CN111434249A

CN111434249A - Device and method for dividing open width and device for producing strips

Info

Publication number: CN111434249A
Application number: CN202010036841.3A
Authority: CN
Inventors: J-H.克林德沃特; S.彼得斯; T.布施; S.埃尔斯纳; B.库尔茨; J.布莱旺斯卡; M.埃尔根迪
Original assignee: Hauni Maschinenbau GmbH
Current assignee: Koerber Technologies GmbH
Priority date: 2019-01-14
Filing date: 2020-01-14
Publication date: 2020-07-21
Anticipated expiration: 2040-01-14
Also published as: EP3680078B1; PL3680078T3; EP4241941A3; EP4241941A2; EP3680078A1; DE102019100755A1; CN111434249B

Abstract

The invention relates to a device (11) for dividing a flat web (6) consisting of a web material into a plurality of strips (14), wherein the device (11) comprises a separating means (12) and a deflecting means (13), wherein the separating means (12) comprises a first roller and a second roller (26, 28) interacting with the first roller, and wherein the outer lateral surfaces (30, 32) of the rollers (26, 28) have grooves (34) and blades (36) which are closed around in the circumferential direction of the respective roller (26, 28) along the axial direction (A) in an alternating manner, and in the region of action the blades (36) of the first roller (26) engage in the grooves (34) of the second roller (28) and the blades (36) of the second roller (28) engage in the grooves (34) of the first roller (26).

Description

Device and method for dividing open width and device for producing strips

Technical Field

The invention relates to a device for dividing a flat web of web material into a plurality of strips, comprising a separating device and a deflecting device, wherein the separating device comprises a first roller and a second roller which interacts with the first roller, wherein the outer sides of the rollers alternately have circumferential grooves and blades which are closed in the circumferential direction of the respective roller in the axial direction, and in an active region the blades of the first roller engage in the grooves of the second roller and the blades of the second roller engage in the grooves of the first roller, and the separating device is designed to divide the flat web into a plurality of adjacent strips, and wherein the deflecting device comprises at least one deflecting element, the webs of which engage in the grooves of the first roller or the second roller. The invention further relates to a device for producing a rod for the tobacco processing industry, comprising such a device for dividing open width.

The invention also relates to a method for dividing a flat web of web material into a plurality of strips, in which method the flat web is divided into a plurality of adjacent strips by means of a separating device comprising a first roll and a second roll which interacts with the first roll, wherein the outer sides of the rolls alternately have circumferential grooves and blades which are closed in the circumferential direction of the respective roll in the axial direction, and in the active region the blades of the first roll engage in the grooves of the second roll and the blades of the second roll engage in the grooves of the first roll, wherein the strips are removed from the grooves of the first or second roll by means of a deflecting device comprising at least one deflecting element, the webs of which engage in the grooves of the first or second roll.

Background

An apparatus for producing a sliver is known, for example, from DE 1954036 a, which apparatus comprises a separating device for dividing the open width. The open width is cut into parallel strips by means of a circular knife cutting device. The strips are then combined to form a single strip and surrounded by a sheath. In the known apparatus, a flat web of reconstituted tobacco material is processed. The manufactured and wrapped rod is cut into pieces of predetermined length, thereby enabling the manufacture of rod-shaped smoking articles.

From US 5,025,814 an apparatus is known which comprises a pair of cutting rolls for dividing a flat web into a number of strips. The device further comprises a guide comb positioned such that the tines of the comb extend into the gap between adjacent blades of the cutting roller. Furthermore, the device comprises a cleaning comb, the tines of which likewise engage in the grooves between the blades.

Disclosure of Invention

The object of the present invention is to provide a device and a method for dividing a flat web and a device for producing strips, wherein the flat web should be reliably divided into individual strips.

This object is achieved by a device for dividing a flat web of web material into a multiplicity of strips, comprising a separating mechanism and a deflecting mechanism, wherein the separating mechanism comprises a first roller and a second roller which interacts with the first roller, and wherein the outer side of the rollers in the axial direction alternately has circumferential grooves and blades which are closed in the circumferential direction of the respective roller, and in an active region the blades of the first roller engage in the grooves of the second roller and the blades of the second roller engage in the grooves of the first roller, and the separating mechanism is set up for dividing the flat web into a multiplicity of adjacent strips, and wherein the deflecting mechanism comprises at least one deflecting element, the webs of which engage in the grooves of the first roller or the second roller, wherein the device is improved in that, namely: the at least one deflecting element is partially designed as a plate-like deflector, which forms a closed surface downstream of the region of action of the separating means, said closed surface extending in the axial direction beyond the at least two webs.

When dividing a flat web of web material, in practice the following always occurs again: downstream of the active zone, the strip is jammed in a groove between the blades of the roller and follows the direction of rotation of the roller. To avoid this, deflectors or combs are used, as are known, for example, from US 5,025,814, which guide the strip from the groove bottom back to the outer side of the roll. It has however proved that the individual strips of such known deflectors are often guided unreliably. A possible consequence is a ribbon break, which leads to disturbances to the production process.

In the context of the present invention, it can be found that such disturbances to the production process can be effectively avoided by a plate-shaped deflector, which is arranged downstream of the region of action of the separating means and is formed as a closed surface. The individual strips produced by the separating means are guided over the surface of the plate-like deflector and can be further processed by means of downstream-located means. The reliability of the device and the quality of the product, i.e. the mass of strips, produced with the device can be improved.

The plate-like deflector of the deflection mechanism extends outside the roller. The position of the deflector can be understood from the following explanation. The deflection mechanism comprises at least one, in many cases two, deflection elements, the division bars of which run partly in the grooves between adjacent blades of the roll. These sections or regions of the division bar extend within the cylindrical outer side of the roller. The outer circumference of the blade of the roller struts the outer side surface of the cylinder. The blade of the first roller struts the outer side surface of the first cylinder, and the blade of the second roller struts the outer side surface of the second cylinder. The first and second cylindrical outer side faces overlap each other, as viewed in a cross section perpendicular to the rotational axis of the roll. The axes of rotation of the rollers are oriented parallel to each other. They extend in the axial direction. The overlapping area of the outer side of the cylinder shall be referred to as the region of action. The plate-like deflectors are located outside and downstream of this region of action. The deflector is outside the roller, i.e. outside the area or space enclosed by the first and second outer cylindrical side surfaces.

