direction of the stripping module 20 can be changed or adapted.

[0033] Between the two modules 10 and 20, a transfer device 40 is arranged with a transfer section 41 having a variable length 41a, e.g., an extendable roller blind 42 made of fabric or tarpaulin. The roller blind 42 can be attached to the punching module 10 and suspended from the stripping module 20 by means of an element 43, or vice versa.

[0034] The machine 1 comprises three pull groups for transporting the printing substrate 2: a first pull group 50 with two cooperating first pull rollers 50a; a second pull group 51 with two cooperating second pull rollers 51a; and a third pull group 52 with two cooperating third pull rollers 52a; wherein each pair of pull rollers comprises an upper roller 53 and a lower roller 54 with respect to the printing substrate 2. Preferably, each pull group is driven by its own servo motor 4. The drive is preferably intermittent and coordinated with the stroke of the punching tool 12.

[0035] The two Figures 1 and 2 also show different distances: a distance 60 between the first pull group 50 and the second pull group 51; a distance 61 between the second pull group 51 and the third pull group 52; a distance 62 between the third pull group 52 and the roll 33. In addition, the format or length 63 of an exemplary sheet 2b is shown (the sheet is shown above the punching module 10 only for reasons of clarity).

[0036] It can be seen that the distances 61 and 62 are shorter than the length 63 of sheet 2b. In practice, the distances 61 and 62 will be only slightly shorter than the length 63 of sheet 2b. This ensures that sheet 2b is always guided by one of the second pull group 51, the third pull group 52, the vacuum belt 32, or the roller 33 (including the adjusting roller 35) and never "floats." The distance 60 can be slightly larger than the length 63, since sheet 2b is not yet completely separated from web 2a in the area of ​​the punching module 10 and is only torn off from web 2a by the advance of the second pull group 51.

[0037] The two Figures 1 and 2also show a support 70, which is pivotally mounted about a vertical axis 71. The stripping module 20 and the transport module 30 are preferably arranged on this support and thus pivotable with it. A pivot drive (not shown), e.g., a motor and a drive spindle, can be arranged at the end of the support 70 opposite the pivot axis.

[0038] The machine 1 further comprises a control device 72, preferably a digital computer, which controls the individual components of the machine, in particular the modules 10, 20, and 30, including their traction groups 50, 51, and 52, as well as the roller 33, such that the printing substrate 2 is reliably guided and transported in coordination with the feed of a web 2b and the punching process. An upstream feed module 73, which changes the continuous web feed to an intermittent one, and a downstream blanking module 74 can also be controlled by the control device 72. List of reference symbols

[0039] 1Machine, finishing machine 2Printing material 2aWeb 2bSheet, cross-cut from web 3Processing direction, transport direction 4Motor(s) 10Die-cutting module 10aInlet side 10bOutlet side 11Die-cutting device 12Die-cutting tool 20Stripping module as downstream module 20aInlet side 20bOutlet side 21Stripping tool 22Variable position of the stripping module 30Transport module 30aInlet side 30bOutlet side 31Transport section 31aVariable length of the transport section 32Vacuum belt 33Roller, inlet roller 34Telescopic device 35Adjusting roller 40Transfer device 41Transfer section 41aVariable length of the transfer section 42Roller blind or tablet 43Element for hanging 50First pull group 50aFirst pull rollers 51Second Pull group 51asecond pull rollers 52third pull group 52athird pull rollers 53top roller 54bottom roller 60distance between first and second pull group 61distance between second and third pull group 62distance between third pull group and roller 63sheet format,Arc length 70Carrier 71Swivel axis 72Control device 73Feed module 74Depaneling module 90Horizontal 91Vertical 92Floor,

Claims

1. A machine for further processing printing material, comprising a punching module (10) for punching the printing material (2), which has a punching device (11), an upstream first pulling group (50) and a downstream second pulling group (51) for the printing material (2), a transport module (30) for further transporting the printing material (2), which has at least one variable-length transport section (31), and a transfer device (40) for transferring the printing material (2) from the punching module (10) to a subsequent module (20), which comprises a variable-length transfer section (41), characterized by thata stripping module (20) is arranged as a subsequent module between the punching module (10) and the transport module (30), which has an upstream third pulling group (52) for the printing material (2) and which can be positioned in the processing direction (3) of the machine (1) depending on a sheet format (63), and in that the transfer device (40) transfers the printing material (2) from the punching module (10) to the stripping module (20), wherein the length (31a) of the transport section (31) and the length (41a) of the transfer section (41) can be adjusted in accordance with the position (22) of the stripping module (20).

2. Machine according to claim 1, characterized by that the distance (61) of the second pull group (51) to the third pull group (52) is smaller than the sheet format (63) and / or that the distance (62) of the third pull group (52) to the adjustable roller (33) of the transport section (31) is smaller than the sheet format (63).

3. Machine according to one of the preceding claims, characterized by that the machine (1) comprises a control device (72) for controlling the feed speed of the first train group (50), the second train group (51) and the third train group (52).

4. Machine according to one of the preceding claims, characterized by that the machine (1) comprises a pivotable support (70).

5. Machine according to claim 4, characterized by that the carrier (70) is pivotable about a vertical pivot axis (71).

6. Machine according to one of the preceding claims 4 or 5, characterized by that the stripping module (20) is arranged on the carrier (70).

7. Machine according to one of the preceding claims, characterized by that the length-variable transport section (31) comprises a circulating vacuum belt (32).

8. Machine according to claim 7, characterized by thatthe length-adjustable transport section (31) comprises an adjustable roller (33) for the vacuum belt (32).

9. Machine according to claim 8, characterized by that the length-adjustable transport section (31) comprises a telescopic device (34) for adjusting a position of the roller (33).

10. Machine according to one of the preceding claims, characterized by that the length-adjustable transfer section (41) comprises a length-adjustable roller blind (42) or tray (42) for supporting the printing material (2) and that the roller blind (42) or tray (42) comprises an element (43) for hanging on the stripping module (20) or on its second pulling group (51).

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