EP3440946A1 - Machine for the tobacco processing industry for simultaneously producing a number of strands - Google Patents

Abstract

Describe is a multiple-rod machine of the tobacco processing industry, in particular double stranding machine, for simultaneous production of multiple strands, especially filter strands or tobacco strands, with a web delivery device (2), which is formed, in particular paper, plastic film, metal foil and / or tobacco foil exhibiting, web-shaped material (10; 10a, 10b) and a downstream downstream multiple strand former (24) configured to form a plurality of strands from the sheet material (10; 10a, 10b) and one between the material web supply device (2) and the multiple strand former ( 24) arranged crimping device (20), which is designed to crimp the provided by the web delivery means (2) web-like material (10a, 10b) for all of the multiple strand forming means (24) to be formed strands together.

Description

The invention relates to a multi-strand machine of the tobacco-processing industry, in particular double-strand machine, for the simultaneous production of several strands, in particular filter strands or tobacco strands, with a material web providing device which is designed to provide, in particular paper, plastic film, metal foil and / or tobacco foil having web-like material, and a downstream downstream multiple strand forming device configured to form a plurality of strands of the sheet material.

It is an object of the present invention to modify a multi-strand machine of the type mentioned above, that in a simple manner from the web-shaped material provided by the web delivery device several strands provided as articles of the tobacco industry, especially filter strands or tobacco strands can be produced ,

This object is achieved with a multiple-strand machine of the tobacco-processing industry, in particular double-strand machine, for the simultaneous production of several strands, in particular filter strands or tobacco strands, with a material web providing device which is formed, in particular Paper, plastic film, metal foil and / or tobacco foil having, to provide web-like material, and a downstream downstream multiple stranding device, which is formed from the web material to form a plurality of strands, and arranged between the web delivery device and the Mehrfachstrangbildungseinrichtung crimping device, which is formed web-shaped material provided by the web supply means for all of the strands to be formed by the multiple strand former together to crimp.

By using a crimping device, the sheet-like material can be produced in a particularly simple manner into a strand by first being crimped by the crimping device and then being crumpled or pressed into a strand. By virtue of the fact that, according to the invention, the crimping device is designed to crimp the web-like material together for all of the strands to be formed by the multiple stranding device, the crimping process can be simplified and drives can be saved. Furthermore, the construction according to the invention also makes it possible to save on the footprint of the multi-strand machine.

Preferred embodiments and further developments of the invention are specified in the dependent claims.

In a preferred embodiment, the crimping means comprises a single crimping roller or pair of crimping rollers, the single crimping roller or crimping roller pair being configured to crimp together the sheet material provided by the web supply means for all of the strands to be formed by the multiple stranding device.

In an alternative embodiment, the crimping means comprises a plurality of synchronously driven crimping rollers or crimping roller pairs configured to crimp together the sheet material provided by the web supplying means for all strands to be formed by the multiple stranding means.

In a further alternative embodiment, the crimping device comprises a plurality of synchronously driven crimping rollers or crimping roller pairs corresponding to the number of strands to be formed by the multiple stranding device, one crimping roller or one pair of crimping rollers each forming a web-shaped section from the web-shaped material provided by the web supply device for one of associated with the multiple strand forming device strand to be formed and is adapted to crimp this web-shaped portion.

Preferably, the web supply means is adapted to provide sheet material having a plurality of juxtaposed web-shaped sections corresponding to the number of strands to be formed by the multi-strand former, each web-shaped section being for forming a strand from a plurality of strands to be formed by the multi-strand former, and the width of the web-shaped material substantially corresponds to the sum of the widths of the web-shaped sections.

Preferably, a material web singling device is provided, which is configured to singulate the web-shaped material provided by the material web supply device into adjacent web-shaped sections, which form separate material webs, and is arranged between the material web supply device and the multiple strand forming device.

In a development of this embodiment, the material web singling device is arranged upstream of the crimping device, preferably closer to the crimping device than to the material web supply device, and more preferably also immediately upstream of the crimping device. In particular, if the material web separating device is designed as a separating device and preferably as a longitudinal cutting device, this development is particularly advantageous insofar as the severing or cutting lines along the web-shaped material can be determined exactly.

In an alternative development, the material web singling device is arranged downstream of the crimping device, wherein the web web singling device is preferably arranged either closer to the crimping device than to the multiple stranding device or closer to the multiple stranding device than to the crimping device. Accordingly, the separation of the sheet-like material can take place according to a second alternative immediately after crimping or according to a third alternative also immediately before the strand formation.

The material web singulation device preferably has a longitudinal cutting device which is designed to cut the web-like material in its transport direction.

The material web supply device preferably has means for receiving at least one reel containing web material and means for unwinding the reel.

As an alternative to providing web material having a plurality of adjacent web-shaped sections, the web delivery device may also be configured to provide the web-like material in a number of separate webs according to the number of strands to be formed by the multi-strand former. In a further development of this embodiment, the web supply means comprises means for receiving at least one reel containing web-like material divided into a plurality of adjacent webs according to the number of strands to be formed by the multi-strand former and means for unwinding the reel. After that, therefore, the sheet-like material is already provided in the form of separately formed material webs.

Preferably, a connection device is provided, which is arranged between the material web supply device and the crimping device. Conveniently, the connecting device is arranged upstream of the material web separating device.

Furthermore, a buffer device is preferably provided, which is arranged between the material web supply device and the crimping device. The buffer device has the advantage of ensuring the provision of sheet material even in the case of fluctuations in the process speed or even a brief process interruption. The buffer device is preferably arranged upstream of the material web singulation device, so that the buffer effect is used in the same way for all web-shaped sections of the web-like material or for all material webs. Furthermore, it is preferable to arrange the buffer device downstream of the connection device.

