Manufacturing machine for manufacturing a rod-shaped product from a circulating strand of strip material bonded into a tube

Abstract

The invention relates to a manufacturing machine (1) for manufacturing rod-shaped products (3) from a circulating strand (9) of a circulating strip (2) which is bonded into a tube, having a device (15) for applying a glue track (13) to the strip (2), a gauge section (10) in which the circulating strip (2) can be shaped by forming and bonding into the circulating strand (9), and a cutting device (4) which cuts the rod-shaped products (3) from the circulating strand (9) in predetermined lengths, wherein the device (15) for applying the glue track (13) is formed by a device (15) which applies glue intermittently with the formation of glue-free sections (14) which are arranged particularly regularly at intervals, and is provided with a sensor device (7) which is aimed at the circulating strip (2) or the circulating strand (9) and generates a signal depending on the passage of a glue-free section (14), and the device (15) for applying the glue track (13) is set up to vary the length of the glue-free sections (14) in the longitudinal direction of the glue track (13).

Description

TECHNICAL FIELD

[0001] The invention relates to a manufacturing machine for manufacturing rod-shaped products from a circulating strand of adhesive tube-shaped strip material according to the invention, and to a method for manufacturing rod-shaped products with the manufacturing machine according to the invention, and to a product cut from a circulating strand of adhesive tube-shaped strip material according to the invention.

[0002] Such strip material can be, for example, a paper strip or a wrapping strip, as it is used, for example, in devices for manufacturing products of the tobacco processing industry, like, for example, cigarettes or filter segments. The paper strip or the wrapping strip is supplied to the device in the form of a circulating strip, for example, with a glue track provided on one of the edges by means of the device, and is then folded into a tube in a forming section, and finally, for example, at the edges, is glued into a circulating tube-shaped strand. Depending on the application case, a circulating strip of filter material or tobacco fibers can also be laid before the forming process, which then fills the cavity in the tube-shaped strand. Another application case is the manufacture of drinking straws, in which a harder strip material formed from a food-compatible material is deliberately used, and from which, after the forming process and the gluing, the tube-shaped drinking straws are cut out in a predetermined length by means of a cutting device. BACKGROUND

[0003] In general, with the manufacturing machine according to the invention, tube-shaped segments of a predetermined length can be cut from the tube-shaped circulating strand.

[0004] A device for applying a glue track to a circulating strip material used in such a superior manufacturing machine is known, for example, from DE 10 2014 213 858 B3.

[0005] The device for applying a glue track comprises a nozzle held on the device, by means of which a glue track is applied to a roller that is driven in rotation for a rotational movement, which roller itself applies or scrapes the glue track to one of the edges of the strip material. Depending on the type of adhesion, the glue track can be applied to the strip material in a width of 1 or 2 mm or also over the entire width, for example, in a width of 5 to 35 mm or 5 to 28 mm. The nozzle is arranged eccentrically with a spacing of 0.05 to 0.15 mm relative to the rotational axis of the roller. Thereby, at the opening of the nozzle, an accumulated glue reservoir is formed in the intermediate space to the roller, the volume of which can be changed by the spacing of the nozzle, the volume flow of the expelled glue and the rotational speed of the roller, i.e. the output of the glue. The advantage of this solution is that the glue is applied to the roller as a glue track of constant width and thickness before being applied to the strip material, so that the glue track applied to the strip material has a significantly improved quality in terms of the thickness and width to be adhered to.

[0006] After the adhesive bead has been applied, the adhesive bead dries automatically, wherein the drying is additionally supported or ensured by a heat source which is aligned with the adhesive bead or the shape-fixed tubular strand or a drying section to be passed through, until the product is finally cut off from the circulating strand in a predetermined length by means of a cutting device.

