EP4263200A1

EP4263200A1 - Separating device and method for regionally separating a film web

Info

Publication number: EP4263200A1
Application number: EP21819772.1A
Authority: EP
Inventors: Ralf-Hendrik Born; Gerald GLAAS; Rene Kostewa; Uwe Schweizer
Original assignee: Schobertechnologies GmbH
Current assignee: Schobertechnologies GmbH
Priority date: 2020-12-17
Filing date: 2021-11-23
Publication date: 2023-10-25
Also published as: WO2022128363A1; CA3205565A1; DE102020134021A1; US20240034591A1; DE102020134021B4

Abstract

The invention relates to a separating device (1) for regionally separating a film web (2), having an anvil plate (6) which has a working surface (19) for laying an end region (14) of a film web (2), having a conveying device (7) which is mounted along a conveying axis (17) so as to be linearly movable with respect to the anvil plate (6) and which is designed to carry out a laying movement, oriented parallel to the working surface (19), for the end region (14) of the film web (2), having a separating device (8) which has at least one cutting edge (52, 53) for carrying out a separating operation for an end region (14), held between the cutting edge (52, 53) and the working surface (19), of the film web (14), wherein the conveying device (7) and the separating device (8) are designed to alternately carry out the laying movement and the separating operation for the end region (14) of the film web (2).

Description

Separating device and method for separating a film web in certain areas

The invention relates to a separating device and a method for separating a film web in certain areas.

DE 10 2015 010 251 A1 discloses a method and a device for processing and finishing, in particular punching, cutting, embossing, creasing and sealing an endless web of material with recurring, different format lengths, the device consisting of at least one rotary tool device with which the web of material undergoes processing and consists of web-guiding components and wherein at least one roller of the tool device has a larger circumference than the maximum format length of the web of material to be processed.

The invention is based on the object of creating a separating device which also makes it possible to separate thin and therefore unstable film webs.

This object is achieved with a separating device for separating a film web in certain areas. In this case, the separating device comprises an anvil plate, which has a working surface for laying out an end region of a film web, a conveying device which is mounted so as to be linearly movable relative to the anvil plate along a conveying axis and which is used for carrying out tion of a laying movement aligned parallel to the working surface for the end area of the film web, as well as a separating device which has at least one cutting edge for carrying out a separating process for an end area of the film web received between the cutting edge and the working surface, the conveyor device and the separating device is designed to alternately carry out the delivery movement and the separating process for the end region of the film web.

The task of the conveying device is to lay out a film web, which can be removed from a storage magazine or which can be unwound from a supply roll, on the working surface of the anvil plate in such a way that in a subsequent work step a separating process for an end area of the film web can be carried out with the help of the Separating device can be carried out. It is provided that a front edge of the end region of the film web laid out by the conveying device on the working surface comes to rest at a defined position along the extension of the working surface in the direction of the conveying axis. Provision is particularly preferably made for this position to always be constant for a given separating device.

For example, it is provided that a length of the film web can be in a range from several meters to several 100 meters, while a width of the film web is in a range between a few centimeters and several decimetres, and that a thickness of the film web is in a range of fractions of a millimeters up to several millimeters. The foil web can optionally be made of a single material, in particular a plastic material, or as a multi-layer arrangement of foils, which in particular consist of different materials such as plastic or metal can be made.

By alternately carrying out the delivery movement and the separating process for the end area of the film web, such as those carried out by the conveyor device and the separating device, the film web completes a step-by-step movement along the conveyor axis, which means that cut sections of the film web are picked up when the film web is stationary can, which is particularly advantageous for the handling of thin films.

In principle, it is provided that the anvil plate is stationarily accommodated on a machine frame and a relative movement of the conveying device and the separating device is undertaken with respect to the anvil plate in order to carry out the conveying process and the separating process.

In an alternative embodiment, it is provided that the conveyor and the separating device are stationary on the machine frame and that the anvil plate performs a linear, intermittent and cyclically recurring relative movement parallel to the conveyor axis with respect to the conveyor and the separating device. In this case, it can be provided in particular that a storage magazine assigned to the anvil plate for a sheet-like fabricated film web or a supply roll assigned to the anvil plate with a film web wound on it is moved with the anvil plate.

In any case, it can be provided that the conveying device and/or the separating device has at least one further degree of freedom in addition to a linear relative movement along the conveying axis with respect to the anvil plate Movement, for example a rotary degree of freedom of movement or a linear degree of freedom of movement aligned transversely to the conveying axis.

Advantageous developments of the invention are the subject matter of the dependent claims.

It is expedient if, in a first conveying position, the conveying device assumes a first, minimum distance from a front edge of the anvil plate aligned transversely to the conveying axis and, in a second conveying position, a second, maximum distance from the front edge, and that the separating device, in a rest position, has a third, occupies the maximum distance from the front edge and, in a working position, occupies a fourth, minimum working distance from the front edge. In this case, the second distance is selected to be greater than the fourth distance, so that an overlapping of a working area of the conveying device and a working area of the separating device is ensured. A difference between the first, minimum distance for the conveyor relative to the front edge of the anvil plate and the second, maximum distance describes the maximum working stroke that the conveyor can perform along the conveyor axis. Depending on the design of the separating device, this maximum working stroke can be used completely or only partially for the movement of the conveying device. A difference between the third, maximum distance for the separating device relative to the front edge of the anvil plate and the fourth, minimum distance describes the maximum working stroke that the separating device can carry out along the conveying axis. The extent to which this maximum working stroke is fully or only partially utilized depends on the design of the at least one cutting edge of the separating device. Because the second distance the conveying device can assume relative to the front edge of the anvil plate is selected to be greater than the fourth distance which the separating device can assume relative to the front edge of the anvil plate, it is ensured that the separating device always has an end region of the film web laid out by the conveying device on the working surface of the anvil plate can edit . Provision is particularly preferably made for the conveying device and the separating device to move synchronously in the same direction along the conveying axis in order to ensure the fastest possible processing of the end region of the film web.