Due to the width of the material webs, a track center distance could result, which is so large that at least two separate blade carrier or even a corresponding plurality of blade carriers are to be used in a downstream cutting device. In order to prevent this, according to a further preferred embodiment, a distance reduction device is proposed, which is designed to bring at least two separate material webs, which have been formed from the web-shaped material provided by the material web supply device, from an essentially flat juxtaposed arrangement into an alignment, in that they are substantially opposite one another with one of their surfaces and whose spacing from each other is less than the distance between the center lines of the material webs from each other before entering the distance reducing device. Accordingly, in this preferred embodiment, the webs are placed in a superimposed or edgewise arrangement, the distance of which can be kept very low if necessary. Thus, this embodiment also allows the use of only one knife carrier in a downstream cutting device, so that at least two or possibly more strands can be cut together with only a single knife.

The distance reduction device is preferably designed in such a way that, prior to entry into the distance reduction device, the material webs lie next to one another substantially in a common plane.

In a further preferred refinement, the distance reducing device is designed to divert the at least two separate material webs such that they are brought into outlet planes which are preferably parallel to one another and whose spacing from each other is less than the distance between the center lines of the material webs from each other before entry into the web Abstandsreduziereinrichtung.

In a further development, the distance reduction device is designed to rotate the material webs about its center axis by 90 °, for which the distance reduction device for each material web may have a first rod-shaped deflection means and a second rod-shaped deflection means offset by 90 ° relative to the first rod-shaped deflection means.

In an alternative development, the distance reduction device for each material web has a first rod-shaped deflecting means for deflecting the material web by less than 90 °, a second rod-shaped deflecting means arranged downstream of the first bar-shaped deflecting means lying in the plane leading from the material web after leaving the first bar-shaped Deflection means is spanned, and is oriented at an angle relative to the first rod-shaped deflection means, and provided downstream of the second rod-shaped deflection third bar-shaped deflection means which lies in the plane defined by the material web after leaving the second rod-shaped deflection means and at an angle, preferably of 90 °, relative to the second rod-shaped deflection means is oriented on. Preferably, the second rod-shaped deflection means and the third rod-shaped deflection means are fixed to one another with one of its two ends.

Preferably, at least one rod-shaped deflection means is designed as a deflection bar, deflection roller or deflection roller.

Conveniently, the multiple strand forming device according to the number of strands to be formed on a number of forming shoulders, which are adapted to form the sheet material in each case to a tube. For a reduction in the distance of the strands from each other, it is advantageous to arrange the form shoulders inclined to one another such that their distance decreases in the direction of movement of the web-like material.

Furthermore, the multiple strand forming device may have a corresponding number of slices and stars in order to bundle the sheet material into strands.

According to another preferred embodiment, the multiple strand forming device has a number of fingers corresponding to the number of strands to be formed, wherein the fingers are configured to achieve at least one preforming of the strands.

Preferably, downstream of the multiple strand forming device, a format device is arranged, which is designed to provide the strands formed by the multiple strand formation device in each case with wrapping material, preferably comprising paper.

According to a preferred development, the format device has, according to the number of strands formed by the multiple stranding device, a plurality of transport paths directed toward one another in the direction of movement, so that the distance between the transport paths is smaller at their downstream end than at their upstream end. Thus, it is also possible in this development to achieve a reduction in distance between the strands, in a skilful manner by appropriate training and use of the format device.

Preferably, at least one transport path of the format device is aligned with a finger of the upstream multiple strand forming device, resulting in a particularly advantageous manner, a smooth transport of the strands.

Further, according to the number of strands to be formed by the multiple strand former, a plurality of transport paths may be provided be provided, which extend from the Mehrfachstrangbildungseinrichtung to the format device, wherein at least two of these transport paths are directed towards each other with its upstream portion adjacent to the Mehrfachstrangbildungseinrichtung towards each other and are oriented with their downstream portion adjacent to the format means parallel to each other, so that the distance of these transport paths from each other its downstream end before the format device is less than at its upstream beginning adjacent to the multiple strand forming device. Thus, the strands are already merged in or after the preforming, so they already occupy the desired reduced distance from each other in the format device and therefore can be cut together in a downstream cutting device with only one blade carrier.

The format device preferably has a common drive assigned to all transport paths, which is designed for the simultaneous transport of the strands in all transport paths. This embodiment has the advantage that separate drives can be saved.

Downstream downstream of the format device is a strand cutting device which is designed to cut the strands into bars of discrete length. In a preferred development, according to the number of strands formed by the multiple strand forming device, a plurality of transport paths are provided, which adjoin the transport paths of the format device and extend through the strand cutting device.

In this case, at least one transport path can be aligned substantially over its entire length through the strand cutting device with the associated upstream transport path of the format device. Thus, in this development, the format bands of the format device and the downstream transport paths are V-shaped to each other. However, it is possible to cut the strands at right angles if the knives on the rotating knife carrier describe a circular path whose course, orientation and diameter are adjusted accordingly.

Alternatively, it is also possible to spend at least two transport paths on their way from the format device to the strand cutting device in a parallel alignment with each other, so that these transport paths parallel to each other and at a small distance from each other by the strand cutting device.

A further preferred embodiment is characterized by an actively driven draw roller arranged between the material web supply device and the crimping device and a control device which activates the draw roll in such a way that the draw roll predetermines the desired transport speed and controls the crimping device in such a way that the transport speed in the crimping device the predetermined by the tension roller transport speed is synchronized. Thus, the tension roller specifies the web speed while the crimp is synchronized with the tension roller. Thus it is guaranteed that the exact required amount of web-shaped material is delivered to the multiple strand forming device and thus the product length remains correct according to the specification.

In a preferred embodiment, the control device is designed to synchronize the peripheral speed of the crimping roller (s) to the peripheral speed of the draw roller.

Furthermore, the control device can also be designed to synchronize the cutting operation of the strand cutting device to the transport speed predetermined by the draw roller.

