EP4559824A1 - Machine d'emballage - Google Patents

Machine d'emballage Download PDF

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Publication number
EP4559824A1
EP4559824A1 EP24205292.6A EP24205292A EP4559824A1 EP 4559824 A1 EP4559824 A1 EP 4559824A1 EP 24205292 A EP24205292 A EP 24205292A EP 4559824 A1 EP4559824 A1 EP 4559824A1
Authority
EP
European Patent Office
Prior art keywords
packaging
unit
sealing
machine
casing
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
EP24205292.6A
Other languages
German (de)
English (en)
Inventor
Paolo Fioravanti
Luca PIANEGONDA
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.)
PFM SpA
Original Assignee
PFM SpA
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 PFM SpA filed Critical PFM SpA
Publication of EP4559824A1 publication Critical patent/EP4559824A1/fr
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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/16—Applying or generating heat or pressure or combinations thereof by rotary members
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/04—Applying separate sealing or securing members, e.g. clips
    • B65B51/08—Applying binding material, e.g. to twisted bag necks
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/306—Counter-rotating devices
    • 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
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • 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
    • B65B9/207—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 the web advancing continuously

Definitions

  • the present invention relates to a packaging machine, in particular intended to make sealed packages, for example pouches, bags or the like, automatically.
  • the machine according to the invention is advantageously inserted in the field of production and marketing of machines, plants and automatic packaging lines, for example of the vertical type ("VFFS - Vertical Form Fill and Seal”), intended to make a plurality of sealed packages, in particular by means of a flexible film, for example made of a polymeric material, and for wrapping a predefined quantity of product, both of the food and non-food type.
  • VFFS Vertical Form Fill and Seal
  • the machine according to the invention finds particular and specific application in the manufacture of packages equipped with at least one flexible band called "clip” or “clip-band” in the technical jargon of the sector, and intended to make a neck to close each package.
  • Packaging machines for packaging products, for example of the type mentioned above, in packages of multiple types, for example of the pillow type or packages with bellows or others is known, in the technical field of reference.
  • Packaging machines of the known type typically comprise a packaging unit, configured to seal the flaps of a casing of film that has been previously shaped, for example by means of a forming unit, and to cut the aforementioned flaps in such a way as to make a sealed package.
  • such machines may comprise a closing unit, referred to with the term “clipping unit” in the technical jargon of the sector, and designed to affix at least one flexible strip or band around each sealed package in such a way as to create a constriction neck on the package itself.
  • a closing unit referred to with the term “clipping unit” in the technical jargon of the sector, and designed to affix at least one flexible strip or band around each sealed package in such a way as to create a constriction neck on the package itself.
  • the main drawback lies in the fact that the packaging machines of known type have low production speeds, or at least they are not able to meet the current production speeds of the relevant industrial sector. In fact, such machines have packaging production speeds typically not exceeding about 30-35 packages per minute. These values are therefore not suitable for the achievement of high production volumes.
  • a further drawback lies in the fact that the packaging machines of known type are operationally inflexible. In fact, these machines do not allow to easily and quickly switch from a package with a predefined format (e.g. 200 grams of product) to another package having a different format (e.g. 400 grams).
  • a further drawback lies in the fact that the packaging machines of known type have poor stability of the packaging material (i.e. of the flexible film) during their operation. More specifically, the packaging material tends to create creases and skids, and more generally not to remain well stretched and correctly tensioned by the functional units in charge mentioned above during the operation of the packaging machine of known type. In fact, this machine performs an operating cycle that provides for at least one step of stopping the movement of the film before sealing thereof and a subsequent restart after sealing has taken place. This creates skids and creases, as described above, of the packaging film with potential risks regarding the final quality of the sealed package.
  • the object of the present invention is to provide a packaging machine that makes it possible to obviate and remedy, at least in part, the drawbacks of the aforementioned prior art.
  • a further object of the present invention is to provide a packaging machine that allows to achieve a high packaging speed, in particular of the order of 55-60 packages per minute, or at least higher than that of the packaging machines of known type.
  • a further object of the present invention is to provide a packaging machine that is structurally stable and reliable during its operation.
  • a further object of the present invention is to provide a packaging machine that has an improved and/or alternative configuration, both in terms of construction and function, compared to the traditional known solutions.
