EP0678452A1 - Machine and method for packaging a palettized load by means of a heat shrinkable sleeve - Google Patents

Machine and method for packaging a palettized load by means of a heat shrinkable sleeve Download PDF

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Publication number
EP0678452A1
EP0678452A1 EP95400868A EP95400868A EP0678452A1 EP 0678452 A1 EP0678452 A1 EP 0678452A1 EP 95400868 A EP95400868 A EP 95400868A EP 95400868 A EP95400868 A EP 95400868A EP 0678452 A1 EP0678452 A1 EP 0678452A1
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EP
European Patent Office
Prior art keywords
sheath
pallet
load
conveyor
underside
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.)
Ceased
Application number
EP95400868A
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German (de)
French (fr)
Inventor
Jean-Paul Martin-Cocher
Georges Jaconelli
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.)
Newtec International SA
Original Assignee
Newtec International SA
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Filing date
Publication date
Application filed by Newtec International SA filed Critical Newtec International SA
Publication of EP0678452A1 publication Critical patent/EP0678452A1/en
Ceased 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
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
    • B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
    • B65B53/066—Mobile frames, hoods, posts or the like

Definitions

  • the present invention relates to a method of packaging a load by heating a heat-shrinkable cover or sheath and to an automatic packaging machine by heating a heat-shrinkable cover or sheath.
  • an overpack of a load is produced by covering the load with a heat-shrinkable sheath which retracts and follows the external contour of the load during a heating step followed by cooling.
  • the heating of the heat-shrinkable sheath is typically ensured by blowing hot gases, in particular air or combustion gases using a burner, diluted with air.
  • the blast of hot shrink gases can displace the sheath, which does not evenly cover the entire load.
  • the retraction reducing not only the perimeter but also the height of the sheath, causes the rise of its lower edge which no longer provides good protection of the lower part of the load.
  • the MSK Company proposed in Patent EP-0 133 462 a packaging device comprising a lifting table comprising suction means. The palletized load is lifted from the transporter giving access to the underside of the pallet.
  • the central suction directs the lower edge of the sheath towards the center of the lower face of the pallet during the simultaneous blowing of hot air ensuring the retraction of said lower edge of the sheath.
  • the lifting table is then lowered and the pallet is put back on the conveyor.
  • the device of Patent EP-0 133 462 has many drawbacks.
  • the suction lift table is a very complex element. In addition, its operation disrupts the distribution of hot air not allowing a quality retraction of the lower edge of the sheath.
  • the suction ensures a pleating of the lower edge of the sheath towards the center of the lower face of the pallet.
  • the folds, after retraction, form zones of irregular thickness comprising zones of lower mechanical resistance.
  • the pallet is rested on the conveyor while the film of the sheath located under the underside of the pallet is still hot and, therefore, fragile. The contact with the transporter deteriorates the film which, before cooling, is unable to support the weight of the palletized load.
  • the stability of the load may be compromised by the fact that the pallet is lifted by studs arranged under the upper floor of the pallet.
  • the excess length of the sheath is grouped at the corners of the pallet and / or of the edges of the palletized load.
  • access to the underside of the pallet is obtained by lowering the pallet transporter resting on the pads of a table.
  • the invention also relates to an overpacking process, characterized in that the maintenance of the sheath is ensured without mechanical contact, preferably by blowing cold air by a ramp located above the means for blowing hot air. ensuring the attachment by heat-shrinking of the vertical extra length on the underside of the pallet.
  • the invention also relates to a method, characterized in that it further comprises a step of pulling on the vertical edges of the sheath in the direction opposite to that of the load, preferably without mechanical contact.
  • the invention also relates to an overpacking process, characterized in that the traction on the edges of the sheath is carried out by air suction.
  • the invention also relates to an overpacking process, characterized in that it further comprises, at the end of step d) hooking by heat shrinking the extra length on the underside of the pallet and before the step e) of placing the load on the conveyor, step g) consisting of cooling the excess length of the sheath located under the underside of the pallet improving its mechanical strength and preventing its deterioration during step e ).
  • the invention also relates to a method, characterized in that the cooling of the excess length of the sheath located under the underside of the pallet is carried out by blowing cold air, preferably from a ramp located under the means for blowing hot retraction air.
  • the invention also relates to a method, characterized in that it comprises, after step b) of depositing a heat-shrinkable sheath on the palletized load, a step h) of smoothing the sheath, preferably by translation from top to bottom over the height of the palletized load of a cold air blowing ramp substantially surrounding the palletized load.
  • the invention also relates to a method, characterized in that in step c) the conveyor is lowered, the pallet resting on a support, preferably a support bearing on the upper floor of the pallet.
  • the invention also relates to a method, characterized in that in step c), the pallet of the conveyor is lifted, preferably using a lifting table bearing on the upper floor of the pallet.
  • the invention also relates to a palletised load overwrapping machine comprising a conveyor for supplying palletized loads to an overpacking station, means for depositing a heat-shrinkable sheath on at least the lateral faces of the palletized load, the length is greater than the height of the palletized load providing a vertical extra length intended for attachment to a lower face of a pallet, means for releasing and making accessible the lower face of the pallet and means for heating the sheath, including at the extra length, characterized in that it comprises means for retaining the sheath at the vertical faces of the pallet and / or the load during hooking by heat shrinking of the extra length on the underside of the pallet, the sheath holding means preferably comprising a cold air blowing ramp surrounding the palletized load and located at -above heating means.
  • the invention also relates to a machine, characterized in that it comprises means of traction on the vertical edges of the sheath in directions opposite to the load extending over at least part of the height of the palletized load , traction exerted without contact mechanical with the sheath, preferably the traction means comprise vertical suction outlets located near the edges of the palletized load.
  • the invention also relates to a machine, characterized in that it comprises means for cooling the longer length of the sheath hung on the underside of the pallet before contact with the conveyor, in particular a blowing ramp surrounding the load palletized and arranged horizontally under the heating means.
  • FIGS. 1 to 7 the same references have been used to designate the same elements.
  • the overwrapping machine comprises a conveyor 1 for supplying loads 2 resting on a pallet 3 at an overwrapping station and known means (not shown) for removing a heat-shrinkable sheath 4 covering at least the lateral (vertical) faces of the load and, advantageously, its upper face 5.
  • the machine also includes a thermal insulation bellows reducing energy consumption and standardizing the temperatures, for example as described in FR-2,564,033.
  • FIG. 1a there is shown the palletized load 2 resting on the conveyor 1 of supply and evacuation, covered on its upper face 5 and on its side faces 6 by a sheath 4 not yet retracted.
  • a blowing frame 7 surrounding the load 2, illustrated in more detail in FIG. 7, comprises means 8 for blowing hot air or gas at a temperature, for example, between 200 and 500 ° C. preferably equal to 400 ° C and means 9 for blowing cold air (at room temperature).
  • the means for blowing cold air comprise an upper ramp 9.1 and a lower ramp 9.2.
  • An advantageous distribution of the air flow from the upper ramp 9.1 is illustrated in FIG. 1b. The air flow is distributed substantially uniformly over the entire width of the side faces 6 except in the corners.
  • the machine according to the invention is advantageously provided with traction means 10 exerting traction on the sheath 4 in directions opposite to the load at its vertical edges.
  • the traction means 10 are advantageously without mechanical contact with the sheath, for example suction ramps or means for depositing a first electrostatic charge on the vertical edges of the sheath and electrodes capable of being brought to a second electric charge opposite to the first charge.
  • the air flows of the hot air blowing means 8 and of the lower ramp 9.2 illustrated in FIG. 3b are distributed substantially uniformly over the entire width of the lateral faces 6 of the load 2 including in the corners.
  • the blowing frame 7 by blowing cold air with the upper ramp 9.1.
  • traction is carried out simultaneously on the vertical edges of the sheath with the means 10.
  • the underside of the pallet 3 is released and made accessible.
  • the pallet 3 is raised with a lifting table 13.
  • the conveyor 1 is lowered, the pallet rests at the initial level of the conveyor on pads bearing on its upper floor.
  • FIG. 3a hot air is blown under the pallet with the means 8, which initiates the traction of the film located under the pallet 3.
  • the sheath is maintained simultaneously by blowing cold air with the upper ramp 9.1 and / or by exerting traction on the vertical edges of the sheath 4 by the traction means 10.
  • the traction on the edges of the sheath makes it possible to tension the sheath at the time of the retraction, which avoids the appearance of folds, ensures the regrouping of the extra lengths of the films of the sheath at level of the vertical edges of the load 2 and of the corners of the lower face of the pallet 3, which causes a reinforcement of the overpack in the places which are precisely the most exposed and / or the most stressed during the transport and handling of the load palletized.
  • this traction combined with the blowing of hot air by the means 8 allows the creation of a space 16 of small thickness, for example equal to 30 mm, making it possible to avoid the hot film of the sheath 4 sticking to the load 2, in particular on a polyethylene film for grouping individual packages, such as for example drink packs in cardboard packaging.
  • the space 16 shrinks and cancels out during cooling and, consequently, of the shrinkage of the film of the sheath 4.
  • the pallet 3 is lowered again, as symbolized by the arrow 14 in FIG. 4, the blowing frame 7 being stationary.
  • the conveyor 1 rises in the direction of the underside of the pallet.
  • the means 8 are now located at the lateral faces of the pallet 3, the lower ramp 9.2 is located at the level of the conveyor 1.
  • the upper ramp 9.1 maintains the sheath, the means 8 for blowing hot air ensure the shrinkage of the sheath 4 at the lateral faces of the pallet 3.
  • the part of the sheath 4 located under the pallet 3 has undergone a partial cooling, the retraction is not finished and the film still hot is extremely fragile and may be damaged when placing the palletized load on the conveyor.
  • the cooling of the film located under the pallet 3 before resting the load on the conveyor 1 or raising the conveyor until the context is established with the underside of the pallet.
  • the cooling of the film of the sheath 4 can be ensured, for example, by cooled conformers or advantageously by blowing cold air through the lower ramp 9.2, as illustrated in FIG. 5.
  • the blowing of cold air is stopped by the lower ramps 9.2 and upper 9.1.
  • the frame 7 rises, as symbolized by the arrows 15, of FIG. 6, by blowing hot air by the means 8 to ensure the retraction of the upper part of the sheath without risk of the lower part rising.
  • the traction means 10 are stopped on the edges of the sheath, the blowing of hot air is stopped by the means 8 and the frame 7 is raised to a height greater than that of the upper face of the palletized load. There is also a possible thermal insulation bellows.
  • the conveyor 1 ensures the evacuation of the overwrapped load and the supply of a new load to be overwrapped with which the operations described above are repeated.
  • the present invention mainly applies to the overpacking of palletized loads.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Packages (AREA)