A further development is characterized in that the format device has a drive device, which is provided for the transport of the strands along the transport paths, and the control device is designed to control the drive device of the format device such that the transport speed along the transport paths within the format device by one Difference value is greater than the predetermined by the tension roller transport speed.

Preferably, a web tension control device is arranged between the crimping device and the format device, which predetermines the difference value as a control factor. In this case, the web tension control device may have a dancer roller and the control device may be designed to determine the difference value from the deflection of the dancer roller. Thus, the drive device of the format device additionally receives a control factor from the deflection of the upstream dancer roller. Furthermore, the material web can be easily threaded, since a possible loop is determined during the startup of the machine by the respective dancer roller and compensated by the drive device of the format device. A looping between the webs during normal operation, for example, due to different wear of size bands in the format device is prevented by the control using the dancer roller, the value to be controlled is below the allowable length tolerance of the rods to be produced.

A further preferred development is characterized in that the format device has, in accordance with the number of strands to be formed by the multiple strand forming device, a plurality of endlessly circulating format strips which are adapted to receive and take along a strip of wrapping material and a strand along an associated transport path where they are then formed to wrap the strip of wrapping material around the strand, the drive means for circulating the format strips are provided, and the control means is arranged to set the speed of the format strips in the range of the transport paths to a value greater by the difference value as the predetermined by the tension roller transport speed. In this development, the wrapping material is drawn through the format strips and preferably supported only passive by pulling rollers without rubber rollers.

Figur 1

eine schematische Darstellung einer Mehrfach-Strangmaschine gemäß einer ersten bevorzugten Ausführung;

Figur 2

eine schematische Darstellung einer Mehrfach-Strangmaschine gemäß einer zweiten bevorzugten Ausführung;

Figur 3

eine schematische Darstellung einer Mehrfach-Strangmaschine gemäß einer dritten bevorzugten Ausführung;

Figur 4

eine schematische Darstellung einer Mehrfach-Strangmaschine gemäß einer vierten bevorzugten Ausführung;

Figur 5

einen Abschnitt einer Mehrfach-Strangmaschine mit einer zusätzlich vorgesehenen Abstandsreduziereinrichtung gemäß einer ersten Ausführung;

Figur 6

einen Abschnitt einer Mehrfach-Strangmaschine mit einer zusätzlich vorgesehenen Abstandsreduziereinrichtung gemäß einer zweiten Ausführung;

Figur 7

einen Abschnitt einer Mehrfach-Strangmaschine mit einer zusätzlich vorgesehenen Abstandsreduziereinrichtung gemäß einer dritten Ausführung in einer vollständigen Ansicht (a) und in Teilansichten (b und c);

Figur 8

einen Abschnitt einer Mehrfach-Strangmaschine zwischen einer Mehrfachstrangbildungseinrichtung und einer Einstoßtrommel gemäß einer ersten Ausführung;

Figur 9

einen Abschnitt einer Mehrfach-Strangmaschine zwischen einer Mehrfachstrangbildungseinrichtung und einer Einstoßtrommel gemäß einer zweiten Ausführung; und

Figur 10

einen Abschnitt einer Mehrfach-Strangmaschine zwischen einer Mehrfachstrangbildungseinrichtung und einer Einstoßtrommel gemäß einer dritten Ausführung.

Preferred embodiments of the invention will be explained in more detail with reference to the following drawings. Show it:

FIG. 1

a schematic representation of a multi-strand machine according to a first preferred embodiment;

FIG. 2

a schematic representation of a multi-strand machine according to a second preferred embodiment;

FIG. 3

a schematic representation of a multi-strand machine according to a third preferred embodiment;

FIG. 4

a schematic representation of a multi-strand machine according to a fourth preferred embodiment;

FIG. 5

a section of a multi-strand machine with an additionally provided distance reduction device according to a first embodiment;

FIG. 6

a section of a multi-strand machine with an additionally provided distance reduction device according to a second embodiment;

FIG. 7

a section of a multi-strand machine with an additionally provided distance reduction device according to a third embodiment in a complete view (a) and in partial views (b and c);

FIG. 8

a portion of a multi-stranding machine between a multi-stranding device and a push-in drum according to a first embodiment;

FIG. 9

a portion of a multi-stranding machine between a multi-stranding device and a push-in drum according to a second embodiment; and

FIG. 10

a section of a multi-stranding machine between a multi-stranding device and a push-in drum according to a third embodiment.

The FIGS. 1 to 4 show schematically in various embodiments a double-strand machine for the simultaneous production of two strands of the tobacco-processing industry, in particular fiber strands such as filter or tobacco strands, from this suitable web-like material. In the FIGS. 6 to 10 Details of the double-strand machine are shown in various designs. According to the figures, the production of the strands takes place from right to left in the direction of the arrows A shown in the figures, which at the same time also indicate the transport direction of the strands and of the underlying web-shaped material.

As FIG. 1 can recognize, the double-strand machine shown there has a web delivery device 2, in accordance with the in FIG. 1 shown embodiment, a turntable 4 is rotatably mounted. On the turntable 4 two bearing pins 6 are arranged at a diametrical distance from each other, which are oriented parallel to the axis of rotation of the turntable 4, not shown. The mandrels 6 are used for releasably receiving bobbins, which in FIG. 1 are denoted by the reference numerals "8a" and "8b".

In the illustrated embodiment, the reels contain 8a and 8b web-shaped material in the form of a flat wound one-piece or single-layer sheet. Since two strands are to be produced simultaneously with the double-strand machine, the film web has a width which is at least the sum of a first width needed for the production of a first strand and a second width required for the production of a second strand , corresponds to or at least a double value of that width, which is needed for the production of a single strand. For example, for the production of tobacco strands, the sheet-like material tobacco foil and for the production of filter strands paper and / or optionally also plastic film.

