EP3341313B1 - Receiving means for receiving film material - Google Patents

Description

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.

In film production, films are produced as continuous material and wound onto a support (e.g. tube) in winding machines. After the desired length of film has been wound onto the support, a roll change is carried out. To do this, the film must be cut and wound onto a new support.

It is known from the prior art to prepare the receiving means with an adhesive and then place it on a film web that is lifted from the contact roller. Direct placement of the receiving means on the contact roller is avoided because the adhesion of the surface of the receiving means to the contact roller surface causes parts of the receiving means to tear off and contaminate the contact roller.

The disadvantage of the known solutions for changing the roll is that lifting the film web from the contact roller is more complicated and time-consuming. Furthermore, it is often not possible to wind the film onto the receiving device without wrapping it around. Furthermore, the film web can tear due to the adhesion of the receiving device to the film. If the receiving device is placed directly onto the contact roller (without lifting the film web first), parts of the receiving device come loose due to the adhesion of the adhesive and contaminate the contact roller. Furthermore, the receiving device must be glued manually, which is a time-consuming step and therefore involves high costs and a loss of speed.

Exemplary state of the art EP 1 306 332 A2 , EP 0 931 744 A2 , JP 2009 012952 A , JP H07 206234 A and US 2009/324868 A1 .

It is therefore an object of the present invention to at least partially eliminate the disadvantages described above. It is a particular object of the present invention to enable a reliable, quick and/or more cost-effective roll change for a winding machine. Furthermore, it is a particular object to provide a receiving means which enables winding without wrap-around, whereby soiling of the contact roller should be avoided.

The above object is achieved by a receiving means for receiving film material with the features of independent claim 1 as well as by a method with the features of independent claim 2 and by a device with the features of independent claim 11 as well as by a Film production device with the features of independent claim 17. Further features and details of the invention emerge from the respective subclaims, the description and the drawings. Features and details that are described in connection with the device according to the invention naturally also apply in connection with the method according to the invention, the receiving means according to the invention and the film production device according to the invention, and vice versa, so that with regard to the disclosure of the individual aspects of the invention, reference is or can always be made to each other.

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 in such a way that the surface area can be placed on a transport device of the winding machine and the film material can be received on the surface area.

In particular, the receiving means, preferably the surface area, can be wrapped around the outside with film material. For this purpose, the film material is transported, for example, in particular in the form of a film web and/or as endless material, by a transport device of the winding machine. As soon as a beginning of the film material runs into a contact point (receiving point) of the receiving means with the transport device, the beginning of the film can adhere to the receiving means and is taken along by it and thus wound onto the receiving means in particular without wrapping.

It is provided that the surface area of the receiving means at least partially has an outer adhesive layer for contacting the film material, in particular to enable adhesion of the film material to the receiving means for winding (and thus also for receiving or winding up). The adhesive layer has an average thickness of a maximum of 2000 µm in order to To preserve the structure of the surface area as far as possible during placement and/or after placement on the transport device.

This can prevent parts of the receiving means from coming loose when the receiving means is placed on the transport device due to the adhesion of an adhesive layer to the transport device and thus contaminating the transport device.

The receiving means can be designed, for example, as a sleeve for the winding machine, in particular as a cardboard sleeve. When the receiving means is placed on the transport device, the structure of the surface area of the wall can be impaired, for example, by components of the receiving means, such as the outer cardboard layers (cardboard plies), becoming at least partially detached. Due to the reduction in the average thickness of the adhesive layer, however, the adhesion, in particular stickiness or adhesive force, can be reduced in such a way that the structure of the surface area is largely retained and/or no detrimental contamination of a surface of the transport device, in particular a contact roller, occurs when it is placed on. A further advantage for the roll change arises in particular from the fact that the receiving means can be prepared automatically with an adhesive to form the outer adhesive layer. The adhesive layer preferably comprises all adhesive areas on the surface area and/or on the receiving means. The remaining areas or areas of the surface area outside the adhesive layer are preferably free of adhesive and/or contact-free. Contact-free means that these areas only come into contact with the environment (ambient air) (and therefore no adhesive layer) and accordingly form the outermost layer or surface of the receiving medium. This surface or outermost layer is formed in particular by the outer area (outside) of the wall, with the inside of the wall preferably forming the storage area. The wall, in particular the outer wall and/or the surface area, preferably comprises paper and/or cellulose and/or sometimes also plastic and/or metal.

