WO2025040412A1 - Crimpwalze, crimpwalzenpaar, crimpvorrichtung und maschine der tabak verarbeitenden industrie sowie verfahren zum crimpen einer flachbahn und herstellen eines strangs, stabförmige artikel - Google Patents
Crimpwalze, crimpwalzenpaar, crimpvorrichtung und maschine der tabak verarbeitenden industrie sowie verfahren zum crimpen einer flachbahn und herstellen eines strangs, stabförmige artikel Download PDFInfo
- Publication number
- WO2025040412A1 WO2025040412A1 PCT/EP2024/072035 EP2024072035W WO2025040412A1 WO 2025040412 A1 WO2025040412 A1 WO 2025040412A1 EP 2024072035 W EP2024072035 W EP 2024072035W WO 2025040412 A1 WO2025040412 A1 WO 2025040412A1
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- WO
- WIPO (PCT)
- Prior art keywords
- crimping
- crimping roller
- processing industry
- roller
- flat web
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
Definitions
- the invention relates to a crimping roller for a crimping device in the tobacco processing industry, on the outer surface of which grooves and teeth are arranged alternately in the circumferential direction of the crimping roller.
- the invention further relates to a pair of crimping rollers and a crimping device in the tobacco processing industry.
- the invention also relates to a machine in the tobacco processing industry, having a crimping device.
- the invention further relates to a method for crimping a flat strip and a method for producing a strand in the tobacco processing industry.
- the invention relates to a rod-shaped article in the tobacco processing industry.
- Flat strips are used for various purposes in the tobacco processing industry and are often processed in a continuous process to form an infinitely long strand. From such a strand rod-shaped segments or articles from the tobacco processing industry can be produced.
- the flat web can be a paper web, and the segments made from a corresponding strand are paper filters or paper filter segments.
- Other examples of a strand being used to produce a rod-shaped segment from the tobacco processing industry are the processing of a flat web made from reconstituted tobacco material (RECON) or from PLA film.
- RECON reconstituted tobacco material
- the rod-shaped segments cut from a corresponding strand can be used or employed as a tobacco segment or as a cooling segment in so-called HNB articles (for “Heat-Not-Burn”), which are also known as THP articles (for “Tobacco-Heated-Product”).
- HNB articles for “Heat-Not-Burn”
- THP articles for “Tobacco-Heated-Product”.
- Important process steps in processing the flat sheet into a strand from which, for example, one of the rod-shaped articles mentioned above can be cut to length are the transformation of the flat sheet from a flat, spread-out state into a folded or gathered intermediate state and the subsequent compression into a strand with an essentially round cross-section.
- the material of the flat sheet is deliberately weakened, deformed or even separated in sections along crimp lines.
- the crimp lines can run in the lengthwise direction of the flat sheet (longitudinal crimping) or in a direction transverse to the lengthwise direction (transverse crimping).
- the flat web is processed, i.e. crimped, in an effective area between a pair of intermeshing crimping rollers.
- the crimping rollers bring out longitudinally extending Crimp lines in the endless web.
- the material of the flat web can be stretched along the crimp lines, for example to achieve a targeted weakening of the material along the crimp lines.
- the flat web can also be given a three-dimensional structure in a plane perpendicular to its longitudinal direction, i.e. deformed, for example in a wave-like or zigzag shape. The three-dimensional structure makes it easier to gather the flat web transversely to its longitudinal direction and also to subsequently form the strand.
- a crimping device is known, for example, from EP 3 624 615 B1.
- crimping device is known from WO 2021/136612 A1.
- properties of the crimped flat strip are evaluated and, depending on these properties, a crimping depth, which is a measure of how far or deeply the crimping rollers engage with each other, is changed.
- a crimping roller for a crimping device in the tobacco processing industry on whose jacket surface, preferably formed in one piece, grooves and teeth are arranged alternately in the circumferential direction of the crimping roller, wherein the crimping roller is designed to be rotatable about an axis of rotation, wherein this crimping roller is further developed in that the grooves have a groove base curved parallel to the axis of rotation and the teeth have a tooth head that is flat at least in sections.
- the grooves and teeth of the crimping roller are arranged alternately in an axial direction of the rotation axis and in particular directly next to one another.
- the teeth and grooves of the crimping roller are closed in the circumferential direction, i.e. at the same axial position of the rotation axis all the way around, i.e. along the entire circumference.
- the grooves and teeth are each at a constant distance from the rotation axis at their axial position.