If the previously used "old" reel threatens to run empty, it is necessary to switch to a "new" reel, whereby this change expediently has to take place without interrupting the process and thus, as it were, seamlessly. In FIG. 1 if the bobbin 8a shown on the left is the old bobbin, from which a film web 10 is removed in the snapshot of the representation, and the bobbin 8b shown on the right shows the new bobbin, the old bobbin 8a then a corresponding new one Film web provides. In the course of the change from the old reel 8a to the new reel 8b, the turntable 4 is rotated in the view of FIG. 1 counterclockwise, whereby the new bobbin 8b takes over the position of the old bobbin 8a and the old bobbin 8a is moved to the position of the new bobbin 8b to be replaced there with another new bobbin, which then on the associated bearing mandrel is put on.

Of course, it is also conceivable in principle to dispense with the use of the turntable 4 and to arrange the bearing mandrels 6 stationary. It is also basically conceivable alternative to provide only a single bearing pin 6, which, however, then causes the Bobinenwechsel a brief interruption of the provision of the film webs result, but which could be collected by a downstream buffer memory.

Furthermore, the material web providing device 2 has a connecting device 12, the task of which is to attach the new film web to the old film web in the course of the reel change.

From the web delivery device 2, the film web 10 is pulled by means of a Zugwalzenpaars 14 in a buffer memory 16, which in the illustrated embodiment according to FIG. 1 consists of a loop memory.

With respect to the direction of movement of the film web 10 according to arrow A downstream is in the illustrated embodiment according to FIG. 1 a material web singling device 18 is provided, which is formed in the illustrated embodiment as a longitudinal cutting device to the double-width single-layer or one-piece film web 10 centrally separated or cut into two single-width film webs 10a, 10b. The material web singling device 18 has a pair of draw rollers 18a, which ensures that there is still double-wide single-layer or one-piece film web 10 is pulled out of the buffer memory 16, and a knife 18b, which is formed in the illustrated embodiment as a disc. The to be separated film web 10 is guided between the one roller of the Zugwalzenpaares 18 a and the blade 18 b, as FIG. 1 can be seen schematically.

The individual film webs 10a, 10b emerging from the material web singling device 18 are fed in a juxtaposed arrangement to a crimping device 20, which in accordance with FIG FIG. 1 a single pair of rollers 22, wherein at least one roller of this roller pair 22 is formed as a crimping roller. Since the two separated film webs 10a, 10b are guided in juxtaposed arrangement by the crimping device 20 to be crimped there simultaneously and together, the roller pair 22 has a width which corresponds to at least twice the width of a film web.

Thus, at the in FIG. 1 illustrated embodiment, the web separation device 18 upstream of the crimping device 20 is arranged. Preferably, the material web singling device 18 should be arranged closer to the crimping device 20 than to the web delivery device 2, so that the separation of the double-width film web 10 into two singly wide separated film webs 10a, 10b takes place substantially immediately before crimping, as well FIG. 1 can be seen schematically.

In principle, however, it is alternatively also conceivable to arrange the material web singling device downstream of the crimping device 20, preferably either in such a way that the singling takes place immediately after crimping or in such a way that the singling takes place immediately before the preforming into a strand.

After emerging from the crimping device 22, the two individual film webs 10a, 10b are spatially separated from each other in the illustrated embodiment and fed to a double strand forming device 24. The double-stranding device 24 has for the first separated film web 10a a first forming shoulder 26a, which spans the film web 10a from its hitherto flat spread state into a strand-like preformed state, other components not shown in the figure, such as a star and a disk containing the film web 10a further compress or -knüllen, and a downstream first finger 28a, in which the film web solidified into a strand and from which then the resulting strand is issued. In a corresponding manner, a second forming shoulder 26b and a second finger 28b as well as other elements, not shown in the figures, such as a disk and / or a star are provided in the double-stranding device 24 for the second separated film web 10b to also the second separated film web 10b from a to spend flat spread state in a strand form.

With regard to the transport direction of the strands formed from the film webs 10a, 10b according to arrow A downstream of the double stranding device 24, a format device 30 is provided to envelop the strands with, preferably paper exhibiting, wrapping material. For this purpose, the format device 30 for processing the first strand has an endlessly circulating first format strip 32a, which is set in circulating motion by a first drive 34a. Furthermore, an elongate first shaping body 36a is provided, through which, preferably substantially rectilinearly, a run of the first format strip 32a is guided. Before entering the first forming body 36a, the first format belt 32a is deflected about a guide roller 38a, thereby entraining a first wrapping strip 40a which is withdrawn from a first wrapping strip bobbin 42a. In the first shaping body 36a, the first wrapping strip 40a is then laid around the first strand formed from the first film web 10a by means of the first format strip 32a, so that then a first strand provided with wrapping material exits from the forming device 30. In a corresponding manner, the format device 30 also has a second strand formed from the second film web 10b second format belt 32b driven by a second drive 34b has a second elongated shaping body 36b and adjacent to its inlet a second guide roller 38b on which a second wrapping strip 40b drawn from a second wrapping strip bobbin 42b moves from the second forming belt 32b into the second forming body 36b is taken. Accordingly, at the outlet of the format device 30, a second coated strand formed from the second film web 10b also emerges.

Downstream downstream of the format device 30 is a cutting device 46, which in the exemplary embodiment shown has a rotatably mounted disk-shaped knife carrier 48, on whose circumference diametrically opposite a respective knife 50 is arranged to cut the wrapped strands into discrete bars.

As FIG. 1 can also be seen, so-called. Dancer roller assemblies 52, 54 are provided at various points in the described machine, with which determine the tension in the film web and set or can be regulated.

As FIG. 1 Furthermore, can be seen schematically, further deflection and guide rollers are provided in the course of the transport path of the film web (s), which are not marked in detail.