According to an advantageous embodiment, it is provided that the extent of the plate-shaped deflector in the axial direction is greater than or equal to the dimension of the active region in the axial direction. The dimension of the plate-shaped deflector in the axial direction is therefore designed to be greater than the dimension of the region of action of the separating means in this direction. It is thus ensured that no strip produced by the separating means falls off at the edge region of the plate-like deflector and can be lost for subsequent production steps. The reliability of the device with respect to uninterrupted production is further improved by such a design of the plate-shaped deflector.

According to a further advantageous embodiment, the device is improved in that: the webs of the at least one deflection element are held on one side on the plate-shaped deflector and extend from the deflector in the direction of their respective free end into the groove of the first or second roller.

In other words, the deflection elements are designed such that their webs are connected to one another only on the outlet side, i.e. by means of a deflector arranged downstream of the region of action, but not on the inlet side. The deflecting element thus formed is of plate-like and closed design only downstream of the region of action, which can be assembled significantly more easily. Thus, for example, the deflecting element can be installed or also replaced without having to disassemble the roller of the separating device or one of the two rollers of the separating device. This is always necessary for devices which are closed both on the inlet side and on the outlet side. However, since this is not provided according to the embodiment mentioned, great advantages arise in terms of assembly and maintenance of the device for dividing open width.

In particular, provision is furthermore made for the height of the division bar, viewed in cross section, to be designed to be much greater than the width in order to impart the required mechanical stability to the division bar. This applies in particular to a deflecting element formed according to the preceding embodiment, that is to say a deflecting element whose webs are held on one side only on a plate-shaped deflector.

According to a further advantageous embodiment, it is provided that at least one of the webs of at least one of the deflection elements, in particular all webs of all deflection elements, has a T-shaped cross section.

If a dividing plane is defined which is perpendicular to the shortest connecting line between the two axes of rotation of the rollers of the separating means, the flat side of the cross section of the T is oriented in the direction of this dividing plane. If the T is viewed with it written straight, the flat side in question is the upper side of the T. The cross section of the division bars is viewed in a plane oriented transversely, in particular perpendicularly, to the longitudinal extension of the respective division bar. It is also in this plane that the division bars are viewed from the aforementioned features, whereby the height of the division bars is designed to be greater than the width. The height of the parting strips should accordingly be measured in the direction of the parting plane. In other words, the division bars have a larger dimension in a direction perpendicular to the separation plane than in a direction parallel to the separation plane.

However, if the height of the division bar is configured to be greater than the width, accumulation of dirt or adhesion between the division bar and the groove side edge of the roll can easily occur when dividing relatively wet material, which in the worst case can jam the separating mechanism. The design of the division bar with a T-shaped cross section is advantageous because the part of the division bar which is only in contact with the strip divided from the open width and presses the strip out of the groove of the roller fills almost the entire groove width. The sections adjoining further in the direction of the groove base are configured to be significantly narrower (viewed in the axial direction of the roller), as a result of which dirt can no longer catch the separating means so easily. Likewise, dirt can fall out of the deflector in the direction of the trough bottom and can be removed, for example scraped off, from the trough bottom, for example by a downstream device.

The device is furthermore particularly designed such that the deflection means comprise a first and a second deflection element which are arranged on opposite sides of the dividing plane, wherein the shortest connecting line between the first axis of rotation of the first roller and the second axis of rotation of the second roller is perpendicular to the dividing plane, wherein the two deflection elements are arranged on both sides of the dividing plane, in particular mirror-symmetrically with respect to the dividing plane.

In particular, an asymmetrical arrangement is also provided, in which the two deflecting elements are not arranged mirror-symmetrically with respect to the dividing plane. For example, it is provided that one of the two deflectors is arranged closer to the separating surface than the other deflector. This can be in particular a geodetically lower deflector. This deflector can be arranged, for example, immediately adjacent to the separating surface, i.e. immediately below it. The strip emerging from the separating device can thus be supported from below, so that it can be fed to further process steps more or less within the separating plane.

In particular, it is also provided that the two deflectors are divided downstream, i.e. in the process direction in a funnel-like manner. In this case, an asymmetrical arrangement can also be provided, so that, for example, only the upper (geodetically higher) of the two deflectors can be formed in a curved manner, so that a funnel-shaped widening results.

If the first roller and the second roller have the same large radius, the parting plane is as far from the first and second axis of rotation. For rolls with a not equally large radius, the dividing surface is closer to the roll with the smaller radius. The first and second cylindrical outer sides intersect along two lines running parallel to each other. The two lines are in the splitting plane.

Thus, one deflection element is provided per roller. The strips possibly present in the grooves between the blades as a result of the splitting process can be lifted from the associated roller by the respective deflection element. Subsequently, the strip is reliably guided over the first deflection element or the second deflection element.

Furthermore, it is provided according to a further embodiment that the webs of the at least one deflecting element extend partially in the partial region of the grooves of the first or second roller, wherein the plate-shaped deflector is connected downstream to the webs and all webs are connected to one another, and wherein in particular the plate-shaped deflector and the webs are formed in one piece.

The plate-like deflector is downstream of the division bar. The division bar is partially located downstream of the region of action. The spacers are transformed into plate-like deflectors in abutment with the outer lateral surface of the cylinder defined by the blades. In this case, the plate-like deflector is as close as possible to the outer cylinder surface. However, the distance between the cylindrical outer side and the plate-shaped deflector is only selected to be so small that a free rotatability of the associated roller about its axis of rotation is ensured.

In this case, it is particularly advantageous if the plate-shaped deflector and the division bar are formed in one piece. For example, the deflecting element is made in one piece. The division bar is produced, for example, by making a slot in a flat component. The deflection element is therefore preferably constructed as a material-integral structure. In particular, it is also provided that the deflection element is formed flat, that is to say completely flat. However, it is also provided that one or both deflection elements are formed in a curved manner. For example, the deflection element can be curved, viewed in cross section perpendicular to the axial direction, in such a way that a funnel-shaped opening is produced both on the inlet side and on the outlet side. Upstream of the region of action, that is to say counter to the material flow direction, this funnel widens in the feed region. Downstream of the region of action of the separating means, i.e. in the direction of material flow, the other funnel likewise widens.