Abstract

The procedure delivers the load to a wrapping position by a conveyor (1). A sleeve (4) is placed over the load to cover at least two of its side faces and so that the lower end of the sleeve projects below the level of the pallet. The pallet is lifted above the conveyor and the projecting end of the sleeve is fixed under it by thermo-shrinking, after which the remainder of the sleeve is heated to shrink it onto the load. During the stage in which the lower end of the sleeve is thermo-shrunk under the pallet the remainder of the sleeve is held against the load without mechanical contact, preferably by blowing cold air onto it through a hollow bar with nozzles. In addition, the lower end of the sleeve is cooled after thermo-shrinking and before replacement on the conveyor to prevent deterioration. <IMAGE>

Description

La présente invention se rapporte à un procédé d'emballage d'une charge par chauffage d'une housse ou gaine thermorétractable et à une machine d'emballage automatique par chauffage d'une housse ou gaine thermorétractable.The present invention relates to a method of packaging a load by heating a heat-shrinkable cover or sheath and to an automatic packaging machine by heating a heat-shrinkable cover or sheath.

L'on réalise habituellement un suremballage d'une charge, notamment palettisée, en recouvrant la charge avec une gaine thermorétractable qui se rétracte et épouse le contour extérieur de la charge lors d'une étape de chauffage suivie par un refroidissement.Usually, an overpack of a load, in particular palletized, is produced by covering the load with a heat-shrinkable sheath which retracts and follows the external contour of the load during a heating step followed by cooling.