FIG. 2 shows a double-strand machine in a second embodiment, which differs from the first embodiment according to FIG. 1 differs in that the crimping device 20 has two separate pairs of rollers 22a, 22b, each containing at least one crimping roller and of which the first pair of rollers 22a for crimping the first separated film web 10a and the second pair of rollers 22b is provided for crimping the second separated film web 10b. Accordingly, in this embodiment, the two film webs 10a, 10b, although simultaneously, but spatially separated from each other crimped, unlike the double-wide pair of rollers 22 of FIG. 1 the roller pairs 22a, 22b in the embodiment of FIG. 2 only need to have a simple width. Unlike the first embodiment according to FIG. 1 can also be the two pairs of rollers 22a, 22b are each assigned a separate drive, but preferably the two pairs of rollers 22a, 22b drive synchronously. Alternatively, it is also conceivable in principle to provide a common drive for both roller pairs 22a, 22b.

Incidentally, the construction of the double-strand machine of FIG. 2 the execution of FIG. 1 so that in order to avoid repetition in this respect to the description of FIG. 1 is referenced.

FIG. 3 shows a double-strand machine in a third embodiment, which differs from the first embodiment according to FIG. 1 differs in that already provided by the web delivery device 2, two separate film webs 10a, 10b in side-by-side arrangement available and delivered. For this purpose, bobbins 8a, 8b can be used, each having the two film webs 10a, 10b in the wound state in a juxtaposed, but already separate arrangement and thus have the same or similar clear width as in the first embodiment according to FIG. 1 Thus, according to which this width is at least the sum of a width of the first film web 10 a, which is needed for the production of a first strand, and a width of the second film web 10 b, which is needed for the production of a second strand, or at least a double Value of the width of the individual film web 10a or 10b has.

Alternatively, it is also conceivable to arrange two reels side by side on a bearing mandrel 6, wherein each reel has only one film web 10a or 10b in the wound state and thus its width must correspond only to the width of the wound film web 10a or 10b. However, care should be taken in this alternative embodiment that the two film webs 10a, 10b are deducted from both reels simultaneously in side-by-side arrangement. Also the change of the Bobinen pair should take place at the same time.

Likewise should in the third execution according to FIG. 3 in the case of Bobinenwechsels the connection to the new film web with the leading old Film web in the connecting device 12 substantially simultaneously took place. The same applies to the intermediate storage in the buffer memory 16.

Since the two film webs 10a, 10b transported side by side are also crimped together in the single roller pair 22 of the crimping device 20 and spatially separated only downstream of the crimping device 20, the use of a material web singling device 18 is as in the first embodiment FIG. 1 not required, but is replaced at the appropriate location by a simple Zugwalzenpaar 19.

Incidentally, the construction of the double-strand machine of FIG. 3 the execution of FIG. 1 so that in order to avoid repetition in this respect to the description of FIG. 1 is referenced.

FIG. 4 shows a double-strand machine in a fourth embodiment, with respect to the provision of two film webs 10a, 10b in juxtaposed, but already separate arrangement of the third embodiment of FIG. 3 corresponds, however, in the same way from the third embodiment according to FIG. 3 differs as the second embodiment according to FIG. 2 from the first embodiment according to FIG. 1 Namely, already before crimping and upstream of the crimping device 20, the two film webs 10a, 10b are spatially separated from the web separation device 18, and the crimping device 20 has two separate pairs of rollers 22a, 22b, each containing at least one crimping roller and of which first pair of rollers 22a for crimping the first film web 10a and the second pair of rollers 22b for crimping the second film web 10b is provided. Accordingly, in this embodiment, the two film webs 10a, 10b are also crimped at the same time, but spatially separated from each other, so that even in this embodiment, the pairs of rollers 22a, 22b of the crimping device 20 of this embodiment need only have a simple width. Likewise with the execution of FIG. 2 can be assigned to the two pairs of rollers 22a, 22b of the crimping device 20 of this embodiment each have a separate drive, but preferably the two pairs of rollers 22a, 22b synchronously drive, whereas, however, it is also conceivable in principle, alternatively provide a common drive for both pairs of rollers 22a, 22b. Another difference to the first and second embodiments according to the FIGS. 1 and 2 exists in the fourth embodiment according to FIG. 4 in that the material web singling device 18 has no knife, since the two film webs 10a, 10b are already present in a separate and separated form. Thus, in the fourth embodiment according to FIG. 4 the material web singling device 18 only a Zugwalzenpaar 18a and reduces the task of the web separation device 18 to a spatial separation of the two film webs 10a, 10b from each other, then to supply them to the two spatially separated roller pairs 22a, 22b in the crimping device 20.

Incidentally, the construction of the double-strand machine of FIG. 4 the execution of FIG. 3 so that in order to avoid repetition in this respect to the description of FIG. 3 is referenced.

For the previously based on the FIGS. 1 to 4 described embodiments of a double-strand machine, a control device is used, which is not shown in the figures and the Zugwalzenpaar 18a in the web separation device 18 of FIGS. 1 . 2 and 4 or in FIG. 3 shown roller pair 19 controls such that this pair of draw rollers 18a and 19 sets the desired transport speed. For this purpose, this pair of draw rollers 18a and 19 is actively rotated by a drive not shown in the figures. The control device further controls the crimping device 20 in such a way that the transport speed in the crimping device 20 is synchronized to the transport speed predetermined by the mentioned traction roller pair 18a or 19, wherein preferably the peripheral speed of the roller pair 22 according to FIGS FIGS. 1 and 2 or the two pairs of rollers 22a, 22b according to the Figures 2 and 4 in the crimping device 20 to the peripheral speed of the Zugwalzenpaares 18 a according to the FIGS. 1 . 2 and 4 or 19 according to FIG. 3 is synchronized. Furthermore, the control device is formed, the cutting operation of the strand cutting device 46 to the from To synchronize draw roller pair 18a and 19 predetermined transport speed. Furthermore, the control device is designed to control the drives 34a, 34b for the format belts 32a, 32b in the format device 30 such that the transport speed of at least the run of the format belts 32a, 32b guided along the shaping bodies 36a, 36b is greater than that by a difference value from the tension roller pair 18a and 19 predetermined transport speed. This difference value is determined as a control factor from the deflection of the dancer roller at least in the dancer roller arrangements 54 connected upstream of the format device 30. Since a possible loop during the startup of the machine by the respective Tänzerwalzennordnung 52, 54 determined and compensated by a corresponding control of the drives 34a, 34b of the format device 30, the film webs 10a, 10b can be easily threaded. A looping between the film webs 10a, 10b during normal operation, for example due to different wear of the size bands 32a, 32b of the format device 30, is prevented by the regulation by means of the dancer roller assemblies 54, the value to be controlled below the allowable length tolerance of the rods 44a to be produced, 44b is located.

