EP3243614A1 - Schneideinheit für eine etikettiermaschine - Google Patents

Schneideinheit für eine etikettiermaschine Download PDF

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Publication number
EP3243614A1
EP3243614A1 EP16305535.3A EP16305535A EP3243614A1 EP 3243614 A1 EP3243614 A1 EP 3243614A1 EP 16305535 A EP16305535 A EP 16305535A EP 3243614 A1 EP3243614 A1 EP 3243614A1
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EP
European Patent Office
Prior art keywords
cutting
stationary blade
blade
cutting unit
rotary
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
EP16305535.3A
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English (en)
French (fr)
Other versions
EP3243614B1 (de
Inventor
James Carmichael
Mattia Giuliani
Michele Montanari
Sergio TRAPASSO
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.)
Sidel Participations SAS
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Sidel Participations SAS
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Publication date
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Priority to EP16305535.3A priority Critical patent/EP3243614B1/de
Publication of EP3243614A1 publication Critical patent/EP3243614A1/de
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Publication of EP3243614B1 publication Critical patent/EP3243614B1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/38—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member
    • B26D1/385—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member

Definitions

  • the present invention relates to a cutting unit for labelling machines, particularly for the type of labelling machines comprising a reel from which a web of labelling material is cut into lengths (labels) of a predetermined size and applied on articles, namely on containers filled with a pourable product.
  • Known labelling machines of the above-mentioned type basically comprise a carousel for advancing the articles along an article path towards a labelling station, and a labelling unit fed with a web of labelling material, progressively advancing such web along a label path towards the labelling station as well as cutting the web itself into a plurality of labels to be applied onto the articles moving along the article path.
  • the labelling unit comprises:
  • a layer of adhesive is typically applied on its surface for subsequently securing it to the surface of one respective article being fed to the labelling station.
  • the labels are transferred from the cutting unit in order to be wound about rotating mandrels carried by a carousel for forming tubular lengths of labelling material which shall subsequently be applied on the articles.
  • Known cutting units typically comprise:
  • Both the stationary and rotary blades are arranged adjacent to the vacuum drum.
  • the web of labelling material is advanced between the stationary and the rotary blades of the cutting unit, the leading edge of the web being picked, by suction, by the vacuum drum.
  • the vacuum drum is typically driven to rotate at a speed higher than the speed at which the web of labelling material is advanced along the label path, whereby the vacuum drum applies a pulling force on the leading edge of the web.
  • the rotary blade becomes opposed to the stationary blade, the web is cut.
  • the applicant has observed that, in order to achieve a proper cut of the web of labelling material as well as to safeguard the life of the blades, it is preferable to maintain the stationary blade very close to the rotary blade at the cutting position without any interference between them; in other words, the minimum gap compatible with the performance of a proper cutting action on the web of labelling material should be established and maintained between the stationary blade and the rotary blade at the cutting position.
  • the web of labelling material (generally a thin, polymeric film) is weakened along the cutting line and the label is "torn" off the rest of the web by means of the pulling force applied by the vacuum drum.
  • a working cycle with a first type of web only engaging a portion of the height of the stationary blade may produce different levels of wear on different zones of the blade itself (the working zone may be subjected to a higher wear than the non-working zone); in a subsequent working cycle with a higher web engaging the whole height of the stationary blade, the cutting action may be negatively affected by the non-uniform wear of the stationary blade itself.
  • the gap between the stationary blade and the rotary blade can change during the operation, due to the inevitable wear of the blades.
  • An increase or decrease in such gap of one or two micrometres may result in a big difference in the quality of the cutting.
  • Number 1 in Figures 1 to 3 indicates as a whole a cutting unit according to the present invention for cutting material from a web, in particular labels 2 from a web 3 of labelling material.
  • Cutting unit 1 is adapted to be incorporated into a labelling machine (known per se and not shown), especially into a roll-fed labelling machine for applying labels 2 to relative articles, in particular containers (known per se and not shown) filled with a pourable product.
  • the roll-fed labelling machine substantially comprises:
  • the labelling unit comprises:
  • Cutting unit 1 cuts labels 2 from web 3 and conveys them towards the carousel.
  • cutting unit 1 substantially comprises:
  • Axis B of rotary drum 6 is parallel to the axis of vacuum drum D; rotary drum 6 and vacuum drum D are substantially arranged tangential to one another to allow transfer of the cut labels 2 from the rotary drum 6 to the vacuum drum D.
  • rotary drum 6 comprises a central shaft 9 supported in a rotating manner about its axis B by a fixed frame 10 through a pair of bearings 11, in particular rolling bearings, and a cylindrical annular main body 12, coaxially coupled onto shaft 9 and delimited by lateral surface 7.
  • rotary blade 8 outwardly protrudes slightly from lateral surface 7 of rotary drum 6 and is provided with a cutting edge 15 ( Figures 7 to 11 ) extending parallel to axis B.