According to another embodiment, the first and/or second plate-like deflector comprises a further plate-like deflector upstream of the region of action. The multiplicity of webs of the first and/or second deflecting element thus likewise extends partially in the partial region of the groove upstream of the region of action of the separating means and transforms into a further plate-like deflector at a further upstream position. The further plate-like deflector is connected upstream to the division bar of the deflecting element.

According to a further embodiment, it is provided that the at least one deflection element is designed to apply a spring force acting in the direction of a dividing plane to the open width or the web, wherein a shortest connecting line between a first rotational axis of the first roller and a second rotational axis of the second roller is perpendicular to the dividing plane, wherein in particular the at least one deflection element is designed as a spring-elastic element and/or is mounted in a spring-loaded manner.

In other words, the first deflection element is supported in such a way that it exerts a spring force in the direction of the second roller or is spring-loaded in this direction. Accordingly, the second deflection element is supported in a spring-loaded manner in the direction of the first roller or in this direction. The spring force can be adjusted.

In particular, it is provided that the first and/or second deflection element is designed or supported in an adjustable manner, and more precisely in an adjustable manner in the direction of the respectively opposite roller. The first and/or second deflection element can thus be adjusted. They are fed transversely all the way to the opposite roller so that the strip of web material is applied between the surface of the division bar of the deflecting element and the outer end face of the blade. The material thickness of the web material is compensated for by the spring action or the resilient support of the deflection element.

According to a further embodiment, it is provided that the at least one deflection element has at least one S-shaped deflection, viewed in a plane perpendicular to the axial direction. In particular, it is provided that the first and/or second deflection element has a first S-shaped deflection (S-Schlag) in a first direction and a further S-shaped deflection in the opposite direction. Thus, for example, an enlarged entry region (first S-shaped runout), a region of the first and second deflection elements having a minimum distance from one another (between the first and second S-shaped runouts) and an enlarged exit region (second S-shaped runout) can be provided.

According to another embodiment, the device is improved by: furthermore, a scraping mechanism is provided, which comprises a first and/or a second comb-shaped scraper with a plurality of tips, wherein the tips of the first scraper engage in the grooves of the first roller for cleaning the first roller and the tips of the second scraper engage in the grooves of the second roller for cleaning the second roller, wherein the scraping mechanism comprises a suction mechanism for sucking out particles removed from the rollers by the scrapers.

The particle suction provided is advantageous because particles which may remain in the roller as a result of the separation process can in this way be removed from the ongoing production process. The particles can be returned to the production process at other locations or removed.

According to another embodiment, the device is designed such that the at least one deflection element is mechanically coupled to at least one exciter, which is designed to vibrate the deflection element periodically or non-periodically.

For this purpose, for example, at least one suspension of the deflection element is designed as an exciter. Suitable vibration generators are, for example, piezoelectric actuators, eccentric wheels or ultrasonic generators. It is also provided that a mechanical element which rotates with the degree of unbalance is used as exciter. By placing the deflection element in vibration, the wear of the deflection element can be reduced. Furthermore, mechanical jamming (jamming) of the roller by the strip is prevented or eliminated.

According to a further embodiment, it is provided that the separating device is designed to separate directly adjacent strips from one another in the region of action along a predetermined separating line by: the open width is stretched transversely to the separation line so strongly that it tears along the separation line.

For such a device, the first roller and the second roller are not in direct contact with each other in the region of action. The open width is not cut along the separation line by the interaction of the two blades, but is torn in a defined manner by overstretching. Since the open width is not cut but torn open in a defined manner, an open structure is formed at the break edge, i.e. at the side edge of the band. Due to this open structure, the strips of web material are better suited for absorbing additives, for example, or for releasing additives, for example, also when heated.

According to a further embodiment, it is provided that the first and/or second roller is designed as an intermittent roller, wherein all the blades of the intermittent roller each comprise at least one recess which interrupts the cutting edge of the blade, wherein the recess in the blades of the intermittent roller is arranged along a spiral and this spiral is located in a cylindrical circumferential surface which is braced by the cutting edge of the blade, and the axis of the spiral coincides with the rotational axis of the intermittent roller.

A "recess" is to be understood in the context of the present description as a gap or a groove which is undercut into the respective blade in such a way that it interrupts the cutting edge of the blade. "helix" shall mean a helix with a constant slope. The voids arranged along the spiral give rise to the following results, namely: the open width is divided by the separating device in such a way that the individual strips are connected to one another in pairs, adjacent to one another, by means of separating webs. Thus, even in the event of a break or tear of the strip, loss of the individual strips from the process can be avoided. The defective strip is returned to the process with the next transverse divider.

The individual strips are produced from the web material, for example reconstituted tobacco material, P L a film, paper web or other web material, and the open width is produced from the web material.

The object is also achieved by a device for producing strips for the tobacco processing industry, comprising a device according to one or more of the above-mentioned embodiments, wherein the device further comprises a strip-forming unit, which is set up for forming strips from a plurality of strips.

By means of such an apparatus, rod-shaped articles of the tobacco processing industry can be produced, for example, HNB (Heat-not-Burn) -products (english) if reconstituted tobacco material is used as web material.

The object is also achieved by a method for dividing a flat web of web material into a plurality of strips, wherein the flat web is divided into a plurality of adjacent strips by a separating device comprising a first roll and a second roll which interacts with the first roll, wherein the outer sides of the rolls alternately have circumferential grooves and blades which are closed in the circumferential direction of the respective roll and in the region of action the blades of the first roll engage in the grooves of the second roll and the blades of the second roll engage in the grooves of the first roll, wherein the strips are removed from the grooves of the first or second roll by a deflecting device comprising at least one deflecting element, the webs of which engage in the grooves of the first or second roll, and wherein the method is improved in that, namely: the strip is guided downstream of the region of action of the separating means along the surface of a plate-shaped deflector, wherein the at least one deflecting element is partially designed as a plate-shaped deflector which downstream of the region of action of the separating means forms a closed surface which extends in the axial direction beyond the at least two webs.

