Method and system for treating a foil element conveyed in the direction of conveying

Abstract

Method for treating a film element (3) conveyed in the conveying direction (2), in which the film element (3) is stretched longitudinally and / or transversely in and / or perpendicular to the conveying direction (2) as a utility (10), in which the film element (3) is transferred at a differential section (20) from a first conveying device (5) with a first conveying speed (v1) to a second conveying device (6) with a second conveying speed (v2), and in which the conveying speeds (v1, v2) are adjusted relative to each other in order to effect a change in length of the film element (3) by a difference (Δx) of the conveying speeds (v1, v2), characterized in that at least a difference (Δx) is set within the utility (10) in order to produce differently stretched sections or at least one stretched section (21, 22) and one unstretched section (23) within the utility (10).

Description

[0001] The invention relates to a method for treating a film element conveyed in the conveying direction, in which the film element is stretched longitudinally and / or transversely in / or transversely to the conveying direction as a blank, in which the film element is transferred at a differentiating section from a first conveying device with a first conveying speed to a second conveying device with a second conveying speed, and in which the conveying speeds are adjusted relative to one another in order to effect a change in the length of the film element by a difference in the conveying speeds.

[0002] The invention further relates to a method for treating a film element conveyed in the conveying direction, in which the film element is stretched longitudinally and / or transversely in and / or transversely to the conveying direction as a blank, in which the film element is transferred at a differentiating section from a first conveying device with a first conveying speed to a second conveying device with a second conveying speed, and in which the second conveying device widens edges of the film element along the conveying direction or allows them to run parallel, wherein the angulation is adjusted so that an angulation difference and thus a transverse stretching results.

[0003] The invention further relates to a system for treating a film element conveyed in the conveying direction, comprising a first conveying device and a second conveying device, in which the two conveying devices are arranged one behind the other in the conveying direction, in which a differentiating section is arranged between the two conveying devices, at which the film element is transferred from the first conveying device to the second conveying device, wherein the two conveying devices can be operated at different conveying speeds in order to effect a change in the length of the film element by means of a difference in the conveying speeds.

[0004] Generic processes and related systems are already known from the state of the art.

[0005] For example, published patent application DE 101 13 524 A1 describes a method and apparatus for film stretching. The method taught therein is characterized in particular by heating a provided film web, which is then stretched in the conveying direction and transversely to the conveying direction in order to completely smooth out the film web, which may have become bulged due to the heating.

[0006] From the published patent application DE 10 2006 048 296 A1, a device for thermoforming plastic films, in particular for laminating molded bodies with a laminating film, is also known, wherein the plastic film is drawn into a thermoforming device by means of conveyor belts of a conveyor device and is clamped there between clamping bars of an upper and a lower clamping frame and is then deformed or molded onto the molded body by means of molding tools, wherein the conveyor belts are divided in the direction of movement into a first partial area and a second partial area and wherein the conveyor belts in the second partial area are driven faster than the conveyor belts in the first partial area.

[0007] Furthermore, German Patent Application DE 28 00 299 A1 discloses a hot-forming system for articles made of plastic film, particularly by deep-drawing. This system uses a heating device under which the strip is guided. A guide device is attached to the edges, with which the divergence between them is adjusted or controlled as a result of the temperature increase. The tensile forces that occur in the film under fluctuating working conditions can thus be controlled and reduced. The strip enters the deep-drawing machine flat and without wrinkles.

[0008] The invention is based on the object of further developing specific generic methods in order to be able to save film material in particular.

[0009] The object underlying the invention is achieved by a method for treating a film element conveyed in the conveying direction, in which the film element is stretched longitudinally and / or transversely in / or transversely to the conveying direction as a blank, in which the film element is transferred at a differentiating section from a first conveyor device with a first conveying speed to a second conveyor device with a second conveying speed, and in which the conveying speeds are adjusted relative to one another in order to effect a change in the length of the film element by means of a difference in the conveying speeds, the method being characterized in that at least one difference is set within the blank in order to produce differently stretched sections or at least one stretched section and one unstretched section within the blank.

[0010] By means of this proposed process variant, the blank can be individually adapted to a tool and / or component geometry, in particular with regard to its film thickness, whereby the quality of the component provided with the film element can be significantly improved.

