Patent Application
20220324132
The present application claims priority of DE 10 2021 108 795.3, filed Apr. 8, 2021 and DE 20 2021 101 889.5, filed Apr. 8, 2021, the priority of these applications are hereby claimed, and the application is incorporated herein by reference.
The invention relates to a cutting device for cutting narrow strips from a material web, in particular a rubberized material web.
For different applications, it is sometimes necessary for a narrow strip of a material web to be arranged on or integrated into an object, in which strip at least one magnetically couplable element is embedded or on which strip a magnetically couplable element of this type is arranged. Here, the material web serves as a carrier for the element. An element of this type serves, for example, for labeling purposes, with the result that the object, on which the element is arranged, can be labeled or identified on the basis of this element. The material web is a flexible web material made from plastic, preferably from a rubberized material, industrially manufactured elastomers being meant here. Depending on the material, it can also be adhesive. A magnetically couplable or magnetically interacting element can be, for example, a metal strip or a magnet or the like, the presence of which on the equipped object can be detected by means of a suitable detection or reading unit. In particular, the element can be an RFID chip, on which defined information can be stored which can then be read out on the respective object, equipped with the RFID chip, in order to identify it.
One exemplary application where strips of this type which are fitted with at least one element can be installed is the field of tire production. By way of the integration of a strip of this type, fitted with an element, into the tire during the building process of the tire, each single tire is provided individually with a labeling element of this type, that is to say, for example, an RFID chip, with the result that it can be identified. For example, corresponding information with regard to the manufacturing date, the manufacturing batch, the permissible filling pressure, etc. can be stored on the RFID chip and can be read out as required. This exemplary application is not restrictive, however, and applications in other fields are also conceivable.
Within the context of the production of strips of this type, the material web is first of all produced, in which material web the magnetically couplable elements, that is to say, for example, the RFID chips, are embedded or on which they are arranged. To this end, the separated elements or RFID chips are placed, for example, onto a first material web, that is to say, for example, a first rubber web, after which a second material web, that is to say a second rubber web, is placed onto this first material web and therefore onto the positioned elements, with the result that the elements or RFID chips are embedded in this case. This accordingly results in a sandwich web, that is to say a corresponding, dual-layer rubberized material web, the individual layers of which, however, can ultimately no longer be separated on account of their adhesiveness.
It is then necessary to cut off the individual strips from this material web, each strip comprising at least one element. However, the cutting of narrow strips is problematic, in particular, when very narrow strips are to be cut, for example when the strip width lies in the range of a few millimeters, for example from approximately 8 to 12 mm. On account of the flexibility of the material web and also on account of its sometimes present adhesiveness, problems arise with the use of a cutting blade resulting from any movement of the material web during cutting, with the result that inaccuracies can occur in the case of subsequent cuts, and consequently therefore exact cutting of the desired strip geometry and/or strip width is not ensured. This is required, however, since corresponding requirements are made of the permissible strip size in relation to further processing.
The invention is therefore based on the problem of specifying a suitable cutting device for cutting narrow strips from a material web, in particular a rubberized material web.
In order to solve this problem, according to the invention, a cutting device is provided for cutting narrow strips from a material web, in particular a rubberized material web, in or on which magnetically couplable elements are embedded or arranged at defined spacings behind one another in the web longitudinal direction, comprising a blade table which is arranged on a device frame, and on which the material web to be cut can be positioned, a cutting apparatus comprising a cutting blade which can be moved out of a starting position into a cutting position relative to the blade table, and a gripping device which receives and transports a cut strip and can be moved relative to the blade table,
The cutting device according to the invention makes exact cutting even of very narrow strips possible, for example with a section width between 8 mm and 12 mm, in the case of a preferred strip length of between 70 to 80 mm, even in the case of the use of a relatively adhesive, rubberized material web. At the same time, the cutting device makes it possible in a simple way for a cut strip of this type to be received by means of a gripping device, via which the strip can be transported away.
To this end, the cutting device has a cutting apparatus with a cutting blade which can be moved out of a starting position into a cutting position, in particular an ultrasonic cutting blade comprising a blade unit in the form of an ultrasonic booster with a corresponding blade (usually called a horn) or a heatable blade, with a correspondingly wide cutting edge. This cutting blade can expediently be moved in a linear manner from above onto the material web, which material web lies on a corresponding blade table. The blade is moved into a corresponding cutting position, this blade, after being placed on the material web and until the cutting position is reached, severing the material web.
In accordance with a first alternative, the material web is fixed on the blade table by means of a gripping device during the entire cutting operation. This gripping device serves firstly to fix the material web and subsequently the cut strip during the entire duration of the blade movement, and secondly at the same time also serves to receive and fix the strip for the subsequent removal. In order to fix the material web, the gripping device comprises a hold-down section which can be placed flatly from above onto the material web which is positioned on the blade table. This hold-down section presses with a sufficiently dimensioned force onto the material web and presses the latter against the blade table, with the result that it is, as it were, clamped in immovably between the hold-down section and the blade table. That is to say, the front (in the transport direction), leading, free end of the material web lies on the blade table and is fixed positionally via the hold-down section. At least one magnetically couplable element is necessarily situated in the region of this front end; the strip is intended to be severed at this front end.
Furthermore, a magnetic element is arranged on the gripping device itself, which magnetic element interacts magnetically with a magnetically couplable element which is provided in the region of the leading end. Corresponding fixing of the front web end is possible via this magnetic interaction, as long as synchronized transport is also intended to be assisted with the use of the gripping device. Via this, however, the fixing of the cut strip is at least possible, with the result that it is fixed magnetically on the gripping device or on the underside of the hold-down, and can subsequently be moved and transported away via the movable gripping device.
As described, the gripping device lies on the upper side of the material web, so as to reach flatly over its front edge or its front end. In order that the material web is fixed over a sufficient length, as viewed in the transport direction, the hold-down section also has a corresponding length, as viewed in the web transport direction, that is to say it reaches over the material web, as viewed from its front edge, over a length of several centimeters, for example from 4 to 8 cm, in the case of a corresponding width which is greater than the width of the web material. In order that a correspondingly narrow strip with a width (as viewed in the conveying direction of the material web) of a few millimeters, for example of from 8 to 15 mm, is then possible despite the large-area fixing via the hold-down section, according to the invention in accordance with the first alternative the hold-down section has a recess, through which the cutting blade can be moved to the blade table into the cutting position. That is to say, the cutting blade cuts through the hold-down section. Since, however, the hold-down section fixes and holds down the material web both in the region directly at the web end and also, adjoining the recess, in the following web region, it is therefore ensured that no relative movement at all on the part of the material web and the cut strip occurs both during the cutting operation, that is to say when the cutting blade cuts into the material web through the recess, and during pulling out of the cutting blade after the cutting operation. This is because there is corresponding fixing of the material web both in front of and behind the actual cutting line. Therefore, the cutting device according to the invention also makes it possible to cut extremely narrow strips, since, according to the invention, cutting is carried out through the hold-down section, with simultaneous two-sided fixing of the web material in front of and behind the cutting line.
