Recording device for recording film material

Description

[0001] The invention relates to a receiving means for receiving film material for use in a winding machine according to the preamble of claim 1. The invention further relates to a method for carrying out an automated roll change for a winding machine, a device for carrying out an automated roll change and a film production device.

[0002] In film production, films are produced as continuous material and wound onto receiving units (e.g., cores) in winding machines. After the desired length of film has been wound onto the receiving unit, a roll change is performed. For this, the film must be cut and wound onto a new receiving unit.

[0003] It is known from the prior art to prepare the receiving medium with an adhesive and then place it onto a film web that has been lifted from the contact roller. Direct contact of the receiving medium with the contact roller is avoided because, due to the adhesion of the receiving medium's surface to the contact roller surface, parts of the receiving medium would tear off and contaminate the contact roller.

[0004] A disadvantage of known solutions for roll changes is that removing the film web from the contact roller is more complex and time-consuming. Furthermore, it is often impossible to wind the film onto the pickup without any fold-overs. Additionally, the adhesion of the pickup to the film can cause the film web to tear. If the pickup is placed directly onto the contact roller (without first lifting the film web), parts of the pickup detach due to the adhesive and contaminate the contact roller. Furthermore, manual re-gluing of the pickup is necessary, which is a time-consuming step and therefore associated with high costs and reduced speed.

[0005] Examples of prior art include EP 1 306 332 A2, EP 0 931 744 A2, JP 2009 012952 A, JP H07 206234 A and US 2009 / 324868 A1.

[0006] It is therefore an object of the present invention to at least partially overcome the disadvantages described above. In particular, it is an object of the present invention to enable a reliable, fast, and / or more cost-effective roll change for a winding machine. Furthermore, it is a particular object to provide a receiving device that enables rewinding without flipping, thereby preventing contamination of the contact roller.

[0007] The foregoing problem is solved by a receiving device for receiving film material with the features of independent claim 1, by a method with the features of independent claim 2, by a device with the features of independent claim 11, and by a film production device with the features of independent claim 17. Further features and details of the invention will become apparent from the respective dependent claims, the description, and the drawings. Features and details described in connection with the device according to the invention naturally also apply in connection with the method, the receiving device, and the film production device according to the invention, and vice versa, so that the disclosure of the individual aspects of the invention always makes, or can make, reciprocal reference.

[0008] According to the invention, a receiving means for receiving film material for use in a winding machine is proposed, wherein the receiving means comprises at least one storage area for attaching the receiving means to a winding unit of the winding machine and a wall with an outer surface area. The wall is designed such that the surface area can be placed on a transport device of the winding machine and the film material can be received onto the surface area.

[0009] In particular, the receiving medium, preferably its surface area, can be wrapped externally with film material. For this purpose, the film material is transported, for example, in the form of a film web and / or as continuous material, by a transport device of the wrapping machine. As soon as a film end of the film material reaches a contact point (receiving point) between the receiving medium and the transport device, the film end can adhere to the receiving medium and is carried along by it, thus being wound onto the receiving medium, particularly without any turning.

[0010] The surface area of ​​the receiving device is provided to have at least a partial outer adhesive layer for contact with the film material, in order to enable adhesion of the film material to the receiving device for winding (and thus also for picking up or winding). The adhesive layer has an average thickness of no more than 2000 µm in order to preserve the structure of the surface area as much as possible during and / or after placement on the transport device.

[0011] This prevents parts of the receiving device from detaching and thus contaminating the transport device when the receiving device is placed on the transport device due to the adhesion of the adhesive layer to the transport device.

[0012] The receiving element can, for example, be designed as a sleeve for the winding machine, particularly as a cardboard sleeve. When the receiving element is placed onto the transport device, the structure of the surface area of ​​the wall can be affected, for example, by components of the receiving element, such as the outer cardboard layers, detaching at least partially. However, due to the reduction in the average thickness of the adhesive layer, the adhesion, in particular the tackiness or adhesive strength, can be reduced to such an extent that the structure of the surface area is largely preserved and / or no detrimental contamination of the surface of the transport device, in particular a contact roller, occurs during placement.A further advantage of the roll changer arises particularly from the fact that the receiving medium can be automatically prepared with an adhesive to form the outer adhesive layer. The adhesive layer preferably comprises all adhesive areas on the surface and / or on the receiving medium. The remaining areas or surfaces of the surface outside the adhesive layer are preferably free of adhesive and / or non-contact. Non-contact means that these areas only contact the environment (ambient air) and thus do not form an adhesive layer, and accordingly constitute the outermost layer or surface of the receiving medium. This surface or outermost layer is formed in particular by the outer surface of the wall, with the inner surface of the wall preferably forming the bearing area.The wall, in particular the outer wall and / or the surface area, preferably consists of paper and / or pulp and / or partly also plastic and / or metal.

[0013] An adhesive, in particular a hot-melt adhesive, is then applied to form the adhesive layer, for example by an application device of the winding machine. This offers the advantage that the adhesive layer can be applied particularly thinly and automatically. The receiving element according to the invention is therefore suitable for direct contact with the transport device, which is designed, for example, as a contact roller.

[0014] The adhesive and / or the adhesive layer containing the adhesive may preferably comprise a hot melt adhesive, which can be applied, for example, by spraying onto the receiving medium. The adhesive may further, for example, have a viscosity of substantially 4400 MPas (millipast seconds) (at 150°C) and / or substantially 1500 MPas (at substantially 175°C) and / or a density of substantially 0.97 g / cm³ (at approximately 23°C).

[0015] Furthermore, the adhesive is suitable for processing temperatures in the range of 100°C to 250°C, particularly 140°C to 170°C. This allows for the creation of an adhesive layer with such low tack that when the receiving device is placed onto the surface of the transport device, no significant detachment of parts of the receiving device occurs.

