EP1445197B1 - Vorrichtung und Verfahren zum Umhüllen einer palettisierten Ladung mit einer Heissschrumpffolienhaube - Google Patents

Vorrichtung und Verfahren zum Umhüllen einer palettisierten Ladung mit einer Heissschrumpffolienhaube Download PDF

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Publication number
EP1445197B1
EP1445197B1 EP20040354004 EP04354004A EP1445197B1 EP 1445197 B1 EP1445197 B1 EP 1445197B1 EP 20040354004 EP20040354004 EP 20040354004 EP 04354004 A EP04354004 A EP 04354004A EP 1445197 B1 EP1445197 B1 EP 1445197B1
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EP
European Patent Office
Prior art keywords
load
heat
pallet cover
cover
pallet
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.)
Expired - Lifetime
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EP20040354004
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English (en)
French (fr)
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EP1445197A1 (de
Inventor
Jean-Paul Charles Martin Cocher
Georges Jaconelli
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Thimon SAS
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Thimon SAS
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Publication of EP1445197A1 publication Critical patent/EP1445197A1/de
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Publication of EP1445197B1 publication Critical patent/EP1445197B1/de
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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

  • Packaging processes and installations consist in making a cover from a sheath of heat-shrinkable film, for example in polyethylene, open it with the lower edge facing downwards, comb the palletised load with the cover, and heat the sides of the cover with a heating frame to heat shrink the load.
  • Heat shrinkage generally requires a particular support table-handling, with a suction device to control the conformation of the film during this step.
  • the document FR-A-2816587 describes a rigging and retraction installation, in which the lower edge of the cover is held by the stuffing fingers during the entire phase of foaming and heat sealing.
  • EP-A-376028 relates to a packaging device equipped with pivoting lever pressing elements operating outside the gripper moving area.
  • the lower edge of the cover is held by the four pivoting levers, on the one hand against stops integral with the support table, and on the other hand on the outer faces of the beams of the pallet.
  • the pivoting levers are rotatably mounted below the positioning plane, and around horizontal axes integral with the table.
  • the document EP 697337 relates to a method and a device for overpacking a palletised load, comprising a preliminary step of covering the load with a cover of heat-shrinkable film, followed by a step of thermal shrinkage of the film, implementing the retraction of a return of film under the face lower lateral sliding supports, and a conformation of the cover along the transverse sides to bring the lower edge of the cover substantially at the lower face of the floor of the pallet load.
  • the lower edge of the cover is not removed from the load by mechanical means.
  • Such a device is intended to clear the passage of the handling forks in automatic storage magazines.
  • the document DE 4426369 mentions a packaging device, wherein the film is removed from the load by air, and not by mechanical spacing means. We blow first inside to distribute the film around the load, then we suck the internal air during retraction. The film is then plated by the effect of depression against the load, which complicates the evacuation of air.
  • Other known installations propose handling tables allowing an elevation of the pallet at the end of retraction, and the suction of the film under the laying plane. Such an arrangement is not suitable for loads with glass containers, since the film tends to come off the foot of the pallet during handling. Heat sealing is not guaranteed.
  • the object of the invention is to develop a packaging method for improving the retraction and heat sealing on a sealing format of a cover Shrink wrap packaging on a palletized load requiring perfect sealing.
  • Energizing the edge of the cover allows escape of air trapped through the gap, and prevents vertical shrinkage of the lower edge during the heat shrink phase.
  • the retaining means Before the introduction of the retaining means, it is advantageous to blow air inside the cover to move the lower edge of the load in the introduction zone.
  • the retaining means is first introduced vertically from a lower level outside the cover to a higher level inside the cover, and then said retaining means are horizontally spread towards the four corners of the lower edge for keep the cover open.
  • the upper level retaining means is vertically disengaged towards the lower level outside the cover when the lower edge is heat-sealed to the floor mat.
