EP0678452A1 - Vorrichtung und Verfahren zum Verpacken einer palettisierten Ladung mittels eines Heissschrumpfschlauches - Google Patents

Vorrichtung und Verfahren zum Verpacken einer palettisierten Ladung mittels eines Heissschrumpfschlauches 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
Authority
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
Other languages
English (en)
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
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 Newtec International SA filed Critical Newtec International SA
Publication of EP0678452A1 publication Critical patent/EP0678452A1/de
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)
EP95400868A 1994-04-22 1995-04-19 Vorrichtung und Verfahren zum Verpacken einer palettisierten Ladung mittels eines Heissschrumpfschlauches Ceased EP0678452A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9404862 1994-04-22
FR9404862A FR2719019B1 (fr) 1994-04-22 1994-04-22 Procédé d'emballage d'une charge à l'aide d'une gaine thermorétractable et machine d'emballage mettant en Óoeuvre un tel procédé.

Publications (1)

Publication Number Publication Date
EP0678452A1 true EP0678452A1 (de) 1995-10-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400868A Ceased EP0678452A1 (de) 1994-04-22 1995-04-19 Vorrichtung und Verfahren zum Verpacken einer palettisierten Ladung mittels eines Heissschrumpfschlauches

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Country Link
EP (1) EP0678452A1 (de)
FR (1) FR2719019B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792609A1 (fr) * 1999-04-26 2000-10-27 Thimon Dispositif de manutention pour la pose d'une gaine plastique thermoretractable sur une charge palettisee
DE102006058025A1 (de) * 2006-12-07 2008-06-19 Krones Ag Vorrichtung zum Erzeugen von Prozesswärme für eine Verpackungseinrichtung
CN104787397A (zh) * 2014-01-16 2015-07-22 珠海格力电器股份有限公司 冷水机组包装袋的热缩方法
CN110641788A (zh) * 2019-09-03 2020-01-03 稳健医疗(嘉鱼)有限公司 一种压缩巾的自动包装系统
CN110834771A (zh) * 2019-11-22 2020-02-25 安徽永锋智能包装科技有限公司 冰箱透明包装套袋收底方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (de) * 1987-03-26 1988-09-28 VFI Gesellschaft für Verpackungstechnik mbH Verfahren und Vorrichtung zum Aufschrumpfen einer auf einem palettierten Gutstapel befindlichen Folienhaube
FR2644136A1 (fr) * 1989-03-08 1990-09-14 Balgros Jacques Dispositif de retraction a air chaud

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (de) * 1987-03-26 1988-09-28 VFI Gesellschaft für Verpackungstechnik mbH Verfahren und Vorrichtung zum Aufschrumpfen einer auf einem palettierten Gutstapel befindlichen Folienhaube
FR2644136A1 (fr) * 1989-03-08 1990-09-14 Balgros Jacques Dispositif de retraction a air chaud

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792609A1 (fr) * 1999-04-26 2000-10-27 Thimon Dispositif de manutention pour la pose d'une gaine plastique thermoretractable sur une charge palettisee
EP1048571A1 (de) * 1999-04-26 2000-11-02 Société Thimon Vorrichtung zum umhüllen einer palettisierten Ladung mittels eines Heissschrumpfschlauches
DE102006058025A1 (de) * 2006-12-07 2008-06-19 Krones Ag Vorrichtung zum Erzeugen von Prozesswärme für eine Verpackungseinrichtung
US8807130B2 (en) 2006-12-07 2014-08-19 Krones Ag Apparatus for generating process heat for a packaging arrangement
CN104787397A (zh) * 2014-01-16 2015-07-22 珠海格力电器股份有限公司 冷水机组包装袋的热缩方法
CN110641788A (zh) * 2019-09-03 2020-01-03 稳健医疗(嘉鱼)有限公司 一种压缩巾的自动包装系统
CN110834771A (zh) * 2019-11-22 2020-02-25 安徽永锋智能包装科技有限公司 冰箱透明包装套袋收底方法

Also Published As

Publication number Publication date
FR2719019B1 (fr) 1996-05-31
FR2719019A1 (fr) 1995-10-27

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