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

The adhesive and/or the adhesive layer with the adhesive can preferably comprise a hot melt adhesive which can be applied to the receiving means, for example by spray application. The adhesive can further have, for example, a viscosity of substantially 4400 MPas (millipascal second) (at 150°C degrees Celsius) and/or of substantially 1500 MPas (at substantially 175°C) and/or a density of substantially 0.97 g/cm ³ (at approximately 23°C).

Furthermore, the adhesive is suitable for a processing temperature which is in the range of 100°C to 250°C, in particular 140°C to 170°C. In this way, an adhesive layer can be produced which has such a low stickiness that when the receiving means with the adhesive layer is placed on the surface of the transport device, no significant detachment of parts of the receiving means occurs.

In a measure improving the invention, the average thickness of the adhesive layer can be a maximum of 1000 µm or a maximum of 700 µm or a maximum of 300 µm and/or in the range from 5 µm to 300 µm, preferably 100 µm to 200 µm, with the inside of the adhesive layer in particular contacting the wall and the outside of the adhesive layer and/or the surface areas without an adhesive layer being designed without contact. 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. The receiving medium and/or the adhesive layer is thus designed without adhesive tape, so that no manual application of an adhesive tape to the receiving medium is necessary. The inside of the adhesive layer is formed on the inside, i.e. in the direction of the wall, preferably in contact with the wall, since the application of the adhesive preferably takes place directly on the surface area of the wall. In a When the receiving means prepared with adhesive is placed (applied) onto the transport device, the receiving means comes into contact with the surface of the transport device, i.e. in particular the outside of the adhesive layer comes into contact with the surface of the transport device. This means that when the film material is transported further through the transport device, the film material can be wound up in a simple manner due to the adhesion to the adhesive layer.

It is also conceivable that the receiving means is designed as a sleeve, in particular for a winding unit designed as a winding shaft or as a clamping head. The wall can have the storage area on the inside and the surface area on the outside, with the entire outer surface of the receiving means, in particular the surface area, preferably having at least 40% or at least 70% or at least 90% or at least essentially 100% of the adhesive layer. The surface area can preferably be designed to be adhesive-free only in an edge area. It can also be provided that the surface area has an adhesive image that was applied by an application device of the winding machine. Applying the adhesive to the receiving means as large or as full-surface as possible has the advantage that there is a sufficient area for adhesion to the film material.

1. A. Anbringen wenigstens eines Aufnahmemittels an eine Wickeleinheit, insbesondere innerhalb der Wickelmaschine,
2. B. Automatisiertes Präparieren des Aufnahmemittels mit einem Klebemittel, insbesondere einem Schmelzklebstoff, durch mindestens eine Auftragsvorrichtung, vorzugsweise zur Ausbildung einer Klebemittelschicht, bevorzugt innerhalb der Wickelmaschine,
3. C. Aufsetzen des mit Klebemittel präparierten Aufnahmemittels auf die Transportvorrichtung, um ein Aufnehmen des Folienmaterials von dem Aufnahmemittel zu ermöglichen.

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:

1. A. Attaching at least one receiving means to a winding unit, in particular within the winding machine,
2. B. Automated preparation of the receiving means with an adhesive, in particular a hot melt adhesive, by at least one Application device, preferably for forming an adhesive layer, preferably within the winding machine,
3. C. Placing the receiving means prepared with adhesive onto the transport device to enable the film material to be picked up from the receiving means.

The method according to the invention thus brings with it the same advantages as have been described in detail with reference to a receiving means according to the invention. In addition, a receiving means according to the invention can be used for the method according to the invention.

