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EP2346363A2 - Appareil de coupe - Google Patents

Appareil de coupe

Info

Publication number
EP2346363A2
EP2346363A2 EP09785600A EP09785600A EP2346363A2 EP 2346363 A2 EP2346363 A2 EP 2346363A2 EP 09785600 A EP09785600 A EP 09785600A EP 09785600 A EP09785600 A EP 09785600A EP 2346363 A2 EP2346363 A2 EP 2346363A2
Authority
EP
European Patent Office
Prior art keywords
cutting
axis
rotation
drum
grinder
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.)
Granted
Application number
EP09785600A
Other languages
German (de)
English (en)
Other versions
EP2346363B1 (fr
Inventor
Thomas Henry White
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Garbuio SpA
Original Assignee
Dickinson Legg Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dickinson Legg Ltd filed Critical Dickinson Legg Ltd
Priority to PL09785600T priority Critical patent/PL2346363T3/pl
Publication of EP2346363A2 publication Critical patent/EP2346363A2/fr
Application granted granted Critical
Publication of EP2346363B1 publication Critical patent/EP2346363B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/363—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of blades mounted on a turning drum
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B7/00—Cutting tobacco
    • A24B7/04—Cutting tobacco by machines with revolving knives
    • A24B7/08—Cutting tobacco by machines with revolving knives with several knives which act one after the other
    • A24B7/12—Cutting tobacco by machines with revolving knives with several knives which act one after the other with cutter axes transverse to the feeding direction