[0007] Since the product is cut off from the circulating strand and the adhesive bead is likewise applied to the strip as a circulating adhesive bead and bonded into a circulating adhesive seam, the cutting device is forced to cut through the adhesive seam when cutting off the product from the circulating strand. This can lead, in particular when the adhesive seam has not yet completely dried, to small particles of the adhesive adhering to the knives of the cutting device mixed with grinding particles of the knives or dust from the surroundings when cutting the strand. These adhering particles can subsequently impair the quality of the cut surface of the product or generally contaminate the product to be subsequently cut and are also referred to as so-called "black particles". SUMMARY

[0008] Against this background, it is the task of the present invention to provide a manufacturing machine and a method which enable the cutting of the product while avoiding the disadvantages set out at the outset, while at the same time improving the quality of the product. Furthermore, it is the task of the present invention to provide a rod-shaped product cut from a circulating strand of a circulating strip bonded into a tube, which has an improved quality of the interface.

[0009] In order to solve this task, a manufacturing machine according to the invention and a method according to the invention are proposed. Furthermore, a rod-shaped product cut from a circulating strand of a circulating strip bonded into a tube is proposed according to the invention. Further preferred embodiments can be gathered from the claims, the drawings and the description pertaining thereto.

[0010] According to the basic idea of the present invention, it is proposed according to the invention that, in the manufacturing machine, a device for applying an adhesive bead is formed by a device which applies adhesive intermittently with the formation of glue-free sections arranged at regular intervals, and is provided with a sensor device which is aligned with the circulating strip or the circulating strand and generates a signal depending on the passage of the glue-free sections, and the device for applying adhesive is provided for adjusting and / or changing the length of the glue-free sections in the longitudinal direction of the adhesive bead.

[0011] By the proposed solution the length of the glue-free sections in the longitudinal direction of the glue track can be adjusted in such a way that they have a predetermined optimized length. In addition to the length, in particular, the arrangement of the glue-free sections, i.e. the spacing of the glue-free sections from one another, can also be adjusted in such a way that the cutting device cuts the rod-shaped product from the circulating strand by means of the cut through the glue-free sections. The compliance of the length and in particular the position of the sections from one another can then be monitored by means of the signal of the sensor device, which can be utilized in addition to the adjustment of the arrangement and the length of the glue-free sections at the start of the device. When adjusting the device for applying the glue track manually, the signal of the sensor device can be displayed or rather perceived, for example by means of a suitable display device, so that the operator can then adjust the length and the position of the glue-free sections in the glue track taking into account the signal of the sensor device. In addition, the proposed intermittent glue application generally has the advantage of improving the application pattern of the glue track, since the glue at the discharge opening of the nozzle is regularly completely removed by interrupting the glue supply at regular time intervals. In this way, the formation of glue droplets on the discharge opening, which are disadvantageous for the application pattern of the glue track, can be prevented.

[0012] According to an improvement, the device for applying glue has a control device for adjusting and / or varying the duration of the interruptions, i.e. the beat of the glue application. By adjusting and / or varying the length of the interruptions of the glue application, the length of the glue-free sections in the glue track is directly changed in combination with the conveying speed of the strip. Here, the beat can be controlled in such a way that the glue-free sections themselves have a predetermined length and, in addition, the beat can be controlled in such a way that the glue-free sections from one another each have a spacing corresponding to the length of the product to be cut off. In this way, it is ensured that the cutting device, when cutting, cuts through the glue-free sections and is thereby not contaminated with glue, the cutting device likewise being adjusted in terms of cutting frequency for the length of the product to be cut off.

[0013] In addition, the length and / or the position of the glue-free sections can alternatively or also additionally be changed in that the device for applying glue has a nozzle, the spacing of which from the glue track to be applied can be changed. By means of the variable spacing of the nozzle, the application pattern of the glue track onto the strip can be actively changed. The nozzle or, in the case of a plurality of nozzles, all or a part of the nozzles can be separated from the glue supply and combined with the glue supply again after a predefinable time interval.