- the crimping roller is therefore in particular a body that is rotationally symmetrical with respect to its rotation axis.
- Crimping rollers with different profiles are known in the tobacco processing industry. However, it has been found that there is currently no profile that is suitable for a large number of different flat sheets in the tobacco processing industry in the sense that equally good crimping results can be achieved for different flat sheets.
- the crimping roller according to aspects of the invention is advantageously suitable for crimping different flat sheets, in particular flat sheets made of different materials from the tobacco processing industry.
- flat sheets made of paper can be advantageously crimped.
- the flat sheet can be either a single-layer or a multi-layer flat sheet made of paper.
- the flat sheet can be a single-layer or multi-layer sheet made of a nonwoven material, in particular a nonwoven material made of paper.
- the flat sheet can also be a PLA film (polylactide) or a tobacco film.
- the tobacco film can be produced using the slurry process (also referred to as CLT film (cast leaf tobacco)) or it can be produced using the paper process.
- the aforementioned flat sheets from the tobacco processing industry are merely examples and not exhaustive.
- the crimping roller according to aspects of the invention has proven to be suitable for crimping these materials.
- the profile of the crimping roller can therefore be used universally for a large number of materials from the tobacco processing industry.
- Rod-shaped articles or segments in the tobacco processing industry that are made from a flat sheet crimped with such a crimping roller exhibit advantageous properties. For example, only small fluctuations in the tensile resistance occur during ongoing production. In other words, the crimping roller can be used to achieve a very consistent manufacturing process in which high-quality products can be manufactured continuously.
- a tensile resistance that is as constant as possible is desirable for paper filters or paper filter segments. Small fluctuations in the tensile resistance are also advantageous when processing PLA film or tobacco film. Rod-shaped segments made from crimped tobacco film or PLA film are often processed in HNB articles. Small fluctuations in the tensile resistance of these segments can improve the overall quality of the HNB article.
- the crimping roller is developed in that the tooth heads of the teeth each have a flat section, wherein the flat sections extend in an imaginary cylinder surface constructed around the axis of rotation.
- the crimping roller is developed in that the groove base, viewed in a plane in which the axis of rotation runs, describes a curve whose slope is continuous.
- the groove base viewed in the said plane, describes a conic section, in particular a circular arc, preferably with a radius of 0.15 mm to 4.0 mm, particularly preferably of 0.18 mm to 0.35 mm, an elliptical arc or a parabola.
- the combination of a flattened tooth head and a round, especially circular, groove base has proven to be an advantageous combination.
- a variety of different flat strips can be processed.
- the flat sheet is compressed in the area of the groove base.
- the flat sheet is stretched in the area of the flanks of the teeth.
- the flat sections or tops of the teeth mean that the flat sheet is only slightly stretched or not stretched at all in this area.
- kinks or targeted material weakening can be introduced into the flat sheet at the transition between the tooth flanks and the flat sections, up to and including breakthroughs, cracks or the like running in sections along the length of the flat sheet. This targeted treatment of the flat sheet, i.e.
- section-by-section compression weakening in sections and also section-by-section deformation or tearing in sections viewed in the transverse direction of the flat sheet, leads to a structure of the flat sheet that has a positive effect on the subsequent process steps.
- the flat sheet can be easily gathered together and processed into a strand. The crimping therefore has a positive effect on the properties of a rod-shaped segment made from such a flat sheet.
- the material weakenings introduced in sections lead to a reduction in the formation of channels in a segment made from such a flat sheet or to the fact that channel formation in a segment made from such a flat sheet is reduced or can be avoided.
- the crimping roller is developed in such a way that a flank angle of the teeth lies between 15° and 40°, in particular between 16° and 22° or between 25° and 35°.
- the said flank angle is measured between the two flanks of a tooth.
- the two flanks of a tooth enclose an angle that lies in the said interval.
- the flank angle is an opening angle that is enclosed by the two flanks of the teeth in the said plane.
- the intervals for the flank angle have proven to be advantageous with regard to the desired properties of the crimped flat strip.
- the crimping roller is developed in such a way that, viewed in a direction parallel to the axis of rotation, the tooth head has a tooth head width, preferably between 0.05 mm and 0.7 mm, in particular between 0.08 mm and 0.2 mm or between 0.4 mm and 0.6 mm, and the tooth head together with the adjacent groove has a structural width, wherein the tooth head width is between 8% and 50%, in particular between 10% and 30% or between 25% and 38%, of the structural width.