Le chauffage de la gaine thermorétractable est typiquement assuré en soufflant des gaz chaud, notamment de l'air ou des gaz de combustion mettant en oeuvre un brûleur, dilués avec de l'air. Le souffle des gaz chaud de rétraction peut déplacer la gaine, ce qui ne permet pas de recouvrir uniformément toute la charge. De plus, la rétraction, diminuant non seulement le périmètre mais également la hauteur de la gaine, provoque la remontée de son bord inférieur qui n'assure plus une bonne protection de la partie basse de la charge. Ainsi, la Société MSK a proposé dans le Brevet EP-0 133 462 un dispositif d'emballage comportant une table élévatrice comprenant des moyens d'aspiration. La charge palettisée est soulevée du transporteur donnant accès à la face inférieure de la palette. L'aspiration centrale oriente le bord inférieur de la gaine vers le centre de la face inférieure de la palette lors du soufflage simultané d'air chaud assurant la rétraction dudit bord inférieur de la gaine. La table élévatrice est ensuite abaissée et la palette est reposée sur le transporteur.The heating of the heat-shrinkable sheath is typically ensured by blowing hot gases, in particular air or combustion gases using a burner, diluted with air. The blast of hot shrink gases can displace the sheath, which does not evenly cover the entire load. In addition, the retraction, reducing not only the perimeter but also the height of the sheath, causes the rise of its lower edge which no longer provides good protection of the lower part of the load. Thus, the MSK Company proposed in Patent EP-0 133 462 a packaging device comprising a lifting table comprising suction means. The palletized load is lifted from the transporter giving access to the underside of the pallet. The central suction directs the lower edge of the sheath towards the center of the lower face of the pallet during the simultaneous blowing of hot air ensuring the retraction of said lower edge of the sheath. The lifting table is then lowered and the pallet is put back on the conveyor.

Le dispositif du Brevet EP-0 133 462 présente de nombreux inconvénients. La table élévatrice aspirante est un élément très complexe. De plus, son fonctionnement perturbe la répartition de l'air chaud ne permettant pas une rétraction de qualité du bord inférieur de la gaine. L'aspiration assure un plissage du bord inférieur de la gaine vers le centre de la face inférieure de la palette. Les plis, après rétraction, forment des zones d'épaisseur irrégulière comportant des zones de plus faible résistance mécanique. La palette est reposée sur le transporteur alors que le film de la gaine se trouvant sous la face inférieure de la palette est encore chaud et, partant, fragile. Le contact avec le transporteur détériore le film qui, avant son refroidissement, n'est pas capable de supporter le poids de la charge palettisée.The device of Patent EP-0 133 462 has many drawbacks. The suction lift table is a very complex element. In addition, its operation disrupts the distribution of hot air not allowing a quality retraction of the lower edge of the sheath. The suction ensures a pleating of the lower edge of the sheath towards the center of the lower face of the pallet. The folds, after retraction, form zones of irregular thickness comprising zones of lower mechanical resistance. The pallet is rested on the conveyor while the film of the sheath located under the underside of the pallet is still hot and, therefore, fragile. The contact with the transporter deteriorates the film which, before cooling, is unable to support the weight of the palletized load.

La stabilité de la charge risque d'être compromise par le fait que l'on lève la palette par des plots disposés sous le plancher supérieur de la palette.The stability of the load may be compromised by the fact that the pallet is lifted by studs arranged under the upper floor of the pallet.

C'est par conséquent un but de la présente invention d'offrir une gaine thermorétractable recouvrant complètement la charge dont elle assure la protection et la cohésion.It is therefore an object of the present invention to provide a heat-shrinkable sheath completely covering the load for which it provides protection and cohesion.

C'est également un but de la présente invention d'offrir une gaine solide, notamment dans sa partie inférieure.It is also an object of the present invention to provide a solid sheath, in particular in its lower part.

C'est aussi un but de la présente invention d'offrir une gaine présentant un bel aspect.It is also an object of the present invention to provide a sheath having a beautiful appearance.

C'est également un but de la présente invention d'offrir une telle gaine mettant en oeuvre une faible quantité de film thermorétractable.It is also an object of the present invention to provide such a sheath using a small amount of heat-shrinkable film.

C'est aussi un but de la présente invention d'offrir une telle gaine ne collant pas sur la charge et notamment sur un film de groupage de fardeaux individuels, notamment en polyéthylène.It is also an object of the present invention to provide such a sheath that does not stick to the load and in particular to a film for grouping individual burdens, in particular made of polyethylene.

C'est également un but de la présente invention d'offrir un procédé de suremballage minimisant les risques de dislocation de la palette lors de sa manutention.It is also an object of the present invention to offer an overpacking process minimizing the risks of dislocation of the pallet during its handling.

Ces buts sont atteints selon l'invention en assurant, de préférence, par soufflage le maintien sous la palette du bord inférieur de la gaine pendant son accrochage et antérieurement à la rétraction de la gaine au niveau de la charge.These objects are achieved according to the invention by preferably ensuring, by blowing, that the lower edge of the sheath is held under the pallet during its attachment and prior to the retraction of the sheath at the level of the load.

Avantageusement, l'on regroupe la surlongueur de la gaine au niveau des coins de la palette et/ou des arêtes de la charge palettisée.Advantageously, the excess length of the sheath is grouped at the corners of the pallet and / or of the edges of the palletized load.

Avantageusement, l'on assure le refroidissement du film thermorétractable de la gaine se trouvant sous la face inférieure de la palette antérieurement à la pose de celle-ci sur le transporteur.Advantageously, it provides cooling of the heat-shrinkable film of the sheath located under the underside of the pallet prior to the installation of the latter on the conveyor.

Avantageusement, I'accès à la face inférieure de la palette est obtenu en abaissant le transporteur de la palette reposant sur des plots d'une table.Advantageously, access to the underside of the pallet is obtained by lowering the pallet transporter resting on the pads of a table.

L'invention a principalement pour objet un procédé de suremballage d'une charge palettisée comportant les étapes consistant à :

  • a) amener la charge à un poste de suremballage, notamment par un convoyeur ;
  • b) déposer une gaine thermorétractable sur au moins les faces latérales de la charge, la longueur de la gaine étant supérieure à la hauteur de la charge palettisée ménageant une surlongueur verticale destinée à l'accrochage sur une face inférieure d'une palette supportant la charge ;
  • c) dégager la face inférieure de la palette ;
  • d) accrocher par thermorétraction la surlongueur verticale de la gaine sur la face inférieure de la palette ;
  • e) poser la charge sur le convoyeur ;
  • f) chauffer le reste de la gaine pour en assurer la rétraction, caractérisé en ce que lors de l'étape d) d'accrochage par thermorétraction de la surlongueur de la face inférieure de la palette, l'on assure le maintien de la gaine au niveau des faces verticales de la palette et/ou de la charge.
The main object of the invention is a method of overpacking a palletized load comprising the steps consisting in:
  • a) bringing the load to an overpacking station, in particular by a conveyor;
  • b) deposit a heat-shrinkable sheath on at least the lateral faces of the load, the length of the sheath being greater than the height of the palletized load providing a vertical extra length intended for attachment to a lower face of a pallet supporting the load ;
  • c) clear the underside of the pallet;
  • d) heat-shrink the vertical excess length of the sheath on the underside of the pallet;
  • e) place the load on the conveyor;
  • f) heating the rest of the sheath to ensure its retraction, characterized in that during step d) hooking by heat-shrinking the extra length of the underside of the pallet, the sheath is maintained at the vertical faces of the pallet and / or the load.

