Method for profile blanking of an initial stack and blanking device for performing the method

Abstract

The invention relates to a method for profile blanking of an initial stack of sheet material and a blanking device for carrying out the method. By providing at least two blanking processes, in a first blanking process a large part of the unprinted area is separated from the printed area and the resulting first blanking waste is collected separately here, whereby the amount of second blanking waste formed in a second blanking process is much smaller than when only a single blanking process is carried out. By collecting the first blanking waste and the second blanking waste separately, the first blanking waste and the second blanking waste can be supplied to appropriate disposal or appropriate recycling, respectively.

Description

Technical Field

[0001] This invention relates to a method for contour cutting of an initial stack (Ausgangsstapel) of sheet material, and more particularly to a method for cutting labels from the initial stack of sheet material. Furthermore, this invention relates to a cutting apparatus for performing this method. Background Technology

[0002] The method and apparatus according to the invention are particularly useful for punching initial stacks formed from a large number of overlapping sheets of material having label embossing portions (or label imprints, i.e., Ekikettenaufdruck). The initial stacks of sheet material are particularly composed of printed paper. In special cases, the individual labels are made of plastic, especially plastic film.

[0003] The initial stack to be punched is, in particular, a pre-cut usable stack (Nutzenstapel) with a cuboid shape. In this regard, the method or apparatus is used to provide the final profile of the pre-cut usable stack. Labels are typically printed on large sheets, which are stacked in the form of hundreds to over 1000 sheets. Such sheet stacks are pre-cut longitudinally and laterally, thereby forming a large number of pre-cut usable stacks, which are then separated. To produce finished labels, a profile punching cutter (also called a punching die) with a closed profile is used. Punching is performed such that the stack to be punched is pressed against the profile punching cutter as soon as it is pushed into it, wherein punching waste is generated.

[0004] EP 1 584 432 B1 discloses a method for contour cutting of an initial stack of sheet material and a cutting device for performing the method.

[0005] When contour-cutting an initial stack of sheet material (especially for label production), a problem arises where the labels to be cut often deviate from a rectangular shape. Consequently, the pre-cut square initial stack supplied to the cutting device consists of rectangular sheets or blobs with relatively large unprinted areas. To obtain good results from the cut labels, especially to avoid unprinted edges, the labels are typically cut so that the contour-cutting blade penetrates the corresponding sheet or initial stack in the printed area, ensuring the label's outer contour is printed. However, this results in the problem of printed areas in the die-cutting waste. The handling and / or recycling of printed waste is associated with higher costs and greater expenses compared to waste with unprinted areas. Summary of the Invention

[0006] Accordingly, the object of the present invention is to provide a method in which the amount of die-cutting waste during printing can be reduced. Furthermore, the object of the present invention is to provide an apparatus for performing the method according to the invention.

[0007] These tasks are accomplished by a method having the features of claim 1 and a punching apparatus having the features of claim 3.

[0008] The method according to the invention for contour cutting of an initial stack of sheet materials, particularly for cutting labels from an initial stack of sheet materials, comprises the following steps:

[0009] - Provide an initial stack of sheet materials to be punched, wherein the respective sheets have a printed area and an unprinted area (preferably completely) surrounding the printed area, wherein the printed area of ​​the respective sheet has an outer contour.

[0010] - A first contour cutting blade (also called a cutting iron) is provided, wherein the cutting contour of the first contour cutting blade is larger than the outer contour of the area to be printed.

[0011] - The initial stack is pressed or pushed into the first profile die to form a pre-dieed stack such that the first profile die penetrates the initial stack only in the unprinted areas, so that the first die-cutting waste formed in the first die-cutting process does not contain the printed areas.

[0012] - Collect the first punching waste.

[0013] - A second contour cutting blade is provided, wherein the cutting contour of the second contour cutting blade is smaller than or corresponds to the outer contour of the area to be printed.

