EP4335757A1 - Verpackungsmaschine und verfahren zur herstellung von verpackungen aus einem verpackungsmaterial - Google Patents

Verpackungsmaschine und verfahren zur herstellung von verpackungen aus einem verpackungsmaterial Download PDF

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Publication number
EP4335757A1
EP4335757A1 EP23194607.0A EP23194607A EP4335757A1 EP 4335757 A1 EP4335757 A1 EP 4335757A1 EP 23194607 A EP23194607 A EP 23194607A EP 4335757 A1 EP4335757 A1 EP 4335757A1
Authority
EP
European Patent Office
Prior art keywords
packaging material
packaging
parameter
edge
unit
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.)
Pending
Application number
EP23194607.0A
Other languages
English (en)
French (fr)
Inventor
Marco MELANDRI
Fabrizio Sighinolfi
Paolo SANIBONDI
Lorenzo MARTINI
Matteo GIANGOLINI
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
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 Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Publication of EP4335757A1 publication Critical patent/EP4335757A1/de
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • B65B41/16—Feeding webs from rolls by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/18—Registering sheets, blanks, or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
    • B65B57/04—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages and operating to control, or to stop, the feed of such material, containers, or packages

Definitions

  • the present invention relates to a packaging machine and a packaging method for producing packages from a packaging material.
  • the invention relates to a packaging machine comprising a control apparatus for detecting parameters of a tube formed by folding the packaging material and filled with a product to be packaged.
  • the invention also relates to a packaging method comprising the step of detecting parameters of a tube formed by folding the packaging material and filled with a product to be packaged.
  • liquid or pourable food products such as for example pasteurized or long-life (UHT) milk, tomato sauce, wine, fruit juice are sold in packages made of sterilized packaging material.
  • UHT pasteurized or long-life
  • Packages of this sort are normally produced with automatic packaging machines, which feed a web of packaging material through a sterilizing unit by means of known guiding elements (like for example rollers) for sterilizing the web of packaging material alternatively by means of chemical sterilization in a sterilizing bath (e.g. by applying a chemical sterilizing agent, such as a hydrogen peroxide solution) or by means of physical sterilization (e.g. by means of an electron beam).
  • a sterilizing bath e.g. by applying a chemical sterilizing agent, such as a hydrogen peroxide solution
  • physical sterilization e.g. by means of an electron beam
  • the packaging machine further comprises a folding unit arranged downstream of the sterilizing unit and arranged for folding the web of packaging material for producing a continuous tube.
  • a folding unit arranged downstream of the sterilizing unit and arranged for folding the web of packaging material for producing a continuous tube.
  • the web of packaging material is folded from a continuous planar shape to a continuous tubular shape with a vertical axis.
  • the web of packaging material with planar shape is folded into a cylinder that is successively subdivided into a plurality of pillow packs which are subjected to successive mechanical folding operations to obtain the finished sealed packages.
  • the folding unit is preferably arranged within a fixed structure in which the web of packaging material is maintained in a sterile-air environment.
  • the folding unit further comprises a number of folding devices placed in succession (one after the other): by interacting with the folding devices, opposite lateral edge portions (or edge regions) of the web of packaging material are placed one on top of the other so as to form the tube and so as to define an overlapping area.
  • the packaging machine comprises a sealing unit arranged downstream of the folding unit for sealing the overlapping edge portions of the web of packaging material to obtain a fluid-tight longitudinal seal in the tube.
  • the tube is continuously filled with the pourable food product through a pour conduit, which partially extends inside the tube and is part of a filling circuit.
  • the tube is finally sent to a forming and transverse sealing unit, where the tube is gripped to transversely seal and cut the tube to form the pillow packs.
  • the tube In the above-described packaging machines, to ensure a good quality of the transverse sealing of the tube of packaging material, the tube must be fed with the overlapping area having a predetermined angular position with respect to the vertical axis and with said overlapping area having a predetermined width.
  • the width of the overlapping area is simply measured manually by an operator through some randomly sampled sealed packages.
  • the object of the invention is to provide a packaging machine for producing packages from a packaging material, said machine not suffering from the drawbacks described above and, in particular, being easy and economical to be manufactured.
  • a further object of the invention is to provide a packaging method for producing packages from a packaging material, said method not suffering from the drawbacks described above and, in particular, being easy and economical to be implemented.
  • Figures 1 and 2 disclose, as a whole, a packaging machine 1 for continuously producing sealed packages, containing a pourable food product, such as for example pasteurized or long-life (UHT) milk, tomato sauce, wine, fruit juice.