In a further development of the invention, it is provided that the conveyor device has a transport cylinder with a transport cylinder axis aligned transversely to the transport axis and parallel to the working surface, which is designed to carry out the transport process with a linear movement along the transport axis and/or with a rotary movement around the transport cylinder axis is . The task of the transport cylinder is to temporarily pick up the end area of the film web and to exert a tensile force on the film web directed in the direction of the conveying axis in order to pull the film web out of a storage magazine or unroll it from a supply roll. For this purpose, the transport cylinder can be equipped with a clamping device, in particular with a gripper strip or a plurality of grippers, for fixing the end area of the film web. In order to carry out the relative movement for the transport cylinder with respect to the anvil plate, it is provided that the transport cylinder is assigned a drive device which is designed to initiate a linear movement parallel to the conveying axis and to initiate a rotational movement about the transport cylinder axis. Such a drive device can, for example, be an arrangement of a hydraulic be realized likzylinders for the linear movement and a gear train for the rotary movement of the transport cylinder. It is preferably provided that individually controllable drives, in particular electric servo drives, are provided both for the provision of the linear movement and for the provision of the rotary movement of the transport cylinder, which are controlled by a control and regulating device as a function of the desired working stroke and as a function of can be controlled by the desired rotational movement for the transport cylinder.

In a further embodiment of the invention, it is provided that the separating device has a cutting cylinder with a cutting cylinder axis aligned transversely to the conveying axis and parallel to the working surface, which is designed to carry out the separating process with a superimposition of a linear movement along the conveying axis and a rotational movement about the cutting cylinder axis wherein the at least one blade is attached to an outer surface of the cutting cylinder. The task of the cutting cylinder is to either completely separate the end area of the film web from the rest of the film web or to cut sections out of the film web. For this purpose, the cutting cylinder has at least one cutting edge, but can also be provided with a plurality of differently shaped cutting edges in order to be able to cut off complex geometries from the end area of the film web and/or to be able to cut them out from the end area of the film web. In addition or as an alternative, the cutting cylinder can also be equipped with an embossing tool and/or a creasing tool.

For example, it is provided that the cutting cylinder is the only format part of the separating device, that is to say the only component of the separating device that can be used in the event of a change of the component which is to be cut off from the end area of the film web or cut out of the end area of the film web can be exchanged.

In order to keep the cost of adapting the cutting cylinder to a minimum when there is a change in the component, the cutting cylinder can have a dimensionally stable carrier cylinder provided with permanent magnets and/or electromagnets and cutting plates and/or creasing plates and/or embossing plates applied thereto, which enable rapid format changes enable . For this purpose it can be provided in particular that at least one positioning device, in particular in the form of a dowel pin, is provided on the support cylinder in order to ensure exact positioning of the replaceable cutting plates and/or creasing plates and/or embossing plates.

In order to carry out the relative movement for the cutting cylinder with respect to the anvil plate, it is provided that the cutting cylinder is assigned a drive device which is designed to initiate a linear movement parallel to the conveying axis and to initiate a rotational movement about the cutting cylinder axis. Such a drive device can be implemented, for example, as an arrangement of a hydraulic cylinder for the linear movement and a gear train for the rotary movement of the cutting cylinder. Provision is preferably made for individually controllable drives, in particular electric servo drives, to be provided both for providing the linear movement and for providing the rotary movement of the cutting cylinder, which are controlled by a control and regulating device as a function of the desired working stroke and as a function can be controlled by the desired rotational movement for the cutting cylinder. It is preferably provided that the working surface has a flat, in particular rectangular, support area for the end area of the film web and bearing slats adjoining the support area on both sides and extending along the conveying axis and protruding from the support area, and that the cutting cylinder when carrying out the Movement between the rest position and the working position is at least partially with an outer surface on the bearing strips. The bearing slats, each aligned with a longest edge parallel to the conveying axis at the edge of the working surface, are used for a rolling movement of the cutting cylinder during the relative movement of the cutting cylinder with respect to the anvil plate. Due to the geometry of the bearing slats, whose upper sides are parallel to each other and aligned with the first acute angle to the working surface, two-dimensional supports result in interaction with the cone sections that are formed on the outer peripheral surface of the cutting cylinder between cutting cylinder and bearing strips. Provision is preferably made for the extension of the cone sections in the direction of the axis of the cutting cylinder to be greater than the extension of the upper sides of the bearing strips in the direction of the axis of the cutting cylinder. Depending on a lateral positioning of the cutting cylinder in relation to the bearing strips, a distance between the axis of the cutting cylinder and the working surface can thus be adjusted. It is preferably provided that a suspension of the cutting cylinder enables a change in position for the cutting cylinder along the axis of the cutting cylinder in order to enable the resulting adjustment of the distance between the axis of the cutting cylinder and the working surface. The cone sections of the cutting cylinder can also be designed as interchangeable race rings, in order to be able to continue using the cylinder in the event of wear, for example To be able to guarantee the cutting cylinder after replacing the running rings.

In an alternative embodiment it is provided that the bearing slats are designed to be interchangeable and that the cutting cylinder is circular-cylindrical in those areas of its outer peripheral surface that are intended to rest on the top side of the bearing slats. Accordingly, an adjustment of a distance between the axis of the cutting cylinder and the working surface is brought about by exchanging the bearing strips, without having to provide a lateral adjustment option for the cutting cylinder.

It is advantageous if the transport cylinder is assigned a sensor which is designed to detect a front edge of the end region of the film web, in particular in the first conveying position, and/or that the cutting cylinder has a sensor for detecting a position of the cutting edge, in particular in the rest position , is assigned and/or that a sensor for detecting properties of the film web is arranged in the area of the front edge of the anvil plate.