[0014] Here, the device for applying the adhesive can in particular have a rotationally driven roller, the nozzle of the device applies the adhesive bead to the roller, and the roller applies the adhesive bead further to the edge of the circulating strip. The adhesive bead is thus not applied directly by the nozzle to the strip, but first to the roller, which then applies the adhesive bead to the strip in an improved application pattern. This makes it possible for the adhesive bead on the strip to have no run-off drops of adhesive, which can arise through the residual portion of adhesive adhering on the nozzle when the adhesive bead is applied directly to the strip. By the proposed solution the adhesive is first smeared into an adhesive bead of constant width and thickness on the roller and only then applied by the roller to the strip. As long as the device has a change in the nozzle-to-adhesive-bead spacing, which here is the spacing between the discharge opening of the nozzle and the adhesive bead applied on the roller, while the roller-to-strip spacing or contact is constant. But because the geometry of the adhesive bead applied on the roller also corresponds to the geometry of the adhesive bead applied to the strip, in this case the application pattern of the adhesive bead on the roller and also of the adhesive bead on the strip can be changed by changing the nozzle-to-roller spacing. Because the roller-to-strip spacing or contact is constant, the nozzle-to-strip spacing is also changed here indirectly. The roller is in fact only an "intermediate piece" for transferring the adhesive discharged from the nozzle to the strip, the spacing of which relative to the strip is changed.

[0015] Here, the nozzle can preferably have an edge section defining the discharge opening and projecting in the direction of the roller, which edge section is arranged on the edge of the discharge opening arranged downstream with respect to the direction of rotation of the roller. By the projecting edge section on the edge of the discharge opening arranged downstream, the gap width between the edge of the discharge opening and the roller, through which the adhesive discharged from the nozzle is carried away, is intentionally reduced, so that the adhesive on the discharge opening is intentionally built up into an adhesive reservoir, from which the adhesive is then carried away by the roller. The adhesive reservoir forms a container from which the adhesive is continued to be applied to the roller even if the adhesive supply through the nozzle is stopped or interrupted. Thereby it is also possible to achieve adhesive-free sections of very short length of 4 mm and less in the case of adhesive types of high viscosity, which would otherwise not be feasible due to the mechanical limits of the closing mechanism of the adhesive supply at conveying speeds of the circulating strand of 100 m / min and more by carrying away the adhesive without an adhesive reservoir.

[0016] Here, alternatively or additionally, the formation of the reservoir layer can also be supported in that the nozzle is arranged eccentrically with respect to the axis of rotation of the roll, with the center of the discharge opening being arranged against the direction of rotation of the roll. By the eccentricity of the nozzle, the spacing between the roll and the edge of the discharge opening arranged downstream in the direction of rotation of the roll is reduced. At the same time, the free space between the roll and the discharge opening is increased, in which the reservoir layer accumulates, and which is arranged upstream of the narrow point between the edge of the discharge opening arranged downstream and the roll with respect to the direction of rotation.

[0017] Furthermore, it is proposed that the roll is driven counter to the conveying direction of the endless strip. Thus, the roll is driven such that the strip passes next to the roll against the rotational movement of the roll, so that the relative speed of the strip with respect to the roll is obtained from the sum of the conveying speed of the strip and the circumferential speed of the peripheral surface of the roll, which has the bead arranged thereon. By this increased relative speed of the strip with respect to the roll, the glue is applied on the strip at a higher speed. Thereby, the bead on the roll is applied to the strip to form a finer and in particular thinner bead.

[0018] Furthermore, it is proposed that the glue has a viscosity of more than 230 mPas and in particular more than 1000 mPas. Thus, the glue is a highly viscous glue and thereby can be applied to the strip as a bead with a very high shape accuracy. Thereby, in particular, dripping or other quality disadvantages in the uniformity of the distribution of the glue can be avoided. Furthermore, the use of a highly viscous glue has the advantage that the bead hardens or dries more quickly after bonding the edges of the strip, so that the drying section to be passed by the endless strip after bonding can be designed more short or in other words additional measures for hardening the bond seam can be designed more simply or even cancelled. Here, even for such a highly viscous glue, a very short glue-free section of for example 4 mm and less can be achieved, which is achieved by applying the glue intermittently and additionally forming a reservoir layer, from which the glue continues to be applied over a short section after the glue supply is interrupted in order to shorten the glue-free section.