In accordance with the second alternative according to the invention, the strip is held down not only by way of the gripping device, but rather additionally by way of at least one hold-down element which, just like the gripping device, is placed onto the material web. The hold-down element is arranged in front of the gripping device, as viewed in the transport direction, that is to say lies on the material web in front of the gripping device for the cutting operation. There is a spacing, that is to say a clearance, between the hold-down element and the gripping device. The cutting blade then moves into this clearance, in order to cut off the strip. The gripping device therefore does not have a recess here; rather, the reach-through region, through which the cutting blade is guided, is defined and delimited via the further hold-down element. In the case of this alternative, the material web is therefore also fixed in front of and behind the cutting blade. This embodiment according to the invention allows the holding down of the material web to be of variable design, since the gripping device including the hold-down section and the hold-down element can be actuated separately and, as a consequence, can also be raised up again from the material web, in particular, either in a temporally synchronous or temporally staggered manner. The cutting blade can likewise also be moved in a manner which is decoupled from the gripping device and the hold-down element, which allows, for example, the cutting blade to still be left in the cutting position, while the gripping device is raised and takes the strip with it, and while the hold-down element is still seated on the material web.
This second alternative embodiment is advantageous, in particular, when a greatly adhesive material web is concerned. If a greatly adhesive material web of this type is processed only by way of the gripping device of the first alternative, it can occur that the material web adheres in a relatively great manner to the gripping device or the hold-down section which has the recess, with the result that not only the cut strip is raised, but rather also the edge of the material web which also adheres to the hold-down section. It can also occur that, when the cutting blade is moved up out of the cutting position after the cutting operation and before the raising of the gripping device, the strip and the material web can immediately adhere on one another again on account of the high adhesiveness of the material, which further impedes the raising of the strip. This can be avoided by way of the second alternative. This is because, by virtue of the fact that the holding down takes place by way of two separate elements, namely the gripping device or its hold-down section firstly and the upstream hold-down element secondly, the raising can take place after the cutting operation in such a way that the hold-down element still rests briefly in a lowered manner on the material web edge while the gripping device is raised. Since the gripping device does not reach as far as beyond the material web, only the strip can thus be raised, without the material web edge being moved with it. It is also possible that the cutting blade still remains in the cutting position until raising of the gripping device, and provides a separating plane, via which the strip and the material web edge are separated, with the result that the two cannot adhere to one another. Only after the gripping device is raised and the strip is removed, possibly even only to a minimum extent, from the material web edge, can the cutting blade be moved upward and can the hold-down element be raised from the material web.
Furthermore, as described, the gripping device can be moved relative to the blade table, that is to say can be moved both toward the latter, in order to fix the material web and, as it were, to receive the cut strip after the cutting operation, and can also be moved away from the blade table, in order to remove the strip. Since the hold-down section is also provided on the gripping device, a highly compact unit is accordingly provided which serves both for fixing for the cutting operation and for receiving and removing of the cut strip which is fixed on the hold-down section via the magnetic interaction of the magnetic element with the strip-side element. That is to say, the gripping device is given a dual function, namely firstly the sole or partial web fixing, but secondly also the gripping or receiving and removing of the strip. As a consequence, the cutting device itself combines the coupling of the material web and, resulting from this, of the cut strip to the gripping device with the actual cutting operation, with the result that there is already the fixing of the cut strip by the magnetic element on the hold-down section directly after ending of the cutting operation and, as a consequence, the removal can take place directly after the cutting operation. This is because receiving, taking place only after the cutting operation, of the cut strip is especially not required here, since the strip is connected magnetically to the gripping device at the time of its production, that is to say at the cutting time.
For the individual movements of the movable components such as cutting blade, gripping device, hold-down element, etc., corresponding actuating means for the respective movement are of course provided, in particular actuating cylinders which operate pneumatically, hydraulically or electrically and via which highly precise actuating paths can be followed. The magnetic element can be, for example, a bar, on which one or a plurality of permanent magnets is/are arranged.
According to the invention in accordance with the first alternative, as described, the hold-down section is provided with a recess, through which the blade cuts. In order firstly for the bearing area of the hold-down section on the material web to not be of excessively great configuration, and in order secondly for best possible fixing to nevertheless be achieved in the region of the cutting line, it is expedient if the recess is configured as an elongate slot. As viewed in the direction perpendicularly with respect to the web transport direction, this elongate slot of course has a length which is greater than the web width, since the cutting blade is after all also wider than the material web. The slot width, as viewed in the web transport direction, is as narrow as possible, since the cutting blade itself is very narrow. Depending on the thickness of the cutting blade, a slot width of, for example, from 5 to 15 mm is sufficient. If, in particular, the cutting blade (which will still be described in greater detail in the following text) has an adjustable cutting angle (which will still be described in greater detail in the following text), a somewhat greater slot width can be selected. This also applies in relation to the second alternative, in accordance with which a clearance, that is to say a spacing, is produced between the hold-down element and the gripping device or its hold-down section. This clearance is also expediently designed as a narrow slot which runs transversely with respect to the web longitudinal direction, with the result that it is also ensured here that the material is fixed close to the actual cutting plane.
One of the central elements of the cutting device is the gripping device. The latter can comprise a housing with a bottom and a hold-down plate which is arranged on the housing or on the bottom side, the hold-down plate and at least one section of the bottom forming the hold-down section. The hold-down plate and the bottom section are, as far as their exposed underside which forms the hold-down section is concerned, flush with one another, that is to say run in one plane. As an alternative, it is conceivable in a simpler embodiment for, instead of a housing, only a simpler plate-shaped carrier to be provided, on which, in a similar manner to on the housing, the magnetic element is arranged. If it is expedient for manufacturing reasons, a hold-down plate can be arranged on the carrier, the hold-down plate and at least one carrier section also forming the hold-down section in this case, the underside of the hold-down plate also again being flush-mounted with the carrier underside here. As an alternative, however, it is also conceivable for only a carrier to be provided which is provided with the recess or the slot, that is to say for no additional hold-down plate to be provided. In this case, accordingly, only a corresponding carrier section forms the hold-down section. Furthermore, the underside of the housing or of the bottom or of the carrier itself can also form the hold-down section, in particular with regard to the second alternative. That is to say, a separate hold-down plate does not have to be provided here, but can be provided. Here, the clearance is then therefore configured directly between the hold-down element and the housing or bottom or carrier.