Due to the width of the film webs 10a, 10b, which emerge from the crimping device 20 substantially flat in a common plane, a web center distance could result which is so great that the use of two separate blade carriers is required in the strand cutting device 46 , In order to prevent this, according to a further preferred embodiment, a distance reducing device 60 is provided between the crimping device 20 and the double stranding device 24, which by way of example in preferred embodiments in FIGS FIGS. 5 to 7 is shown. The in the FIGS. 5 to 7 Illustrated embodiments is common to spend the two film webs 10a, 10b, from a flat in a common plane adjacent arrangement in an orientation in which they, with one of their surfaces opposite each other, one above the other or upright next to each other, so that the distance between the opposing surfaces of the film webs 10a, 10b is significantly less than the distance between the center lines of the Film webs 10a, 10b before entering the distance reducing device 60, such as FIGS. 5 to 7 reveal. Accordingly, in these embodiments, the film webs 10a, 10b spent in a superposed or upright side by side arrangement, the distance can be kept very low if necessary. Thus, this measure further allows the use of only a single blade carrier 48 in the strand cutter 46.

At the in FIG. 5 As shown, the film webs 10a, 10b are rotated about their central axis by about 90 ° by being deflected together about a first guide roller 62, before each individually about a relative to the first guide roller 62 offset by 90 ° arranged second guide roller 64a and 64b guided and thereby spent in the mentioned edgewise arrangement next to each other. In the in FIG. 5 illustrated embodiment is followed immediately downstream of the second guide rollers 64a, 64b, the double stranding device 24, which in the illustrated embodiment for each film web 10a, 10b has a forming shoulder 26a, 26b and a downstream finger 28a, 28b. In the forming shoulders 26a, 26b, the film webs 10a, 10b are brought out of their hitherto flat spread state in a strand-like preformed state and solidified in the fingers 28a, 28b into a strand. Between the forming shoulders 26a, 26b and the fingers 28a, 28b components not shown in the figures, such as a star or a disk, can be provided, which further compress or crumple the film webs 10a, 10b. In the in FIG. 5 In the embodiment shown, the arrangement of the first forming shoulder 26a and the first finger 28a aligned therewith and the arrangement of the second forming shoulder 26b and the second finger 28b aligned therewith are oriented parallel to one another. This also applies to the transport paths 43a, 43b, which follow the fingers 28a, 28b of the double strand formation device 24 and lead to the format device 30 FIG. 5 also shows.

FIG. 6 FIG. 11 shows another embodiment of a pitch reducer 60 that differs from the embodiment of FIG FIG. 5 characterized in that the arrangements of first forming shoulder 26a and first finger 28a and second forming shoulder 26b and second finger 28b in the double stranding 24th are skewed to each other, so that the strands formed therein V-shaped to run towards each other. This also applies initially to the transport paths 43a, 43b which adjoin the fingers 28a, 28b, but which, in relation to the transport direction A downstream, receive a parallel orientation downstream of a pair of deflection rollers 68a, 68b, between which the fingers 28a, 28b delivered strands in the transport paths 43a, 43b out and where they experience a corresponding deflection.

In the FIGS. 7a to c A further embodiment of a distance reducing device 60 is shown, which differs from the embodiments according to FIGS Figures 5 and 6 differs in that in addition to a first common guide roller 62 and a pair of each film web 10a, 10b separately associated second guide rollers yet another pair of each film web 10a, 10b separately associated third guide rollers is provided. While Figure 7a For a complete view of this design, see the FIGS. 7b and 7c for reasons of clarity in a partial view, only the arrangement of the guide rollers for the first film web 10a. The film webs 10a, 10b, which lie flat next to one another in a common first plane, are first deflected about the first common deflection roller 62, namely by an angle smaller than 90 °, and then respectively to a second deflection roller 66a or 66b arranged downstream of the first deflection roller 62 , The guide rollers 66a, 66b of the second guide roller pair lie in one of the two film webs 10a, 10b still jointly spanned second plane, but are at an angle to each other and at an angle which is smaller than 90 ° to the longitudinal or running direction of the respective film web 10a , 10b oriented. As a result of this arrangement of the second pair of deflecting rollers 66a, 66b provided separately for each film web 10a, 10b, the two film webs 10a, 10b are deflected into two different third planes, which are at an angle to one another. Downstream of the second guide rollers 66a, 66b are also provided in pairs third guide rollers 67a, 67b, of which the guide roller 67a together with the guide roller 66a, the third level for the first film web 10a and the guide roller 67b together with the guide roller 66b, the third level forms for the second film web 10b, which is inclined relative to the third plane for the first film web 10a. Here are the third Deflection rollers 67a, 67b further arranged so that they deflect the two film webs 10a, 10b in a then parallel orientation to each other, in which the film webs 10a, 10b with their surfaces at a relatively small distance from each other.

FIG. 8 shows a portion of a double-strand machine in the area between the double stranding device 24, the downstream format device 30 and the downstream strand cutter 46. In addition, downstream of the strand cutter 46, a push-in drum 70 is shown schematically. In this in FIG. 8 illustrated embodiment lacks a separate distance reducing means, although, as FIG. 8 can be seen, a distance reduction between the strands takes place. In the present case, this is achieved by the shaping bodies being inclined relative to one another in the format device 30 in such a way that the runs of the format strips 32a, 32b extending therein run towards one another in the transport direction according to arrow A.