[0019] Furthermore, it is proposed that a sensor device is arranged between the form section and the cutting device. The sensor device is thereby aligned with respect to the conveying direction of the strip upstream of the cutting device to the shape-fixed endless strip. Since the sensor device as well as the cutting device are arranged position-fixed on the manufacturing machine, the cutting device is also in a fixed spatial association with the sensor device, so that from the signal of the sensor device it can also be derived, when a glue-free section of the bond seam passes the cutting device or in other words whether the knife of the cutting device which cuts through the strip also cuts through a glue-free section of the bond seam, taking into account the conveying speed of the strip. Here, it is particularly advantageous that the shape of the strip is not changed in the form section in addition to the conveying after the adhesive bead.

[0020] It is further proposed here that the sensor device in this case is a high-frequency sensor device, which can also detect the glue-free section by the position of the outwardly covering adhesive joint of the tubular bead. It is alternatively proposed that the sensor device is arranged between the device for applying the glue bead and the gauge section. The advantage of this solution is that the bead has not yet closed at the point in time at which it passes the sensor device, and the adhesive joint is thereby exposed to the outside. It is thereby possible to use a simpler, less expensive sensor device, like for example an optical sensor device, and in addition it is possible to detect the glue-free section with greater precision.

[0021] Furthermore, according to the application, a method for operating a manufacturing machine according to the application is proposed, for which method the device for applying the glue bead is manipulated in accordance with the signal of the sensor device for adjusting and / or changing the length of the glue-free section. The advantage of this solution is that the signal of the sensor device can also be used to automate or semi-automate the regulation or control of the manufacturing machine, wherein the device for applying the glue bead is manipulated in accordance with the signal of the sensor device in order to adjust and / or change the length of the glue-free section. It is thereby also possible to change the orientation and length of the glue-free section in the glue bead online, that is to say during operation of the manufacturing machine, without manual intervention being required for this purpose to carry out the adjustment. Here, the adjustment can be triggered automatically when the deviation of the actual value from the theoretical value determined via the sensor device exceeds a predetermined tolerance value. Alternatively, the adjustment can also be triggered manually, but carried out automatically.

[0022] Here, the adjustment and / or change of the length of the glue-free section is preferably brought about by the adjustment and / or change of the duration of the interruption of the glue application and / or by the adjustment and / or change of the spacing of the device for applying the glue bead to the strip. Furthermore, it is alternatively or additionally proposed that the manufacturing machine is configured in accordance with various embodiments of the application, and the adjustment and / or change of the length of the glue-free section is controlled by the adjustment and / or change of the rotational speed of the roll.

[0023] The method can be further improved in terms of process capability by improved glue application in such a way that the strip is conveyed at a conveying speed of more than 100 m / min without this resulting in disadvantages for the quality of the interface and the adhesive joint.

[0024] Furthermore, to solve the task, a rod-shaped product is proposed which is cut from a loop strip of a looped strip material which is bonded into a tube with a bond seam which is interrupted by a glue-free section, and which is cut from the loop strip by a cut through one of the glue-free sections. With the proposed solution, the product has a high-quality interface, since the interface is not contaminated with glue particles and grinding or dust particles adhering thereto as a result of the cut through the glue-free section. Here, the glue-free section should have a length which is as short as possible, so that the product is still bonded over a length which is as large as possible. The glue-free section is separated by the cut, so that the remaining length of the glue-free section on the end of the product is always formed only by a partial section of the original glue-free section, i.e. significantly shorter.

[0025] In particular, the bond seam can be formed from a high-viscosity glue having a viscosity of more than 230 mPas and preferably more than 1000 mPas, so that a very strong bond seam can be achieved with very high shape accuracy, in particular in the region of the glue-free section.