If a hold-down plate is provided, the recess, in particular the slot, is expediently provided between the hold-down plate and the housing or the carrier. That is to say, the hold-down plate as it were merely extends the housing or the carrier, with the result that the gripping device has a correspondingly large overlapping section which lies on the material web.
One advantageous development of the invention with regard to the two alternatives provides that the magnetic element interacts with the magnetically couplable element through the bottom or the carrier. As described, the bottom or carrier section reaches over the strip region to be cut at the leading web end, that is to say the magnetically couplable element is arranged below the bottom or carrier section. The magnetic element is then expediently arranged in such a way that it interacts with the element through the bottom or the carrier, and therefore as a consequence attaches this element magnetically. Large-area support which distributes the pressing force as satisfactorily as possible is ensured by virtue of the fact that the bottom or carrier section is closed in the support region. At the same time however, there is also highly close positioning with respect to the element by virtue of the fact that the magnetic element is arranged above the strip-side element and acts through the bottom or carrier, which highly close positioning allows secure magnetic fixing. That is to say, the magnetic element is arranged as far as possible directly vertically above the strip-side element, in order to avoid lateral magnetic forces which exert a transverse pull on the element acting between the magnetic element and the strip-side element. At least the bottom or the carriers is/are made from a corresponding material which conducts the magnetic flux, with the result that the magnetic element can couple to the strip-side element.
A projection which forms a run-on edge for the material web can be provided on that side of the bottom or of the carrier which faces the blade table. If the gripping device is lowered onto the web material, slight raising of the web material edge which has not yet been fixed can occur, since the magnetic element is arranged on the gripping device, that is to say this web material edge is pulled in the direction of the gripping device. The projection stops the web movement.
In one expedient embodiment of the invention, the magnetic element is arranged on or in the housing or on the carrier such that it can be moved between a raised and a lowered position, in which it interacts magnetically with the element. That is to say, the magnetic element can be moved in a defined manner between two positions, with the result that it can be moved in a targeted manner into a lowered position, in which it interacts magnetically with the strip-side element in an especially defined and intentional manner. To this end, the magnetic element is preferably mounted pivotably on the housing or on the carrier, that is to say can be moved between a pivoted-up rest position and a pivoted-down coupling position. A corresponding actuating means, for example a pneumatically, hydraulically or electrically operating actuating cylinder, is also used here for the movement.
In the case of the second alternative, the movable hold-down element is also provided, as stated, in addition to the hold-down section on the gripping device. In order for it to be possible for this hold-down element to be adjusted between the raised non-working position and the working position, in which it is lowered onto the material web, the hold-down element can expediently be moved in a linear or pivotable manner relative to the material web by means of a movement device. It can therefore be moved in a linear manner, for example, in a vertical movement, or can be pivoted by a pivoting angle about a pivot axis. The respective actuating movement can be relatively small, since it is merely necessary for the hold-down element to be raised to such an extent that the material web can be delivered for the next cycle. Raising, for example, by a distance of, for example, from 0.5 to 3 cm or pivoting by, for example, from 3° to 15° is sufficient.
The hold-down element itself can be a bar which can be moved in a linear or pivotable manner or a pivotable flap. Both make secure holding down of the material web possible, since they of course extend over the entire web width. It is also conceivable, for example in the case of relatively wide material webs, for two or more bars or flaps to be arranged next to one another and possibly spaced apart somewhat from one another, in order to reduce the contact area, such that it would be sufficient for holding down if the material web is held merely locally at several points.
It is expedient here if the bar or the flap can be placed with an edge onto the material web. As a consequence, there is only a narrow contact line between the edge and the material web, which is sufficient for holding down and at the same time ensures that the material web does not adhere to the hold-down element. Furthermore, the hold-down element can consist of a material which has a reduced adhesion with respect to the web material, for example a non-stick plastic, or can be covered with a coating of this type. This also otherwise applies to the hold-down section of the gripping device, also with regard to the first alternative.
The cutting blade itself can be an ultrasonic cutting blade or a heatable cutting blade. A heated cutting blade is advantageous, in particular, for cutting highly adhesive material, since the cutting force is decreased by way of heating and, as a result, adhering to the cutting base, in particular in the case of highly adhesive material, can be avoided.
It can be provided in one development of the invention that the cutting blade is arranged on a blade carrier which is arranged in a holder such that it can be moved in a linear manner. A defined, linear cutting blade movement is ensured via this linear guidance of the blade carrier on the holder. This cutting blade movement also takes place via a correspondingly actuable actuating means such as a pneumatically, hydraulically or electrically operating actuating cylinder.
The position of the cutting blade or its linear movability can be such that the cutting blade can be placed only vertically from above onto the plane of the material web. That is to say, only a cutting operation with a right-angled cutting edge is possible. If another cutting angle is desired, a correspondingly different angular position and therefore direction of the linear movement is necessary. That is to say, the corresponding cutting angle or the arrangement of the cutting blade relative to the material web is fixed and unalterable. In contrast, however, one advantageous embodiment of the invention is provides that the holder, on which the cutting blade is arranged via the blade carrier, can be pivoted relative to the device frame about a horizontally running pivot axis, perpendicularly with respect to the web longitudinal direction of the web material. Accordingly, as a consequence, the holder and, with it, the cutting blade can be pivoted about a horizontal axis, with the result that the cutting angle can be adjusted, for example, between a vertical cutting operation with a 90° cutting edge and an angular cutting operation with, for example, a 45° cutting edge. This makes it possible for the user to set different cutting angles as required, the cutting line always running perpendicularly with respect to the web longitudinal direction in this case.
In this context, however, it is also conceivable for not only the cutting angle at the actual cutting edge to be adjusted. Rather, it is fundamentally also possible for the angle of the cutting line which the latter assumes with respect to the web longitudinal direction to be varied, and consequently therefore for the cutting blade to be pivoted about a vertical axis, with the result that a cutting line at an angle which does not equal 90° with respect to the web longitudinal direction is possible. To this end, however, it is necessary for not only the cutting blade or the corresponding holder to be pivoted about the vertical axis, but rather also the downstream periphery comprising the gripping device, since then of course the cut strip runs at a corresponding cutting angle with respect to the web longitudinal axis.