All the strips produced in the active region of the separating means are guided on the surface of the plate-like deflector. Thus, a very reliable method for dividing the open width can advantageously be provided.

Furthermore, the same or similar advantages as already mentioned in connection with the device also apply to the method.

According to one advantageous embodiment, the present particles are removed from the grooves of the first roller by the prongs of the first scraper engaging in the grooves of the first roller, and the present particles are removed from the grooves of the second roller by the prongs of the second scraper engaging in the grooves of the second roller, wherein the particles removed from the grooves are sucked out.

According to a further advantageous embodiment, it is provided that directly adjacent strips are separated from one another in the region of action along a predetermined separation line by: stretching the open width transversely to the separation line so vigorously that the open width tears along the separation line.

Furthermore, the method is improved in particular by: the first and/or second roll is configured as an intermittent roll, wherein all the blades of the intermittent roll each comprise at least one void interrupting the cutting edge of the blade, wherein the void in the blades of the intermittent roll is arranged along a spiral and this spiral is in a cylindrical circumferential surface being braced by the cutting edge of the blade, and the axis of the spiral coincides with the axis of rotation of the intermittent roll, and wherein the open width is divided into strips connected to each other by transverse parting strips, which strips are in the void of the blade during the division.

Further features of the invention can be seen from the description of an embodiment of the invention in conjunction with the claims and the drawings. The embodiments according to the invention can implement individual features or a combination of features.

Drawings

Without limiting the general inventive concept, the invention is described below with reference to the accompanying drawings by way of example, wherein reference is explicitly made to the accompanying drawings with regard to all details according to the invention which are not explained in detail in the description. Wherein:

figure 1 shows in a schematically simplified illustration an apparatus for manufacturing strips from a web material,

fig. 2 shows a schematic, simplified detail view of a roller of a separating device of a device for separating a flat web of web material, which detail view is shown in the region of action of the two rollers and in a section in which the axes of rotation of the rollers are located,

figure 3 shows a schematic simplified perspective view of the separating mechanism together with the deflecting mechanism and the scraping mechanism with suction,

fig. 4 shows a schematic, simplified, perspective, detail view of the rollers of the separating mechanism together with the deflecting mechanism, which detail view is shown in the region of action of the two rollers,

figure 5 shows a schematic simplified top view of a deflecting element of the deflecting mechanism,

fig. 6 shows a schematic, simplified perspective detail view of an integrally formed deflection element in the operating position, wherein the opposite roller interacting with the roller is not shown,

figure 7 shows a schematic simplified cross-section of two rollers of the separating means including a deflection means in a plane perpendicular to the axial direction,

figure 8 shows a schematic simplified perspective detail view of a roller of the separating mechanism including a further deflecting mechanism,

figure 9 shows a schematic simplified perspective view of one of the two rollers of the separating mechanism together with the other deflecting mechanism,

figure 10 shows a representation in cross-section of the roll known from figure 9 in a plane perpendicular to the axial direction including a deflection mechanism,

figure 11 shows a further schematic simplified perspective detail view of the rollers of the separating mechanism together with a further deflecting mechanism,

FIG. 12 shows a further schematic simplified sectional view of the two rollers of the separating means in a plane perpendicular to the axial direction, including a further deflection means, and

fig. 13 shows a further schematic, simplified detail view of the rollers of the separating device, which is shown in the region of action of the two rollers and in the section of the rotational axes of the rollers, wherein a deflecting device with webs which are T-shaped in cross section is additionally shown.

In the figures, identical or similar elements and/or components are provided with the same reference symbols, respectively, so that a repeated description is not provided accordingly.

Features identified as "particularly" or "preferred" within the scope of the invention should be taken to mean optional features.

Detailed Description

Fig. 1 shows a schematic and simplified illustration of a device 2 for producing a rod 4 from a web material, which is unwound as a flat web 6, for example from a reel 8, for which purpose an unwinding unit 10 is provided, it being likewise provided that the flat web 6 is conveyed in another manner, the web material of the flat web 6 being, for example, reconstituted tobacco material, P L a film or paper.

The open width 6 is fed to a device 11 comprised by the apparatus 2 for dividing the open width 6. The device 11 for dividing the open width 6 comprises a separating mechanism 12 and a deflecting mechanism 13. The separating device 12 is designed to divide the open width 6 into a plurality of strips 14. The strips 14 extend in a strip plane, which in the illustration of fig. 1 is perpendicular to the plane of the paper. The strip 14 is guided out of the separating device 12 by a deflecting device 13. Fig. 1 shows a schematic top view of a plurality of produced strips 14 as a detail view, which is turned 90 ° out of the plane of the paper for the sake of clarity. The strips 14 running substantially parallel to one another are conveyed, for example, by conveying rollers 16 in the direction of a feed hopper 18 of a strip-forming unit 20. Instead of the transport rollers 16, it is also possible to provide smooth, planar guide means, for example a plate or the like, onto which the strips 14 are drawn and/or moved. Furthermore, it is provided that the device 11 is not so configured, in the case of a device different from the illustration in fig. 1, that the open width 6 is processed in the horizontal direction. The open width can be diverted or can also be conveyed or subjected to one or more processing steps in a direction deviating from the horizontal. However, it has proven advantageous that the divided strips 14 are not diverted until they reach the feed hopper of the strip-forming unit 20. The strip forming unit 20 is part of the apparatus 2 for manufacturing the strip 4. In which the strip 4 is formed by a number of strips 14. The strip formation takes place, for example, in a gauge channel 22, which is only schematically depicted. After the strip is formed, the strip 4 can be sized and cut into individual rod-shaped articles 24 having a desired length.

The separating means 12 of the device 11 for dividing the open width 6 comprise a first roller 26 and a second roller 28 co-operating with the first roller. The two

rollers

26, 28 are not in mechanical contact with each other. The first roller 26 rotates about a first axis of rotation 27 and the second roller 28 rotates about a second axis of rotation 29.

Fig. 2 shows a schematic, simplified detail view of the two

rollers

26, 28 of the separating device 12 in the region of action of the two

rollers

26, 28. Fig. 2 is a representation in a section in which the axes of

rotation

27, 29 of the

rollers

26, 28 lie. The axes of

rotation

27, 29 of the

rollers

26, 28 extend in the axial direction a.