- the above-mentioned ratios between the tooth head width and the structural width which is the sum of the tooth head width and the width of the adjacent groove, have also proven to be advantageous.
- the tooth head is sharp-edged or has a chamfer or rounding on its edges, where a surface of the crimping roller transitions from the tooth head into the adjacent groove, or the number of tooth heads is greater than 150 or 200 or 250 or 300.
- the transition between the number head and the adjacent groove can be designed with more or less sharp edges. While a sharp transition promotes the formation of deformations and even cracks in the flat track, a rounded transition will significantly reduce this effect.
- a chamfer can be a good interim solution to achieve deformation or cracking on the one hand, but not to allow these to become too severe.
- the surface roughness of the crimping roller determines, among other things, the intensity of the interaction between the crimping roller and the flat sheet to be processed. A high level of roughness leads to a high frictional resistance between the surface of the crimping roller and the flat sheet. Accordingly, a relative movement of the flat sheet to the surface of the crimping roller is avoided or prevented.
- a lower surface roughness of the crimping roller leads to a low frictional resistance and thus allows a relative movement between the surface of the crimping roller and the flat sheet. This can be a desirable effect.
- a relative movement of the flat sheet relative to the surface of the crimping roller for example a sliding of the flat sheet transversely to its longitudinal direction, can be desirable, since the crimping process always leads to the width of the flat sheet increasing.
- the flat strip has a larger width when crimped than when uncrimped. With other In other words, it is necessary that the outer areas of the flat strip move transversely to the longitudinal direction of the flat strip during the crimping process in order to compensate for the increase in width caused by the crimping process. This evasive movement is facilitated by a low surface roughness of the crimping roller.
- a crimping roller pair having a first and a second crimping roller according to one or more of the aforementioned embodiments, wherein the first and the second crimping roller of the crimping roller pair are arranged such that the teeth of the first crimping roller engage in the grooves of the second crimping roller and vice versa, wherein in particular the crimping roller pair with the intermeshing teeth of the first crimping roller and the second crimping roller has a crimping depth between 100 pm and 1100 pm, preferably between 150 pm and 400 pm or between 500 pm and 800 pm.
- Such a pair of crimping rollers is ideal for processing a wide range of different flat sheets in the tobacco processing industry.
- the pair of crimping rollers has the same or similar advantages as those already mentioned with regard to the crimping roller itself, so there is no need to repeat them.
- the first and second crimping rollers of the crimping roller pair are arranged in particular such that their rotation axes are aligned parallel to one another. Furthermore, the crimping roller pair has in particular a crimping depth control device with which a crimping depth can be adjusted.
- the crimping depth is a measure of how far the teeth of the first crimping roller engage in the grooves of the second crimping roller and vice versa.
- the crimping depth can be measured, for example, based on the distance between the tooth heads of the first crimping roller and the tooth heads of the second crimping roller, in a plane in which the two rotation axes of the crimping rollers extend.
- the ratio of the structural width of the teeth minus twice the tooth width of the teeth to twice the crimping depth is greater than 1 or greater than 0.5.
- a measure of the local deformation or the local pulling apart of the web material or the flat web is, for example, in particular the air permeability according to ISO 2965 of greater than 3000 CU (Coresta Unit) or 3500 CU or 4000 CU and/or the web thickness of the flat web of 50 pm to 600 pm, preferably between 400 pm and 600 pm, and/or a grammage between 20 g/m 2 and 100 g/m 2 , preferably between 40 g/m 2 and 80 g/m 2 .
- the flat web is preferably a paper web or a flat web made of paper, in which the web has a proportion or content of paper or cellulose of more than 70% or 80% or 90%.
- the flat web contains no tobacco or is designed as a tobacco-free paper web.
- a crimping device in the tobacco processing industry for processing a flat web in the tobacco processing industry, having a flat web feed device, at least one crimping roller according to one or more of the aforementioned embodiments and a counter bearing that interacts with the crimping roller and a transfer device.
- the flat web feed device is designed to feed the flat web into an active area between the at least one crimping roller and the counter bearing that interacts with the crimping roller.
- the transfer device is designed to feed the crimped flat web from the active area to a downstream processing device, in particular a strand forming device.
- the flat web feed device is especially designed to feed the flat web as an endless flat web.
- the flat web feed device has, for example, at least one bobbin holder and a bobbin changer, including a flat web connecting device, for example a splicer.