If, as described, the holder can be pivoted about a horizontal pivot axis, the pivot axis should preferably coincide with a cutting line which lies in the plane of the blade table and is defined via the cutting edge of the cutting blade in the cutting position. That is to say, the cutting edge of the cutting blade accordingly always strikes one and the same cutting line on the blade table independently of the cutting angle which is set. It goes without saying that the “coinciding” also includes slight, usually tolerance-induced deviations, that is to say a common cutting line is realized fundamentally independently of the cutting angle.
As stated in the preceding text, the gripping device can be moved relative to the blade table, in order firstly to deposit it onto the material web for holding down and to couple the magnetic element to the strip-side element, and secondly to move and to transport the magnetically fixed cut strip. To this end, it is provided in accordance with one specification of the invention that the gripping device is arranged on a movement device which can be moved both vertically and horizontally relative to the blade table. This movement direction which will also be described in the following text in detail and in different design variants is fundamentally responsible for the vertical movement of the gripping device, that is to say the lowering and lifting movement of the gripping device, and also for the horizontal movement of the gripping device or the movement of the gripping device in a horizontal plane, for example in order to move the gripping device into a depositing position, in which the cut strip is deposited, or, for example if the gripping device is also used within the context of the synchronized web advance, to move it horizontally to this end. That is to say, a plurality of degrees of freedom of movement, namely in the vertical and horizontal direction or plane, are made available via this movement device.
One particularly advantageous development of the invention provides that the movement device is configured for the vertical and horizontal movement along respective linear axes and for the horizontal movement by way of a rotation about a vertical axis. That is to say, firstly a vertical degree of freedom of movement is realized by virtue of the fact that a linear axial movement is realized via corresponding elements of the movement device. A horizontal movement along at least one horizontal linear axis which is realized via corresponding elements is likewise provided. That is to say, linear lifting and moving movements take place via this. In addition to these linear movements, however, a rotational movement is also provided, that is to say the movement device has corresponding elements which make a rotation of the gripping device about a vertical axis possible, with the result that the gripping device can be pivoted in a horizontal plane. That is to say, it can be pivoted away from the blade table and toward the blade table by way of this rotation, while the vertical and horizontal linear axes make a corresponding linear movement of the gripping device away from and toward the blade table possible.
In particular, the realization of the rotational movement on the part of the movement device makes it possible with a particular advantage for not only one gripping device to be provided, but rather two gripping devices which are arranged rotated by 180° and adjacently with respect to one another, which gripping devices can be rotated together and simultaneously in each case toward the cutting apparatus and away from the latter by way of a rotation on the part of the movement device. The two gripping devices are therefore oriented in an opposed manner with respect to one another, as viewed in the web transport direction. While the one gripping device is positioned adjacently with respect to the cutting apparatus and a cut strip can be received on this gripping apparatus, the second gripping device is positioned so as to face away from the cutting apparatus and moves a cut strip to a depositing position. That is to say, the one gripping device receives a strip, while the other gripping device deposits a strip. This makes a spectacular increase in the throughput possible, since receiving of a cut strip and depositing of a previously cut strip can ultimately take place simultaneously in a common working cycle. It is conceivable in this context that the two gripping devices can be moved correspondingly vertically and/or horizontally via corresponding linear guides in each case separately or independently of one another, with the result that the individual gripping devices can carry out movements which are independent in terms of synchronization from one another within one work cycle, by the one gripping device interacting with the material web and the other bringing about the depositing of a cut strip. These linear, independent movements are also brought about by corresponding actuating means such as suitable pneumatic, hydraulic or electric actuating cylinders which can be actuated correspondingly.
In order to attach the working unit comprising the movement device and the one or the two gripping devices to the device frame and at the same time, via this, to realize a first linear horizontal degree of freedom of movement, the invention further provides that the movement device comprises a slide, via which it is arranged in a horizontally movable manner on a linear guide which is provided on the device frame. Accordingly, the entire construction, arranged on this slide, of the following components of the movement device including the gripping device or devices can be moved horizontally, via this slide guide on the device frame, relative to the device frame and the blade table which is arranged in a positionally fixed manner on it. This movement also expediently takes place via an actuating means, in particular in the form of a pneumatically, hydraulically or electrically operating actuating cylinder. The actuating movement is relatively short; it is merely a few centimeters. It can serve, in particular, to realize a synchronized web advance by means of the gripping device or to incorporate the gripping device into this. To this end, the gripping device is placed onto the material web end which is to be moved into the cutting position, and the gripping device including the web material is then moved in a linear manner by the corresponding section width, that is to say, for example, approximately from 8 to 15 mm, by way of displacement of the slide, and the web end is moved into the cutting position, in which it is then fixed on the blade block via the gripping device.
In order to realize a linear vertical degree of freedom of movement, a holder can be arranged on the slide such that it can be moved vertically, to which holder the gripping device is coupled or the two gripping devices are coupled. Here too, a suitable linear guide is once again provided on the slide, on which linear guide the holder is arranged such that it can be moved vertically. The holder as part of the movement device is coupled in terms of movement to the gripping device or devices; that is to say, in the case of a vertical holder movement, the gripping device or the two gripping devices are necessarily also moved vertically. The holder is also expediently moved by means of an actuating element in the form of a pneumatically, hydraulically or electrically operating actuating cylinder.
In order for this vertical movement to be realized in a simple way, a pivoting lever which is mounted pivotably on the slide and can be moved via an actuating element, for example the above-described actuating cylinder, can be provided, which pivoting lever is coupled to the holder. A transmission ratio can be realized via this lever arrangement. This is expedient, since the vertical stroke which the gripping device or the two gripping devices is/are ultimately intended to perform via this can be relatively small; it lies in the range of a few millimeters, for example from 2 to 4 mm. Since most of the weight of the movement device together with the gripping device or devices is supported via the pivot point of the pivoting lever, a gentle up and down movement can be achieved via this.
In order to also make an independent, direct movement of the one or the two gripping devices possible, one expedient embodiment of the invention provides that the movement device comprises a mounting plate, on which the one or the two gripping devices is/are arranged in each case in a linearly movable manner along a horizontal axis and/or along a vertical axis. Accordingly, this mounting plate forms a mounting interface, on which the one or the two gripping devices can be assembled. Relative to this mounting plate, the or each gripping device can be moved in a linear manner either only along a vertical axis, along a horizontal axis or along both. That is to say, additional degrees of freedom of movement can be realized via this, possibly in addition to the above-described movement capabilities along the horizontal and the vertical axis. These are expedient, in particular, when two gripping devices are provided, since, as described above, they allow different, separate movements to be carried out with different cycle times.