  • a pourable food product such as for example pasteurized or long-life (UHT) milk, tomato sauce, wine, fruit juice.
  • UHT pasteurized or long-life
  • the sealed packages are obtained from packaging material unwound off a reel 21 and fed along a conveying path P.
  • the packaging material has the shape of a continuous planar web 20 of packaging material.
  • the packaging material has a multi-layer structure. More specifically, the packaging material may comprise at least a layer of fibrous material, such as e.g. a paper or cardboard layer, and at least two layers of heat-seal plastic material, e.g. polyethylene, interposing the layer of fibrous material in between one another. One of these two layers of heat-seal plastic material may define the inner face of the packages eventually contacting the pourable product.
  • fibrous material such as e.g. a paper or cardboard layer
  • heat-seal plastic material e.g. polyethylene
  • the packaging material may also comprise a layer of gas- and light-barrier material, e.g. aluminum foil or ethylene vinyl alcohol (EVOH) film, in particular being arranged between one of the layers of the heat-seal plastic material and the layer of fibrous material.
  • the packaging material may also comprise a further layer of heat-seal plastic material being interposed between the layer of gas- and light-barrier material and the layer of fibrous material.
  • the packaging machine 1 comprises a sterilizing unit 3 having a sterilizing bath 19, in which a chemical sterilizing agent, such as a hydrogen peroxide solution, is applied to the web 20 of packaging material.
  • a chemical sterilizing agent such as a hydrogen peroxide solution
  • the web 20 of packaging material is fed through the sterilizing unit 3 by means of known guiding elements (like for example rollers or similar elements).
  • the packaging machine 1 further comprises a folding unit 4 arranged downstream of the sterilizing unit 3 along the conveying path P.
  • the folding unit 4 extends, preferably substantially vertically, along the conveying path P for producing a continuous tube 5.
  • the web 20 of packaging material is folded from a continuous planar shape to a continuous tubular shape with a longitudinal axis Y.
  • the longitudinal axis Y is arranged along a vertical direction.
  • the folding unit 4 is defined within a fixed structure 6 in which the web 20 of packaging material is maintained in a sterile-air environment.
  • the folding unit 4 further comprises a number of folding devices 100 placed along the conveying path P in succession (one after the other), each of said folding devices 100 comprising a number of folding rollers cooperating to fold the web 20 of packaging material.
  • the packaging machine 1 comprises a sealing unit 7 (of the known type and not described in detail) for sealing overlapping lateral edges 13A, 13B of the packaging material to obtain a fluid-tight longitudinal seal in the tube 5.
  • the tube 5 is continuously filled with the pourable food product through a pour conduit 101, which partially extends inside the tube 5 and is part of a filling circuit.
  • the tube 5 is sent to a forming and transverse sealing unit (not shown), in which the tube 5 is gripped to transversely seal the tube and form pillow packs 2. Finally, the pillow packs 2 are subjected to successive mechanical folding operations to obtain the finished sealed packages.
  • the packaging machine 1 comprises a control apparatus 8 configured for measuring and controlling the angular position T of the edge 13B with respect to the longitudinal axis Y (i.e. the rotation or twisting of the tube 5 around the longitudinal axis Y) and/or a width of an overlapping area AO defined by the portions of the packaging material edge 13A and the packaging material edge 13B that overlap each other.
  • a control apparatus 8 configured for measuring and controlling the angular position T of the edge 13B with respect to the longitudinal axis Y (i.e. the rotation or twisting of the tube 5 around the longitudinal axis Y) and/or a width of an overlapping area AO defined by the portions of the packaging material edge 13A and the packaging material edge 13B that overlap each other.
  • the web 20 of packaging material comprises a plurality of patterns 12 of reference marks, which are arranged one after the other along the longitudinal dimension of the web 20 of packaging material (and of the tube 5) to provide information on the position of the packaging material.
  • Each pattern 12 of reference marks defines, or is part of, a packaging material unit 13 intended to form a respective sealed package.
  • Figure 4 discloses a first embodiment of a pattern 12 of reference marks.
  • the pattern 12 of reference marks comprises at least two reference marks 14, 15.
  • the reference marks 14, 15 are dedicated marks, with a substantially square shape.
  • the reference marks 14, 15 could be already existing marks (such as, for example, splice marks or barcodes or similar).
  • the reference mark 14 is arranged in proximity of the packaging material edge 13A.
  • the reference mark 14 has a reference zone 14A, for example an edge zone, facing edge 13A.
  • a distance D 1 is defined between the packaging material edge 13A and the reference zone 14A. Said distance D 1 is different from zero.
  • the reference mark 15 is arranged in proximity of a packaging material edge 13B.
  • reference mark 15 has a reference zone 15B, preferably corresponding to the packaging material edge 13B.
  • the second edge 13A may comprise a portion of the packaging material between the border of the second edge 13A and the reference mark 14.