[0026] Furthermore, it is proposed that the product is formed from a food-compatible material. Thereby, it can be achieved that the rod-shaped product is also used for sucking up, storing and transporting food in general. Thus, the product can be used, for example, as a drinking straw or also as a packaging for food. BRIEF DESCRIPTION OF DRAWINGS

[0027] The application is explained below with the aid of preferred embodiments with reference to the drawings. Herein are shown:

[0028] Figure 1 A device according to the application is shown in a schematic view, and

[0029] Figure 2 An enlarged partial view of the device is shown from the loop strip, and

[0030] Figure 3 An enlarged sectional view of a device for applying glue is shown. DETAILED DESCRIPTION

[0031] In Figure 1 A schematic view of a manufacturing machine 1 according to the application can be seen in which a looped strip material 2, for example in the form of a paper strip, is supplied to the manufacturing machine. The strip material 2 is bonded into a tube with a bond seam which is interrupted by a glue-free section in a glue application device 3. The tube is cut into a rod-shaped product 4 by a cutting device 5 which cuts through one of the glue-free sections. Figure 2 and 3The device 15 for applying the glue channel 13 can be seen next to the strip 2. After the glue channel 13 has been applied, the strip 2 is introduced into a sizing section 10 in which the edges of the strip 2 are folded upwards, stacked one above the other and finally connected to one another by the glue channel 13 in the form of an adhesive seam and are fixed in shape into a tubular endless strand 9. Attached to the sizing section 10 is a drying section 11 which can be provided with additional drying units, for example a heat source. The drying section 11 is designed in such a way that the adhesive seam is dried to such an extent after it has exited from the drying section 11 that the adhesive seam can no longer be loosened in the following process. After it has exited from the drying section 11, the fixed-in-shape tubular strand is guided past a cutting device 4 which cuts the rod-shaped products 3 from the strand 9 in predetermined lengths. The cutting device 4 comprises a rotating knife holder which has one or more radially protruding knives 8 which cut through the strand 9 at defined time intervals by the rotational movement of the knife holder and thereby cut the products 3 from the strand 9 in predetermined lengths, taking into account the conveying speed of the strand 9. Such products 3 can be, for example, drinking straws, preform products 3 of the tobacco industry, preform products 3 of "heat-not-burn" products or also electronic cigarette products. In this respect, the manufacturing machine 1 corresponds to the manufacturing machines 1 known from the prior art.

[0032] The manufacturing machine 1 according to the application differs from the prior art in that the device 15 for applying the glue channel 13 is configured as an intermittent application device and additionally provided with at least one sensor device 7 which is aligned to the strip 2 or the strand 9 as will be explained in more detail below.

[0033] In Figure 2 The strip 2 and the device 15 for applying the glue channel 13 can be seen from above. The device 15 applies the glue channel 13 to the edges of the strip 2 intermittently, that is to say in the form of predetermined lengths of glue-free sections 14. The strip 2 is then rolled up and bonded into a tubular strand 9 in which the two edges of the strip 2 are connected to one another by regularly interrupted adhesive seams of the glue channel 13 and the glue-free sections 14.

[0034] Depending on how the strip 2 is to be bonded into the tubular strand 9, the device 15 can apply the bead 13 to the strip 2 in different widths up to a full-surface bead application. Here, it is also possible to bond a plurality of strips 2 into the strand 9 in a plurality of layers. Furthermore, a sensor device 7 is provided, which is either arranged between the gauge section 10 and the device 15 for applying the bead 13 and aligned to the edge of the strip 2 provided with the bead 13 or, as an alternative, between the gauge section 10 and the cutting device 4 and aligned to the bond seam in the strand 9. The sensor device 7 is constructed such that it generates a signal in relation to the passage of the beadless section 14 in the bead 13 or in the bond seam, from which the length of the beadless section 14 can be inferred. Furthermore, the sensor device 7 is in a fixed spatial relationship with respect to the cutting device 4, so that, taking into account the conveying speed of the strip 2 or strand 9, an inference can also be made as to when the detected beadless section 14 passes the cutting device 4.

[0035] As can be seen in Figure 1 , a control unit 12 is additionally provided on the manufacturing machine 1, to which the signals of the sensor device 7 are supplied. Furthermore, the control unit 12 is additionally connected by means of signal technology to the device 15 for applying the bead 13 and to the cutting device 4 and to not shown driving devices of the strip 2 or strand 9. The control unit 12 can also comprise display means and input units, which enable the display of the acquired characteristic quantities and the input of corresponding control commands.

