EP1800551A2 - Rod cutting device, rod material discharging device and method of operating a rod making device of the tobacco processing industry - Google Patents

Abstract

A tobacco hank cutting assembly (12) has a rotating cutter head (33) with a cutting edge on a rotating (31) holder. The cutter head (33) is essentially parallel to the holder axis of rotation. The cutter head (33) has a thickened zone from its fixture point to the cutting edge forming a tangent or parallel from the holder. Further claimed is a tobacco hank feed assembly, and a process to operate tobacco extrusion assembly.

Description

The invention relates to a strand cutting device of the tobacco processing industry with a rotating cutting body with a cutting edge, wherein the cutting body is arranged on a first body of revolution with a rotation axis. The invention further relates to a Strangmaterialabfördervorrichtung for a strand machine of the tobacco processing industry. Finally, the invention relates to a method for operating a strand machine of the tobacco processing industry.

In an extrusion machine of the tobacco processing industry, the speed of production of the strand produced during commissioning must reach a standard range in order to achieve desired properties of the strand such as strength, durability of a sheath material seam and others to supply the strand with normal further processing. The moment the corresponding properties of the strand are met, a cut, a break or a severing of the strand is made and removed before the cut, the break or cutting strand material produced and fed to the subsequent strand of normal processing.

This is usually achieved by the fact that when restarting a strand machine until reaching a standard speed and the other desired properties of the strand of the strand produced on a different path is performed as the strand, which is to serve for further processing.

For this purpose, guide elements may be provided, such as in the EP 0 286 828 B1 is described. The portion of the strand created before the standard velocity and before the properties of the strand are reached is cut into small pieces with a type of shredder and either discarded or transported away for raw material recovery. In this method, the transition from a first conveying direction, in which the material is conveyed away, to a second conveying direction, in which the strand is conveyed for proper reuse, is critical. In particular, the separation of the two strand sections is critical. The DE 38 13 786 C2 describes a corresponding separation device that works well.

In the operation of a stranding machine it can also happen that, due to a defect, the strand breaks up after leaving a formatting device in which the strand is formed and in which, for example, a wrapping material strip is wrapped around it and closed at an adhesive seam, so that the space downstream the format device can clog very quickly. This material must then be removed manually.

It is an object of the present invention to further develop components of a rod making machine of the tobacco processing industry, which are to serve for safe operation of the stranding machine. In particular, a cutting device is to be specified, by means of which a strand can be cut or severed in such an efficient and secure manner that a section of the strand can be fed after cutting the further processing. It is also intended to specify a strand material removal device, by means of which the recommissioning of a stranding machine is made possible and, if an error occurs in the stranding machine, the strand material not intended for further processing can be efficiently removed. Furthermore, a safe method for operating a strand machine of the tobacco-processing industry should be specified.

This object is achieved by a strand cutting device of the tobacco-processing industry with a rotating cutting body with a cutting edge, wherein the cutting body is disposed on a first body of revolution with a rotation axis, wherein the cutting body is arranged substantially parallel to the axis of rotation of the first body of revolution, and wherein the Cutting body has an extension at least from an attachment point to a cutting edge, which extends through the extension of a tangent of the first body of revolution or a parallel thereto.

Due to the arrangement of the cutting body substantially parallel to the axis of rotation of a first rotating body, a very efficient and accurate cutting can be performed by a strand of the tobacco processing industry. Under first rotary body is in the context of this invention, in particular a rotating To understand body, which may have a rotational symmetry, but this does not have to have. Thus, for example, a partial cylinder may be provided or a cone or a partial cone or just an arm, at the outer end of the cutting body is arranged tangentially or parallel thereto or substantially parallel to the axis of rotation of the first body of revolution, so for example not quite at the end of Poor but radially offset thereto, being tangentially arranged or parallel to the tangential arrangement, in particular, a tangent on the first body of revolution actually meant tangent or a tangent is meant, which may abut a circle generated by rotation.

The tangent or the parallel to the tangent thus preferably extends through an attachment point of the cutting body to a cutting edge, or a parallel to the tangent extends through the extension of the cutting body. Particularly preferred is an embodiment in which the cutting body protrudes at least partially in the longitudinal axial direction of the axis of rotation beyond the first rotary body. Here, the cutting edge of the first rotary body is spaced or spaced from the rotational body, for example, seen below or above the first rotary body relative to the axial direction of the axis of rotation. The cutting edge is preferably moved perpendicular to the rotation axis during the rotation of the first rotation body. The cutting body and the cutting edge preferably project beyond the region of the first rotation body, which is adjacent to the lateral surface or adjoins the lateral surface. The cutting body thus protrudes beyond the end surfaces of the first rotation body. Under strand cutting device is to be understood in the context of the invention, a strand separation device or strand cutting device.

Preferably, the cutting edge is arranged substantially parallel to the rotation axis of the first rotation body. However, the cutting edge can also be arranged obliquely thereto or it can be provided a bevelled cutting edge. The cutting edge is transversely, preferably perpendicular to the tangent or parallels thereto, which extends through the extension of the cutting body arranged.

If the axis of rotation of the first body of revolution is spaced from a longitudinal axis of a strand to be cut, that is offset from the longitudinal axis, a cut can be achieved with minimal or no upset of a moving strand transverse to the direction of movement of the strand.