[0014] - The pre-punched stack is pressed into the second profile punching blade to form a usable stack, especially a stack for forming punched labels, such that the second profile punching blade cuts through the pre-punched stack in the area to be printed, especially only in the area to be printed, so that the second punching waste formed in the second punching process has the area to be printed.

[0015] - Collect the second blanking waste, wherein the second blanking waste is collected separately from the first blanking waste.

[0016] By incorporating at least two die-cutting processes, the majority of the unprinted areas are separated from the printed areas in the first die-cutting process, and the resulting first die-cutting waste is collected separately. Consequently, the amount of second die-cutting waste generated in the second die-cutting process is significantly less than when only a single die-cutting process is performed. By collecting the first and second die-cutting wastes separately, they can be supplied to appropriate processing or recycling facilities, respectively.

[0017] The initial stack of sheet material, particularly the corresponding sheets, preferably has a cuboid shape. The initial stack can be, in particular, a pre-cut initial stack, wherein the initial stack is pre-cut such that for each sheet of the pre-cut initial stack, there exists only a unique closed area for printing, particularly a unique label embossing portion for each sheet of the pre-cut initial stack. The label embossing portion forms the printed area. It is entirely conceivable that the printed area extends partially to the edge of the corresponding sheet. The label embossing portion preferably has a larger dimension than the final label.

[0018] A particularly advantageous aspect is that the pre-punched stack is pressed into the second profile cutting blade, i.e., the initial stack acts on the pre-punched stack when the initial stack is pressed into the first profile cutting blade. This eliminates the need for separate manipulation of the pre-punched stack. Specifically, a guide structure is provided between the first and second profile cutting blades, which guides the movement of the pre-punched stack as it is pushed toward the second profile cutting blade.

[0019] The blanking apparatus according to the invention is used to perform the method according to the invention. For this purpose, the blanking apparatus has a first profile blanking cutter with a blanking profile, a second profile blanking cutter with a blanking profile, and a die movable along the direction of the first profile blanking cutter, the die being used to press an initial stack into the first profile blanking cutter. The dimension of the blanking profile of the first profile blanking cutter is here larger than the dimension of the blanking profile of the second profile blanking cutter. A pre-blanked stack is formed as the first profile blanking cutter passes through the initial stack. The apparatus has a first collection mechanism for collecting the first blanking waste formed as the first profile blanking cutter passes through the initial stack. The second profile blanking cutter is arranged downstream of the first profile blanking cutter in the direction of die movement, so that the pre-blanked stack is pressed into the second profile blanking cutter as the die moves toward the first profile blanking cutter. The apparatus has a second collection mechanism for collecting the second blanking waste formed as the second profile blanking cutter passes through the pre-blanked stack. The first and second collection mechanisms are different, thus collecting the first and second blanking wastes separately from each other.

[0020] It is entirely conceivable that the first and second collection mechanisms are components of a common waste collection mechanism, for example, the collection mechanisms are formed through different grid layers of the waste collection mechanism.

[0021] It is advantageous that the geometry of the blanking profile of the first profile blanking knife can be transformed into the geometry of the blanking profile of the second profile blanking knife by scaling, wherein the scaling factor is less than 1.

[0022] Preferably, not only the geometry of the blanking profile of the first profile blanking knife but also the geometry of the blanking profile of the second profile blanking knife corresponds at least substantially to the geometry of the outer profile of the area to be printed.

[0023] It is particularly advantageous that the contour cutting blades are arranged in a nested manner.

[0024] Preferably, both the first and second contour cutting cutters are constructed in a substantially hollow conical shape. Thus, the second contour cutting cutter can be arranged inside the first contour cutting cutter.

[0025] The punching device has at least one discharge element for discharging the first punching waste into the first collection mechanism and / or for discharging the second punching waste into the second collection mechanism.

[0026] The lead-out element can be, for example, a plate-shaped element, such as in the form of a partition wall. It is entirely conceivable and preferred that the lead-out element extends between the two profile cutting blades toward the collecting mechanism.

[0027] As a particular advantage, the corresponding collection mechanism is arranged below the corresponding contour cutting blade.

