EP2420148A1 - Cutting device of a string machine for the tobacco processing industry - Google Patents

Abstract

The device (32) has cutting knives (33) arranged on an outer side of a knife carrier and linearly displaced in radial direction during rotation of the knife carrier. A switching shaft (42) and switching devices (44) are actuated by actuators i.e. drives (40), and stand in effective connection with roller feeding devices (54) for the cutting knives so that the switching devices and the switching shaft are actuated by actuation of the actuators. The cutting knives are moved in the radial direction in a constraint synchronous manner by actuation of the roller feeding devices. An independent claim is also included for a method for operating a strand machine of a tobacco processing industry.

Description

The invention relates to a cutting device of a rod making machine of the tobacco processing industry for cutting an endless, funded strand of the tobacco processing industry, in particular tobacco rod or filter strand, in rods of finite length, wherein the cutting device comprises a rotating or rotatable knife carrier, wherein on the outside of the knife carrier at least two, preferably arranged diametrically opposite, cutting blades are arranged, wherein the cutting blades are each using a respective feed device for the respective cutting blade, preferably during rotation of the blade carrier and / or in particular in the radial direction linear, displaced or displaced.

Moreover, the invention relates to a method for operating a strand machine of the tobacco-processing industry and a

Strand machine of the tobacco processing industry.

In cutting devices of extrusion machines of the tobacco-processing industry endless cigarette strands or filter strands are cut into single cigarettes or filter rods, wherein by means of a strand guide the endless strand to be cut is guided in the region of the cutting device. Since the conveyed endless strand continues to move during the cut, in order to make the cut exactly perpendicular to the strand direction, the cutting point is moved during the cut with the strand to be cut. Therefore, designed as a tubular stem strand guide is movably supported in the direction of strand.

Out DE-A-2 233 064 is a cutting device of a rod making machine of the tobacco processing industry for separating an endless strand into rod-shaped individual articles known. By means of the cutting device, endless article strands, for example cigarette strands or filter strands, are cut into rod-shaped or strand-shaped articles, for example single cigarettes or filter rods. A strand guide guides the cigarette rod in the area of the cutting device. The strand guide may be formed, for example, as a tube having a recess through which a knife of the cutting device for cutting the article strand passes. The strand guide is movably mounted in the conveying direction or transport direction of the article strand to be cut.

Furthermore, the cutting device of a stranding machine comprises a knife held on a knife holder and rotating with this knife holder knife, which is arranged on a knife carrier. In particular, the knife carrier is gimbal-mounted on a cutting wheel designed as a rotary body or the like, so that the knife during the cutting process in which it having two tubes forming the strand guide, in particular longitudinally aligned, tubes is passed, a movement component in the conveying direction or transport direction of the article strand to be cut has. In this case, the movement component in the conveying direction or transport direction of the knife corresponds in its speed to the conveying speed of the strand to be cut.

In addition, in EP-A-1 640 125 discloses a further apparatus for cutting a continuously guided strand of the tobacco processing industry into strand-shaped or rod-shaped articles of variable length.

Based on this prior art, the object of the invention is to improve the operation of an extrusion machine of the tobacco processing industry or the handling of a cutting device, the design effort should be kept as low as possible.

This object is achieved by a cutting device of a rod making machine of the tobacco-processing industry for cutting an endless, conveyed strand of the tobacco processing industry, in particular tobacco rod or filter strand, in rods of finite length or rod-shaped individual articles, wherein the cutting device has a rotating or rotatable knife carrier, wherein are arranged on the outside of the knife carrier at least two, preferably diametrically opposed, cutting blades, the cutting blades, which are each held by a holding device, each using a respective feed device for each cutting blade, preferably during rotation of the blade carrier and / or in particular in the radial direction linear, displaceable are or are moved, which is further developed in that an actuator and actuated by the actuator or operated Zwangsssynchronisierungseinrichtung are provided, wherein the one Zwangsssynchronisierungseinrichtung parallel or simultaneously with the respective feed devices for the cutting blades in respective, permanent operative connection is, so in particular by Actuation of the actuator and standing in operative connection with the feed devices forced synchronization is or is operated and the cutting blades are simultaneously or synchronously or forcibly in the radial direction movable or moved by the respective simultaneous operation of the feed devices or moved.

The invention is based on the idea that only an actuating device and a forced synchronization device for the two provided feed devices of the respective cutting blade are operated or switched simultaneously, whereby due to the positively synchronized actuation of the feed devices always the two cutting blades are moved by the same feed length.