  • the first edge 13B of the packaging material may be at least partially placed on top of the second edge 13A, i.e. an (outer) border of the edge 13B of the packaging material may be placed on top of the second edge 13A.
  • the control apparatus 8 comprises a sensing device 17 having at least a sensor 18.
  • the sensor 18 is adapted to frame a longitudinal portion of the web 20 of packaging material.
  • the longitudinal portion of the web 20 of packaging material framed by sensor 18 comprises a packaging material unit 13.
  • the longitudinal portion of the web 20 of packaging material framed by sensor 18 corresponds to a packaging material unit 13.
  • the sensor 18 is preferably a camera 18A.
  • the sensing device 17 is configured for measuring the distance D 1 of each packaging material unit 13 when the packaging material has a planar shape.
  • the sensing device 17 is arranged along the conveying path P.
  • the sensing device 17 is arranged upstream of the sterilizing unit 3.
  • the control apparatus 8 further comprises an imaging device 9, disclosed in Figure 3 .
  • the control apparatus 8 further comprises a fixed frame having a movable bracket (not shown) supporting the imaging device 9.
  • the movable bracket is rotatable around an axis between a working position, in which the imaging device 9 faces the tube 5 and is arranged in proximity of the tube 5, and a rest position, in which the imaging device 9 does not faces the tube 5 and is arranged at a distance from the tube 5.
  • the imaging device 9 comprises at least a sensor 11, adapted to frame at least a longitudinal portion of the tube 5.
  • Sensor 11 is preferably a camera 11A.
  • the imaging device 9 is arranged downstream of the sealing unit 7.
  • the sensor 11, i.e. the camera 11A is adapted to frame a longitudinal portion of the tube 5.
  • the longitudinal portion of the tube 5 framed by sensor 11 comprises a packaging material unit 13.
  • the longitudinal portion of the web 20 of packaging material framed by sensor 18 corresponds to a packaging material unit 13.
  • the packaging material edge 13B at least partially overlaps the packaging material edge 13A defining the overlapping area AO formed by overlapping lateral portions of the packaging material.
  • a reference value of a width of the overlapping area AO is defined.
  • the reference value is a preferred value, or an optimal value, corresponding to a correct working condition of the packaging machine 1. It is important to notice that the distance D 1 has to be chosen (when printing the mark 14 on the packaging material) so that it is greater than said reference value.
  • a distance D 2 is defined between the reference zone 15B (that, in the embodiment shown, corresponds to the packaging material edge 13B), and the reference zone 14A.
  • the distance D 2 is measured when the web 20 of packaging material has the (e.g. substantially) tubular shape, as disclosed in Figure 5 .
  • the distance D 2 is measured by the imaging device 9, particularly for each packaging material unit 13.
  • control apparatus 8 comprises a control unit 16 which is connected to both the imaging device 9 and the sensing device 17.
  • the imaging device 9 is designed for generating and transmitting to the control unit 16 a signal indicating the distance D 2 of each packaging material unit 13.
  • the sensing device 17 is instead designed for generating and transmitting to the control unit 16 a signal indicating the distance D 1 of each packaging material unit 13.
  • the control unit 16 calculates an actual value of the overlapping area AO through the difference between the distance D 1 and the distance D 2 of each packaging material unit 13.
  • the control unit 16 further compares the actual value of the overlapping area AO with the reference value. In case the difference between the actual value of the overlapping area AO and the reference value exceeds a predefined threshold the control unit 16 is designed to generate a warning signal for informing of an undesired and significant deviation from the reference value.
  • control unit 16 is realized for controlling the folding unit 4 and the sealing unit 7 based on the actual value of the overlapping area AO.
  • the pattern 12 of reference mark comprises the reference mark 14 as described above and the reference mark 15 is the packaging material edge 13B.
  • the pattern 12 of reference mark does not comprise a dedicated reference mark 15 but the reference mark 15 is defined by the packaging material edge 13B.
  • the distance D 2 measured by the imaging device 9 is defined between the packaging material edge 13B and the reference zone 14A.
  • Figures 6 and 7 disclose a second embodiment of a pattern 12 of reference marks.
  • the pattern 12 of reference marks comprises at least two reference marks 14*, 15*.
  • the reference marks 14*, 15* are already existing marks (such as, for example, splice marks or barcodes or similar).
  • the reference marks 14*, 15* could be dedicated marks.
  • the reference mark 14* is arranged in proximity of the packaging material edge 13A and the reference mark 15* is arranged in proximity of the packaging material edge 13B.
  • the first edge 13B may comprise the portion of the packaging material between the border of the first edge 13B and the reference mark 15*.
  • the second edge 13A may comprise the portion of the packaging material between the border of the second edge 13A and the reference mark 14*.
  • the (outer) border of the edge 13B of the packaging material may be placed on top of the second edge 13A.