L'invention a également pour objet un procédé de suremballage, caractérisé en ce que le maintien de la gaine est assuré sans contact mécanique, de préférence par soufflage d'air froid par une rampe située au-dessus des moyens de soufflage d'air chaud assurant l'accrochage par thermorétraction de la surlongueur verticale sur la face inférieure de la palette.The invention also relates to an overpacking process, characterized in that the maintenance of the sheath is ensured without mechanical contact, preferably by blowing cold air by a ramp located above the means for blowing hot air. ensuring the attachment by heat-shrinking of the vertical extra length on the underside of the pallet.

L'invention a également pour objet un procédé, caractérisé en ce qu'il comporte, en outre, une étape de traction sur les arêtes verticales de la gaine en direction opposée à celle de la charge, de préférence sans contact mécanique.The invention also relates to a method, characterized in that it further comprises a step of pulling on the vertical edges of the sheath in the direction opposite to that of the load, preferably without mechanical contact.

L'invention a également pour objet un procédé de suremballage, caractérisé en ce que la traction sur les arêtes de la gaine est effectuée par aspiration d'air.The invention also relates to an overpacking process, characterized in that the traction on the edges of the sheath is carried out by air suction.

L'invention a également pour objet un procédé de suremballage, caractérisé en ce qu'il comporte, en outre, à la fin de l'étape d) d'accrochage par thermorétraction de la surlongueur sur la face inférieure de la palette et avant l'étape e) de pose de la charge sur le convoyeur, une étape g) consistant en un refroidissement de la surlongueur de la gaine se trouvant sous la face inférieure de la palette améliorant sa résistance mécanique et évitant sa détérioration lors de l'étape e).The invention also relates to an overpacking process, characterized in that it further comprises, at the end of step d) hooking by heat shrinking the extra length on the underside of the pallet and before the step e) of placing the load on the conveyor, step g) consisting of cooling the excess length of the sheath located under the underside of the pallet improving its mechanical strength and preventing its deterioration during step e ).

L'invention a également pour objet un procédé, caractérisé en ce que le refroidissement de la surlongueur de la gaine se trouvant sous la face inférieure de la palette est effectué par soufflage d'air froid, de préférence à partir d'une rampe située sous les moyens de soufflage d'air chaud de rétraction.The invention also relates to a method, characterized in that the cooling of the excess length of the sheath located under the underside of the pallet is carried out by blowing cold air, preferably from a ramp located under the means for blowing hot retraction air.

L'invention a également pour objet un procédé, caractérisé en ce qu'il comporte, après l'étape b) de dépose d'une gaine thermorétractable sur la charge palettisée, une étape h) de lissage de la gaine, de préférence par translation de haut en bas sur la hauteur de la charge palettisée d'une rampe de soufflage d'air froid entourant sensiblement la charge palettisée.The invention also relates to a method, characterized in that it comprises, after step b) of depositing a heat-shrinkable sheath on the palletized load, a step h) of smoothing the sheath, preferably by translation from top to bottom over the height of the palletized load of a cold air blowing ramp substantially surrounding the palletized load.

L'invention a également pour objet un procédé, caractérisé en ce qu'à l'étape c) on abaisse le convoyeur, la palette reposant sur un support, de préférence un support prenant appui sur le plancher supérieur de la palette.The invention also relates to a method, characterized in that in step c) the conveyor is lowered, the pallet resting on a support, preferably a support bearing on the upper floor of the pallet.

L'invention a également pour objet un procédé, caractérisé en ce qu'à l'étape c), on soulève la palette du convoyeur, de préférence à l'aide d'une table élévatrice prenant appui sur le plancher supérieur de la palette.The invention also relates to a method, characterized in that in step c), the pallet of the conveyor is lifted, preferably using a lifting table bearing on the upper floor of the pallet.

L'invention a également pour objet une machine de suremballage de charge palettisée comportant un convoyeur d'amenée de charges palettisées à un poste de suremballage, des moyens de dépose d'une gaine thermorétractable sur au moins les faces latérales de la charge palettisée dont la longueur est supérieure à la hauteur de la charge palettisée ménageant une surlongueur verticale destinée à l'accrochage sur une face inférieure d'une palette, des moyens pour dégager et rendre accessible la face inférieure de la palette et des moyens de chauffage de la gaine, y compris au niveau de la surlongueur, caractérisée en ce qu'elle comporte des moyens de maintien de la gaine au niveau des faces verticales de la palette et/ou de la charge lors de l'accrochage par thermorétraction de la surlongueur sur la face inférieure de la palette, les moyens de maintien de la gaine comportant, de préférence, une rampe de soufflage d'air froid entourant la charge palettisée et située au-dessus des moyens de chauffage.The invention also relates to a palletised load overwrapping machine comprising a conveyor for supplying palletized loads to an overpacking station, means for depositing a heat-shrinkable sheath on at least the lateral faces of the palletized load, the length is greater than the height of the palletized load providing a vertical extra length intended for attachment to a lower face of a pallet, means for releasing and making accessible the lower face of the pallet and means for heating the sheath, including at the extra length, characterized in that it comprises means for retaining the sheath at the vertical faces of the pallet and / or the load during hooking by heat shrinking of the extra length on the underside of the pallet, the sheath holding means preferably comprising a cold air blowing ramp surrounding the palletized load and located at -above heating means.

L'invention a également pour objet une machine, caractérisée en ce qu'elle comporte des moyens de traction sur les arêtes verticales de la gaine dans des directions opposées à la charge s'étendant sur au moins une partie de la hauteur de la charge palettisée, la traction s'exerçant sans contact mécanique avec la gaine, de préférence les moyens de traction comportent des bouches d'aspiration verticales situées à proximité des arêtes de la charge palettisée.The invention also relates to a machine, characterized in that it comprises means of traction on the vertical edges of the sheath in directions opposite to the load extending over at least part of the height of the palletized load , traction exerted without contact mechanical with the sheath, preferably the traction means comprise vertical suction outlets located near the edges of the palletized load.