[0028] It is particularly advantageous that the first and / or second collection mechanisms are waste containers, especially rolling waste containers. The waste containers are preferably commercially available trash cans. In particular, the device has waste containers that can be operated separately from each other.

[0029] It is particularly advantageous that the first and / or second contour cutting cutters are supported in the cutting device in a displaceable and / or oscillating manner, especially that the contour cutting cutters are supported in the cutting device in a displaceable and / or oscillating manner relative to each other. This allows the first and / or second contour cutting cutters to change their position in a particularly simple manner, especially to achieve optimal orientation of the respective contour cutting cutters relative to the initial stack or pre-cut stack and / or the cut stack.

[0030] It is particularly advantageous that the first and second profile cutting cutters are supported in a common support structure, which is pivotally and / or displaceably supported in the cutting device. This allows the first and second profile cutting cutters to be oriented together, especially relative to the initial stack. In this case, it is entirely conceivable that the position and orientation of the first profile cutting cutter relative to the second profile cutting cutter remain unchanged.

[0031] However, it is also entirely conceivable that the first profile cutting cutter and / or the second profile cutting cutter can be displaced and / or oscillatingly supported in the support structure.

[0032] It is particularly advantageous that the blanking profile of the first profile blanking knife and / or the blanking profile of the second profile blanking knife are constructed as closed profiles. Attached Figure Description

[0033] The invention is illustrated in more detail with reference to embodiments in the following figures, but is not limited thereto. Wherein:

[0034] Figure 1 A schematic diagram of an embodiment of the punching device according to the present invention is shown in the side view.

[0035] Figure 2 This shows that during the punching process, according to Figure 1 The punching device,

[0036] Figure 3 The initial stack of sheets with embossed labels is shown in a top view.

[0037] Figure 4 Showing according to Figure 3 The sheet material, in which the blanking outline of the first blanking blade is drawn.

[0038] Figure 5 This shows the second blanking scrap generated during the second blanking process.

[0039] Figure 6 A schematic diagram showing the blanking profile of the first profile blanking tool is provided.

[0040] Figure 7 A schematic diagram showing the blanking profile of the second profile blanking tool is provided. Detailed Implementation

[0041] Figure 1 and 2A blanking apparatus according to the invention is shown, wherein the blanking apparatus has a first profile blanking knife 7 with a blanking profile 8, a second profile blanking knife 9 with a blanking profile 10, and a die 15 displaceable in the movement direction X. The die 15 can be moved by means of a driver 16. The die 15 is used to press an initial stack 1 into the first profile blanking knife 7.

[0042] The initial stack 1 is formed by multiple sheets stacked on top of each other and pre-cut so that the initial stack is square and each sheet has a unique label embossing 20 printed on it. In this respect, each sheet or sheet 3 has a printed area 4, i.e., the label embossing 20, and an unprinted area 5 surrounding the printed area 4, wherein the printed area 4 has an outer contour 6. The label embossing 20 has a slightly larger dimension than the final cut label 2. Currently, label 2 is for the bottle neck area.

[0043] The cutting profile 8 of the first profile cutting blade 7 and the cutting profile 10 of the second profile cutting blade 9 can currently be approximately converted to each other by shrinkage, wherein the cutting profile 8 of the first profile cutting blade 7 is slightly larger than the outer profile 6 of the area 4 to be printed, and the cutting profile 10 of the second profile cutting blade 9 is slightly smaller than the outer profile 6 of the area 4 to be printed. The cutting profile 10 of the second profile cutting blade 9 corresponds to the outer profile of the final label 2.

[0044] In accordance with Figure 1 During the punching process of the punching device, the initial stack 1 is moved towards the first profile punching knife 7 by means of the die 15 and pressed into the profile punching knife 7, thus forming a pre-punched stack 11. The first punching waste 12 formed during this punching process is collected in a first collection mechanism 17, which is arranged below the first profile punching knife 7. During this first punching process, the first profile punching knife 7 penetrates the initial stack 1 only in the unprinted area 5 of the initial stack 1 or the corresponding sheet 3, as this... Figure 4 As illustrated schematically. In this regard, the area of ​​the first die-cutting waste 12 formed in the first die-cutting process that is not printed.

