EP3045055B1 - Cutting of a paper coating tape - Google Patents

Description

The invention relates to a knife for a cutting roller of a covering device of a machine of the tobacco-processing industry, in particular a filter attachment machine, for cutting an endless or quasi-endless web of material web strips in fin strip length.

The invention further relates to a device for cutting a web strip of the tobacco processing industry, in particular a tipping paper strip, in web strip sections, in particular tipping paper strip sections, with a cutting device for cutting the web strip and with a feed device for feeding the web strip to the cutting device and a machine of the tobacco processing industry, in particular filter attachment machine.

Moreover, the invention relates to a method for cutting a Material web strip of the tobacco-processing industry, in particular tipping paper strip, in web strip sections, in particular tipping paper strip sections.

In Filteransetzmaschinen is inserted between cut and longitudinally axially spaced tobacco rods each a filter piece or mouthpiece of double length, then a glued pad paper leaflet is attached to the assembled cigarette-mouthpiece-cigarette group.

In DE-A-39 18 137 For example, a tipping paper apparatus of a filter attachment machine is described. Here, the glued tiling paper is fed as an endless tipping paper strip and cut by means of a cutting device in individual leaflets or tipping paper leaflets.

The cutting device consists of a cutterhead with outwardly directed knives and a suction drum with recesses whose leading edge in the direction of rotation is designed as a cutting edge. Between the grooves, the suction drum with suction air acted upon surfaces on which the tipping paper strip and the tipping paper leaflets are held or guided. The knives of the rotating knife drum engage in the grooves of the counter-rotating tamping paper roll, wherein the tipping paper strip is cut in each case between a knife of the cutting drum and a cutting edge of the suction drum.

At the in DE-A-39 18 137 As described cutting process is a pulling separation cut or a shear cut for the separation of the pad sheets from the covering material strips performed. In this case, slide the cutting edges of the cutting blade and the cutting edges of the suction drum under punctiform mutual contact together along. If no synchronism between the tipping paper strip and the cutting blade is carried out during the executed shear cut, this leads to an oblique cut in the separated tipping flakes.

Furthermore, in GB-A-2 134 432 discloses a device for cutting cork paper for the production of filter cigarettes, wherein the device comprises a roller with a knife and a counter-roller. The first roller, on which the knife is arranged, has flanges at its opposite ends, between which the knife extends.

In addition, according to the prior art, a gap between the tipping paper leaflets is needed for the cutting process. In this case, an oscillator is used in the feed device, so that a higher speed of the suction roller to the speed of the lining material strip takes place.

Based on this state of the art, the object of the invention is to improve the cutting process on a cutting device for separating covering sheets from a tipping paper strip in a filter attachment machine of the tobacco processing industry, so that even at higher conveying speeds of the tipping paper strip high cut quality in the cut tipping paper strip sections is achieved.

This object is achieved by a knife for a cutting roller of a padding device of a machine of the tobacco-processing industry, in particular a filter attachment machine, for cutting an endless or quasi-endless web of material web strip sections of finite length, which further develops in that the knife has a cutting region with a, in particular straight, cutting edge for cutting the material web strip and two cutting guide flanks, wherein the cutting region is formed between the two cutting guide flanks protruding from the cutting region, so that the cutting edge is set back relative to the laterally adjacent cutting guide flanks.

The invention is based on the idea that a cutting roller of a padding device is formed with one or more knives, whereby the cutting guide edges provided as guide surfaces during cutting of webbing strips in material web strip sections or covering paper strip sections during the cutting process in cooperation with a provided on a suction roll as a counter-rotating cutting edge first whereby the cutting guide edges of the cutting roller contacting the cutting edge of the backing roll slide along this cutting edge of, for example, a knife of the suction roll (counter roll) when immersed in a groove of the backing roll so that the cutting roll and the suction roll cooperating with the cutting roll rotate the cutting area of the knife body of the knife and the cutting edge of the suction roll are approximated to each other.

It is preferably provided that the cutting area of the knife or the knife body of the cutting roller are deflected to compensate existing tolerances between the cutting area of the cutting roller and the blade of the suction roller. In the context of the invention, the cutting roller is also referred to as a knife roller.