Definitions

  • the present invention relates to cutting apparatus and a method of cutting, particularly, but not exclusively to a cutting apparatus and method of cutting for cutting portions of a laminar product such as tobacco leaves.
  • Tobacco leaves are processed for cigarette manufacture in a primary tobacco process.
  • the laminate portions of the tobacco leaves are compressed and then cut in a cutting machine to create tobacco particles suitable for cigarette manufacturers.
  • the width of cut is between 0.7 and 1.0mm.
  • the length of the tobacco strands produced is highly variable, ranging from less than 1 mm to more than 200mm. The maximum length of particle depends on the sizes of the lamina portions being cut, and these ultimately depend on the dimensions of the leaves from which they came.
  • the present invention provides a means for producing a controlled strand length effect using a tobacco cutting machine fitted with standard, non-profiled knives.
  • the present invention allows the maximum length of the strands of cut tobacco to be limited as described above, but by employing standard plain knives combined with a special mode of operation of the cutting machine knife grinding system.
  • a disadvantage of the use of ribbed or castellated knives is that a large proportion of the knife material has to be removed by expensive and accurate machining operations during the manufacture of the knives. This results in a cost for these consumable items which is several times the cost of the equivalent standard knives.
  • the present invention provides a cutting apparatus comprising, a mouth defined by a jaw assembly for delivering the material to be cut to a cutting position at the mouth; a cutting drum having; at least one knife the, or each, knife having a cutting edge, the cutting drum having drive means therefor and being rotatable about an axis arranged substantially parallel to the mouth such that the cutting edge of the at least one knife is arranged substantially perpendicular to the material to be cut; and a grinder for removing material from the cutting edge of the at least one knife, wherein the grinder is configured to be brought into contact with the cutting edge with a movement in a direction substantially parallel to the axis of rotation of the cutting drum and with a movement in a direction substantially perpendicular to the axis of rotation of the cutting drum.
  • a controlled strand length cutting operation can be achieved with standard, non-profiled knife or knives.
  • the knives used may be of a uniform thickness and do not need to be produced with an expensive machining operation. The overall cost of the apparatus is thus reduced and replacement parts more easily obtained.
  • The, or each knife may be configured to be to be fed in a direction away from the axis of rotation of the cutting drum and towards the cutting position at the mouth, with this arrangement the knives are moved towards the cutting position and can advantageously make repeatable, reliable cuts at the material to be cut.
  • the grinder may be configured to be rotated about an axis arranged substantially parallel to the axis of rotation of the cutting drum at the cutting position allowing the grinder ease of access to the knives to be ground and such that the cutting edge is arranged to lie on an imaginary cylindrical surface.
  • the cutting apparatus may comprise a clamp assembly for compressing the material to be cut at the cutting position.
  • a clamp assembly for compressing the material to be cut at the cutting position.
  • One or more conveyor bands or conveyor belts may form the jaw assembly.
  • the cutting apparatus comprises a control assembly configured to control the movement of the grinder in a direction substantially perpendicular to the axis of rotation of the cutting drum. More preferably, the control assembly is configured to control the movement of the grinder in a direction substantially perpendicular to the axis of rotation of the cutting drum in a series of one or more discrete movements, such that the grinder moves in a substantially castellated motion. In an alternative arrangement, the control assembly is configured to control the movement of the grinder in a direction substantially perpendicular to the axis of rotation of the cutting drum in a series of one or more gradual movements, such that the grinder moves in an undulating motion.
  • These configurations of cutting apparatus and control assembly are found to be particularly useful in providing the knives with a non-standard profile.
  • control assembly is configured to control the movement of the grinder in a direction substantially perpendicular to the axis of rotation of the cutting drum and is configured to control the movement in a direction substantially parallel to the axis of rotation of the cutting drum, wherein the speed of movement the grinder in the direction substantially perpendicular to the axis or rotation of the cutting drum is faster than the speed of movement of the grinder in the direction substantially parallel to the axis of rotation of the cutting apparatus.
  • This configuration is found to be particularly useful for grinding a knife with a castellated profile.
  • the control assembly may comprise a pivoted arm and a geared stepper.
  • the control assembly may adjust the movement of the grinder in a direction substantially perpendicular to the axis of rotation of the cutting drum in the range from 0.2mm to 2.5mm and is found to be particularly useful for cutting controlled length sections of a material.
  • the cutting edges of the at least one knife may be arranged such that the cutting edges correspond to the mouth. It is preferable to provide the mouth parts with a profile corresponding to the profile of the knives, so that the minimum clearance between the knives and the mouth parts is maintained at all points across the cutting width.
  • the present invention provides a method of manufacture of controlled strand length tobacco, configured with the aforementioned cutting apparatus.
  • the present invention provides a method of manufacture for controlled strand length tobacco, comprising the steps of: delivering the tobacco material to be cut to a cutting position at a mouth defined by a jaw assembly; rotating a cutting drum having a cutting edge about an axis arranged substantially parallel to the mouth such that the cutting edge is arranged substantially perpendicular to the material to be cut; and bringing a grinder into contact with the cutting edge with a movement in a direction substantially parallel to the axis of rotation of the cutting drum and with a movement in a direction substantially perpendicular to the axis of rotation of the cutting drum, thereby grinding the cutting edge with a cutting profile.
  • the step of moving the grinder may comprise the step of moving the grinder in a series of one or more discrete movements in a direction substantially parallel to the axis of rotation of the cutting drum and in a direction substantially perpendicular to the axis of rotation of the cutting drum, thereby grinding the cutting edge with a castellated profile.
  • the step of moving the grinder may comprise the step of moving the grinder in a series of one or more gradual movements in a direction substantially parallel to the axis of rotation of the cutting drum and in a direction substantially perpendicular to the axis of rotation of the cutting drum, thereby grinding the cutting edge with an undulating profile.
  • the method may comprise a step of compressing the extruded tobacco material at the jaw assembly.
  • a first longitudinal dimension and a second longitudinal dimension are described.
  • a first longitudinal dimension is a dimension measured substantially along the axis of rotation of the cutting drum and hereinafter referred to also as length (of, for example, cut strands) and width (of, for example, cutting drum).
  • the length of the cut strands of tobacco is therefore a measurement of the dimension of the strand substantially in the direction of the axis of rotation of the cutting drum.
  • the width of the cutting drum is therefore a measurement of the dimension of the cutting drum substantially in the direction parallel to its axis of rotation, and the width of the mouth is therefore a measurement of the dimension of the mouth opening in a direction substantially parallel to the axis of rotation of the cutting drum.
  • movement in a transverse direction we mean in a direction substantially parallel to the axis of rotation of the cutting drum and thus along a length dimension.
  • a second longitudinal dimension is a dimension measured substantially perpendicular to the axis of rotation of the cutting drum hereinafter referred to also as width or depth or thickness.
  • the width or depth of a cut is therefore the dimension of a cut in the plane substantially perpendicular to the axis of rotation of the cutting drum.
  • the width or thickness of a cut strand of tobacco is therefore the dimension of a cut strand measured in the plane substantially perpendicular to the axis of rotation of the cutting drum.
  • a profile we mean the cutting edge on a knife blade and impinging on a material to be cut, a profile may also be the shape of the ground surface produced at a knife tip by the action of a grinder.
  • discrete we mean a change, substantially a step change, in a parameter, for example, a dimension, a state or an operation condition.
  • Figure 1 is a cross sectional view of a tobacco cutter of a conventional design suitable for adaptation to form the cutting apparatus of the present invention
  • Figure 2 is a side view of the cutting drum of the tobacco cutter of Figure 1 , in further detail;
  • Figure 3 is a side view of a portion of the cutting apparatus of the present invention.
  • Figure 4 is a schematic view of the cutting apparatus of the present invention showing a range of movement the grinder
  • Figure 5 is a schematic view of the shape of the knife tip produced by the present invention.
  • Figure 6 is a side view of the knife tip of Figure 5.
  • the cutting apparatus comprises a vibrating feeder 1 , monitor 2 and two converging feed bands 3, 4 which compress and convey the incoming low density tobacco lamina through the mouth 5 towards the cutting drum 6.
  • each feed band 3, 4 is in the form of a conveyor belt provided with compression weighting features.
  • the feed bands 3, 4 form a jaw assembly of the mouth 5 and together define a plenum through which the tobacco lamina passes and is compressed.
  • the cutting drum 6 is supported between bearings and is driven by a motor (not shown) such that the drum rotates at a speed between 200 and 600 rpm.
  • the cutting drum 6 can be fitted with 8 or 10 knives 12 equally disposed around its circumference, although other numbers of knives 12 may be used.
  • Fig 2 shows the cutting drum in more detail.
  • the knives 12 are flat pieces of alloy steel approximately 1 -1.5 mm thick, extending over the full width of the mouth 5.
  • the cutting drum 6 is located adjacent the mouth 5, through which a compressed 'cheese' or 'cake' of tobacco is extruded against the rotating cutting drum 6.
  • the cutting drum 6 is positioned such that the axis of rotation of the cutting drum 6 is substantially parallel to the mouth 5.
  • the knives are fed outwards from a cutting drum by small amounts at frequent intervals.
  • a grinder in the form of a rotating grindstone continually traverses across the width of the cutting drum, sharpening the knives and maintaining a sharp bevelled profile on the knives.
  • the movement of the grindstone ensures that the radius of the knife tips from the mouth and from the centre of the cutting drum remains constant.
  • the grindstone is fed radially, in other words in a radial direction, towards the axis of the cutting drum, and its contact position is kept constant by the action of a fixed diamond which 'dresses' the stone as it passes over it at one end of its stroke.
  • the speed of conveyor belts or feed bands is controlled in a ratio to the speed of the drum so as to produce the required width of cut.
  • the grinder takes the form of a grindstone wheel 7 mounted on an axis parallel to the axis of the cutting drum 6.
  • the grindstone assembly is arranged so that it can be accurately positioned closer to, or further away from, the periphery or outer circumference of the cutting drum 6.
  • the grindstone 7 is driven by a motor and can be rotated.
  • the grindstone 7 and its motor are carried on a pivoted arm 15.
  • the pivoted arm, and thus the grindstone and motor are raised or lowered by means of a geared stepper motor 16 and screw 17.
  • the grindstone assembly is mounted on location apparatus for movement in the transverse direction, in a direction parallel to the axis of rotation of the cutting drum 6.
  • the location apparatus is a traversing trolley 13 supported by linear bearings 14 so that it can move across the width of the cutting drum 6.
  • the position of the grindstone 7 is determined by a leadscrew driven by a motor and provided with positioning apparatus such as a position encoder.
  • the grinder is controlled as follows, with the motions as shown in Figure 4.
  • the grindstone 7 makes one or more traverses of the cutting drum 6, to establish the outer periphery of the knives 12.
  • the grindstone 7 then makes one or more 'plunging' traverses, during which it is moved by a controlled distance towards the centre of the drum at predetermined positions across the traverse.
  • These plunging movements in the radial direction may be abrupt, in which case a castellated effect is produced, or alternatively more gradual, in which case a wavy or undulating effect is produced.
  • the depth of the plunge movement is equal to or greater than the width (or depth) of the cut dimension.
  • the width (or depth) of the cut dimension In order to ensure that the individual strands will be fully cut through at the edges of the castellations or undulating shaped portions, and the strand lengths will be limited to the desired maximum. If the plunge movement in the radial direction is significantly less than the width (or depth) of the cut dimension then the strands may not be fully cut through at the edges of the castellations.
  • the shape of the ground surface of the knife tip is shown in Figure 5 and Figure 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Tobacco Products (AREA)

