EP4124579A2 - Vorrichtung zum umhüllen von gegenständen - Google Patents

Vorrichtung zum umhüllen von gegenständen Download PDF

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Publication number
EP4124579A2
EP4124579A2 EP22184170.3A EP22184170A EP4124579A2 EP 4124579 A2 EP4124579 A2 EP 4124579A2 EP 22184170 A EP22184170 A EP 22184170A EP 4124579 A2 EP4124579 A2 EP 4124579A2
Authority
EP
European Patent Office
Prior art keywords
wrapping
paper film
paper
film
stacked objects
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
EP22184170.3A
Other languages
English (en)
French (fr)
Other versions
EP4124579A3 (de
Inventor
Bruno DALLAGLIO
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.)
E80 Group SpA
Original Assignee
E80 Group 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 E80 Group SpA filed Critical E80 Group SpA
Publication of EP4124579A2 publication Critical patent/EP4124579A2/de
Publication of EP4124579A3 publication Critical patent/EP4124579A3/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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/04—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated
    • B65B11/045—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated by rotating platforms supporting the articles
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/02—Applying adhesives or sealing liquids
    • B65B51/023—Applying adhesives or sealing liquids using applicator 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
    • 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
    • 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
    • B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/12—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of wrapping materials, containers, or packages
    • 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
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/02—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for perforating, scoring, slitting, or applying code or date marks on material prior to packaging
    • B65B61/025—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for perforating, scoring, slitting, or applying code or date marks on material prior to packaging for applying, e.g. printing, code or date marks on material prior to packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/12—Lifting, transporting, or inserting the web roll; Removing empty core
    • B65H19/123—Lifting, transporting, or inserting the web roll; Removing empty core with cantilever supporting arrangements
    • 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
    • B65B2210/00—Specific aspects of the packaging machine
    • B65B2210/04—Customised on demand packaging by determining a specific characteristic, e.g. shape or height, of articles or material to be packaged and selecting, creating or adapting a packaging accordingly, e.g. making a carton starting from web material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/40—Holders, supports for rolls
    • B65H2405/46—Grippers for bobbins, i.e. rolls
    • B65H2405/461—Grippers for bobbins, i.e. rolls center gripper (inside the core)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/81—Packaging machines

Definitions

  • the present invention relates to a wrapping device for stacked objects. More particularly, the present invention relates to a wrapping device particularly suitable for wrapping stacked objects with a paper film.
  • the present invention also relates to a method for wrapping stacked objects using the aforementioned device.
  • wrapping devices for stacked objects are known. These devices typically use extensible, heat-shrinkable, heat-sealable films or similar made of plastic material, such as for example polyethylene (PE), polyethylene terephthalate (PET), polypropylene (PP), mixtures of such materials, etc.
  • plastic material such as for example polyethylene (PE), polyethylene terephthalate (PET), polypropylene (PP), mixtures of such materials, etc.
  • eco-sustainable materials such as paper
  • the use of eco-sustainable materials, such as paper poses various problems relating to the dynamics of application of the paper covering on the products or objects to be packaged.
  • the physical properties, for example elasticity and the possibility of extending, of the films of plastic material used for wrapping are not present in the paper films.
  • the reels of paper to be used for the execution of the wrapping can have a very high weight, even greater than about 400 kg. For this reason, in order to be able to use these reels in wrapping devices that operate in a fully automatic way, careful design and structural construction of the device is required so that it can easily handle such heavy weights. This is not yet possible with the wrapping devices taught by the prior art since none automatically manages such high weights.
  • the main object of the present invention is to provide a wrapping device which allows to optimally apply a paper film around stacked objects.
  • a further object of the present invention is to provide a wrapping device which allows to control in an optimal way the tensioning and unwinding of the paper film on such stacked objects.
  • Another object of the present invention is to provide a wrapping device for stacked objects which allows to support and use heavy paper reels in a completely automatic way.
  • Still another object of the present invention is to provide a wrapping device which allows a personalization of the film to be applied to the stacked objects.
  • a further object of the present invention is to provide a wrapping device that allows the application of a strong, safe wrapping and that allows to contain the stacked objects with high stability.
  • a wrapping device for stacked objects is provided according to claim 1.
  • a method of wrapping stacked objects according to claim 23 is provided.
  • the reference number 1 indicates a wrapping device according to an example of embodiment of the present invention.