The first roller 26 has a first outer side 30 and the second roller 28 has a second outer side 32. The outer side faces 30, 32 of the

rollers

26, 28 have, in the axial direction a, circumferential grooves 34 and blades 36 which are closed alternately in the circumferential direction. For reasons of clarity, only some of the slots 34 and blades 36 are provided with reference numerals. In the illustrated active region of the two

rollers

26, 28, the blade 36 of the first roller 26 engages in the groove 34 of the second roller 28, and the blade 36 of the second roller 28 engages in the groove 34 of the first roller 26. When the open width 6 is introduced into the region of action between the two

rollers

26, 28, the open width 6 is partially and transversely overstretched along a separating plane T shown in dashed lines to such an extent that the open width 6 tears in the separating plane T. In the illustration of fig. 2, the separating plane T is perpendicular to the web plane E, in which the open width 6 is fed to the separating device 12.

The blades 36 of the

rollers

26, 28 each comprise an upper side 38, which is part of the

outer side

30, 32 of the associated

roller

26, 28. The grooves 34 each comprise a base 40, which is likewise part of the

outer side

30, 32 of the associated

roller

26, 28. The blade 36 and the groove 34, more precisely the upper side 38 of the blade 36 and the bottom 40 of the adjacent groove 34, are connected to each other by

side edges

42, 44, respectively. Depending on whether the slot 34 or the blade 36 is assigned to the first roller 26 or to the second roller 28, these side edges are referred to as first side edges 42 if the first roller 26 is concerned and second side edges 44 if the second roller 28 is concerned. The sides extend radially along 42, 44, i.e. along a radial direction R perpendicular to the axial direction a. The radial direction R extends in the direction of the radius of the

respective roller

26, 28. The open width 6 is divided into strips 14 along separation lines extending between a first side edge 42 of the first roller 26 and a second side edge 44 of the second roller 28, respectively.

The separating device 12 is designed to divide the open width 6 with a predetermined material thickness. The separating device 12 is designed such that an axial gap dimension 46 is provided between the side edges 42, 44 of the

opposite rollers

26, 28, i.e. between the first side edge 42 and the second side edge 44, which is 0.5 to 2 times, in particular 0.6 to one time, the value of the predetermined material thickness of the open width 6. The distance D between the upper side 38 of the blade 36 of the first roller 26 and the upper side 38 of the blade 36 of the second roller 28, measured in the radial direction R of the

rollers

26, 28, is, for example, one to five times the value of the predefined material thickness of the open width 6. The local over-stretching of the open width 6 along the separation line brings the individual strips 14, in which again only some of the strips 14 are provided with reference numerals for reasons of clarity, into the grooves 34 of the

rollers

26, 28 in a state separated from one another. The strips 14 have an open structure at their edges 48, since they are not separated by cutting, but are torn off in a defined manner by overstretching.

As a result of the division of the open width 6 into individual strips 14, the following can occur: the individual strips 14 adhere in the groove base of the groove 34 in the

respective roller

26, 28, i.e. on or near the bottom 40 of the groove 34 and are therefore difficult to remove from the groove 34 at the end of the region of action between the two

rollers

26, 28. For this reason, the separating means 12 comprise a deflecting means 13, which deflecting means 13 comprises at least one deflecting element, the parting strips 50 of which engage into the grooves 34 of the first roller 26 and the second roller 28. The division bars 50 extend between the bottom 40 of the groove 34 and the respective strip 14. The strip 14 is guided out of the groove 34 at the end of the region of action by the dividing strip 50, i.e. from the bottom 40 of the groove 34 in the direction of the upper side 38 of the blade 36. From there the strip 14 is drawn out of the cylindrical outer side of the

rollers

26, 28 defined by the outer circumference of the blade 36. The strip 14 further reaches a plate-like deflector of the deflecting element, which is arranged downstream of the region of action and is configured as a closed surface.

Fig. 3 shows the separating mechanism 12 in a schematically simplified perspective view, which comprises a first roller 26 and a second roller 28. For the sake of simplicity, the open width 6 and the band 14 produced from the open width by means of the separating means 12 are not shown. The open width 6 is fed from the right side from the inlet region 60 to the separating means 12. In the region of action 52, the

rollers

26, 28 engage one another and the open width 6 is divided into individual strips 14. The deflection mechanism 13 comprises a first deflection element 54 and a second deflection element 56. The deflecting

elements

54, 56 are partially designed as plate-like deflectors.

In the exemplary embodiment shown in fig. 3, the

deflection elements

54, 56 are arranged symmetrically with respect to the dividing plane AT. The position of the deflecting element is outlined in fig. 3 with a dashed line. Furthermore, the deflecting

elements

54, 56 are formed symmetrically with respect to the dividing plane AT in the inlet region 60 and in the outlet region 58, i.e. upstream of the active region 52 and downstream of the active region 52. In other words, the deflecting

elements

54, 56 are of the same type in the inlet region 60 and in the outlet region 58.

In fig. 3, the region of the second deflecting element 56 which is designed as a plate-like deflector 62 is visible in the outlet region 58. This plate-like deflector 62 is designed as a closed surface and connects the webs 50 of the second deflecting element 56, which webs are not visible in fig. 3, to one another.

The deflecting

elements

54, 56 are designed, for example, to apply a spring force acting in the direction of the dividing plane AT to the flat web 6 or the produced strip 14. For this purpose, the

deflection elements

54, 56 are designed, for example, as spring-elastic elements. It is also provided that the bearing or suspension 63 of the

deflection element

54, 56 is designed as a spring seat. The first deflection element 54 is thus spring-loaded in the direction of the second roller 28 or is supported in this direction. Accordingly, the second deflecting element 56 exerts a spring force in the direction of the first roller 26 or is supported in this direction in a spring-loaded manner. The spring force can be adjusted accordingly.

