DE102023105238B3 - Application device for the application of web-shaped adhesive elements - Google Patents

Abstract

The invention relates to an application device (10) for the application of web-shaped adhesive elements (12), comprising: i) a first roller receptacle (14), the first roller receptacle (14) being set up to be filled with a web-shaped adhesive element (12). Adhesive tape roll (16) can be rotatably arranged in the first roll holder (14), ii) a rotatable pre-feed roll (18), and iii) a rotatable application roll (20), the application roll (20) being on the lateral surface (22) along the Has circumferentially circumferential recess (24), wherein the application device (10) is set up so that a web-shaped adhesive element (12) provided by an adhesive tape roll (16) arranged in the first roll holder (14) is fed via the pre-feed roller (18) to the application roll (20 ) can be guided, the application roller (20) and the pre-conveyor roller (18) being coupled to a first coupling mechanism (26), so that a rotation of the application roller (20) causes a rotation of the pre-conveyor roller (18).

Description

The invention relates to an application device for the application of web-shaped adhesive elements and a corresponding method for applying web-shaped adhesive elements with a corresponding application device.

Joining separate elements is one of the central processes in manufacturing technology. In addition to other methods such as welding and soldering, gluing, i.e. joining using an adhesive, is particularly important today. An alternative to the use of formless adhesives, which are applied from a tube, for example, are so-called adhesive tapes, the adhesive effect of which is based on the adhesive masses used. The use of adhesive tapes is associated with many advantages that make this technology ideal for use in many branches of industry, for example in the electronics or automotive industries.

So-called pressure-sensitive adhesive tapes are particularly relevant for many applications, in which a pressure-sensitive adhesive ensures the adhesive effect, which is permanently sticky and adhesive under normal environmental conditions. Corresponding pressure-sensitive adhesive tapes can be applied to a substrate by pressure and remain stuck there, but can later be removed more or less without leaving any residue.

So-called double-sided adhesive tapes, which are designed to be sticky, in particular pressure-sensitively adhesive, on both sides have proven particularly useful for joining two separate elements to an adhesive surface. Such double-sided adhesive tapes are known to those skilled in the art in many designs and can, for example, comprise a carrier which is equipped on both sides with an adhesive or can also be designed without a carrier as so-called transfer tapes. These double-sided adhesive tapes can, for example, be applied to a surface to be glued in order to then position a second element on the adhesive surface thus formed.

To improve the handling properties of such double-sided adhesive tapes and to ensure sufficient unrollability, a separating layer, which is also referred to as a separating liner, is usually applied to at least one side of the adhesive tape. This separating layer, which regularly shows low adhesion to the covered PSA, for example as a result of a siliconized surface, can be removed, for example, after application of the adhesive tape in order to expose the second sticky side of the adhesive tape.

Corresponding double-sided adhesive tapes are known from everyday life, whereby the application is regularly carried out manually and using mostly rudimentary tools, in particular cutting tools. However, manual application of double-sided adhesive tapes has proven to be too inefficient or too error-prone for many industrial applications. Against this background, application devices were developed with which double-sided adhesive tapes can be applied to substrates to be glued as reliably and reproducibly as possible. These application devices are often not only designed so that they can apply the web-shaped adhesive element to a substrate, but in many cases also promote or cause the separation liner positioned on the adhesive element.

In industrial production, in addition to classic double-sided adhesive tapes, web-shaped adhesive elements are also used, which are specifically tailored to certain applications in terms of their handling and/or adhesive properties. Such specialized web-shaped adhesive elements include, for example, adhesive tapes whose adhesive is in the form of a foam, for example as a foamed (meth)acrylate-based adhesive. Corresponding adhesive tapes with foamed adhesives have particularly advantageous adhesive properties in combination with favorable mechanical properties for many applications.

A special type of adhesive tapes, which are based on foamed adhesives, have a passivating layer, for example made of polyurethane, on one side of the adhesive layer instead of a classic release liner, which reduces the stickiness of the corresponding surfaces. This results in an easy-to-handle adhesive tape, even without use, which can be arranged on a release liner with the open adhesive layer on the non-passivated side and is therefore not or only slightly sticky on both sides. When applying corresponding adhesive tapes, the release liner covering the non-passivated side is removed and the web-shaped adhesive tape is applied with the exposed side to a substrate. Corresponding adhesive tapes with a foamed adhesive and a passivating surface coating, which are also referred to below as passivated, foamed adhesive elements, can be designed so that the adhesive passes through the passivation when pressure is applied, so that the adhesive tape only after such pressure application, especially after a long time, how a double-sided adhesive tape behaves. Such passivated, foamed adhesive tapes are commercially available from various suppliers, for example from the company tesa under the trade name “ACXplus 76730 Box Seal” and are often used for sealing containers, with the advantage that the material connection only occurs over time is formed and the containers can be opened relatively easily immediately after closure. Further information on the use of adhesive elements when sealing containers can be found, for example, in DE102020200450 B4 , the DE 102020200452 A1 and the WO2021144306 A1 disclosed.

An industrial area in which double-sided adhesive tapes in general and passivated, foamed adhesive tapes in particular are regularly used is the vehicle industry. For example, appropriate adhesive tapes are used to seal batteries in vehicles, where they are used in particular to fix battery covers to corresponding battery housings. In this application, there are application advantages, particularly when using passivated, foamed adhesive tapes, whereby pressing the battery cover onto the housing prepared in this way causes or promotes the passage or diffusion of the foamed adhesive through the passivating layer and, over time, a corresponding resilient Connection between the two components results.

Adhesive tapes with foamed adhesives, especially those with a passivating surface coating, are regularly particularly susceptible to mechanical stresses, in particular compression along the thickness as well as tensile stress along the web direction. Accordingly, in practice it is important when applying appropriate adhesive tapes with foamed adhesives, especially if they have a passivating coating, to ensure that the adhesive tape is not stretched too much during application to avoid tearing of the foamed adhesive layer and/or the to prevent the passivation layer arranged on it. In addition, it should be ensured that the application pressure is not too high, so that unwanted compression of the adhesive tape during application can be avoided, which results in local stretching of the passivating layer and can destroy it, even before the desired, controlled pressure application is carried out later, which, for example . can be exerted with a pressure roller, the actual adhesive behavior should be achieved.

In the large-scale industrial production of corresponding vehicle components, for example battery boxes, a sufficiently gentle application can in most cases be guaranteed by using a high degree of automation. The application of corresponding adhesive tapes is carried out by an application device designed as an end effector, which can be attached to a sensor-controlled industrial robot, for example. A corresponding design enables, on the one hand, precise guidance of the application device relative to the substrate, so that excessive compression can be prevented, which would result in an undesirable stretching of the passivating layer. In addition, corresponding application devices often have driven guide elements and rollers, which propel the adhesive tape in the application device and wind up the separated release liner, so that the stretch experienced by the adhesive tape can be controlled so that it remains within a tolerance interval.