  • the wrapping device 1 is particularly suitable for wrapping or, in any case packing, loads or, more particularly, stacked objects SO.
  • the stacked objects SO can comprise any type of load, and are preferably positioned on and supported by a pallet P.
  • the pallet P can have dimensions equal to about 1000 mm in length and about 1200 mm in width, or even about 1000 mm in length and approximately 800 mm in width.
  • the dimensions of the pallet P can have a length of up to about 1300 mm and a width of up to about 1100 mm.
  • the wrapping device according to the present invention can be easily adaptable to any dimension of pallet P and of the load to be palletized.
  • a wrapping head 3 included in the wrapping device 1, mounted vertically slidably for wrapping stacked objects SO on a rotating base 2, for example positioned on and supported by a pallet P.
  • the rotating base 2 rotates around a vertical or substantially vertical axis, while the wrapping head 3 mainly performs vertical or substantially vertical movements.
  • the present invention can also relate to a wrapping device 1 in which the stacked objects SO to be wrapped are locally stationary, while the wrapping head 3 is supported and driven to rotate around the aforementioned stacked objects SO locally stationary.
  • the wrapping device 1 comprises a rotating base 2 intended to support and drag the stacked objects SO in rotation, a vertically slidably mounted wrapping head 3 intended to receive and convey a film for wrapping said stacked objects SO supported and dragged in rotation from the rotating base 2 and an electronic control unit 5 intended to control the vertical movement of the wrapping head 3 as a function of the rotation speed of the rotating base 2.
  • the wrapping device 1 is intended to apply a paper film 4 around the stacked objects SO on the rotating base 2 for wrapping the latter.
  • the wrapping head 3 before starting the wrapping procedure of the stacked objects SO, can be moved through movement means MM, for example an anthropomorphic robotic arm, or even of another type, to be displaced easily in a wrapping start position.
  • movement means MM for example an anthropomorphic robotic arm, or even of another type, to be displaced easily in a wrapping start position.
  • the wrapping head 3 can be operatively connected to an operational end of the movement means MM.
  • the wrapping device 1 preferably comprises a paper reel 6 for feeding the wrapping head 3.
  • the paper reel can have a diameter of between about 76 mm and about 1200 mm.
  • the larger the diameter the greater the weight of the paper reel 6. Therefore, in the case of a paper reel 6 having a diameter approximately close to about 1200 mm, the weight of the reel 6 can be even some hundreds of kilograms, for example about 460 kilograms.
  • the paper reel 6 is supported, in use, from below by at least one support component or crosspiece 20 configured to support the weight of the paper reel 6 and to protect the wrapping device 1 from possible breakages and/or malfunctions of the wrapping head 3.
  • the support component 20 ensures adequate support of the paper reel 6 during the wrapping operating phase, and adequate protection of the wrapping device 1 from breakage and/or accidental malfunctions that could compromise the correct functionality of the device 1 itself as well as the safety of the operating environment.
  • the wrapping head 3 also comprises an impediment component 21 operatively associated with the paper reel 6 and configured to prevent accidental unwinding of the latter.
  • This impediment component 21 can advantageously comprise a central portion 21a and one or more perimeter or petal portions 21b, for example four perimeter or petal portions 21b, which radially branch outwards from the central portion 21a.
  • the lying plane of the central portion 21a is aligned with that of the one or more perimeter or petal portions 21b so that this impediment component 21 rests or, in any case, is in contact without interruption of continuity with the bottom or, in use, lower portion of the paper reel 6.
  • the wrapping device 1 must be able to withstand, from the mechanical point of view, of inertia, etc., the movement of heavy paper reels 6, in a completely automatic way.
  • the rotating base 2 can have any shape, for example square, circular, rectangular, etc. and is capable of rotating by an angular value between about 30°/sec and about 200°/sec.
  • the range of angular speeds just mentioned refers to an average angular speed of the rotating base 2, since, as can be understood, the latter initially starts at a standstill.
  • the aforementioned angular value can be set a priori, for example through a suitable software program for controlling the settings of the wrapping device 1, according to different application needs, for example a certain number of stacked objects SO to be wrapped in a certain interval of time, or also based on the need to maintain the stability of the load to be palletized.
  • the electronic control unit 5 In order for the electronic control unit 5 to correctly manage the vertical movement of the wrapping head 3 and therefore also the unwinding of the paper film 4 around the stacked objects SO, it is appropriate to know the dimensions of the stacked objects SO and/or, in the present case where these latter are positioned on a pallet P, the dimensions of this pallet P.