One development of this concept of the invention provides that the gripping device or in each case one gripping device is arranged on a vertical actuating device which is arranged on a horizontal linear guide on the mounting plate. This vertical actuating device and horizontal linear guide are also part of the movement device. Once again, the vertical adjustment and the horizontal adjustment can take place via corresponding actuating elements such as pneumatically, hydraulically or electrically operating actuating cylinders, the vertical and horizontal movement of course being independent of one another.
If a rotational movement is additionally provided on the part of the movement device, which rotational movement is already expedient in the case of only one gripping device, but is of particular advantage in the case of two gripping devices, in particular, a rotary drive is expediently provided to this end, which rotary drive is coupled to the gripping device or the two gripping devices. That is to say, the one or the two gripping devices can be pivoted in the horizontal plane via this rotary drive. This rotary drive can be arranged on the holder which, as described above, is arranged via a vertical linear guide on the horizontally movable slide. That is to say, the rotary drive is also raised vertically via the holder, and, with the rotary drive, the gripping device which is coupled to it or the two gripping devices is/are of course also raised. It is conceivable here that the rotary drive is connected directly via a corresponding connection to the mounting plate. That is to say, the mounting plate is attached, for example, to a corresponding mounting flange of the output shaft of the rotary drive, with the result that the entire construction consisting of the mounting plate and gripping device/devices is seated on the rotational device.
Overall, accordingly, the different design variants make it possible to realize a plurality of different degrees of freedom of movement which can be actuated separately, both in the form of linear movements and also a rotational movement, these degrees of freedom of movement including, by way of the linear movement, either large parts of the movement device or of the corresponding gripping and transport construction, or only individually one gripping device or the respective gripping device.
In order to cut a strip, the material web has to be advanced synchronously by the respective strip width, that is to say has to be transported into the region of the cutting apparatus. To this end, a transport means, in particular a transport belt, can be provided on the device frame for transporting the material web to the cutting apparatus. Accordingly, this transport means is part of the cutting device; via the transport means, the synchronized advance takes place by the small advancing length in a manner which corresponds to the strip width. A transport belt is preferably used which expediently consists of a material which has only low adhesion to the material web, with the result that the latter adheres as little as possible to it.
In accordance with one particularly advantageous development, it can be provided that the movement of the transport means and a horizontal movement of the movement device, during which the gripping device is seated on the web material and the magnetic element interacts with the magnetically couplable element, are synchronized for transporting the web material into the cutting position. As has already been stated in the preceding text, there is the optional possibility of integrating a gripping device into the synchronized web advance. To this end, after a cutting operation has taken place and removal of the cut strip, the gripping device is moved again into a position above the web end which is not yet situated in the actual cutting position. The gripping device is lowered, and the magnetic element couples to the web-side element which is situated directly below it. Subsequently, the gripping device is raised vertically slightly, and firstly the transport belt is moved in a synchronized manner in the transport direction, and at the same time the gripping device is also moved in the transport direction via the movement device. The two movements, that is to say that of the transport belt and of the gripping device, are synchronized, with the result that they both cover exactly the same distance. The movement ends when the leading web edge has reached the end position, after which the gripping device is lowered and deposits the web end on the blade table and at the same time fixes it. This ensures an exact transport movement and positioning of the web end.
Different embodiments are conceivable for the movement of the transport means. To this end, firstly, a corresponding drive motor which drives a drive roller, over which the preferably belt-shaped transport means runs, can be provided. This drive motor is synchronized with the corresponding actuating element for the horizontal movement of the slide, via which the movement of the gripping device takes place. As an alternative, in order to move the transport means, a clamping means which acts releasably on it and can be moved in a linear manner can be provided. The operation of this clamping means which can be moved horizontally in both directions, for example, via a corresponding actuating cylinder is of course also synchronized with the actuating operation of the slide.
In order to prevent it being possible for the material web which lies on the transport means to slip, it is expedient if one or more magnetic means which interact magnetically with the elements of the material web is/are provided below the upper run of the transport means. That is to say, these magnetic means couple magnetically to the web elements and fix them on the transport belt, with the result that the material web is secured against slipping.
Furthermore, a transfer table which can be raised and lowered and guides the material web can be provided between the end of the transport means and the blade table. Since the transport means is a circulating transport means, preferably, as described, a transport belt, a gap arises between the end of the transport means and the blade table. This gap is bridged by means of a transfer table. Here, the transfer table can be raised and lowered, in order that a smooth transfer of the web to the blade table is possible. This is because, within the context of this transfer, the end of the material web can be raised and conveyed via the gripping device, as stated. This raising and lowering movement can be assisted via the transfer table. Here, the transfer table is expediently coupled to a movement on the part of the movement device, in particular the vertical movement of the holder, within the context of which the gripping device can be raised and lowered, after this movement serves to raise the gripping device for the subsequent web transport into the cutting position. This coupling can take place purely mechanically, for example, via a lever arrangement or via a driver arm and a slotted guide or the like. As an alternative, the transfer table can of course also have a dedicated actuating element such as an actuating cylinder. Here, the table movement can be limited in both directions by way of stops.
It is expedient if the transfer table is provided with a sliding liner or sliding coating, that is to say a non-stick coating, since the material web is pulled over it.
The transfer table is preferably mounted pivotably and can be raised and lowered with the end which is adjacent with respect to the blade table. That is to say, the transfer table can be adjusted as it were in a ramp-like manner, with the result that the material web can be pulled into a defined, raised position.
In order to enable a transition which is as free from gaps as possible from the transfer table to the blade table, it is conceivable for a chamfer to be provided on the transfer table at the end which is adjacent with respect to the blade table, which chamfer is arranged adjacently with respect to a dimensionally compatible chamfer on the blade table in the lowered position.
Furthermore, a recess for receiving a section of the gripping device, in particular a projection which is provided on its underside, can be provided on the upper side of the blade table in the region of the end which faces away from the cutting apparatus.
The blade table itself preferably comprises a liner which is made, in particular, from plastic and forms its upper side which supports the web material. This liner is also preferably made from a material which exhibits as low as possible a tendency to adhesion with respect to the material web. If provided, the above-described chamfer and/or the recess are/is configured on this liner.
In addition to the cutting device itself, the invention relates, furthermore, to an apparatus for producing and processing strips of a material web, of which strips each contains at least one magnetically couplable element, comprising a cutting device of the above-described type and a receiving device which is connected downstream of this cutting device for receiving the separated strips on a carrier.