As FIG. 8 Further, the transport paths formed by the molding bodies 26a, 26b are aligned with the upstream side transport paths 43a, 43b coming from the double strand former 24 as well as the downstream side transport paths 44a, 44b. At this time, the downstream-side transport paths 44a, 44b maintain their alignment and therefore also converge toward each other, not only through the strand cutter 46, but also to the insertion drum 70 where the rods cut by the strand cutter 46 are pushed. Although the transport paths 44a, 44b are thus not guided in parallel through the strand cutter 46, it is still possible to cut the strands at right angles when the knives 50 on the rotary knife carrier 48 describe a circular path whose course, orientation and diameter are adjusted accordingly , As FIG. 8 can also be seen, the fingers 28a, 28b, also shown, the upstream Doppelstrangbildungseinrichtung 24 are aligned parallel to each other. Alternatively, it is also conceivable, if necessary, already the fingers 28a, 28b tilt accordingly and thus to bring into alignment with the subsequent transport paths 43a, 43b.

FIG. 9 shows a further embodiment, different from the execution of FIG. 8 differs in that the downstream of the format means 30 transport paths 44a, 44b are brought before reaching the strand cutter 46 in a parallel alignment with each other.

FIG. 10 is different from the ones previously based on the FIGS. 8 and 9 described embodiments in that the distance reduction is reduced exclusively by the guided between the double stranding device 24 and the format device 30 transport paths 43a, 43b, namely, coming from the double strand former 24, initially facing each other and are then brought into a parallel alignment , Accordingly, in this embodiment, the two transport paths 43a, 43b have a curved course. Finally lets FIG. 10 an aligned arrangement of the fingers 28a, 28b of the double stranding device 24 with respect to the adjacent portion of the transport paths 43a, 43b recognize.

Claims (18)