  • the wrapping device 1 can comprise verification means 13 intended to verify at the beginning and/or during wrapping the dimensions of the stacked objects SO and/or of the pallet P, so as to consequently inform the electronic control unit 5 to control the rotation of the rotating base 2 and/or the vertical movement of the wrapping head 3 according to these dimensions.
  • the verification means 13 can comprise or be, for example, at least one ultrasonic sensor intended to detect the width of the load or of the stacked objects SO and/or one or more photoelectric sensors intended to detect the length of the load or of the stacked objects SO and/or at least a first encoder intended to detect the height of the load or of the stacked objects SO.
  • the verification means 13 can comprise at least a second encoder intended to be used in synergy with the one or more photoelectric sensors, if provided.
  • the wrapping device 1 can comprise gripping means 7 intended to retain the paper film 4 near the stacked objects SO on the rotating base 2.
  • the gripping means 7 are intended to maintain the paper film 4 at least for the first wrapping round of the stacked objects SO on the rotating base 2.
  • such gripping means 7 can be or comprise at least one gripper including a first element and a second element mutually movable between an open position and a closed position for gripping the end 4a of the paper film 4.
  • the gripping means 7 can hold the paper film 4 or better one end 4a thereof for at least the first wrapping round, and then eventually release said end 4a which will thus remain inside the wrapping, so as not to leave any protrusion of paper film 4 from the wrapping and thus giving a pleasant aesthetic effect to the packaging, as well as optimizing its handling and duration.
  • the wrapping device 1 or more particularly the wrapping head 3 comprises at least one motor 9, for example at least one electric motor, intended to command the unwinding of the paper film 4 from the paper reel 6.
  • the wrapping device 1 or, more particularly, the wrapping head 3 comprises a first axial motor 9a, i.e., intended to unwind the paper film 4 at a constant speed with respect to the geometry of the stacked objects SO or, if present, with respect to the pallet P, and a second perimeter or peripheral motor 9b, i.e., intended to unwind the paper film 4 with a speed dependent on the geometry of the stacked objects SO or, if present, on the geometry of the pallet P.
  • the unwinding of the paper reel 6 with this hybrid motorized system i.e., with a first axial motor 9a and a second perimeter or peripheral motor 9b, allows precise control of the masses and accelerations present in the wrapping device 1.
  • the at least one motor 9 acts on an unwinding element 9c of the paper reel 6 operatively associated with it so that the action of the at least one motor 9 can rotate said unwinding element 9c which, in turn, allows rotation of the paper reel 6 allowing the unwinding of the paper film 4.
  • the unwinding element 9c can be, for example, an expansion shaft.
  • the management of the tensioning forces of the paper film 4 is of fundamental importance.
  • the unwinding speed of the paper film 4 changes according to the size of the stacked objects SO, possibly depending on the dimensions of the pallet P on which the stacked objects SO are positioned and supported, and/or also depending on the rotation speed of the rotating base 2.
  • the wrapping device 1 preferably comprises tensioning means 8 of the paper film 4 near the stacked objects SO.
  • the unwinding speed of the paper film 4 changes according to the current application point of the same on the load that is being wrapped.
  • the radius r is directly proportional to the tangential speed v T and therefore, with the same rotation speed of the rotating base 2, an increase in the radius r also follows an increase in the tangential speed v T . Therefore, at the edges of the pallet P, the unwinding speed of the paper film 4 will be maximum while, at the midpoints of the sides of the pallet P, the unwinding speed of the paper film 4 will reach two distinct minimum values, since a substantially rectangular shaped pallet P has been assumed. If the pallet P were, for example, substantially square, there would be a maximum value at the edges of the same while a minimum value at each midpoint of its sides. As can be understood, the management of the tangential speed v T of unwinding of the paper film 4 is of fundamental importance for the outcome of the wrapping.
  • the tensioning means 8 can comprise at least one actuator 8b, for example at least one adjustable-pressure pneumatic actuator, which pressure can be adjusted by means of the electronic control unit 5 according to set wrapping modes.
  • suitable means of connection may be provided (not shown in the figures) to put in electrical and/or electronic communication the at least one actuator 8b with the electronic control unit 5.