[0011] In other words, the panel can be made thicker or thinner in sections, depending on how a tool or component is shaped.

[0012] Differences in conveying speeds, conveying speed differences, within the panel can be both controlled and regulated, depending on how a system is designed to carry out the present method, wherein, in the sense of the invention, the terms “controlled” and “regulated” are treated synonymously.

[0013] In particular, by using differently stretched or compressed sections within the panel, a saving of film material of up to 15%, but at least up to 8%, can be achieved, which can also significantly reduce production costs.

[0014] Depending on the tool or component geometry, the effect of saving film material varies.

[0015] The conveyor speeds can be adjusted almost arbitrarily. However, the second conveyor speed is preferably adjusted relative to the first conveyor speed, as this is the simplest to achieve, particularly from a process engineering perspective.

[0016] The term "treatment" describes any process by which the film element is treated. In addition to, for example, heating the film element, this specifically includes longitudinal or transverse stretching and / or longitudinal or transverse compression of the film element, with the longitudinal stretching or longitudinal compression occurring in the conveying direction of the film element and the transverse stretching or transverse compression occurring transversely to this conveying direction.

[0017] In particular, this “treatment” of the film element conveyed in the conveying direction refers to the provision of a semi-finished product, here referred to briefly as a panel, for the production of an automotive interior trim part, but also in particular for the lamination of any carrier part or specifically a carrier part from the automotive sector for subsequent further processing.

[0018] In the context of the invention, the term “film element” describes any films, film webs or film pieces, which can be provided in an endless or pre-assembled form.

[0019] In other words, the film element in this case can be, in particular, a continuous ("endless") film web provided from a roll. Alternatively, the film element can consist of a desired cut, which can then be provided in larger quantities. However, the film element can also be a film web formed by joined cuts, such as welded, sewn, or glued cuts.

[0020] It is therefore clear that a large number of differently formulated film elements can be used in accordance with the invention.

[0021] The term “use” in the sense of the invention defines a wide variety of semi-finished products which are made from the film element, in particular for further processing.

[0022] The blank is preferably conveyed according to a shot or cyclic film feed in the machine direction, i.e. in the conveying direction, by an appropriately designed system.

[0023] The term "differentiation section" in this case describes an area of ​​a correspondingly designed system in or at which the film element or panel is transferred from the first conveyor to the second conveyor. It does not matter whether the two conveyors are spatially separated or at least partially overlapping.

[0024] The change in length within the panel caused by a difference between the two conveying speeds essentially causes a change in the strength or thickness of the film element or panel, wherein the present method is characterized in that stretched or compressed sections can be created within the panel by setting a difference in the conveying speeds while the panel in question is transferred from the first conveying device to the second conveying device at the differentiating section.

[0025] In this respect, a change in the length of the film element is preferably effected in the region of the differentiation section.

[0026] The object of the invention is also achieved by a method for treating a film element conveyed in the conveying direction, in which the film element is stretched longitudinally and / or transversely in and / or transversely to the conveying direction as a blank, in which the film element is transferred at a differentiating section from a first conveying device with a first conveying speed to a second conveying device with a second conveying speed, and in which the second conveying device widens edges of the film element along the conveying direction or allows them to run parallel, here collectively referred to as "angling", wherein the angulation is adjusted so that an angulation difference, referred to as "difference" for short, results, and thereby a transverse stretching, wherein this method variant is characterized in that at least one difference is set within the blank,to produce different sections within the panel with different transverse stretches, or with and without transverse stretches.

[0027] In this way, the blank can also be treated in an application-specific manner transversely to the conveying direction in accordance with the invention in order to be more optimally adapted to a tool and / or component geometry.

[0028] A widening or a parallel running of edges of the film element along the conveying direction is referred to in the sense of the invention as angling.

[0029] It is understood that in this case, several equally stretched and / or compressed sections can also be produced within the panel.

[0030] Another process variant involves controlling or adjusting different differences within the panel. This allows different stretching and / or compression effects to be achieved on the panel or film element.

[0031] In this respect, it is possible that sections within the panel are stretched and / or compressed differently.

[0032] Thus, within the panel, a wide variety of sections with different longitudinal stretching and / or longitudinal compression can be produced.

[0033] The term “within the utility” describes, in the sense of the invention, the physical extent of the utility, which is formulated by the edges that delimit the utility.