  • a gas injection step can also be provided after the suction phase.
  • An injected gas is preferably used inside the space between the cover and the load, so as to sanitize or treat the internal volume of the cover.
  • the final sealing of the cover by heat sealing takes place immediately after this gas injection, so as to prevent any escape of gas or introduction of air.
  • the invention also relates to a packaging installation of a palletized load by means of a heat-shrinkable plastic cover, comprising a palletized load support table, covering means for threading the cover open around and on the load, retracting frame heating means for heating the heat-shrinkable plastic cover for heat-shrinking on the load, retaining means in place under the lower edge of the cover to create an air exhaust gap and arranged to prevent vertical shrinkage of the cover during heat shrinkage, and an air suction and blowing device disposed in the support table and under the pallet, characterized in that the retaining means includes a take-back mechanism with four movable control fingers intended to move apart to stretch the cover downwards by holding it by the four angles, and at a predefined distance complete load throughout the shrinking phase.
  • control fingers are movable horizontally and vertically, being arranged in two casings integral with the two opposite sides of the support table.
  • Each housing encloses a pair of control fingers cooperating with drive means to occupy a close position or a remote position.
  • An air suction and blowing device is arranged in the support table and under the pallet.
  • control fingers can be drilled and connected to a gas injection device to ensure sanitization or other treatment inside the cover.
  • a load CH consisting of a stack of bottles 10 made of glass or plastic is placed on a rectangular pallet 12 with the interposition of a floor mat 14 projecting beyond the edges of the container. the pallet 12.
  • the pallet assembly 12 and CH load is fed to a support table 13 by means of a conveyor or a chain conveyor 16, which moves in a longitudinal direction perpendicular to the plane of FIGS. 1 and 2.
  • the upper face 15 of the pallet 12 covered by the floor mat 14 is wider than the distance between the two external beams or studs extending parallel to the longitudinal direction.
  • the beams 17 form spacers defining the thickness of the pallet 12.
  • the load CH has a parallelepipedal shape comprising a lower horizontal face 19 bearing on the floor mat 14, an upper horizontal face 27, and four lateral vertical faces 28 .
  • a cover 18 is made from a tubular sheath of heat-shrinkable plastic film, especially polyethylene, said sheath being cut before and then welded transversely to form a roof. The cover 18 is then opened by its lower end pointing downwards, and then is threaded on the palletized CH load during a first shading step. The upper face 27 of the load CH is thus completely capped by the cover 18.
  • the device for shaping the cover 18 and covering the load CH is described in detail in the document EP 1060988 .
  • the floor mat 14 is formed by a format made from a heat-shrinkable plastic film, whose outer edges fall on the lateral faces of the pallet 12.
  • the material constituting the floor mat 14 may be the same as that of the cover 18. In the position of covering, the lower edge 29 of the cover 18 is arranged around the falling edges of the floor mat 14.
  • a fan 21 is disposed under the pallet 12 inside the support table 13, and is driven by a motor 22 electric reversal direction of rotation to form a device for suction or air blowing inside. of the cover 18.
  • a heater constituted for example by a retraction frame 20, is arranged with clearance around the load CH coated with its cover 18.
  • the retraction frame 20 is movable vertically (arrow F1) by drive means (not shown) for heating the side surface of the cover 18 from top to bottom during the retraction phase of the film on the load CH.
  • the installation may comprise either a single station for combining the shading and retraction phases, or two separate separate stations, the first upstream for the implementation of the cover 18, and the second downstream for heating.
  • Retaining means located under the upper face 15 of the pallet 12, are made active during the retraction phase to move the open bottom edge 29 of the cover 18 relative to the load CH and the pallet 18 leaving an interval 24 ( Figure 2).
  • the air trapped inside the cover 18 can thus escape naturally through this gap 24 during the retraction phase as the heating frame descends.
  • the natural peripheral escape of the air can be completed by an additional flow generated by a suction effect when the fan 21 is put into operation. This energization at the four angles prevents any vertical withdrawal of the lower edge during at least part of the heat shrink phase.