Abstract

L’invention concerne un appareil de coupe destiné à produire une longueur de brin régulée au moyen d’une machine de coupe de tabac pourvue de couteaux standards non profilés. L’appareil de coupe comprend une ouverture définie par un ensemble mâchoire destiné à distribuer le matériau à couper à une position de coupe au niveau de l’ouverture et d’un tambour de coupe. Le tambour de coupe est équipé d’au moins un couteau, chaque couteau présentant un bord de coupe. Le tambour de coupe comprend des moyens d’entraînement et tourne autour d’un axe agencé sensiblement parallèle à l’ouverture de sorte que le bord de coupe du couteau est agencé sensiblement perpendiculaire au matériau à couper. Un broyeur est utilisé pour retirer le matériau du bord de coupe du couteau et est conçu pour être amené en contact avec ce dernier par déplacement dans une direction sensiblement parallèle à l’axe de rotation du tambour de coupe et par déplacement dans une direction sensiblement perpendiculaire à l’axe de rotation du tambour de coupe. L’appareil de coupe permet de limiter la longueur maximum des brins de tabac coupés par utilisation de couteaux standards lisses combinés à un mode de fonctionnement spécial du système de broyeur à couteau de machine de coupe.
EP09785600.9A 2008-09-09 2009-09-09 Appareil de coupe Active EP2346363B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09785600T PL2346363T3 (pl) 2008-09-09 2009-09-09 Urządzenie tnące