[0016] In a measure improving the invention, the average thickness of the adhesive layer can be a maximum of 1000 µm, 700 µm, or 300 µm, and / or in the range of 5 µm to 300 µm, preferably 100 µm to 200 µm, wherein, in particular, the inner surface of the adhesive layer contacts the wall and the outer surface of the adhesive layer and / or the surface areas without an adhesive layer are designed to be non-contacting. The adhesive layer is preferably formed by applying an adhesive to the surface of the receiving medium (i.e., the surface area), in particular by spraying it on. Thus, the receiving medium and / or the adhesive layer is tape-free, so that no manual application of adhesive tape to the receiving medium is necessary.The inner surface of the adhesive layer is preferably designed to contact the wall, i.e., in the direction of the wall, since the adhesive is preferably applied directly to the surface of the wall. When the adhesive-coated receiving element is placed (applied) to the transport device, the receiving element therefore makes contact with the surface of the transport device, specifically the outer surface of the adhesive layer. Thus, during further transport of the film material by the transport device, the adhesion to the adhesive layer allows the film material to be easily wound onto the surface.

[0017] It is also conceivable that the receiving element is designed as a sleeve, particularly for a winding unit configured as a winding shaft or a clamping head. The inner wall can have the bearing area and the outer surface area, with preferably the entire outer surface of the receiving element, especially the surface area, having an adhesive layer covering at least 40%, 70%, 90%, or substantially 100%. Preferably, the surface area can be free of adhesive only in a peripheral region. It is also possible for the surface area to have an adhesive pattern applied by an application device of the winding machine. Applying the adhesive to the receiving element over as large or as full a surface as possible has the advantage of providing a sufficient area for adhesion to the film material.

[0018] The invention also relates to a method for carrying out an automated roll change for a winding machine with a transport device for transporting film material. The method according to the invention comprises the following steps: A. Attaching at least one receiving means to a winding unit, in particular within the winding machine, B. Automated preparation of the receiving means with an adhesive, in particular a hot melt adhesive, by at least one application device, preferably to form an adhesive layer, preferably within the winding machine, C. Placing the receiving means prepared with adhesive onto the transport device to enable the film material to be picked up by the receiving means.

[0019] The inventive method thus offers the same advantages as those described in detail with reference to an inventive receiving means. Furthermore, an inventive receiving means can be used for the inventive method.

[0020] The method according to the invention enables, in particular, automated roll changes with a turn-free winding process and / or a straight-edge cut, especially with automated preparation of the receiving element, particularly a core. Preparation here refers specifically to the (automatic) application of the adhesive, especially a sprayable adhesive, to the outer surface of the receiving element. This preparation is preferably carried out by an application device located within the winding machine. The prepared receiving element is, in particular, free of adhesive tape, thus reducing the effort required for manual application of the adhesive tape during roll changes.This further enables the preferably direct placement of the adhesive-coated receiving device onto the transport device, without contamination of the transport device by detached particles or structure from a surface area of ​​the receiving device. After placement according to step C, the receiving device enables the film material, especially the film tape, to be picked up without any wrapping. For this purpose, a film start is preferably transported into the nip (the receiving point or contact point between the transport device and the coated receiving device). As soon as the film start touches the coated receiving device, the film material adheres to the adhesive and is picked up by it. This results in the film material being wound onto or wound up on the receiving device.The method according to the invention enables this winding process in particular without the need to remove the film material from the transport device, especially a contact roller. Furthermore, automated preparation with the adhesive is possible, eliminating the need for expensive and time-consuming modifications to the cores used. The placement of the adhesive-prepared receiving element onto the transport device is preferably film-free, meaning that no film whatsoever is present between the prepared receiving element and the transport device during placement.Furthermore, it is conceivable that for the inventive method a receiving medium with a sufficiently rigid wall and / or an adhesive adapted accordingly is used, such that the structure of the surface area is largely preserved during and / or after placement on the transport device, meaning in particular that essentially no upper layers of the receiving medium, especially cardboard layers, detach. This approach also has the advantage that no manual intervention is necessary in steps B and C, and thus the roll change is carried out completely automatically.

[0021] Advantageously, the invention provides that, during or after step C, the film material, particularly during further transport through the transport device, is picked up by the receiving element, especially a sleeve, and / or wound onto it essentially without wrapping. This is made possible, in particular, by placing the prepared receiving element directly onto the surface of the transport device without any film material being present at the contact point. This improves the quality of the film roll, i.e., the receiving element with the film material already wound onto it.

[0022] The placement of the receiving device according to step C is carried out directly onto the transport device, in contact with the transport device.

[0023] It is also conceivable that the pick-up device makes at least partial contact with the film material, particularly the film start, during placement. For this to occur, the placement must be coordinated such that, at the moment the film start enters the nip, the simultaneous placement occurs—that is, the simultaneous contact of the pick-up device with the transport device and / or with the film material or the film start. Placement thus occurs either with simultaneous contact of the transport device and the film start, or alternatively, solely with contact of the transport device without contact of the film material.

[0024] Furthermore, the invention may provide that the placement of the receiving element onto the transport device, in particular a contact roller, according to step C, is essentially (i.e., completely) free of contact with the film material. In other words, the area between the transport device and the receiving element is essentially free of film material during placement. The contact roller is specifically designed as a vacuum-cutting contact roller (VSK roller) to enable a better cut for generating the (new) film start during roll changes.

[0025] It is also conceivable that the preparation of the receiving medium is carried out by applying the adhesive over a large area, particularly a full surface, such that a thin layer of adhesive covers at least predominantly or completely a surface area, especially a lateral surface, of the receiving medium. This large-area preparation can preferably be carried out by automated spraying or wetting of the surface of the receiving medium with the adhesive. In full-surface preparation, essentially the entire surface (lateral surface or surface area) of the receiving medium is coated with adhesive.

[0026] This allows for reliable pickup of the film material onto the pickup device according to step C.