The sensor assigned to the transport cylinder has the task, in conjunction with a suitable evaluation device for evaluating the sensor signal, of enabling a statement to be made as to whether the length of the end region of the film web wound onto the transport cylinder is sufficient. If this is not the case, measures must be taken, in particular by rotating the transport cylinder by the length of the end area of the film web that is wound onto the transport cylinder, before carrying out the delivery movement, which is then carried out by the transport cylinder to correct a given measure . Of the The sensor assigned to the transport cylinder can be arranged in a stationary manner on the machine frame in order to enable the front edge of the end area of the film web to be detected in the first conveying position. Alternatively, it can be provided that the sensor is connected to the transport cylinder in such a way that it is carried along during a linear movement of the transport cylinder.

The sensor assigned to the cutting cylinder, in conjunction with a suitable evaluation device for evaluating the sensor signal, has the task of making it possible to state whether the at least one cutting edge of the cutting cylinder is in the correct position before the cutting process is carried out. If this is not the case, the correct position of the at least one cutting edge can be set, for example, by rotating the cutting cylinder. The sensor assigned to the cutting cylinder can be stationarily arranged on the machine frame in order to detect the position of the at least one cutting edge when the transport cylinder is in the rest position. Alternatively, it can be provided that the sensor is arranged on a drive device for the cutting cylinder and can detect the position of the at least one cutting edge during a relative movement of the cutting cylinder with respect to the anvil plate.

In the area of the front edge of the anvil plate 6 and thus in an area between a storage magazine for a sheet-like fabricated film web or. A sensor can be arranged on a supply roll associated with the anvil plate and having a film web wound thereon and the anvil plate, with which a detection of properties of the film web is carried out. For example, this sensor can be used to detect defects in the film web. It is expedient if at least one orifice opening of a fluid channel is formed on the working surface and/or on an outer surface of the conveying device and/or on an outer surface of the separating device, which is designed to provide a negative pressure or a pressurized fluid . It is advantageous if the working surface is provided, at least in certain areas, with a large number of orifices of the at least one fluid channel, arranged in particular in a matrix with uniform spacing, in order, for example, to ensure reliable adhesion of the end area of the film web after the end area of the film web has been laid out To be able to bring about the film web by subjecting the mouth openings of the fluid channel to negative pressure. The at least one fluid channel is connected to a vacuum supply and/or a fluid source, in particular a compressed air source. By a valve device between the vacuum supply or. the fluid source and the fluid channel is arranged, influence on a negative pressure or. Overpressure can be taken at the respective orifice openings in the working surface. If necessary, it can be provided that in the anvil plate several separately formed fluid channels are provided, each with associated orifice openings, in order to be able to supply different areas of the working surface with vacuum or compressed air in different ways. The orifice openings of the fluid channel can be formed, for example, by bores that are aligned transversely to the working surface of the anvil plate. If necessary, it is provided to realize at least a part of the mouth openings by a porous design of a partial area of the anvil plate or more fluid channels is connected. The advantage of such a configuration of at least a partial area of the anvil plate is that the film web can be sucked in or blown off there, and the end area of the film web can also be separated.

The orifice openings of the at least one fluid channel provided on the outer surface of the conveying device, which can in particular be the transport cylinder or a transport beam that can be adjusted linearly and parallel to the working surface, are used in particular for sucking in the end area of the film web in order to for example to be able to exert tensile forces on the film webs. The at least one fluid channel of the conveying device is connected to a vacuum supply and/or a compressed air source with the interposition of a valve device. For example, it can be provided that the mouth openings of the at least one fluid channel are arranged over at least a partial area of the outer surface, in particular over the entire width of the conveying device, or over the entire outer surface of the conveying device.

The orifice openings of the at least one fluid channel provided on the outer surface of the separating device, which can be a cutting cylinder in particular, are used in particular for sucking in sections or cutouts of the film web during and/or after the separating process has been carried out and This enables, for example, a controlled removal of areas of the film web that have been cut out or waste pieces of the film web that have been cut off. The at least one fluid channel of the separating device is interposed by a valve device with a vacuum supply and/or a Compressed air source connected. In an advantageous further development of the invention, it is provided that the at least one cutting edge of the separating device and the working surface of the anvil plate are used to carry out a separating process for the end area of the film web from the group: cross-cutting of the film web, cutting out film sections from the film web ( Form cutting), crush cutting, lifting punches, shear cutting is formed.

In a further embodiment of the invention, it is provided that the separating device is designed as a lifting punch for carrying out a lifting punch movement aligned transversely to the working surface of the anvil plate and between a rest position at a distance which is greater than an extension of the transport device transversely to the working surface, and a working position with a negligible distance from the working surface is mounted so that it can move linearly with respect to the anvil plate.

It is advantageous if a gripper is arranged on the anvil plate in a relatively movable manner for removing good parts into a defined placement position and/or for removing waste. The task of the gripper is in particular to cut out the good parts or parts from the end area of the film web. transporting away the good parts cut off from the end region of the film web in a manner in which undesired deformation can be avoided even with a very small thickness of the good parts. Furthermore, the gripper is designed to place the good parts in a defined manner, in particular as flatly as possible and with a definable orientation, either on a stack of good parts or to feed them directly to a subsequent processing step for the good parts. In spielhaf t can be provided that several separators are arranged spatially such that the respective Grippers to feed differently configured good parts to a centrally arranged processing device, which can be a film welding device, for example, so that immediate further processing of the good parts provided by the respective separating device can be carried out. A sensor device, in particular a camera with image processing, is preferably assigned to the gripper in order to carry out a quality control for the parts cut out of the film web or cut off from the film web and to be able to qualify them either as good parts or as rejects and to be able to carry out a corresponding gripper movement initiate .