[0034] In this context, it is advantageous if the panel is partially stretched and / or compressed within its limits, allowing thickness changes to be incorporated within the panel's limits. Such a process is not yet known.

[0035] In the sense of the invention, the limits of the benefit are defined by the edges of the benefit.

[0036] It is particularly advantageous if the difference is adjusted while the blank is running along the differentiating section and / or while the blank is running into the second conveyor device, since in this case the desired effects on the blank can be achieved particularly easily in terms of process and device technology by means of different conveying speeds of the conveyor devices connected in series.

[0037] For example, during a feed movement of the film element in the conveying direction, the speed of the second conveying device in particular is specifically adjusted.

[0038] Alternatively, the speed of the first conveyor can be adjusted, or the speeds of both conveyors can be manipulated simultaneously or sequentially in order to achieve the desired effects with regard to different stretching or compression within the panel.

[0039] Specifically, a targeted longitudinal stretching or compression of the blank can be carried out, for example, based on an empirically determined speed profile.

[0040] The differences can also be adjusted by increasing or reducing the speed(s) continuously or in steps.

[0041] The benefit can be particularly specifically tailored to a tool and / or component geometry if the difference is set or adjusted depending on a tool and / or component geometry.

[0042] For example, the panel is stretched at its incoming beginning and at its outgoing end, seen in the conveying direction, but not in between, if, for example, a tool or a component to be laminated with the panel is more raised in its middle than its beginning or end area.

[0043] Because the difference can be set or adjusted depending on the tool and / or component geometry, different longitudinal stretching or longitudinal compression in certain areas of the tool or component can be increased, reduced or completely eliminated within the panel.

[0044] Thus, in the case of a tool or component which has higher flanks in its middle, the beginning and / or the end of the blank can be stretched, whereby the middle part of this blank is not stretched or is stretched only slightly or negligibly.

[0045] This allows at least 8% of film material to be saved, particularly for complex contours.

[0046] This is of particular advantage since, in addition to other criteria, increasing attention is being paid to the consumption of film material, so that the film material savings achieved here appear particularly interesting.

[0047] In this respect, significant economic advantages can be achieved, particularly with regard to complex tool and / or component contours.

[0048] Partial stretching or compression of the panel is not known according to the current state of the art. Rather, a film element is only stretched over the entire length of the panel, even if a tool or component has significant height differences in its profile along its length.

[0049] In this respect, it is particularly useful if the difference is set or adjusted depending on a height profile of the tool and / or component geometry.

[0050] It is equally advantageous if the difference can be adjusted or adjusted depending on the length and / or width of the tool and / or component geometry. This allows the panel to be stretched or compressed even more individually in sections.

[0051] If a section within the panel is not stretched or is stretched to a negligible extent, and at least one immediately adjacent section is stretched by more than 5% or by more than 10%, preferably by more than 20%, not only can an optimized adaptation to a tool or component geometry but also significant material savings can be achieved.

[0052] It is understood that the immediately adjacent section to be stretched can be determined differently.

[0053] The area of ​​this immediately adjacent section to be stretched can be determined and thus limited with extreme precision if this immediately adjacent section is determined as a function of a tool and / or component geometry.

[0054] With regard to a further preferred method variant, it is advantageous if a first section of the panel is compressed between 1% and 10% relative to another section of the panel. This allows the required or desired film thickness to be adjusted even more precisely to a correspondingly profiled tool and / or component area.

[0055] These sections can also be determined as desired, whereby the dimensions of these sections can be determined particularly precisely if this first section is determined as a function of a tool and / or component geometry.

[0056] For example, at least one difference is set cumulatively or alternatively within the panel in such a way that differently compressed sections or at least one compressed section and one uncompressed section can be generated within the panel.

[0057] Furthermore, it is advantageous if sections within the panel are partially stretched and / or compressed, in particular stretched and / or compressed differently, whereby the present methods can be optimally adapted to most tool and / or component geometries.

[0058] In general, it is particularly advantageous to create different thicknesses of the foil element within the panel. As already described, this allows the panel to be more optimally adapted to the profile of a tool and / or component geometry, ensuring a significantly more uniform foil material thickness across the entire surface of the component after the panel or foil element is attached to the component.

