EP2431280B1 - Machine for applying a packaging hood on an object - Google Patents

Machine for applying a packaging hood on an object Download PDF

Info

Publication number
EP2431280B1
EP2431280B1 EP11181536.1A EP11181536A EP2431280B1 EP 2431280 B1 EP2431280 B1 EP 2431280B1 EP 11181536 A EP11181536 A EP 11181536A EP 2431280 B1 EP2431280 B1 EP 2431280B1
Authority
EP
European Patent Office
Prior art keywords
hood
grippers
frame
machine according
zone
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.)
Active
Application number
EP11181536.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2431280A2 (en
EP2431280A3 (en
Inventor
Massimiliano Ubertini
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.)
Messersi' Packaging Srl
Original Assignee
Messersi' Packaging Srl
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 Messersi' Packaging Srl filed Critical Messersi' Packaging Srl
Priority to PL11181536T priority Critical patent/PL2431280T3/pl
Publication of EP2431280A2 publication Critical patent/EP2431280A2/en
Publication of EP2431280A3 publication Critical patent/EP2431280A3/en
Application granted granted Critical
Publication of EP2431280B1 publication Critical patent/EP2431280B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65B9/13—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 preformed tubular webs being supplied in a flattened state
    • B65B9/135—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 preformed tubular webs being supplied in a flattened state for palletised loads
    • 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
    • B65B9/13—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 preformed tubular webs being supplied in a flattened state
    • B65B9/14—Devices for distending tubes supplied in the flattened state