Even if the gentle application of corresponding high-performance adhesive tapes in an automated production line is usually unproblematic thanks to modern robot controls, in practice there is a problem that in the event of service or repairs in the workshop it may be necessary to open the containers closed in this way then close again. In smaller companies, however, due to the lack of the necessary equipment, it is usually not possible, for example, to close open battery boxes using an appropriate industrial robot. Rather, the re-application of such adhesive tapes must be carried out by the workers employed without recourse to precisely set automated application devices. For this purpose, so-called hand applicators have been developed in the prior art, in which a corresponding adhesive tape can be provided and which serve the purpose of making the application of adhesive tapes as part of service or repair work in workshops in terms of their time and/or cost efficiency as well as reproducibility to improve the result.

Even though many of the hand applicators known from the prior art achieve good results when processing conventional double-sided adhesive tapes, their suitability for applying pressure and/or stretch-sensitive adhesive tapes, in particular adhesive tapes with foamed adhesives and/or passivation layers, is often perceived as inadequate. Particularly when used by workers who are not specifically trained for this purpose, sol Using hand applicators, when pressed on, the applied adhesive tapes are compressed too much. In addition, in the hand applicators known from the prior art, in the absence of a motor, the unrolling of the adhesive tape from the adhesive tape roll is usually only carried out by pulling, which is caused by the adhesion of the adhesive tape to the substrate to be glued when the hand applicator is guided over the substrate. The force causing the unrolling therefore acts through the adhesive tape and results in an undesirable stretching of the adhesive tape, which poses the risk for many high-performance adhesive tapes that their functionality will be impaired, for example because a passivation layer applied to them is damaged. The hand applicators known from the prior art are therefore found in many cases to be unsuitable for the application of certain high-performance adhesive tapes, in particular passivated, foamed adhesive tapes.

The primary object of the present invention was to eliminate or at least reduce the disadvantages of the prior art.

In particular, the object of the present invention was to provide an application device, in particular a hand applicator, and an application method to be carried out with it for the application of web-shaped adhesive elements, with which the application of web-shaped adhesive elements should be able to be carried out in a particularly time- and / or cost-efficient manner.

It was an object of the present invention that the application device to be specified should be designed in such a way that excessive compression of the adhesive tape during application should be prevented.

In addition, it was an object of the present invention that the application device to be specified should be able to avoid excessive stretching of the adhesive tape during the application process.

In this respect, it was an object of the present invention that the application device to be specified should ensure a particularly high level of process reliability and should enable the application of adhesive elements in a particularly reproducible manner, whereby the requirements for the training and instruction of the workers used should desirably be able to be reduced .

It was a particular object of the present invention that the application device to be specified should be particularly suitable for the processing of modern high-performance adhesive tapes, in particular adhesive tapes with foamed adhesives, especially those adhesive tapes which are provided with a passivating layer at least on one side and as a result only after pressure application on both sides Form stickiness.

It was a further object of the present invention that the application device to be specified should be as robust and error-free as possible and, in particular, should enable the application of adhesive tapes to be as stretch-free as possible, even without drive units such as electric motors.

The inventors of the present invention have now found that the tasks described above can be achieved if an application device for the application of web-shaped adhesive elements is provided, in which a rotatable application roller is provided for the application of the adhesive tape, which has a circumferential recess and which is coupled to a pre-feed roller by a coupling mechanism, so that a rotation of the application roller, such as occurs when rolling over a substrate to be glued, causes a rotation of the pre-feed roller, which can convey the adhesive tape to be applied in the direction of the application roller, as defined in the claims is.

The circumferential recess, for example in the form of a circumferential groove, advantageously ensures that a cavity is created between the substrate to be bonded and the application roller used for application, through which the adhesive tape to be applied can be guided at the moment of rolling. By dimensioning the circumferential recess, it is possible to specify a desired or maximum compression of the adhesive tape, even in the absence of sensors or an automatic control system, knowing the thickness of the adhesive tape to be applied. By coupling the application roller with the pre-feed roller, it is possible for the rotational movement of the application roller carried out when the adhesive tape to be applied is rolled on to be converted into an additional movement of the pre-feed roller, which supports the provision of additional adhesive tape in the direction of the application roller and thus reduces the stretching experienced by the adhesive tape.

The reduction in the stretch acting on the adhesive tape during application that can be achieved by the pre-feed roller can be particularly greatly reduced if the pre-feed roller comes into contact with the release liner arranged on the adhesive tape ted, so that the pre-feed roller exerts a force on the release liner and itself does not cause any additional stretching in the adhesive and/or a passivation layer covering the adhesive. In a particularly advantageous embodiment, this first coupling is combined with a further coupling, so that the rotation of the application roller also causes a rotation of the liner winding, so that this causes a pull on the separating liner separated before application, which additionally advances the adhesive tape through the application device transported and prevents the liner from having to be wound up solely by the tensile force in the adhesive tape.

The above-mentioned objects are thus achieved by the subject matter of the invention, as defined in the claims. Preferred embodiments according to the invention result from the subclaims and the following statements.

Such embodiments, which are referred to below as preferred, are combined in particularly preferred embodiments with features of other embodiments designated as preferred. Combinations of two or more of the embodiments described below as particularly preferred are therefore very particularly preferred. Also preferred are embodiments in which a feature of one embodiment that is designated as preferred to some extent is combined with one or more further features of other embodiments that are designated as preferred to some extent. Features of preferred methods result from the features of preferred application devices.

1. i) eine erste Rollenaufnahme, wobei die erste Rollenaufnahme dazu eingerichtet ist, dass eine mit einem bahnförmigem Klebeelement befüllte Klebebandrolle rotierbar in der ersten Rollenaufnahme angeordnet werden kann,
2. ii) eine rotierbare Vorförderrolle, und
3. iii) eine rotierbare Applikationsrolle, wobei die Applikationsrolle auf der Mantelfläche eine entlang der Umfangsrichtung umlaufende Vertiefung aufweist,

wobei die Applikationsvorrichtung dazu eingerichtet ist, dass ein von einer in der ersten Rollenaufnahme angeordneten Klebebandrolle bereitgestelltes bahnförmiges Klebeelement über die Vorförderrolle zur Applikationsrolle geführt werden kann,
wobei die Applikationsrolle und die Vorförderrolle mit einem ersten Kopplungsmechanismus gekoppelt sind, so dass eine Rotation der Applikationsrolle eine Rotation der Vorförderrolle bewirkt.The invention relates in particular to an application device for the application of web-shaped adhesive elements, comprising:

1. i) a first roll holder, the first roll holder being set up so that a roll of adhesive tape filled with a web-shaped adhesive element can be rotatably arranged in the first roll holder,
2. ii) a rotatable pre-feed roller, and
3. iii) a rotatable application roller, the application roller having a recess on the lateral surface running along the circumferential direction,

wherein the application device is set up so that a web-shaped adhesive element provided by an adhesive tape roll arranged in the first roll holder can be guided via the pre-feed roll to the application roll,
wherein the application roller and the pre-feed roller are coupled to a first coupling mechanism such that rotation of the application roller causes rotation of the pre-feed roller.