Multi-strand machine of the tobacco-processing industry, in particular double-strand machine, for the simultaneous production of several strands, in particular filter strands or tobacco strands, with
a material web providing device (2) which is designed to provide, in particular paper, plastic film, sheet metal and / or tobacco foil, web-like material (10; 10a, 10b), and
a downstream downstream multiple strand former (24) configured to form a plurality of strings from the sheet material (10; 10a, 10b);
and a crimping device (20) arranged between the material web supply device (2) and the multiple strand former (24) and designed to receive the web-shaped material (10a, 10b) provided by the web supply device (2) for all strands to be formed by the multi-strand former (24) to crimp together. Machine according to claim 1,
wherein the crimping means (20) comprises a single crimping roller or crimping roller pair (22), the single crimping roller or crimping roller pair (22) being formed by the web-shaped material (10a, 10b) provided by the web supplying means (2) for all crimping strands to be formed by the multiple strand former (24), or
the crimping device (20) has a plurality of synchronously driven crimping rollers or pairs of crimping rollers (22a, 22b) which are designed to provide the web-shaped material (10a, 10b) provided by the material web supply device (2) for all strands to be formed by the multiple stranding device (24) to crimp together, or
the crimping device (20) corresponding to the number of strands to be formed by the multiple strand former (24) comprises a plurality of synchronously driven crimping rolls or crimping roll pairs (22a, 22b), of which in each case a crimping roller or a pair of crimping rollers (22a, 22b) comprises a sheet-like section (10a, 10b) of the sheet-like material (10) provided by the material web supply device (2) for one of the multiple stranding device (24). assigned to forming strand and is designed to crimp this web-shaped portion (10 a, 10 b). Machine according to claim 1 or 2,
wherein the web supply means (2) is adapted to provide sheet material (10) having a plurality of adjacent web-shaped portions corresponding to the number of strands to be formed by the multi-strand former (24), each web-shaped portion being composed of a plurality to form a strand of strands to be formed by the multiple strand former (24) and the width of the sheet material (10) is substantially equal to the sum of the widths of the web shaped sections. Machine according to one of the preceding claims,
with a material web separating device (18) which is designed to separate the web material (10) provided by the material web supply device (2) into adjacent web - shaped sections which form separate material webs (10a, 10b), and between the material web supply device (2) and Multiple stranding device (24) is arranged,
in which preferably the web separation device (18) is arranged upstream of the crimping device (20), wherein preferably the web separation device (18) is arranged closer to the crimping device (20) than to the web delivery device (2) or
the web-separating device (18) is arranged downstream of the crimping device (20), wherein preferably the web-separating device (18) is either closer to the crimping device (20) than to the multiple stranding device (24) or closer to the Multiple strand forming device (24) is arranged as on the crimping device (20). Machine according to claim 1 or 2,
in which the material web supply device (2) is designed to provide the web-like material in a number of separate material webs (10a, 10b) corresponding to the number of strands to be formed by the multiple strand former (24), wherein the material web providing device (2) preferably comprises means (6). for receiving at least one reel (8a, 8b) containing web-like material which is subdivided into a plurality of adjacent webs of material (10a, 10b) corresponding to the number of strands to be formed by the multiple stranding device (24) and means for unwinding the reel (8a, 8b). Machine according to at least one of the preceding claims, with a connecting device (12) which is arranged between the material web supply device (2) and the crimping device (20). Machine according to at least one of the preceding claims, comprising a distance reducing device (60) which is formed from at least two separate material webs (10a, 10b) which have been formed from the web-shaped material (10) provided by the material web supply device (2) substantially flat juxtaposed arrangement in an orientation in which they are substantially opposite each other with one of their surfaces and whose distance from each other is less than the distance between the center lines of the material webs (10a, 10b) from each other before entering the distance reducing means (60) , where preferred
the distance reduction device (60) is designed such that prior to entry into the distance reduction device (60), the material webs (10a, 10b) lie side by side substantially in a common plane and / or being preferred
the distance reduction device (60) is designed to deflect the at least two separate material webs (10a, 10b) in such a way that they are brought into outlet planes which are preferably parallel to one another and whose spacing from one another is less than the distance between the center lines of the material webs (10a , 10b) from each other before entering the distance reducing means (60). Machine according to claim 7,
in which the distance reduction device (60) is designed to rotate the material webs (10a, 10b) by 90 ° about their central axis, and preferred
for each material web (10a, 10b) has a first rod-shaped deflection means (62) and a relation to the first rod-shaped deflection means (62) offset by 90 ° arranged second rod-shaped deflection means (64a, 64b). Machine according to claim 7,
wherein the distance reducing means (60) for each material web (10a, 10b) comprises a first rod-shaped deflection means (62) for deflecting the material web (10a, 10b) by less than 90 °, a second rod-shaped deflection means arranged downstream of the first rod-shaped deflection means (62) (66a, 66b), which is in the plane which is spanned by the material web (10a, 10b) after leaving the first rod-shaped deflection means (62), while at an angle to the first rod-shaped deflection means (62) is oriented, and a third bar-shaped deflecting means (67a, 67b) provided downstream of the second bar-shaped deflecting means (66a, 66b) which lies in the plane defined by the material web (10a, 10b) after leaving the second bar-shaped deflecting means (66a, 66b) and at an angle , preferably of 90 °, relative to the second rod-shaped deflection means (66a, 66b) is oriented, wherein preferred
the second rod-shaped deflection means (66a, 66b) and the third rod-shaped deflection means (67a, 67b) are fastened to one another by one of their two ends. Machine according to at least one of the preceding claims, wherein the multiple strand forming means (24) according to the number of strands to be formed comprises a number of forming shoulders (26a, 26b) adapted to respectively supply the sheet material (10a, 10b) to a tube form, with preference
the shaping shoulders (26a, 26b) are arranged inclined relative to one another in such a way that their spacing in the direction of movement of the web-shaped material (10a, 10b) decreases, with preference being given to this
the multiple strand former (24) has a number of slices and stars corresponding to the number of strands to be formed to form strands of the sheet material (10a, 10b). A machine according to at least one of the preceding claims, characterized by a format device (30) arranged downstream of the multiple strand former (24) and configured to form the strands formed by the multiple strand former (24) with wrapping material (40a, 40b), preferably paper. to provide, with preferred
the format means (30) having a plurality of transport paths (36a, 36b) directed towards each other in the direction of movement (A), such that the distance of the transport paths (36a, 36b) from each other is equal to the number of strands formed by the multiple strand former (24) at its downstream end is smaller than at its upstream beginning and / or wherein preferably according to the number of strands to be formed by the multiple strand former (24) a plurality of transport paths (43a, 43b) are provided by the multiple strand former (24) to the format device (30), wherein at least two of these transport paths (43a, 43b) with their upstream portion adjacent to the Mehrfachstrangbildungseinrichtung (24) in the transport direction (A) facing each other and oriented with its downstream portion adjacent to the format means (30) parallel to each other are, so in that the spacing of these transport paths (43a, 43b) from one another is lower at their downstream end in front of the format device (30) than at their upstream beginning adjacent to the multiple strand former (24). Machine according to claim 11,
with a strand cutting device (46) arranged downstream of the format device (30) and designed to cut the strands into bars of discrete length. Machine according to claims 11 and 12,
in which, according to the number of strands formed by the multiple strand former (24), a plurality of transport paths (44a, 44b) are provided which follow the transport paths of the format means (30) and pass through the strand cutter (46), preferably either
at least one transport path (44a, 44b) substantially over its entire length by the strand cutting device (46) through with the associated upstream transport path of the format device (30) is aligned or
at least two transport paths (44a, 44b) on their way from the format device (30) to the strand cutting device (46) in a parallel alignment with each other. Machine according to at least one of the preceding claims, comprising an actively driven draw roller (18a, 19) arranged between the material web supply device (2) and the crimping device (20) and a control device which controls the draw roller (18a, 19) in such a way that the draw roller (18a, 19) determines the desired transport speed, and the crimping device (20) controls such that the transport speed in the crimping device (20) is synchronized with the transport speed predetermined by the traction roller (18a, 19). Machine according to claims 2 and 14,
wherein the control means is arranged to synchronize the peripheral speed of the crimping roller (s) (22; 22a, 22b) with the peripheral speed of the tensioning roller (18a; 19). Machine according to claim 14 or 15,
in which the format device (30) has a common drive assigned to all transport paths, which is designed for the simultaneous transport of the strands in all transport paths, and the control device is further configured to limit the cutting operation of the strand cutter (46) to that of the draw roller (18a; 19) synchronize predetermined transport speed. Machine according to claim 11 and according to at least one of claims 14 to 16,
in which the format device (30) has a drive device (34a, 34b), which is provided for the transport of the strands along the transport paths (43a, 43b), and the control device is designed, the drive device (34a, 34b) of the format device (30 ) so that the transport speed along the transport paths within the format device (30) by a difference value is greater than the predetermined by the tension roller (18a; 19) transport speed, preferably
between the crimping device (20) and the format device (30) a web tension control device (54) is arranged, which specifies the difference value, wherein preferred
the web tension control device (54) has a dancer roller and the control device is designed to determine the difference value from the deflection of the dancer roller. Machine according to claim 17,
in which the format device (30) has a plurality of endlessly circulating format strips (32a, 32b) corresponding to the number of strands to be formed by the multiple strand formation device (24) adapted to receive and take along a strip (40a; 40b) of wrapping material and to move with a run along an associated transport path (36a; 36b) where they are then formed, the wrapping material strip (40a; 40b) around the strand to set, the drive means (34a, 34b) provided for circulating movement of the format strips (32a, 32b) and the control means is adapted to set the speed of the format strips (32a, 32b) in the region of the transport paths to a value which is greater by the difference value as the predetermined by the tension roller (18a; 19) transport speed.

Images