  • Document IT 202200001376 A1 discloses a vertical packaging machine provided with a vertical forming tube wrapped by a film which is configured to advance by descending downwards, pushed by special conveyors and welded in a longitudinal direction, reaching a tubular conformation and initially open at the two ends, i.e. at the lower one and at the upper one from where it comes, wherein arranged below the end of the forming tube there are units for hot sealing, crimping and cutting bags that are formed during the continuous downward advancement of the film, whilst once the lower edge is sealed, a product to be packaged and possibly a liquid preservative thereof is dropped from inside the forming tube.
  • the packaging machine comprises, in vertical succession from top to bottom: a welding and cutting unit; a first mobile vertical carriage; a second mobile vertical carriage; a third vertical carriage provided with a support for a vertical guid slidingly inserted in said support of the mobile vertical carriage and parallel to the shaft; a mobile creasing device on a horizontal carriage associated with said third carriage by means of a guide, sliding horizontally and disposed orthogonally relative to said parallel shafts.
  • Said first and second vertical carriages which carry the welding bars and the accessories thereof, intended for packing bags with a tie, are mobile and adjustable, i.e. mounted on guides that enable adjustment of the distances that lie, respectively, between an upper edge and a constriction of the tie and between the upper and lower edges of the package.
  • a packaging machine subject-matter of the present invention, in particular intended to seal and cut, and then seal, packages of various types, for example pouches and/or bags, automatically, has been indicated as a whole with number 10.
  • packaging machine shall therefore mean, for the purposes of this description, an apparatus, a plant, a line or any other automatic packaging system.
  • VFFS vertical type packaging machine
  • any packaging machine for example horizontal one, without thereby leaving the scope of protection.
  • packing material shall mean, for the purposes of this description, a flexible film having a dimension of its thickness that is much smaller, in particular substantially negligible, than the dimensions of its length and width, and adapted to be shaped (e.g. folded) in such a way as to form a package.
  • the packaging machine comprises a support structure 11, configured to accommodate a plurality of functional units mounted (introduced and described in more detail below).
  • the support structure is made of a metallic material, in particular steel and/or aluminium, in such a way as to confer strength and rigidity to the machine itself during its operation.
  • the support structure further comprises a plurality of feet 12, preferably having a plate-like shape, and configured to be rested on the ground in such a way as to distance the packaging machine by a predefined distance from the ground itself.
  • the packaging machine 10 extends along a packaging axis Y and is configured to wrap a predefined quantity of product around a packaging material (see figure 1 ).
  • the packaging material is a flexible film made of a polymeric material, for example preferably selectable from: polyethylene, polypropylene, polyvinylchloride, polyamide.
  • the flexible film is made of polyethylene or polypropylene.
  • the packaging axis Y is substantially orthogonal to the ground, i.e. substantially vertical (see figure 1 ).
  • said packaging axis Y can also be oriented inclined, for example according to an angle of inclination with respect to the aforementioned vertical orientation.
  • the packaging machine 10 comprises a feeding unit 20 comprising at least one reel 21 of packaging material, and configured to unwind the reel 21 along an axis substantially parallel to the packaging axis Y.
  • the reel 21 is configured to be rotatably mounted on the feeding unit 20, and comprises a tubular element around which the flexible film is wrapped, extending along a longitudinal axis Z and configured to rotate around the same longitudinal axis Z.
  • This longitudinal axis Z is substantially parallel to the ground, i.e. substantially horizontal.
  • the packaging axis Y is substantially orthogonal to the longitudinal axis Z, i.e. substantially vertical.
  • the machine 10 further comprises a forming unit 30 configured to receive the packaging material from the feeding unit 20 and shape it so as to form an at least partially closed casing.
  • the forming unit 30 comprises a forming member, in particular called “forming tube” in the technical jargon of the sector, on the outside of which the flexible film moved by means of rollers or belts flows, and inside of which a predefined quantity of product to be packaged is dropped vertically (i.e. from top to bottom) due to the effect of gravity.
  • a forming member in particular called “forming tube” in the technical jargon of the sector, on the outside of which the flexible film moved by means of rollers or belts flows, and inside of which a predefined quantity of product to be packaged is dropped vertically (i.e. from top to bottom) due to the effect of gravity.
  • the flexible film is forced to wrap the aforementioned forming tube in such a way as to obtain an at least partially closed casing, in particular closed at least at an outer side surface thereof and open at a head and tail portion of the casing, respectively.
  • the forming unit 30 is configured to shape the flexible film in such a way as to give the flexible film a substantially tubular shape, i.e. completely similar to the shape of the aforementioned forming tube.
  • the machine 10 further comprises a packaging unit 40, in particular a sealing and cutting unit for the flexible packaging film, operatively associated with the forming unit 30 and configured to seal and cut flaps of the casing, in such a way as to seal the casing itself around a predefined quantity of product to be packaged to make a plurality of sealed packages.