The application device according to the invention is used to apply web-shaped adhesive elements, in particular adhesive tapes. The application device according to the invention is particularly suitable for the application of those web-shaped adhesive elements which have a low tolerance against excessive application pressure and/or excessive stretching of the adhesive tape during application, in particular passivated, foamed adhesive tapes.

The person skilled in the art understands that, in order to understand the invention, it is expedient to define and describe the application device with reference to the web-shaped adhesive element to be applied with the application device. At the same time, however, the person skilled in the art also understands that the web-shaped adhesive element itself and the roll of adhesive tape on which the web-shaped adhesive element is provided are not part of the application device according to the invention.

It can be seen as an advantage of the application devices according to the invention that, at least theoretically, they can also be designed as an end effector on an automated movement device, for example a robot arm. In these embodiments, there are advantages in that the use of separate drive units, for example electric motors, can be dispensed with and the control effort can also be reduced, since ensuring correct application pressure to avoid unwanted compression of the adhesive tape can also be achieved with less precise control systems can be implemented. However, an application device according to the invention that is designed for manual use, for example as part of service and/or repair work in a workshop, is particularly advantageous and preferred for essentially all embodiments of the invention. Accordingly, an application device according to the invention is particularly preferred, the application device being a hand applicator. Particularly preferred is additionally or alternatively an application device according to the invention, wherein the application device comprises a handle.

The application device according to the invention comprises a first roll holder. An adhesive tape roll filled with adhesive tape can be inserted into this roll holder, whereby the design of the first roll holder ensures that the adhesive tape roll can be rotated in the application device, for example by a corresponding rotatable bearing. This makes it possible to unwind the web-shaped adhesive element from the adhesive tape roll arranged in the roll holder by pulling on it and to guide it via the other components of the application device to the substrate to be glued.

In addition to the roller holder, the application device according to the invention comprises at least one rotatable pre-feed roller and a rotatable application roller, whereby the application device can also include further guide elements with which a more complex web guidance of the adhesive tape in the application device can be realized. The individual components can expediently be fixed relative to one another on a support plate, and a housing can also be provided. In these cases, it is therefore, for example, an application device according to the invention, wherein the application device additionally comprises one or more further guide elements, preferably guide rollers, for guiding the web-shaped adhesive element and/or the web-shaped separating material. Additionally or alternatively, it is an application device according to the invention, wherein the application device comprises a base plate, the first roller holder, the pre-feed roller and the application roller, as well as optionally the other components of the application device being arranged on the base plate and/or connected to the base plate.

The roll holder, the pre-feed roll and the application roll are arranged in the application device in such a way that the adhesive tape provided by the adhesive tape roll in the roll holder can be guided via the pre-feed roll to the application roll, the arrangement of the elements advantageously being carried out in such a way that the adhesive tape roll provided by the roll of adhesive tape is web-shaped Adhesive elements can be guided with the side over the pre-conveyor roller, which is covered with a web-shaped separating layer, in particular a separating liner, in order to transfer the conveying effect exerted by the pre-conveyor roller to the web-shaped separating layer and to exert as little tension as possible on the adhesive compound present in the web-shaped adhesive element .

The additional conveying effect of the pre-conveyor roller is ensured in application devices according to the invention in that this pre-conveyor roller is coupled to the application roller via a first coupling mechanism, so that a rotation of the application roller causes a rotation of the pre-conveyor roller. This means that the application roller can be rolled over the substrate during application and the resulting rotation via the coupling mechanism causes a rotation of the pre-conveyor roller, which conveys the web-shaped adhesive element in the direction of the application roller.

At least in principle, an improvement can be achieved by using the pre-feed roller coupled to the application roller even if the pre-feed roller contacts the adhesive of the web-shaped adhesive element. However, according to the inventors' assessment, a corresponding design is less preferred, since in this case the pre-feed roller can exert an undesirable stretch on the adhesive layer or any passivation layer present in the web-shaped adhesive element. A more advantageous embodiment results when the pre-conveyor roller is used to achieve the desired conveying effect in the direction of the application roller by acting on the separating liner, i.e. the web-shaped separating material. The separating liner, which is already present in the vast majority of corresponding adhesive tapes, is generally relatively insensitive to tensile forces and makes it possible to guide the more vulnerable parts of the web-shaped adhesive element, in particular a foamed adhesive and a passivating layer arranged thereon, through the application device as gently as possible. Accordingly, it is particularly preferred for essentially all embodiments if the -ultimately necessary- separation of the separating liner in the application device, based on the path of the adhesive tape in the application device, only takes place behind the pre-feed roller. Accordingly, an application device according to the invention is preferred, wherein the application device is set up so that a web-shaped separating material arranged on a web-shaped adhesive element guided in the application device is separated from the web-shaped adhesive element in relation to the course of the web in the application device before the application roller and after the pre-feed roller, preferably on one Separating edge, in particular a knife edge, the web-shaped separating material on the separating edge being deflected relative to the path of the web-shaped adhesive element particularly preferably by 90° or more, preferably by 110° or more.

At least theoretically, it is conceivable to remove the separating liner separated from the web-shaped adhesive element in the application device in a largely uncontrolled manner, for example by dispensing it loosely from the application device. However, according to the inventors' assessment, it is particularly advantageous if the removed separating liner is instead wound up directly on a suitable take-up roll. In this way, the disposal or recycling of the wound separating liner can be made easier.

1. iv.a) eine rotierbare Aufwickelrolle, oder
2. iv.b) eine zweite Rollenaufnahme, wobei die zweite Rollenaufnahme dazu eingerichtet ist, dass eine Aufwickelrolle rotierbar in der zweiten Rollenaufnahme angeordnet werden kann,

wobei die Applikationsvorrichtung dazu eingerichtet ist, dass ein von einem in der Applikationsvorrichtung geführten bahnförmigen Klebeelement separiertes bahnförmiges Trennmaterial auf der Aufwickelrolle aufgewickelt werden kann.According to the inventors' assessment, two different options are particularly suitable for implementing this design. On the one hand, a largely permanently installed rotatable winding roll can be provided in the application device, to which the separating liner detached from the web-shaped adhesive element can be guided. A corresponding structure can be made particularly robust. Alternatively, there is an embodiment in which the application device according to the invention has a second roll holder in which an empty winding roll for winding up the release liner can be arranged in a reversible and non-destructive manner, so that the replacement of a roll completely filled with unwound release liner is particularly easy. An application device according to the invention is therefore preferred, the application device additionally comprising:

1. iv.a) a rotatable take-up roll, or
2. iv.b) a second roll holder, the second roll holder being set up so that a take-up roll can be rotatably arranged in the second roll holder,

wherein the application device is set up so that a web-shaped release material separated from a web-shaped adhesive element guided in the application device can be wound up on the winding roll.