The object of the invention is achieved by a method for regionally separating a film web with the following steps: detecting an end area of a film web, which is laid out on a working surface of an anvil plate, with a transport cylinder, carrying out a first rolling movement for the end area of the Film web onto the transport cylinder during a first linear retraction movement of the transport cylinder, detection of a front edge of the end area of the film web arranged on the transport cylinder with a sensor and control of a second rolling-up movement for the transport cylinder at a first transport position, at which the transport cylinder makes a first, minimal distance from a first end area of the anvil plate, carrying out a combination of a rolling movement and a second linear feed movement for the transport cylinder along the working surface of the anvil plate for depositing the end area of the film n web on the work surface and performing a second linear retraction movement of the transport cylinder into the first conveying position, performing a combination of a rolling movement and a third linear feed movement for a cutting cylinder along the working surface of the anvil plate between a rest position with a maximum distance from the first end area of the anvil plate and a working position with a minimum distance from the first end area of the anvil plate, with a cutting edge of the cutting cylinder carrying out a severing process for an end area of the film web received between the cutting edge and the working surface carries out and grips and transports away a section of the end region of the film web that has been separated from the cutting edge with a gripping device that is movably mounted on the anvil plate.

When carrying out the method, the film web is either removed from a storage magazine or unwound from a supply roll, the task of the transport cylinder being to alternately carry out a separating process, which is carried out with the cutting cylinder, in each case the end area of the film web in such a way laid out on the working surface of the anvil plate so that a sufficient length of the film web is provided for the subsequent cutting process.

For the implementation of the process, it is assumed that in a previous work step or In a preparatory work step, an end area of the film web is laid out on the working surface of the anvil plate at least in such a way that the end area can be grasped by the transport cylinder. For this purpose, it is provided, in particular, that at least one fluid channel in the transport cylinder, which has at least one orifice opening on the outer surface of the transport cylinder, be subjected to a vacuum by actuating a valve device that is connected downstream of a vacuum supply, so that at least a partial area is sucked in the film web to the outer surface of the transport cylinder takes place. supplementary or alternatively, the use of a gripping strip formed on the transport cylinder can also be provided for gripping the end area of the film web.

In a subsequent step, a first rolling movement takes place for the end region of the film web onto the transport cylinder in the course of a linear movement of the transport cylinder in the direction of a front edge of the anvil plate. This first rolling movement is carried out as a superimposition of a rotation of the transport cylinder around the transport cylinder axis and a translation of the transport cylinder parallel to the working surface. It can be provided that the first rolling movement relative to the working surface of the anvil plate is carried out without slipping, with exactly that length of the end area of the film web being wound onto the transport cylinder that is caused by the rolling movement of the transport cylinder on the working surface of the Anvil plate can be added without the end portion of the film web performing a linear movement relative to the working surface. Alternatively, it can be provided that the first rolling movement for the end region of the film web in relation to the working surface of the anvil plate already takes place with slippage. For this purpose, the rotational movement of the transport cylinder, which is superimposed on the linear movement of the transport cylinder, is selected in such a way that the end area of the film web carries out a linear relative movement in relation to the working surface, with tensile forces acting on the film web, which, for example, result in an unwinding process for the a supply roll on wound foil web leads.

During the execution of the first roll-up movement or after reaching the first conveying position, it can be detected with the aid of the sensor, which is assigned to the transport cylinder, whether a front edge of the end area of the film web is touching is a predetermined position or whether it is required by a further roll-up movement, which is also referred to as a second roll-up movement. If the detection of the front edge of the end area of the film web shows that the front edge is already arranged in the desired position, then a target value and an actual value for controlling the second rolling-up movement match, so that practically no second rolling-up movement is carried out. If, on the other hand, there is a discrepancy between the predetermined position of the front edge and an actual position of the front edge, the second rolling-up movement is carried out with feedback from a respectively updated sensor signal until the discrepancy disappears.

In a subsequent step, a rolling movement for the end area of the film web takes place in order to lay out the end area of the film web on the working surface of the anvil plate in such a way that the subsequent separating process can be carried out properly. For this purpose, it is provided that the transport cylinder performs a slip-free rolling movement relative to the working surface of the anvil plate, which does not result in a linear displacement of the end area of the film web or the exertion of significant tensile forces on the end area of the film web. This rolling movement is also a superimposition of a rotational movement of the transport cylinder and the transport cylinder axis and a linear displacement of the transport cylinder along the working surface of the anvil plate. At the end of this rolling movement, the end area of the film web is released from the transport cylinder, for example by switching off a vacuum supply for the fluid channel and the associated openings or, if necessary, by providing compressed air at the openings, in order to prevent the end area from being blown off and thus the removal of the the end of the to support libahn of the transport cylinder. The transport cylinder is then returned to the first functional position in order to release the work surface for the cutting process to be carried out.

In addition, it can be provided that a negative pressure is applied to at least one fluid channel formed in the anvil plate in order to ensure that the end area of the film web is at least partially on the working surface and thus to stabilize the cutting process.

The severing process for the end area of the film web is carried out with the aid of the cutting cylinder, which starts from a rest position into a working position with a slip-free rolling movement, which includes a superimposition of a rotational movement of the cutting cylinder about a cutting cylinder axis and a linear movement of the cutting cylinder along the conveying axis is transferred. The at least one cutting edge of the cutting cylinder engages with the end area of the film web and carries out the desired cutting process, with which a section from the end area of the film web or a section from the end area of the film web or a combination thereof can be effected.

Depending on the geometry of the cutting cylinder and depending on the geometry of the part cut off from the end area of the film web or cut out of the end area of the film web, the cutting cylinder is first returned without slipping from the working position to the rest position before the part produced is transported away with a gripping device or the part produced is transported away with a gripping device before the cutting cylinder is returned to the rest position. It is preferably provided that the gripping device comprises a sensor, in particular a camera with image processing, with the aid of which quality control can be carried out for the part produced and only those parts that can also be qualified as good parts are sent to downstream processing .