Preferably, the axis of rotation of the first body of revolution is arranged at an angle to the longitudinal axis of a strand to be cut, which is not equal to 90 °. The angle is to be measured or indicated between the axis of rotation or a projection of the axis of rotation on the longitudinal axis, since the axis of rotation and the longitudinal axis need not necessarily intersect. The angle corresponds to an angle that results from a corresponding parallel displacement of the axis of rotation or the longitudinal axis between the two axes. Preferably, the angle between the axis of rotation of the first body of revolution and the longitudinal axis in the downstream part of the strand is less than 90 °. This angle is preferably adjustable as a function of the speed of the strand and in particular the distance of the axis of rotation to the longitudinal axis in order to allow the cleanest possible cut without compression of the strand.

It is particularly preferred if a groove for guiding a Strangs is provided, on the one hand ensures a clean cut and on the other hand for a good guidance of the strand. The groove extends longitudinally to the strand or can also define the longitudinal axis of the strand at least in the region of the cutting device.

It is further preferably provided a circular-section-shaped groove or opening, which allows a passage of the projecting beyond the first rotary body portion of the cutting body.

The object is further achieved by a strand cutting device of the tobacco processing industry with a rotating cutting body having a knife, wherein the cutting edge of the knife is arranged parallel to the axis of rotation of the cutting body. Preferably, the cutting edge is at least twice as long as the diameter of the strand to be cut or severed. Preferably, the knife extends perpendicular to the axis of rotation about the cutting body. As a result, very precise cuts can be performed. Preferably, the cutting body is a rotary body or a part of a rotary body.

The strand cutting device is particularly efficient when a cutting roller is provided which cooperates with the cutting body. For this purpose, a groove is preferably provided in the cutting roller, in which the knife dips during operation temporarily. Preferably, the cutting body and / or the cutting roller has a recess or a flattening. In the context of the invention, a cutout is, in particular, a cut extending in the rotation body over a certain length parallel to the axis of rotation, so that there is a free space in the rotation body. A flattening is in the context of the invention, in particular a rotating body, was removed from the material. In a cylindrical rotary body, for example, a cylinder section is then removed. In a section through the rotary body then a partial circle section would be removed.

In operation, the recess and / or the flattening serve to leave sufficient space for the strand material, so that it can pass unhindered by the strand cutting device and in particular the cutting body and the cutting roller or can be promoted. This applies on the one hand in operation, if the strand formed is to be used for further processing, as well as when starting, in which, for example, the strand material is guided on another track.

If at least one compressed air nozzle is provided, which is designed to direct compressed air against the strand during operation, the start of the strand production and the transfer of the strand conveying direction from the start into the final production can be assisted. Here, for example, a compressed air nozzle may be provided, which is arranged above the strand and is directed in the strand conveying direction and a little downwards. It can also be provided a compressed air nozzle, which is arranged below the strand and compressed air in the strand conveying direction and a little bit upwards. Depending on the desired strand position, the upper or the lower or both compressed air nozzles can be operated.

The object is further achieved by a strand cutting device with a rotatably movable cutting body, with a cutting edge, wherein the cutting body is movable about an axis of rotation which is transversely to a cutting body cut from the cutting body Strand is dissolved, wherein the axis of rotation is disposed substantially horizontally in the operation of the strand cutting device. Preferably, the cutting body is movable about an axis of rotation which is substantially perpendicular to a strand which can be cut by the cutting body. Preferably, the cutting body is pivotable away from the strand. Wegschwenkbar means within the scope of the invention in particular from the effective range with the strand pivotally.

Preferably, a strand guide is provided, which is structurally arranged with the cutting body, so that they can be pivoted away from the strand about a common pivot axis. The strand guide and the cutting body are configured, for example, such that the axis of rotation of the cutting body and a strand guide surface are substantially parallel to one another.

The pivot axis is preferably arranged substantially parallel to the strand produced. In contrast to DE 38 13 786 C2 is the cutting body according to the invention arranged perpendicular to the cutting body according to the said document. The guide surface is arranged next to the cutting body and not as in DE 38 13 786 C2 quasi housed in the cutting body.

Preferably, a counter-holder is arranged upstream of the cutting device, which supports the strand cutting. The backstop can be a kind of beater. The anvil can experience a slight lead when approaching the strand, so that it already has in the required for a separating cut back position when the cutting body with its cutting blade acts on the strand. The counterpart is contrary to DE 38 13 786 C2 in the conveying direction of the strand before the Cutting body arranged and not as in the aforementioned document behind it.

The object is further achieved by a Strangmaterialabfördervorrichtung for a stranding machine of the tobacco processing industry, wherein two counter-rotating second rotation body are provided, wherein by means of the second rotation body strand material between the second bodies of rotation retractable and then abförderbar, wherein forming a gap between the second bodies of revolution extends substantially in the conveying direction of a strand in the production plant. In the context of the invention, production operation means, in particular, the production or production of a strand in the predeterminable standard speed or a proper strand, which can be conveyed for further processing.

The second rotation bodies are preferably a little bit spaced in order to be able to discharge sufficient strand material through the gap of the second rotation body. The rotational direction of the second rotational body is such that the rotational component of the respective second rotational body faces the closest to the other second rotational body in the same direction, away from the space from which strand material is to be dissipated. Preferably, the axes of rotation of the second rotating body are substantially parallel. The second rotation bodies are preferably cylindrical. However, these can also be conical or each have one arm or more arms. The second bodies of revolution can also be star-shaped in cross-section or represent a geometric figure which is not circular in cross-section. In the case of a conical or truncated cone shape, it may make sense not to arrange the axes of rotation of the second rotating body parallel, in such a way that the tangential surfaces of the lines of the respective lateral surface of the second body of revolution at the point where they come closest, are parallel to each other, so that in particular forms a straight slot.