It is at least theoretically conceivable that the winding roller is operated manually at regular intervals in order to wind up the separated separating liner. It is also conceivable, at least in principle, that the winding roller can be set to pretension, for example, and/or exerts a continuous pull via an electric motor, so that a partially automated winding of the separated separating liner occurs. However, according to the inventors' assessment, corresponding configurations are less advantageous because they involve either higher manual effort or increased complexity of the application device or increased energy requirements and potentially increased maintenance effort. Against this background, the inventors propose that the take-up roll can also be coupled to the application roll in a synergistic manner via a second coupling mechanism, so that a rotation of the application roll also causes a rotation of the take-up roll. This results in a particularly advantageous embodiment in which the rotation of the application roller caused by the rolling causes not only a conveying movement of the pre-feed roller, but also a pull on the web-shaped separating material, through which a particularly low-stretch conveying of the adhesive tape through the application device is possible. Particularly preferred is an application device according to the invention, wherein the application roller and the winding roller are coupled to a second coupling mechanism, so that a rotation of the application roller causes a rotation of the winding roller.

In order to further minimize the tensile force experienced by the adhesive tape during application, a drive for the adhesive tape roll used to provide the adhesive tape can additionally or alternatively be added to the first roll holder. This supports the rolling movement and the rotation of the adhesive tape roll in the first roll holder does not have to take place exclusively via the pull on the web-shaped adhesive element or its web-shaped separating material. Here too, it would be at least theoretically conceivable to provide an electric motor that ensures the necessary rotation. However, with this embodiment, the complexity of the application device, its energy requirements and the potential maintenance requirements would be increased in a disadvantageous manner. Accordingly, the inventors propose that any desired drive of the adhesive tape roll in the first roll holder can in turn be carried out in a synergistic manner by a coupling mechanism through which the application roll and the first roll holder can be coupled to one another. For certain applications, in particular when applying particularly stretch-sensitive adhesive tapes, an application device according to the invention is preferred, wherein the application roll and the first roll receptacle are coupled to a third coupling mechanism, so that a rotation of the application roll causes a rotation of an adhesive tape roll arranged in the first roll receptacle.

The person skilled in the art understands that the pre-conveyor roller in application devices according to the invention serves to exert a tensile force on the web-shaped adhesive element or particularly preferably on a web-shaped separating material arranged on the web-shaped adhesive element and that for this it is necessary that between the surface of the pre-conveyor roller and the web-shaped adhesive element or separating material there is a certain amount of friction, which can ensure a corresponding drive. Particularly in application devices according to the invention, in which the pre-conveyor roller engages the web-shaped separating material, which is also kept under tension by a winding roller that is also driven, it is possible in many cases due to the resulting contact pressure of the web-shaped separating material on the pre-conveyor roller, even without further structural design one there to achieve sufficient propulsion with the pre-feed roller.

1. v) eine rotierbare Gegenrolle,

wobei die Gegenrolle mit der Vorförderrolle einen zwischen der Gegenrolle und der Vorförderrolle angeordneten Rollenspalt ausbildet, wobei die Applikationsvorrichtung dazu eingerichtet ist, dass das in der Applikationsvorrichtung geführte bahnförmige Klebeelement durch den Rollenspalt zur Applikationsrolle geführt werden kann. Ganz besonders bevorzugt ist eine erfindungsgemäße Applikationsvorrichtung, wobei die Gegenrolle federgelagert ist, so dass sich der Rollenspalt gegen die Federkraft der Federlagerung aufweiten lässt und/oder sodass die Gegenrolle auf das im Rollenspalt geführte bahnförmige Klebeelement einen vorbestimmten Anpressdruck an die Vorförderrolle ausübt.In order to improve the force exerted by the pre-conveyor roller on the web-shaped adhesive element, a so-called counter-roller can also be provided, so that a gap is formed between the pre-conveyor roller and the counter-roller, through which the web-shaped adhesive element is guided, with a spring-loaded counter-roller in particular being able to press the web-shaped adhesive tape can be realized on the pre-conveyor roller, as a result of which good force transmission from the pre-conveyor roller to the web-shaped adhesive element or separating material can be ensured. According to the inventors, the use of a corresponding counter roller is also advantageous because, apart from any driven liner winding, an advantageous fixation of the web-shaped material inside the application device can be ensured, so that additional stabilization of the guide track of the web-shaped adhesive element in the application device according to the invention is achieved becomes. Accordingly, an application device according to the invention is particularly preferred, the application device additionally comprising:

1. v) a rotatable counter roller,

wherein the counter roller with the pre-conveyor roller forms a roller gap arranged between the counter roller and the pre-conveyor roller, the application device being set up so that the web-shaped adhesive element guided in the application device can be guided through the roller gap to the application roller. Very particularly preferred is an application device according to the invention, wherein the counter-roller is spring-mounted, so that the roller gap can be expanded against the spring force of the spring bearing and/or so that the counter-roller exerts a predetermined contact pressure on the web-shaped adhesive element guided in the roll gap on the pre-conveyor roller.

When using a corresponding counter roller, the inventors believe it is often sufficient if it is mounted so that it can rotate with as little resistance as possible and accordingly leads to as little energy loss as possible when guiding the web-shaped adhesive element. The lack of a drive for the counter roller reduces the energy and maintenance requirements and allows a particularly robust design of the application device.

In those configurations in which the counter-roller - unlike passivated adhesive tapes - attacks an adhesive layer, it is expedient to equip the counter-roller with an adhesion-reduced surface. Particularly in those configurations in which the counter-roller contacts an at least partially sticky surface, the inventors believe it is also expedient to design the counter-roller as a driven roller, whereby a particularly efficient pre-feeding effect can be achieved in an advantageous manner in cooperation with the pre-feeding roller. Even if the use of an electric motor or another drive would be conceivable, at least theoretically, the inventors suggest that a coupling with the application roller can also be used expediently at this point, which can take place via a fourth coupling mechanism. An application device according to the invention is therefore preferred for certain applications, wherein the application roller and the counter-roller are coupled to a fourth coupling mechanism, so that a rotation of the application roller causes a rotation of the counter-roller.

In light of the above statements, it is clear that in addition to the pre-feed roller, the liner winding and/or the adhesive tape roll used for provision and/or the counter-roll can also be driven via a corresponding coupling mechanism. If two or more of the coupling mechanisms are present, it is preferred if these are formed by an overall coupling mechanism, so that the individual components of the application device according to the invention are coupled in series, for example via intermediate wheels, in particular the application roller, the pre-feed roller and the winding roller being advantageously connected to one another can be coupled. Accordingly, an application device according to the invention is preferred, wherein the first coupling mechanism and the second coupling mechanism are formed by an overall coupling mechanism, so that a rotation of the application roller causes a rotation of the pre-feed roller and the take-up roller, the overall coupling mechanism preferably additionally comprising the third coupling mechanism and/or the fourth coupling mechanism includes.