  • rotary drum 6 may also comprise two or more rotary blades 8 equally spaced angularly about axis B.
  • axis of rotary drum 6 extends orthogonally to path A followed by web 3 at the cutting position.
  • support structure 5 comprises a vertical prismatic block 16 arranged in a position facing lateral surface 7 of rotary drum 6 and carrying stationary blade 4 on one of its sides.
  • stationary blade 4 is defined by a plate having two opposite and parallel flat lateral faces 17, 18, one of which rests, in use, on a relative side of block 16; stationary blade 4 also includes a front wedge-shaped cutting portion 19, protruding from block 16 towards rotary drum 6, and a flat back surface 20 opposite the cutting edge 19. In the particular example shown, back surface 20 abuts against a flange 21 outwardly protruding from the side of block 16 on which stationary blade 4 is arranged.
  • Cutting portion 19 of stationary blade 4 has a linear and vertical cutting edge 22 (see in particular Figures 7 to 11 ) extending parallel to axis B of rotary drum 6 and to cutting edge 15 of rotary blade 8.
  • block 16 has an internal cavity 23, which opens at a side of the block 16 itself, opposite the rotary drum 6, and is closed by a cover plate 24 secured to said block 16.
  • This specific arrangement permits to amplify, in use, the vibrations generated on stationary blade 4 by rotation of the rotary drum 6; the aim of this amplification will be clarified later on.
  • Stationary blade 4 and lateral surface 7 of rotary drum 6 define a passage 25 for web 3; at cutting position, i.e. where rotary blade 8 faces stationary blade 4, the passage 25 reaches a minimum value set to allow a cutting action on the web 3.
  • cutting unit 1 further comprises:
  • actuator means 27 are configured to produce micrometric displacements of stationary blade 4 towards or away from rotary drum 6.
  • Cutting unit also comprises ( Figure 3 ) a control unit 28 connected to sensor means 26 and to actuator means 27 and configured to control activation of the actuator means 27 so as to maintain the detected quantity R within a given threshold range Ro corresponding to a given air gap range between cutting edge 22 of stationary blade 4 and cutting edge 15 of rotary blade 8 at the cutting position (see in particular Figures 7 and 8 ).
  • Cutting unit 1 also comprises a temperature sensor 29 arranged on stationary blade 4 and connected to control unit 28.
  • sensor means 26 comprise two sensors 30 detecting the quantity R at distinct zones 22a, 22b of cutting edge 22 of stationary blade 4 to give distinct measures of the distances between cutting edge 15 of rotary blade 8 and the zones 22a, 22b of the cutting edge 22 itself.
  • zones 22a, 22b are defined by the opposite end portions of cutting edge 22 stationary blade 4.
  • sensor means 26 may even comprise more than two sensors 30.
  • quantity R is the acceleration of the vibrations transmitted by stationary blade 4 to block 16 during rotation of rotary drum 4.
  • sensors 30 are accelerometers mounted on portions 31 of block 16 adjacent to zones 22a, 22b of cutting edge 22 of stationary blade 4.
  • each sensor 30 detects the acceleration of the vibrations transmitted by the corresponding zone 22a, 22b of cutting edge 22 of stationary blade 4 to block 16 during rotation of rotary drum 6; such accelerations reach respective peaks at cutting position (see for example the diagrams of Figures 4 to 6 ).
  • each sensor 30 when the peaks detected by each sensor 30 are comprised within the threshold range R 0 , corresponding to a given threshold air gap between cutting edge 15 of rotary blade 8 and the respective zone 22a, 22b of cutting edge 22 of stationary blade 4, the cutting operation is performed in the desired or optimal conditions.
  • the diagram of Figure 4 shows the desired condition, wherein the peaks of acceleration are contained within the prescribed threshold range R 0 .
  • FIG. 5 shows a condition, wherein, at a certain point, the peaks of acceleration start to be out of the prescribed threshold range R 0 , i.e. they start to exceed the upper limit of such range. Activation of actuator means 27 by control unit 28 permits to restore the correct condition.
  • FIG. 6 shows a further condition, wherein some of the peaks are within the threshold range Ro and others are out of such range; there is no repeatability of the values detected.
  • this condition corresponds to a failure of bearings 11, which should be replaced.
  • control unit 28 generates a warning signal and the cutting unit 1 has to be stopped to permit replacement of bearings 11.
  • control unit 28 is configured to generate a warning signal as the quantity R detected by one of the sensors 30 shows no repeatability in a given time interval corresponding to a given plurality of turns of rotary drum 6.
  • Figures 7 and 8 show an example of correct air gap between cutting edge 15 of rotary blade 8 and cutting edge 22 of stationary blade 4 at cutting position; the applicant has observed that such gap has to be comprised between 0 and 2 micrometers.
  • Figures 9 and 10 show an example wherein there is interference of some micrometers between cutting edge 15 of rotary blade 8 and cutting edge 22 of stationary blade 4 at cutting position; this situation should be corrected to avoid excessive wear of stationary blade 4 and subsequently a non-correct cutting action on the web 3 of labelling material.
  • Figure 11 shows a typical situation of failure of bearings 11; the air gap between cutting edge 15 of rotary blade 8 and cutting edge 22 of stationary blade 4 at cutting position continuously varies.
  • actuator means 27 preferably comprise a plurality of independent actuator members 31 configured to produce independent micrometric displacements of respective areas 22c of cutting edge 22 of stationary blade 4.
  • areas 22c may be distinct from zones 22a, 22b and/or even coincide with the latter.
  • Actuator members 31 are configured to adjust the position of the respective areas 22c of cutting edge 22 of stationary blade 4 by direct deformation of the stationary blade 4 itself and/or by deformation of corresponding portions of flange 21 of block 16 directly contacting the stationary blade 4.