Preferably, the axes of rotation of the second rotary body are arranged transversely to the conveying direction of a strand. Cross means in the context of the invention that the gap is oriented at an angle of> 0 ° to 40 ° away from the strand, wherein the strand and the gap are arranged in a plane. The slot or gap formed by the second rotary body forms a line which preferably has a component which is arranged parallel to the conveying direction of the strand.

Preferably, the second rotating bodies are pressure-loaded or force-loaded relative to one another. As a result, different amounts of filter material can be carried away without problems. Preferably, a first second rotary body is spring-loaded against a second second rotary body. In the context of the invention, spring-loaded means that the first second rotary body is biased by a spring, such that the first second rotary body presses against the second second rotary body. For this purpose, the first second rotary body is designed to be movable in the transverse-axial direction. Preferably, both second rotation body are biased by springs and both movable accordingly in the transverse axial direction.

Preferably, a second rotary body is a transport roller and particularly preferably both second rotary bodies are respective transport rollers. Instead of transport rollers and cones, levers, one-armed, two-armed, three-armed to n-arm (n integer) rotation body or devices may be provided, the suitable for transporting material. In the event that the second rotary bodies are not rotary bodies in the mathematical sense, but rotating bodies with arms which extend radially, it can be provided that the two second rotary bodies cooperate such that the arms on the lateral surface or on the outer surface interact with each other. However, the arms can also intermesh, for example, if the filter material is to be crushed simultaneously with the discharge. The second rotation body may for example also be formed star-shaped. Preferably, the rotational bodies are formed symmetrically. It can be provided at the second bodies of revolution and depressions and elevations in the circumference or in the lateral surface, which improve the functionality of the transport.

If preferably a strand material guiding device is provided upstream or in the region of the second rotation body, it is ensured that the strand material can also be completely conveyed away. For example, a strand material guide may be a cover that deflects the material in a desired direction.

The object is further achieved by a Strangmaterialabfördervorrichtung comprising a first lever device and a second lever device, wherein a lever device is translationally movable relative to the other lever device. In particular, a translational linear movement is provided relative to one another. Preferably, the first and the second lever device about a common pivot axis, which is in particular substantially parallel to a strand conveying direction, pivotable. In this case, the Strandmaterialabfördervorrichtung can in the effective range with a strand or a strand piece, which promote is to be pivoted to subsequently with a translational, in particular linear movement, a lever device then grab the strand and pull out, for example, from areas in which the strand is still infected. After releasing the strand this can then be removed for example in a container. In this regard, reference should be made in particular to the description of the figures relating to FIGS. 5 to 7.

Preferably, the second lever device has two arms. Particularly preferably, the first lever device is at least partially disposed between the arms of the second lever device. If the first and / or second lever device comprises a roller which can be brought into engagement with the strand material, it can be very safely pulled out of openings in which the strand can still be stuck without first being torn or broken. By this measure, an automation of Strangmaterialabförderns is very easy.

According to the invention, a rod making machine of the tobacco-processing industry is provided with a cutting device which has been described above and / or a strand material discharge device which has also been described above.

The object is further achieved by a method for operating an extrusion machine of the tobacco processing industry, wherein for the production of a strand initially a strand is formed and conveyed and in the case that the production is interrupted, wherein the interruption by an operator or a sensor is triggered, the remaining material in the stranding machine is automatically removed from the stranding machine and then the production is restarted. This process management can be efficient in a production interruption and automatically restarting the strand production, avoiding defective productions of strand material. Preferably, after the start of production, the starting shot is separated and then the strand is fed to the further processing steps. With the subsequent feeding of the strand to the further processing steps in particular the good-production is meant, ie a strand with predetermined properties and / or a strand which has reached a target speed. Preferably, in the event that the strand opens, the strand material is conveyed away via two second rotation body, wherein the second rotation body convey the strand material in a gap forming between the second rotation bodies. The rotating bodies rotate or rotate in order to discharge the strand material correspondingly efficiently.

Preferably, the removal of the strand material by means of lever devices, by means of which the strand material is detected and moved and then released again. Here, in particular strand material is pulled out of openings, which would otherwise lead to faulty production when starting production.

The object is further achieved by a method for operating a rod making machine of the tobacco processing industry, wherein strand material is conveyed through a gap formed by two second bodies of revolution, wherein a strand is formed upstream of the second body of revolution and cut after forming the second body of revolution upstream becomes as soon as a strand is produced with predetermined properties or a target speed is reached, and wherein the relative to the interface downstream portion of the strand carried away is moved and the upstream relative to the interface part of the strand for further processing on the second rotating bodies. This method is particularly suitable for restarting or commissioning a corresponding strand machine of the tobacco processing industry.

Preferably, the rotational speed of the second rotational body is at least temporarily greater than the conveying speed of the strand in the production of the strand. The strand material is thus dissipated a little faster than the strand is formed. The rotational speed of the second rotary body is preferably greater than the speed of a format strip in which the strand is formed. Preferably, the higher speed is provided as long as at least one specifiable property of the strand is not present or a predeterminable strand conveying speed has not been reached. From reaching a predetermined strand conveying speed or from reaching the desired properties, the speed of the second rotating body can be adapted to the conveying speed of the strand.