Definitions

  • the present invention relates to a machine for wrapping objects, such as packages, with a hood of film.
  • the packages may consist of objects which are stacked on a pallet.
  • hooding machines In the prior art machines, called hooding machines, are known, these machines being designed to fit a hood formed by a tube of heat-shrinkable film onto the package to be covered. The film is then heated in order to cause heat-shrinking thereof around the package. These machines usually form or unroll the tube of film directly above the package receiving zone from a reel which is arranged close to this zone or alongside the machine. Suitable means are provided for conveying the film so as to form with it a hood and transfer it onto the package.
  • the known machines are somewhat slow and the aesthetic quality of the heat-shrunk hood is often unsatisfactory, especially in the case of product packages which cause rapid cooling of the film when the latter accidentally touches them.
  • the heat-shrunk hood has puckers, bumps and irregularities. This is particularly the case, for example, with packs of glass bottles.
  • precisely the packaging of bottles is one of the sectors where rapid execution of the hooding operation is required owing to the high processing speed of the plants which produce the bottles.
  • the heating induced in the film gripping members owing to the film heat-shrinkage cycle may cause melting of the film on these gripping members. This further limits the operating speeds of the machine and results in packaging defects in particular in the case of mobile heating frames.
  • the general object of the present invention is to provide a hooding machine which is able to achieve improved insertion of the hood and a more satisfactory end result.
  • Figure 1 shows, denoted overall by 10, a hooding machine provided in accordance with the principles of the present invention.
  • the machine 10 comprises a fitting unit 13 which is able to fit, from the top downwards, a hood of heat-shrinkable film 12 over an object 14 (for example formed by a pack of objects, such as bottles, boxes, bricks, etc., which are arranged on a pallet) positioned (advantageously on top of a suitable known raised base 50, which may be equipped with means for moving the pack inside and outside of the machine) in a hooding zone 15 of the machine.
  • an object 14 for example formed by a pack of objects, such as bottles, boxes, bricks, etc., which are arranged on a pallet
  • a suitable known raised base 50 which may be equipped with means for moving the pack inside and outside of the machine
  • the hood 12 is advantageously transferred to the fitting unit by known supply means (denoted generally by 11 in Figure 4 ) which may for example form the hood from a strip or a tube of film (if necessary with suitable welding means), as is known to the person skilled in the art.
  • supply means denoteted generally by 11 in Figure 4
  • These means for supplying and for forming, where necessary, the hood may be of any known type and will therefore not be further described or shown here.
  • the vertical fitting unit 13 comprises a conveying frame 33 and, advantageously, a heat-shrinking frame 34 arranged on top (advantageously both in the form of a closed rectangle lying in a horizontal plane), which frames are motor-driven so as to slide vertically in sequence about the object which is positioned in the hooding zone (as schematically shown in Figures 4-7 ).
  • sliding is performed by means of suitable motor-driven support carriages 51, 52 sliding along a pair of vertical uprights 21.
  • a protective frame 35 which defines the inlet from above in this zone for the hood.
  • This protective frame which is for example made of metal mesh or the like, defines externally a zone 36 which receives the heat-shrinking frame when not operative (in its raised position) so as to prevent contact between the hood and heating means 39 (for example gas air heaters) present on the heat-shrinking frame and protect the hood during insertion onto the object by the conveying frame 33.
  • heating means 39 for example gas air heaters
  • the conveying frame 33 supports vertical grippers 37 which are operated so as to grip the edge of the hood of heat-shrinkable film.
  • the grippers 37 have means for position adjustment depending on the transverse dimensions of the hood, so as to be able to position them close to the hood edges. These means may be formed by suitable guides and supporting cross members for the grippers, as can be clearly seen in Figure 1 .
  • the conveying frame 33 has advantageously an outer peripheral structure 61 on which facing cross members 55 sliding parallel to each other by guide means 53 which are positioned on the frame at the ends of the cross members are arranged.
  • the grippers 37 are slidably mounted on the cross members. Suitable locking means (for example of the screw type) allow the grippers and the cross members to be locked in the desired position depending on the dimensions of the hood.
  • Known motor-driven means may be provided for automatic or semiautomatic adjustment.
  • the grippers are advantageously four in number and arranged facing each other in pairs on opposite sides of the hood.
  • the grippers 37 have jaws 56 and 57 which can be opened and closed by means of a suitable actuator 58 and which are intended to be arranged with one of them on the outside of the edge of the hood 12 and the other one on the inside, so as to grip and retain the hood, when operated.
  • the outer jaw 56 is designed movable so as to rotate about an axis 60 (as shown in broken lines in Figure 2 ), while the inner jaw 57 is designed fixed.
  • Nozzles for emitting air inside the hood are directly arranged on the grippers 37.
  • the inner jaw 57 has its free end 59 which forms a mouth with a wide slit extending parallel to the closing surface of the jaws and, in this case, to the axis of rotation 60. This also defines the plane of the overlying film wall.
  • the outer jaw 56 is formed as a hollow box-shaped element (with a triangular shape) having a jaw wall 63 which is situated above an opening 64 directed towards the jaw 57.
  • the jaw 57 is formed open towards the jaw 63 (so as to have a generally C-shaped cross-section).
  • Flexible pipes 62 convey pressurized air into the box-shaped jaw 57.
  • the gripper when the gripper is closed, the air is able to pass from one jaw to the other one and exit from the slit 59 into the hood 12.
  • the inside of the jaws is sealingly closed, the two jaws forming a single box-shaped container.
  • the conveying frame advantageously comprises means for blowing air to be supplied to the grippers. These blowing means may comprise a fan 38 (which may be throttled for regulation of the air flow) blowing air through pipes which emerge on the front end of the grippers 37.
  • FIG. 2 it is the same outer peripheral frame 61 which is formed box-shaped so as to convey the air flow from the fan 38 to zones close to the grippers where flexible pipes 62 for connecting the inside of the peripheral frame 61 and the grippers are present.
  • each gripper may also advantageously rotate about the axis 60 upon operation of an actuator 65 so as to move from the first vertical operating position shown in Figure 1 into the second operating position (shown in Figure 4 ) inclined towards the inside of the hood, for the reasons which will become clear below. It has been found that by blowing directly air from the grippers (namely from the main gripping point of the hood) correct inflation of the hood is improved considerably and oscillations which may damage the quality of the final product are reduced.
  • the hood is supplied so that it is gripped by the grippers 37 with the frame 33 arranged at the top (and the heat-shrinking frame, where present, seated inside the protective element 35). Following which, the air is supplied to the grippers and the hood is thus inflated. The frame 37 then starts its travel movement for inserting the hood over the object 14 to be lined ( Figure 5 ).
  • the conveying frame 33 stops and the heat-shrinking frame 34 starts its travel movement downwards, with the heating means which are activated and are directed towards the outer surface of the fitted hood, while advantageously blowing of air into the hood continues ( Figure 7 ).
  • the package may be removed and a new object to be wrapped may be arranged in the hooding zone ( Figure 8 ).
  • the wrapping operations are performed more quickly and the result is always of a satisfactory quality.
  • the movement of the heat-shrinkage means may be performed more quickly owing to the fact that the hood touches stably the package only after it has been heat-shrunk.
  • a low power consumption may be maintained.
  • the machine is compact and has small dimensions.
  • the quality of the end product is improved owing to the innovative features which characterize insertion, retention and heat-shrinking of the hood on the object.
  • the air which flows directly into the grippers cools the grippers and avoids the potential risk of the film becoming glued to the grippers, especially after repeated heat-shrinking cycles and when, at the base of the package, the heat-shrinking frame remains longer in order to form a bead of heat-shrunk film.
  • cooling may advantageously affect also the gripper actuating piston which is arranged inside said gripper, so as to protect it from overheating.
  • the conveying frame may be cooled by the air flow directed towards the grippers.
  • blowing nozzles are directly situated on the grippers, they are correctly positioned inside the hood without the need for further separate adjustment of the position.
  • the above description of an embodiment applying the innovative principles of the present invention is provided by way of example of these innovative principles and must therefore not be regarded as limiting the scope of the rights claimed herein.
  • the proportions of the various parts of the machine may vary depending on the specific requirements and the dimensions of the products to be wrapped.
  • heat-shrinkage of the film may also be performed in a separate station, with a heating frame or with a special heated chamber or oven. In this case it is possible to dispense with the heat-shrinking frame 34, and also, if required, the protective frame 35, if it is considered unnecessary for guiding the hood.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Basic Packing Technique (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Wind Motors (AREA)
EP11181536.1A 2010-09-21 2011-09-16 Machine for applying a packaging hood on an object Active EP2431280B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11181536T PL2431280T3 (pl) 2010-09-21 2011-09-16 Maszyna do nakładania kaptura opakowaniowego na przedmiot