[0027] According to a further advantage, the adhesive, in particular an adhesive layer, can have an average thickness of a maximum of 2000 µm, 1000 µm, 700 µm, or 300 µm. Furthermore, the average thickness can also be, for example, in a range of 2 µm to 2000 µm, 5 µm to 300 µm, or 100 µm to 200 µm. The reduced thickness preferably results in lower tackiness, thus preventing parts of the receiving device from detaching during placement according to step C and consequently preventing contamination of the transport device. The average thickness is determined, in particular, by considering the total thickness of the adhesive layer on the receiving device.

[0028] Furthermore, within the scope of the invention, it is conceivable that, according to step B, the adhesive is applied in such a way that only a preparation area has an adhesive layer and / or an edge area of ​​the receiving medium or the surface area is omitted during application. Preferably, a defined edge distance at each beginning and end of the receiving medium (i.e., in particular, the opposite side areas) can be left free of adhesive and / or omitted during application. The preparation area corresponds in particular to the area where winding or rewinding with film material takes place. The edge area can be a defined edge area, preferably in the side area of ​​the receiving medium (i.e., for example, in the area of ​​the core beginning and end), and particularly preferably free of adhesive. This ensures optimal results during rewinding.

[0029] Furthermore, within the scope of the invention, it is conceivable that, according to step B, the adhesive is applied as an adhesive pattern, in particular spiral and / or ring-shaped, for preparation. The adhesive pattern can also be a combination of different shapes (for example, partly ring-shaped and partly spiral-shaped) and / or have at least an edge area that is free of adhesive. It is conceivable that the adhesive pattern is created using a (particularly digital) template.

[0030] For this purpose, the generation of the adhesive image can be controlled, for example, by a control device which, for instance, controls an application device for applying the adhesive image according to step B. This template can, for example, already include the specific shape of the adhesive image, such as a digital image and / or coordinate specification, and / or parameters for the adhesive image, such as the respective pitch of the spiral. Thus, an optimal result can be achieved when winding the film material.

[0031] It can further be provided that, according to step B of the preparation process, the adhesive is applied by an application head of the application device with a spray pressure of at least 0.2 bar, at least 0.4 bar, or at least 0.8 bar, or in a range of 0.1 bar to 1 bar, preferably 0.3 bar to 0.7 bar. This ensures reliable application of the adhesive layer with an optimal thickness.

[0032] Furthermore, within the scope of the invention, it is conceivable that, according to step B, the adhesive is applied, in particular by spraying, in such a way that air is supplied to the adhesive, wherein the temperature of the adhesive and / or the air in an application head of the application device is preferably between 150°C and 300°C, more preferably between 160°C and 220°C. Thus, the adhesive, in particular a hot melt adhesive, can be applied in a hot state to the bonding surface, i.e., to a surface area of ​​the receiving medium, according to step B. The adhesive can be in the unheated state prior to application, for example, as granules, powder, film, rods, or in block form, with the application device heating the adhesive shortly before application.The adhesive is heated to a temperature of, for example, 150°C to 200°C, preferably substantially 160°C. The adhesive comprises, for example, polymers (such as polyamides, polyethylenes, and / or polyesters) and optionally a resin and / or a stabilizer and / or wax. The heating process melts the adhesive, which is then mixed with hot air (for example, at a temperature of 180°C to 220°C) for spraying, for example, in the application head of the dispensing device. This allows for a uniform spraying of the adhesive to form the adhesive layer on the receiving surface according to step B.

[0033] Advantageously, the invention may provide that in step B, the receiving element is rotated by the winding unit, in particular a winding shaft, especially while the application device is moved simultaneously, or vice versa. The receiving element is, for example, cylindrical in shape, so that the entire surface must be accessible to the application device for preparation. Therefore, the receiving element can, for example, be rotated about an axis of rotation during preparation, while, for example, the application head is moved along the same axis of rotation. Alternatively or additionally, it is conceivable that the application device or the application head is designed to be displaceable along the axis of rotation and / or rotatable about the receiving element.For the movement, for example a drive unit can be provided which moves the application device or the receiving device which is movably mounted in a guide.

[0034] It is also conceivable that when the prepared receiving element is placed onto the transport device according to step C, the film material, in particular completely and / or at least in the area of ​​a film start, makes contact with the surface of the transport device, whereby the placement of the receiving element is achieved without lifting. The term "without lifting" in this context refers to the fact that the structure of a surface area of ​​the receiving element is largely preserved during placement. In particular, the film web in the area of ​​the film start does not need to be lifted from the surface of the transport device in order to place the prepared receiving element onto the transport device for winding. This has the advantage that winding can be carried out without any fold-over. Furthermore, it has the advantage that the film layers of the finished winder are not unintentionally stuck together.

[0035] According to a further advantage, it is conceivable that a first receiving means is attached to a first winding unit for receiving the film material, wherein the first receiving means is prepared with adhesive according to step B, and a second receiving means with already wound film material is attached to a second winding unit, wherein a roll change takes place such that before, during, or after step C, the film material is cut at a separation point of the film material, wherein the film material remaining on the transport device forms a film start at the separation point, and preferably subsequently and / or after the first receiving means has been attached according to step C, the film start is transported to the contact point of the first receiving means with the transport device in order to cause the film material to be wound onto the first receiving means.The winding process is achieved in particular by preparing the first receiving element with an adhesive that causes the beginning of the film to adhere to it. The film material can then be wound onto the first receiving element, particularly by rotating it. Preferably, the first receiving element is a receiving element according to steps A to C, while the second receiving element can be processed in the same way according to steps A to C or be designed independently. Thus, the first receiving element is preferably a new receiving element that is free of film material, and the second receiving element is a pre-wound film roll. The separation point is preferably located at the transport device or between the transport device and the second receiving element.Due to the cutting of the film material, which is preferably carried out by a cutting device, the film material is divided into two parts. A first part remains attached to the second receiving device, and a second part, with the film beginning, remains attached to the transport device. The film beginning is specifically the area that, during further transport of the film material along the transport device, first reaches the contact point and thus makes contact with the first receiving device. This allows for a quick and reliable roll change.