  • a packaging unit 40 in particular a sealing and cutting unit for the flexible packaging film, operatively associated with the forming unit 30 and configured to seal and cut flaps of the casing, in such a way as to seal the casing itself around a predefined quantity of product to be packaged to make a plurality of sealed packages.
  • the machine 10 further comprises a clipping unit 50 operatively associated with the packaging unit 40 and configured to grasp each sealed package and apply a flexible sealing band 51 on the sealed package itself.
  • the clipping unit 50 is preferably arranged in a lowered position with respect to the packaging unit 40.
  • a casing is sealed at the respective head and tail portions in such a way as to make a sealed package, and is subsequently clipped with the aforesaid flexible band 51.
  • the flexible sealing band 51 is preferably made of a flexible polymeric material, for example completely similar to the material from which the flexible packaging film is made.
  • the packaging unit 40 comprises sealing grippers 41a, 41b, preferably sealing bars, movable along the packaging axis Y between a sealing and cutting configuration in which the sealing grippers 41a, 41b are in a position for gripping the casing, and a packaging configuration in which the sealing grippers 41a, 41b are in a position for releasing the sealed casing.
  • the sealing grippers 41a, 41b are movable, at least partially, along the packaging axis Y in such a way as to switch from the packaging configuration to the release configuration substantially continuously, i.e. not intermittently, without therefore stops or breaks in their movement, unless stopping actions forced from the outside by an operator.
  • each of the sealing grippers 41a, 41b is configured to respectively follow a closed cyclic path.
  • These sealing grippers 41a, 41b come at least partially into mutual contact, in particular when located at a close point of the respective closed cyclic paths.
  • the feeding unit 20, the forming unit 30 and the clipping unit 50 are configured to operate synchronously on the packaging material in such a way as to obtain a continuous flow of sealed packages equipped with the flexible sealing band 51.
  • packaging unit 40 is also preferably substantially synchronized with the aforementioned units.
  • the packaging machine 10 is capable of producing a large number of sealed and/or clipped packages in the unit of time, or at least higher than the packaging machines of known type, since the movement of the aforementioned functional units of the machine is continuous and substantially without stops, breaks and non-productive times.
  • the machine 10 comprises movement means 70 configured to continuously move the sealing grippers 41a, 41b between the sealing and cutting configuration and the packaging configuration.
  • the movement means 70 comprises articulated kinematics 71 configured to move the sealing grippers 41a, 41b along the closed trajectory.
  • the movement means 70 comprises four articulated kinematics 71 each mechanically connected to a respective end portion of each sealing gripper 41a, 41b.
  • two articulated mechanisms 71 are arranged in a lateral zone of the machine 10, while two other articulated mechanisms 71 are arranged opposed, in particular facing, the previous ones, i.e. arranged at the opposite lateral zone of the machine itself (see figures 1 and 4A ).
  • the articulated kinematics comprises a rotating member, for example a rotating drum or the like, configured to rotate around its own axis of rotation, and accommodate the sealing grippers 41a, 41b.
  • articulated kinematics are preferably of the eccentric type (as illustrated in figures 4A-4B and described in more detail below).
  • the movement means 70 further comprises at least one first mechanical transmission, preferably of the rigid type, connected to each end of each articulated mechanism 71, and configured to actuate it.
  • the first mechanical transmission comprises a gear train, in particular a triad of toothed wheels 72a, 72b, 72c kinematically constrained to each other and arranged substantially parallel to said clipping axis S.
  • toothed wheels 72a and 72b are mechanically connected to a respective articulated mechanism 71, while the toothed wheel 72c drives into rotation the aforementioned toothed wheels.
  • the toothed wheels 72a, 72b, 72c have a toothing of the helical type.
  • the noise of the packaging machine 10 during its operation is reduced to a minimum.
  • the movement means 70 further comprises at least a second mechanical transmission 80, preferably of the flexible type, and mechanically connected to the first mechanical transmission to drag it into rotation.
  • the second mechanical transmission 80 comprises a chain, in particular wound around two toothed pinions.
  • a first pinion 73a is connected to a motor 75, preferably an electric motor, for example brushless or asynchronous, and driven into rotation by the motor itself.
  • a second toothed wheel 73b is mounted on a transmission shaft 90. This transmission shaft 90 is configured to transmit the power produced by the electric motor 75 between the second mechanical transmission 80 (i.e. the chain) and the first mechanical transmission.
  • the second mechanical transmission 80 comprises a belt, preferably a synchronous belt, i.e. a toothed belt.
  • the packaging machine 10 comprises two first and second mechanical transmissions, i.e. two triads of toothed wheels and two chains.
  • each of said mechanical transmissions is associated and arranged respectively to/at opposed lateral zones of the machine 10 itself, as illustrated in detail in figures 3 and 4A .
  • the closed trajectory comprises a sealing section and a repositioning section for the sealing grippers 41a, 41b.
  • the sealing section corresponds to a portion of the trajectory followed by the sealing grippers 41a, 41b in which said sealing grippers 41a, 41b are substantially in mutual contact, i.e. in a close configuration.
  • the sealing section is travelled by the sealing grippers 41a, 41b in a greater time interval than a time interval that said sealing grippers 41a, 41b take to travel said repositioning section.