Fig. 1

eine schematische dreidimensionale Darstellung eines Teils einer erfindungsgemäßen Strangmaschine der Tabak verarbeitenden Industrie,

Fig. 2

eine schematische Schnittdarstellung eines Teils des Ausführungsbeispiels aus Fig. 1 in Seitenansicht,

Fig. 3

eine schematische Darstellung einer erfindungsgemäßen Schneidvorrichtung,

Fig. 4

eine schematische dreidimensionale Darstellung der erfindungsgemäßen Schneidvorrichtung aus Fig. 3,

Fig. 5

einen Teil einer weiteren Ausführungsform einer erfindungsgemäßen Strangmaschine der Tabak verarbeitenden Industrie in schematischer Darstellung,

Fig. 6

den Teil aus Fig. 5 aus einer anderen Perspektive und in einem anderen Verfahrenszustand in schematischer Darstellung,

Fig. 7a

eine erfindungsgemäße Strangmaterialabfördervorrichtung in schematischer Seitenansicht in weggeschwenkter Position,

Fig. 7b

die Vorrichtung aus Fig. 7a in einer zum Strang geschwenkten Position,

Fig. 7c

die Fig. 7b in einer schematischen Draufsicht,

Fig. 7d

die erfindungsgemäße Strangmaterialabfördervorrichtung in einem Schritt des Strangmaterialherausziehens in schematischer Seitenansicht, und

Fig. 7e

eine schematische Draufsicht auf die Vorrichtung gemäß Fig. 7d

The invention will be described below without limiting the general inventive idea by means of embodiments with reference to the drawings. With respect to all details of the invention not explained in detail, reference is expressly made to the drawings. Show it:

Fig. 1

a schematic three-dimensional representation of a part of a strand machine according to the invention of the tobacco processing industry,

Fig. 2

a schematic sectional view of a portion of Embodiment of FIG. 1 in side view,

Fig. 3

a schematic representation of a cutting device according to the invention,

Fig. 4

3 is a schematic three-dimensional representation of the cutting device according to the invention from FIG. 3,

Fig. 5

a part of a further embodiment of a rod making machine according to the invention of the tobacco processing industry in a schematic representation,

Fig. 6

5 shows the part of FIG. 5 from a different perspective and in a different method state in a schematic representation,

Fig. 7a

a Strangmaterialabfördervorrichtung invention in a schematic side view in weggeschwenkter position,

Fig. 7b

the device of Fig. 7a in a position pivoted to the strand,

Fig. 7c

7b in a schematic plan view,

Fig. 7d

the Strangmaterialabfördervorrichtung invention in a step of Strangmaterialausziehens in a schematic side view, and

Fig. 7e

a schematic plan view of the device of FIG. 7d

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.

Fig. 1 shows a schematic three-dimensional representation of a part of an inventive strand machine 10 of the tobacco processing industry, in which example a filter rod 13 is produced. For this purpose, filter material is applied as usual to a wrapping material strip on a format strip and the wrapping material strip is wrapped in the format around the filter material. To seal the wrapping material strip, an adhesive seam is closed. The closed filter strand 13 is then passed through a transport nozzle 16 in the direction of a measuring element, by means of which some. Properties of the filter strand are determined. Subsequently, the filter strand is placed in a cutting device, in which the filter strand is cut into correspondingly large filter elements or filter, to be subsequently brought together with tobacco sticks and further processed to filter cigarettes.

When commissioning a filter rod machine 10 of the tobacco processing industry, the speed of the filter string is first increased to a standard speed. The strand produced to reach the standard speed usually does not have the properties that are desired, which is why this part of the filter strand is usually discharged, as in the EP 0 286 828 B1 shown. According to an alternative removal of the filter material is now provided, in which two second rotation body in the form of transport rollers 19 and 20 are provided in a Strangmaterialabfördervorrichtung 11. The corresponding strand material is covered by a cover 23 forced downward in the direction of the transport roller 19 and 20, so that the transport rollers 19 and 20 in the slot between the two transport rollers 19, 20 seize strand material and promote this through this slot down in Fig. 1. In the case where the strand is not torn but carried off integrally, the conveying speed through the conveying rollers may be slightly higher than the strand speed in the format 47.

After the standard speed is reached in the strand production and the desired properties of the filter strand are also achieved, by means of the knife roller 14 and the cutting roller 15, which are moved synchronously, the strand by interaction of the two rollers 14 and 15 and in particular by the knife 33, cut. The strand 13 is then conveyed as shown in Fig. 1, for further processing. The cover 23 may be disposed at a fixed location. The cover 23 may, however, also be provided movably, such that when the strand material is conveyed away by the strand material removal device 11, the cover 23 is arranged further in the direction of the transport rollers 19 and 20 and, when producing a proper strand 13, which is then conveyed for further processing be driven higher, so as not to block the way. The transport rollers 19 and 20 are driven, for example via a servo motor 17 and a toothed belt drive 18, in the illustrated arrow direction. The knife roller 14 is driven in the direction of the arrow by a servomotor 21 and a spur gear stage 22. Accordingly, the cutting roller 15 is driven.

The indicated in Fig. 1 cutting device 12 is shown more clearly in Fig. 2 in a schematic sectional view.

It may also come in operation of the strand machine 10 according to the invention to a strand bursting, so that due to the length of the signal recording after the determination of Strangplatzers about 3 m to 5 m strand are produced, which can fill the space between a measuring nozzle and the format tape uncontrolled. For this reason, it makes sense to let the transport rollers 19 and 20 run permanently or rotate in order to remove the strand material in a targeted manner and to prevent clogging.

A strand burst can be detected, for example, by an operator, who then initiates a stop of production. Alternatively, a sensor 250 'may be provided in the region between the position of the strand 13 during proper production and the transport rollers 19 and 20. This sensor can detect a strand burst relatively quickly. For example, a photocell can be used for this purpose. Alternatively, a sensor 250 may be arranged below the transport rollers 19, 20. This sensor, which may also be a light barrier, naturally reacts somewhat later than the sensor 250 ', but also relatively early, since in a burst strand relatively quickly material is transported through the transport rollers 19, 20.