In addition or as an alternative, it can be provided that at least one fluid channel in the cutting cylinder is subjected to a negative pressure in order to transport away the part produced and/or any waste when the return movement is carried out.

In a further development of the method, it can be provided that the end area of the film web is grasped with the transport cylinder in order to carry out a first linear feed movement for the transport cylinder along a work surface of the anvil plate for laying out the end area of the film web on the work surface. This step can be carried out, for example, before the first roll-up movement is carried out, in order to initially provide a sufficient length of the end region of the film web for the first roll-up movement to be carried out.

Furthermore, a separating device for separating a film web in certain areas can be provided, which has an anvil plate with a working surface for laying out a film web and which has a conveying device for conveying the film web along a conveying axis aligned parallel to the working surface and which has a cutting cylinder has at least one cutting edge for carrying out a separating process for the film web taken up between the cutting edge and the work surface, with the edge side of the work surface each having a longest edge Bearing strips aligned parallel to the conveying axis are arranged, which have upper sides aligned parallel to one another and at a first acute angle to the working surface, and wherein the cutting cylinder has two cone sections on an outer peripheral surface, which are aligned at a second acute angle to a cutting cylinder axis and which are designed to rest on the upper sides, with an adjusting device for positioning the cutting cylinder along the cutting cylinder axis being designed between the anvil plate and the cutting cylinder.

Such a separating device enables the distance to be adjusted between the working surface and the at least one cutting edge of the cutting cylinder by moving the cutting cylinder along the cutting cylinder axis, since this causes a superimposed linear movement for the cutting cylinder due to the wedge effect of the top sides of the bearing strips in connection with the cone sections which affects a distance between the cutting cylinder axis and the work surface. Such a configuration of the bearing strips and the cutting cylinder can also be provided for the separating device described in the introduction and claimed in claim 1 and the associated subclaims.

An advantageous embodiment of the invention is shown in the drawing. This shows:

FIG. 1 shows a side view of a separating device with a conveyor device, an anvil plate and a separating device,

FIG. 2 shows an enlarged section of the separating device according to FIG. 1 with some detailed illustrations, 3 shows a top view of a film web that has been processed with the separating device according to FIGS.

FIG. 4 shows a schematic representation of the conveyor device and the separating device as well as the film web in a first work step,

FIG. 5 shows a second work step for the conveying device and the separating device,

FIG. 6 shows a third work step for the conveying device and the separating device,

FIG. 7 shows a fourth work step for the conveying device and the separating device,

FIG. 8 shows a fifth work step for the conveyor device and the separating device,

FIG. 9 shows a sixth work step for the conveying device and the separating device, and

FIG. 10 shows an end view of the anvil plate provided with bearing strips and the cutting cylinder matched to it.

A separating device 1 shown only schematically and not to scale in FIG. 1 is used for processing a film web 2 which is to be separated into individual, purely exemplary rectangular sections, as shown schematically in FIG.

Here, the separating device 1 includes a roll of material 4 on which the film web 2 is wound, a feed unit direction 5 , which is designed to support an unwinding movement for the film web 2 from the material roll 4 , an anvil plate 6 for supporting the film web 2 , a conveyor device 7 and a separating device 8 .

The material roll 4 , the feed device 5 and the anvil plate 6 are arranged purely by way of example on a common machine frame (not shown). The conveyor device 7 and the separating device 8 are arranged on the machine frame so that they can move relative to the anvil plate 6 in a manner that is also not shown, with drives not shown in detail for a relative movement of the conveyor device 7 and the separating device 8 in relation to the anvil plate 6, for example hydraulic cylinders, pneumatic cylinders, hydraulic motors, pneumatic motors , electric servomotors and combinations thereof can be used.

The material roll 4 is designed to provide the film web 2, with the length of the film web 2 wound onto the material roll 4 being many times greater than the length of the anvil plate 6, so that a large number of sections 3 can be cut out of the film web 2 , before a change of the material roll 4 is required.

The feed device 5 arranged adjacent to the material selection 4 comprises, purely by way of example, a side edge control 9 , a first deflection roller 10 , a second deflection roller 11 and a pair of conveyor rollers 12 . The task of the side edge control 9, which scans a lateral edge of the film web 2 by means of a sensor device not shown in detail during a conveying movement of the film web 2, is to ensure that the film web 2 is arranged centrally on the first deflection roller 10. For this purpose, the side edge control 9 via an actuator, also not shown Influencing the alignment of the film web 2 with respect to the first deflection roller 10 . After passing the first deflection roller 10 and the second deflection roller 11, the film web 2 is guided between two conveyor rollers 15, 16 of the conveyor roller pair 12, wherein at least one of the two conveyor rollers 15, 16 can be driven in order to move the film web 2 in the conveying direction shown schematically 17, which can be viewed as a direction vector of a conveyor axis.

As will be explained in more detail below, discontinuous conveyance for the film web 2 is provided, since the processing of the film web 2 on the anvil plate 6 is also carried out discontinuously.

For example, it is provided that in an area between the pair of conveyor rollers 12 and a front edge 18 of the anvil plate 6, a first sensor 40 is arranged above the film web 2, which is used to scan the film web 2 and identify properties of the film web, such as a film type , preferably without contact , can detect . An electrical cal sensor signal of the first sensor 40 is provided to a control and regulating device, not shown, and processed there. By way of example, provision can be made for the conveying movements of the feed device 5 to be adapted on the basis of the sensor signal from the first sensor 40 .