The question of the extent to which a coupling mechanism must maintain or invert the direction of rotation of the respective elements in order to ensure sufficient functionality depends largely on the positioning of the corresponding elements in the application device according to the invention, but can be easily adjusted by the person skilled in the art in view of the invention. According to the inventors' assessment, the direction of rotation in particularly preferred embodiments for the pre-feed roll and the take-up roll will be inverted relative to the application roll, while it would be expedient for the counter roll and the providing adhesive tape roll to be coupled It is less preferred to maintain the same direction of rotation. An application device according to the invention is preferred, wherein the application roller and the pre-conveyor roller are coupled in such a way that a rotation of the application roller causes a rotation of the pre-conveyor roller in the opposite direction of rotation. Additionally or alternatively, an application device according to the invention is preferred, wherein the application roller and the winding roller are coupled in such a way that a rotation of the application roller causes a rotation of the winding roller in the opposite direction of rotation. Additionally or alternatively, an application device according to the invention is also preferred, wherein the application roller and the counter-roller are coupled in such a way that a rotation of the application roller causes a rotation of the counter-roller in the same direction of rotation. Additionally or alternatively, an application device according to the invention is also preferred, wherein the application roller and the first roller holder are coupled in such a way that a rotation of the application roller causes a rotation of an adhesive tape roll arranged in the first roller holder in the same direction of rotation.

According to the inventors, both non-positive and positive gears can be used for the structural implementation of the coupling mechanisms. The different types of gearboxes have different advantages and disadvantages. Positive gears regularly allow particularly reliable and controlled power transmission. In contrast, the non-positive gears here, by adjusting the slip, advantageously make it possible to avoid an unwanted increase in force, which can arise, for example, in the case of a coupled liner winding when the diameter of the liner wound on the winding roll increases. Preferred is therefore, on the one hand, an application device according to the invention, wherein the first coupling mechanism and/or the second coupling mechanism and/or the third coupling mechanism and/or the fourth coupling mechanism, preferably all coupling mechanisms, are based on a non-positive coupling.

Additionally or alternatively, an application device according to the invention is preferred, wherein the first coupling mechanism and/or the second coupling mechanism and/or the third coupling mechanism and/or the fourth coupling mechanism, preferably all coupling mechanisms, are based on a positive coupling. Individual coupling mechanisms can also be based on two or more different types of transmission, for example by using both gears and belts.

The inventors have identified particularly suitable designs for the design of the coupling mechanisms, whereby the various technologies can also be combined. The above-described inversion of the direction of rotation in traction drives can be achieved, for example, by inverting the belt guide, while in gear drives, for example, this can advantageously be achieved directly through the direct engagement of two gears arranged on the respective shafts. An application device according to the invention is preferred, wherein the first coupling mechanism and/or the second coupling mechanism and/or the third coupling mechanism and/or the fourth coupling mechanism comprises a traction mechanism, in particular a belt drive, a chain drive or a toothed belt drive, preferably a belt drive, particularly preferably with crossed belt guide. Additionally or alternatively, an application device according to the invention is preferred, wherein the first coupling mechanism and/or the second coupling mechanism and/or the third coupling mechanism and/or the fourth coupling mechanism comprises a gear transmission, in particular a gear transmission or a friction gear transmission.

1. vi) eine Trennvorrichtung,

wobei die Trennvorrichtung dazu eingerichtet ist, das in der Applikationsvorrichtung geführte bahnförmige Klebeelement bezogen auf den Bahnverlauf in der Applikationsvorrichtung vor der Applikationsrolle zu zertrennen, wobei die Trennvorrichtung bevorzugt eine Schneidvorrichtung ist.In later use, the adhesive element to be applied will regularly be provided by a roll of material that includes a very long web-shaped adhesive element. In most applications, not all of the adhesive tape on the roll of adhesive tape will be applied in one go. In order to enable particularly efficient process management and to reduce the need for additional tools, the inventors propose that the application device can also be provided with a separating device, which can be designed, for example, as a cutting device. For a particularly advantageous integration of this separating device into the application device according to the invention, it is expedient to use this separating device in relation to the web direction between the application roller and the pre-feed roller. Accordingly, an application device according to the invention is preferred, the application device additionally comprising:

1. vi) a separating device,

wherein the separating device is set up to separate the web-shaped adhesive element guided in the application device in relation to the path of the web in the application device in front of the application roll, the separating device preferably being a cutting device.

Particularly in those configurations in which the pre-feeding effect of the pre-feeding roller on the web-shaped adhesive element is conveyed via the web-shaped separating material, it is expedient to arrange the separating device in such a way that it only separates the web-shaped adhesive tape after the web-shaped separating material has been separated. Alternatively, the separating device can be positioned so that the web-shaped adhesive element is separated in an area in which it is still connected to the web-shaped separating material. In this case, however, according to the inventors' assessment, it is expedient to design the cutting device in such a way that it does not cut through the web-shaped separating material, or at least not completely.

In their own experiments, the inventors have found that cutting the adhesive tape, particularly in the case of foamed adhesives, can lead to a deformation of the adhesive, which is pushed away laterally, so that the width of the adhesive tape increases transversely to the direction of the web. For this reason, the inventors suggest that it is expedient to make the cutting edge of the cutting device wider than the adhesive tape that is to be cut with it. In this respect, an application device according to the invention is preferred, wherein the cutting edge of the cutting device is wider than the width of the web-shaped adhesive element orthogonal to the web direction, preferably 10% or more wider, particularly preferably 20% or more wider, particularly preferably 30% or more wider . Particularly preferred is additionally or alternatively an application device according to the invention, the cutting edge of the cutting device having a width orthogonal to the web direction in the range of 6 to 20 mm, preferably in the range of 7 to 15 mm, particularly preferably in the range of 8 to 10 mm .

The above statements deal in particular with the advantageous, low-stress guidance of the web-shaped adhesive element in the application device. However, the application device according to the invention also has a specifically designed application roller, which also contributes to reducing the mechanical loads acting on the adhesive tape. This application roll comprises a circumferential depression on the lateral surface in which the web-shaped adhesive element can be guided, the depression also extending into the lateral surface in many cases. In accordance with the expert understanding, the lateral surface of the regularly cylindrical or disk-shaped application rollers is the circumferential wall surface that runs parallel to the axis of rotation. The circumferential recess serves to ensure that the web-shaped adhesive element to be applied is not squeezed between the substrate surface and a flat lateral surface of the application roller during application, whereby it would be directly exposed to the pressure exerted by the user. The depression forms a cavity between the substrate and the application roller in which the adhesive tape is arranged during application. This not only fixes the position of the adhesive tape transversely to the application direction, but the resulting cavity also ensures that the side edges of the circumferential recess placed on the substrate limit the deformation effect acting on the applied adhesive tape by the application roller.

According to the inventors, the cross-sectional shape of the circumferential depression should essentially be adapted to the cross-sectional shape of the adhesive element to be applied and, at least with regard to the width dimension, also to the width of the adhesive element to be applied, in order to enable particularly gentle application. An example is an application device according to the invention, wherein the circumferential depression in the radial direction has an average depth in the range of 1 to 5 mm, preferably in the range of 2 to 4 mm, relative to the edge of the circumferential depression. Additionally or alternatively, an example is an application device according to the invention, wherein the circumferential depression in the cutting plane running parallel to the axis of rotation has a U-shaped or rectangular, preferably a rectangular, cross section.