According to another embodiment, said deflecting

elements

54, 56 are mechanically coupled with at least one exciter. The exciter is designed to put the

deflection elements

54, 56 into periodic or aperiodic oscillation. For example, the at least one suspension 63 of the at least one

deflection element

54, 56 is designed as an exciter, for example as a piezo actuator, an eccentric, an ultrasonic generator or as a mechanical element which rotates in response to an imbalance. By placing the deflecting

elements

54, 56 in vibration in this way, mechanical jamming (jamming) of the

rollers

26, 28 by the strip 14 is prevented or eliminated.

Furthermore, the separating mechanism 12 is provided with a scraping mechanism 64. The scraping mechanism comprises a first comb-shaped scraper 66 provided with a plurality of tines, wherein the tines of said first scraper 66 engage in the grooves 34 of the first roller 26 and for this purpose serve to clean the first roller 26. Furthermore, the scraping mechanism 64 comprises a second scraper 68, which is likewise provided with tips, wherein the tips of the second scraper 68 engage in the grooves 34 of the second roller 28 for cleaning this roller 28. Furthermore, the scraping mechanism 64 comprises a suction mechanism 70, with which suction mechanism 70 particles removed from the

rollers

26, 28 by the

scrapers

66, 68 are sucked out. In the mechanism shown in fig. 3, the suction mechanisms 70 each comprise a hood 72 in which a suction channel 74 is present. The hood 72 extends as far as the outer side of the

rollers

26, 28, so that the particles removed by the

scrapers

66, 68 are received into the inner space of the hood 72 and are removed by the suction channel 74.

The first cutting roller 26 or the second cutting roller 28 or both cutting

rollers

26, 28, i.e. the first cutting roller 26 and the second cutting roller 28, are constructed, for example, as intermittent rollers. The configuration of the separating means 12 with at least one intermittent roller ensures that the strips 14 are connected to the transverse partitions in pairs with each other. For intermittent rolls, all of the blades 36 of the

intermittent rolls

26, 28 are provided with a gap that interrupts the cutting edge of the blade 36. The voids in the blades 36 of such

intermittent rollers

26, 28 are arranged along a spiral. The helix is in a cylindrical periphery that is distracted by the cutting edge of the blade 36. The axis of this spiral coincides with the respective axes of

rotation

27, 29 of the

intermittent rollers

26, 28.

Fig. 4 shows the first roller 26 and the second roller 28 in a schematically simplified perspective detail view. The outer blade 36 of the first roller 26 is seen from the front in the figure. In the region of action 52, this blade 36 intersects the blade 36 of the second roller 28. The blade 36 thus engages in the groove 34 of the

opposite roller

26, 28. The division bar 50 of the second deflection element 56 extends through this slot 34. The opposite first deflection element 54 likewise has spacers 50, only one single spacer being partially visible in these spacers 50. These bars extend through the grooves 34 of the first roller 26. The open width 6 is fed to the region of action 52 from the right between a first deflecting element 54 and a second deflecting element 56. In the region of action 52, the open width 6 is divided into individual strips 14, which are drawn off from the

rollers

26, 28 on the upper side 76 of the separating strip 50 facing the respectively

opposite roller

26, 28. The strips 14 then pass onto a plate-like deflector 62, which is provided with reference numerals in fig. 4 for the second deflecting element 56. The strip 14 is guided on the upper side of the deflector 62 and is supplied to further processing steps. The strip 14 is also drawn from the first roller 26 by the first deflecting element 54 in the same manner as described for the second deflecting element 56. In the outlet region 58, the strip 14 is guided between the two deflecting

elements

54, 56, more precisely between the plate-like deflectors 62 of the

respective deflecting element

54, 56.

Fig. 5 shows a schematic and simplified plan view of a deflection element of the deflection mechanism 13, an exemplary first deflection element 54. The deflecting element 54 comprises a plurality of division bars 50. Between the webs 50 there is a free space or gap through which the blades 36 of the first roller 26 pass in the assembled state of the disposable. The division bar 50 is transformed into a plate-like deflector 62. The extent 78 of the plate-like deflector 62 in the axial direction a is greater than the dimension of the region of action 52 in this direction. The dimension of the active area 52 in the axial direction a corresponds to the spacing between the outer blades 36 of the

rollers

26, 28. Since the blade 36 of the roller 26 passes through the gap between the parting strips 50, this is the spacing between the outer edges of the outermost gaps, measured in the axial direction a.

The deflection element 54 is formed, for example, in one piece. For this purpose, for example, the plates are provided with slits, so that the division bars 50 are produced. The deflecting element 54 is thus for example completely flat.

Fig. 6 shows a schematic, simplified perspective detail view of the integrally formed deflection element 54 in the operating position. The opposite roller 28, which co-operates with the roller 26 shown, is not shown. The shown deflection element is merely exemplary and should again be the first deflection element 54. The blades 36 of the first roller 26 extend in the grooves between the division bars 50. The division bar 50 is transformed into a plate-like deflector 62. The plate-like deflector 62 is connected downstream to the division bars 50 and connects all division bars 50 to one another. Upstream, the parting strips 50 are likewise connected to one another in the illustrated embodiment by means of a further plate-shaped deflector 80.

Fig. 7 shows the first roller 26 and the second roller 28 in a schematically simplified sectional view, which is in a plane perpendicular to the axial direction a. Also shown are a first deflection element 54 and a second deflection element 56, which together form the deflection mechanism 13. The two deflecting

elements

54, 56 are arranged on opposite sides of the dividing plane AT. The parting plane AT is arranged such that it is perpendicular to the shortest connecting line between the first axis of rotation 27 of the first roller 26 and the second axis of rotation 29 of the second roller 28. In this case, the dividing plane AT divides the shortest connecting line exactly in the middle. The parting plane AT is thus as far away from the first and second axes of

rotation

27, 29. This applies on the premise that: the two

rollers

26, 28 have the same large radius. The two deflecting

elements

54, 56 are arranged, for example, mirror-symmetrically with respect to the dividing plane AT.

Fig. 8 shows the first roller 26 and the second roller 28 again in a schematic, simplified perspective detail view, wherein the second roller 28 is exemplarily provided with a second deflection element 56 according to a further exemplary embodiment. The webs 50 are received in a common holder 82 on the front side in fig. 8. In particular, it is provided that the dividing strip 50 is not formed integrally or in one piece with this carrier 82. Furthermore, the separating webs 50 each have an S-shaped offset, so that their upper side 76 partially reduces the distance from the opposite roller, in this case from the first roller 26. The S-shaped runout is directed in the direction of this first roller 26.