  • the tensioning means 8 preferably also comprise accumulation and/or release means of the paper film 4 intended to accumulate and/or release such film according to the geometry of the stacked objects SO and/or according to the speed of the rotating base 2.
  • the stacked objects SO are positioned on a 1200x800 mm pallet P and that the rotating base rotates at a speed of about 135°/sec.
  • the at least one motor 9 or more particularly the first axial motor 9a would require an average unwinding speed of the paper film 4 equal to about 1500 mm/s while the second perimeter or peripheral motor 9b would require an unwinding of the paper film 4 with speed variations from 940 mm/s to 1700 mm/s and with accelerations even up to about 2530 mm/s 2 .
  • the wrapping device 1 or, more particularly, the wrapping head 3 can use the accumulation and/or release means 8a.
  • said accumulation and/or release means 8a can be or comprise one or more movable rollers, for example three movable rollers, which, depending on the geometry of the stacked objects SO or, if present, of the pallet P, accumulate or release the paper film 4.
  • the movement of the accumulation and/or release means 8a, or of the one or more movable rollers, is preferably managed through at least one actuator 8b.
  • an adjustable-pressure pneumatic actuator 8b is operatively associated with each movable roller of the accumulation and/or release means 8a: the electronic control unit 5 can adjust the pressure of the at least one pneumatic actuator 8b to move the respective movable roller associated therewith so as to accumulate or release the paper film 4 according to the geometry of the load being wrapped.
  • the at least one motor 9 of the wrapping head 3 or, more particularly, the first axial motor 9a and the second perimeter or peripheral motor 9b can preferably unwinding or winding the paper film 4 so that the accumulation and/or release means 8a accumulate an average quantity of paper film 4, i.e., an amount such as to be able to start wrapping the stacked objects SO with a correct tensioning of the paper film 4 itself.
  • a maximum quantity of paper film 4 that can be accumulated by the accumulation and/or release means 8a can be predefined, for example about 800 mm, and before wrapping each load of stacked objects SO, the accumulation and/or release means 8a can preferably accumulate about half of the predefined quantity of paper film 4, for example 400 mm.
  • the predefined maximum quantity of paper film 4 that can be accumulated by the accumulation and/or release means 8a is set in such a way that it is possible to wrap different geometries of stacked objects SO, if desired on pallets P of different dimensions.
  • the variation in the accumulation of paper film 4 during the wrapping of the pallet P considering an average unwinding speed of the paper reel 6 equal to about 1500 mm/sec, it is between about 315 mm and about 430 mm.
  • the variation in the accumulation of paper film 4 during wrapping of the pallet P considering an average unwinding speed of the paper reel 6 equal to about 1500 mm/sec, is between about 394 mm and about 511 mm.
  • the setting of a maximum predefined value of quantity of paper film 4 that can be accumulated by the accumulation and/or release means 8a, and the consequent initial accumulation of paper film 4 of a median value with respect to the maximum predefined value allows to optimally manage any load of any geometry of stacked objects SO to be wrapped, even considering different average unwinding speeds of the paper film 4.
  • the wrapping device 1 therefore allows to carry out a real-time control of the unwinding of the paper film 4 through an optimized management of the accumulation and/or release means 8a.
  • the tensioning means 8 can comprise film guiding means 10, for example one or more idle rollers, intended to guide the paper film 4 through a certain path.
  • the unwinding of the paper film 4 is clearly managed by the at least one motor 9 and by the tensioning means 8, however, it is necessary for the electronic control unit 5 to check that the unwinding is taking place in accordance with what is established on the base of the set wrapping mode(s).
  • the wrapping device 1 can comprise at least a first encoder, operatively associated with the guiding means 10 or, more particularly, with the one or more idle rollers, in electrical and/or electronic communication with the electronic control unit 5, at least a second encoder, operatively associated with the at least one motor 9, in electrical and/or electronic communication with the electronic control unit 5 and detection means (not shown in the figures) of the position, for example at least one position sensor, of the accumulation and/or release means 8a or, more particularly, of the one or more movable rollers, also in electrical and/or electronic communication with the electronic control unit 5.
  • the first encoder, the second encoder and the detection means can advantageously be used to detect and transmit values relating to the electrical angular position of the at least one motor 9 and the guiding means 10 and values relating to the spatial position of the accumulation and/or release means 8a.