L'invention a également pour objet une machine, caractérisée en ce qu'elle comporte des moyens de refroidissement de la surlongueur de la gaine accrochée sur la face inférieure de la palette avant le contact avec le convoyeur, notamment une rampe de soufflage entourant la charge palettisée et disposée horizontalement sous les moyens de chauffage.The invention also relates to a machine, characterized in that it comprises means for cooling the longer length of the sheath hung on the underside of the pallet before contact with the conveyor, in particular a blowing ramp surrounding the load palletized and arranged horizontally under the heating means.

L'invention sera mieux comprise au moyen de la description ci-après et des figures annexées données comme des exemples non limitatifs et sur lesquelles :

  • la figure 1a est une vue schématique en élévation d'une première étape de suremballage selon l'invention ;
  • la figure 1b est une vue en plan du cadre de soufflage mis en oeuvre selon la présente invention ;
  • la figure 2 est une vue schématique en élévation d'une deuxième étape de suremballage selon l'invention ;
  • la figure 3a est une vue schématique en élévation d'une troisième étape de suremballage selon l'invention ;
  • la figure 3b est une vue en plan d'un cadre de soufflage d'air chaud mis en oeuvre dans la présente invention ;
  • la figure 4 est une vue schématique en élévation d'une quatrième étape de suremballage selon l'invention ;
  • la figure 5 est une vue schématique en élévation d'une cinquième étape de suremballage selon l'invention ;
  • la figure 6 est une vue schématique en élévation d'une sixième étape de suremballage selon l'invention ;
  • la figure 7 est une vue en coupe verticale d'un détail d'un cadre de soufflage mis en oeuvre dans l'appareil de suremballage selon la présente invention.
The invention will be better understood by means of the description below and the appended figures given as nonlimiting examples and in which:
  • Figure 1a is a schematic elevational view of a first overpacking step according to the invention;
  • Figure 1b is a plan view of the blowing frame used according to the present invention;
  • Figure 2 is a schematic elevational view of a second overpacking step according to the invention;
  • Figure 3a is a schematic elevational view of a third overpacking step according to the invention;
  • Figure 3b is a plan view of a hot air blowing frame used in the present invention;
  • Figure 4 is a schematic elevational view of a fourth overpacking step according to the invention;
  • Figure 5 is a schematic elevational view of a fifth overpacking step according to the invention;
  • Figure 6 is a schematic elevational view of a sixth overpacking step according to the invention;
  • Figure 7 is a vertical sectional view of a detail of a blowing frame used in the overpacking apparatus according to the present invention.

Sur les figures 1 à 7, l'on a utilisé les mêmes références pour désigner les mêmes éléments.In FIGS. 1 to 7, the same references have been used to designate the same elements.

La machine de suremballage selon l'invention comporte un convoyeur 1 d'amenée de charges 2 reposant sur une palette 3 à un poste de suremballage et des moyens connus (non représentés) des déposes d'une gaine 4 thermorétractable recouvrant au moins les faces latérales (verticales) de la charge et, avantageusement, sa face supérieure 5.The overwrapping machine according to the invention comprises a conveyor 1 for supplying loads 2 resting on a pallet 3 at an overwrapping station and known means (not shown) for removing a heat-shrinkable sheath 4 covering at least the lateral (vertical) faces of the load and, advantageously, its upper face 5.

Avantageusement, la machine comporte également un soufflet d'isolation thermique diminuant la consommation énergétique et uniformisant les températures, par exemple tel que décrit dans FR-2 564 033.Advantageously, the machine also includes a thermal insulation bellows reducing energy consumption and standardizing the temperatures, for example as described in FR-2,564,033.

Sur la figure 1a, l'on a représenté la charge palettisée 2 reposant sur le convoyeur 1 d'amenée et d'évacuation, recouverte sur sa face supérieure 5 et sur ses faces latérales 6 par une gaine 4 non encore rétractée. Un cadre de soufflage 7 entourant la charge 2, illustré plus en détail sur la figure 7, comporte des moyens 8 de soufflage d'air ou de gaz chaud à une température, par exemple, comprise entre 200 et 500°C de préférence égale à 400°C et des moyens 9 de soufflage d'air froid (à température ambiante). Avantageusement, les moyens de soufflage d'air froid comportent une rampe supérieure 9.1 et une rampe inférieure 9.2. Une répartition avantageuse du flux d'air de la rampe supérieure 9.1 est illustrée sur la figure 1b. Le flux d'air est réparti sensiblement uniformément sur toute la largeur des faces latérales 6 sauf dans les angles. Au contraire, la machine selon l'invention est avantageusement munie de moyens de traction 10 exerçant une traction sur la gaine 4 dans des directions opposées à la charge au niveau de ses arêtes verticales. Les moyens de traction 10 sont, avantageusement, sans contact mécanique avec la gaine, par exemple des rampes d'aspiration ou des moyens pour déposer une première charge électrostatique sur les arêtes verticales de la gaine et des électrodes susceptibles d'être portées à une deuxième charge électrique opposée à la première charge.In Figure 1a, there is shown the palletized load 2 resting on the conveyor 1 of supply and evacuation, covered on its upper face 5 and on its side faces 6 by a sheath 4 not yet retracted. A blowing frame 7 surrounding the load 2, illustrated in more detail in FIG. 7, comprises means 8 for blowing hot air or gas at a temperature, for example, between 200 and 500 ° C. preferably equal to 400 ° C and means 9 for blowing cold air (at room temperature). Advantageously, the means for blowing cold air comprise an upper ramp 9.1 and a lower ramp 9.2. An advantageous distribution of the air flow from the upper ramp 9.1 is illustrated in FIG. 1b. The air flow is distributed substantially uniformly over the entire width of the side faces 6 except in the corners. On the contrary, the machine according to the invention is advantageously provided with traction means 10 exerting traction on the sheath 4 in directions opposite to the load at its vertical edges. The traction means 10 are advantageously without mechanical contact with the sheath, for example suction ramps or means for depositing a first electrostatic charge on the vertical edges of the sheath and electrodes capable of being brought to a second electric charge opposite to the first charge.

Au contraire, les flux d'air des moyens de soufflage d'air chaud 8 et de la rampe inférieure 9.2 illustrés sur la figure 3b sont répartis sensiblement uniformément sur toute la largeur des faces latérales 6 de la charge 2 y compris dans les angles.On the contrary, the air flows of the hot air blowing means 8 and of the lower ramp 9.2 illustrated in FIG. 3b are distributed substantially uniformly over the entire width of the lateral faces 6 of the load 2 including in the corners.