[0059] The object of the invention is also achieved by a system for treating a film element conveyed in the conveying direction, having a first conveying device and a second conveying device, in which the two conveying devices are arranged one behind the other in the conveying direction, in which a differentiating section is arranged between the two conveying devices, at which section the film element is transferred from the first conveying device to the second conveying device, wherein the two conveying devices can be operated at different conveying speeds in order to effect a change in the length of the film element by means of a difference in the conveying speeds, wherein the system is distinguished by a stretching and / or compressing device which produces sections within the blank in order to produce differently stretched sections or at least one stretched section and one unstretched section within the blank.

[0060] By means of a correspondingly designed device for producing stretched and / or compressed sections within the panel, it is advantageously possible to provide a panel, which is to be formed by an individually shaped tool or laminated onto an individually shaped component, with an extremely uniform film thickness.

[0061] The stretching and / or compression within the panel carried out within the meaning of the invention takes place, for example, within the scope of a pretreatment with regard to further processing of the panel, in particular with regard to laminating a carrier part with a film element or a film, and above all with regard to producing an automotive interior trim part.

[0062] It is understood that this device for producing stretched and / or compressed sections within the panel can be configured in a variety of ways on the system. In any case, it can be implemented as hardware or software. It is preferably implemented as a combination of suitable hardware and software.

[0063] A preferred embodiment provides that the device comprises means for controlling or regulating differences within the panel in order to produce, in particular, stretched and / or compressed as well as unstretched and / or uncompressed sections within the panel.

[0064] In order to be able to determine particularly precisely a section within the panel that is to be stretched or compressed, it is advantageous if the device comprises suitably designed means for determining a relevant section.

[0065] With regard to a further advantageous embodiment, the device comprises means for determining the at least one section to be stretched or compressed within the blank as a function of a tool and / or component geometry.

[0066] These means for determining the at least one section within the blank to be stretched or compressed can be of a very different nature. For example, they comprise a scanning device, such as an optical scanner, for scanning a tool and / or component geometry or the like.

[0067] Alternatively, but also cumulatively, these means can also be suitable for reading out data records relating to a tool and / or component on which the film element or panel is used.

[0068] A combination of suitably designed hardware and software is preferred.

[0069] Furthermore, it is advantageous if the device comprises means for marking a relevant section, for example, to precisely define the section on the blank. For example, an input device, such as a touch-sensitive screen or the like, is provided for this purpose, by means of which a section to be stretched or compressed can be defined on the blank.

[0070] Preferably, the device comprises means for marking the at least one section to be stretched or compressed within the blank as a function of a tool and / or component geometry.

[0071] The section can be defined particularly easily, particularly depending on a tool and / or component geometry, by means of appropriately designed software which can preferably access existing data sets relating to the tool and / or component geometry.

[0072] It can also be advantageous for the marking means to be provided by a combination of hardware and software.

[0073] For example, with the present device for producing stretched and / or compressed sections, a section-by-section longitudinal division of the panel is achieved, in which the panel, for example, experiences no stretching on a length section of 20 cm (first section), a 10% stretching on a subsequent length section from 20 cm to 180 cm (second section) and a 20% stretching on a final length section from 180 cm to 200 cm (third section).

[0074] A compressed section can also be provided, in which case the compression is preferably less than 10%.

[0075] Advantageously, thinner film sections can be created within a panel by partially stretching the film element, namely where tools for further processing the panel and / or components to be laminated with the panel are essentially flat, i.e., have no significant elevations or depressions. This can save a significant amount of film material.

[0076] In sections within the panel where more film material is required, namely in areas of tools and / or components with elevations or depressions, the stretching of the film element can be omitted, or a designated section of the panel can even be partially compressed in order to achieve an accumulation of material.

[0077] The terms “stretching” and “drawing” are used synonymously in the context of the invention, whereby the processes described here can be carried out in particular in pretreatment for further processing of the panel.

[0078] Further features, effects and advantages of the present invention are explained with reference to the attached drawing and the following description, in which an installation for stretching and / or compressing a film element is shown and described by way of example.

[0079] The drawing shows: Fig. 1 schematically shows a perspective view of a system for treating a film element conveyed in the conveying direction, comprising a first conveying device, a second conveying device and a device for producing stretched and / or compressed sections within the blank in order to produce different sections with longitudinal stretching and / or longitudinal compression within the blank; Fig. 2 schematically shows a plan view of three prefabricated panels made of film elements, each with two sections to be partially stretched and marked accordingly; and Fig. 3 schematically shows a perspective detailed view of the Fig. 1 shown system in the area of ​​the second conveyor device with an exemplary tool for further processing of the partially stretched blank.