  • the senor 18 is a camera 18A or alternatively a through-beam sensor 18, preferably a through-beam laser sensor 18.
  • the sensing device 17 is configured for measuring the width V of each packaging material unit 13 when the packaging material has a planar shape, i.e. the width from the packaging material edge 13A to the packaging material edge 13B of the web 20 of packaging material.
  • the producer of the web 20 of packaging material provides information about the packaging material, such as for example a distance D 3 between the reference marks 14*, 15*. More in detail, the producer of the web 20 of packaging material provides the distance D 3 defined between a reference point 14A* of the reference mark 14* and a reference point 15A*, in particular an edge, of the reference mark 15*.
  • the distance D 3 has, therefore, a pre-defined value that is stored in the control unit 16.
  • the imaging device 9 is configured for measuring a distance D 4 between the reference mark 14* and the reference mark 15*, e.g. when the packaging material is folded into the (e.g. substantially) tubular shape. More in detail, the distance D 4 is defined between the reference point 15A* of the reference mark 15* and the reference point 14A* of the reference mark 14* of the tube 5.
  • the imaging device 9 is designed for generating and transmitting to the control unit 16 a signal indicating the distance D 4 of each packaging material unit 13.
  • the control unit 16 then calculates the overall perimeter of each packaging material unit 13 by adding the distance D 3 to the distance D 4 .
  • the control unit 16 calculates the actual value of the overlapping area AO through the difference between the width V and the overall perimeter of each packaging material unit 13, obtained as explained above.
  • control unit 16 is designed to generate a warning signal for informing of an undesired and significant deviation from the reference value.
  • the control unit 16 is realized for using the actual value of the overlapping area AO for a closed loop control of the folding unit 4 and/or the sealing unit 7.
  • each packaging material unit 13 provided by the imaging device 9 is used for measuring the angular position T of the packaging material edge 13B being formed with respect to the longitudinal axis Y, which represents the rotation or twisting of the tube 5 around the longitudinal axis Y.
  • the camera 11A is adapted to continuously acquire images of at least a longitudinal portion of the tube 5 and a reference marker (not shown).
  • the camera 11A is adapted to frame a longitudinal portion of the tube 5 and the reference marker.
  • the reference marker is connected to a frame of the packaging machine 1 and, therefore, is arranged in a fixed position with respect to the tube 5 advancing along the advancement path P.
  • the reference marker is defined by a slit in a bracket connected to the frame of the packaging machine 1.
  • the control unit 16 For each image acquired by camera 11A, the control unit 16 is configured for measuring the angular position T of the packaging material edge 13B with respect to the longitudinal axis Y based on the position of said packaging material edge 13B with respect to the reference marker. In particular, the control unit 16 is configured for measuring the angular position T of the packaging material edge 13B with respect to the longitudinal axis Y based on the distance of said packaging material edge 13B from the reference marker.
  • control unit 16 is configured for measuring the angular position T of the packaging material edge 13B with respect to the longitudinal axis Y based on the position of a (outer) border of said packaging material edge 13B with respect to the reference marker.
  • the camera 11A is adapted to acquire a reference image in a preliminary set-up phase.
  • the reference image comprises at least a longitudinal portion of the tube 5 and a movable reference marker.
  • the reference marker is connected to a frame of the packaging machine 1.
  • the reference marker is defined by a slit in a bracket connected in a removable manner to the frame of the packaging machine 1.
  • the control unit 16 is configured for comparing the image provided by the imaging device 9 with the reference image.
  • the control unit 16 is configured for measuring the angular position T of the packaging material edge 13B with respect to the longitudinal axis Y based on the displacement of the packaging material edge 13B with respect to a reference position of the packaging material edge 13B in the reference image.
  • the evaluation of the correct positioning of the packaging material edge 13B allows the users to determine whether the tube 5 being formed is arranged in a correct position with respect to the longitudinal axis Y.
  • the control unit 16 is indeed realized for controlling the folding unit 4 and the sealing unit 7 based on the angular position T of the packaging material edge 13B.
  • control unit 16 is designed to generate a warning signal for informing of an undesired and significant deviation.
  • control unit 16 is configured for using the angular position T of the packaging material edge 13B for a closed loop control of the folding unit 4 and/or the sealing unit 7.
  • control apparatus 8 can measure and control both the actual value of the overlapping area AO and the twisting of the tube 5 around the longitudinal axis Y.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
EP23194607.0A 2022-09-08 2023-08-31 Verpackungsmaschine und verfahren zur herstellung von verpackungen aus einem verpackungsmaterial Pending EP4335757A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22194574 2022-09-08