- the flat web connecting device can connect an end of an outgoing flat web to a beginning of a new flat web so that an endless flat web can be provided for processing.
- the active area between the two crimping rollers is at least the area in which the two crimping rollers mesh with each other, i.e. the grooves and teeth overlap when viewed in cross-section.
- This cross-section can be viewed in a plane in which the two axes of rotation of the crimping rollers extend.
- the flat web feed device has, for example, suitable and generally known web guide rollers or general web guides such as barks or chutes.
- the transfer device can also have suitable guide rollers or one or more of the flat web guide devices mentioned in order to remove the crimped flat web from the active area and feed it to the processing device arranged downstream.
- the crimping device is further developed in that the counter bearing is a crimping roller according to one or more of the aforementioned embodiments or in that the crimping device has a pair of crimping rollers according to the invention, as described above. According to such an embodiment, the crimping device has a pair of crimping rollers according to aspects of the invention.
- a machine of the tobacco processing industry comprising a crimping device with at least one crimping roller according to one or more of the above-mentioned embodiments and with a counter bearing cooperating with the crimping roller or with a pair of crimping rollers described above.
- the machine of the tobacco processing industry further comprises: a flat web feed device which is designed to feed a flat web of the tobacco processing industry to an active region between the crimping roller and the counter bearing cooperating with the crimping roller, a transfer device and a strand forming device arranged downstream, wherein the transfer device is designed to remove the crimped flat web from the active region and feed it to the strand forming device and the strand forming device is designed to form a strand of the tobacco processing industry from the crimped flat web.
- the second crimping roller in such a machine in the tobacco processing industry is also designed according to one or more of the embodiments previously mentioned with regard to the crimping roller.
- the machine of the tobacco processing industry can also have a cutting device with which segments of the tobacco processing industry are cut from the strand produced. These segments can be fed into further processing steps. For example, the segments can be combined with other segments to form rod-shaped articles of the tobacco processing industry and processed. Such articles of the tobacco processing industry are in particular HNB articles.
- the machine of the tobacco processing industry is advantageous in that developed in that the counter bearing is a crimping roller according to one or more of the aforementioned embodiments and the crimping roller and the counter bearing are arranged such that the teeth of the crimping roller engage in the grooves of the counter bearing with a crimping depth and vice versa, wherein the crimping device has a crimping depth control device which is designed and configured to change the crimping depth, wherein the crimping depth control device is further configured to receive a value of a tensile resistance of a segment of the tobacco processing industry produced from the rod of the tobacco processing industry and to change the crimping depth according to a linear relationship depending on the value for the tensile resistance.
- the machine in the tobacco processing industry can also have a tensile resistance measuring device with which a tensile resistance is measured either on the strand or on rod-shaped segments that were cut to length from the strand produced with the machine.
- the measured value of the tensile resistance can also be measured on a finished article in the tobacco processing industry that has a segment that was cut to length from the strand produced with the machine.
- the profile of the crimping roller advantageously allows the tensile resistance to be adjusted by changing the crimping depth, whereby a linear relationship can advantageously be used as a basis. This simplifies the control of the machine considerably and allows simple and precise feedback quality assurance.
- a method for crimping a flat web of the tobacco processing industry comprising the following steps: feeding a flat web of the tobacco processing industry into an effective area between a crimping roller, which is designed according to one or more of the aforementioned embodiments, and a counter bearing cooperating with the crimping roller, crimping the flat web in the effective area and removing the crimped flat web from the effective area and transferring the crimped flat web to a downstream processing device, in particular to a strand forming device.
- the object is achieved by a method for producing a strand of the tobacco processing industry, comprising the following steps: feeding a flat web of the tobacco processing industry into an active area between a crimping roller, in particular according to one or more of the aforementioned embodiments, and a counter bearing interacting with the crimping roller, crimping the flat web in the active area, removing the crimped flat web from the active area and transferring the crimped flat web to a strand forming device arranged downstream, forming a strand of the tobacco processing industry in the strand forming device from the crimped flat web, wherein the flat web has a width B1 before the active area and a width B2 after the active area and wherein the ratio B1/B2 is greater than 1.2 or 1.3.
- the counter bearing is a crimping roller according to one or more of the previously mentioned embodiments and the crimping roller and the counter bearing are arranged such that the teeth of the crimping roller engage in the grooves of the counter bearing with a crimping depth and vice versa, wherein the crimping depth is variable and/or is changed according to a linear relationship depending on a value for the tensile resistance of a segment of the tobacco processing industry produced from the rod of the tobacco processing industry.