In the case of a temporary strand burst, the strand bursts after leaving the cooling web, which is shown for example in FIG. 2 by the reference numeral 27, and is transported further up to a measuring nozzle, which is shown for example in FIGS. 5 and 6. The strand remains attached to the measuring nozzle and kinks. A cover 23 on the strand or over the strand forces the bending of the strand in the direction of the transport rollers 19 and 20. The transport roller 19 is preferably spring-loaded, so that multi-layer strand material can be removed. The Transport rollers detect the strand and promote it via a channel below the transport rollers 19, 20 out of the machine. The machine 10 can detect the strand burst over detectors 250, 250 'and is controlled driven into a stop. When bursting the entire filter strand of the burst strand is conveyed by transport nozzles and the strand cutter directly into the transport rollers 19, 20. The transport rollers capture the strand and convey it out of the machine via a channel. The machine also recognizes the strand bursting over a detector and is controlled in a stop.

For automatically restarting after a controlled stop, the format tape transports the strand until, due to the lack of glue during the controlled stop, it buckles and is pulled in by the transport rollers 19, 20. The transport rollers preferably run at a slight overspeed synchronous to the format band. The strand speed is accelerated to, for example, 80 m / min. After the strand is closed, the Strandabschneiderwalzenpaar or the cutting device 12 separates the strand. The cut strand is conveyed straight into the measuring nozzle, according to the strand conveying direction "operation" 28 of Fig. 2. The separated part of the strand 13 is conveyed away by means of the transport rollers 19 and 20 through a channel of the machine.

In an automatic restart after an unregulated stop, the strand is already drawn between the draw rollers 19, 20. The further procedure corresponds to restarting after a controlled stop, which has been described above.

When automatically starting or commissioning a strand machine according to the invention, the strand comes out of the open Format strip 25, which is shown in Fig. 2. The format strip 25 is deflected here via a deflection roller 26. The strand 13 is shown in Fig. 2, however, not open but closed and in accordance with normal operation of the stranding machine. Due to the open strand, it must be transported through the transport nozzle 16 with the aid of compressed air 24 through the transport nozzle 16, especially here the compressed air nozzles 237 and 238, and the strand cutter or cutting device 12. The open strand is drawn in by the transport rollers 19, 20. Further operation corresponds to starting up and commissioning after a controlled stop.

Downstream of the transport rollers 19, 20 can be provided a Strangzerhäcksler. The cooling web 27 shown in FIG. 2 serves to set the adhesive seam on the wrapping material strip.

For strand cutting, reference is made in particular to FIG. 2, which is a schematic sectional view of part of a stranding machine 10 according to the invention. The strand 13 is pulled at startup from the transport rollers 19, 20 at a slight overspeed. The strand is closed when reaching the standard speed and has, for example, a speed of max. 80 m / min. reached. Shortly before the cut, the speed of the transport rollers 19, 20 is reduced relative to the format strip 25, either at the same speed as the format strip or below this speed. The knife roller 14 and the cutting roller 15 are accelerated to strand speed. The strand is raised and straightened by the cutting roller 15. After cutting knife rotor 14 and cutting roller 15 are braked within 180 °.

In another variant of the process control in the strand cutting according to FIG. 2, the open filter strand 13 is driven by the transport nozzle 16 with the aid of compressed air 24 from the compressed air nozzles 237 and / or 238 and by the knife roller 14 and the cutting roller 15 during startup. For this purpose, corresponding recesses 236, 236 'of the rollers 14, 15 are provided, which are recognizable in FIG. 2 as non-hatched areas. The strand 13 is detected by the transport rollers 19, 20, wherein the strand 13 is still conveyed in a strand conveying direction "approach" 29. The strand 13 is pulled at a slight overspeed compared to the speed of the strand in the format or speed of the format strip 25. Once the strand is closed, or at a time when the strand is closed, the strand cutter 12 is accelerated to twice the strand speed and cuts the strand 13 into pieces. For this purpose, the knife roller 14 and the cutting roller 15 is rotated in a correspondingly illustrated direction of rotation about the rotation axes 234 and 24 '. The cutting edge 233 of the knife 33 comes into operative connection with the strand 13 and dips a little into the groove 235 of the cutting roller 15.

The filter rods or the excess strand material are detected by the transport rollers 19, 20 and transported away. The strand 13, which comes from the cooling web 27 is not kinked. The strand is closed and has a speed of about max. 80 m / min. After the last cut, the knife rollers 14 and the cutting roller 15 are braked within 180 ° and the proper strand is conveyed in the strand conveying direction "operation" 28.

An alternative and particularly preferred cutting concept will now be explained in connection with FIGS. 3 and 4. 3 shows a schematic representation of a cutting device 12 according to the invention. A knife 33 or a knife blade is mounted or arranged on a knife carrier 32 which rotates in a plane inclined to the strand 13, in a direction of rotation indicated by w in FIG Fig. 3 is indicated. Due to the inclined plane, the knife 33 cuts the path of the strand 13 only at one point. The strand 13 runs, as shown in Fig. 4, through a downwardly open groove. However, the cutting device 12 can also be arranged so that the groove is not open downwards but to the side or upwards. 4, the cutting device 12 according to the invention is shown in a schematic three-dimensional representation.

The pivot point or the axis of rotation 31 is offset by the dimension A from the strand axis 30, so that when cutting a movement component in the strand conveying direction corresponding to the strand speed is formed. This component of motion is indicated by V _X. The actual movement is indicated by the vector V _T. The movement component transverse to the strand conveying direction is indicated by V _Y. By an optimal design of the dimension A in relation to the strand speed and the engine speed or the rotational speed of the blade carrier w, the compression that the strand 13 experiences during the cut can be reduced to a minimum. For example, the compression can be less than 1 mm.