The uniform feed movements of the two diametrically opposed cutting blade are achieved in that with the interposition and use of only one forced synchronization, which is simultaneously connected to the feed devices for the two cutting knives in operative connection by actuation of the actuator via the forced synchronization means a corresponding feed to a certain Feed length is performed. In particular, with the use of interposed locking devices or latching devices and freewheel devices, for example on a drive shaft, which is provided with corresponding feed devices is operatively connected, actuated by actuation of the actuator by a predetermined angle, so that the execution of the rotation via engaging the drive shaft spur gears, the movement of the drive shaft is converted into a feed movement for the respective cutting blade.

By the synchronous feed movement of the feed devices or the cutting blade an intermittent drive or an intermittent and zwangsssynchron drive device is provided for the cutting blade, wherein by performing a lifting movement of the forced synchronization a defined linear feed movement of the cutting blade is achieved with a predetermined feed length.

For example, a forced synchronization device has a switching shaft, wherein the switching shaft has an eccentric or eccentric, which or executes a defined rotational movement about a predetermined angle on a drive shaft for both cutting blades upon rotation of the switching shaft using a corresponding transmission mechanism.

The forced synchronization device is in the context of the invention, a drive device for the simultaneous operation of the feed devices or for the cutting blade to be moved.

In particular, the actuations and movements of the individual feed devices and the holding devices or the feed movements of the cutting blade are using only one actuator and only one in operative connection with the single actuator forced synchronization synchronously executed by the same feed path.

Moreover, it is provided in an embodiment that when the forced synchronization device is actuated, in each case an intermittent feed movement of the individual cutting blades with a predetermined feed length at the same time, i. synchronous, executable or executed.

Moreover, in a preferred embodiment of the cutting device is provided that for each feed device of a cutting blade in each case one is provided with the Zwangsssynchronisierungseinrichtung operatively connected drive shaft, in particular the output side, the respective drive shafts are in engagement with a spur gear of the respective feed device. In this case, in particular, the axes of rotation of the drive shafts are formed co-linear or parallel to one another, wherein both drive shafts are actuated correspondingly using the forced synchronization device. In particular, in a concentric alignment of the axes of rotation of the drive shafts a compact design of the cutting device is possible.

For this purpose, it is further provided that the drive shafts have the same direction of rotation upon actuation of the forced synchronization device, wherein in a further embodiment, the drive shafts are arranged symmetrically to each other or mirror-symmetrical to each other.

Furthermore, in an alternative embodiment of the cutting device, it is preferred that only one drive shaft is in operative connection with the forced synchronization device, wherein in particular one drive shaft has two output sides and on the output side, the output sides of the drive shaft are in operative connection with a respective spur gear stage of the respective feed device. As a result, a simple construction of the cutting device or the intermittent drive for the feed movements of the cutting blade is achieved.

In addition, it is provided in one embodiment of the invention that an electric and / or pneumatic drive is provided for or as an actuator. In an alternative embodiment is also conceivable that a mechanical drive, for example in the form of an add-on or the like, is possible.

For this purpose, it is provided in one embodiment that the drive for the actuator is formed in a strand-parallel shaft of the cutting device or in a strand-parallel shaft of an abutment of the cutting device. Due to the gimbal suspension of the knife carrier by means of a gimbal mounted device for trained with two cutting blades knife carrier and knife holder and at a predetermined inclination to the strand to be cut aligned center axis of the cutting device is provided as an abutment for the cutting this with a strand parallel shaft, wherein in a Embodiment of the electric or pneumatic drive is designed for the actuator in the strand-parallel shaft of the thrust bearing of the cutting device. This results in a space-saving construction of the entire cutting device. In an alternative embodiment, it is provided that the electric or pneumatic drive for the actuator is arranged outside the strand-parallel shaft of an abutment of the cutting device.

Moreover, in an alternative embodiment it is provided that both feed devices for the cutting knives are operatively connected using a shaft to an external drive provided outside the cutting device, so that both feed devices, together with the respective cutting knives, continuously in the radial direction due to the operation of the external drive, preferably synchronously or positively synchronously, are or are movable. By providing a shaft which is simultaneously directly operatively connected to the two feed devices for the cutting knives, a forced synchronization device is formed, so that by rotating the shaft both feed devices simultaneously, i. be moved synchronously.