- the method for crimping the flat sheet as well as the method for producing the rod in the tobacco processing industry have the same or similar advantages as those already mentioned with regard to the crimping device and the machine in the tobacco processing industry, so that repetition will be avoided.
- the process is further developed by crimping a paper web as a flat web.
- the flat web can be either a single-layer as well as a multi-layer flat sheet made of paper.
- the flat sheet can be a single-layer or multi-layer sheet made of a nonwoven material, in particular a nonwoven material made of paper.
- the flat sheet can also be a PLA film (polylactide) or a tobacco film.
- the tobacco film can be produced using the slurry process (also referred to as CLT film (cast leaf tobacco)) or it can be produced using the paper process.
- the rod produced by the tobacco processing industry is in particular a filter rod.
- a rod-shaped article of the tobacco processing industry comprising at least one rod-shaped segment, which is produced by cutting to length a strand produced according to a method according to one or more of the aforementioned embodiments.
- Such a rod-shaped article advantageously has improved properties with regard to a constancy of the tensile resistance value. In other words, process-related tensile resistance fluctuations must be accepted, which improves the quality of the rod-shaped article.
- the rod-shaped segment is in particular a filter segment, furthermore in particular a filter segment which is made of paper, i.e. a paper filter segment.
- Embodiments according to the invention can fulfill individual features or a combination of several features.
- Fig. 1 is a schematically simplified representation of a machine of the tobacco processing industry comprising a crimping device with a pair of crimping rollers, which has a crimping roller according to an embodiment,
- Fig. 2 shows a schematically simplified cross-section of a profile of a crimping roller according to an embodiment
- FIG. 3 and 4 schematically simplified side views of a sectionally shown pair of crimping rollers, according to two embodiments.
- Fig. 5 and 6 also show schematically simplified side views of crimping roller pairs shown in sections, with the cross-section showing a course of the crimped flat track in the effective area between the crimping rollers.
- Fig. 1 shows a simplified schematic representation of a machine 2 of the tobacco processing industry.
- the machine 2 has a crimping device device 4 with a crimping roller 6 and a counter bearing 8 that interacts with the crimping roller 6.
- the counter bearing 8 is in particular designed to be identical in construction to the crimping roller 6.
- the crimping roller 6 and the counter bearing form a crimping roller pair 10.
- the machine 2 also has a flat web feed device 12 that is designed to feed a flat web 14 from the tobacco processing industry to an active area 16 between the crimping roller 6 and the counter bearing 8 in a transport direction T.
- the flat web 14 is, for example, a paper web.
- the crimping roller 6 interacts with the counter bearing 8 in the effective area 16, for example the crimping roller 6 engages in the counter bearing 8.
- the flat web feed device 12 has, for example, a bobbin 18 on which the flat web 14 is provided.
- the flat webs or paper webs are provided from a paper bale, wherein the flat webs or paper webs are laid on top of one another in a meandering shape (festoons).
- the flat web feed device 12 can also have a bobbin changer (not shown), in particular including a flat web connecting device, for example a splicer.
- the flat web connecting device can be designed to connect a running end of a flat web to a start of another flat web, so that the flat web 14 can be continuously fed into the crimping device 4 and the units further downstream in the transport direction T.
- the flat web feed device 12 has one or more transport rollers 20 in addition to the bobbin 18, with which the flat web 14 can be fed to the active area 16.
- the flat strip 14 is crimped in the effective area 16.
- the crimping device 4 is designed as a longitudinal crimper.
- the crimping device 4 introduces crimp lines running in the longitudinal direction of the flat strip 14 into the flat strip 14.
- the material is the flat web 14 is, for example, deliberately weakened, deformed or even separated in sections.
- the flat web 14 leaves the crimping device as a crimped flat web 22.
- This is fed by a transfer device 24, exemplified by two transport rollers 20, to a strand forming device 26 arranged downstream.
- the transfer device 24 can also be designed as a chute or channel to guide the crimped flat web 22, for example, wherein the transfer device 24 can also be set up to gather the crimped flat web 22 transversely to its longitudinal direction.
- the transfer device 24 removes the crimped flat web 22 from the active area 16 and feeds it to the strand forming device 26.
- the strand forming device 26 is set up to form a strand 28 for the tobacco processing industry from the crimped flat web 22.
- the strand forming device 26 has a format unit 30 (not described in detail) which has a format channel and forms the strand 28 from the crimped flat strip 22 in a manner known per se.