[0080] The Fig. 1 schematically shown system for treating a film element 3 conveyed in the conveying direction 2 or machine direction has a frame 4 which carries a first conveying device 5 and a second conveying device 6.

[0081] The two conveyor devices 5 and 6 form a conveyor line 7 within the system 1 or the frame 4, along which the film element 3 is conveyed through the system 1 according to the conveying direction 2, wherein the film element 3 is already prefabricated into individual panels 10 (see also Fig. 2 and Fig. 3).

[0082] The individual prefabricated panels 10 are semi-finished products which are further processed or specifically formed on tools 11 of the system 1, or can be cumulatively or alternatively laminated onto components (not shown here).

[0083] The respective benefit 10 is limited by its edges 12 and has a longitudinal extension 13 and a width extension 14 (see only Fig. 2).

[0084] Above the first conveyor 5, a heating device 15 is located in the frame 4 of the system 1, by means of which the prefabricated blanks 10 can be heated. The heating device 15 is located in an input-side part 16 of the system 1, in which the individual blanks 10 enter the system 1 with the first conveyor 5 in cycles or in batches according to a predetermined feed length.

[0085] Downstream of the conveying direction 2 behind the input-side part 16 of the system 1, i.e. in the area of ​​the second conveyor device 6, there is a forming device 19 of the system 1. By means of this forming device 19, the respective tools 11 are moved relative to the conveyor line 7 and thus also relative to the respective blank 10, so that the blank 10 located at the level of the forming device 19 can be formed or deep-drawn with the aid of the tools 11.

[0086] Alternatively, the panel 10 can also be attached to a component (not shown), in particular laminated onto a component (not shown), provided that the system 1 is set up accordingly.

[0087] The two conveyor devices 5 and 6 are arranged one behind the other along the conveyor line 7 in such a way that a differentiating line 20 is formed between them.

[0088] The differentiating section 20 is provided, at least in this exemplary embodiment, to produce at least one stretched section 21, 22 and / or at least one compressed section (not shown here) within the respective blank 10. For this purpose, the two conveyor devices 5 and 6 can be operated at different conveying speeds v1 and v2, respectively.

[0089] In a specific method case, this could be such that the blank 10 is transferred by the first conveyor device at a first conveyor speed v1 to the second conveyor device 6, while the second conveyor device 6 is operated at least temporarily at a second conveyor speed v2, wherein the second conveyor speed v2 is greater than the first conveyor speed v1.

[0090] Thus, between the first conveying speed v1 and the second conveying speed v2 there is a difference Δx that can be set almost as desired.

[0091] It is understood that the different sections 21, 22 and 23 only arise at or behind the differentiating section 20, i.e. from the second conveyor device 6, as shown in the illustration according to the Fig. 3. Regarding the representations according to the Fig. 1 and Fig. 2, these sections 21, 22 and 23 to be generated are already marked with regard to their boundaries before the differentiation section 20, so that it is clear where these sections 21, 22 and 23 are located after the treatment of the respective benefit 10.

[0092] This achieves the effect that the respective blank 10, which is transferred from the first conveyor device 5 to the second conveyor device 6, is stretched on the differentiating section 20, whereby the blank 10 has a lower film thickness (not separately numbered here) in these stretched sections 21 and 22 than in the intermediate unstretched section 23.

[0093] In particular, according to the representations according to the Fig. 2 and Fig. 3 it can be clearly seen that the unstretched section 23 is arranged congruently with raised contours 24 of the tool 11, so that more film material is available at these raised contours 24 of the tool 11 for deep drawing than in the front stretched section 21 and the rear stretched section 22, which are in overlap with rather flatter areas 26 and 27 of the tool 11 for deep drawing.

[0094] If necessary, the panel can be compressed cumulatively or alternatively partially into a section not shown here in order to specifically create a partial accumulation of material within the panel 10. For this purpose, the second conveying speed V2 would be set at least temporarily lower than the first conveying speed V1, whereby any section (not shown here) within the panel 10 would be compressed at the differentiating section 20.