[0045] The die-cutting device is configured such that the pre-die-cut stack 11 is pressed into the second profile die-cutting blade 9, i.e., the initial stack 1 acts on the pre-die-cut stack 11 when the initial stack 1 is pressed into the first profile die-cutting blade 7 by means of the die 15, and the pre-die-cut stack is pressed into the second profile die-cutting blade 9. When the pre-die-cut stack 11 is pressed into the second profile die-cutting blade 9, a usable stack 13 including the final die-cut label 2 is formed. The second profile die-cutting blade 9 penetrates the pre-die-cut stack 11 only in the printed area 4, so that the second die-cutting waste 14 formed in the second die-cutting process has the printed area 4 and the unprinted area 5. Exemplarily, the second die-cutting waste 14 for a single sheet 3 is... Figure 5 As shown in the image. Figure 5 The blanking waste 14 shown is annular, having an inner printed area 4 and an unprinted area 5 that radially surrounds the printed area 4.

[0046] The die-cutting apparatus has a second collection mechanism 18 for collecting the second die-cutting waste 14 formed during the second die-cutting process. To prevent the first die-cutting waste 12 from mixing with the second die-cutting waste 14 and to ensure a reliable supply of the formed die-cutting wastes 12, 14 to the respective collection mechanisms 17, 18, the die-cutting apparatus has two exit elements 19. One exit element 19 extends from the first profile die-cutting blade 7 toward the adjacent sidewall of the collection mechanisms 17, 18, while the other exit element 19 extends from the second profile die-cutting blade 9 toward the sidewall of the second collection mechanism 18 opposite to the adjacent sidewall. Therefore, this die-cutting apparatus ensures that only the unprinted first die-cutting waste 12 is collected in the first collection mechanism 17, which can be processed separately from the at least partially printed second die-cutting waste 14 collected in the second collection mechanism 18. This reduces the cost of waste disposal, as the cost of processing printed material is typically higher than that of processing unprinted material. The unprinted material can be resold as valuable material. Therefore, overall costs can be saved by separating printed and unprinted waste.

[0047] List of reference numerals in the attached diagram:

[0048] 1 Initial stack

[0049] 2 tags

[0050] 3 sheets

[0051] 4 Printed areas

[0052] 5 Unprinted areas

[0053] 6 Outer contour

[0054] 7 First contour cutting knife

[0055] 8-cut profile

[0056] 9 Second contour cutting knife

[0057] 10-cut profile

[0058] 11 Pre-punched stacks

[0059] 12 First punching scrap

[0060] 13 available stacks

[0061] 14 Second punching scrap

[0062] 15 stamping dies

[0063] 16 drives

[0064] 17 First Collection Agency

[0065] 18 Second Collection Agency

[0066] 19 Exported Components

[0067] 20 Label Imprinting Section

Claims

1. A method for contour blanking of an initial stack (1) of sheet material, wherein, The method has the following method steps: - providing an initial stack (1) to be punched out of sheet-like material, wherein the respective sheet (3) has a printed area (4) and an unprinted area (5) surrounding the printed area, wherein the printed area (4) has an outer contour (6), - providing a first profiled punch (7), wherein a first punching contour (8) of the first profiled punch (7) is larger than the outer contour (6) of the printed area (4), - pressing the provided initial stack (1) into the first profiled punch (7) for forming a pre-punched stack (11) in such a way that the first profiled punch (7) penetrates the initial stack (1) only in the unprinted area (5), so that a first punching waste (12) formed in this first punching process does not carry a printed area, - collecting the first punching waste (12), - providing a second profiled punch (9), wherein a second punching contour (10) of the second profiled punch (9) is smaller than the outer contour (6) of the printed area (4) or corresponds to the outer contour (6) of the printed area (4), - pressing the pre-punched stack (11) into the second profiled punch (9) for forming a stack of punched-out labels (2) in such a way that the second profiled punch (9) cuts through the pre-punched stack (11) in the printed area (4), so that a second punching waste (14) formed in this second punching process has a printed area (4), - collecting the second punching waste (14), wherein the second punching waste (14) is collected separately from the first punching waste (12).