- the machine 2 also has, for example, a knife device 32 which is designed to cut individual segments 34 from the strand 28.
- the segments 34 can be further processed with other segments to form rod-shaped articles 68 for the tobacco processing industry, for example HNB articles. This further processing is indicated schematically with an arrow.
- the flat web 14 is a paper web from which a paper filter rod is made.
- the cut segments 34 are in this case paper filter segments, which can be put together with tobacco sticks, for example, and further processed into conventional rod-shaped articles 68 of the tobacco processing industry.
- the paper filter segments can also be further processed with other segments to form an HNB article as a rod-shaped article 68 of the tobacco processing industry.
- the flat web 14 is, for example, a single-layer or multi-layer paper web.
- the flat web 14 can be a paper web made of a single-layer or multi-layer nonwoven material, in particular of paper.
- the flat web 14 can also be a Flat web made of reconstituted tobacco material, for example a web made of reconstituted tobacco material produced using the slurry process or the paper process.
- a tobacco rod 28 is produced from the flat web 14, from which individual tobacco segments or tobacco sticks are cut to length as segments 34. These can also be put together with other segments, for example to form an HNB article, and further processed.
- the flat web 14 can be a PLA film, from which a strand 28 made of crimped PLA film is produced.
- the segments 34 cut to length from such a strand 28 can serve as cooling sections in an HNB article and can be put together with other segments and further processed to form an HNB article.
- the machine 2 is advantageously suitable for processing different flat webs 14.
- Fig. 2 shows a schematically simplified cross-section of a profile of the crimping roller 6 shown in sections.
- the crimping roller 6 has on its outer surface 36 alternating closed circumferential grooves 38 and teeth 40 in the circumferential direction of the crimping roller 6.
- the crimping roller 6 is designed to be rotatable about a rotation axis 42, which is shown in Fig. 2 with a dash-dotted line and whose position is only schematic.
- the crimping roller 6 and the counter bearing 8 are arranged such that the teeth 40 of the crimping roller 6 engage in the grooves 38 of the counter bearing 8, and vice versa.
- the grooves 38 have a curved groove base 44.
- the teeth 40 have a flat chen tooth head 46 with a flat section 48.
- the flat sections 48 of the tooth heads 46 extend in an imaginary cylinder surface constructed around the axis of rotation 42.
- the flat sections 48 are therefore each cylinder-shaped.
- the groove base 44 viewed in a plane in which the axis of rotation 42 runs and which at least approximately corresponds to the drawing plane of Fig. 2, describes a curve whose slope is continuous. In other words, the slope of the groove base 44 does not change suddenly.
- the curved groove base 44 is not acute-angled or otherwise does not have any abrupt changes in slope in the plane under consideration.
- the groove base 44 viewed in the plane described, has the shape of a conic section and describes, for example, a circular arc, an elliptical arc or a parabola. In the exemplary embodiment shown, the groove base 44 describes a circular arc.
- the teeth 40 of the crimping roller 6 have a flank angle a that is between 15° and 40°, in particular between 20° and 35°.
- the flank angle a is the angle between the lines indicated by a dashed line in Fig. 2, which, also viewed in the described plane, run in the flanks 50 of the teeth.
- the flank angle a is measured between the opposing flanks 50 of the teeth 40.
- the crimping roller 6 is further designed such that in a direction parallel to the axis of rotation 42 the tooth head 46 has a tooth head width 52 and the tooth head 46 together with the adjacent groove 38 has a structural width 54.
- the tooth head width 52 is between 20% and 50%, in particular between 30% and 40%, and in particular between 35% and 40% of the structural width 54.
- the crimping roller 6 is designed, for example, such that the tooth head 46 is designed with sharp edges at its edges 56, at which a surface 58 of the crimping roller 6 transitions from the tooth head 46 into the adjacent groove 38. Furthermore, a chamfer or a rounding with a small radius can be provided, for example, on this edge 56.
- the surface 58 of the crimping roller 6 is considered to be in particular the groove base 44, the flanks 50 and the tooth head 46 or the flat section 48 of the tooth head 46.
- Fig. 3 shows a schematically simplified perspective side view of a pair of crimping rollers 10 shown in sections.
- a first crimping roller 6a and a second crimping roller 6b are arranged such that the teeth 40 of the first crimping roller 6a engage in the grooves 38 of the second crimping roller 6b and vice versa.