In the invention, by providing the shaft which is operatively connected to the feed devices of the cutting knives, it is possible for the cutting knives to be moved radially outwards by the actuation of the feed devices and during the rotation of the cutting device designed as a cutting wheel. As a result, a continuous, constant and uniform and (forced) synchronous feed of the cutting blade is achieved with a predetermined, preferably constant, feed rate during continuous operation of the shaft.

For this purpose, it is further provided that, using one, preferably only one, shaft as a forced synchronization device, which is in operative connection with the respective feed devices for the cutting blades, the shaft in operative connection with the feed devices is actuated or operated by actuation of the drive, so that the feed devices synchronously and simultaneously by the simultaneous actuation of the feed devices, the respective cutting blades or are continuously movable or moved synchronously in the radial direction. In particular, the shaft is rotated by the drive or rotationally driven.

Preferably, the wave passing between the external, i. located outside the cutting wheel, drive and within the e.g. arranged as a cutting wheel cutting device provided bevel gear is arranged as a flexible shaft. In this case, the flexible shaft is in operative engagement with an internal bevel gear stage, which is in direct operative connection via spur gears or the like with the two feed devices for the cutting blade.

In addition, in one embodiment of the cutting device, it is preferred that an electric drive is provided as the drive of the shaft, wherein, in particular, the electric drive is arranged or formed in a strand-parallel shaft of an abutment of the cutting device.

Furthermore, the object is achieved by a method for operating a rod machine of the tobacco-processing industry, in particular filter rod machine or tobacco rod machine, wherein a continuously conveyed strand, preferably tobacco rod or filter rod, is cut into rod-shaped or strand-shaped articles using a cutting device described above. In the context of the invention, it is also possible that two or more strands are cut simultaneously into rod-shaped articles.

Furthermore, the object is achieved by a rod making machine of the tobacco-processing industry, in particular a filter rod machine or tobacco rod machine, having an above-described Cutting device is designed for cutting a subsidized strand or several conveyed strands of the tobacco processing industry. In particular, the stranding machine can be designed as a so-called double-strand machine or multiple-strand machine, so that two or more strands are produced and processed or cut. To avoid repetition, reference is expressly made to the above statements.

Further features of the invention will become apparent from the description of embodiments according to the invention together with the claims and the accompanying drawings. Embodiments of the invention may satisfy individual features or a combination of several features.

Fig. 1

schematisch eine perspektivische Ansicht einer Strangmaschine der Tabak verarbeitenden Industrie mit einer Einrichtung zum Schneiden eines kontinuierlich geförderten Strangs in strangförmige Artikel,

Fig. 2

eine schematische Funktionsdarstellung der mit dem Strang in Eingriff befindlichen Schneideinrichtung,

Fig. 3

schematisch eine Prinzipdarstellung eines Schneidrades mit einer Zwangssynchronisierungseinrichtung und

Fig. 4

schematisch eine Prinzipdarstellung eines Schneidrades mit einer weiteren Zwangssynchronisierungseinrichtung.

The invention will be described below without limiting the general inventive idea by means of embodiments with reference to the drawings, reference being expressly made to the drawings with respect to all in the text unspecified details of the invention. Show it:

Fig. 1

1 is a schematic perspective view of a tobacco processing industry stranding machine with a device for cutting a continuously conveyed strand into rope-shaped articles;

Fig. 2

a schematic functional representation of the cutter engaged with the strand,

Fig. 3

schematically a schematic diagram of a cutting wheel with a forced synchronization and

Fig. 4

schematically a schematic diagram of a cutting wheel with another forced synchronization device.

In the following figures, identical or similar elements or corresponding parts are provided with the same reference numerals, so that a corresponding renewed idea is dispensed with.

In the schematic representation according to FIG. 1 there is shown a device known as a cigarette rod making machine 10 which is used for the production of rod-shaped articles such as cigarettes or the like. A cigarette rod machine is known, for example, under the name "PROTOS" of HAUNI Maschinenbau AG.

In FIG. 1 By way of example, a cigarette rod making machine 10 is shown, which essentially comprises, in addition to a storage container 11 for the material to be processed or a conveyor 12 for transporting the material from the storage container 11 to a storage shaft 13, strand forming means 14 for forming a strand or more parallel strands Strangförderer 15 and a device 16 for cutting the continuously conveyed strand or more continuously funded strands comprises.