Fig. 9 shows a further schematic, simplified perspective view, in which a second roller 28 and a second deflecting element 56 according to a further embodiment are shown. The deflection element 56 has a first S-shaped deflection in the first region 84 and a second S-shaped deflection in the second region 86.

Fig. 10 shows in a sectional view, which is shown in a plane perpendicular to the axial direction a, that the roller 28 known from fig. 9 comprises a second deflecting element 56. The first and

second regions

84, 86 are again visible, in which regions an S-shaped deflection in the opposite direction is present in the deflection element 56.

Fig. 11 shows in a further schematic and simplified perspective view the

rollers

26, 28 of the separating mechanism 13 together with the

respective deflecting elements

54, 56 according to a further embodiment. The

deflection elements

54, 56 are designed in such a way that they each have two S-shaped deflections pointing in opposite directions. These S-shaped deflections are in the first and

second regions

84, 86. In addition, a gap exists in the third region 88, in which the

deflectors

54, 56 are again moved away from the respective opposing

roller

26, 28.

Fig. 12 shows a further schematic, simplified sectional view in a plane perpendicular to the axial direction a of the two

rollers

26, 28 of the separating means 12. The illustrated separation mechanism 12 includes a deflection mechanism 13 that includes a first deflection element 54 and a second deflection element 56. In contrast to the deflection mechanism 13 described in the preceding exemplary embodiment, the webs 50 of the

deflection elements

54, 56 shown in fig. 12 are each held on one side on a plate-shaped deflector 62 and extend from there into the groove 34 of the first roller 26 or into the groove 34 of the second roller 28. The division bar 50 can be seen completely in the first deflection element 54, since the sectional view in fig. 12 frees up the view of the groove 34 of the first roller 26. This division bar 50 extends from the deflector 62 in the direction of its free end 90 into the interior of the groove 34. The webs 50 of the second deflecting element 56 are only partially visible, since the associated grooves of the second roller 28 are not shown in the sectional view of fig. 12.

The exit area between the deflecting

elements

54, 56 is funnel-shaped. The plate-like deflector 62 of the second deflector element 56 is in particular planar and is formed, for example, parallel to a dividing plane AT indicated by a dashed line. The individual strips (not shown) can thus be drawn out of the region of action between the

rollers

26, 28 via the webs 50 and the plate-like deflector 62 of the second deflecting element 56.

Furthermore, fig. 12 shows a first scraper 66 of the scraping mechanism 64, which has already been explained above, as an example at the first roller 26.

Fig. 13 shows the

rollers

26, 28 of the separating device 12 in a further, schematically simplified detail. The area of action between the two

rollers

26, 28 is shown in the section in which the axes of rotation of the

rollers

26, 28 lie. This illustration is similar to that in fig. 2. The first roller 26 and the second roller 28 are only partially shown. The blade 36 of the first roller 26 fits into the groove 34 of the second roller 28. Conversely, the blade 36 of the second roller 28 fits into the groove 34 of the first roller 26. The situation in which the webs 50 of the first deflection element 54 are arranged in the grooves 34 of the first roller 26 and in the grooves 34 of the second roller 28 is likewise shown in cross section, respectively. The parting beads 50 of the second deflection element 56 are arranged in the grooves 34 of the second roller 28 and are shown in cross section. The division bar 50 is T-shaped in cross section. The flat upper side 92 of the division bar 50 faces the dividing plane AT. On this flat upper side 92, a strip 14, not shown in fig. 13, is drawn off from the region of action between the first and

second rollers

26, 28. The division bar 50 fills the groove 34 only approximately in width in the head region 94. In the trunk region 96, which is formed to be significantly narrower, the width of the separating strip 50 is significantly smaller. In this way, it is possible for impurities to be transported between the groove flank 98 and the narrow trunk region 96 in the direction of the bottom 40 of the groove 34, where they can be removed by means of the scraping mechanism 64, which is not shown in fig. 13.

All the mentioned features, including also features which can be taken from the drawings alone and in combination with other features disclosed individually, are to be considered as features which are essential to the invention. The embodiments according to the invention can be realized by individual features or combinations of features.

List of reference numerals

Apparatus for producing strips

4 strips

6 open width

8 reel

10 unwinding unit

11 device for dividing open width

12 separating mechanism

13 deflection mechanism

14 strips

16 conveyor roller

18 feeding funnel

20 strip forming units

22 gauge channel

24 articles

26 first roll

27 first axis of rotation

28 second roll

29 second axis of rotation

30 first outer side

32 second outer side surface

34 groove

36 blade

38 upper side

40 bottom

42 first side edge

44 second side edge

46 axial gap size

48 edge

50 parting bead

52 region of action

54 first deflection element

56 second deflection element

58 outlet region

60 inlet area

62 plate-shaped deflector

63 suspension

64 scraping mechanism

66 first scraper

68 second scraper

70 suction mechanism

72 cover

74 suction channel

76 upper side

78 expansion

80 additional deflector

82 support

84 first region

86 second region

88 a third region

90 free end

92 flat upper surface

94 head region

96 torso region

98 groove side edge

Axial direction A

AT division plane

E paper plane

R radial direction

T separating surface

Claims

1. Device (11) for dividing a flat web (6) of web material into a plurality of strips (14), comprising a separating means (12) and a deflecting means (13), wherein the separating means (12) comprises a first roller and a second roller (26, 28) interacting with the first roller, and wherein the outer sides (30, 32) of the rollers (26, 28) alternately have, in the axial direction (A), a groove (34) and a blade (36) which are closed around in the circumferential direction of the respective roller (26, 28), and in the active region the blade (36) of the first roller (26) engages in the groove (34) of the second roller (28) and the blade (36) of the second roller (28) engages in the groove (34) of the first roller (26), and the separating means (12) is set up for dividing the flat web (6) into a plurality of adjacent strips (14), and wherein the deflection mechanism (13) comprises at least one deflection element, the webs (50) of which engage in the grooves (34) of the first or second roller (26, 28), characterized in that the at least one deflection element (54, 56) is partially designed as a plate-like deflector (62) which forms a closed surface downstream of the region of action of the separating mechanism (12), said closed surface extending in the axial direction (A) over at least two webs (50).