2. The method of claim 1, wherein, The method is a method for punching out labels (2) from an initial stack (1) of sheet-like material.

3. The method according to claim 1, wherein the second profiled punch (9) cuts through the pre-punched stack (11) only in the printed area (4), so that a second punching waste (14) formed in this second punching process has a printed area (4).

4. The method of any one of claims 1 to 3, wherein, The pressing of the pre-punched stack (11) into the second profiled punch (9) is achieved in that the initial stack (1) acts on the pre-punched stack (11) when the initial stack (1) is pressed into the first profiled punch (7).

5. A blanking device for performing the method according to any one of claims 1 to 4, wherein, The blanking device has a first profile blanking tool (7) with a first blanking contour (8), a second profile blanking tool (9) with a first blanking contour (8), wherein the first blanking contour (8) of the first profile blanking tool (7) has a larger size than the second blanking contour (10) of the second profile blanking tool (8), wherein the device has a die (15) which is movable in the direction of the first profile blanking tool (7) and serves to press an initial stack (1) into the first profile blanking tool (7) for forming a pre-blanked stack (11) when the first profile blanking tool (7) is passed through the initial stack (1), wherein the device has a first collection mechanism (17) for collecting first blanking waste (12) formed when the first profile blanking tool (7) is passed through the initial stack (1), wherein the second profile blanking tool (9) is arranged downstream of the first profile blanking tool (7) in the direction of movement (X) of the die (15), so that the pre-blanked stack (11) is pressed into the second profile blanking tool (9) when the die (15) is moved in the direction of the first profile blanking tool (7), wherein the device has a second collection mechanism (18) for collecting second blanking waste (14) formed when the second profile blanking tool (9) is passed through the pre-blanked stack (11), wherein the first collection mechanism (17) and the second collection mechanism (18) are not identical.

6. The apparatus of claim 5, wherein, The geometry of the first blanking contour (8) of the first profile blanking tool (7) can be transformed into the geometry of the second blanking contour (10) of the second profile blanking tool (9) by scaling, wherein the scaling factor is less than 1.

7. The apparatus of claim 5 or 6, wherein, The blanking device has a drive (16) for moving the die in the direction of the first profile blanking tool (7).

8. The apparatus of claim 5 or 6, wherein, The profile blanking tools (7, 9) are arranged nested in each other.

9. The apparatus of claim 5 or 6, wherein, The blanking device has at least one guide element (19) for guiding the first blanking waste (12) into the first collection mechanism (17) and / or for guiding the second blanking waste (12) into the second collection mechanism (18).

10. The apparatus of claim 5 or 6, wherein, The first collection mechanism (17) and / or the second collection mechanism (18) is a waste container.

11. The apparatus of claim 10, wherein, The first collection mechanism (17) and / or the second collection mechanism (18) is a rollable waste container.

12. The apparatus of claim 5 or 6, wherein, The first profile blanking tool (7) and / or the second profile blanking tool (9) is displaceably and / or oscillatably supported.

13. The apparatus of claim 12, wherein, The profile blanking tools (7, 9) are supported displaceably and / or oscillatably relative to each other.

14. The apparatus of claim 5 or 6, wherein, The first profile blanking tool (7) and the second profile blanking tool (9) are supported in a common support structure, wherein the support structure is oscillatably and / or displaceably supported in the blanking device.

15. The apparatus of claim 14, wherein, The first profile blanking tool (7) and / or the second profile blanking tool (8) is displaceably and / or oscillatably supported in the support structure.

16. The apparatus of claim 5 or 6, wherein, The first blanking contour (8) of the first profile blanking tool (7) and / or the second blanking contour (10) of the second profile blanking tool (9) is configured as a closed contour.

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