  • the retaining means comprise a recovery mechanism 23 intended to ensure the shaping and holding of the lower edge 29 of the cover 18 during the entire retraction phase.
  • the recovery mechanism 23 is equipped for this purpose with four movable control fingers 26 horizontally and vertically, so as to reposition and moderately tension the cover 18 by holding the lower edge 29 by the four corners, and at a predetermined distance from the faces of the load CH and the pallet 12.
  • the recovery mechanism 23 is disposed in two housings 30 integral with the two opposite sides of the support table 13. Each housing 30 contains a pair of control fingers 26 may occupy a close position (half view left, FIGS. 3 and 4), or a separated position (half-view on the right, FIGS. 3 and 4).
  • the control fingers 26 of each pair are initially in a close position (see half-view on the left, FIG. lower level located below the pallet 12.
  • the heating frame 20 is placed in the upper position, at the upper part of the load CH, but is not yet activated to ensure the retraction.
  • the fan 21 can be actuated to cause an air blast to move the lower edge 29 of the pallet 12 into the insertion zone 31 of the control fingers 26.
  • control fingers 26 are then moved vertically towards the upper level (half-view on the right, FIG. 1), so as to insert them into the zone 31 between the pallet 12 and the lower edge 29 of the cover 18. in place, the control fingers 26 remain in close position.
  • Drive means 32 of the take-up mechanism 23 subsequently move the control fingers 26 horizontally towards the separated position (half-view on the right, FIGS. 2 and 3 and 4) while keeping the lower edge 29 of the cover at the four positions. angles with formation of the gap 24 open to the outside. A blowing of air can then cause a slight inflation of the cover 18 to avoid possible wrinkling during the next phase of retraction.
  • the drive means 32 of the fingers 26 of the recovery mechanism 23 comprise, by way of example, a belt transmission device 33 actuated by a geared motor 34, and driving each finger support 26 along an inclined or curvilinear ramp.
  • the end positions of each ramp 35 correspond to the positions close to and apart from the fingers 26.
  • the retraction frame 20 heats the lateral faces of the cover 18 following a movement from top to bottom (arrow F1, Figure 2).
  • the air trapped between the load CH and the cover 18 is sucked by the fan 21 rotating in the opposite direction, and is driven out through the gap 24.
  • the suction air is carried out throughout the downward movement of the retraction frame 20, so as to completely empty the cover 18.
  • Positioning the heating frame 20 in the low position causes heating of the lower edge 29 of the cover.
  • the control fingers 26 are disengaged towards the lower level. This results in a heat sealing effect of the lower edge 29 on the floor mat 14 making the cover 18 completely watertight.
  • the suction made by the fan 21 during this step promotes this heat sealing, and limits the vertical shrinkage of the cover.
  • the pierced control fingers 26 may be connected to a gas injection device (not shown) to ensure sanitization or other treatment inside the cover 18. During this step of injection of gas, the suction by the fan 21 is maintained, so as to press the cover against the floor mat 14, and seal the gap 24 between the load CH and the edge of the cover 18.
  • each of the two lateral recovery mechanisms 123 is equipped with a pair of levers 36 for actuating fingers 26.
  • Each lever 36 is pivotally mounted on an axis 37 between two angular positions. , one of which allows the cover 18 to be held in the position removed (see position C in Figure 6).
  • Each lever 36 is associated with a tension spring 38 urging the fingers 26 in a close position (see position A in FIG. 5).
  • a actuating jack 39 actuates each lever 36 to move it horizontally to an angle of the load CH when the fingers 26 are moved away. From the close position A of FIG. 5, the fingers 26 are first displaced by translation to the intermediate position B of Figure 6 without departing from the load CH. In this intermediate position, the springs 38 of the levers 36 remain relaxed as in FIG. 5. The continued travel of the jacks 39 then causes opposing tilting movements of the levers 36 towards the position spaced from the fingers 26 (see position C, FIG. 6) . The traction springs 38 are then stretched, and automatically return to the close position at the end of the retraction phase during the return of the jacks 39. The fingers 26 are then disengaged downwards by a vertical movement of the recovery mechanism 123 or by a pivoting about the axis 39 controlled by a pneumatic jack 40.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Packages (AREA)