The method according to the invention enables in particular an automated roll change with a wrap-free winding and/or a straight-edge cut, in particular with an automated preparation of the receiving means, in particular a sleeve. Preparation is understood in particular to mean the (automatic) application of the adhesive, in particular a sprayable adhesive, to the outer surface of the receiving means. The preparation is preferably carried out by an application device which is arranged inside the winding machine. The prepared receiving means is in particular free of adhesive tape, so that the effort for manually applying the adhesive tape when changing the roll is reduced. This also enables the receiving means prepared with adhesive to be placed preferably directly on the transport device without the transport device becoming dirty due to loose parts or the structure of a surface area of the receiving means. After placement according to step C, the film material, in particular the film tape, can be picked up by the receiving means, in particular without wrap-up. For this purpose, a film start is preferably transported into the nip (pick-up point or contact point of the transport device with the prepared pick-up means). As soon as the film start touches the prepared pick-up means, the film material or the film start adheres to the adhesive and is carried along by it. This causes the film material to be wound or wound up on the pick-up means. The method according to the invention enables this winding in particular without the film material being lifted off the transport device, in particular a contact roller. Automated preparation with the adhesive can also be carried out, so that no expensive and complex adjustments of the sleeves used have to be made. The mounting of the receiving means prepared with adhesive onto the transport device is preferably carried out without film, i.e. there is no film at all between the prepared receiving means and the transport device when it is mounted. It is also conceivable that a receiving means with a sufficiently strong wall and/or an adhesive adapted in such a way is used for the method according to the invention, so that the structure of the surface area is largely retained when it is mounted and/or after it is mounted on the transport device, i.e. in particular that essentially no upper layers of the receiving means, in particular cardboard layers, come off. This procedure also has the advantage that no manual intervention is necessary in steps B and C and thus the roll change is carried out in a completely automated manner.

Advantageously, within the scope of the invention, it can be provided that during or after step C, the film material, in particular during further transport through the transport device, is taken up by the receiving means, in particular a sleeve, and/or wound up essentially without wrapping. This is made possible in particular by the prepared receiving means being placed directly on the surface of the transport device without film material being located at the contact point. This improves the quality of the film roll, i.e. the receiving means with already wound-up film material.

The receiving means according to step C is placed directly on the transport device, in contact with the transport device.

It is also conceivable that the receiving means at least partially contacts the film material, in particular the beginning of the film, when it is placed on. To this end, the placing must be coordinated in such a way that the placing, i.e. the simultaneous contact of the receiving means with the transport device and/or with the film material or the beginning of the film, takes place at the time the beginning of the film enters the nip. The placing thus takes place with simultaneous contact between the transport device and the beginning of the film or alternatively exclusively when contacting the transport device without contacting the film material.

It can also be provided within the scope of the invention that the placement of the receiving means on the transport device, in particular a contact roller, according to step C takes place essentially (i.e. also completely) without contact with the film material. In other words, the area between the transport device and the receiving means is essentially free of film material when it is placed on. The contact roller is designed in particular as a VSK roller (vacuum cutting contact roller) in order to enable a better cut to produce the (new) beginning of the film when changing the roll.

It is also conceivable that the preparation of the receiving means takes place as a large-area, in particular full-area, application of the adhesive, in particular such that a thin layer of adhesive at least predominantly or completely covers a surface area, in particular a lateral surface, of the receiving means. The large-area preparation can preferably take place by automated spraying or wetting of the surface of the receiving means with the adhesive. In the case of full-area preparation, essentially the entire surface (lateral surface or surface area) of the receiving means is provided with adhesive.

This allows the film material to be reliably picked up by the receiving means according to step C.

According to a further advantage, it can be provided that the adhesive, in particular an adhesive layer, has an average thickness of a maximum of 2000 µm or a maximum of 1000 µm or a maximum of 700 µm or a maximum of 300 µm. Furthermore, the average thickness can also be in a range of 2 µm to 2000 µm and/or 5 µm to 300 µm and/or 100 µm to 200 µm. The low thickness preferably results in less stickiness in order to avoid parts of the receiving means coming off when it is put on in step C and thus to prevent contamination of the transport device. The average thickness is determined in particular by taking into account all thicknesses of the entire adhesive layer on the receiving means.

Furthermore, it is conceivable within the scope of the invention that, according to step B for preparation, 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 means or the surface area is omitted during application. In this case, a defined edge distance of each start and end of the receiving means (i.e. in particular the opposite side areas) can preferably be left free of adhesive and/or omitted during application. The preparation area corresponds in particular to the area in which winding or winding with film material takes place. In this case, the edge area can be designed as a defined edge area, preferably in the side area of the receiving means (i.e. for example in the area of the sleeve start and end), particularly preferably free of adhesive. This ensures an optimal result when winding.