[0036] Furthermore, it may be provided that a further, in particular a second, receiving means is provided, which has wound film material that is materially and / or integrally and / or monolithically connected to the film material on the transport device, wherein, for the roll change, particularly at or before step C, the film material on the transport device is cut to break the connection. The cutting is preferably carried out by a cutting device which is arranged in the area of ​​the transport device. Thus, the roll change can be carried out automatically and with little effort.

[0037] It can also be provided that the film material is picked up by the receiving device in such a way that the picking up and / or winding and / or rewinding of the film material can be carried out in both clockwise and counterclockwise directions, thus enabling, in particular, a reversal of the direction of rotation. An automated roll change can therefore be performed in both directions of rotation, whereby, during winding, the transport device can be rotated around the axis of rotation in both clockwise and counterclockwise directions. Picking up the film material, that is, contacting the beginning of the film with the receiving device (especially with the first receiving device), can therefore take place, in particular, from two different sides.

[0038] It is also possible for the film material to be cut for roll changes by a cutting device, either straight across, in particular by a cutting blade, and / or at an angle, in particular by a scraper blade. For this purpose, the cutting device can preferably be arranged on and / or within the transport device. The transport device is preferably designed as a contact roller, in particular a VSK roller, and thus enables, in particular, a straight cut.

[0039] It can also be provided that a cutting device with a scraper blade is included, which is preferably arranged outside the transport device. The scraper blade and / or the cutting device is preferably arranged or attached outside the transport device to a frame of the transport device or the device according to the invention. The transport device preferably has a groove, which is particularly preferably spiral-shaped or spirally shaped. In particular, the scraper blade can move along or in this groove to cut the film material, especially axially to the transport device (especially parallel to the axis of rotation of the transport device). Since the scraper blade pulls axially to cut, the groove on the transport device, especially a contact roller, is preferably at least partially spiral-shaped (or spirally shaped) and / or runs at an odd angle on the surface of the transport device.The scraper blade can, for example, enter the groove for cutting during the rotation of the transport device, particularly synchronized to the rotational or track speed, wherein the groove is preferably incorporated into the transport device.

[0040] Furthermore, it can be provided that, according to step A, at least two receiving means are attached to the single winding unit, wherein a sensor device is provided in particular, and the sensor device preferably detects the distance between the adjacent receiving means and / or the distance between preparation areas of the receiving means at or before step B, in order to exclude the detected distance from the application of adhesive according to step B. The at least two, three, or four receiving means are thus arranged side by side, for example, along a rotational axis of the winding unit, wherein a defined distance between the adjacent receiving means is preferably provided. This allows several receiving coils to be wound and / or prepared with adhesive simultaneously on a single winding unit.Since the gap or space between the receiving surfaces is not to be treated with adhesive, as no receiving surface is intended for this area, this gap is specifically detected by sensors or sensor elements of the sensor device, and accordingly, the gap is not treated or sprayed with adhesive. Furthermore, it is also conceivable that the sensor elements of the sensor device detect a preparation area, whereby only this preparation area is treated with adhesive, excluding, for example, a peripheral area of ​​the receiving surfaces, which may also include the gap between the receiving surfaces, from the adhesive.The sensor device can further include sensor elements for detecting additional parameters, such as the diameter of the receiving device with the film material, in order to, for example, detect whether a desired film length has been wound onto the receiving reel and, if necessary, trigger an automatic roll change in the continuous process. The automated roll change includes, for example, cutting the film material transversely to the direction of travel, in particular by a cutting device, and initiating winding onto a new (first) receiving device according to steps A to C.

[0041] Furthermore, it is conceivable that a control device and / or a drive unit controls the positioning of the receiving element relative to the application device, or vice versa, particularly depending on the detection by the sensor device, preferably coordinated with further process parameters, especially a rotational speed of the winding unit and / or a movement speed of the application device. It is possible that the control device coordinates with at least one of the following process parameters, or directly controls the process parameters at least partially: overpressure and / or underpressure generation at the transport device, positioning of the receiving element, positioning of the application device, rotational speed of the transport device, rotational speed of the winding unit, and position of the film start.For example, a first control device for the drive unit and / or a second control device for the winding unit and / or a third control device for the transport device or other process parameters can be provided. This ensures optimal coordination of the automatic roll change.

[0042] Also protected is a device for carrying out an automated roll change. The device according to the invention has the following features: at least one winding unit for receiving at least one receiving means, at least one application device for automatically preparing the receiving means with an adhesive, in particular a hot melt adhesive, a transport device for transporting film material, wherein the receiving means prepared with adhesive can be placed on the transport device in such a way that it is possible to pick up the film material from the receiving means.

[0043] Thus, a device according to the invention offers the same advantages as those already described in detail with reference to a method and a receiving means according to the invention. Furthermore, the device according to the invention can be suitable for operation according to a method according to the invention. A receiving means according to the invention is used for the device according to the invention.

[0044] The device according to the invention is preferably a winding machine, particularly for cast film and / or blown film. The device according to the invention is preferably suitable for winding continuous material.

[0045] Furthermore, the invention may provide that the application device has an application head, in particular a spray head, arranged in the area of ​​the winding unit, especially for spraying a large surface area of ​​the receiving medium, wherein the application device is designed to be displaceable essentially parallel to a rotational axis of the receiving medium. It is conceivable that a control device is provided which automatically moves and / or displaces the application head and / or other parts of the application device, particularly depending on measured values ​​from a sensor device. This enables optimal automation of the roll change.

[0046] According to a further advantage, the invention may provide that the application device and / or the winding unit are attached to a mechanical drive unit in order to adjust the distance between the application device and the winding unit and / or the receiving device by positioning, wherein the drive unit is preferably provided on at least one side region of the winding unit. The winding unit is preferably designed as a winding shaft, so that the winding unit is optionally rotatably mounted on the drive unit and / or is designed to be rotatable by the drive unit. Alternatively or additionally, a holding device may be provided which receives the application device and / or the winding unit. The application device and / or the winding unit may be attached to the holding device and / or the drive unit and / or the device according to the invention in a detachable or permanent manner.This enables a reliable automated role change.