  • the electronic control unit 5 can then interpret these values in order to check if the wrapping operation is proceeding correctly according to set wrapping modes. In this regard, the electronic control unit 5 can check whether the at least one motor 9 is unwinding the paper film 4 at the right speed, whether the accumulation and/or release means 8a are accumulating and/or releasing the paper film 4 correctly following the geometry of the load being wrapped, etc.
  • the wrapping device 1 or, more particularly, the wrapping head 3 can comprise folding means 11 of the paper film 4 so as to allow the wrapping of the stacked objects SO with folded paper film 4.
  • the folding means 11 allow to fold, at least once, one or both flaps 4b, 4c of the paper film 4 unwinding from the paper reel 6 so as to reinforce the same during the wrapping of the stacked objects SO.
  • the portion of paper film 4 folded for one or both flaps 4b, 4c can be for example between about 0.5 cm and about 1.5 cm. This allows to increase the containment capacity of the wrapping and at the same time decrease the possibility of tears during the application of the same without substantially changing the covering surface.
  • the folding of one or both flaps 4b, 4c reduces the risk that the gripping means 7 damage the paper film 4.
  • the folding means 11 are or comprise at least one guide element 11a, for example a suitably shaped sheet, and abutment means 11b for the paper film 4, for example one or more rotating or even fixed disks, intended to abut in at least one point of contact with the paper film 4 to carry out the folding.
  • the paper film 4 unwinding from the wrapping head 3 is guided through the profile of the at least one guiding element 11a by means of the abutment means 11b which allow, encountering with the paper film 4 in at least one point of contact, for example a point at a curvature of the at least one guide element 11a, the realization of the fold.
  • the wrapping device 1 to suitably manage the overlaps of the paper film 4 during wrapping of the stacked objects SO, can comprise tilting means 12 of the wrapping head 3 designed to tilt the wrapping head 3 at different angles depending on the processing phases.
  • the tilting means 12 are controlled by the electronic control unit 5 so that the latter can synchronize the action of the tilting means 12 with the vertical translation of the wrapping head 3, for example on the basis of the rotation speed of the rotating base 2. It is therefore possible to customize the wrapping of the stacked objects SO, for example by providing a wrapping with more overlaps of winding for less stable loads and/or, conversely, a wrapping with fewer overlaps of winding for more stable loads.
  • a further parameter to be taken into consideration for the correct unwinding of the paper film 4 is that relating to the measurement of the diameter of the paper reel 6.
  • the progressive decrease in the diameter of the paper reel 6 affects the tensioning means 8 since it increases the actual length of paper film 4 unwound, consequently modifying the ideal tension values.
  • the wrapping device 1 preferably comprises acquisition means 18, for example at least one optical sensor, intended to acquire the dimensions of the paper reel 6.
  • acquisition means 18 are in electrical and/or electronic communication with the electronic control unit 5, so as to transmit these dimensions to the latter to regulate the unwinding of the paper film 4 and prevent the breaking of the latter.
  • the acquisition means 18 are capable of continuously acquiring the current diameter value of the paper reel 6, for example by correlating the angle traveled by the paper reel 6 set in motion by the at least one motor 9 with the linear amount of paper film 4 actually unwound.
  • the value of L f can be calculated, for example, by means of the first encoder operatively associated with the guiding means 10 while the value of ⁇ f - ⁇ o can be calculated, for example, by means of the second encoder operatively associated with the at least one motor 9 or more in particular to the first axial motor 9a.
  • the acquisition means 18 and the verification means 13, if present, allow, by detecting and communicating certain dimensional parameters to the electronic control unit 5, to continuously implement, both individually and synergistically, retroactive controls necessary or, in any case, advantageous to optimize the tensioning and, therefore, the wrapping of the stacked objects SO and/or of the pallet P with the paper film 4, which as previously mentioned, not having an elastic component comparable to the classic plastic packaging film, requires a special adjustment of the tension.
  • these retroactive controls allow a very rapid response time and adjustment of the unwinding and, therefore, of the tensioning of the paper film 4 since the electronic control unit 5 can promptly control the speed of the at least one motor 9 according to these dimensional parameters, preventing the breaking of the paper film 4.
  • the wrapping device 1 or, more particularly, the wrapping head 3 can comprise cutting means 14 of the paper film 4 controlled by the electronic control unit 5.