Advantage of this arrangement is that a completely burst strand can not be dammed because he can not hit any interference edges. In addition, the strand 13 can be easily deflected downwards. The transport nozzle 16, the in Fig. 2 and in Fig. 1 is shown, can be omitted. The design effort for the cutting device is reduced considerably.

In addition, a cutting edge 34 of the blade 33 is indicated and also an attachment point 46 of the blade 33 on the blade carrier 32. The blade carrier, as shown in Fig. 3, be partially rotationally symmetrical, but it may also be a simple lever or arm. In the case of a lever or arm or in the case of Figures 3 and 4 in a partially rotationally symmetrical body, it may be useful to compensate for imbalances.

In production, the lever 37 is pivoted away and the knife 33 is stopped. The strand 13 passes through a downwardly open groove 36. In a strand burst, the strand is deflected downwards and can be captured by the transport rollers 19, 20, which are not shown in Figures 3 to 6, but are arranged in slot 48 , In the starting operation, namely when the strand is closed, the rotational speed of the tension or transport rollers 19, 20 is reduced and the lever 37 is pivoted upwards. The servomotor 21 for the knife carrier 32 accelerates in 300 ° to a very high speed, which is adapted to the strand speed with the offset A. The cut is made in the following 60 °. Afterwards, the motor is decelerated to 300 ° and slowly turned backwards to the starting position.

In FIGS. 5 and 6, part of a stranding machine 10 according to the invention is shown schematically in three dimensions in another embodiment. Here, a cutting device 112 is used in another embodiment of the invention. In the cases of FIGS. 5 and 6, the axis of rotation of the circular blade 132 is horizontal in operation.

In Fig. 5, the entire cutting device 112, which is arranged on the lever arm 38, pivoted away from the strand 13 upwards. The strand 13 is divided into a discharged strand 13 'and a strand 13 "which corresponds to a properly manufactured strand intended for further processing It is, of course, the case that the two strand sections 13' and 13" can not prevail at the same time only as an alternative, both partial strands or strands being shown for illustration purposes.

The strand 13 ', enters a shaft 48. The properly prepared strand 13 ", which is used for further processing, by a measuring element 40, which can also be referred to as a measuring nozzle 40, out and then, which is not shown in corresponding 5, a cover 39 is also provided which is pivoted down during operation In operation, the cutting device 112 is pivoted towards the strand 13. For this purpose, the lever arm 38 is moved downwards and, in addition, the pivoting arm 44, which is connected to the cutting device 112 pivoted about the pivot axis 43. In addition, the lever 137 is pivoted to the strand via the pivot axis 42. The pivoting of the cutting device 112 is done via the pivot arm 44 horizontally, so that a safe approach to the strand 13 is possible to provide an engagement of the knife with the strand.

The machine 10 comprises a device 11 '(strand material removal device) for removing an improper strand section 13 "from the measuring nozzle 40. The device 50 has three rollers 51, 52, 53, the rollers 51, 52 being mounted on a first forked Lever 54 and the roller 53 are arranged on a second lever Axes of the rollers are substantially parallel to each other.

Upon an intentional or unintentional stop of the machine 10, a portion of the string 13 "remains stuck in the metering nozzle 40 and prevents automatic restarting For, in particular, automatic removal of this string member, the levers 54 and 55 are moved so that the rollers 51, 52, 53 over the strand with the rollers 51, 52 coming to a halt in front of the strand and the roller 53 behind the strand, then the roller 53 is moved by the lever 55 onto the rollers 51, 52 towards and between them; whereby the strand part is detected and pulled out of the measuring nozzle 40. Subsequently, the roll 53 is moved back, whereby the strand part is released and falls into the shaft 48. A sensor 250 can be provided to detect a strand burst and a stop signal to generate, which sets an inventive operating procedure in motion.

The machine 10 further comprises a different kind of cutting device 112 for severing the strand 13. It cutting device 112 consists essentially of a circular blade 132, which may have a corrugated or toothed cutting edge, a lever 137 for supporting the strand 13 and a guide surface 150 for deflecting the improperly prepared strand 13 ', in particular in Fig. 5 down in the shaft 48 on.

To start the machine, the strand 13 'is passed into the shaft 48, this can be supported by air nozzles or conveyor rollers, not shown. As soon as the desired speed for introducing the strand into the measuring nozzle 40 is reached, the cutting device 112 is pivoted into the region of the strand 13 ', whereby first the guide surface 150 ensures that that the strand 13 'does not come into contact with the knife 132. At this time, the cutting edge of the knife 132 is behind the strand and the lever 137 in front of the strand. Before or behind the strand is relative to the viewing position of the viewer of FIGS. 5 and 6 to understand. Subsequently, the lever 137 is moved against the strand 13 'and the knife driven in the opposite direction through the strand, which is severed. The proper strand 13 "passes through and through its own rigidity to and through the metering nozzle 40. Finally, the cutter 112 is pivoted back out of the region of the string 13" to reduce the risk of material jamming in front of the metering nozzle in the event of unwanted stranding.

In the case of a strand breaker, filter material may be drawn through the format belt 25 into the gap 151 between the format belt 25 and the transport nozzle 16 (FIG. 2) or a scraper 49 (FIGS. 5, 6) and there to a material jam leads, which would have to be removed manually. To prevent this, a blowing air nozzle, not shown, may be arranged in the gap in question, which blows through the gap against the direction of travel of the format strip to separate any filter material applied to the format band before it is drawn into the gap.