During the cutting process of the material strip, a full-edge cut is performed here by the approach of the cutting region of the knife body of the knife and the cutting edge of the suction roll, whereby the cutting time can be shortened or shortened in the case of a covering device. Due to the contacting contact between the cutting guide flanks of the knife body of the knife with the cutting edge of the suction roll (counter roll), the knife body is deflected before the start of cut, preferably resilient, with rotation of the cutting roll and the suction roll the cutting area of the knife or the knife body and the cutting edge of the suction roll are approximated to each other. Due to the sliding contact between the cutting guide flanks of the knife body and the cutting edge of the suction roll possibly possible misalignments of the knife body or the cutting area are compensated to the axis of rotation of the cutting roller and possible inaccuracies in the angle from the cutting edge of the cutting area to the cutting edge of the suction roll.

Since according to the invention in the cutting process, the cutting edge of the cutting area and the knife body and the cutting edge of the suction roll or counter roll are formed axially parallel to the respective axes of rotation of the cutting roll or knife roll and the axis of rotation of the suction roll, in the executed according to the invention full-edge cut the web strip simultaneously cut across the entire width of the material web strip.

For this purpose, it is provided in a further development of the knife, that in each case a recess or a recess in the knife body is provided between the laterally formed cutting guide flanks and the cutting edge of the cutting region provided therebetween. In this case, for example, the recess is arc-shaped or U-shaped.

Furthermore, an embodiment of the knife for the cutting roller is characterized in that the knife is integrally formed. In particular, the knife body of the knife is integrally formed with the cutting area and with the cutting guide flanks.

Preferably, the cutting edge of the cutting area of the knife body formed as a rectangular cross-sectional profile or as a V-shaped cross-sectional profile. The cutting edge is in this case in particular formed in a straight line over the entire region, wherein the length of the cutting edge is greater than the width of the material web strip to be cut.

Preferably, the cutting guide flanks of the knife each have an outwardly tapered cross-sectional profile, whereby the dipping of the cutting guide flanks is facilitated in the grooves of the mating roll.

A particular embodiment is that the cutting guide edges are the same size. In addition, in particular the knife body or the knife is made of steel.

In addition, the object is achieved by a device for cutting a web strip of tobacco processing industry, in particular a tipping paper strip, in web strip sections, in particular tipping paper strip sections, with a cutting device for cutting the web strip and with a feeding device for feeding the web strip to the cutting device, wherein the cutting device a Cutting roller and a cooperating with the cutting roller mating roll, in particular suction roll, identifies, wherein between the cutting roll and the backing roll of the web strip is guided and wherein the cutting roll is formed in the circumferential direction with a plurality of knives described above.

Here, the cutting roller and the counter-roller or suction roller are part of a padding device of a machine of the tobacco-processing industry, in particular filter attachment machine.

For this purpose, the device is provided in a development that the counter roller in the circumferential direction has grooves for receiving the cutting guide edges of the knife, with simultaneous rotation of the counter roll and the cutting roller dipping the cutting guide flanks in a groove of the backing roll and can be brought into contact with a groove flank of the groove or brought and then the cutting region of the knife is insertable or inserted into the groove of the counter roll. In this case, the cutting edge of the cutting area for cutting the web strip is immersed in the groove of the backing roll during the cutting process.

In addition, it is advantageously provided in the device that the cutting edges of the blades are each aligned transversely to the direction of rotation of the cutting roller and the cutting edges are arranged parallel to the axis of rotation of the cutting roller.

In particular, the cutting device is designed to perform a full-edged cut when cutting the material web strip in web strip sections.

In this case, preferably, the counter-roller axially parallel aligned grooves each acting as a cutting edge groove edges in the circumferential direction, wherein the front in the circumferential direction groove flank of the grooves is provided as the cutting edge, in particular the cutting edge is formed by a knife arranged in the groove.

In particular, the process speed at the device is increased by the fact that the, preferably oscillator-free or eccentric-free, feeding device for the material web strip is set up is to supply the web strip at a constant conveying speed of the cutter.