Since in the application device according to the invention the rotation of the application roller is to be passed on to further rotatable elements of the application device through a coupling, the inventors propose using suitable measures to ensure that the application roller shows good friction to the underlying substrate, so that the substrate can be rolled on can reliably cause the application roller to rotate and the application roller does not slide over the substrate without a rotational movement. For this purpose, the inventors suggest that the corresponding lateral surface of the application roller can be provided with friction elements that ensure a particularly good grip on the substrate surface, for example plastic elements. The slip resistance enables rolling contact without sliding between the application roller and the substrate, which, in addition to secure web guidance, also prevents unwanted slipping, thereby ensuring that the unrolled length of the web-shaped adhesive element is precisely matched to the revolutions of the application roller. As a particularly advantageous embodiment, the inventors have used plastic rings identified, which can advantageously be arranged on both sides of the circumferential depression. The circumferential friction elements can also form part of the side wall of the recess, for example because two plastic rings are placed on an otherwise flat lateral surface and thereby form the circumferential depression between them, or because the two plastic rings are placed on the lateral surface in such a way that they form an in flank the circumferential depression formed on the lateral surface and thereby increase its effective depth. Preferred is an application device according to the invention, wherein the application roller comprises a circumferential friction element along the axial direction above and/or below, preferably above and below, the circumferential depression, preferably as part of the edge of the circumferential depression, the circumferential friction element preferably being designed as a plastic ring is.

1. a) Bereitstellen einer mit einem aufgewickelten bahnförmigen Klebeelement befüllten Klebebandrolle in der ersten Rollenaufnahme der Applikationsvorrichtung,
2. b) Anordnen eines freien Endabschnitts des bahnförmigen Klebeelements in der Applikationsvorrichtung, so dass das bahnförmige Klebeelement derart zwischen der Applikationsrolle und der Klebebandrolle verläuft, dass das bahnförmige Klebeelement bezogen auf den Bahnverlauf in der Applikationsvorrichtung zwischen der Applikationsrolle und der Klebebandrolle über die Vorförderrolle geführt wird, und
3. c) Applizieren des bahnförmigen Klebeelements an ein zu beklebendes Substrat,

wobei das bahnförmige Klebeelement beim Applizieren durch die umlaufende Vertiefung der Applikationsrolle geführt wird,
wobei die Applikationsrolle beim Applizieren über das zu beklebende Substrat gerollt wird,
wobei die Rotation der Applikationsrolle durch den ersten Kopplungsmechanismus eine Rotation der Vorförderrolle bewirkt, und
wobei die durch den ersten Kopplungsmechanismus bewirkte Rotation der Vorförderrolle das bahnförmige Klebeelement bezogen auf den Bahnverlauf in der Applikationsvorrichtung in Richtung der Applikationsrolle fördert.In light of the above statements, the invention also relates to a method for applying web-shaped adhesive elements with an application device according to the invention, comprising the method steps:

1. a) providing an adhesive tape roll filled with a wound web-shaped adhesive element in the first roll holder of the application device,
2. b) arranging a free end section of the web-shaped adhesive element in the application device so that the web-shaped adhesive element runs between the application roll and the adhesive tape roll in such a way that the web-shaped adhesive element is guided over the pre-feed roll in relation to the path in the application device between the application roll and the adhesive tape roll, and
3. c) Applying the web-shaped adhesive element to a substrate to be bonded,

whereby the web-shaped adhesive element is guided through the circumferential recess of the application roller during application,
whereby the application roller is rolled over the substrate to be bonded during application,
wherein the rotation of the application roller by the first coupling mechanism causes a rotation of the pre-feed roller, and
wherein the rotation of the pre-feed roller caused by the first coupling mechanism conveys the web-shaped adhesive element in the direction of the application roller with respect to the web path in the application device.

Preferred embodiments of the method according to the invention result from the use of preferred application devices according to the invention.

A method according to the invention is therefore preferred, wherein the application device is moved manually during application.

Consequently, additionally or alternatively, a method according to the invention is also preferred, wherein in method step b) a web-shaped separating material arranged on the free end section of the web-shaped adhesive element is separated from the web-shaped adhesive element and guided to the winding roll.

Additionally or alternatively, a method according to the invention is also preferred, wherein during application a web-shaped separating material arranged on the web-shaped adhesive element is separated from the web-shaped adhesive element and wound up on the winding roll.

Additionally or alternatively, a method according to the invention is also preferred, wherein the rotation of the application roll causes a rotation of the take-up roll by the second coupling mechanism, and the rotation of the take-up roll caused by the second coupling mechanism causes the web-shaped separating element to be wound up on the take-up roll.

In turn, additionally or alternatively, a method according to the invention is preferred, wherein the rotation of the application roll causes a rotation of the adhesive tape roll by the third coupling mechanism, and wherein the rotation of the adhesive tape roll caused by the third coupling mechanism promotes the unwinding of the web-shaped adhesive element from the adhesive tape roll.

1. d) Zertrennen des in der Applikationsvorrichtung geführten bahnförmigen Klebeelements mit der Trennvorrichtung, wobei das Zertrennen bezogen auf den Bahnverlauf in der Applikationsvorrichtung vor der Applikationsrolle erfolgt.

Additionally or alternatively, a method according to the invention is also preferred, additionally comprising the method step:

1. d) cutting the web-shaped adhesive element guided in the application device with the cutting device, the cutting taking place in front of the application roll in relation to the path of the web in the application device.

In this respect, additionally or alternatively, a method according to the invention is preferred, wherein the cutting is carried out with a cutting device, the cutting edge of the cutting device being wider than the width of the web-shaped adhesive element orthogonal to the web direction, preferably wider by 10% or more, particularly preferably by 20% or more wider, particularly preferably 30% or more wider.

Additionally or alternatively, a method according to the invention is also preferred, wherein the web-shaped adhesive element guided in the application device is separated at a section of the web-shaped adhesive element at which the web-shaped adhesive element has not yet been separated from the web-shaped separating material.

Additionally or alternatively, a method according to the invention is also preferred, wherein the cutting of the web-shaped adhesive element guided in the application device is carried out in such a way that the web-shaped separating material is not severed or not completely, preferably not.

Additionally or alternatively, a method according to the invention is preferred, wherein the web-shaped adhesive element has a mean width orthogonal to the web direction in the range of 4 to 10 mm, preferably in the range of 6 to 8 mm, and/or wherein the web-shaped adhesive element has a mean thickness orthogonal to the web direction in the range of 1 to 5 mm, preferably in the range of 2 to 4 mm.

A method according to the invention is particularly preferred, wherein the substrate to be bonded is a vehicle component, preferably a battery housing.

With regard to the handling of the adhesive elements, a method according to the invention is particularly preferred, wherein the web-shaped adhesive element is a pressure-sensitive adhesive element. Accordingly, a method according to the invention is particularly preferred, wherein the web-shaped adhesive element comprises a pressure-sensitive adhesive.