Il est avantageux de lisser tout d'abord la gaine 4 sur la charge 2 en faisant défiler de haut en bas, comme symbolisé par les flèches 11 sur la figure 1a, le cadre soufflant 7 en soufflant de l'air froid avec la rampe supérieure 9.1. Avantageusement, l'on effectue simultanément une traction sur les arêtes verticales de la gaine avec les moyens 10. Simultanément ou après le lissage de la gaine, l'on dégage et rend accessible la face inférieure de la palette 3. Dans un premier exemple, comme symbolisé par la flèche 12 de la figure 2, l'on élève la palette 3 avec une table élévatrice 13. Dans un deuxième exemple de réalisation non illustré, l'on descend le convoyeur 1, la palette repose au niveau initial du convoyeur sur des plots prenant appui sur son plancher supérieur.It is advantageous to first smooth the sheath 4 on the load 2 by scrolling from top to bottom, as symbolized by the arrows 11 in FIG. 1a, the blowing frame 7 by blowing cold air with the upper ramp 9.1. Advantageously, traction is carried out simultaneously on the vertical edges of the sheath with the means 10. Simultaneously or after the smoothing of the sheath, the underside of the pallet 3 is released and made accessible. In a first example, as symbolized by arrow 12 in FIG. 2, the pallet 3 is raised with a lifting table 13. In a second embodiment not shown, the conveyor 1 is lowered, the pallet rests at the initial level of the conveyor on pads bearing on its upper floor.

Sur la figure 3a, l'on souffle de l'air chaud sous la palette avec les moyens 8, ce qui amorce la traction du film se trouvant sous la palette 3. Avantageusement, l'on assure simultanément le maintien de la gaine en soufflant de l'air froid avec la rampe supérieure 9.1 et/ou en exerçant une traction sur les arêtes verticales de la gaine 4 par les moyens de traction 10.In FIG. 3a, hot air is blown under the pallet with the means 8, which initiates the traction of the film located under the pallet 3. Advantageously, the sheath is maintained simultaneously by blowing cold air with the upper ramp 9.1 and / or by exerting traction on the vertical edges of the sheath 4 by the traction means 10.

La traction sur les arêtes de la gaine, avantageusement sur toute la hauteur de la charge 2, permet de tendre la gaine au moment de la rétraction, ce qui évite l'apparition de plis, assure le regroupement des surlongueurs des films de la gaine au niveau des arêtes verticales de la charge 2 et des coins de la face inférieure de la palette 3, ce qui provoque un renforcement du suremballage aux endroits qui justement sont le plus exposés et/ou les plus sollicités lors du transport et des manutentions de la charge palettisée. De plus, cette traction combinée avec le soufflage d'air chaud par les moyens 8 permet la création d'un espace 16 de faible épaisseur, par exemple égal à 30 mm permettant d'éviter le collage du film chaud de la gaine 4 sur la charge 2, notamment sur un film en polyéthylène de groupage de colis individuels, comme par exemple des packs de boisson en emballage carton. L'espace 16 se rétréci et s'annule lors du refroidissement et, partant, de la rétraction du film de la gaine 4.The traction on the edges of the sheath, advantageously over the entire height of the load 2, makes it possible to tension the sheath at the time of the retraction, which avoids the appearance of folds, ensures the regrouping of the extra lengths of the films of the sheath at level of the vertical edges of the load 2 and of the corners of the lower face of the pallet 3, which causes a reinforcement of the overpack in the places which are precisely the most exposed and / or the most stressed during the transport and handling of the load palletized. In addition, this traction combined with the blowing of hot air by the means 8 allows the creation of a space 16 of small thickness, for example equal to 30 mm, making it possible to avoid the hot film of the sheath 4 sticking to the load 2, in particular on a polyethylene film for grouping individual packages, such as for example drink packs in cardboard packaging. The space 16 shrinks and cancels out during cooling and, consequently, of the shrinkage of the film of the sheath 4.

L'on redescend la palette 3, comme symbolisé par la flèche 14 de la figure 4, le cadre de soufflage 7 étant immobile. Dans la deuxième variante de réalisation non illustrée, le convoyeur 1 remonte en direction de la face inférieure de la palette. Les moyens 8 se trouvent désormais au niveau des faces latérales de la palette 3, la rampe inférieure 9.2 se trouve au niveau du convoyeur 1. Ainsi, la rampe supérieure 9.1 assure le maintien de la gaine, les moyens 8 de soufflage d'air chaud assurent la rétraction de la gaine 4 au niveau des faces latérales de la palette 3. Pendant ce temps, la partie de la gaine 4 se trouvant sous la palette 3 a subi un refroidissement partiel, la rétraction n'est pas terminée et le film encore chaud est extrêmement fragile et risque d'être détérioré lors de la pose de la charge palettisée sur le convoyeur. Ainsi, il est avantageux d'assurer un refroidissement du film se trouvant sous la palette 3 avant de reposer la charge sur le convoyeur 1 ou de faire remonter le convoyeur jusqu'à l'établissement du contexte avec la face inférieure de la palette. Le refroidissement du film de la gaine 4 peut être assuré, par exemple, par des conformateurs refroidis ou avantageusement par soufflage d'air froid par la rampe inférieure 9.2, comme illustré sur la figure 5. Lorsque la charge palettisée repose sur le convoyeur, la gaine 4 étant fermement maintenue dans sa partie inférieure, l'on arrête le soufflage d'air froid par les rampes inférieures 9.2 et supérieures 9.1. Le cadre 7 remonte, comme symbolisé par les flèches 15, de la figure 6, en soufflant de l'air chaud par les moyens 8 pour assurer la rétraction de la partie haute de la gaine sans risque de remontée de la partie basse.The pallet 3 is lowered again, as symbolized by the arrow 14 in FIG. 4, the blowing frame 7 being stationary. In the second variant embodiment not shown, the conveyor 1 rises in the direction of the underside of the pallet. The means 8 are now located at the lateral faces of the pallet 3, the lower ramp 9.2 is located at the level of the conveyor 1. Thus, the upper ramp 9.1 maintains the sheath, the means 8 for blowing hot air ensure the shrinkage of the sheath 4 at the lateral faces of the pallet 3. During this time, the part of the sheath 4 located under the pallet 3 has undergone a partial cooling, the retraction is not finished and the film still hot is extremely fragile and may be damaged when placing the palletized load on the conveyor. Thus, it is advantageous to provide cooling of the film located under the pallet 3 before resting the load on the conveyor 1 or raising the conveyor until the context is established with the underside of the pallet. The cooling of the film of the sheath 4 can be ensured, for example, by cooled conformers or advantageously by blowing cold air through the lower ramp 9.2, as illustrated in FIG. 5. When the palletized load rests on the conveyor, the duct 4 being firmly held in its lower part, the blowing of cold air is stopped by the lower ramps 9.2 and upper 9.1. The frame 7 rises, as symbolized by the arrows 15, of FIG. 6, by blowing hot air by the means 8 to ensure the retraction of the upper part of the sheath without risk of the lower part rising.