[0047] Furthermore, the invention may provide that the distance between the application device and the receiving means for preparing the receiving means with the adhesive is between 10 mm and 20 mm, preferably between 13 mm and 17 mm. This allows for a defined application of the adhesive to the surface area of ​​the receiving means, and in particular to an adhesive image.

[0048] Furthermore, the invention may provide that at least one conduit element, in particular an adhesive and / or air conduit element, especially a heating hose, is connected to the application device, wherein the conduit element is preferably heat-resistant and / or flexible in order to convey the adhesive and / or heated air to the application head. Preferably, a separate air conduit element may also be connected to the application device. In this way, reliable transport of the heated adhesive and / or heated air within the application device to the application head is possible. The conduit elements are, for example, designed as hoses and / or, due to their flexibility, allow movement of the application head relative to the transport device.

[0049] Advantageously, the conductor element can be provided to be heat-resistant up to at least 300°C, preferably up to at least 200°C, and / or substantially up to at least 160°C, and is particularly designed as a plastic tube. This enables reliable application of the adhesive to the receiving medium.

[0050] Optionally, the application device can be slidably arranged on a guide that extends at least along the winding unit to enable, in particular, complete application of the adhesive to the receiving medium. Therefore, the guide may extend along at least the entire length of the winding unit, for example, in the direction of an axis of rotation of the winding unit. The guide may be connected, for example, to a drive unit and / or to a holding device of the device according to the invention. This allows a large-area adhesive layer to be reliably produced on the receiving medium.

[0051] Furthermore, the application device may include at least one sensor device with at least one sensor element, wherein the sensor element is aligned with the winding unit and is particularly designed as a distance sensor to perform and / or detect and / or recognize and / or control positioning on the receiving device. The sensor element may, for example, be configured as a light sensor for distance measurement.

[0052] For this purpose, the sensor element can, for example, also include a transmitting and / or receiving element to detect, for instance, reflected light. The sensor element can also be designed, for example, to detect a distance between adjacent receiving elements on the winding unit (i.e., a gap or distance between the receiving elements). This enables optimal automation.

[0053] It is also conceivable that the transport device has a non-stick coating, particularly to preserve the structure of a surface area of ​​the receiving element placed on the transport device as much as possible. This ensures that the adhesive applied to the receiving element does not detach from the surface area and therefore does not adhere to the transport device.

[0054] Furthermore, the transport device may be provided with at least one opening for generating overpressure and / or underpressure, which, when film material is applied, can be positioned below the film material in such a way that the film material can be drawn in and / or repelled by the transport device. The openings can, for example, be fluidically connected to a turbomachine, particularly within the transport device, for generating overpressure and / or underpressure. When transporting film material onto the transport device, it is often necessary for the film material to be drawn in by the cutting device during a cutting process and repelled during winding, for example, to support automated roll changes. The turbomachine can be controlled automatically, for example, by a control device.The control device can, for example, be connected to a sensor device which measures the status of the device according to the invention, i.e., for example, the rotation speed and / or the position of the film start.

[0055] Furthermore, a cutting device for severing the film material may be provided, and in particular, the transport device may have a gap extending, especially along the axis of rotation of the transport device, with the cutting device preferably being extendable through the gap for severing. The cutting device and / or the gap has an extent that, for example, is substantially the width of the film material on the transport device and / or, for example, at least 70% or 80% of the width of the transport device. It is possible that, under normal conditions, the cutting device is fully retracted into the transport device and only extends to sever the film material when a roll change is performed. The severing process can, for example, be controlled by a control device and monitored by a sensor device.

[0056] It may also be provided that at least one positioning sensor is located immediately adjacent to the transport device and the receiving element in order to detect the position of the receiving element on the transport device. The positioning sensor may, for example, be designed as a distance sensor or include other sensors, such as cameras or the like. Optionally, a first or second drive unit may also be provided to move the winding element between the application device and the transport device. In this way, the roll change can be coordinated by the control device.

[0057] It is also conceivable that a positioning sensor and / or a sensor device is directly or indirectly electrically and / or wirelessly connected to a control device for positioning the receiving element on the transport device, in particular for placing it onto the transport device, in order to effect the placement essentially at the moment when the beginning of the film material contacts the receiving element on the transport device. This prevents contamination of the transport device and also enables, if necessary, unwinding.Since preferably only the beginning of the film material contacts the receiving device, and since the beginning of the film material specifically encompasses the entire cut area of ​​the film material at a cut point created by the cutting device during the cutting process, there is therefore no overhang of the film material on the receiving device that would prevent it from winding without kinking. In other words, when the receiving device is placed on and / or makes contact with the transport device, the film material is only in contact with the transport device on one side of the receiving device.

[0058] Furthermore, it may be provided that a sensor device and / or a positioning sensor is directly or indirectly electrically and / or wirelessly connected to the application device in order to perform automated preparation depending on the position of the receiving element on the transport device. The automated preparation is carried out in particular according to step B of a method according to the invention. This enables reliable automation of the roll change.

[0059] The invention also relates to a film production device, in particular for the production of cast or blown film, which is preferably designed as a blown film line or a cast film line. The film production device according to the invention is particularly suitable for operation according to a method according to the invention and / or with a device according to the invention and / or with a receiving means according to the invention. For example, integration of the device according to the invention into the film production device according to the invention is possible. The film and / or the film material can, for example, have several layers and be transported as continuous material by a transport device.The film production device according to the invention thus offers the same advantages as have been explained in detail with reference to a device and / or a method and / or a receiving means according to the invention.