The cigarette rod maker 10 may be formed as a single, double or multiple strand machine. In principle, extrusion machines for other products, such as filters, constructed in a similar manner. In particular, each stranding machine for producing cigarettes as well as for producing filters of endless tow fibers or finite filter material in the strand process comprises means 16 for cutting the continuously conveyed strand or the continuously conveyed strand Strands. A filter rod machine is, for example, in DE-A-41 09 603 described by way of example.

The device 16 is used to cut articles of an endless strand or more parallel strands of tobacco, filter material or the like with a length adjustment of the device for cutting articles of variable length.

The principle of an embodiment of this device 16 for cutting or cutting, for example, a single continuously conveyed strand 17 in rod or rod-shaped article, which is also operable as a single, separate unit will be described in detail with reference to the schematic FIG. 2 explained in more detail and by way of example.

The cutting wheel 32 designed as a cutting device and rotatably drivable has two cutting blades 33 and is with respect to the strand 17, as in Fig. 2 represented inclined, arranged. In this case, the pivot axis of the cutting wheel 32 is perpendicular to the transport direction of the strand 17 when the cutting blade or blades 33 have strand speed. Preferably, the two cutting blades 33 are distributed on the circumference of the rotating body designed as a cutting wheel 32 and arranged diametrically opposite each other. The cutting blades 33 are movable on the cutting wheel 32, preferably designed to be rotatable or pivotable about an axis extending radially relative to the cutting wheel 32. To change the inclination angle β between cutting wheel 32 and strand 17, the cutting wheel 32 is adjustable, in particular pivotable, formed.

From the illustration in FIG. 2 It can be seen that the strand 17 is conveyed continuously in the transport direction T. The axis of rotation R _{s of} the cutting wheel 32 extends at an angle to the strand 17. As a result, the center axis M _{S of} the cutting wheel 32 also extends obliquely or inclined at an angle, the so-called helix angle or inclination angle β to the strand 17. The angle β is preferably between 60 ° and <90 °. The cutting blades 33 are arranged on the cutting wheel 32 such that their trajectories at the intersection S with the strand 17 are perpendicular to the strand 17.

Due to the inclination under the (inclination) angle β and the rotation of the cutting wheel 32 exists a horizontal, preferably axial velocity component of the cutting knife 33 engaged in the transport direction T of the strand 17. The transport speed T of the strand 17 and the axial velocity component of the cutting blade 33rd at the intersection S are almost identical. The inclination angle β is variable. In order to produce shorter or longer rod-shaped articles 34, the speed of the cutting wheel 32 is adjusted or changed with unchanged or constant strand speed to meet the condition "equality of the strand speed and the axial velocity component of the blade". However, in order to satisfy the condition of "equality of the strand speed and the axial velocity component of the knife", it is preferable to adjust the inclination angle β, resulting in shorter or longer rod-shaped articles 34.

For further details of the cutting wheel or to the device 16 is on the disclosure of the patent application EP-A-1 640 125 referenced in the full disclosure of the present

Patent application is expressly incorporated.

For the cutting wheel 32 for supporting a carrying device (not shown here) is provided, wherein based on the transport direction T of the strand 17 on the opposite side of the cutting wheel 32, a drive 36 is arranged to drive the cutting wheel 32 rotationally.

Further, on the side facing away from the drive 36 of the cutting wheel 32 on the (not shown here) carrying means an abutment for the cutting wheel 32 is provided, wherein the abutment has a stationary and rigid support means and is connected via a hinge connection with the cutting wheel 32. The articulated connection has in particular a strand-parallel shaft 38, which is arranged or formed parallel to the conveyed strand 17.

In the Figures 3 and 4 Embodiments of a cutting wheel 32, each with a forced synchronization device in a schematic representation in cross-section are shown schematically in each case.

According to the embodiment in Fig. 3 outside the housing of the cutting wheel 32, an external drive 40, preferably in the strand-parallel shaft, is arranged, which is operatively connected via a switching shaft 42 and using a switching device 44 with a drive shaft 46. The drive shaft 46 in the interior of the cutting wheel 32 is the output side via schematically illustrated spur gears 48 operatively connected to a worm gear 52, wherein the respective worm gear 52 is in operative connection with a roller feed 54 for the respective cutting blade 33.

In one embodiment, the shift shaft 42 is mounted in the fork of an abutment for the cutting wheel 32 and is rotated in the normal operation of the cutting wheel 32 at the same speed as the cutting wheel 32. Further, the shift shaft 42 has, for example, an eccentric which engages in a slot of a switching device 44 designed as a switching socket.