[0095] In any case, the blank 10 thus brought into overlap with the tool 11 has a change in length 30 and 31 in the front stretched section 21 as well as in the rear stretched section 22 (see Fig. 2), whereby the middle unstretched section 23 has experienced no or, if at all, only a negligible change in length.

[0096] It is understood that sections 21 and 22 can also be stretched to different intensities, depending on how the difference Δx is set or manipulated.

[0097] In order to be able to produce or create different sections 21, 22 and 23 within the panel 10, wherein within the individual panel 10 stretched sections 21 and 22 are directly adjacent to an unstretched section 23, the system 1 has a stretching and / or compressing device 35 which produces sections 21, 22, 23 within the panel 10, by means of which it is possible to produce stretched or compressed as well as unstretched or unstruck sections 21, 22, 23 within the panel 10. In this case, stretched and unstretched or compressed and unstruck sections 21, 22, 23 are arranged directly adjacent to one another within the panel 10.

[0098] It is understood that this stretching and / or compressing device 35 producing sections 21, 22, 23 within the blank 10 can be designed in a variety of ways, as long as it is ensured on the system 1 that an individual blank 10 can be partially stretched or compressed in accordance with the invention.

[0099] At least in this embodiment, the device 35 comprises means (not explicitly shown) for controlling or regulating different differences Δx within the blank 10, so that stretched and / or compressed as well as unstretched and / or uncompressed sections 21, 22 and 23 are produced within this blank 10.

[0100] These means for controlling or regulating different differences Δx can be designed either as hardware or as software.

[0101] In this embodiment, hardware and software components are combined to embody the means for controlling or regulating different differences Δx, advantageously in particular by means of correspondingly designed software-controlled drives of the two conveyor devices 5 and 6.

[0102] Furthermore, in the present exemplary embodiment, the means for controlling or regulating different differences Δx are suitable for determining the areal extent of the respective blank and, on the basis of data determined in this regard, for manipulating the conveying speeds v1 and v2 of the two conveying devices 5 and 6 in such a way that at least one stretched section 21 or 22 and / or at least one compressed section (not shown here) can be produced within this areal extent of the respective blank 10.

[0103] Furthermore, the present device 35 also comprises means (not explicitly shown) for determining the at least one section 21 or 22 to be stretched or compressed within the blank 10, depending on a tool and / or component geometry. For this purpose, the means for determining the at least one section 21 or 22 to be stretched or compressed within the blank 10, in this exemplary embodiment, comprise at least one data processing device (not shown) for processing CAD data or the like from tools 11.

[0104] Furthermore, the present device 35 is characterized by means (not explicitly shown) for marking the at least one section 21 or 22 to be stretched or compressed within the blank 10 depending on a tool and / or component geometry.

[0105] The marking means comprise, on the one hand, a touchscreen (not shown) and, on the other hand, a data processing device (not shown) for processing CAD data or the like of the panel 10.

[0106] At this point, it should be explicitly pointed out that the features of the solutions described above or in the claims and / or in the figures can also be combined if necessary in order to be able to implement or achieve the explained features, effects and advantages accordingly in a cumulative manner.

[0107] It is understood that the exemplary embodiment explained above is merely a first embodiment of the method and system according to the invention. Therefore, the embodiment of the invention is not limited to this exemplary embodiment.

[0108] All features disclosed in the application documents are claimed as essential to the invention, provided that they are new, individually or in combination, compared to the prior art. List of reference symbols used 1 system 2 Conveyor direction or machine direction 3 slide element 4 frame 5 first funding facility 6 second conveyor 7 Conveyor line 10 Benefits 11 tools 12 edges 13 Longitudinal extension 14 Width 15 Heating device 16 entrance side part 19 Forming device 20 Differentiation section 21 front stretched section 22 rear stretched section 23 unstretched section 24 raised contours 26 front flatter area 27 rear flatter area 30 front length change 31 rear length change 35 Stretching and / compression device v1 first conveyor speed v2 second conveyor speed Δx Difference in conveyor speeds