Claims (14)

  1. Verfahren zum Verpacken eines palettierten Gutstapels (CH) mit einer Haube aus wärmeschrumpfbarem Kunststoff, das umfasst:
    - Anordnung des Gutstapels (CH) auf einem Auflagetisch (13), wobei eine Bodenplane (14) dazwischengelegt wird, die die Oberseite (15) der Palette (12) bedeckt,
    - eine Erwärmung der vorab auf dem Gutstapel (CH) angeordneten Haube (18), um deren Anschrumpfen an die Seiten des Gutstapels (CH) sicherzustellen,
    - Abzug der zwischen der Haube (18) und dem Gutstapel (CH) eingeschlossenen Luft, und zwar durch deren Herauspressen durch einen seitlichen Austrittsspalt (24), der durch Rückhaltemittel hergestellt wird, die unter dem unteren Rand (29) der Haube angeordnet werden und ein vertikales Schrumpfen der Haube während des Wärmeschrumpfens verhindern sollen,
    - und in einem Entfernen der Rückhaltemittel, um den unteren Rand (29) der Haube (18) an die herabhängenden Ränder der Bodenplane (14) zu schrumpfen und so die Verpackung dicht zu machen,
    dadurch gekennzeichnet, dass
    - nach dem Umhüllen des Gutstapels (CH) Anordnung von Rückhaltemitteln unter dem unteren Rand (29), um die Haube (18) leicht von unten her zu spannen, indem der untere Rand (29) an den vier Ecken und in einem vorbestimmten Abstand um den Gutstapel (CH) von diesem entfernt gehalten wird, damit während des gesamten Wärmeschrumpfungsvorgangs der Spalt (24) am Umfang offen erhalten bleibt,
    - und Absaugung der eingeschlossenen Luft durch diesen seitlichen Abzugsspalt (24), damit während des Wärmeschrumpfens die Haube (18) komplett entleert wird.
  2. Verpackungsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass vor dem Anbringen der Rückhaltemittel in das Innere der Haube (18) vorteilhafterweise Luft eingeblasen wird, um im Einführungsbereich (31) den unteren Rand (29) vom Gutstapel (CH) entfernt zu halten.
  3. Verpackungsverfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zunächst die Rückhaltemittel vertikal von einer unteren Ebene außerhalb der Haube (18) zu einer oberen Ebene innerhalb der Haube eingeführt und diese Rückhaltemittel dann horizontal zu den vier Ecken des unteren Rands (29) hin entfernt werden, um die Haube (18) offen zu halten.
  4. Verpackungsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass nach dem Absaugen der Luft ein Gas eingeblasen wird, um den Innenraum der Haube keimfrei zu machen oder zu behandeln.
  5. Verpackungsverfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Rückhaltemittel während des Heißsiegelns des unteren Rands (29) an die Bodenplane (14) von der oberen Ebene zur unteren Ebene außerhalb der Haube weggezogen werden.
  6. Vorrichtung zum Verpacken eines palettierten Gutstapels (CH) mit einer Haube (18) aus wärmeschrumpfbarem Kunststoff, die umfasst:
    - einen Auflagetisch (13) für den palettierten Gutstapel (CH),
    - Umhüllungsmittel zum Ziehen der offenen Haube (18) um und auf den Gutstapel (CH),
    - Mittel zum Erwärmen mit einem Schrumpfrahmen (20) zum Erwärmen der Haube (18) im Hinblick auf deren Aufschrumpfen auf den Gutstapel (CH),
    - Rückhaltemittel, die unter dem unteren Rand (29) der Haube angeordnet werden, um einen Spalt herzustellen, durch den die Luft entweichen kann, und die so vorgesehen sind, dass sie ein vertikales Schrumpfen der Haube während des Wärmeschrumpfens verhindern,
    - und eine Vorrichtung zum Ansaugen und Einblasen von Luft, die in dem Auflagetisch (13) und unter der Palette (12) angeordnet ist,
    dadurch gekennzeichnet, dass die Rückhaltemittel einen Aufnahmemechanismus (23, 123) mit vier beweglichen Steuerfingern (26) umfassen, die voneinander entfernt werden sollen, um die Haube (18) nach unten zu spannen, wobei sie diese während des gesamten Wärmeschrumpfungsvorgangs an den vier Ecken und in einem vorbestimmten Abstand von dem Gutstapel (CH) entfernt halten.
  7. Verpackungsvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Steuerfinger (26) horizontal und vertikal beweglich und in zwei Gehäusen (30) angeordnet, die fest mit den beiden entgegengesetzten Seiten des Auflagetisches (13) verbunden sind.
  8. Verpackungsvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass jedes Gehäuse (30) ein Paar Steuerfinger (26) beherbergt, die mit Antriebsmitteln (32) zusammenwirken, um eine angenäherte oder abgespreizte Position einzunehmen.
  9. Verpackungsvorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Antriebsmittel (32) des Aufnahmemechanismus (23) eine von einem Getriebemotor (34) gesteuerte Übersetzungsvorrichtung (33) zum Bewegen jedes Fingers (26) entweder entlang einer schrägen oder gebogenen Schiene (35) oder mittels Gelenkarmen umfassen, deren Endpositionen jeweils der angenäherten bzw. der entfernten Position der Finger (26) entsprechen.
  10. Verpackungsvorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Antriebsmittel (32) des Aufnahmemechanismus (123) einen Steuerungszylinder (39) umfassen, der mit einem Schwenkhebel (36) zusammenwirkt, um jeden Finger (26) zwischen der angenäherten und entfernten Position zu bewegen.
  11. Verpackungsvorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass eine Rückholfeder (38) mit jedem Hebel (36) verbunden ist, um ihn aus der entfernten in die angenäherte Position zurückzuführen.
  12. Verpackungsvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Ansaug- und Einblasvorrichtung von einem Ventilator (21) gebildet wird, der mit einem Elektromotor (22) mit umkehrbarer Drehrichtung verbunden ist.
  13. Verpackungsvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Steuerfinger (26) hohl sind und Ansaugöffnungen umfassen, die ein Gleiten der Folie auf die Finger während des Schrumpfungsvorgangs verhindern sollen.
  14. Verpackungsvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Steuerfinger (26) hohl und mit einer Vorrichtung zum Einblasen von Gas verbunden sind, wodurch eine Entkeimung oder eine beliebige andere Behandlung innerhalb der Haube (18) durchgeführt werden kann, wobei das Einblasen von Gas kurz vor dem Heißsiegeln erfolgt.
EP20040354004 2003-02-10 2004-02-02 Vorrichtung und Verfahren zum Umhüllen einer palettisierten Ladung mit einer Heissschrumpffolienhaube Expired - Lifetime EP1445197B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0301532A FR2850949B1 (fr) 2003-02-10 2003-02-10 Dispositif et procede d'emballage d'une charge palettisee au moyen d'une housse a film en matiere plastique thermoretractable
FR0301532 2003-02-10