  • actuator members 31 are linear actuators, in particular screw actuators, externally supported by block 16 and each having an output element 32 directly cooperating with a side of flange 21 opposite the one contacting back surface 20 of stationary blade 4.
  • the micrometric displacements of each area 22c of stationary blade 4 are obtained as a result of corresponding deformations produced by the respective actuator member 31 on the portion of flange 21 adjacent to said area 22c.
  • cutting unit 1 The operation of cutting unit 1 is described starting from a configuration, in which cutting edge 15 of rotary blade 8 is in the cutting area.
  • Web 3 is unwound from label reel and advanced along path A by the motorized roll.
  • Web 3 is taken up at its end by suction by vacuum drum D, and advanced within passage 25 which is defined, on its opposite sides, by cutting edge 22 of stationary blade 4 and lateral surface 7 of rotary drum 6.
  • rotary blade 8 Due to the rotation of rotary drum 6 about axis B, at a certain time, rotary blade 8 faces cutting edge 22 of stationary blade 4 reaching the cutting position ( Figures 2 , 7 and 8 ), in which rotary blade 4 closes passage 25 so as to leave a minimum air gap.
  • one label 2 is cut from the remaining part of web 3 by the actions of cutting edges 15, 22 of rotary and stationary blades 8, 4.
  • Sensors 30 continuously detect quantity R, in the example shown the acceleration of the vibrations produced on block 16 by stationary blade 4 during rotation of rotary drum 6; when the peaks of the detected quantity R by one of sensors 30 exceeds the threshold range Ro (as for instance in the conditions of Figures 5 , 9 and 10 ), control unit 28 activates one or more actuator members 31 to produce given displacements of stationary blade 4 at the areas 22c of cutting edge 22 involved in such detection.
  • control unit 28 activates the actuator members 31 to maintain the air gap between cutting edge 15 of rotary blade 8 and cutting edge 22 of stationary blade 4 within the desired threshold range.
  • control unit 28 If the detected quantity R results in a plurality of peaks having different and not repeatable values, such as shown in the diagram of Figure 6 , control unit 28 generates a warning signal indicating a possible failure of bearings 11, which have to be replaced.
  • Each cut label 2 is conveyed by the suction action of vacuum drum D towards the carrousel where it is applied onto a relative article by the labelling group.
  • number 1' indicates as a whole a different embodiment of a cutting unit according to the present invention; as cutting unit 1' is similar to cutting unit 1, the following description is limited to the differences between them, by using the same references, where possible, for identical or corresponding parts.
  • cutting unit 1' basically differs from cutting unit 1 by using piezoelectric actuator members 31' instead of linear actuator member 31.
  • piezoelectric actuator members 31' directly act on back surface 20 - which preferably has an arcuate profile - of stationary blade 4.
  • piezoelectric actuator members 31' may also act on a portion of support structure 5 directly contacting the stationary blade 4.
  • Each piezoelectric actuator member 31' can be selectively deformed under a control voltage signal CVS generated by control unit 28 and selectively transmits its deformations to stationary blade 4 so as to produce corresponding displacements of the respective area 22c of cutting edge 22 of the stationary blade 4 itself towards or away from rotary drum 6.
  • Each piezoelectric actuator member 31' is advantageously used as "sensor means” since it selectively transforms impacts of stationary and rotary blades 4, 8 on web 3 into corresponding detected-voltage values DVV correlated to the distance or interference between the stationary and rotary blades 4, 8 themselves at both the cutting position and the respective area 22c of cutting edge 22 on which said piezoelectric actuator member 31' operates.
  • the detected-voltage values DVV are transmitted from each piezoelectric actuator member 31' to control unit 28 as a detected-voltage signal DVS; control unit 28 generates a respective control voltage signal CVS for each piezoelectric actuator member 31' as a function of the detected-voltage signal DVS generated in use by the same piezoelectric actuator member 31'.
  • control unit 28 of cutting unit 1' is configured to generate a warning signal as the detected-voltage values DVV associated to one or more specific piezoelectric actuator members 31' show no repeatability in a given time interval corresponding to a given plurality of turns of rotary drum 6.
  • support structure 5 has no internal cavity to amplify vibrations generated on stationary blade 4 by rotation of the rotary drum 6, as piezoelectric actuator members 31' do not detect accelerations of vibrations.
  • This kind of control also applies during the initial transitory time following the start-up of the cutting unit 1, wherein the temperatures of the stationary and rotary blades 4, 8 are lower than the target ones; in this way, any interference between the blades 4, 8 and any consequent undesired wear thereof during this step are avoided.
  • the proposed solution also permits to avoid possible problems of non-uniform wear or degradation of the stationary blade 4 due to the use of webs 3 of different heights.
  • the control unit 28 to detect whether a web 3 extending along only part of the entire height of the cutting edge 22 is used and to control the actuator members 31, 31' in such a way to take into account of this.
  • the proposed solution permits to detect possible failures of bearings 11.
  • each cutting unit 1, 1' may also comprise one single actuator member 31, 31' acting on stationary blade 4.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)
  • Treatment Of Fiber Materials (AREA)
EP16305535.3A 2016-05-09 2016-05-09 Schneideinheit für eine etikettiermaschine Active EP3243614B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16305535.3A EP3243614B1 (de) 2016-05-09 2016-05-09 Schneideinheit für eine etikettiermaschine