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

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

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

It is also conceivable within the scope of the invention that, according to step B for preparation, the adhesive is applied, in particular sprayed, 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, preferably 160°C and 220°C. The adhesive, in particular a hot melt adhesive, can thus be applied in the hot state to the adhesive surface, i.e. to a surface area of the receiving means, according to step B. The adhesive can be in the unheated state before application, for example as granules or as powder or as film or as rods or in block form, wherein the application device heats the adhesive shortly before application. Heating takes place, for example, to a temperature in the range of 150°C to 200°C, preferably essentially 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 causes the adhesive to melt, which is then mixed with hot air (for example with an air temperature in the range of 180 °C to 220 °C) in the application head of the application device for spraying. This allows a The adhesive is sprayed evenly to form the adhesive layer on the receiving medium as per step B.

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

It is also conceivable that when the prepared receiving means is placed on the transport device according to step C, the film material, in particular completely and/or at least in the area of a film start, contacts the surface of the transport device, wherein in particular the placement of the receiving means for the receiving means takes place without detachment. The term detachment-free in this context refers to the fact that the structure of a surface area of the receiving means is largely retained when it is placed. In particular, the film web in the area of the film start does not have to be lifted off the surface of the transport device in order to place the prepared receiving means on the transport device for winding. This has the advantage that winding can take place without wrapping. Another advantage is that the film layers of the finished roll are not accidentally stuck together.

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 in such a way that before or during or after step C the film material is severed at a separation point of the film material, the film material remaining on the transport device forming a film start at the separation point, and preferably subsequently and/or after the first receiving means has been placed in place 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 wind the film material onto the first receiving means. The winding is brought about in particular by the first receiving means being prepared with adhesive which causes the film start to adhere to the receiving means. The film material can then be wound onto the first receiving means in particular by rotating the first receiving means. The first receiving means is preferably a receiving means according to steps A to C, while the second receiving means can be processed in the same way according to steps A to C or can be designed independently thereof. The first receiving means is thus in particular a new receiving means which is free of film material, and the second receiving means is a film roll which has already been wound up. The separation point is preferably located on the transport device or between the transport device and the second receiving means. Due to the cutting of the film material, which is carried out in particular by a cutting device, the film material is preferably divided into two parts. A first part remains on the second receiving means and a second part remains with the beginning of the film on the transport device. The beginning of the film is in particular the area which first reaches the contact point during the further transport of the film material on the transport device and thus contacts the first receiving means. This enables a quick and reliable roll change to be carried out.

Furthermore, it can be provided that a further, in particular second, receiving means is provided, which has wound-up film material that is connected to the film material on the transport device in a uniform and/or one-piece and/or monolithic manner, wherein for the roll change, in particular during or before step C, the film material is severed on the transport device in order to break the connection. The severing is preferably carried out by a cutting device that is arranged in the area of the transport device. The roll change can thus be automated and carried out with little effort.

It can also be provided that the film material is picked up by the pick-up means in such a way that the pick-up and/or winding and/or winding of the film material can be carried out both clockwise and anti-clockwise, which in particular makes it possible to reverse the direction of rotation. An automated roll change can thus be carried out in both directions of rotation, whereby the transport device can be rotated both clockwise and anti-clockwise about the axis of rotation during winding. Picking up the film material, i.e. contacting the beginning of the film with the pick-up means (in particular with the first pick-up means), can thus take place in particular from two different sides.

It may also be possible for the film material to be severed for the roll change using a cutting device with a straight edge, in particular using a cutting knife, and/or at an angle, in particular using 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 a straight edge cut in particular.

It can also be provided that a cutting device with a scraper is provided, which is arranged in particular outside the transport device. The scraper and/or the cutting device is preferably arranged or fastened outside the transport device on a frame of the transport device or the device according to the invention. The transport device preferably has a groove, which is particularly preferably designed to be spiral-shaped or spiralized. In particular, to cut through the film material, the scraper can move on or in this groove, in particular axially to the transport device (in particular parallel to the axis of rotation of the transport device). Since the scraper pulls axially to cut through, the groove on the transport device, in particular a contact roller, is preferably at least partially spiral-shaped (or spiralized) and/or runs unevenly on the transport device surface. The scraper can, for example, in particular synchronized with the rotation or web speed, during rotation of the transport device for cutting into the groove, wherein the groove is preferably incorporated into the transport device.