Publications (1)

Publication Number Publication Date
EP4335757A1 true EP4335757A1 (de) 2024-03-13

Family

ID=83271206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23194607.0A Pending EP4335757A1 (de) 2022-09-08 2023-08-31 Verpackungsmaschine und verfahren zur herstellung von verpackungen aus einem verpackungsmaterial

Country Status (2)

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EP (1) EP4335757A1 (de)
WO (1) WO2024052208A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6751925B1 (en) * 1999-07-07 2004-06-22 Tetra Laval Holdings & Finance, S.A. Filling machine
US20140274629A1 (en) * 2013-03-15 2014-09-18 The Iams Company Method and Apparatus for Performing Multiple Tasks on a Web of Material
US20180016047A1 (en) * 2015-01-15 2018-01-18 Ishida Co., Ltd. Bag making and packaging machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6751925B1 (en) * 1999-07-07 2004-06-22 Tetra Laval Holdings & Finance, S.A. Filling machine
US20140274629A1 (en) * 2013-03-15 2014-09-18 The Iams Company Method and Apparatus for Performing Multiple Tasks on a Web of Material
US20180016047A1 (en) * 2015-01-15 2018-01-18 Ishida Co., Ltd. Bag making and packaging machine

Also Published As

Publication number Publication date
WO2024052208A1 (en) 2024-03-14

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