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2010A001715A IT1401948B1 (it) 2010-09-21 2010-09-21 Macchina incappucciatrice con soffiaggio aria.

Publications (3)

Publication Number Publication Date
EP2431280A2 EP2431280A2 (en) 2012-03-21
EP2431280A3 EP2431280A3 (en) 2012-04-25
EP2431280B1 true EP2431280B1 (en) 2015-12-30

Family

ID=43738926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11181536.1A Active EP2431280B1 (en) 2010-09-21 2011-09-16 Machine for applying a packaging hood on an object

Country Status (6)

Country Link
EP (1) EP2431280B1 (pl)
DK (1) DK2431280T3 (pl)
ES (1) ES2565546T3 (pl)
HU (1) HUE028679T2 (pl)
IT (1) IT1401948B1 (pl)
PL (1) PL2431280T3 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202300026064A1 (it) * 2023-12-06 2025-06-06 Officina Mecc Sestese S P A Forno di termoretrazione a migliore efficienza energetica

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2794720B1 (fr) * 1999-06-10 2001-08-31 Thimon Procede et dispositif de mise en forme et de depose d'une housse souple thermoretractable sur une charge palettisee
US6962037B2 (en) * 2001-04-03 2005-11-08 Borchard James A Methods for sealing a load placed on a pallet

Also Published As

Publication number Publication date
EP2431280A2 (en) 2012-03-21
PL2431280T3 (pl) 2016-06-30
ES2565546T3 (es) 2016-04-05
HUE028679T2 (hu) 2016-12-28
ITMI20101715A1 (it) 2012-03-22
EP2431280A3 (en) 2012-04-25
DK2431280T3 (en) 2016-02-15
IT1401948B1 (it) 2013-08-28

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