L'on arrête les moyens 10 de traction sur les arêtes de la gaine, l'on arrête le soufflage d'air chaud par les moyens 8 et l'on remonte le cadre 7 à une hauteur supérieure à celle de la face supérieure de la charge palettisée. L'on remonte également un éventuel soufflet d'isolation thermique. Le convoyeur 1 assure l'évacuation de la charge suremballée et l'amenée d'une nouvelle charge à suremballer avec laquelle l'on répète les opérations précédemment décrites.The traction means 10 are stopped on the edges of the sheath, the blowing of hot air is stopped by the means 8 and the frame 7 is raised to a height greater than that of the upper face of the palletized load. There is also a possible thermal insulation bellows. The conveyor 1 ensures the evacuation of the overwrapped load and the supply of a new load to be overwrapped with which the operations described above are repeated.

La présente invention s'applique principalement au suremballage des charges palettisées.The present invention mainly applies to the overpacking of palletized loads.

Claims (12)

Procédé de suremballage d'une charge palettisée (2) comportant les étapes consistant à : a) amener la charge (2) à un poste de suremballage, notamment par un convoyeur (1) ; b) déposer une gaine thermorétractable sur au moins les faces latérales (6) de la charge (2), la longueur de la gaine étant supérieure à la hauteur de la charge palettisée ménageant une surlongueur verticale destinée à l'accrochage sur une face inférieure d'une palette (3) supportant la charge (2) ; c) dégager la face inférieure de la palette (3) ; d) accrocher par thermorétraction la surlongueur verticale de la gaine (4) sur la face inférieure de la palette (3) ; e) poser la charge sur le convoyeur (1) ; f) chauffer le reste de la gaine (4) pour en assurer la rétraction, caractérisé en ce que lors de l'étape d) d'accrochage par thermorétraction de la surlongueur de la face inférieure de la palette (3), l'on assure le maintien de la gaine (4) au niveau des faces verticales de la palette (3) et/ou de la charge (2).Method for overpacking a palletized load (2) comprising the steps consisting in: a) bringing the load (2) to an overpacking station, in particular by a conveyor (1); b) deposit a heat-shrinkable sheath on at least the lateral faces (6) of the load (2), the length of the sheath being greater than the height of the palletized load providing a vertical extra length intended for attachment to a lower face d 'a pallet (3) supporting the load (2); c) release the underside of the pallet (3); d) heat-shrink the vertical excess length of the sheath (4) on the underside of the pallet (3); e) place the load on the conveyor (1); f) heating the rest of the sheath (4) to ensure its retraction, characterized in that during step d) hooking by heat-shrinking the extra length of the lower face of the pallet (3), the sheath (4) is maintained at the level of the vertical faces of the pallet (3) and / or the load (2). Procédé de suremballage selon la revendication 1, caractérisé en ce que le maintien de la gaine (4) est assuré sans contact mécanique, de préférence par soufflage d'air froid par une rampe (9.1) située au-dessus des moyens (8) de soufflage d'air chaud assurant l'accrochage par thermorétraction de la surlongueur verticale sur la face inférieure de la palette (3).Overpacking method according to claim 1, characterized in that the holding of the sheath (4) is ensured without mechanical contact, preferably by blowing cold air by a ramp (9.1) located above the means (8) of blowing of hot air ensuring the attachment by heat-shrinking of the vertical extra length on the underside of the pallet (3). Procédé selon la revendication 1 ou 2, caractérisé en ce qu'il comporte, en outre, une étape de traction sur les arêtes verticales de la gaine en direction opposée à celle de la charge (2), de préférence sans contact mécanique.Method according to claim 1 or 2, characterized in that it further comprises a step of pulling on the vertical edges of the sheath in the direction opposite to that of the load (2), preferably without mechanical contact. Procédé de suremballage selon la revendication 3, caractérisé en ce que la traction sur les arêtes de la gaine (4) est effectuée par aspiration d'air.Overpacking method according to claim 3, characterized in that the traction on the edges of the sheath (4) is carried out by air suction. Procédé de suremballage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte, en outre, à la fin de l'étape d) d'accrochage par thermorétraction de la surlongueur sur la face inférieure de la palette (3) et avant l'étape e) de pose de la charge sur le convoyeur (1), une étape g) consistant en un refroidissement de la surlongueur de la gaine se trouvant sous la face inférieure de la palette (3) améliorant sa résistance mécanique et évitant sa détérioration lors de l'étape e).Overpacking method according to any one of the preceding claims, characterized in that it further comprises, at the end from step d) hooking by heat-shrinking the extra length on the underside of the pallet (3) and before step e) of placing the load on the conveyor (1), a step g) consisting of a cooling of the longer length of the sheath located under the underside of the pallet (3) improving its mechanical strength and preventing its deterioration during step e). Procédé selon la revendication 5, caractérisé en ce que le refroidissement de la surlongueur de la gaine se trouvant sous la face inférieure de la palette est effectué par soufflage d'air froid, de préférence à partir d'une rampe (9.2) située sous les moyens (8) de soufflage d'air chaud de rétraction.Method according to claim 5, characterized in that the cooling of the excess length of the sheath located under the underside of the pallet is carried out by blowing cold air, preferably from a ramp (9.2) located under the means (8) for blowing hot retraction air. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte, après l'étape b) de dépose d'une gaine thermorétractable sur la charge palettisée, une étape h) de lissage de la gaine (4), de préférence par translation de haut en bas sur la hauteur de la charge palettisée (2) d'une rampe de soufflage d'air froid (9.1) entourant sensiblement la charge palettisée.Method according to any one of the preceding claims, characterized in that, after step b) of depositing a heat-shrinkable sheath on the palletized load, a step h) of smoothing the sheath (4), preferably by translation from top to bottom over the height of the palletized load (2) of a cold air blowing ramp (9.1) substantially surrounding the palletized load. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'à l'étape c) on abaisse le convoyeur (1), la palette (3) reposant sur un support, de préférence un support prenant appui sur le plancher supérieur de la palette (31).Method according to any one of claims 1 to 7, characterized in that in step c) the conveyor (1) is lowered, the pallet (3) resting on a support, preferably a support bearing on the floor upper of the pallet (31). Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'à l'étape c), on soulève la palette (3) du convoyeur (1), de préférence à l'aide d'une table élévatrice (13) prenant appui sur le plancher supérieur de la palette (3).Method according to any one of Claims 1 to 7, characterized in that in stage c), the pallet (3) is lifted from the conveyor (1), preferably using a lifting table (13 ) resting on the upper floor of the pallet (3). Machine de suremballage de charge palettisée comportant un convoyeur (1) d'amenée de charges palettisées à un poste de suremballage, des moyens de dépose d'une gaine thermorétractable (4) sur au moins les faces latérales (6) de la charge palettisée (2) dont la longueur est supérieure à la hauteur de la charge palettisée ménageant une surlongueur verticale destinée à l'accrochage sur une face inférieure d'une palette (3), des moyens pour dégager et rendre accessible la face inférieure de la palette (3) et des moyens de chauffage de la gaine (4), y compris au niveau de la surlongueur, caractérisée en ce qu'elle comporte des moyens de maintien de la gaine (4) au niveau des faces verticales de la palette (3) et/ou de la charge (2) lors de l'accrochage par thermorétraction de la surlongueur sur la face inférieure de la palette (3), les moyens de maintien de la gaine (4) comportant, de préférence, une rampe (9.1) de soufflage d'air froid entourant la charge palettisée et située au-dessus des moyens de chauffage (8).Palletized load overwrapping machine comprising a conveyor (1) for bringing palletized loads to an overwrapping station, means for depositing a heat-shrinkable sheath (4) on at least the lateral faces (6) of the palletized load ( 2) whose length is greater than the height of the palletized load providing a vertical extra length intended for attachment to a lower face of a pallet (3), means for releasing and making accessible the lower face of the pallet (3 ) and means for heating the sheath (4), including at the extra length, characterized in that it comprises means for holding the sheath (4) at the vertical faces of the pallet (3) and / or the load (2) during attachment by heat-shrinking the extra length on the underside of the pallet (3), the sheath holding means (4) preferably comprising a ramp (9.1) for blowing cold air surrounding the palletized load and located above the heating means (8). Machine selon la revendication 10, caractérisée en ce qu'elle comporte des moyens de traction sur les arêtes verticales de la gaine (4) dans des directions opposées à la charge (2) s'étendant sur au moins une partie de la hauteur de la charge palettisée, la traction s'exerçant sans contact mécanique avec la gaine (4), de préférence les moyens de traction comportent des bouches d'aspiration verticales situées à proximité des arêtes de la charge palettisée (2).Machine according to claim 10, characterized in that it comprises means of traction on the vertical edges of the sheath (4) in directions opposite to the load (2) extending over at least part of the height of the palletized load, the traction being exerted without mechanical contact with the sheath (4), preferably the traction means comprise vertical suction outlets located near the edges of the palletized load (2). Machine selon la revendication 8 ou 9, caractérisée en ce qu'elle comporte des moyens de refroidissement de la surlongueur de la gaine (4) accrochée sur la face inférieure de la palette (3) avant le contact avec le convoyeur (1), notamment une rampe de soufflage (9.2) entourant la charge palettisée et disposée horizontalement sous les moyens de chauffage (8).Machine according to claim 8 or 9, characterized in that it comprises means for cooling the excess length of the sheath (4) hung on the underside of the pallet (3) before contact with the conveyor (1), in particular a blowing ramp (9.2) surrounding the palletized load and arranged horizontally under the heating means (8).
EP95400868A 1994-04-22 1995-04-19 Machine and method for packaging a palettized load by means of a heat shrinkable sleeve Ceased EP0678452A1 (en)