[0036] The operating personnel can thus adjust the manufacturing machine 1 in a one-off or regularly repeated adjustment process. Here, the operating personnel can identify the point in time at which the beadless section 14 passes the cutting device 4 by means of the signals acquired by the sensor device 7, which are displayed by means of an analysis taking into account the conveying speed. The operating personnel then adjusts the manufacturing machine 1 such that the beadless section 14 just passes the cutting device 4 when the cutting device 4 cuts through the strand 9 with the knife 8. In another embodiment, the adjustment can also be carried out in a fully automated control method online, i.e. during the operation of the manufacturing machine 1, so that no manual intervention or manual actuation is required to trigger the adjustment process. The adjustment of the length and position of the beadless section 14 in the bead 13 is carried out by actuating the device 15, which will be explained in detail below.

[0037] In Figure 3A cross-section of a device 15 for coating the glue channel 13 through which the strip 2 is guided is shown in an enlarged view. The device 15 comprises a nozzle 5 with a discharge opening 17 from which the glue is discharged and a roller 6 which is driven in rotation in the direction of the arrow for a rotational movement. The glue discharged from the discharge opening 17 is applied to the roller in the form of a glue channel 13. The glue channel 13 is then coated or spread on the edge of the strip 2 by the roller 6. Here, the roller 6 is driven counter-clockwise in the illustration, while the strip 2 moves vertically downwards. Thereby, an opposite movement of the strip 2 and the roller 6 is generated on the right edge of the roller, i.e. on the following edge of the roller 6 along which the strip 2 is guided. Thus, the relative speed between the strip 2 and the peripheral surface of the roller 6 is derived from the sum of the conveying speed of the strip 2 and the peripheral speed of the roller 6, and the glue is applied to the strip 2 with a correspondingly increased relative speed.

[0038] In order to control the length and the position of the glue-free section 14 in the glue channel 13, the intermittent device 15 can be so manipulated that the duration of the interruption of the glue supply and the beginning and the end of the interruption of the glue supply are changed, while the remaining parameters remain constant.

[0039] The nozzle 5 is arranged eccentrically offset with respect to the rotational axis of the roller 6 upstream of the rotational movement of the opposite peripheral surface of the roller 6, i.e. counter to the conveying direction of the strip 2, with the center of the discharge opening 17 at a dimension E. Furthermore, the nozzle 5 has a projecting edge section 16 on its lower edge 18 in the illustration, i.e. arranged downstream with respect to the peripheral movement of the roller 6, in the direction of the roller 6, by which edge section the distance A between the edge 18 of the discharge opening 17 and the roller 6 is reduced and a constriction is formed. By the constriction, the glue is applied to the peripheral surface of the roller 6 in the glue channel 13 with a correspondingly reduced thickness, and is carried away from the roller 6 before the glue is applied to the strip 2 as the glue channel 13.

[0040] Due to the reduced spacing A, the glue discharged from the discharge opening 17 accumulates into a glue reservoir 19 before it is carried away through the narrow point. This intentionally formed glue reservoir 19 has the advantage, in combination with the intermittent glue supply through the nozzle 6, that the length of the glue-free section 14 can be reduced to a length of 4 mm and less, especially in the case of high-viscosity glue having a viscosity of 230 mPas and especially 1000 mPas and more, which would otherwise not be feasible at high conveying speeds of the strip 2 with such high-viscosity glue. This is achieved by intentionally first establishing the glue reservoir 19 during the glue supply. From the point in time at which the glue supply is interrupted, the glue is then further applied from the glue reservoir 19 to the roller 6 and thus to the strip 2 until the glue reservoir 19 is also emptied. The glue application onto the strip 2 only ends thereafter, so that the temporal and positional start of the glue-free section 14 on the strip 2 can be consciously further delayed relative to the interruption of the glue supply. This temporal delay in turn depends on the volume of the glue reservoir 19, which can in turn be changed by a reduction or an increase of the spacing A. Since the roller 6 is supported positionally fixed with its axis of rotation and the strip 2 is arranged with a constant spacing or contact to the strip, the spacing of the nozzle 5 to the strip 2 also changes. As long as the glue channel 13 is applied directly by the nozzle 5 to the strip 2, the start and the length of the glue-free section 14 can also be achieved in the same way by the formation and the change of the glue reservoir 19, which is formed directly between the nozzle 5 and the strip 2.