The anvil plate 6 has, purely by way of example, a flat working surface oriented transversely to the plane of representation in FIG. As can be seen from the illustration in FIG. 2, the anvil plate 6 comprises a dimensionally stable, for example designed as a plane parallel plate, Carrier plate 20 which, for example, can be connected to the machine frame (not shown) in a manner not shown in detail. A worktop 21 , also designed purely by way of example as a plane-parallel plate, is attached to the support plate 20 , through which fluid channels 22 pass in certain areas according to the detail view in FIG. 2 . Münchsöf f openings 23 of the fluid channels 22 open out on the working surface 19, which means that when the fluid channels 22 are subjected to negative pressure, this is via a channel system that is not shown and is configured in the working plate 21 and is arranged with a channel system that is not shown and is arranged away from the anvil plate 6 Negative pressure supply is connected, a negative pressure adhesion of the film web 2 to the working surface 19 in the area of the fluid channels 22 can be effected.

Purely by way of example, it is provided that the working surface 19 is provided on both sides with bearing strips 24 which are raised above the working surface 19 and whose longest edge 25 is aligned parallel to a longest edge of the anvil plate 6 . In a cross-sectional plane oriented transversely to the longest edge 25 , the bearing strips 24 can have a rectangular cross-section or a cross-section in the form of a right-angled trapezium with an upper side sloping in the direction of the respective opposite bearing strip 24 . The task of the bearing strips 24 is, in particular, to form a support surface for the separating device 8 described in more detail below with its upper side 27 facing away from the working surface 19 .

The conveying device 7 is designed as a transport cylinder 30 , purely by way of example. A transport cylinder axis 31 extends transversely to the plane of representation in FIGS. 1 and 2 and 4 to 9 and at the same time forms the axis of rotational symmetry for the transport cylinder, which has a circular-cylindrical profile 30 . The transport cylinder 30 is shown only schematically in FIGS. 1 and 4 to 9, purely by way of example, over an angle of 90 degrees over a peripheral surface

32 extended intake area 33 is provided. The intake area

33 is formed by a large number of bores 34 shown purely schematically in FIG. The vacuum channels 35 can be fluidically connected to a vacuum supply, also not shown, via a rotary feedthrough, not shown, so that a vacuum can be provided at the mouth openings 36 of the bores 34 in order to suck in the film web 2 .

The transport cylinder 30 can be moved relative to the anvil plate 6 in various ways. A drive device, not shown, for the transport cylinder 30 comprises, for example, a combination of a linear drive for a linear movement of the transport cylinder in the conveying direction 17 and counter to the conveying direction 17 and a rotary drive for rotating the transport cylinder 30 about the transport cylinder axis 31 . With such a drive device, the transport cylinder 30 can perform a purely linear movement, a purely rotational movement or a superimposition of a linear movement and a rotational movement. Here, the transport cylinder 30 can be moved from the first transport position shown in Figure 2, in which there is a first, minimum distance 37 of the transport cylinder 30 to the front edge 18 of the anvil plate 6, to a second transport position, in which a second, maximum distance of the transport cylinder 30 to the leading edge 18 of the anvil plate 6 can be moved.

With a linear movement of the transport cylinder 30 from the first conveying position in the direction of the second conveying position and with a linear movement of the transport cylinder 30 From the second conveying position in the direction of the first conveying position, the transport cylinder 30 can be rotated or not. The transport cylinder 30 can also perform an exclusive rotational movement in any position between the first conveying position and the second conveying position, but in particular in the first conveying position.

The separating device 8 is designed, purely by way of example, as a cutting cylinder 50 which is equipped with a first cutting edge 52 and a second cutting edge 53 on a circular-cylindrical outer surface 51 . The first cutting edge 52 extends over the entire width of the cutting cylinder 50 and serves to carry out a cross section 54 on the film web 2, as is shown schematically in FIG. The second blade 53 is a shape blade and is used to produce the cutouts 3 in the film web 2, as is shown schematically in FIG.

The cutting cylinder 50 is moved by a drive device (not shown) between a rest position, in which the cutting cylinder 50 has a third, maximum distance 55 from the front edge 18 of the anvil plate 6, and a working position, in which the cutting cylinder 50 has a fourth, minimum distance 56 from the front edge 18 has moved. Purely by way of example, it is provided that the drive device is designed in such a way that there is always a forced coupling between a rotational movement about a cutting cylinder axis 57 and a translational movement parallel to the conveying direction 17 for the cutting cylinder 50 . Provision is preferably made for the drive device and the cutting cylinder 50 to be matched to one another in such a way that the cutting cylinder 50 carries out a slip-free rolling movement on the bearing strips 24 with its outer surface 51 . A sequence for processing an end region 14 of the film web 2 is shown purely schematically in FIGS. According to the illustration in FIG. 4, it is initially assumed that an end region 14 of the film web 2 rests on the anvil plate 6 at least over a certain length, which has been omitted in the illustrations in FIGS. 4 to 9 for reasons of clarity.

In a first step, the transport cylinder 30 is positioned by superimposing a rotational movement and a translational movement in such a way that the suction area 33 is arranged above the end area 14 . Purely by way of example, the transport cylinder 30 is arranged in such a way that the suction area 33 terminates with a front edge 44 of the end area 14 of the film web 2 . As soon as the transport cylinder 30 assumes this position, the vacuum supply can be activated, so that a vacuum is provided at the mouth openings 36 of the bores 34, with which the end region 14 is sucked over the surface to the peripheral surface 32 of the transport cylinder 30.

In a second step, as shown in FIG. 5, the transport cylinder 30 rolls onto the end area 14 of the film web 2 with a counterclockwise direction of rotation in order to start a winding process for the end area 14 onto the transport cylinder 30 . The rolling movement for the transport cylinder 30 is caused by a coordinated superimposition movement between a rotation and a translation for the transport cylinder 30 by the drive device, with a distance between the transport cylinder 30 and the front edge 18 being reduced. In a third step, as shown in FIG. 6, the transport cylinder 30 has reached the first conveying position and assumes the first, minimum distance 37 from the front edge 18 . In this first conveying position, the peripheral surface 32 of the transport cylinder 30 is scanned by a second sensor 41, which is attached to the machine frame of the separating device 1 in a manner not shown in detail and which is designed to detect the front edge 44 of the end region 14 of the film web 2. If the second sensor 41 cannot detect the front edge 44, a corresponding sensor signal is sent to the control and regulating device, not shown, which controls the drive device, not shown, for the transport cylinder 30 in such a way that a purely rotational movement of the transport cylinder 30 in the Direction of the arrow according to the illustration in FIG. 6, which is oriented counterclockwise, purely by way of example, in order to bring about a continuation of the winding process for the film web onto the transport cylinder 30. As soon as the second sensor 41 can detect the front edge 44, it is assumed that a predetermined length of the film web 2 has been wound onto the transport cylinder 30, with which the third step is completed.