It can further be provided that according to step A at least two receiving means are attached to the single winding unit, wherein in particular a sensor device is provided, and the sensor device preferably detects the distance between the adjacent receiving means and/or the distance between preparation areas of the receiving means during or before step B, in order in particular to exclude the detected distance from application of adhesive according to step B. The at least two or three or four receiving means are thus arranged next to one another, for example along a rotation axis of the winding unit, wherein preferably a defined distance is provided between the adjacent receiving means. This allows several receiving rolls to be wound up and/or prepared with adhesive on a single winding unit at the same time. Since the distance or the gap between the receiving means should not be prepared with adhesive, since no receiving means is provided here, this distance in particular is detected by sensors or sensor elements of the sensor device and accordingly the gap is not prepared or sprayed with adhesive. Furthermore, it is also conceivable that a preparation area is detected by the sensor elements of the sensor device, whereby only the preparation area is prepared with adhesive and, for example, an edge area of the receiving means, which can also include the distance between the receiving means, is excluded from the adhesive. The sensor device can also comprise sensor elements for detecting further parameters, such as a diameter of the receiving means with the film material, in order to detect, for example, whether a desired length of film has been wound onto the receiving roll and, if necessary, to trigger an automatic roll change in the continuous process. The automated roll change comprises, for example, cutting the film material transversely to the running direction, in particular by a cutting device, and initiating winding on a new (first) receiving means in accordance with steps A to C.

Furthermore, it is conceivable that a control device and/or a drive unit can position the receiving means relative to the application device or vice versa. is controlled, in particular depending on the detection of the sensor device, preferably coordinated with other process parameters, in particular a rotational speed of the winding unit and/or a movement speed of the application device. It may be possible for the control device to be coordinated with at least one of the following process parameters or to control the process parameters at least partially directly: generation of overpressure and/or underpressure on the transport device, positioning of the receiving means, positioning of the application device, rotational speed of the transport device, rotational speed of the winding unit, position of the start of the film. 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 also be provided. This ensures optimal coordination of the automatic roll change.

• wenigstens eine Wickeleinheit zur Aufnahme wenigstens eines Aufnahmemittels,
• wenigstens eine Auftragsvorrichtung zum automatisierten Präparieren des Aufnahmemittels mit einem Klebemittel, insbesondere einem Schmelzklebstoff,
• eine Transportvorrichtung zum Transport von Folienmaterial, wobei das mit Klebemittel präparierte Aufnahmemittel derart auf die Transportvorrichtung aufsetzbar ist, dass ein Aufnehmen des Folienmaterials von dem Aufnahmemittel durchführbar ist.

A device for carrying out an automated roll change is also protected. The device according to the invention has

• at least one winding unit for receiving at least one receiving means,
• at least one application device for the automated preparation of 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 the film material can be picked up by the receiving means.

A device according to the invention thus brings with it the same advantages as have already been described in detail with reference to a method according to the invention and a receiving means according to the invention. Furthermore, the device according to the invention can be suitable for being operated according to a method according to the invention. A receiving means according to the invention is used for the device according to the invention.

The inventive The device is preferably a winding machine, in particular for cast film and/or blown film. The device according to the invention is preferably suitable for winding up continuous material.

Furthermore, within the scope of the invention, it can be provided that the application device has an application head arranged in the region of the winding unit, in particular a spray head, in particular for spraying a large area of the surface of the receiving means, wherein in particular the application device is designed to be displaceable essentially parallel to a rotation axis of the receiving means. 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, in particular depending on measured values of a sensor device. This enables optimal automation of the roll change.

According to a further advantage, it can be provided within the scope of the invention that the application device and/or the winding unit are attached to a mechanical drive unit in order to adjust a distance between the application device and the winding unit and/or the receiving means by positioning, wherein the drive unit is preferably provided on at least one side area 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 can be provided which holds the application device and/or the winding unit. In this case, a detachable or non-detachable attachment of the application device and/or the winding unit to the holding device and/or the drive unit and/or the device according to the invention can be possible. This enables reliable automated roll changing.

It can also be provided within the scope of the invention 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 a defined application of the adhesive to the surface area of the receiving means, in particular also of an adhesive image.

Furthermore, within the scope of the invention, it can be provided that at least one line element, in particular an adhesive and/or air line element, in particular a heating hose, is connected to the application device, wherein the line element is designed to be particularly heat-resistant and/or flexible in order to guide the adhesive and/or heated air to the application head. Furthermore, a separate air-conducting line element can preferably be connected to the application device. In this way, reliable transport of the heated adhesive and/or the heated air within the application device to the application head can be carried out. The line elements are designed as hoses, for example, and/or, due to their flexibility, enable the application head to move relative to the transport device.