[0041] The volume of the glue reservoir 19 and thus the temporal delay of the interruption of the glue application can be controlled in that the glue reservoir 19 is accumulated to a larger volume by the reduction of the spacing A. Alternatively or additionally, the volume of the glue reservoir 19 and thus the glue application and also the length of the glue-free section 14 can be controlled directly by changing the rotational speed of the roller 6.

[0042] Controlling the length of the glue-free section 14 by changing the spacing A of the nozzle 5 to the roller 6 has the advantage, among others, that the length of the glue-free section 14 can be reduced to a length of less than 4 mm, especially to a length of 2-3 mm, which is not feasible for mechanical reasons at high conveying speeds of the strip of 100 m / min and especially more than 400 m / min only by controlling the temporal interruption due to the inertia of the closing mechanism in the intermittent device 15.

[0043] However, the glue application by the shown roller 6 has the further advantage that the nozzle 5 is not in contact or can be in contact with the strip 2 and thus does not suffer from wear. This is especially advantageous since the nozzle 5 is a relatively expensive component, so that the costs for the maintenance of the manufacturing machine 1 can be reduced since the required replacement intervals of the nozzle 5 can be significantly lengthened.

[0044] Furthermore, the glue application by the roller 6 also enables a clean glue application on very porous paper and, in particular, avoids undesirable glue penetration through the paper. Furthermore, the glue is applied contactlessly from the nozzle 5 to the roller 6, so that an arbitrary amount of glue can be applied to the roller 6 both in height and in width and can finally be applied further by the roller 6 to the strip 2. Thus, for example, a glue amount of 150 g / 500 m can be applied to the strip 2, which cannot be achieved in the desired quality by applying the glue directly to the strip 2 via the nozzle 5.

[0045] Furthermore, the glue application by the roller 6 also enables a clean glue application on very porous paper and, in particular, avoids undesirable glue penetration through the paper. Furthermore, the glue is applied contactlessly from the nozzle 5 to the roller 6, so that an arbitrary amount of glue can be applied to the roller 6 both in height and in width and can finally be applied further by the roller 6 to the strip 2. Thus, for example, a glue amount of 150 g / 500 m can be applied to the strip 2, which cannot be achieved in the desired quality by applying the glue directly to the strip 2 via the nozzle 5.

[0046] Here, the glue channel 13 can be configured very narrowly and applied to one of the edges, so that the products 3 are bonded only by a very narrow adhesive seam in the thin edge section of the overlapping edges. If a more robust adhesive seam or also a more rigid product 3 is to be produced, the glue channel 13 can also be applied more widely up to the entire width, i.e. applied full-surface, and the products 3 can be shaped in this case by overlapping and bonding edges with a wider edge section to a higher shape stability with a smaller diameter.