- the two crimping rollers 6a, 6b are arranged relative to one another such that the two crimping rollers 6a, 6b engage with one another with a crimping depth of 60.
- Fig. 4 shows another pair of crimping rollers 10, having a first crimping roller 6a and a second crimping roller 6b. These two crimping rollers 6a, 6b are also arranged in such a way that the teeth 40 of the first crimping roller 6a engage in the grooves 38 of the second crimping roller 6b and vice versa.
- the difference between the pair of crimping rollers 10 shown in Fig. 3 and that shown in Fig. 4 lies in the width of the tooth heads 46. While the teeth 40 of the crimping rollers 6a, 6b according to the embodiment shown in Fig. 3 have a comparatively small tooth head width 52 (see also Fig.
- the crimping rollers 6a, 6b of the pair of crimping rollers 10 shown in Fig. 4 are designed with a relatively larger tooth head width 52.
- the tooth head width 52 can have an influence on the deformation and stretching of the flat track 14 that takes place in the effective area 16 between the crimping rollers 6a, 6b, i.e. in particular in an area in which the crimping rollers 6a, 6b engage with one another.
- Figs. 5 and 6 in which schematically simplified side views of the first and second crimping rollers 6a, 6b shown in sections are shown.
- the flat track 14 is shown in cross section in an effective area 16 between the crimping rollers 6a, 6b.
- the first crimping roller 6a and the second crimping roller 6b are designed with a relatively small tooth head width 52.
- the course of the flat track 14 in the effective area 16 between the crimping rollers 6a, 6b is shown schematically and simplified.
- the flat track 14 is locally deformed, for example bent, so that it takes on a zigzag shape.
- an expansion area 62 in which the flat track 14 is expanded In the area between the adjacent tooth heads 46 of the first and second crimping rollers 6a, 6b there is an expansion area 62 in which the flat track 14 is expanded. The extent of this expansion and the deformation introduced into the flat track 14 at the edges 56 of the tooth heads 46 can be varied via the tooth head width 52.
- Fig. 6 This is shown by the exemplary embodiment shown in Fig. 6, which corresponds approximately to the situation known from Fig. 4.
- the two crimping rollers 6a, 6b have a larger tooth head width 52 compared to the embodiment in Fig. 5. This means that with the same crimping depth 60, a greater stretching of the flat track 14 takes place in the stretching area 62. A greater deformation of the flat track 14 also takes place in the area of the edges 56 of the tooth heads 46.
- the machine 2 of the tobacco processing industry can be provided with a crimping depth control device 64, which is designed and configured to change the crimping depth 60.
- the crimping depth control device 64 can also be configured to receive a value of a tensile resistance of a segment 34 of the tobacco processing industry produced from the strand 28 of the tobacco processing industry.
- the crimping depth control device 64 changes the crimping depth 60, specifically according to a linear relationship.
- the crimping depth 60 can be adjusted to change the tensile resistance of the segments 34 produced.
- the machine 2 has, for example, a tensile resistance measuring device 66 for measuring the tensile resistance.
- the measured value M of this can be provided to the crimping depth control device 64, so that a feedback control of the Crimping depth is possible depending on the measured tensile resistance of the segments 34.
- a rod-shaped article 68 can be produced from the segments 34 by further processing steps, which are indicated with an arrow, which has a segment 34 which is obtainable by cutting the produced strand 28 to length.
- This rod-shaped segment 34 is, for example, a filter segment, furthermore, for example, a paper filter segment.