Furthermore, the object is achieved by a machine of the tobacco processing industry, in particular filter attachment machine, which is formed with a device described above for cutting a material web strip. To avoid repetition, reference is expressly made to the above statements.

In addition, the object is achieved by a method for cutting a material web strip of the tobacco-processing industry, in particular tipping paper strip, in web strip sections, in particular tipping paper strip sections, using a device described above for cutting a material web strip in web strip sections. Reference is also made to the above explanations.

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

Fig. 1

schematisch eine Ausführungsform einer Belageinrichtung einer Filteransetzmaschine in einer schematischen Seitenansicht;

Fig. 2

schematisch eine vergrößerte Darstellung der Belagschneideinrichtung aus Fig. 1;

Fig. 3

schematisch eine perspektivische Ansicht der Belagschneideinrichtung ;

Fig. 4

eine schematische Ansicht auf ein erfindungsgemäßes Schneidmesser für die Messertrommel;

Fig. 5a, 5b

schematisch eine Seitenansicht bzw. perspektivische Teilansicht der Belagschneideinrichtung und

Fig. 6

eine schematische Darstellung verschiedener Phasen des Schneidvorgangs.

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

Fig. 1

schematically an embodiment of a padding device a Filteransetzmaschine in a schematic side view;

Fig. 2

schematically an enlarged view of the pad cutting device Fig. 1 ;

Fig. 3

schematically a perspective view of the pad cutting device;

Fig. 4

a schematic view of an inventive cutting blade for the cutterhead;

Fig. 5a, 5b

schematically a side view and partial perspective view of the lining cutting device and

Fig. 6

a schematic representation of various phases of the cutting process.

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 side view of an apparatus 1 for feeding a tipping paper strip 2 in a schematically designated Filteransetzmaschine F. A filter attachment machine of HAUNI Maschinenbau AG, Hamburg, is known under the name MAX. The device 1 will be described below with reference to the path of the tipping paper strip 2.

The tipping paper strip 2 is moved by a supply roll 4 rotating about an axis 5 according to the arrowed direction a pair of withdrawal rollers 6 and 8 deducted. One of the two take-off rolls, here the take-off roll 6, is driven by a drive 11 via a toothed belt 7.

Before the tipping paper strip 2 reaches the take-off rolls 6 and 8, it is conveyed via a deflection roller 12 to a breaker 14. The crusher 14 breaks the paper of the tipping paper strip 2 so that it can later be more easily wrapped around assembled filter-cigarette groups.

Downstream of the take-off rolls 6 and 8, a gluing device 22 for applying glue patterns to the tipping paper strip 2 is provided. The gluing device 22 has a glue nozzle 24. With the help of the glue nozzle 24 glue images are applied to the tipping paper strip 2.

Downstream of the gluing device 22, the tipping paper strip 2 passes via deflection rollers 26, 28 and 29 to a pad cutting device 30 for the periodic separation of pad paper sections from the pad paper strip 2. The pad cutting device 30 is arranged at a fixed path length in the direction of movement 20 of the pad paper strip 2 behind the glue nozzle 24. With always the same length of the tipping paper strip 2 between the glue nozzle 24 and the pad cutting device 30, the generated glue pattern is aligned to the position of the cut during the cut by driving the glue nozzle 24.

The pad cutting device 30 has a knife roller 32 with arranged at its circumference, with respect to the radial slightly angled knives 34, and a counter-rotating, the pad paper strip 2 receiving as a pad paper drum or pad roller trained suction roller 36.

The suction roll 36 has groove-like recesses 38, in which the blades 34 due to the distance of the rollers 32 and 36 to each other with rotation of the two rollers 32 and 36 dive to separate the seated on the circumference of the suction roll 36 tipping paper strip 2. Below the provided on the circumference of the suction roller 36 bearing surfaces 40, the suction roller 36 with a suction device related suction holes 42 for holding the tipping paper strip 2 and the separated tipping paper leaflets 39 on the suction roll 36 on.