With reference to Figures 7a to 7e, the operation of the Strandmaterialabfördervorrichtung 11 'will be described in more detail. FIG. 7 a shows a schematic side view of a strand material removal device 11 'according to the invention in a position pivoted away from the strand 13. It can be seen the rollers 52 and 53. The roller 52 is articulated on the lever 54 and thus fixed relative to the lever 54 and the rotation axis 239 or pivot axis 239, however, rotatable.

A linear actuator 240 is provided to permit pivoting of the strand material delivery device 11 '. The linear drive is attached to the lever 54. On the lever 54, a linear drive 241 is arranged, from which a lever 55 protrudes, which is connected to the roller 53. The lever 55 is translationally linearly movable relative to the lever 54, so that as shown below, the relative position of the roller 53 to the rollers 51 and 52 may change. In Fig. 7a is also schematically the conveying direction 242 of the strand 13 is shown. FIG. 7b shows the strand material removal device according to the invention from FIG. 7a in a position pivoted to the strand 13. A corresponding plan view to the representation from FIG. 7b is shown in a schematic representation in FIG. 7c. In Fig. 7c, the roller 51, which is articulated to the arm 57 and the roller 52, which is articulated on the arm 56, to recognize better. If there is now strand material or a part of a strand 13 in the machine, and an automatic clearing of this strand material is desired, for example when the strand material is inserted in a measuring element 40, the lever 55 is translationally linear in the direction of strand 13 and above it by means of the linear drive 241 moved out. The movement also goes beyond an imaginary connecting line of the two rollers 51 and 52. As a result, the strand material 13 is pulled away from the roller 51 and behind the roller 52, as shown in FIGS. 7d and 7e, so that the strand material 13 can be pulled out of the measuring element 40, for example. Subsequently, the lever 55 is again moved back linearly translational, so that the strand material 13 is released and can be removed.

LIST OF REFERENCE NUMBERS

10

Filter rod machine

11, 11 '

Strangmaterialabfördervorrichtung

12

cutter

13, 13 ', 13 "

strand

14

knife roll

15

cutting roller

16

transport jet

17

servomotor

18

toothed belt drive

19

transport roller

20

transport roller

21

servomotor

22

spur gear

23

cover

24

compressed air

25

format tape

26

idler pulley

27

cool bar

28

Strand conveying direction "Operation"

29

Strangförderrichtung "start"

30

longitudinal axis

31

axis of rotation

32

blade carrier

33

knife

34

cutting edge

35

knife groove

36

guide

37

lever

38

lever arm

39

cover

40

measuring element

42

swivel axis

43

swivel axis

44

swivel arm

46

attachment point

47

format

48

shaft

49

scraper

51

role

52

role

53

role

54

lever

55

lever

56

poor

57

poor

112

cutter

132

circular blade

137

lever

150

guide surface

151

gap

233

cutting edge

234

axis of rotation

234 '

axis of rotation

235

groove

236, 236 '

recess

237

compressed air nozzle

238

compressed air nozzle

239

swivel axis

240

linear actuator

241

linear actuator

242

Strand conveying direction

250

sensor

250 '

sensor

Claims (39)

