[0029] Such as figure 1 It can be seen that the first embodiment 1 of the device according to the present invention for perforating the film 2 includes at least one cutting member 3 and at least one corresponding cutting member 5. The film 2 is in contact with the film 2 through the cutting member and the corresponding cutting member. Made in punches. Preferably, the cutting member 3 is arranged on a cutting roller 7 having a rotation direction 7a or another rotatable holding device, and the corresponding cutting member 5 is arranged on a corresponding cutting roller 9 having a rotation direction 9a or another rotatable holding device. On the device, where the rotating shafts 7b and 9b are oriented parallel to each other. In addition as figure 1 As shown, on the cutting roller 7, especially at least two cutting elements 3 are evenly distributed peripherally, and on the corresponding cutting roller 9 there are corresponding number of corresponding cutting elements 5 evenly distributed peripherally. It is particularly advantageous if there are four peripherally distributed cutting elements 3 and corresponding cutting elements 5 in each case.
[0030] On the cutting roller 7 and on the corresponding cutting roller 9, a driving motor 11, 13 is respectively provided. These driving motors 11 and 13 are synchronized by the control unit 15 in such a way that in the rotation of the cutting roller 7 and the corresponding cutting roller 9, each cutting member 3 is opposed to the corresponding cutting member 5. The suitable rotation positions of the rollers 7, 9 are defined by the indicated rotation angles α, β, for example. The film 2 is continuously moved between the cutting roller 7 and the corresponding cutting roller 9 in the direction of the arrow 2a.
[0031] The cutting element 3 is preferably elastically supported in the radial direction on a mechanical, pneumatic or hydraulic elastic device 17 and guided in the peripheral direction. For the sake of overview, the related guides are not shown. The elastic support device can alternatively or supplementally be provided on the corresponding cutting roller 9 for the corresponding cutting element 5. However, in order to facilitate a more overview illustration, this is also not shown.
[0032] The corresponding cutting element 5 can be adjusted preferably in the direction of the double arrow 5a by means of an adjustment device 19. These adjustment devices can be actuated, for example, mechanically or by means of an adjustment drive (not shown), which in particular can be actuated by the control device 15. In the interaction with the corresponding cutting element 3, along the longitudinal direction of the film 2, that is, in the direction of the arrow 2 a, the position of the corresponding cutting element 5 can be adjusted by means of the adjusting device 19.
[0033] As can also be seen from the subsequent figures, the adjusting device 19 is used to adjust the contact area with the film 2, in which the cutting element 3 and the corresponding cutting element 5 interact in such a way that The film 2 in between is perforated. Generally, it is also conceivable to provide this type of adjustment device on the cutting roller 7 in order to adjust the cutting member 3 accordingly.
[0034] figure 2 A schematic plan view of the corresponding cutting member 5 of the first embodiment 1 is shown. The line of action 21 is distributed substantially perpendicular to the conveying direction 2a of the film 2, and the line of action passes through the cutting element 3 (in figure 2 (Not shown in)) is defined by the overlap/intersection of the corresponding cutting member 5. In this case, the line of action 21 shown corresponds to the first overlap/intersection of the cutting member 3 and the corresponding cutting member 5 in the first relative positioning of the corresponding cutting member 5 with respect to the cutting member 3, and is dashed The indicated line of action 21 ′ corresponds to the second overlap/intersection of the cutting element 3 and the corresponding cutting element 5 in the second relative positioning of the corresponding cutting element 5 with respect to the cutting element 3. The adjustment area and adjustment direction between the first relative positioning and the second relative positioning are indicated by a double arrow 21a.
[0035] In this case, it is not important for the principle of action whether the position of the cutting member 3 is changed or reversed with respect to the corresponding cutting member 5, or whether the corresponding cutting member 5 is replaced with a corresponding cutting member of another model. It is decisive that the corresponding cut piece 5 has a three-dimensional model 23, which is figure 2 In the example of, it is composed of a plurality of raised contact surfaces 23a and a plurality of non-contact regions 23b that are sunk relative thereto. In addition, as by figure 2 It can be seen that the model 23 preferably includes a plurality of contact surfaces 23a and a plurality of non-contact regions 23b connected in series periodically.
[0036] The model 23 corresponding to the cutting element 5 and the cutting element 3 cooperate along the line of action 21 in such a way that the film 2 is perforated in the perforated area 25 and substantially not perforated in the non-perforated area 27. figure 2 In addition, the length ratio between the contact surface 23a and the non-contact area 23b determines the ratio between the length of the perforated area 25 and the length of the non-perforated area 27 along the line of action 21. It can also be seen that the movement of the line of action 21 along or against the transport direction 2a of the film 2 plays a role in changing the perforation ratio. This is caused by figure 2 The action line 21' that moves upward in the warp direction, has a shorter perforated area 25', and has a longer non-perforated area 27', is indicated.