[0060] Further advantages, features, and details of the invention will become apparent from the following description, in which exemplary embodiments of the invention are described in detail with reference to the drawings. The drawings schematically show: Fig. 1 a perspective view of a receiving means according to the invention, Fig. 2 an enlarged view of an adhesive layer on a wall of the receiving means according to the invention, Fig. 3 a perspective view of two receiving means arranged adjacent to each other on a winding unit, Fig. 4 a perspective view of a device according to the invention, in particular as part of a film production device according to the invention, Fig. 5 a side view of a device according to the invention, Fig. 6 an arrangement of a device according to the invention, Fig. 7 an enlarged view of parts of a device according to the invention, Figs. 8 to 14 side views of a device according to the invention for visualizing a method according to the invention, Fig. 15 visualization of process steps of a method according to the invention.

[0061] In the following figures, identical reference numerals are used for the same technical features even for different embodiments.

[0062] In Fig. 1A schematic perspective view of a receiving element 200 according to the invention is shown. A wall 220 is visible, which is preferably hollow cylindrical and has an inner and an outer surface. The inner surface forms a bearing area 210 for attaching the receiving element 200 to a winding unit 20 of a winding machine 10. The winding unit 20 is, for example, designed as a winding shaft and can, in particular, be inserted into the receiving element 200. The bearing area 210 thus makes direct contact with the winding unit 20 and enables, for example, a rotationally fixed and / or immovable mounting of the receiving element 200 on the winding unit 20, so that when the winding unit 20 rotates, the receiving element 200 also rotates. Alternatively, a rotatable mounting of the receiving element 200 on the winding unit 20 can also be provided.The outer surface of the wall 220 comprises a surface area 230 of the receiving means 200. This receiving area 230, as the outer surface of the receiving means 200, is suitable for receiving or winding up film material 250. Fig. 1 The wound-up film material 250 is visible, but it is only covered by a portion of the surface area 230. This area corresponds, for example, to a preparation area 231, which is coated with adhesive 234. The free area of ​​the surface area 230, which is not covered by film material 250, corresponds, for example, to an edge area 232.

[0063] Fig. 2Figure 1 shows an enlarged cross-sectional view through an outer adhesive layer 235 with an adhesive 234, which is formed on a surface area 230 of the wall 220 of the receiving medium 200. The average thickness D of the adhesive layer 235 is also indicated. The maximum and minimum thicknesses of the adhesive layer 235 can deviate from the average thickness D by, for example, a maximum of 50%, 30%, or 10%, respectively.

[0064] Fig. 3Figure 1 shows a schematic perspective view of two receiving means 200, wherein a first receiving means 200a and a second receiving means 200b are arranged adjacent to a winding unit 20. Both receiving means 200 according to the invention are movably or immovably mounted on the winding unit 20 in a bearing area 210. Preferably, the winding unit 20 is rotatably mounted to cause rotation of the receiving means 200, which are rotationally fixed to the winding unit 20. The two receiving means 200 according to the invention are arranged on a common winding unit 20, with a gap or space visible between the first receiving means 200a and the second receiving means 200b. This space is optionally excluded from the automated preparation of the receiving means 200 with an adhesive 234.It is also conceivable that an edge area 232 is excluded from the preparation and is therefore free of adhesive after preparation. Thus, during automated preparation, the adhesive is preferably applied exclusively in a preparation area 231 of the receiving medium 200 or receiving mediums 200, or exclusively in a defined area according to an adhesive pattern 233.

[0065] In Fig. 4A schematic representation of a device 10 according to the invention is shown, which is, for example, a component of a film production device 100 according to the invention, particularly for the production of cast or blown film. The device 10 according to the invention comprises at least one winding unit 20 for receiving at least one receiving element 200 and at least one application device 40 for the automated preparation of the receiving element 200 with an adhesive 234. Furthermore, the device 10 according to the invention comprises a transport device 30, which is, for example, designed as a contact roller 30 and is configured for transporting film material 250. The transport device 30 can, for example, be configured as a VSK roller and may, for example, have several openings 35, which serve to generate a vacuum or overpressure. In addition, a gap 36 can be provided along a rotational axis R, through which a cutting device 37 can be extended.

[0066] In Fig. 5A side view of a device 10 according to the invention is shown. The transport device 30, which is rotatably mounted about a rotational axis R, is visible. It can also be seen that film material 250 is wound onto a receiving element 200 according to the invention, in particular a second receiving element 200b on a second winding unit 20b. This creates a film roll, which, when the desired film length is reached, is replaced by an automated roll change with a new receiving element 200, in particular a first receiving element 200a. For this purpose, the first receiving element 200a is mounted on a first winding shaft 20a to be prepared with adhesive 234.The application of the adhesive 234 to form the adhesive layer 235 is carried out by an application device 40, which is movably mounted on a guide 55 and / or is moved by a drive unit 50, for example along the axis of rotation R.

[0067] Fig. 6This serves to illustrate the structure of a device 10 according to the invention and its integration into a film production device 100. The film production device 100 can, for example, be configured as a cast or blown film line, wherein the produced films are transported to the device 10 according to the invention, in particular a winding machine 10, for winding onto receiving means 200 according to the invention. For carrying out an automated roll change, a control device 70 of the device 10 is provided, which is, for example, also connected to a sensor device 60 of the device 10 according to the invention for monitoring the roll change. The sensor device 60 has, for example, a sensor element 61 and / or a positioning sensor 62.

[0068] In Fig. 7Figure 1 shows an enlarged view of parts of a device 10 according to the invention, in particular an application device 40. It can be seen that the application device 40, in particular an application head 41 of the application device 40, is arranged at a distance from the winding unit 20 and / or the receiving means 200. For example, the application head 41 can be moved along the guide 55, whereby a heated adhesive 234 is transported to the application head 41 by means of guide elements 45. To follow the movement, the guide element 45 is in particular flexible and / or designed as a hose. For monitoring the distance of the application head 41 from the winding unit 20 and / or from the receiving means 200 according to the invention, a sensor device 60 is provided, which preferably has at least one sensor element 61 or at least one distance sensor 61.