According to the expert's understanding, a pressure-sensitive adhesive is an adhesive that has pressure-sensitive adhesive properties, i.e. the ability to form a permanent bond to an adhesive substrate even under relatively light pressure. Such pressure-sensitive adhesive tapes can usually be removed from the adhesive substrate after use without leaving any residue and are generally permanently adhesive even at room temperature, which means that they have a certain viscosity and tackiness so that they wet the surface of a substrate even under low pressure. The tackiness of a pressure-sensitive adhesive tape results from the fact that a pressure-sensitive adhesive is used as the adhesive. Without wishing to be bound by this theory, it is often assumed that a pressure-sensitive adhesive can be viewed as an extremely highly viscous liquid with an elastic component, which consequently has characteristic viscoelastic properties that lead to the permanent tackiness and pressure-sensitive adhesive ability described above. It is assumed that in the case of corresponding PSAs, mechanical deformation leads to both viscous flow processes and the build-up of elastic restoring forces. The viscous flow serves to achieve adhesion, while the elastic restoring forces are particularly necessary to achieve cohesion. The relationships between rheology and pressure-sensitive adhesiveness are known in the state of the art and are described, for example, in “Satas, Handbook of Pressure Sensitive Adhesives Technology”, Third Edition, (1999), pages 153 to 203. The storage modulus (G') and the loss modulus (G'') are usually used to characterize the degree of elastic and viscous components, which can be determined by means of dynamic mechanical analysis (DMA), for example using a rheometer, as is the case, for example, in the WO 2015/189323 In the context of the present invention, an adhesive is preferably understood to be pressure-sensitively adhesive and thus a pressure-sensitive adhesive if, at a temperature of 23 °C in the deformation frequency range of 10° to 10 ¹ rad/sec, G' and G'' are each at least partly in the range of 10 ³ to 10 ⁷ Pa.

The person skilled in the art will understand that the method according to the invention using the application device according to the invention is particularly suitable for the application of passivated, foamed adhesive tapes, for example the commercial product ACXplus 76730 Box Seal from tesa.

Particularly preferred is a method according to the invention, wherein the web-shaped adhesive element comprises a foamed adhesive, particularly preferably a (meth)acrylate-based adhesive, very particularly preferably a syntactically foamed adhesive. Particularly preferred, additionally or alternatively, is a method according to the invention, wherein at least one side of the web-shaped adhesive element comprises an adhesion-reducing coating, preferably a polyurethane-based coating, wherein the web-shaped adhesive element is preferably set up so that the PSA under the action of pressure by the adhesion-reducing Coating can diffuse through.

• 1 eine schematische Darstellung einer erfindungsgemäßen Applikationsvorrichtung in einer ersten bevorzugten Ausführungsform;
• 2 die erfindungsgemäße Applikationsvorrichtung der 1 in einer schematischen Darstellung der Rückansicht;
• 3 eine schematische Darstellung der Applikation eines bahnförmigen Klebeelements an ein Substrat mit der Applikationsrolle einer erfindungsgemäßen Applikationsvorrichtung in der Seitenansicht;
• 4 eine schematische Frontansicht der Applikationsrolle der 3 bei der Applikation eines bahnförmigen Klebeelements an ein Substrat;
• 5 eine schematische Darstellung einer bevorzugten erfindungsgemäßen Applikationsvorrichtung in einer zweiten bevorzugten Ausführungsform; und
• 6 Eine schematische Darstellung der Rückansicht der erfindungsgemäßen Applikationsvorrichtung der 5.

The invention and preferred embodiments of the invention are explained and described in more detail below with reference to the accompanying figures. Show:

• 1 a schematic representation of an application device according to the invention in a first preferred embodiment;
• 2 the application device according to the invention 1 in a schematic representation of the rear view;
• 3 a schematic representation of the application of a web-shaped adhesive element to a substrate with the application roller of an application device according to the invention in a side view;
• 4 a schematic front view of the application roll 3 when applying a web-shaped adhesive element to a substrate;
• 5 a schematic representation of a preferred application device according to the invention in a second preferred embodiment; and
• 6 A schematic representation of the rear view of the application device according to the invention 5 .

1 shows a schematic front view of an application device 10 according to the invention when carrying out the method according to the invention.

The application device 10 according to the invention comprises a first roller receptacle 14, which is designed as a mandrel on which an adhesive tape roll 16 can be arranged reversibly and non-destructively replaceable, so that it can be rotated. The adhesive tape roll 16 comprises a web-shaped adhesive element 12, on the radially outer side of which a separating liner is arranged as a web-shaped separating material 32. The common material web of the web-shaped adhesive element 12 and the web-shaped separating material 32 is guided through a roller gap 40, which is formed between a pre-feed roller 18 and an oppositely arranged, spring-loaded counter roller 38.

A separating device 44 is arranged in the web direction behind the roller gap 40, which in the example shown is designed as a cutting device, the cutting edge being approximately 20% wider than the width of the web-shaped adhesive element 12 transverse to the web direction. In the web direction behind the separating device 44, the material web is guided over a knife edge, at which the web-shaped separating material 32 is deflected by more than 90° and pulled off the web-shaped adhesive element 12. After separation, the web-shaped separating material 32 is guided to a take-up roll 28 and wound up there.

The take-up roll 28 is rotatably mounted on a second roll holder 30, which is also designed as a mandrel. As soon as the take-up roll 28 is completely filled with wound web-shaped separating material 32, it can be removed from the application device 10 and replaced with an empty take-up roll 28. The web-shaped adhesive element 12 freed from the web-shaped separating material 32 is guided in the application device 10 behind the knife edge to the application roller 20, over which the web-shaped adhesive element 12 is then rolled onto a substrate 48.

In the embodiment shown the 1 the pre-feed roller 18, the counter roller 38, the first roller receptacle 14 and the second roller receptacle 30 are each kinematically coupled to one another in such a way that a rotation of the application roller 20 is converted into a rotation of the further rotatable elements. As a result, the web-shaped adhesive element 12 is gently conveyed through the application device 10 to the application roll 20 while the web-shaped separating material 32 is simultaneously wound up.

2 shows a schematic representation of the back of the application device 10 1 . The counter disks of the application roller 20, the pre-feed roller 18, the first roller holder 14, the second roller holder 30 and the counter roller 38, which are firmly connected to the respective rotation axis, are shown hatched 2 the first coupling mechanism 26 and the second coupling mechanism 34 are designed as a common overall coupling mechanism, whereas the third coupling mechanism 36 and the fourth coupling mechanism 42 are also designed as a separate overall coupling mechanism. In the example shown, all coupling mechanisms are implemented exclusively via non-positive belt transmissions, with the use of a crossed belt guide in the first coupling mechanism 26 causing the pre-feed roller 18 and the take-up roller 28 to have a direction of rotation that is inverted compared to the application roller 20.

3 shows a schematic representation of a rotatable application roller 20 when applying a web-shaped adhesive element 12 to a substrate 48. The front view of this structure is in 4 shown. 4 clarifies that the applied web-shaped adhesive element 12 is guided in the circumferential recess 24 of the application roll 20. On both sides of the circumferential recess 24, circumferential friction elements 46a, 46b are arranged, which are designed as rubber rings. The circumferential friction elements 46a, 46b form the edge of the circumferential recess 24, which also extends into the lateral surface 22. When the web-shaped adhesive element 12 is applied to a substrate 48, the friction elements make contact elements 46a, 46b its surface and prevent the web-shaped adhesive element 12 guided in the circumferential recess 24 from being compressed too much.