According to the invention, in contrast to the prior art between the guide rollers 26 and 28 no oscillator is arranged. Thus, the tipping paper strip 2 is continuously conveyed to the pad cutting device 30 at the constant or uniform conveying speed. The conveying speed of the tipping paper strip 2 is not determined e.g. varies by means of an otherwise provided oscillator or the like.

The Fig. 2 shows schematically in a fragmentary enlarged view of the pad cutting device 30. The tipping paper strip 2 is conveyed to the suction roller 36. The peripheral surface of the suction roll 36 is acted upon in the usual way with suction air, which is supplied via Saugluftbohrungen 42 and 43 and the tipping paper strip 2 holds on the surface of the suction roll 36 and leads. The suction roller 36 has in its peripheral surface to the axis of rotation axially parallel grooves or recesses 38, which is provided in the direction of the front edge 47 as a cutting edge for the tipping paper leaflets 39 separating from the tipping paper strip 2 separating cut.

The knife roller 32 carries at its periphery transversely to the direction of rotation extending blade 34, which dive successively in circulation in the grooves 38 of the suction roller 36. The cutting edges of the knives 34 are aligned parallel to the axis of the knife roll 32, so that the cutting edge of the knife 34 rotates over the entire width or length on a (single) cutting circle, the cut with the immersion of the straight cutting edge in the corresponding groove or Recess 38 of the suction roll 36 begins to execute a full-edge cut and after the dipping of the cutting edge with the severance of the tipping paper strip ends.

The suction roll 36 has arranged in the circumferential direction of the suction roll 36 support body 50, which have on the outside over corresponding bearing surfaces 40 for the tipping paper leaflets 39 and the tipping paper strip 2. Between the support bodies 50, the recesses 38 are formed as an interruption.

Fig. 3 shows in a perspective partial view schematically an embodiment of the pad cutting device 30 with the removal of the tipping paper strip. Here, the knife roller 32 at regular intervals in the circumferential direction, the knife 34 of the invention (see. Fig. 4 ) on. The blades 34 are in this case clamped on the drum body of the knife roller 32, so that the cutting edges of the blades 34 are aligned parallel to the axis of rotation of the knife roller 32. During the cutting process by performing a full-edge cut, the knives 34 dive into the groove-shaped recesses 38 of the suction roll 36 with simultaneous rotation of the knife roll 32 and the suction roll 36.

In the suction roller 36, the groove-shaped recesses 38 are at regular intervals in the circumferential direction on the drum body of the support bodies 50 between the support bodies 50 for the tipping paper Suction roll 36 is arranged. The support bodies 50 in this case have for the support surfaces for a tipping paper strip 2 or for a tipping paper leaflets 39 (not shown here) acted upon by vacuum suction holes to hold cut paper sheets on the outside.

Between the support bodies 50 is provided in the circumferential direction of the drum body of the suction roll 36 each have a recess 38 in which a, in particular one-piece, knife body 52 is arranged. Here, the knife body 52 is clamped by means of a corresponding clamping device (not shown here). In the direction of rotation, the front groove flank of the recesses 38 is formed by the knife body 52 as the cutting edge of the suction roll 36.

In Fig. 4 a view of a cutting blade or knife 34 according to the invention in combination with a knife body 52 of the suction roll 36 is shown. The knife 34 of the knife roller 32 is in this case designed as a knife body, wherein the cutting blade or knife 34 has a cutting area 60 and on both sides two cutting guide flanks 62.1, 62.2. The cutting guide flanks 62.1, 62.2 are each formed with two extensions, so that the cutting region 60 is set back relative to the outer ends of the cutting guide flanks 62.1, 62.2. The cutting area 60 has a straight cutting edge 64 for cutting the tipping paper strip.

Between the lateral ends of the cutting area 60 and the outside cutting guide flanks 62.1, 62.2, an arcuate or U-shaped recess 66 is formed in each case.