[0069] In the Figs. 8 to 14Figure 1 shows a side view of parts of a device 10 according to the invention, wherein a transport device 30 is depicted, which is rotatably mounted about an axis of rotation R. A further roller 38, in particular a support roller 38, is also provided, on which film material 250 is guided to the transport device 30. The film material 250 is transported along the transport device 30 to a film roll, which is formed by a second receiving element 200b on a second winding unit 20b and the wound film material 250. A spray head 41 for spraying the receiving element 200 according to the invention with an adhesive 234 is also shown. In the area of ​​the spray head 41, a first receiving element 200a is arranged on a first winding unit 20a.

[0070] According to Fig. 8First, the basic position of the device 10 according to the invention is shown, in which the winding onto the second receiving means 200b takes place. When the desired film length is reached, according to Fig. 9 A roll change is initiated, whereby the first receiving device 200a moves into the gluing position with the first winding shaft 20a. According to Fig. 10 The automated preparation of the first receiving medium 200a with the adhesive 234 then takes place to form an adhesive layer 235 on the first receiving medium 200a. During the application of the adhesive 234, the first winding unit 20a rotates together with the first receiving medium 200a. After the desired area has been coated with adhesive 234, the first winding unit 20a is wound with the first receiving medium 200a according to Fig. 11The film web is brought into a waiting position and is also cut by a cutting device 37. The cutting device 37 cuts at a separation point 251, at which a film start 251 is now created on the film material 250 remaining on the transport device 30.

[0071] According to Fig. 12The first receiving device 200a, prepared with adhesive 234, is now placed onto the transport device 30 to enable the receiving device 200 to pick up the film material 250. The film beginning 251 of the film material 250 is transported along the transport device 30 towards the first receiving device 200a. The placement of the first receiving device 200a, or the receiving device 200, and the necessary movement of the winding unit 20, or the first winding unit 20a, are coordinated and controlled, for example, by a control device 70, optionally using a sensor device 60.

[0072] According to Fig. 13 The finished film roll, i.e., the second winding unit 20b, is then pulled off the transport device 30 with the second receiving device 200b, and the winding of the first receiving device 200a takes place. According to Fig. 14The new, first winding unit 20a, together with the new, first receiving device 200a, is now moved into the home position, that is, into the position previously occupied by the second winding unit 20b. This completes the automated roll change.

[0073] In Fig. 15 Schematic representations of the process steps of a method 300 according to the invention are shown. In a first process step 301, the receiving medium 200 is automatically prepared with an adhesive 234. In a second process step 302, the receiving medium 200 prepared with adhesive 234 is placed on the transport device 30 to enable the receiving medium 200 to pick up the film material 250. Reference symbol list

[0074] 10 Device, winding machine 20 Winding unit 20 First winding unit 20 Second winding unit 30 Transport device 35 Openings 36 Gap 37 Cutting device 38 Support roller 40 Application device 41 Application head, spray head 45 Conduit element 50 Drive unit 55 Guide 60 Sensor device 61 Sensor element, distance sensors 62 Positioning sensor 70 Control device 100 film production device 200 Absorption medium 200a first absorption medium 200b second absorption medium 210 Storage area 220 Wall 230 Surface area, casing surface 231 Preparation area 232 Edge area 233 Adhesive image 234 Adhesive 235 Adhesive layer 250 Film material 251 Separation point, film beginning 300Procedure 301First process step 302Second process step D Thickness of the adhesive layer R Rotation axis

Claims

1. Receiving means (200) for receiving film material (250) for use in a winding machine (10), wherein the receiving means (200) comprises at least one bearing region (210) for attaching the receiving means (200) to a winding unit (20) of the winding machine (10), and a wall (220) with an outer surface region (230), wherein the wall (220) is designed such that the surface region (230) can be placed on a transport device (30) of the winding machine (10) and the film material (250) can be received on the surface region (230), wherein the surface region (230) has, at least partially, an outer adhesive layer (235) for making contact with the film material (250), characterized in that the adhesive layer (235) has an average thickness (D) of a maximum of 2000 µm, in order to retain the structure of the surface region (230) during and / or after placing on the transport device (30) as far as possible, wherein the adhesive layer (235) is formed from an adhesive applied to the receiving means (200), wherein the adhesive is suitable for an application temperature in the range of 100°C to 250°C.

2. Method (300) for performing an automated reel change for a winding machine (10) with a transport device (30) for transporting film material (250), having the following steps: A. Attaching at least one receiving means (200) to a winding unit (20), B. Automated preparation of the receiving means (200) with an adhesive (234), in particular a hot melt adhesive (234), by means of at least one application device (40), C. Placing the receiving means (200) prepared with adhesive (234) on the transport device (30), in order to facilitate reception of the film material (250) from the receiving means (200), characterized in that the receiving means (200) is placed directly on the transport device (30) and is in contact with the transport device (30).

3. Method (300) according to claim 2, characterized in that the receiving means (200) is placed, in accordance with step C, substantially without contact with the film material (250), or only in contact on a contact region of the film material (250), in which the film material (250) rests on the transport device (30).

4. Method (300) according to any one of claims 2 or 3, characterized in that the adhesive (234), in particular an adhesive layer (235), has an average thickness (D) of a maximum of 2000 µm or a maximum of 1000 µm or a maximum of 700 µm or a maximum of 300 µm.

5. Method (300) according to any one of claims 2 to 4, characterized in that in accordance with step B, preparation for applying the adhesive (234) occurs such that only one preparation region (231) has an adhesive layer (235) and / or an edge region (232) of the receiving means (200) is omitted during application, and / or in that, in accordance with step B, preparation for applying the adhesive (234) occurs by means of an application head (41) of the application device (40) with a spray pressure of at least 0.2 bar or at least 0.4 bar or at least 0.8 bar.