Landscapes
- Manufacturing Of Cigar And Cigarette Tobacco (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480053937.7A CN121712404A (zh) | 2023-08-18 | 2024-08-02 | 烟草加工工业的压接辊、压接辊对、压接装置和机器,以及用于压接扁平幅面和制造条的方法、棒状制品 |
| EP24754629.4A EP4739150A1 (de) | 2023-08-18 | 2024-08-02 | Crimpwalze, crimpwalzenpaar, crimpvorrichtung und maschine der tabak verarbeitenden industrie sowie verfahren zum crimpen einer flachbahn und herstellen eines strangs, stabförmige artikel |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023122163.9A DE102023122163A1 (de) | 2023-08-18 | 2023-08-18 | Crimpwalze, Crimpwalzenpaar, Crimpvorrichtung und Maschine der Tabak verarbeitenden Industrie sowie Verfahren zum Crimpen einer Flachbahn und Herstellen eines Strangs, stabförmige Artikel |
| DE102023122163.9 | 2023-08-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025040412A1 true WO2025040412A1 (de) | 2025-02-27 |
Family
ID=92300737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/072035 Ceased WO2025040412A1 (de) | 2023-08-18 | 2024-08-02 | Crimpwalze, crimpwalzenpaar, crimpvorrichtung und maschine der tabak verarbeitenden industrie sowie verfahren zum crimpen einer flachbahn und herstellen eines strangs, stabförmige artikel |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4739150A1 (de) |
| CN (1) | CN121712404A (de) |
| DE (1) | DE102023122163A1 (de) |
| WO (1) | WO2025040412A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119856801A (zh) * | 2025-02-27 | 2025-04-22 | 河南中烟工业有限责任公司 | 一种加热卷烟发烟基质加工成型装置及加工系统 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2995481A (en) * | 1955-02-15 | 1961-08-08 | Muller Paul Adolf | Crimped flat material for filter plugs |
| US3519521A (en) * | 1967-05-22 | 1970-07-07 | Celfil Co | Apparatus for making filtering material for cigarettes |
| GB1275405A (en) * | 1968-05-03 | 1972-05-24 | Carreras Ltd | Method and apparatus for making a cigarette filter rod |
| US4047536A (en) * | 1974-06-19 | 1977-09-13 | Asfour Emil S | Method of making cigarettes and a cigarette made according thereto |
| EP3624615B1 (de) | 2017-05-15 | 2021-03-17 | Philip Morris Products S.a.s. | Verfahren und vorrichtung zur herstellung einer gecrimpten materialfolie |
| WO2021136612A1 (en) | 2019-12-30 | 2021-07-08 | Philip Morris Products S.A. | Method and apparatus to crimp a sheet |
| US20210244080A1 (en) * | 2018-06-29 | 2021-08-12 | Philip Morris Products S.A. | Method of manufacturing an aerosol-generating article component and aerosol-generating article including said component |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3226280A (en) | 1955-04-28 | 1965-12-28 | Muller Paul Adolf | Apparatus for producing an endless filter string |
| US2954036A (en) | 1958-06-03 | 1960-09-27 | Olin Mathieson | Cellulosic sheet and filter, and process therefor |
| CH521156A (de) | 1969-04-30 | 1972-04-15 | Celfil Co | Verfahren zur Behandlung von endlosen Bahnen aus faserhaltigem Material zwecks Herstellung eines Filterstrangs |
| DE102013223076A1 (de) * | 2013-11-13 | 2015-05-13 | Hauni Maschinenbau Ag | Prägewalze |
-
2023
- 2023-08-18 DE DE102023122163.9A patent/DE102023122163A1/de active Pending
-
2024
- 2024-08-02 EP EP24754629.4A patent/EP4739150A1/de active Pending
- 2024-08-02 CN CN202480053937.7A patent/CN121712404A/zh active Pending
- 2024-08-02 WO PCT/EP2024/072035 patent/WO2025040412A1/de not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2995481A (en) * | 1955-02-15 | 1961-08-08 | Muller Paul Adolf | Crimped flat material for filter plugs |
| US3519521A (en) * | 1967-05-22 | 1970-07-07 | Celfil Co | Apparatus for making filtering material for cigarettes |
| GB1275405A (en) * | 1968-05-03 | 1972-05-24 | Carreras Ltd | Method and apparatus for making a cigarette filter rod |
| US4047536A (en) * | 1974-06-19 | 1977-09-13 | Asfour Emil S | Method of making cigarettes and a cigarette made according thereto |
| EP3624615B1 (de) | 2017-05-15 | 2021-03-17 | Philip Morris Products S.a.s. | Verfahren und vorrichtung zur herstellung einer gecrimpten materialfolie |
| US20210244080A1 (en) * | 2018-06-29 | 2021-08-12 | Philip Morris Products S.A. | Method of manufacturing an aerosol-generating article component and aerosol-generating article including said component |
| WO2021136612A1 (en) | 2019-12-30 | 2021-07-08 | Philip Morris Products S.A. | Method and apparatus to crimp a sheet |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4739150A1 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119856801A (zh) * | 2025-02-27 | 2025-04-22 | 河南中烟工业有限责任公司 | 一种加热卷烟发烟基质加工成型装置及加工系统 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN121712404A (zh) | 2026-03-20 |
| DE102023122163A1 (de) | 2025-02-20 |
| EP4739150A1 (de) | 2026-05-13 |
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