2. Device (11) according to claim 1, characterized in that the parting beads (50) of at least one deflecting element (54, 56) of the deflecting mechanism (13) are held on one side on the plate-like deflector (62) and extend from the deflector (62) in the direction of their respective free end (90) into the groove (34) of the first roller (26) or second roller (28).

3. Device (11) according to claim 1 or 2, characterized in that at least one division bar (50), in particular all division bars (50), of the at least one deflection element (54, 56) has a T-shaped cross section.

4. Device (11) according to claim 1, characterized in that the deflection mechanism (13) comprises a first and a second deflection element (54, 56) which are arranged on opposite sides of a dividing plane (AT), wherein the shortest connecting line between the first axis of rotation (27) of the first roller (26) and the second axis of rotation (29) of the second roller (28) is perpendicular to the dividing plane (AT), wherein the two deflection elements (54, 56) are arranged on both sides of the dividing plane (AT), in particular mirror-symmetrically with respect to the dividing plane (AT).

5. Device (11) according to claim 1, characterized in that the AT least one deflection element (54, 56) is set up for applying a spring force acting in the direction of a dividing plane (AT) to the open width (6) or the strip (14), wherein a shortest connecting line between the first axis of rotation (27) of the first roller (26) and the second axis of rotation (29) of the second roller (28) is perpendicular to the dividing plane (AT), wherein in particular the AT least one deflection element (54, 56) is configured as a spring-elastic element and/or is supported in a spring-loaded manner.

6. Device (11) according to claim 1, characterized in that said at least one deflecting element (54, 56) has at least one S-shaped deflection, viewed in a plane perpendicular to said axial direction (a).

7. Device (11) according to claim 1, characterized in that a scraping mechanism (64) is furthermore comprised, which comprises a first and/or a second comb-shaped scraper (66, 68) with a plurality of tines, wherein the tines of the first scraper (66) engage into the grooves (34) of the first roller (26) for cleaning the first roller (26) and the tines of the second scraper (68) engage into the grooves (34) of the second roller (28) for cleaning the second roller (28), wherein the scraping mechanism (64) comprises a suction mechanism (70) for sucking out particles removed from the rollers (26, 28) by the scrapers (66, 68).

8. Device (11) according to claim 1, characterized in that said at least one deflecting element (54, 56) is mechanically coupled with at least one exciter, said exciter being set up for putting said deflecting element (54, 56) in periodic or aperiodic vibration.

9. The device (11) as claimed in claim 1, wherein the separating means (12) are set up for separating directly adjacent strips (14) from one another in the region of action (52) along a predetermined separation line (T) by: stretching the open width (6) so strongly transversely to the separation line (T) that the open width tears along the separation line (T).

10. The device (11) according to claim 1, characterized in that the first and/or second roller (26, 28) is configured as an intermittent roller, wherein all blades (36) of the intermittent roller comprise at least one void, respectively, interrupting the cutting edge of the blade (36), wherein the voids in the blades (36) of the intermittent roller (26, 28) are arranged along a spiral and the spiral is in a cylindrical circumference that is backed off by the cutting edge of the blade (36), and the axis of the spiral coincides with the rotational axis (27, 29) of the intermittent roller (26, 28).

11. Apparatus (2) for manufacturing a rod (4) of the tobacco processing industry, comprising a device (11) according to claim 1 and a rod-forming unit (20) which is set up for forming a rod (4) from a multitude of strips (14).

12. Method for dividing a flat web (6) of web material (6) into a plurality of strips (14), wherein the flat web (6) is divided into a plurality of adjacent strips (14) by means of a separating device (12) comprising a first roll and a second roll (26, 28) interacting with the first roll, wherein the outer side faces (30, 32) of the rolls (26, 28) alternately have, in the axial direction (A), a circumferential groove (34) and a blade (36) which are closed in the circumferential direction of the respective roll (26, 28), and in an active region (52) the blade (36) of the first roll (26) engages in the groove (34) of the second roll (28) and the blade (36) of the second roll (28) engages in the groove (34) of the first roll (26), wherein a deflecting device (13) comprising at least one deflecting element (54, 56) is used for engaging a strip (50) of the deflecting element in the first roll or in the second roll (26), wherein the strip (50) is engaged in the first roll or in the second roll, respectively, and wherein the strip ( -removing the strip (14) from the grooves (34) of the first or second roller (26, 28) in the grooves (34) of the two rollers (26, 28) by means of a deflecting mechanism (13), characterized in that the strip (14) is guided along the surface of a plate-like deflector (62) downstream of the region of action (52) of the separating mechanism (12), wherein the at least one deflecting element (54, 56) is partially configured as a plate-like deflector (62) which constitutes a closed surface downstream of the region of action (52) of the separating mechanism (12), said closed surface extending beyond at least two parting strips (50) in the axial direction (a).

13. Method according to claim 12, characterized in that the present particles are removed from the grooves (34) of the first roll (26) by the prongs of a first scraper (66) which engage in the grooves (34) of the first roll (26), and the present particles are removed from the grooves (34) of the second roll (28) by the prongs of a second scraper (68) which engage in the grooves (34) of the second roll (28), wherein the particles removed from the grooves (34) are sucked out.

14. Method according to claim 12 or 13, characterized in that directly adjacent strips (14) are separated from each other in the active region (52) along a predetermined separation line (T) by: stretching the open width (6) so strongly transversely to the separation line (T) that the open width tears along the separation line (T).

15. The method according to claim 12, wherein the first and/or second roll (26, 28) is configured as an intermittent roll, wherein all blades (36) of the intermittent roll comprise at least one void, respectively, interrupting the cutting edge of the blade (36), wherein the voids in the blades (36) of the intermittent roll are arranged along a spiral and the spiral is in a cylindrical circumferential surface that is braced by the cutting edge of the blade (36), and the axis of the spiral coincides with the rotational axis (27, 29) of the intermittent roll, and wherein the flat web (6) is divided into strips (14) that are connected to each other by transverse division bars, which strips are in the voids of the blade (36) during the division.