Applications Claiming Priority (2)

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FR9404862 1994-04-22
FR9404862A FR2719019B1 (en) 1994-04-22 1994-04-22 Method for packaging a load using a heat-shrinkable sheath and packaging machine using such a method.

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FR2792609A1 (en) * 1999-04-26 2000-10-27 Thimon HANDLING DEVICE FOR LAYING A HEAT-SHRINKABLE PLASTIC SHEATH ON A PALLETIZED LOAD
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CN104787397A (en) * 2014-01-16 2015-07-22 珠海格力电器股份有限公司 Heat shrinkage method for packaging bag of water chilling unit
CN110641788A (en) * 2019-09-03 2020-01-03 稳健医疗(嘉鱼)有限公司 Automatic packaging system for compressed towels
CN110834771A (en) * 2019-11-22 2020-02-25 安徽永锋智能包装科技有限公司 Bottom-closing method for transparent packaging bag of refrigerator

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EP0283541A1 (en) * 1987-03-26 1988-09-28 VFI Gesellschaft für Verpackungstechnik mbH Method and apparatus for shrinking a plastic hood around a palletized load
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FR2082861A5 (en) * 1970-03-25 1971-12-10 Hurdequint Louis Shrink-wrapping oven - drops over a pack to shrink the bag mouth uniformly using directional hot air jets
EP0283541A1 (en) * 1987-03-26 1988-09-28 VFI Gesellschaft für Verpackungstechnik mbH Method and apparatus for shrinking a plastic hood around a palletized load
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FR2792609A1 (en) * 1999-04-26 2000-10-27 Thimon HANDLING DEVICE FOR LAYING A HEAT-SHRINKABLE PLASTIC SHEATH ON A PALLETIZED LOAD
EP1048571A1 (en) * 1999-04-26 2000-11-02 Société Thimon Apparatus for packaging a palettized load by means of a heat shrinkable sleeve
DE102006058025A1 (en) * 2006-12-07 2008-06-19 Krones Ag Device for generating process heat for a packaging device
US8807130B2 (en) 2006-12-07 2014-08-19 Krones Ag Apparatus for generating process heat for a packaging arrangement
CN104787397A (en) * 2014-01-16 2015-07-22 珠海格力电器股份有限公司 Heat shrinkage method for packaging bag of water chilling unit
CN110641788A (en) * 2019-09-03 2020-01-03 稳健医疗(嘉鱼)有限公司 Automatic packaging system for compressed towels
CN110834771A (en) * 2019-11-22 2020-02-25 安徽永锋智能包装科技有限公司 Bottom-closing method for transparent packaging bag of refrigerator

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FR2719019A1 (en) 1995-10-27
FR2719019B1 (en) 1996-05-31

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