Claims

[1] Method for treating a film element (3) conveyed in the conveying direction (2), in which the film element (3) is stretched longitudinally and / or transversely in and / or transversely to the conveying direction (2) as a blank (10), in which the film element (3) is transferred at a differentiating section (20) from a first conveying device (5) with a first conveying speed (v1) to a second conveying device (6) with a second conveying speed (v2), and in which the conveying speeds (v1, v2) are adjusted relative to one another in order to effect a change in the length of the film element (3) by a difference (Δx) between the conveying speeds (v1, v2), characterized by that at least one difference (Δx) is set within the panel (10) in order to produce differently stretched sections or at least one stretched section (21, 22) and one unstretched section (23) within the panel (10). [2] Method for treating a film element (3) conveyed in the conveying direction (2), in which the film element (3) is stretched longitudinally and / or transversely in and / or transversely to the conveying direction (2) as a blank (10), in which the film element (3) is transferred at a differentiating section (20) from a first conveying device (5) with a first conveying speed (v1) to a second conveying device (6) with a second conveying speed (v2), and in which the second conveying device (6) widens edges of the film element (3) along the conveying direction (2) or allows them to run parallel, wherein the angulation is adjusted so that an angulation difference and thereby a transverse stretching results, characterized by that at least one difference (Δx) is set within the panel (10) in order to produce different sections with different transverse stretchings, or with and without transverse stretchings, within the panel (10). [3] Method according to claim 1 or 2, characterized by that different differences (Δx) are controlled or regulated within the benefit (10). [4] Method according to one of claims 1 to 3, characterized by that the difference (Δx) is adjusted while the blank (10) runs along the differentiating section (20) and / or while the blank (10) runs into the second conveyor device (6). [5] Method according to one of claims 1 to 4, characterized by that the difference (Δx) is set or adjusted depending on a tool and / or component geometry. [6] Method according to one of claims 1 to 5, characterized by that the difference (Δx) is set or adjusted depending on a height profile of the tool and / or component geometry. [7] Method according to one of claims 1 to 6, characterized bythat the difference (Δx) is set or adjusted depending on a length and / or a width of the tool and / or component geometry. [8] Method according to one of claims 1 to 7, characterized by that within the panel (10) different sections (21, 22, 23) are produced with and without longitudinal stretching and / or longitudinal compression. [9] Method according to one of claims 1 to 8, characterized by that within the panel (10) a section (23) is not stretched or is stretched to a negligible extent, and at least one section (21, 22) immediately adjacent thereto is stretched by more than 5% or by more than 10%, preferably by more than 20%. [10] Method according to claim 9, characterized by that this immediately adjacent section (21, 22) is determined as a function of a tool and / or component geometry. [11] Method according to one of claims 1 to 10, characterized bythat within the panel (10) a first section of the panel (10) is compressed between 1% and 10% compared to another section of the panel (10). [12] Method according to claim 11, characterized by that this first section is determined depending on a tool and / or component geometry. [13] Method according to one of claims 1 to 12, characterized by that different thicknesses of the film element (3) are produced within the panel (10). [14] Method according to one of claims 1 to 13, characterized by that within the panel (10) partial sections (21, 22, 23) are stretched and / or compressed differently. [15] Plant (1) for treating a film element (3) conveyed in the conveying direction (2), comprising a first conveying device (5) and a second conveying device (6), in which the two conveying devices (5, 6) are arranged one behind the other in the conveying direction (2), in which a differentiating section (20) is arranged between the two conveying devices (5, 6), at which the film element (3) is transferred from the first conveying device (2) to the second conveying device (6), wherein the two conveying devices (5, 6) are operable at different conveying speeds (v1, v2) in order to effect a change in the length of the film element (3) by means of a difference (Δx) between the conveying speeds (v1, v2), in particular for carrying out a method according to one of claims 1 to 14, characterized bya stretching and / or compression device (35) producing sections (21, 22, 23) within the blank (10) in order to produce differently stretched sections or at least one stretched section (21, 22) and one unstretched section (23) within the blank (10). [16] Annex (1) according to claim 15, characterized by that the device (35) comprises means for controlling or regulating differences (Δx) within the panel (10). [17] Annex (1) according to claim 15 or 16, characterized by that the device (35) comprises means for determining the at least one section to be stretched or compressed within the blank (10) as a function of a tool and / or component geometry. [18] Plant (1) according to one of claims 15 to 17, characterized bythat the device (35) comprises means for marking the at least one section to be stretched or compressed within the blank (10) as a function of a tool and / or component geometry.

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