In a fourth step, as shown in FIG. 7, a pure rolling movement of the transport cylinder 30 takes place in order to lay out the film web 2 on the working surface of the anvil plate (not shown). This rolling movement is a synchronized superimposition of a rotational movement and a translational movement of the transport cylinder 30 by the drive device (not shown).

In a fifth step, as shown in Figure 8, the cutting cylinder 50 from the rest position in the Working position is transferred, with the distance between the cutting cylinder 50 and the front edge 18 being reduced. It is provided that with the drive device (not shown) for the cutting cylinder 50, a slip-free rolling movement of the outer surface 51 of the cutting cylinder 50 takes place on the bearing strips 24, with the cutting edges 52 and 53 bringing about the desired cutting processes for the end region 14 of the film web 2. At the start of the rolling movement, a third sensor 42 can be used to check whether the cutting edge 53 is in the correct rotational position. If the third sensor 42 should provide a sensor signal to the control and regulating device, not shown, which shows that the cutting edge 53 is not correctly positioned, the cutting device 1 can be switched off and a warning message can be output, for example. Alternatively, with a suitable configuration of the drive device for the cutting cylinder 50, an adjustment process can also be provided by only rotating the cutting cylinder 50 until the cutting edge 53 assumes the desired position.

In a sixth step, as shown in FIG. 9, the section 3, which was cut out of the film web 2 by the cutting cylinder 50, is picked up by a gripper 60, which can be designed in particular as a vacuum gripper and which grips the section 3 can be stored away from the separating device 1 in a suitable magazine. The gripper 60 can be equipped with a fourth sensor 43, which is designed to carry out a quality control for the cutout 3 and to qualify it as a good part or bad part using predetermined criteria. An evaluation of a sensor signal of the third sensor 42 can be carried out, for example, in an evaluation device, not shown, which then provides a control signal for the gripper 60 in order to either feed the cut-out 3 to a downstream processing step or to dispose of the cut-out 3 as scrap. The 63 can have one fluid channel or several fluid channels which are connected to a common vacuum supply and can be controlled by a common valve device or by separate valve devices. This can, for example, a selective grasping and / or filing or. Throwing off the cutout 3 and a waste grid can be realized with the gripper 60 . Furthermore, a further gripper (not shown) can be provided, which transports away from the separating device 1 a remnant of the end region 14 of the film web 2 that remains after the cutout 3 has been removed, which is also referred to as a waste grid.

The cutting cylinder 50 shown in FIG. 10, like the anvil plate 6, is shown only schematically and in no way definitively. Purely as an example, the first cutting edge 52 arranged on the outer surface 51 of the cutting cylinder 50 extends almost over the entire width of the cutting cylinder 50 and, purely as an example, is in cutting engagement with the end region 14 of the film web 2 . The second cutting edge 53 is designed, purely by way of example, as a closed peripheral cutting edge for cutting out a rectangular section 3 from the film web 2 . Furthermore, on the outer surface 51 of the cutting cylinder 50 are arranged bearing rings 58 in the form of sections of a cone, the cone surfaces 59 of which are aligned at an acute angle 64 to the working surface 19 . During a relative movement of the cutting cylinder 50 along the anvil plate 6, the bearing rings 58 carry out a slip-free rolling movement on the bearing strips 24, which are arranged on both sides on the edge of the working surface 19 and which have a profile in the manner of a right - have angled trapezoids. The upper sides 27 of the bearing strips 24 assume the same acute angle 64 to the working surface 19 as the conical faces 59 of the bearing rings 58 . Accordingly, a distance 63 between the cutting cylinder axis 57 and the working surface 19 can be adjusted by a linear displacement of the cutting cylinder 50 along the cutting cylinder axis 57 .

In an embodiment of the anvil plate and/or the cutting cylinder that is not shown, indentations are arranged in the respective surfaces, which are designed to temporarily accommodate components protruding from the film web, such as electronic components integrated into the film web or that the indentations in the anvil plate 6 are arranged in such a way that a cutting edge is formed in the anvil plate 6 itself, which cutting edge acts as a counter-knife to at least one of the cutting edges 52 , 53 on the cutting cylinder 50 .

Claims

32 claims

1. Separating device (1) for separating a film web (2) in certain areas, with an anvil plate (6) which has a working surface (19) for laying out an end region (14) of a film web (2), with a conveyor device (7) which along a conveying axis (17) so as to be linearly movable relative to the anvil plate (6) and which is designed to carry out a delivery movement for the end region (14) of the film web (2) aligned parallel to the working surface (19), with a separating device (8) which is at least a blade (52, 53) for carrying out a severing process for an end region (14) of the film web (2) received between the blade (52, 53) and the work surface (19), the conveyor device (7) and the severing device (8) are designed for alternately carrying out the laying-out movement and the separating process for the end region (14) of the film web (2).

2. Separating device (1) according to claim 1, characterized in that the conveying device (7) in a first conveying position has a first, minimum distance (37) relative to a front edge (18) of the anvil plate (6) aligned transversely to the conveying axis (17) and in a second conveying position assumes a second, maximum distance (38) from the front edge (18) and that the separating device (8) has a third, maximum distance (55) from 33 above the front edge (18) and in a working position occupies a fourth, minimum working distance (56) relative to the front edge (18).