The receiving device accepts a strip which is fed by the gripping device on a suitable carrier, in particular a corresponding sheet, that is to say a flexible carrier means which is suitable, in particular, for winding up, in order to configure a corresponding wound reel which can be processed further subsequently in a downstream processing device, and the individual cut strips with the elements or RFID chips can be unwound again, removed and introduced into tires in a corresponding processing device, for example a tire building machine.
It is conceivable here that, in the receiving device, the carrier which is occupied by the strip is covered by way of a further carrier, that is to say a second sheet, with the result that the strips are arranged between the two carriers. This second carrier or sheet is not mandatory, however.
Furthermore, the receiving device can comprise a winding device, or a winding device can be connected downstream of this receiving device, in which winding device the carrier or carriers occupied by the strips is/are wound, as has already been described, to form a reel.
Further advantages and particulars of the present invention arise out of the exemplary embodiment described in the following and also from the associated drawings.
In the drawing:
The material web 3 is an endless web consisting of an upper layer 3a and a lower layer 3b made from a rubber strip and magnetically couplable elements 8, preferably RFID chips, as an alternative metal strips or magnets, which are received or embedded in between. The cutting lines 9 which run obliquely here and along which the material web 3 is cut in order to form the strips 2 are shown using dashed lines.
The cutting device 4 serves to this end, which cutting device 4 has a cutting blade 10 which, as shown by the double arrow 11, can be moved in a linear manner relative to the material web 3. As is indicated, the cutting blade 10 can be pivoted, as indicated by way of the double arrow 12, between the oblique position shown using solid lines according to
As stated, furthermore, a gripping device 5, comprising firstly a hold-down section 17 which fixes the material web on the blade table 14 during the cutting operation, and a magnetic element 18 which couples magnetically to an element 8, situated directly below it, of the material web 3 are provided, with the result that the cut strip 2 is attached magnetically via this to the gripping device 5 or the hold-down section 17, and can be removed via the gripping device 5. The magnetic element 18, which can be a magnetic bar which comprises a plurality of individual magnets, can be pivoted, as shown by way of the double arrow 19, and can be moved out of a non-working position into a coupling position, in which it is vertically above the element 8. The gripping device 5 itself can be moved vertically in every case, as shown by way of the arrow 20. The arrow 21 indicates that the raised gripping device 5 can be rotated in a horizontal plane about a vertical axis, while the arrow 22 indicates that a horizontal movement of the gripping device 5 can also take place. The individual degrees of freedom of movement will be described in detail in the following text.
Since the strip 2 is very narrow and has, for example, only a width of between preferably 8 and 15 mm in the case of a possible length of, for example, from 70 to 80 mm, it is necessary for the material web 3 to be fixed correspondingly with its leading end on the blade table 14 during the cutting operation, with the result that it is prevented that the material web 3 moves during the cutting operation and exact, continuous cutting is not possible. Since, on account of the small width of the strips 2 to be cut, the cutting operation necessarily has to take place very close to the free end of the material web 3, but at the same time fixing over a relatively large area of the material web 3 is also necessary, the hold-down section 17 is provided with a recess 23 in the form of an elongate slot, through which the blade 10 cuts. This embodiment of the hold-down section 17 makes it possible for the material web 3 to be fixed and held down flatly in front of and behind (as viewed in the transport direction) the actual cutting line or the cutting operation, with the result that any movement at all of the material web 3 is ruled out both during plunging down and pulling out of the cutting blade 10. That is to say, the cutting blade 10 cuts through the hold-down section 17 and there is firstly secure fixing of the material web 3 here, but secondly cutting and holding down of the very narrow strip is also possible as a consequence of the cutting operation through the hold-down section 17.
The material web 3 is shown with the embedded elements 8 or RFID chips which are shown using dashed lines, the intended cutting lines 9 also being shown here.
Furthermore, the recess 23 is shown in the form of the elongate slot which is longer than the width of the material web 3, the cutting blade 10 or the cutting edge 15 of course also being wider than the material web 3. Merely the cutting blade 10 and the pivot axis 13 which, as described, coincides with the cutting line on the blade table 14 are shown in principle, the imaginary cutting line 9 on the upper side of the material web 3 being of course correspondingly offset in angular terms with respect to the cutting line since an oblique cutting operation takes place here (starting from
Furthermore, the magnetic element 18 is shown which is shown here in the form of two separate individual magnets 24 and which is arranged exactly above a web-side element 8 in the coupling position.
Furthermore, the cut and removed strip 2 which has already been shown in
The outline illustration shows the cutting device 1 which here comprises a transport means 25 in the form of a transport belt which is assigned an advancing device 26, for example a clamping unit, which (see the double arrows 27, 28) can be closed for clamping purposes and can be moved horizontally for displacing purposes. Here, this advancing device 26 is assigned to the upper run 29 of the transport means 25. The material web 3 rests on the transport means 25. The transport belt ends adjacently with respect to, but spaced apart from, the blade table 14. A transfer table 30 is provided to bridge the gap between the transport means 25 and the blade table 14, over which transfer table 30 the material web 3 is guided.
Furthermore, the cutting blade 10 is shown in principle, which cutting blade 10 is in the cutting position here and reaches through the corresponding recess 23 in the hold-down section 17. The hold-down section 17 is lowered onto the material web 3 and clamps the latter onto the blade table 14. The magnetic element 18 couples to the web-side element 8. When the cutting blade 10 is moved back, the gripping device can raise and remove the cut strip 2.
As described, two gripping devices 5 which are denoted here by A and B are provided here. They can be moved in a plurality of degrees of freedom by way of a corresponding movement device 31, as shown in principle in
The exact work sequence will be described in the following text in relation to
As described, the cutting blade 10 can be pivoted, as indicated by way of the double arrow 12 in
Furthermore, a vertical linear guide 45 is provided on the slide 39, on which vertical linear guide 45 a holder (will be described in the following text, see
An actuating element 47 in the form of a cylinder is provided for this vertical movement, which actuating element 47 is fixed with one end on the slide 39, and the other, movable end of which actuating element 47 is connected to a pivoting lever 48 which can be pivoted about a pivot axis 49. As will be described in more detail in the following text, the other end of the pivoting lever 48 is connected to the holder which is guided on the linear guide 45, with the result that pivoting of the pivoting lever 48 necessarily leads to a vertical movement of the holder. The vertical movement is limited via corresponding stops 50.
A rotary drive 54 is arranged on the holder 51, which rotary drive 54 comprises a drive shaft 55, on which (see
In each case one linear guide element 57 is situated on the mounting plate 56, which linear guide element 57 makes horizontal linear guidance for a horizontal advance of the respective gripping element 5 or A, B possible, the latter being received such that it can be guided in a linear manner on it via a corresponding linear guide element 58. Via this, each gripping device 5 or A, B can be separately moved horizontally.