  • the closed trajectory preferably has an oblong or oval or D-shaped shape.
  • the sealing grippers 41a, 41b are mechanically mounted on a respective articulated mechanism 71 (as anticipated above), in particular eccentrically, in accordance with a predefined eccentricity value (indicated with the letter and in figure 4B ).
  • Each articulated mechanism 71 is configured to rotate around its own axis (for example indicated with V in figure 4B ), in such a way as to perform a substantially circular movement around this axis of rotation V.
  • the sealing grippers 41a, 41b are slidably constrained to translate along respective sliding guides, for example longitudinal bars B 1, B2.
  • the sealing grippers 41a, 41b travel the aforementioned trajectory.
  • the packaging machine produces sealed packages having mechanically resistant sealing sections since the time interval in which the sealing grippers 41a, 41b are in contact with the aforementioned head and tail portions of the casing of flexible film is prolonged over time, or at least longer than that of the traditional packaging machines of known type.
  • the synchronization means is configured to synchronize at least one speed of unwinding of the packaging material from the reel 21 along the longitudinal axis Z, at least one speed of dragging the packaging material along the packaging axis Y, and at least one speed of movement of the sealing grippers 41a, 41b of the packaging unit 40.
  • the synchronization means preferably comprises a mechanical cam or an electronic cam.
  • the packaging machine 10 is able to reconfigure itself to easily and quickly switch from a package with a predefined format (e.g. 200 grams of product) to another package having a different format (e.g. 400 grams).
  • a predefined format e.g. 200 grams of product
  • a different format e.g. 400 grams
  • the packaging machine 10 comprises a plurality of electric motors, in particular each one in charge of the actuation and therefore of the movement of a respective functional unit.
  • this mechanical cam comprises a connection of the mechanical type aimed at defining a mechanical synchronization of the speeds of the aforementioned functional units, e.g. rotation speed of the reel 21, sliding speed of the flexible film along the forming tube and speed of travel of the closed trajectory by the sealing grippers 41a, 41b.
  • the packaging machine 10 may comprise an electronic cam, which defines an electronic connection between the aforementioned functional units.
  • the machine 10 comprises activation means configured to selectively activate and/or deactivate the clipping unit 50 so as to apply the flexible band 51 on a preselected package.
  • the packaging machine 10 is operationally flexible as it is able to make, depending on the production needs, packages that are sealed and/or equipped with the aforementioned flexible sealing band 51.
  • the packaging machine 10 preferably comprises an electronic control unit connected to the aforementioned synchronization means and to the activation means and configured to exchange signals with the synchronization and activation means themselves, in such a way as to command them.
  • the electronic control unit comprises a receiving module, configured to receive electrical signals (e.g. wired or wireless), a processing module, configured to process said signals, and a sending module, configured to send said signals.
  • a receiving module configured to receive electrical signals (e.g. wired or wireless)
  • a processing module configured to process said signals
  • a sending module configured to send said signals.
  • the movement of moving parts of the aforementioned functional units of the packaging machine 10 is preferably performed in feedback and/or numerically controlled (CNC) on the basis of suitable command signals sent by the electronic control unit.
  • CNC numerically controlled
  • the electronic control unit is preferably a programmable logic controller (PLC) or the like.
  • PLC programmable logic controller
  • the packaging machine 10 comprises at least one user interface device, for example a screen and at least one numeric keypad and/or a touch screen, for setting initial working values, such as for example the dimensions of the casings, the production speed (number of packages made in the unit of time), etc.
  • initial working values such as for example the dimensions of the casings, the production speed (number of packages made in the unit of time), etc.
  • the clipping unit 50 is configured to grasp each sealed package and move it along a clipping axis S transverse, preferably orthogonal, to the packaging axis Y.
  • the present invention also relates to a method for packaging a predefined quantity of product with a packaging material.
  • the aforementioned method is carried out by means of a packaging machine comprising a feeding unit 20 with at least one reel 21 of a packaging material, a forming unit 30 configured to receive said packaging material and shape it so as to form an at least partially closed casing; a packaging unit 40 configured to seal and cut flaps of said casing, in such a way as to seal said casing; as well as a clipping unit 50 configured to grasp a sealed package and move said sealed package in such a way as to apply a flexible sealing band 51 on said sealed package.
  • the method in question comprises the following operational steps:
  • said feeding unit 20, said forming unit 30 and said clipping unit 50 are moved in a synchronized manner with each other so as to operate on the packaging material in such a way as to obtain a continuous flow of sealed packages and equipped with said flexible sealing band 51.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
EP24205292.6A 2023-10-24 2024-10-08 Machine d'emballage Pending EP4559824A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102023000022221A IT202300022221A1 (it) 2023-10-24 2023-10-24 Macchina confezionatrice