Advantageously, it can be provided that the line element is heat-resistant up to at least 300°C, preferably up to at least 200°C, and/or essentially up to at least 160°C, and is in particular designed as a plastic hose. This enables the adhesive to be applied reliably to the receiving means.

Optionally, it can be provided that the application device is arranged displaceably on a guide which extends at least along the winding unit in order to enable the adhesive to be applied, in particular completely, to the receiving means. It can therefore be possible for the guide to extend along at least the entire length of the winding unit, for example in the direction of a rotation axis of the winding unit. The guide can be connected, for example, to a drive unit and/or to a holding device of the device according to the invention. This makes it possible to reliably produce a large-area layer of adhesive on the receiving means.

Furthermore, it can be provided that the application device has at least one sensor device with at least one sensor element, wherein the sensor element is aligned with the winding unit and is designed in particular as a distance sensor in order to carry out and/or detect and/or recognize and/or control positioning on the receiving means. Furthermore, the sensor element can be designed, for example, as a light sensor for measuring distance.

For this purpose, the sensor element can also have a transmitting and/or receiving element, for example, in order to detect reflected light. The sensor element can also be designed in such a way that a distance between receiving means arranged adjacently on the winding unit (i.e. a gap or distance between the receiving means) is detected. This allows for optimal automation.

It is also conceivable that the transport device has a non-stick coating, in particular to preserve the structure of a surface area of the receiving means placed on the transport device as far as possible. This ensures that the adhesive applied to the receiving means does not detach from the surface area and thus does not stick to the transport device.

It can also be provided that the transport device for generating overpressure and/or underpressure has at least one opening which, when the film material is placed on top, can be arranged below the film material in such a way that the film material can be sucked in and/or pushed off by the transport device. The openings can, for example, be fluidically connected to a flow machine, in particular 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 sucked in by the cutting device, for example during a cutting process, and pushed off, for example during winding, in order to support the automated roll change. The control of the flow machine can, for example, be automated 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 beginning of the film.

Furthermore, it can be provided that a cutting device is provided for severing the film material, and in particular the transport device has a gap which extends in particular along the axis of rotation of the transport device, wherein preferably the cutting device for severing through the gap is extendable. The cutting device and/or the gap has an extension which is, for example, essentially 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 may be possible that in the normal state the cutting device is completely retracted into the transport device and only extends to cut the film material when a roll change is carried out. The cutting process can be controlled, for example, by a control device and monitored by a sensor device.

It can also be provided that at least one positioning sensor is provided immediately adjacent in the area of the transport device and the receiving means in order to detect the position of the receiving means on the transport device. The positioning sensor can be designed, for example, as a distance sensor or have further sensors, such as cameras or the like. If necessary, a first or second drive unit can also be provided in order 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.

It is also conceivable that a positioning sensor and/or a sensor device is connected directly or indirectly electrically and/or wirelessly to a control device for positioning the receiving means on the transport device, in particular for placing it on the transport device, in order in particular to bring about the placing essentially at the time at which the beginning of the film of the film material on the transport device contacts the receiving means when it is placed on. In this way, on the one hand, contamination of the transport device is prevented and, in addition, winding up without wrapping is possible if necessary. Since preferably only the beginning of the film of the film material contacts the receiving means, and the beginning of the film in particular comprises the entire separation area of the film material at a separation point which is created by the cutting device during the cutting process, there is therefore in particular no protrusion of the film material on the receiving means which would prevent winding up without wrapping. In other words, the film material is in the position when it is placed on and/or Contact of the receiving means on the transport device and/or the film material only on one side of the receiving means resting on the transport device.

Furthermore, it can be provided that a sensor device and/or a positioning sensor is connected to the application device directly or indirectly electrically and/or wirelessly in order to carry out the automated preparation depending on the position of the receiving means 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.

The invention also relates to a film production device, in particular for producing cast or blown film, which is preferably designed as a blown film system or as a cast film system. The film production device according to the invention is particularly suitable for being operated 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, an 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 can be transported by a transport device as a continuous material, for example. The film production device according to the invention thus brings with it the same advantages as have been explained in detail with reference to a device according to the invention and/or a method according to the invention and/or a receiving means according to the invention.