[0037] image 3 In the cross section along the line of action 21, the cutting element 3 and figure 2 The corresponding cutting piece shown in 5. In the following manner, that is, a raised area 5b and a perforated groove 5c are provided on the corresponding cutting strip 5, and the corresponding cutting strip 5 can be implemented in a simple manner with the corresponding contact surface 23a and the non-contact area 23b. Model 23. Such a corresponding cutting member 5 can be manufactured on the corresponding cutting roller 9 by engraving (especially by laser engraving) or on a replaceable corresponding cutting strip, for example.
[0038] Such as image 3 The cutting element 3 can therefore be constructed continuously, especially linearly, as shown in. This is advantageous for the replacement of the cutting member 3 caused by wear or damage. The cutting member 3 may be a standardized kit for cutting and/or perforating labels and the like. The cutting member 3 may be provided as a replaceable tool cutting member or blade, for example.
[0039] Through regulation figure 1 The rotation angles α and β of the cutting member 3 and the corresponding cutting member 5 shown in FIG. Additionally or alternatively, the relative positioning 5a of the corresponding cutting member 5 on the periphery of the corresponding cutting roller 9 can be adjusted. The latter is advantageous in the case when the synchronized rotational movement of the cutting roller 7 and the corresponding cutting roller 9 should be maintained unchanged and independent of the position of the line of action 21.
[0040] In order to adjust the rotation positions α, β of the cutting member 3 and the corresponding cutting member 5 relative to each other, the rotation speed of the cutting roller 7 or the rotation speed of the corresponding cutting roller 9 can be temporarily changed until the line of action 21 is adjusted to a desired value. After that, the cutting roller 7 and the corresponding cutting roller 9 resynchronize with the rotation positions α and β.
[0041] Figure 4 Shows a grid-shaped corresponding cutting member 31 in an alternative embodiment of the present invention with a three-dimensional model 33. The model includes a contact surface 33a for interacting with the cutting member 3 and a non-contact area 33b. The non-contact area is composed of The intermediate space between the contact surfaces 33a is defined. Such corresponding cutting member 31 can be constructed by a support, a bow or the like including any three-dimensional structure. It is also conceivable, for example, to have a spiral structure. In this case, contact surfaces 33a are arranged in a cyclically repeated model in an advantageous manner, and these contact surfaces have a width that varies in the transport direction 2a of the film 2 and/or in the adjustment direction 21a of the line of action 21 . In this way, in principle, the same advantages, especially the adjustment possibilities, can be obtained as with the first embodiment. The corresponding cutting pieces 5 and 31 can obviously be bent in leaning against the periphery of the corresponding cutting roller 9.
[0042] It is decisive for the device according to the invention and the method according to the invention that the corresponding cutting parts 5, 31 have three-dimensional models 23, 33 with contact surfaces 23a, 33a, which are shared with the film 2 and with the cutting part 3. The effect is so that a perforation in the film 2 is generated by the cutting element 3 and the corresponding cutting element 5 in the contact area of the film 2. In this case, the corresponding cutting piece 5 having only slight wear compared to the cutting piece 3 may be constructed in various ways. Compared with the prior art, the cutting element 3 can be simplified in structure accordingly, so that the replacement of the cutting element 3 caused by wear can be performed simply and at low cost.
[0043] The ratio of perforation to non-perforation of the film 2 can then be caused by a simple displacement of the line of action 21 with respect to the corresponding cutting elements 5, 31. Especially in the case of using the cutting roller 7 and the corresponding cutting roller 9 corresponding to each other, this can be achieved in a simple manner by manipulating the drive motors 11 and 13.
[0044] Furthermore, the perforation can always be adapted to the changed production conditions, for example to the tensile stress in the subsequent separation of the individual perforated sections of the film 2. For example, both the perforation and the tensile stress can be adapted to the material properties and/or thickness of the film 2.
[0045] In the operation of the apparatus according to the invention, the film 2 or film tube is preferably continuously conveyed and guided through between the rotating cutting roller 7 and the corresponding cutting roller 9. The rotation positions α and β of the cutting roller and the corresponding cutting roller are always synchronized, and adapted by temporary rotation speed adaptation when needed. Likewise, the peripheral positioning of the cutting element 3 or the corresponding cutting element 5 on the respective rollers 7, 9 can be adjusted again. By pushing the line of action 21, the lateral perforation of the film 2 can be adjusted during a running production operation and adapted to real-time production conditions when needed.
[0046] The described embodiments and variants can be combined arbitrarily in a technically meaningful way.