Further, the switching device 44 and the switch socket on corresponding locking devices or pawls and freewheels for the drive shaft 46, wherein at a different speed of the switching shaft 42 and formed as a fork receiving means for the Schneidmessertrageinrichtung inside the cutting wheel 32 of the cam shaft of the shift shaft 42 against a Long hole in the switch sleeve presses and thereby the operatively connected drive shaft 46 is rotated by a predetermined angle.

With the use of pawls or pawls on the drive shaft 46, the drive shaft 46 is actuated or rotated by actuation of the shift shaft 44, whereby the roller feeds 54 for the cutting blade 33 are actuated by the operation of the drive shaft 46 forcibly synchronized and thus the cutting blade 33, the diametrically are arranged opposite each other on a blade carrier, not shown here, of the cutting wheel 32, are moved simultaneously and synchronously by a predetermined feed length radially outward.

In the context of the invention, it is possible that instead of a drive shaft 46 simultaneously two separate drive shafts on the shift shaft 42 and synchronously coupled, so that upon actuation of the shift shaft 42, the two coupled directly to the shift shaft 42 and forcibly actuated drive shafts also the cutting blade 33rd simultaneously and synchronously move outward in the radial direction.

In one embodiment, the drive 40 for the switching shaft 42 in the strand-parallel shaft (reference numeral 38, Fig. 2 ), so that the switching device 44 and the drive gear for the roller feeders 54 and the knife feed devices are driven intermittently.

Furthermore, it is possible within the scope of the invention that the energy for the drive 40 is transmitted in an inductive manner to the strand-parallel shaft, wherein control signals, for example, inductive or transmitted as frequency in the drive energy or as different voltages.

The fact that a synchronous simultaneous operation for the two cutting blades 33 of the cutting wheel 32 is provided with the same feed length ensures that the two cutting blades 33 always perform the same intermittent feed.

Moreover, it is possible in the context of the invention that the drive 40 is designed as a pneumatic or mechanical drive or as an addition gear. In this case, the drives can be externally outside the strand-parallel shaft, i. be designed as internal drives.

At the in Fig. 3 In the embodiment shown, a forced synchronization device is provided for the two feed devices for the cutting blades 33, so that the feed devices are actuated simultaneously and positively synchronously, as a result of which the cutting blades 33 are correspondingly forcibly moved outward in the radial direction. Here, an intermittent feed movement of the cutting blade 33 is performed with a predetermined feed length.

At the in Fig. 3 illustrated embodiment, the shift shaft 42 is further preferably formed as a rigid shaft, which is the drive side connected to the external drive 40.

In Fig. 4 another embodiment of a forced synchronization device for the feed devices of the cutting blade 33 is shown schematically. Here, outside the cutting wheel 32, an external drive 60 via a flexible shaft 62 with a bevel gear 64 in the interior of the cutting wheel 32 is operatively connected. In a (not shown) embodiment of the drive is formed in a strand parallel shaft.

The bevel gear 64 is further operatively connected on both sides, each with a spur gear 68 with the existing of a worm gear 52 and the roller feed 54 feed devices for the respective cutting blade 33.

The flexible, flexible drive shaft 62 can be designed, for example, as a spring, whereby it is possible that the spring or the flexible shaft 62 allows a length compensation during the rotation of the cutting wheel 32 and also can transmit a drive torque to the bevel gear 64.

Characterized in that the bevel gear 64 is disposed in a universal joint of the cutting wheel 32, the bevel gears of the bevel gear 64 are driven accordingly due to the operative connection, and at the same time and forcibly the worm gear 52 and Rollenvorschübe 54 driven for the cutting blade 33, so that the cutting blade 33 at the same time and synchronously by operation or by the drive 60 of the flexible shaft 62 a linear, outward in the radial direction.

By a speed difference between the drive 60 and the drive 36 for the cutting wheel 32, it is possible that the cutting blades 33 are moved linearly or radially continuously, so that by the continuously driven flexible shaft 62 at a (positive) speed difference, the cutting blade 33 continuously be moved to the outside. As a result, a continuous, preferably addition-gear-free, feed of the cutting blade 33 is formed.

All mentioned features, including the drawings alone to be taken as well as individual features that are disclosed in combination with other features are considered alone and in combination as essential to the invention. Embodiments of the invention may be accomplished by individual features or a combination of several features.