Fig. 1

eine perspektivische Ansicht auf ein erfindungsgemäßes Aufnahmemittel,

Fig. 2

eine vergrößerte Ansicht einer Klebemittelschicht auf einer Wandung des erfindungsgemäßen Aufnahmemittels,

Fig. 3

eine perspektivische Ansicht auf zwei benachbart auf einer Wickeleinheit angeordnete Aufnahmemittel,

Fig. 4

eine perspektivische Ansicht auf eine erfindungsgemäße Vorrichtung, insbesondere als Teil einer erfindungsgemäßen Folienproduktionsvorrichtung,

Fig. 5

eine Seitenansicht auf eine erfindungsgemäße Vorrichtung,

Fig. 6

eine Anordnung einer erfindungsgemäßen Vorrichtung,

Fig. 7

eine vergrößerte Ansicht von Teilen einer erfindungsgemäßen Vorrichtung,

Fig. 8 bis 14

Seitenansichten auf eine erfindungsgemäße Vorrichtung zur Visualisierung eines erfindungsgemäßen Verfahrens,

Fig. 15

Visualisierung von Verfahrensschritten eines erfindungsgemäßen Verfahrens.

Further advantages, features and details of the invention emerge from the following description, in which embodiments of the invention are described in detail with reference to the drawings. They show schematically:

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 adjacently 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,

Fig. 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 process according to the invention.

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

In Fig. 1 a receiving means 200 according to the invention is shown schematically in a perspective view. A wall 220 can be seen, which is in particular hollow-cylindrical and has an inner side and an outer side. The inner side forms a storage area 210 for attaching the receiving means 200 to a winding unit 20 of a winding machine 10. The winding unit 20 is designed, for example, as a winding shaft and can in particular be inserted into the receiving means 200. The storage area 210 thus makes direct contact with the winding unit 20 and enables, for example, a rotationally fixed and/or immovable storage of the receiving means 200 on the winding unit 20 in order to also enable rotation of the receiving means 200 when the winding unit 20 rotates. Alternatively, a rotatable mounting of the receiving means 200 on the winding unit 20 can be provided. The outer region of the wall 220 comprises a surface region 230 of the receiving means 200. This receiving region 230 as the outer surface of the receiving means 200 is suitable for receiving or winding up film material 250. In Fig. 1 the wound-up film material 250 can be seen, which is, however, only taken up by a partial area of the surface area 230. This area corresponds, for example, to a preparation area 231, which is provided 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.

Fig. 2 shows an enlarged 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 means 200. An average thickness D of the adhesive layer 235 is also marked. The greatest thickness of the adhesive layer 235 and the smallest thickness of the adhesive layer 235 can deviate from the average thickness D by a maximum of 50% or by a maximum of 30% or by a maximum of 10%, for example.

Fig. 3 shows a schematic perspective view of two receiving means 200, wherein a first receiving means 200a is arranged adjacent to a second receiving means 200b on a winding unit 20. Both receiving means 200 according to the invention are mounted on the winding unit 20 in a storage area 210, either movably or immovably. The winding unit 20 is preferably mounted rotatably in order to cause rotation of the receiving means 200, which is connected to the winding unit 20 in a rotationally fixed manner. The two receiving means 200 according to the invention are arranged on a common winding unit 20, wherein a distance or a gap can be seen between the first receiving means 200a and the second receiving means 200b. This gap is optionally excluded from the automated preparation of the receiving means 200 with an adhesive 234. It is also conceivable that an edge region 232 is excluded from the preparation and is thus free of adhesive after the preparation. Thus, the adhesive is preferably applied exclusively in an automated preparation Preparation area 231 of the receiving means 200 or the receiving means 200 or exclusively in a defined area according to an adhesive image 233.

In Fig. 4 a device 10 according to the invention is shown schematically, which is, for example, part of a film production device 100 according to the invention, in particular for producing cast or blown film. The device 10 according to the invention comprises at least one winding unit 20 for receiving at least one receiving means 200 and at least one application device 40 for automatically preparing the receiving means 200 with an adhesive 234. The device 10 according to the invention also comprises a transport device 30, which is designed, for example, as a contact roller 30 and is designed to transport film material 250. The transport device 30 can, for example, be designed as a VSK roller and, for example, have several openings 35, which serve to generate a negative pressure or positive pressure. In addition, a gap 36 can be provided along a rotation axis R, through which a cutting device 37 can be extended.