Publications (2)

Publication Number Publication Date
EP1445197A1 EP1445197A1 (de) 2004-08-11
EP1445197B1 true EP1445197B1 (de) 2007-06-20

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EP20040354004 Expired - Lifetime EP1445197B1 (de) 2003-02-10 2004-02-02 Vorrichtung und Verfahren zum Umhüllen einer palettisierten Ladung mit einer Heissschrumpffolienhaube

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EP (1) EP1445197B1 (de)
DE (1) DE602004007049T2 (de)
DK (1) DK1445197T3 (de)
ES (1) ES2289462T3 (de)
FR (1) FR2850949B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2433874T3 (pl) 2010-09-27 2013-08-30 Felix Waldner Gmbh Sposób opakowywania produktu pakowanego i opakowanie dla produktu pakowanego
DE102015122597A1 (de) * 2015-12-22 2017-06-22 Gebr. Heinemann SE & Co. KG Verfahren und Vorrichtung zur manipulationssicheren Versieglung von Packgut
RU197563U1 (ru) * 2020-01-31 2020-05-13 Закрытое акционерное общество "Стеклопак" Механизм сварки пленочной оболочки для упаковки штабеля предметов на поддоне

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3521416A1 (de) * 1985-06-14 1986-12-18 MSK - Verpackungs-Systeme GmbH, 4190 Kleve Verfahren zum verpacken eines auf einer palette angeordneten gutstapels und vorrichtung zur durchfuehrung des verfahrens
FR2599710B1 (fr) 1986-06-04 1989-03-24 Newtec Int Procede et installation pour l'emballage d'une charge palettisee dans une housse en matiere plastique thermoretractable
DE8816085U1 (de) 1988-12-24 1989-03-09 MSK-Verpackungs-Systeme GmbH, 4190 Kleve Vorrichtung zum Verpacken eines auf einer Palette angeordneten Gutstapels
DE4426369C1 (de) * 1994-07-26 1995-08-17 Moellers Maschf Gmbh Verfahren zum Verpacken eines Gutstapels mit einer Schrumpffolienhaube
FR2723564B1 (fr) * 1994-08-12 1996-09-20 Newtec Int Procede et dispositif de suremballage, par thermo-retraction, d'une charge palettisee
FR2816587B1 (fr) 2000-11-16 2003-03-07 Thimon Procede et dispositif de houssage et de thermoscellage d'une housse en matiere plastique thermoretractable pour constituer un emballage etanche sur une charge palettisee

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ES2289462T3 (es) 2008-02-01
DE602004007049D1 (de) 2007-08-02
FR2850949B1 (fr) 2005-10-21
DK1445197T3 (da) 2007-10-22
DE602004007049T2 (de) 2008-02-28
EP1445197A1 (de) 2004-08-11
FR2850949A1 (fr) 2004-08-13

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