To cut the tipping paper strip, this is between the Knife body 52 of the suction roller 36 and the cutting blade 34 of the knife roller 32 passed, wherein the width of the tipping paper strip is preferably smaller than the width of the cutting region 60th

In the Fig. 5a, 5b For example, various views of the area between the knife roller 32 and the suction roller 36 in the region of cutting are shown. With continuous rotation of the knife roller 32 and the suction roller 36, first the wing portions of the cutting guide flanks 62.1, 62.2 enter the recess 38 without the front of the cutting guide flanks 62.1, 62.2 touching the trailing edge of the knife body 52 of the suction roller 36. In this case, the cutting guide flanks 62.1, 62.2 surround the interposed and uniformly conveyed tipping paper strip, which is not shown in the figures, before the cut is made.

For the implementation of the straight solid edge cut for cutting the tipping paper strip in the covering sheet, the cutting edge 64 is formed in a straight line and aligned in particular parallel to the axis of rotation of the knife roller 32.

Furthermore, the edges, in particular in the conveying direction of the suction roll 36 upper trailing edge of the blade body 52 are aligned axially parallel to the axis of rotation of the suction roll 36. Both the cutting edge 64 of the blades 34 of the knife roller 32 and the cutting edge of the knife body 52 of the suction roll 36 are axially parallel to the axes of rotation of the respective roller 32 and 36. In full-edge section of the tipping paper strip is initiated over the entire width of the cutting process, further also the cut is completed simultaneously over the entire width of the tipping paper strip. Here, the cutting edges of the knife slide 34 and the blade 52 of the suction roller 36 is not under punctiform mutual contact along each other.

In Fig. 6 3, the process of fully-edged cutting of the tipping paper strip with the arrangement of the cutting knife 34 and the lower-side knife body 52 is shown schematically in a phase representation. In this case, the front ends of the cutting guide flanks 62.1, 62.2 of the knife dip into the recess 38 of the suction roll 36, without the cutting edge 64 of the knife being brought into contact with the cutting edge of the knife body 52.

In the phase a), the immersion process of the cutting blade 34 is shown, in which case the cutting blade 34 still has no contact with the blade body 52. In the subsequent phase b), the cutting guide flanks 62.1, 62.2 are in contact with the trailing edge of the knife body 52, wherein the cutting edge 64 is still above and spaced from the knife body 52. Due to the contacting contact between the cutting guide flanks 62.1, 62.2, the cutting guide flanks 62.1, 62.2 slide along the trailing edge of the knife body 52 until the cutting edge 64 is in cutting contact with the trailing edge of the knife body 52 (phase c)). Here, the resilient cutting blade 34 is deflected to compensate for existing tolerances of the cutting blade 34 to the knife body 52. In phase c) begins the full-edged cut of the tipping paper strip.

Due to the deflection of the cutting blade 34 between the phase b) and c) before the beginning of cut (phase c)) due to the resilient deflection of any misalignment of the blade 34 is compensated to the axis of rotation of the knife roller 32 and inaccuracies in the angle of the cutting edges.

For cutting the tipping paper strip, the cutting edge 64 dips into the recess 38, so that after reaching the lowest immersion point (phase e)) the cut is completed. Subsequently, the knife 34 emerges again from the recess 38 (see phase f)).

According to the in Fig. 6 shown various phases, a full-edged separating cut is carried out for the separation of the covering sheets from the tipping paper strip, wherein for carrying out the cutting, the conveying speed of the tipping paper strip before, during and after the cutting process remains unchanged. For this purpose, no oscillator or other means is provided in the feeder, by which the conveying speed of the tipping paper strip would be varied.

All mentioned features, including the drawings alone to be taken as well as individual features that are disclosed in combination with other features are considered alone and in combination as essential to the invention. Embodiments of the invention may be accomplished by individual features or a combination of several features. In the context of the invention, features which are identified by "particular" or "preferably" are to be understood as optional features.