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Application Number Priority Date Filing Date Title
EP16305535.3A EP3243614B1 (de) 2016-05-09 2016-05-09 Schneideinheit für eine etikettiermaschine

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EP3243614A1 true EP3243614A1 (de) 2017-11-15
EP3243614B1 EP3243614B1 (de) 2019-10-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019239283A1 (en) * 2018-06-15 2019-12-19 Fabio Perini S.P.A. Device with rotating blades, machine comprising said device, and related method
DE102018127852A1 (de) * 2018-11-08 2020-05-14 Khs Gmbh Schneidwerk für ein Etikettieraggregat sowie Etikettieraggregat mit einem solchen Schneidwerk
US20220024062A1 (en) * 2018-11-28 2022-01-27 Fabio Perini S.P.A. Perforating device and converting machine comprising said device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782853A (en) * 1955-08-08 1957-02-26 American Viscose Corp Precision fiber cutter
EP0319894A2 (de) * 1987-12-09 1989-06-14 Valmet-Ahlstrom Inc. Verfahren und Vorrichtung zur Schneidspalteinstellung in Bandschneideanlagen
DE19813121C1 (de) * 1998-03-25 1999-10-28 Kuesters Eduard Maschf Vorrichtung zum Bearbeiten einer Materialbahn mit Ultraschall
DE19933497A1 (de) * 1999-07-16 2001-01-18 Rieter Automatik Gmbh Vorrichtung zur Schneidspalteinstellung und Verfahren
WO2011095228A1 (en) * 2010-02-08 2011-08-11 Sca Hygiene Products Ab Apparatus and method for treating products

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782853A (en) * 1955-08-08 1957-02-26 American Viscose Corp Precision fiber cutter
EP0319894A2 (de) * 1987-12-09 1989-06-14 Valmet-Ahlstrom Inc. Verfahren und Vorrichtung zur Schneidspalteinstellung in Bandschneideanlagen
DE19813121C1 (de) * 1998-03-25 1999-10-28 Kuesters Eduard Maschf Vorrichtung zum Bearbeiten einer Materialbahn mit Ultraschall
DE19933497A1 (de) * 1999-07-16 2001-01-18 Rieter Automatik Gmbh Vorrichtung zur Schneidspalteinstellung und Verfahren
WO2011095228A1 (en) * 2010-02-08 2011-08-11 Sca Hygiene Products Ab Apparatus and method for treating products

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019239283A1 (en) * 2018-06-15 2019-12-19 Fabio Perini S.P.A. Device with rotating blades, machine comprising said device, and related method
US20210252728A1 (en) * 2018-06-15 2021-08-19 Fabio Perini S.P.A. Device with rotating blades, machine comprising said device, and related method
DE102018127852A1 (de) * 2018-11-08 2020-05-14 Khs Gmbh Schneidwerk für ein Etikettieraggregat sowie Etikettieraggregat mit einem solchen Schneidwerk
US11613037B2 (en) * 2018-11-08 2023-03-28 Khs Gmbh Cutting unit for a labeling device, and labeling device having such a cutting unit
US20220024062A1 (en) * 2018-11-28 2022-01-27 Fabio Perini S.P.A. Perforating device and converting machine comprising said device

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