  • the cutting means 14 can comprise or be at least one blade, for example a rotating blade, if desired a circular rotating blade: during wrapping, the cutting means 14 remain in a rest position inside of a suitable housing while at the end of wrapping, in particular when it is necessary to cut the paper film 4, the same can be moved, for example through a pneumatic cylinder, from the rest position to an active cutting position to cut the film of paper 4. After the cutting has been performed, the cutting means 14 can be moved from the active cutting position to the rest position.
  • the wrapping device 1 or, more particularly, the wrapping head 3 can comprise glue or adhesive application means 15 to the paper film 4 applied to the stacked objects SO on the rotating base 2.
  • This application means 15 are controlled by the electronic control unit 5 so as to apply the glue or adhesive in a synchronized manner with the various wrapping steps.
  • the application means 15 can apply glue or adhesive not only at the end of the wrapping, but also in intermediate steps thereof, to optimize the overall seal of the packaging. More specifically, the application means 15 apply glue or adhesive preferably by means of a cold gluing process, which, unlike a hot gluing process, consumes less quantities of energy, does not produce CO2 and requires lower maintenance and cleaning costs.
  • the glue or adhesive application means 15 may comprise dispensing means 15a of glue or adhesive, for example one or more dispensing guns, and pick-up means (not shown in the figures), for example a pump, for picking-up the glue or adhesive from a container of glue or adhesive positioned in the vicinity of the wrapping device 1.
  • the pick-up means are operatively connected with the dispensing means 15a, for example through suitable connection pipes, and can take and supply the glue or adhesive to the dispensing means 15a which will provide for the effective application of the same.
  • the wrapping device 1 can comprise a pressing component or device (not shown in the figures) of the paper film 4 intended to press the paper film 4 at the final phases of a wrapping.
  • This expedient allows complete adhesion of the portion of paper film 4 cut by the cutting means 15 to the stacked objects SO on the rotating base 2, so as to limit any problems related to the so-called "out of shape" that could arise during handling and automatic storage of the load just wrapped.
  • the wrapping device 1 or, more particularly, the wrapping head 3 can comprise printing means 17, preferably inkjet, of the paper film 4 intended to print the paper film 4.
  • printing means 17 are in electrical and/or electronic communication with the electronic control unit 5 so as to print the paper film 4 in a synchronized manner with various wrapping steps. This allows to place desired graphic or written information, such as a logo or the like, in certain points of the wrapping, effectively eliminating the use of adhesive labels.
  • an electrical connector can be provided (not shown in the figures) to which respective connection cables of the components themselves can be connected.
  • the wrapping device 1 can also provide for the possibility of automatically replacing a finished paper 6.
  • the movement means MM of the wrapping head 3 can unhook the finished paper reel 6 in the storage area SA and hook the new reel, so as to be able to resume wrapping operations quickly.
  • the wrapping head 3 can comprise fast hooking and unhooking means 19.
  • stacked objects SO must be wrapped on a pallet P of dimensions equal to about 800x600 mm positioned on the rotating base 2 whose angular speed is set equal to about 100°/sec.
  • the verification means 13 controls and verifies the dimensions of the pallet P so as to consequently inform the electronic control unit 5 to control the rotation of the rotating base 2 and the vertical movement of the wrapping head 3 as a function of the dimensions of the pallet P and of the set angular speed.
  • the gripping means 7 hold the end 4a of the paper film 4 close to the stacked objects SO at least for the first wrapping round.
  • the tensioning means 8 and the motors 9a, 9b allow the unwinding of the paper film 4 with the correct tensioning, so that it can adhere optimally to the geometry of the load to be wrapped.
  • the tilting means 12, if desired, can tilt the wrapping head 3, for example according to set wrapping modes, so as to allow wrapping with a greater or lesser number of overlapping wraps.
  • the folding means 11 so as to fold, for example once, the flaps 4b, 4c of the paper film 4 to obtain a wrapping with reinforced winding.
  • the acquisition means 18 can acquire, every determined time interval, the measurement of the diameter of the paper reel 6 in order to better control the ideal tension values of the paper film 4.
  • printing means 17 it is possible by means of the printing means 17 to print the paper film 4 by positioning graphic or written information at certain positions of the wrapping.
  • the present invention also relates to a method of wrapping stacked objects SO.
  • This method initially comprises the step of providing a wrapping device 1 and a paper film 4 to be applied around the stacked objects SO.
  • the step of commanding may comprise the sub-steps of tilting, by means of tilting means 12, the wrapping head 3 according to the processing steps, and synchronizing the action of the tilting means 12 with the vertical movement of the wrapping head 3.