The 5 and 6 show an application device 10 according to the invention in a particularly preferred embodiment. In this particularly preferred embodiment, the application roller 20 is coupled to the pre-feed roller 18 and the non-replaceable take-up roller 28, with the first coupling mechanism 26 and the second coupling mechanism 34 being designed as an overall coupling mechanism. Here, the overall coupling mechanism is initially based on a positive coupling to the application roller 20 in the form of a gear transmission, through which the direction of rotation is inverted. After the transfer, the rotation is passed on by a toothed belt to an intermediate roller positioned in the rear part of the application device 10, which in turn is coupled to the pre-feed roller 18 and the take-up roller 28 on the front of the application device via corresponding toothed belts. The spring-loaded counter roller 38 is in the exemplary application device 10 5 and 6 just as little driven as the adhesive tape roll 16.

With application device according to the invention according to 1 and 2 or that 5 and 6 Adhesive tapes that are particularly sensitive to pressure and stretch, especially those with foamed adhesives and passivated surfaces, can also be applied reliably and reproducibly in a high quality. The design of the application roller 20 advantageously allows small curve radii during application and, due to the circumferential friction elements 46a, 46b designed as rubber rings, secure and non-slip contact with the substrate 48 to be glued.

Reference symbol list

10

Application device

12

Web-shaped adhesive element

14

First role recording,

16

Adhesive tape roll

18

Pre-conveyor roller

20

Application roll

22

Lateral surface

24

Circumferential recess

26

First coupling mechanism

28

take-up reel

30

Second roll recording

32

Sheet separating material

34

Second coupling mechanism

36

Third coupling mechanism

38

counter roll

40

Roller gap

42

Fourth coupling mechanism

44

Separating device

46a-b

Circumferential friction element

48

Substrate

Claims (15)

Application device (10) for the application of web-shaped adhesive elements (12), comprising: i) a first roll holder (14), the first roll holder (14) being set up so that an adhesive tape roll (16) filled with a web-shaped adhesive element (12) can be rotatably arranged in the first roll holder (14), ii) a rotatable pre-feed roller (18), and iii) a rotatable application roller (20), the application roller (20) having a recess (24) running along the circumferential direction on the lateral surface (22), wherein the application device (10) is set up so that a web-shaped adhesive element (12) provided by an adhesive tape roll (16) arranged in the first roll holder (14) can be guided via the pre-conveyor roll (18) to the application roll (20), wherein the application roller (20) and the pre-conveyor roller (18) are coupled to a first coupling mechanism (26), so that a rotation of the application roller (20) causes a rotation of the pre-conveyor roller (18). Application device (10). Claim 1 , wherein the application device (10) is a hand applicator. Application device (10) according to one of the Claims 1 or 2 , additionally comprising: iv.a) a rotatable take-up roll (28), or iv.b) a second roll holder (30), the second roll holder (30) being set up so that a take-up roll (28) can be rotated in the second roll holder ( 30) can be arranged, wherein the application device (10) is set up so that a web-shaped separating material (32) separated from a web-shaped adhesive element (12) guided in the application device (10) can be wound up on the take-up roll (28). Application device (10). Claim 3 , wherein the application roll (20) and the take-up roll (28) are coupled to a second coupling mechanism (34), so that a rotation of the application roll (20) causes a rotation of the take-up roll (28). Application device (10) according to one of the Claims 1 until 4 , wherein the application roll (20) and the first roll receptacle (14) are coupled to a third coupling mechanism (36), so that a rotation of the application roll (20) causes a rotation of an adhesive tape roll (16) arranged in the first roll receptacle (14). Application device (10) according to one of the Claims 1 until 5 , additionally comprising: v) a rotatable counter-roller (38), the counter-roller (38) forming with the pre-conveyor roller (18) a roller gap (40) arranged between the counter-roller (38) and the pre-conveyor roller (18), the application device (10 ) is set up so that the web-shaped adhesive element (12) guided in the application device (10) can be guided through the roller gap (40) to the application roller (20). Application device (10). Claim 6 , wherein the counter roller (38) is spring-mounted, so that the roller gap (40) can be expanded against the spring force of the spring bearing and / or so that the counter roller (38) applies a predetermined contact pressure to the web-shaped adhesive element (12) guided in the roller gap (40). to the pre-feed roller (18). Application device (10) according to one of the Claims 1 until 7 , wherein the application roller (20) and the counter-roller (38) are coupled to a fourth coupling mechanism (42), so that a rotation of the application roller (20) causes a rotation of the counter-roller. Application device (10) according to one of the Claims 1 until 8th , additionally comprising: vi) a separating device (44), wherein the separating device (44) is designed to move the web-shaped adhesive element (12) guided in the application device (10) in front of the application roller (20) in relation to the path of the web in the application device (10). ) to separate. Application device (10) according to one of the Claims 1 until 9 , wherein the first coupling mechanism (26) and / or the second coupling mechanism (34) and / or the third coupling mechanism (36) and / or the fourth coupling mechanism (42) are based on a positive coupling. Application device (10). Claim 10 , wherein the first coupling mechanism (26) and/or the second coupling mechanism (34) and/or the third coupling mechanism (36) and/or the fourth coupling mechanism (42) comprises a gear transmission, in particular a gear transmission or a friction gear transmission. Application device (10) according to one of the Claims 1 until 11 , wherein the application roller (20) and the pre-conveyor roller (18) are coupled in such a way that a rotation of the application roller (20) causes a rotation of the pre-conveyor roller (18) in the opposite direction of rotation. Application device (10) according to one of the Claims 1 until 12 , wherein the application roller (20) and the winding roller (28) are coupled such that a rotation of the application roller (20) causes a rotation of the winding roller (28) in the opposite direction of rotation. Application device (10) according to one of the Claims 1 until 13 , wherein the application roller (20) comprises a circumferential friction element (46a, 46b) along the axial direction above and/or below the circumferential recess (24). Method for applying web-shaped adhesive elements (12) with an application device (10) according to one of Claims 1 until 14 , comprising the method steps: a) providing an adhesive tape roll (16) filled with a wound web-shaped adhesive element (12) in the first roll holder (14) of the application device (10), b) arranging a free end section of the web-shaped adhesive element (12) in the application device (10), so that the web-shaped adhesive element (12) runs between the application roll (20) and the adhesive tape roll (16) in such a way that the web-shaped adhesive element (12) lies between the application roll (20) in relation to the web path in the application device (10). and the adhesive tape roll (16) is guided over the pre-feed roller (18), and c) applying the web-shaped adhesive element (12) to a substrate (48) to be glued, the web-shaped adhesive element (12) passing through the circumferential recess (24) during application. the application roller (20), the application roller (20) being rolled over the substrate (48) to be glued during application, the rotation of the application roller (20) causing a rotation of the pre-feed roller (18) through the first coupling mechanism (26). , and wherein the rotation of the pre-conveyor roller (18) caused by the first coupling mechanism (26) causes the web-shaped adhesive element (12) in relation to the Web path in the application device (10) promotes in the direction of the application roller (20).

Images