3. Separating device (1) according to claim 2, characterized in that the conveying device (7) has a transport cylinder (30) with a transport cylinder axis (31) aligned transversely to the conveying axis (17) and parallel to the working surface (19), which for the conveying process is carried out with a linear movement along the conveying axis (17) and/or with a rotary movement around the transport cylinder axis (31).

4. Separating device (1) according to claim 3, characterized in that the separating device (8) has a cutting cylinder (50) with a cutting cylinder axis (57) aligned transversely to the conveying axis (17) and parallel to the working surface (19), which for a carrying out the separating process with a superimposition of a linear movement along the conveying axis (17) and a rotational movement around the cutting cylinder axis (57), the at least one cutting edge (52, 53) being attached to an outer surface of the cutting cylinder (50).

5. Separating device (1) according to Claim 4, characterized in that the working surface (19) has a flat, in particular rectangular, support area for the end area (14) of the film web (2) and adjoins the support area on both sides and along the conveying axis (17 ) has bearing strips (24) that extend and protrude from the support area and that the cutting cylinder (50) rests on the bearing strips (24) with an outer surface (51) at least in regions during the movement between the rest position and the working position.

6. Separating device (1) according to one of claims 3 to 5, characterized in that the transport cylinder (30) is assigned a sensor (41) for detecting a front edge (44) of the end region (14) of the film web (2), in particular in the first conveying position, and/or that the cutting cylinder (50), in particular in the rest position, is assigned a sensor (42) for detecting a position of the cutting edge and/or that in the area of the front edge (18) of the anvil plate ( 6) a sensor (40) for detecting properties of the film web (2) is arranged.

7. Separating device (1) according to one of the preceding claims, characterized in that on the working surface (19) and/or on an outer surface (32) of the conveyor device (7) and/or on an outer surface (51) of the separating device (8) at least one mouth opening (36) of a fluid channel (34) is formed, which is designed to provide a negative pressure or a pressurized fluid.

8. Separating device (1) according to Claim 1, characterized in that the at least one cutting edge (52, 53) of the separating device (8) and the working surface (19) of the anvil plate (6) are used to carry out a separating process for the end region (14) of the Film web (2) from the group: cross-cutting of the film web (2), cutting out film sections (3) from the film web (2), pinch cutting, lifting punching, scissor cutting.

9. Separating device (1) according to claim 1, characterized in that the separating device is designed as a lifting punch for carrying out a lifting punch movement transverse to the working surface (19) of the anvil plate (6) and between a rest position with a distance of is greater than an extension of the transport device (7) transversely to the working surface, and a working position with vanishing distance to the working surface (19) is mounted linearly movable to the anvil plate (6).

10. Separating device (1) according to one of the preceding claims, characterized in that a gripper (60) for a removal of good parts in a defined storage position and / or for a removal of waste is arranged relatively movable on the anvil plate (6).

11. Separating device (1), in particular according to one of the preceding claims, for separating a film web (2) in certain areas, with an anvil plate (6) which has a working surface (19) for laying out a film web (2) and which has a conveyor device (7 ) for conveying the film web (2) along a conveying axis (17) aligned parallel to the working surface (19) and to which is assigned a cutting cylinder (50) which can be moved parallel to the working surface (19) and has at least one cutting edge (52, 53) for carrying out a severing process for the film web (2) received between the blade (52, 53) and the working surface (19), with one longest edge (25) aligned parallel to the conveying axis (17) on the edge side of the working surface (19). Bearing strips (24) are arranged, which have upper sides (27) aligned parallel to one another and at an acute angle (64) to the working surface (19), and wherein the cutting cylinder (5 0) has two conical sections (58) on an outer peripheral surface (51) which are aligned at an acute angle (64) to a cutting cylinder axis (57) and which are designed to rest on the upper sides (27) of the bearing strips (24), wherein between the anvil plate (6) and the cutting cylinder (50) an adjustment device 36 device for positioning the cutting cylinder (50) along the cutting cylinder axis (57) is formed.

12. A method for regionally separating a film web (2) with the steps: detecting an end area (14) of a film web (2), which is laid out on a working surface (19) of an anvil plate (6), with a transport cylinder (30), performing a first rolling movement for the end area (14) of the film web (2) onto the transport cylinder (30) during a first linear retraction movement of the transport cylinder (30), detecting a front edge (44) of the end area (14) of the transport cylinder (30) arranged on the transport cylinder (30). Film web (2) with a sensor (41) and regulation of a second rolling-up movement for the transport cylinder (30) at a first transport position, at which the transport cylinder (30) has a first, minimal distance (37) relative to a first end area (18) of the having an anvil plate (6), carrying out a combination of a rolling movement and a second linear feed movement for the transport cylinder (30) along the working surface (19) of the anvil plate ( 6) for depositing the end area (14) of the film web (2) on the work surface (19) and carrying out a second linear retraction movement of the transport cylinder (30) into the first conveying position, carrying out a combination of a rolling movement and a third linear feed movement for a cutting cylinder (50) along the working surface (19) of the anvil plate (6) between a resting position at a maximum distance (55) from the first end region of the anvil plate (6) and a working position at a minimum distance (56) from the first end region (18) of the anvil plate (6 ), wherein a cutting edge (52, 53) of the cutting cylinder (50) carries out a separating process for an end region (14) of the film web (2) received between the cutting edge (52, 53) and the work surface (19) and gripping and transporting away one of the 37

Cut (52, 53) separate section (3) of the end region (14) of the film web (2) with a gripping device (60) movably mounted on the anvil plate (6).

13. The method according to claim 11, characterized in that the end region (14) of a film web (2) is gripped with the transport cylinder (30) in order to initiate a first linear feed movement for the transport cylinder (30) along a working surface (19) of the anvil plate ( 6) for laying out the end area (14) of the film web (2) on the work surface (19).