Claims

1. A manufacturing machine (1) for manufacturing rod-shaped products (3) from a circulating strip (9) of a circulating strip material (2) which is bonded into a tube, having - a device (15) for applying a bead (13) to the circulating strip material (2), - a gauge section (10) in which the circulating strip material (2) can be shaped by forming and bonding into the circulating strip (9), and - a cutting device (4) which cuts the rod-shaped products (3) from the circulating strip (9) in predetermined lengths, characterized in that - the device (15) for applying the bead (13) is formed by a device (15) which applies the adhesive intermittently with regularly spaced-apart adhesive-free sections (14) being formed, wherein the adhesive has a viscosity of more than 230 mPas, - and a sensor device (7) is provided which is aligned to the circulating strip material (2) or the circulating strip (9) and generates a signal depending on the passage of an adhesive-free section (14), wherein the sensor device (7) is in a fixed spatial assignment with respect to the cutting device (4), so that a conclusion can also be drawn as to when a detected adhesive-free section (14) passes the cutting device (4) taking into account the conveying speed of the strip material or strip, - and the device (15) for applying the bead (13) is provided for adjusting and / or changing the length of the adhesive-free sections (14) in the longitudinal direction of the bead (13) depending on the signal of the sensor device (7), - wherein the device (15) for applying the bead (13) has a nozzle (5) whose spacing from the bead (13) to be applied can be changed in order to control the length of the adhesive-free sections (14). The device (15) for applying the bead (13) has a control device for adjusting and / or for changing the duration of the interruption of the adhesive application. The device (15) for applying the bead (13) has a rotationally driven roller (6) to which the bead (13) is applied by a nozzle (5) and which further applies the bead (13) to the circulating strip material (2). The nozzle (5) has an edge section (16) which defines a discharge opening (17) and which projects in the direction of the roller (6), the edge section being arranged on an edge (18) which is arranged downstream with respect to the direction of rotation of the roller (6) of the discharge opening (17). The nozzle (5) is arranged eccentrically with respect to the axis of rotation of the roller (6) with the center of the discharge opening (17) being arranged against the direction of rotation of the roller (6). The roller (6) is arranged to be rotationally driven counter to the conveying direction of the circulating strip material (2). The sensor device (7) is arranged between the gauge section (10) and the cutting device (4). The sensor device (7) is a high-frequency sensor device. The sensor device (7) is arranged between the device (15) for applying the bead (13) and the gauge section (10).

2. The manufacturing machine (1) according to claim 1, characterized in that The adhesive has a viscosity of more than 1000 mPas.

3. The manufacturing machine (1) according to claim 1, characterized in that ​ 4. The manufacturing machine (1) according to claim 3, characterized in that ​ 5. The manufacturing machine (1) according to claim 4, characterized in that ​ 6. The manufacturing machine (1 ) according to any one of claims 3 to 5, characterized in that ​ 7. The manufacturing machine (1) according to claim 1, characterized in that, ​ 8. The manufacturing machine (1) according to claim 7, characterized in that ​ 9. The manufacturing machine (1) according to any one of claims 1 to 5, characterized in that, ​ 10. The manufacturing machine (1) according to any one of claims 3 to 5, characterized in that ​ 11. A method for operating a manufacturing machine (1) according to any one of claims 1 to 10, characterized in that The device (15) for applying the glue channel (13) is controlled in order to adjust and / or vary the length of the glue-free section (14) in dependence on the signal of the sensor device (7).

12. The method of claim 11, wherein, The adjustment and / or variation of the length of the glue-free section (14) is effected by adjustment and / or variation of the duration of the interruption of the glue application and / or by adjustment and / or variation of the spacing of the device (15) for applying the glue channel (13) to the endless strip (2), and / or the adjustment and / or variation of the length of the glue-free section is controlled by variation of the rotational speed of the roller (6).

13. The method according to claim 11 or 12, characterized in that, The endless strip (2) is conveyed at a conveying speed of more than 100 m / min.

14. A rod-shaped product (3) cut from a circulating strand (9) of a circulating strip (2) of adhesive pipe by a manufacturing machine according to any one of claims 1 to 10 or by a method according to any one of claims 11 to 13, characterized in that, The endless strip (2) is bonded into a tube by means of the adhesive seam which is interrupted by the glue-free section, and the product is cut from the bundle strip by a cut through one of the glue-free sections.

15. A stick product according to claim 14, characterised in that The adhesive seam is formed from high-viscosity glue having a viscosity of more than 230 mPas.

16. A stick product according to claim 14, characterised in that The rod-shaped product is formed from a food-compatible material.

17. A stick product according to claim 16, characterised in that The rod-shaped product is a drinking straw.

18. The stick product according to claim 14, characterized in that The adhesive seam is formed from high-viscosity glue having a viscosity of more than 1000 mPas.

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