Publications (1)

Publication Number Publication Date
EP4559824A1 true EP4559824A1 (fr) 2025-05-28

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ID=89573481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24205292.6A Pending EP4559824A1 (fr) 2023-10-24 2024-10-08 Machine d'emballage

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EP (1) EP4559824A1 (fr)
IT (1) IT202300022221A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1471003A2 (fr) * 2003-04-24 2004-10-27 Frans Vermee GmbH Procédé et dispositif pour la fabrication d'emballages tubulaires remplis et un emballage tubulaire rempli
WO2006068207A1 (fr) * 2004-12-22 2006-06-29 Asahi Kasei Life & Living Corportaion Conditionnement tubulaire et ses procede et equipement de conditionnement
US20180127132A1 (en) * 2016-11-04 2018-05-10 Nestec Sa Adjustable horizontal form-fill-seal devices and methods of using same
IT202200001376A1 (it) 2022-01-27 2023-07-27 Pfm S P A Macchina confezionatrice verticale di buste ad uso alimentare o simili

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1471003A2 (fr) * 2003-04-24 2004-10-27 Frans Vermee GmbH Procédé et dispositif pour la fabrication d'emballages tubulaires remplis et un emballage tubulaire rempli
WO2006068207A1 (fr) * 2004-12-22 2006-06-29 Asahi Kasei Life & Living Corportaion Conditionnement tubulaire et ses procede et equipement de conditionnement
US20180127132A1 (en) * 2016-11-04 2018-05-10 Nestec Sa Adjustable horizontal form-fill-seal devices and methods of using same
IT202200001376A1 (it) 2022-01-27 2023-07-27 Pfm S P A Macchina confezionatrice verticale di buste ad uso alimentare o simili

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