6. Method (300) according to any one of claims 2 to 5, characterized in that in accordance with step B, preparation for applying the adhesive (234), in particular spraying, occurs such that air is added to the adhesive (234), wherein the temperature of the adhesive (234) and / or the air in an application head (41) of the application device (40) is preferably between 150°C and 300°C, preferably between 160°C and 220°C, and / or in that during step B, the receiving means (200) is rotated by the winding unit (20), in particular a winding shaft (20), in particular with simultaneous movement of the application device (40), or vice versa, and / or in that when placing the prepared receiving means (200) on the transport device (30) in accordance with step C, the film material (250) makes contact, in particular completely and / or at least in the region of the start of the film (251), with the surface of the transport device (30), wherein, in particular, the receiving means (200) is placed for the receiving means (200) without removal.

7. Method (300) according to any one of claims 2 to 6, characterized in that a first receiving means (200a) is attached to a first winding unit (20a) for receiving the film material (250), wherein the first receiving means (200a) is prepared with adhesive (234), in accordance with step B, and a second receiving means (200b) with already wound film material (250) is attached to a second winding unit (20b), wherein a reel change occurs such that, before or during or after step C, the film material (250) is cut at a cutting point (251) of the film material (250), wherein the film material (250) remaining on the transport device (30) has a start of the film (251) at the cutting point (251), and preferably subsequently and / or after placing the first receiving means (200a), in accordance with step C, the start of the film (251) is transported to the contact point of the first receiving means (200a) with the transport device (30), in order to initiate winding of the film material (250) on the first receiving means (200a).

8. Method (300) according to any one of claims 2 to 7, characterized in that a further, in particular, second receiving means (200b) is provided, which has wound film material (250), which is integrally connected to the film material (250) on the transport device (30), wherein, for the reel change, in particular before or during step C, the film material (250) on the transport device (30) is cut, in order to sever the connection, wherein the film material (250) is preferably cut for the reel change with a straight edge by a cutting device (37), in particular by a cutting blade, and / or diagonally, in particular by a scraper.

9. Method (300) according to any one of claims 2 to 8, characterized in that in accordance with step A, at least two receiving means (200) are attached to the single winding unit (20), wherein, in particular, a sensor device (60) is provided, and the sensor device (60), preferably during or before step B, detects the distance between adjacent receiving means (200) and / or the distance between preparation regions (231) of the receiving means (200), in order, in particular, to exclude the detected distance from an application of adhesive (234) in accordance with step B, and / or positioning of the receiving means (200) relative to the application device (40) or vice versa is controlled by a control device (70) and / or a drive unit (50), in particular as a function of detection by the sensor device (60), preferably coordinated with further process parameters, in particular a rotation speed of the winding unit (20) and / or a speed of movement of the application device (40).

10. Method (300) according to any one of claims 2 to 9, characterized in that the receiving means (200) is designed according to claim 1.

11. Device (10) for performing an automated reel change, having: - at least one winding unit (20) for receiving at least one receiving means (200), - at least one application device (40) for automated preparation of the receiving means (200) with an adhesive (234), in particular a hot melt adhesive (234), - a transport device (30) for transporting film material (250), - a receiving means (200) according to claim 1, wherein the receiving means (200) prepared with adhesive (234) can be placed on the transport device (30) such that receiving the film material (250) can be performed by the receiving means (200).

12. Device (10) according to claim 11, characterized in that the application device (40) has an application head (41) arranged in the region of the winding unit (20), in particular a spray head (41) for spraying a surface region (230) of the receiving means (200), wherein, in particular, the application device (40) is designed to be movable substantially parallel to an axis of rotation (R) of the receiving means (200), and / or the application device (40) and / or the winding unit (20) are attached to a mechanical drive unit (50), in order to adjust a distance between the application device (40) and the winding unit (20) and / or the receiving means (200) by positioning, wherein the drive unit (50) is preferably provided on at least one side region of the winding unit (20).

13. Device (10) according to any one of claims 11 or 12, characterized in that at least one adhesive- and / or air-conducting duct element (45), in particular a heated hose, is connected to the application device (40), wherein the duct element (45) is designed to be, in particular, heat-resistant and flexible, in order to feed the adhesive (234) and / or heated air to the application head (41).

14. Device (10) according to any one of claims 11 to 13, characterized in that the application device (40) is arranged movably on a guide (55), which extends at least along the winding unit (20), in order to facilitate, in particular, complete application of the adhesive (234) on the receiving means (200), and / or the application device (40) has at least one sensor device (60) with at least one sensor element (61), wherein the sensor element (61) is focused on the winding unit (20) and / or on the receiving means (200), and is designed, in particular, as a distance sensor (61), in order to perform and / or detect positioning on the receiving means (200).

15. Device (10) according to any one of claims 11 to 14, characterized in that the transport device (30) has a non-stick coating, in particular in order to retain the structure of a surface region (230) of the receiving means (200) placed on the transport device (30) as far as possible, and / or at least one positioning sensor (62) is provided immediately adjacent in the region of the transport device (30) and the receiving means (200), in order to detect the position of the receiving means (200) on the transport device (30), and / or a positioning sensor (62) with a control device (70) for positioning the receiving means (200) on the transport device (30), in particular for placing on the transport device (30), is directly or indirectly electrically and / or wirelessly connected, in order to initiate placing substantially at the time at which the start of the film (251) of the film material (250) makes contact on the transport device (30) when placing the receiving means (200) and / or a sensor device (60) and / or a positioning sensor (62) is directly or indirectly electrically and / or wirelessly connected to the application device (40), in order to perform automated preparation as a function of the position of the receiving means (200) on the transport device (30).

16. Device (10) according to any one of claims 11 to 15, characterized in that the device (10) can be operated according to a method (300) according to any one of claims 2 to 10.

17. Film production device (100), in particular for producing cast or blown film, with a device (10) according to any one of claims 11 to 16, which can be operated, in particular, according to a method (300) according to any one of claims 2 to 10.