LIST OF REFERENCE NUMBERS

10

Cigarette-making machine

11

storage container

12

promoter

13

accumulating shaft

14

Strand-forming agent

15

line conveyor

16

Facility

17

strand

32

cutting wheel

33

cutting blade

34

items

36

drive

38

strand-parallel wave

40

drive

42

shift shaft

44

switching device

46

drive shaft

48

spur gear

52

worm gear

54

roller feed

60

drive

62

flexible shaft

64

bevel gear

68

spur gear

β

tilt angle

S

intersection

T

transport direction

M _s

Central axis plane

R _s

axis of rotation

Claims (14)

Cutting device (32) of a tobacco processing machine (10) for cutting an endless, conveyed strand (17) of the tobacco processing industry, in particular tobacco rod or filter rod, into rods (34) of finite length, wherein the cutting device (32) comprises a rotating or rotatable knife carrier, wherein on the outside of the knife carrier at least two, preferably diametrically opposed, cutting blades (33) are arranged, wherein the cutting blades (33) each using a respective feed device (54) for the respective cutting blade (33), preferably during the rotation of the blade carrier and / or in particular in the radial direction linear, are displaced or displaced, characterized in that an actuator (40, 60) and one of the actuator (40, 60) actuated or operated forced synchronization device (42, 44, 62, 64) are provided, wherein the one forced synchronization means (42, 44, 62, 64) with the respective feed devices (54) for the cutting blade (33) is in respective operative connection, so that in particular by actuation of the actuator (40, 60) and the forced synchronizing means (42, 44, 62, 64) operatively connected to the feed means (54) are operated and the cutting knives (33) synchronously or positively synchronously simultaneously and by the simultaneous operation of the feed means (54) are movable or moved in the radial direction. Cutting device (32) according to claim 1, characterized in that upon actuation of the forced synchronization means (42, 44) in each case an intermittent feed movement of the cutting blade (33) can be executed or executed with a predetermined feed length. Cutting device (32) according to claim 1 or 2, characterized in that for each feed device (54) of a cutting blade (33) in each case one with the forced synchronization means (42, 44) operatively connected drive shaft (46) is provided, in particular on the output side, the drive shafts (46) in engagement with a respective spur gear (46) of the respective feed device (54). Cutting device (32) according to claim 3, characterized in that the drive shafts (46) on actuation of the forced synchronization means (42, 44) have the same direction of rotation (D). Cutting device (32) according to claim 1 or 2, characterized in that only one drive shaft (46) has two output sides and on the output side the output sides of the drive shaft (46) each having a spur gear stage (48) of the respective feed device ( 54) are in operative connection. Cutting device (32) according to one of claims 1 to 5, characterized in that an electrical and / or pneumatic drive (40) is provided for the actuator. Cutting device (32) according to claim 6, characterized in that the drive (40) for the actuator is formed in a strand-parallel shaft (38) of the cutting device (32). Cutting device (32) according to claim 6, characterized in that the actuator (40) for the actuator outside of one or the strand-parallel shaft (38) of the cutting device (32) is arranged. Cutting device (32) according to claim 1, characterized in that both feed devices (54) for the cutting knives (33) are operatively connected to a drive (60) provided outside the cutting device (32) by using a shaft (62), so that through the Operation of the drive (60) both feed devices (54) together with the respective cutting blades (33) continuously in the radial direction, preferably synchronously or zwangsssynchron, are movable or become. Cutting device (32) according to claim 9, characterized in that in that , using one, preferably only one, shaft (62) as forced synchronization device (62), which is in respective operative connection with the respective feed devices (54) for the cutting blades (33), operates the drive (60) in operative connection with the Feed device (54) standing wave (62) is actuated or is, so that the feed devices (54) simultaneously and by the simultaneous operation of the feed devices (54), the respective cutting blades (33) are synchronously or zwangsssynchron in the radial direction continuously movable or moved , Cutting device (32) according to claim 9 or 10, characterized in that the shaft (62) as a flexible shaft (62) is formed. Cutting device (32) according to one of claims 9 to 11, characterized in that as the drive (60) of the shaft, an electric drive is provided, wherein in particular the electric drive in a strand-parallel shaft (38) of an abutment of the cutting device (32) arranged or is trained. A method of operating an extrusion machine (10) of the tobacco processing industry, wherein a conveyed strand (17), preferably tobacco rod or filter strand, is cut into rod-shaped articles (34) using a cutting device (32) according to any one of claims 1 to 12. Extrusion machine (10) of the tobacco-processing industry, in particular a filter rod machine or tobacco rod machine, having a cutting device (32) according to one of Claims 1 until 12.

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