LIST OF REFERENCE NUMBERS

1

contraption

2

Covering paper strip

4

supply roll

5

axis

6

off roll

8th

Off rollers

7

toothed belt

11

drive

12

deflecting

14

breaker

22

glueing

24

glue nozzle

26

deflecting

28

deflecting

29

deflecting

30

Covering cutter

32

knife roll

34

knife

36

suction roll

38

recess

39

Tipping paper

40

bearing surface

42

Saugluftbohrung

43

Saugluftbohrung

47

flank

50

support body

52

knife body

60

cutting area

62.1, 62.2

Cutting guide flanks

64

cutting edge

66

recess

F

filter attachment

Claims (15)

1. Blade (34) for a cutting roller (32) of a filter joining device of a machine of the tobacco-processing industry, in particular filter attaching machine, for cutting an endless or quasi-endless material web strip (2) into material web strip sections (39) of finite length, characterized in that the blade (34) has a cutting area (60) with a cutting edge (64) for cutting the material web strip (2) and two cutting guide sides (62.1, 62.2), wherein the cutting area (60) between the two cutting guide sides (62.1, 62.2) projecting over the cutting area (60) is made so that the cutting edge (64) is offset back with respect to the laterally adjacent cutting guide sides (62,1, 62.2).
2. Blade (34) according to claim 1, characterized in that in each case a recess (66) or an opening is provided between the laterally configured cutting guide sides (62.1, 62.2) and the cutting edge (64) provided between them.
3. Blade (34) according to claim 1 or 2, characterized in that the blade (34) is made in one piece.
4. Blade (34) according to any of the claims 1 to 3, characterized in that the cutting edge (64) is made as a rectangular cross-sectional profile or as a V-shaped cross-sectional profile.
5. Blade (34) according to any of the claims 1 to 4, characterized in that the cutting guide edges (62.1, 62.2) in each case have an outward tapering cross-sectional profile.
6. Blade (34) according to any of the claims 1 to 5, characterized in that the cutting guide sides (62.1, 62.2) are of equal size.
7. Blade (34) according to any of the claims 1 to 6, characterized in that the blade (34) is made of steel.
8. Device for cutting a material web strip (2) of the tobacco processing industry, in particular of a filter joining paper strip, into material web strip sections (39), in particular filter joining paper strip, with a cutting device (2) for cutting the material web strip (2) and with a feeding device for feeding the material web strip (2) to the cutting device, wherein the cutting device is a cutting roller (32) and has a counter-roller (36), particularly a suction roller, cooperating with the cutting roller (32), wherein the material web strip (2) is guided between the cutting roller (32) and the counter-roller (36) and wherein the cutting roller (32) is made with several blades (34) in the circumferential direction according to any of the claims 1 to 7.
9. Device according to claim 8, characterized in that in the circumferential direction the counter-roller (36) has grooves (38) for receiving the cutting guide sides (62.1, 62.2) of the blades (34), wherein in case of simultaneous rotation of the counter-roller (36) and the cutting roller (32), the cutting guide sides (62,1, 62,2) enter into a groove (38) of the counter-roller (36) and can be brought or are brought into contact with a side of the groove and then the cutting area (60) of the blade (34) can be guided or is guided into the groove of the counter-roller (36).
10. Device according to claim 8 or 9, characterized in that the cutting edges (64) of the blade (34) in each case are aligned transverse to the circumferential direction of the cutting roller (32) and the cutting edges (64) are located parallel to the axis of rotation of the cutting roller (32).
11. Device according to any of the claims 8 to 9, characterized in that the cutting device (30) is set up to make a full-edged cut at the time of cutting the material web strip (2).
12. Device according to any of the claims 8 to 11, characterized in that the counter-roller (36) has grooves (38), aligned axially parallel, with in each case groove sides acting as cutting edge in the circumferential direction, wherein the forward groove side of the grooves (38) in the circumferential direction in each case is provided as cutting edge, wherein in particular the cutting edge is formed by means of a blade (52) located in the groove.
13. Device according to any of the claims 8 to 12, characterized in that the preferably oscillator-free or eccentric-free feeding device for the material web strip (2) is set up to feed the material web strip (2) to the cutting device (30) with a constant conveying speed.
14. Machine of the tobacco processing industry, in particular a filter attaching machine, having an arrangement according to any of the claims 8 to 13.
15. Method for cutting a material web strip of the tobacco processing industry, in particular a filter joining paper strip, into material web strip sections (39), in particular filter joining paper strip sections, with the use of a device according to any of the claims 8 to 13.

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