  • the step of commanding can also comprise the sub-step of checking, by means of checking means 13, at the beginning and/or during wrapping the dimensions of the stacked objects SO so as to consequently inform the electronic control unit 5, and command the rotation of the rotating base 2 and/or the vertical movement of the wrapping head 3 as a function of these dimensions.
  • the step of commanding can also comprise the sub-step of retaining the paper film 4 by gripping means 7 near the stacked objects SO on the rotating base 2, preferably at least for the first wrapping round.
  • the controlling step can also comprise the sub-phase of tensioning, by means of tensioning means 8, the paper film 4 near the stacked objects SO, in which the sub-tensioning phase preferably comprises the phase of accumulating and/or releasing, by means of accumulation and/or release means 8a, the paper film 4 as a function of the rotation speed of the rotating base 2.
  • the step of controlling can comprise the sub-step of folding the paper film 4 by means of folding means 11 so as to allow the wrapping of the stacked objects SO with folded paper film.
  • the step of commanding can also comprise the sub-step of applying, by means of application means 15, glue or adhesive on the paper film 4 applied to the stacked objects SO on the rotating base 2 in a synchronized manner with the various wrapping steps, for example during or at the end of the wrapping.
  • the wrapping method can also comprise the step of cutting the paper film 4 by means of cutting means 14, for example at the end of wrapping.
  • the wrapping method can comprise the step of printing the paper film 4 by means of printing means 17, for example in a synchronized manner with various wrapping steps.
  • the step of commanding may also comprise the sub-steps of acquiring the dimensions of the paper reel 6 by means of acquisition means 18, transmitting these dimensions to the electronic control unit 5 and modify the tension of the paper film 4 on the basis of the dimensions of the paper reel 6 transmitted to the electronic control unit 5.
  • the wrapping method can also comprise the step of pressing the paper film 4 by means of a pressing component at the final wrapping steps.
  • the wrapping device 1 as well as the related wrapping method make it possible to optimally apply a paper film 4 around stacked objects SO.
  • the mechanical structure of the wrapping device 1 allows the handling of paper reels 6 of high weight.
  • the wrapping device 1 besides allowing a personalization of the film to be applied to the stacked objects SO, also allows to obtain a strong and safe wrapping which contains the stacked objects SO with high stability.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
EP22184170.3A 2021-07-09 2022-07-11 Vorrichtung zum umhüllen von gegenständen Pending EP4124579A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000018209A IT202100018209A1 (it) 2021-07-09 2021-07-09 Dispositivo di fasciatura di oggetti

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EP4124579A2 true EP4124579A2 (de) 2023-02-01
EP4124579A3 EP4124579A3 (de) 2023-06-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024246178A1 (en) * 2023-05-30 2024-12-05 Ikea Supply Ag Methods and device for paper wrapping of goods loaded on pallet, and paper-wrapped pallet of goods

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DE1017523B (de) * 1956-08-10 1957-10-10 Voith Gmbh J M Verfahren und Vorrichtung zum Einwickeln von grossen Stoffrollen aus Papier, Textilien u. dgl.
US4458467A (en) * 1981-03-31 1984-07-10 Infra Pak (Dallas), Inc. Pretensioner for stretchable film web with dancer roller compensation
FR2681311B1 (fr) * 1991-09-17 1993-12-10 Philippe Fandard Procede pour conditionner une charge palettisable et installation pour la mise en óoeuvre de ce procede.
GB9400083D0 (en) * 1994-01-05 1994-03-02 Wichita Company Ltd Control system
KR20170025841A (ko) * 2015-08-31 2017-03-08 코닝 인코포레이티드 포장장치 및 포장방법
CN110436243B (zh) * 2019-08-13 2021-10-26 奥克梅包装设备(嘉兴)有限公司 一种伺服控制膜卷装置、膜卷轴及其控制方法
IT201900017258A1 (it) * 2019-09-25 2021-03-25 O B L S R L Un macchinario e relativo metodo per il confezionamento di oggetti posti su pallet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024246178A1 (en) * 2023-05-30 2024-12-05 Ikea Supply Ag Methods and device for paper wrapping of goods loaded on pallet, and paper-wrapped pallet of goods

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IT202100018209A1 (it) 2023-01-09
EP4124579A3 (de) 2023-06-07

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