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0816491A GB0816491D0 (en) 2008-09-09 2008-09-09 Controlled strand length cutting of tobacco using uniform thickness knives
PCT/GB2009/051144 WO2010029348A2 (fr) 2008-09-09 2009-09-09 Appareil de coupe

Publications (2)

Publication Number Publication Date
EP2346363A2 true EP2346363A2 (fr) 2011-07-27
EP2346363B1 EP2346363B1 (fr) 2018-02-28

Family

ID=39889072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09785600.9A Active EP2346363B1 (fr) 2008-09-09 2009-09-09 Appareil de coupe

Country Status (7)

Country Link
EP (1) EP2346363B1 (fr)
JP (1) JP5801198B2 (fr)
CN (1) CN102196735B (fr)
GB (1) GB0816491D0 (fr)
HU (1) HUE037314T2 (fr)
PL (1) PL2346363T3 (fr)
WO (1) WO2010029348A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019020370A1 (fr) * 2017-07-25 2019-01-31 Hauni Maschinenbau Gmbh Procédé de production de tabac haché

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2473884A (en) * 2009-09-29 2011-03-30 Dickinson Legg Ltd Cutting apparatus with knife grinder
PL216509B1 (pl) * 2010-11-03 2014-04-30 Int Tobacco Machinery Poland Wysuwany nóż montowany na bębnie krajarki do tytoniu
PL392927A1 (pl) 2010-11-10 2012-05-21 International Tobacco Machinery Poland Spółka Z Ograniczoną Odpowiedzialnością Sposób przygotowania wysuwanego noża montowanego na bębnie krajarki do tytoniu do cięcia włókien o zdefiniowanej długości i nóż przygotowany według sposobu
KR102102381B1 (ko) * 2018-05-31 2020-04-20 (주)네스코바이오 나이프롤러의 커터 재연마장치
KR102299248B1 (ko) * 2019-03-26 2021-09-07 (주)네스코바이오 나이프롤러의 커터가공장치 및 가공방법

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GB711446A (en) * 1952-05-14 1954-06-30 Kurt Koerber Improvements in tobacco cutting machines
DE1197795B (de) * 1959-01-21 1965-07-29 Amf Sasib Soc P Az Scipione In Tabakschneidmaschine
GB969601A (en) * 1959-09-25 1964-09-09 George Smith Improvements in or relating to tobacco-cutting machines
JPS561176Y2 (fr) * 1976-09-17 1981-01-12
JPS5828265A (ja) * 1981-07-23 1983-02-19 エイエムエフ・インコ−ポレ−テツド 積層材料の切断方法および切断装置
DE3344678A1 (de) * 1982-12-23 1984-06-28 Hauni-Werke Körber & Co KG, 2050 Hamburg Tabakschneidermesser
DE3403543A1 (de) * 1983-07-16 1985-01-24 Hauni-Werke Körber & Co KG, 2050 Hamburg Verfahren und vorrichtung zum schleifen eines wellenfoermigen schneidprofils zum schneiden von tabak
US4718198A (en) * 1984-02-02 1988-01-12 Hauni-Werke Korber & Co. Kg. Apparatus for grinding cutting edges of knives in tobacco cutting machines
IT1184339B (it) * 1984-03-14 1987-10-28 Hauni Werke Koerber & Co Kg Dispositivo per affilare i coltelli rotanti di una taglierina per tabacco
GB8409157D0 (en) * 1984-04-09 1984-05-16 Amf Inc Knives in cutting machines
DE10021614A1 (de) * 2000-05-04 2001-11-08 Hauni Maschinenbau Ag Verfahren und Vorrichtung zum automatischen Nachschleifen von Tabakschneidemessern
GB0305607D0 (en) * 2003-03-12 2003-04-16 Garbuio Ltd Tobacco cutting apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010029348A2 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019020370A1 (fr) * 2017-07-25 2019-01-31 Hauni Maschinenbau Gmbh Procédé de production de tabac haché

Also Published As

Publication number Publication date
JP2012501640A (ja) 2012-01-26
CN102196735A (zh) 2011-09-21
WO2010029348A3 (fr) 2010-07-15
EP2346363B1 (fr) 2018-02-28
CN102196735B (zh) 2015-04-01
HUE037314T2 (hu) 2018-08-28
WO2010029348A2 (fr) 2010-03-18
PL2346363T3 (pl) 2018-08-31
GB0816491D0 (en) 2008-10-15
JP5801198B2 (ja) 2015-10-28

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