A strand cutting device (12) of the tobacco processing industry comprising a rotating cutting body (33) having a cutting edge (34), the cutting body (33) being disposed on a first rotating body (32) having a rotation axis (31), the cutting body (33 ) is arranged substantially parallel to the axis of rotation of the first rotary body (32), characterized in that the cutting body (33) has an extension at least from an attachment point (46) to a cutting edge (34), wherein by the extension a tangent of the first Rotary body (32) or a parallel extending thereto. Strand cutting device (12) according to claim 1, characterized in that the cutting body (33) at least partially in the longitudinal axial direction of the axis of rotation (32) beyond the first rotary body (32) protrudes. Strand cutting device (12) according to claim 1 or 2, characterized in that the cutting edge (34) is arranged substantially parallel to the rotation axis (31) of the first rotation body (32). A strand cutting device (12) according to any one of claims 1 to 3, characterized in that the rotation axis (31) of the first rotation body (32) is spaced from a longitudinal axis (30) of a strand (13) to be cut. Strand cutting device (12) according to one of claims 1 to 4, characterized in that the axis of rotation (31) of the first rotary body (32) at an angle to the longitudinal axis (30) of a strand to be cut (13) is arranged, which is not equal to 90 ° , Strand cutting device (12) according to claim 5, characterized in that the angle between the axis of rotation (31) of the first rotary body (32) and the longitudinal axis (30) in the downstream part of the strand (13) is less than 90 °. Strand cutting device (12) according to one of claims 1 to 6, characterized in that a groove (36) for guiding a strand (13) is provided. Strand cutting device (12) according to one of claims 2 to 7, characterized in that a circular section-shaped Groove (35) or opening is provided, which allows a passage of the over the first rotary body (32) projecting part of the cutting body (32). A strand cutting device (14, 15) of the tobacco processing industry comprising a rotating cutting body (14) having a knife (33), characterized in that the cutting edge (233) of the blade (33) is parallel to the axis of rotation (234) of the cutting body (23). 14) is arranged. Strand cutting device (14, 15) according to claim 9, characterized in that the knife (33) extends perpendicular to the axis of rotation (234) over the cutting body. Strand cutting device (14, 15) according to claim 9 or 10, characterized in that the cutting body (14) comprises a rotary body or a part of a rotary body. Strand cutting device (14, 15) according to one of claims 9 to 11, characterized in that a cutting roller (15) is provided, which cooperates with the cutting body (14). Strand cutting device (14, 15) according to claim 12, characterized in that the cutting roller has a groove (235), in which the knife (33) immersed during operation temporarily. A strand cutting device (14, 15) according to any one of the claims 11 to 13, characterized in that the cutting body (14) and / or the cutting roller (15) has a recess (236, 236 ') or a flattening. Strand cutting device (14, 15) according to any one of claims 9 to 14, characterized in that at least one compressed air nozzle (237, 238) is provided, which is designed to direct compressed air (24) against the strand (13) during operation. A strand cutting device (112) having a rotatably movable cutting body (132) with a cutting edge, wherein the cutting body (132) is movable about an axis of rotation which is transverse to a strand which can be cut by the cutting body, characterized in that the axis of rotation during operation of the strand cutting device ( 112) is arranged substantially horizontally. A strand cutting device (112) according to claim 16, characterized in that the cutting body (132) is pivotable away from the strand. Strand cutting device (112) according to claim 17, characterized in that a strand guide is provided, which is structurally arranged with the cutting body (132), so that it can be pivoted away from the strand about a common pivot axis. A strand cutting device (112) according to any one of claims 16 to 18, characterized in that upstream of the cutting device (112) there is disposed an anvil (132) which assists in strand cutting. Strangmaterialabfördervorrichtung (11) for a stranding machine (10) of the tobacco processing industry, wherein two counter-rotating second rotation body (19, 20) are provided, wherein by means of the second rotation body (19, 20) strand material (13 ') between the second rotation bodies (19 , 20) is retractable and can then be removed, wherein a gap forming between the second rotational bodies (19, 20) extends essentially in the conveying direction of a strand (13) in the production operation. Strangmaterialabfördervorrichtung (11) according to claim 20, characterized in that the axes of rotation of the second rotary body (19, 20) are substantially parallel. Strangmaterialabfördervorrichtung (11) according to claim 20 or 21, characterized in that the axes of rotation of the second rotary body (19, 20) transversely to the conveying direction (28) of a strand (13) are arranged. Strangmaterialabfördervorrichtung (11) according to any one of claims 20 to 22, characterized in that the rotary bodies (19, 20) are pressure-loaded relative to each other. Strangmaterialabfördervorrichtung (11) according to claim 23, characterized in that a first second rotary body (1) is spring-loaded against a second second rotary body (20). Strangmaterialabfördervorrichtung (11) according to any one of claims 20 to 24, characterized in that a second rotary body (19, 20) is a transport roller. Strangmaterialabfördervorrichtung (11) according to any one of claims 20 to 25, characterized in that a strand material guiding device (23) upstream or in the region of the second rotary body (19, 20) is provided. Strangmaterialabfördervorrichtung (11 ') comprising a first lever device (53, 55) and a second lever device (51, 52, 54), wherein a lever device (53, 55) relative to the other lever device (51, 52, 54) is translationally movable. Strangmaterialabfördervorrichtung (11 ') according to claim 27, characterized in that the first and the second lever device (51 - 55) about a common pivot axis (239), which is in particular substantially parallel to a strand conveying direction (242), pivotable. Strand material removal device (11 ') according to claim 27 or 28, characterized in that the second lever device (51, 52, 54) has two arms (56, 57). Strand material removal device (11 ') according to claim 29, characterized in that the first lever device (55) is at least partially disposed between the arms (56, 57) of the second lever device (51, 52, 54). Strangmaterialabfördervorrichtung (11 ') according to any one of claims 27 to 30, characterized in that the first and / or second lever device (51 - 55) comprises a roller (51 - 53), which is engageable with strand material (13). Extrusion machine (10) of the tobacco-processing industry with a cutting device (12) according to one of claims 1 to 19 and / or a strand material removal device (11) according to one of claims 22 to 31. A method of operating an extrusion machine (10) of the tobacco processing industry, wherein for the production of a strand (13) first a strand (13) is formed and conveyed and in the case that the production is interrupted, wherein the interruption by an operator or a sensor (250, 250 ') is triggered, the material remaining in the stranding machine (10) is automatically removed from the stranding machine (10) and then the production is restarted. A method according to claim 33, characterized in that after the start of production of the starting shot is separated and then the strand is supplied to the further processing steps. A method according to claim 33 or 34, characterized in that in the event that the strand (13) opens, the strand material (13 ') via two second rotation body (19, 20) is conveyed away, wherein the second rotation body (19, 20 ) convey the strand material (13 ') into a gap forming between the second bodies of revolution. Method according to one of claims 33 to 35, characterized in that the removal of the strand material (13) by means of lever devices (51 - 55) takes place, by means of which the strand material (13) detects and moves and then is released again. Method for operating an extrusion machine (10) of the tobacco processing industry, in particular according to one of claims 33 to 36, wherein strand material (13 ') is conveyed away through a gap forming two second bodies of revolution (19, 20), upstream of the second Rotary body (19, 20) is formed a strand (13) and after forming upstream of the second rotary body (19, 20) is cut as soon as a strand (13) is produced with predetermined properties or a target speed is reached, and wherein the relative to the interface downstream portion of the strand (13 ') is conveyed away and the upstream relative to the interface part of the strand (13 ") for further processing on the second rotating bodies (19, 20) is passed. Method according to one of claims 33 to 37, characterized in that the rotational speed of the second rotary body (19, 20) at least temporarily greater than the conveying speed of the strand (13) in the manufacture of the strand (13). A method according to claim 38, characterized in that the higher speed is provided as long as at least one predetermined property of the strand (13) is absent or a predetermined strand conveying speed is not reached.

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