In Fig. 5 a side view of a device 10 according to the invention is shown. The transport device 30, which is mounted so as to be rotatable about an axis of rotation R, can be seen. It can also be seen that film material 250 is wound onto a receiving means 200 according to the invention, in particular a second receiving means 200b on a second winding unit 20b. This creates a film roll which, when the desired film length is reached, is replaced with a new receiving means 200, in particular a first receiving means 200a, by an automated roll change. The first receiving means 200a is attached to a first winding shaft 20a for this purpose in order 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, for example, on a guide 55 and/or is moved by a drive unit 50, for example along the axis of rotation R.

Fig. 6 serves to illustrate a structure of a device 10 according to the invention and the integration of the device 10 according to the invention into a film production device 100. The film production device 100 can be used, for example, as a casting or Blown film system, wherein the films produced are transported to the device 10 according to the invention, in particular a winding machine 10, for winding onto the receiving means 200 according to the invention. To carry out an automated roll change, a control device 70 of the device 10 is provided, which is also connected, for example, 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.

In Fig. 7 an enlarged view of parts of a device 10 according to the invention, in particular an application device 40, is shown. 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, with a heated adhesive 234 being transported to the application head 41 through line elements 45. In order to follow the movement, the line element 45 is in particular flexible and/or designed as a hose. To monitor 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, for example, which preferably has at least one sensor element 61 or at least one distance sensor 61.

In the Figs. 8 to 14 a side view of parts of a device 10 according to the invention is shown, wherein a transport device 30 is shown, which is mounted so as to be rotatable about a rotation axis R. Furthermore, a further roller 38, in particular a support roller 38, is 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 means 200b on a second winding unit 20b and the wound-up film material 250. In addition, an application head 41 for spraying the receiving means 200 according to the invention with an adhesive 234 can be seen. In the area of the application head 41, a first receiving means 200a is arranged on a first winding unit 20a.

According to Fig. 8 First, 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 means 200a moves with the first winding shaft 20a into the gluing position. According to Fig. 10 The first receiving means 200a is then prepared automatically with the adhesive 234 in order to form an adhesive layer 235 on the first receiving means 200a. During the application of the adhesive 234, the first winding unit 20a rotates together with the first receiving means 200a. After the desired area has been provided with adhesive 234, the first winding unit 20a is connected to the first receiving means 200a in accordance with Fig. 11 brought into a waiting position and the film web 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.

According to Fig. 12 The first receiving means 200a, prepared with adhesive 234, is now placed on the transport device 30 in order to enable the film material 250 to be picked up by the receiving means 200. The beginning 251 of the film material 250 is transported on the transport device 30 in the direction of the first receiving means 200a. The placement of the first receiving means 200a or the receiving means 200 and the movement of the winding unit 20 or the first winding unit 20a required for this is coordinated and controlled, for example, by a control device 70, possibly using a sensor device 60.

According to Fig. 13 The finished film roll, i.e. the second winding unit 20b, is then removed from the transport device 30 with the second receiving means 200b and the winding of the first receiving means 200a takes place. According to Fig. 14 The new, first winding unit 20a with the new, first receiving means 200a is now brought into the home position, i.e. into the position previously occupied by the second winding unit 20b. This completes the automated roll change.

In Fig. 15 schematically show process steps of a process 300 according to the invention. In a first process step 301, the receiving means 200 is prepared automatically with an adhesive 234. In a second process step 302, the receiving means 200 prepared with adhesive 234 is placed on the transport device 30 in order to enable the film material 250 to be picked up by the receiving means 200.

list of reference symbols

10

device, winding machine

20

changing unit

20a

first changing unit

20b

second changing unit

30

transport device

35

openings

36

gap

37

cutting device

38

platen roller

40

application device

41

application head, spray head

45

line 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

recording medium

200a

first recording medium

200b

second recording medium

210

storage area

220

wall

230

surface area, lateral surface

231

preparation area

232

peripheral area

233

sticker

234

adhesives

235

adhesive layer

250

foil material

251

separation point, beginning of the film

300

Proceedings

301

first procedural step

302

second procedural step

D

thickness of the adhesive layer

R

axis of rotation

Claims (17)

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.

Images