For a corresponding vertical movement, moreover, each gripping device 5, A, B can be adjusted vertically via a vertical actuating device 59. That is to say, each gripping device 5, A, B can be raised separately and vertically, and can also be displaced horizontally.
Here,
As described, the mounting plate 56 supports all the components installed on it. Since the mounting plate 56 is seated on the drive shaft 55 of the rotary drive 54, the mounting plate 56 including all the installed elements can accordingly be rotated about a vertical axis 60, as shown in
The magnetic element 18 (here, with the two magnets 24) is arranged in the interior of the housing such that it can be pivoted about a pivot axis 64. It can be pivoted out of a lowered coupling position according to
The housing 61 is provided with a corresponding fastening section 67, via which it can be fastened to the vertical actuating device 59 (see
The plate-shaped holder 70 is arranged on the blade table 14 which is of yoke-like configuration here, such that it can be pivoted about a pivot axis 72 which lies horizontally and perpendicularly with respect to the web conveying direction 34. This makes the pivoting of the cutting apparatus 35 according to the double arrow 12 from
In the next step which is shown in
In the next step which is shown in
In the next step, as shown by way of the arrow 76, the gripping device 5, A is raised. The transfer table 30 is also simultaneously raised, as is shown by way of the arrow 77. The transfer table 30 is mounted pivotably with its end which faces the transport means 25, that is to say the end which is adjacent with respect to the blade table 14 can be raised. A type of ramp is therefore configured, which ramp raises the front end of the material web 3 at the same time as the gripping device 5, A.
As
In the next step, the actual advancing operation is performed. First of all, the advancing device 26 clamps (in this regard, see
In the next step which is shown in
The cutting operation then takes place, see
This fixing action is also maintained during the time, in which the cutting blade 10 is withdrawn again (see the arrow 84 in
In the following step which is shown in
The horizontal movement, performed with regard to the advancing operation of the material web 3, of the gripping device 5 is brought about by way of the horizontal displacement of the slide 39. The raising and lowering of the magnetically coupled web end within the context of the advancing operation, as described in respect of
Firstly, the gripping device A which has already been described in respect of
As
In the next step (see
Secondly, the gripping device B at the same time moves vertically downward (see arrow 89), which takes place via the vertical actuating device 59, with the result that the hold-down section 17 of the gripping device B is lowered onto the material web 3. The advancing device 26 also likewise at the same time closes again and clamps the transport means 25.
In the following step which is shown in
In the step which is shown in
In the step which then follows according to
In the next step which is shown in
Simultaneously with this, the clamping action of the advancing device 26 is likewise once again disengaged, and the transport means 25 is released again.
As described, the vertical actuating movement which can be brought about by the holder 51 is merely relatively small. The gripping device A is situated spaced apart by further from the receiving device 6, however, than the stroke of this stroke movement takes place according to arrow 93. In order for it then to be possible for the cut strip 2 to finally be deposited, the gripping device A (see the arrow 96) is moved via the vertical actuating device 59 finally into the depositing position, in which the strip 2 lies on the carrier 7. In this position, the strip 2 is situated exactly above a magnetic element 97 which is arranged below the carrier 5 and which magnetically fixes the element 8 in the strip 2 and therefore the strip 2 itself.
In the next step which is shown in
At the same time as this, the magnetic element 18 is pivoted upward again on the part of the gripping device A, as shown by way of the arrow 99. The magnetic coupling of the magnetic element 18 to the strip-side element 8 is canceled, and the latter is then still coupled magnetically only to the magnetic element 97 of the receiving device 6.
In the next step which is shown in
The extending of the cutting blade 10 is also in turn accompanied by raising of the gripping device A, as shown by way of the arrow 101. This raising movement is brought about by way of the vertical actuating device 59.
In the step which then follows according to
At the same time, as shown by way of the arrow 103, the gripping device A moves along the horizontal linear guide, formed via the guide elements 57, 58, back into the starting position; it therefore moves away from the receiving apparatus 6. In the next step which then follows, the rotation in the horizontal plane is again brought about by the rotary drive 54, with the result that the “empty” gripping device A is rotated again above the material web 3 or the blade table 14, while the gripping device B with the previously cut strip 2 is rotated again to the receiving apparatus 6. This is shown by way of the arrow 104. At the same time, however, the slide 39 and, with it, of course all the attachment parts including the gripping devices A, B also moves counter to the transport direction again (see arrow 105), in order to subsequently initiate a new cycle. Together with the slide 39, the open advancing device 26 is also moved back again, as is shown by way of the arrow 106.
Furthermore, the synchronized transport of the carrier 7 including the strips 2 which are arranged on it then also takes place on the part of the receiving apparatus 6, in order to vacate the actual depositing position again, see the arrow 107.
A new cycle can then begin, as described above on the basis of
The carrier 7 can be a sheet, as described. As an alternative, however, it can also be a blister or a box or the like.
Furthermore, the receiving apparatus 6 can also comprise a detection device, for example a camera system which detects the depositing position and continuously makes checks, in order for it to be possible if necessary for the individual actuating movements within the entire system to be adjusted. Any defective strip can also be detected and marked as a reject via this. As a result, defective cuts can be taken from the subsequent processing chain, and an uninterrupted working chain with exactly cut strips of the required quality can be ensured.
The following
Here too, the material web 3 is an endless web consisting of an upper layer 3a and a lower layer 3b made from a rubber strip and magnetically couplable elements 8 which are received in between or embedded, preferably RFID chips, as an alternative metal strips or magnets. The cutting lines 9 which run obliquely here and along which the material web 3 is cut in order to form the strips 2 are shown using dashed lines.
The cutting device 4 serves to this end, which cutting device 4 comprises a cutting blade 10 which can be moved in a linear manner relative to the material web 3, as the arrow 11 shows. As indicated, the cutting blade 10 can be pivoted between the oblique position (shown using solid lines) according to
Furthermore, as stated, a gripping device 5 is provided, comprising firstly a hold-down section 17 which fixes the material web on the blade table 14 during the cutting operation, and a magnetic element 18 which couples magnetically to an element 8, situated directly below it, of the material web 3, with the result that the cut strip 2 is attached magnetically via this to the gripping device 5 or the hold-down section 17, and can be transported away via the gripping device 5. Here, however, the hold-down section 17 is of considerably shorter dimensions than in the case of the first embodiment. The magnetic element 18, which can be a magnetic bar which contains a plurality of individual magnets, can be pivoted, as shown by way of the double arrow 19, and can be moved out of a non-working position into a coupling position, in which it is vertically above the element 8. The gripping device 5 itself can be moved vertically in every case, as shown by way of the arrow 20. The arrow 21 indicates that the raised gripping device 5 can be rotated in a horizontal plane about a vertical axis, while the arrow 22 indicates that a horizontal movement of the gripping device 5 can also take place. The individual degrees of freedom of movement will be described in detail in the following text.
Furthermore, a hold-down element 110 is provided which is arranged in front of the gripping section, as viewed in the conveying direction of the material web 3, and which can be moved between a raised position, as shown in
Since the strip 2 is very narrow and has, for example, only a width of between preferably 8 and 15 mm in the case of a possible length of, for example, from 70 to 80 mm, it is necessary for the material web 3 to be fixed with its leading edge correspondingly on the blade table 14 during the cutting operation, with the result that it is prevented that the material web 3 moves during the cutting operation and exact, continuous cutting is not possible. Since, on account of the small width of the strips 2 to be cut, the cutting operation necessarily has to take place very close to the free end of the material web 3, but at the same time fixing of the material web 3 over a relatively large area is also necessary, the fixing of the material web takes place in the case of this embodiment by means of the hold-down section 17 and the hold-down element 110 with the formation of the clearance 112 in the form of an elongate slot, through which clearance 112 the blade 10 cuts. The arrangement of the separate hold-down components makes it possible for the material web 3 to be fixed flatly and held down in front of and behind (as viewed in the transport direction) the actual cutting line or the cutting operation, with the result that any movement of the material web 3 is ruled out both during plunging down and pulling out of the cutting blade 10.
In a similar manner to
Furthermore, the magnetic element 18 is shown which is shown here in the form of two separate individual magnets 24 and which is arranged in the coupling position exactly above a web-side element 8, just like the cut and removed, rotated strip 2.
The outline illustration shows the cutting device 1 with the transport means 25 in the form of a transport belt and the advancing device 26, for example a clamping unit. The material web 3 rests on the transport means 25. The transport belt ends adjacently with respect to, but spaced apart from, the blade table 14. A transfer table 30, over which the material web 3 is guided, is provided to bridge the gap between the transport means 25 and the blade table 14.
Furthermore, the cutting blade 10 is shown in outline, which is in the cutting position here and lies in the clearance 112. The hold-down section 17 and the flap-like hold-down element 110 are lowered onto the material web 3 and clamps the latter onto the blade table 14. The magnetic element 18 couples to the web-side element 8.
As described, two gripping devices 5 which are denoted here by A and B are provided here. They can be moved by way of a corresponding movement device 31 in several degrees of freedom, as shown in outline in
The exact work sequence will be described in the following text with reference to
With regard to further details, reference is made to the comments with respect to
With regard to the movement device 31, its construction and its function, reference is made to the illustration in
The magnetic element 18 is arranged here, with the two magnets 24, in the interior of the housing such that they can be pivoted about a pivot axis 64. They can as it were be pivoted into the two windows 114 which are open on the housing front side and provided directly above the front edge of the bottom 62, with the result that they extend as it were as far as the bottom edge and, in the lowered coupling position according to
With regard to the configuration and function of the cutting apparatus 35, reference is made to the comments in respect of
In the next step which is shown in
In the next step which is shown in
In the next step according to
As
In the next step (see
In the next step which is shown in
The cutting operation then takes place (see
After the cutting operation, that is to say when the cutting blade has cut through as far as the liner 16, it first of all remains in this position. The gripping device 5 moves up, however (see
In the following step which is shown in
The horizontal movement (performed with regard to the advancing operation of the material web 3) of the gripping device 5 is brought about by way of the horizontal advance of the slide 39. The raising and lowering of the magnetically coupled web end within the context of the advancing operation, as described with respect to
Firstly, the gripping device A which has already been described with respect to
As
In the next step (see
Secondly, the gripping device B at the same time moves vertically downward (see arrow 89), which takes place via the vertical actuating device 59, with the result that the hold-down section 17 of the gripping device B is lowered onto the material web 3. Likewise at the same time, the advancing device 26 also closes again and clamps the transport means 25. The hold-down element 110 or the flap 113 is still situated in the lowered position on the material web 3.
In the following step which is shown in
In the step which is shown in
In the step which then follows according to
In the next step which is shown in
Likewise simultaneously to this, the clamping action of the advancing device 26 is again disengaged, and the transport means 25 is released again.
As described, the vertical actuating movement which can be brought about via the holder 51 is only relatively small. The gripping device A is situated, however, spaced apart further from the receiving device 6 than the distance covered by the stroke of this stroke movement according to arrow 93. In order for it then to be possible for the cut strip 2 to be deposited finally, the gripping device A is moved via the vertical actuating device 59 (see the arrow 96) finally into the depositing position, in which the strip 2 lies on the carrier 7. In this position, the strip 2 is situated exactly above a magnetic element 97 which is arranged below the carrier 7 and which magnetically fixes the element 8 in the strip 2 and therefore the strip 2 itself.
In the next step which is shown in
At the same time as this, the magnetic element 18 is pivoted upward again on the part of the gripping device A, as shown by way of the arrow 99. The magnetic coupling of the magnetic element 18 to the strip-side element 8 is canceled, and it is then still coupled magnetically only to the magnetic element 97 of the receiving device 6.
In the next step which is shown in
As
Furthermore, the synchronized transport of the carrier 7 including the strips 2 which are arranged on it then also takes place on the part of the receiving apparatus 6, in order to vacate the actual depositing position again (see the arrow 107).
A new cycle can then begin, as described in the preceding text on the basis of
Here too, the receiving apparatus 6 can comprise a detection device, for example a camera system which detects the depositing position and continuously makes checks, in order for it to be possible for the individual actuating movements within the entire system to possibly be adjusted. Any defective strip can also be detected and marked as a reject via this. As a result, defective cuts can be taken from the subsequent processing chain, and an uninterrupted working chain with exactly cut strips of the required quality can be ensured.
As an alternative to the flap 113, the hold-down element 110 can also be configured as a linearly movable bar which, via a linear guide, can be placed, for example, vertically from above onto the material web and can be raised, and is likewise controlled via an actuating element. The bar also acts with a narrow edge on the material web 3, with the result that there is only linear contact which brings about little adhesion.
The cutting blade is either an ultrasonic blade or a heated cutting blade. The two blade types can be used in both embodiments or alternatives of the cutting device.
While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2021 108 795.3 | Apr 2021 | DE | national |
| 20 2021 101 889.5 | Apr 2021 | DE | national |
