EP0249534A1 - Verfahren und Vorrichtung zum Verpacken einer Palettenladung in eine Hülle aus wärmeschrumpffähiger Kunststoffolie - Google Patents

Verfahren und Vorrichtung zum Verpacken einer Palettenladung in eine Hülle aus wärmeschrumpffähiger Kunststoffolie Download PDF

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Publication number
EP0249534A1
EP0249534A1 EP87401242A EP87401242A EP0249534A1 EP 0249534 A1 EP0249534 A1 EP 0249534A1 EP 87401242 A EP87401242 A EP 87401242A EP 87401242 A EP87401242 A EP 87401242A EP 0249534 A1 EP0249534 A1 EP 0249534A1
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EP
European Patent Office
Prior art keywords
cover
air
palletized load
load
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.)
Granted
Application number
EP87401242A
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English (en)
French (fr)
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EP0249534B1 (de
EP0249534B2 (de
Inventor
Eric Lehmann
Jean Doberva
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
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Application filed by Newtec International SA filed Critical Newtec International SA
Publication of EP0249534A1 publication Critical patent/EP0249534A1/de
Publication of EP0249534B1 publication Critical patent/EP0249534B1/de
Application granted granted Critical
Publication of EP0249534B2 publication Critical patent/EP0249534B2/de
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B53/00Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02Shrinking wrappers, containers, or container covers during or after packaging by heat

Definitions

  • the invention relates to a method and an installation for packaging a palletized load in a heat-shrinkable plastic cover.
  • the palletized load is placed on a table (first phase), then the open cover is put on to place it around and on the palletized load (second phase) and, finally, it is heated the cover thus placed on the palletized load in order to carry out its heat-shrinking (third phase).
  • the palletized load remains stationary both horizontally and vertically, the installation being a single station and a movable support table only horizontally for the supply and evacuation of the load .
  • the installation comprises a horizontal frame, the opening of which corresponds to the size of the palletized load, slidably mounted in the vertical direction and driven to slide by drive means such as motorized endless chains.
  • the frame may include, integrated, heating means making it possible to heat shrink the cover when the frame is mounted.
  • Pressurized air supply means can be associated with the frame to produce an air mattress between the frame and the cover.
  • a second embodiment we performs the packaging in the same general three-phase sequence (placing the load on the table, placing the cover, heating). However, during the phase of fitting the cover, the palletized load is moved vertically and, between this second phase and the third heating phase, the palletized load is moved horizontally, the installation being at two stations corresponding respectively, the first, in the second phase and, the second, in the third phase.
  • the installation also comprises, at the first station, a lifting table. Air suction means are placed, at the first station, under the lifting table and have the sole function of participating in the positioning of the cover on the palletized load during the second phase of positioning.
  • a cover is used whose height is greater than that of the palletized load so that the lower free end part of the cover initially falls and protrudes under the pallet is later folded horizontally on its lower horizontal face.
  • the installation comprises, at the first station, folding means such as pivoting arms and, at the second station, separate retaining means.
  • folding means such as pivoting arms and, at the second station, separate retaining means.
  • the lifting table is openwork and the pallet allows the passage of air.
  • the packaging is carried out according to the same general sequences with three phases (process) and two stations (installations).
  • the cover as in the second embodiment, initially protrudes under the pallet.
  • a lifting table is provided at the second heating station.
  • the second heating station mainly comprises a fixed heating enclosure and means for circulating hot air in the enclosure and around the palletized load. The air causes the cover to be applied under the pallet and simultaneously heat shrink it.
  • the packaging is produced by completely separating the operations for fitting the cover and heating for the retraction.
  • the heating is carried out by means of a frame provided with radiant heat emitters mounted vertically sliding. Gripping means actuated by springs are associated with the support table to maintain the lower free outer part of the cover during heating.
  • the aim is to fix the cover under the load or the pallet.
  • the cover protrudes under the load or the pallet.
  • the vacuum is evacuated in the cover by means of a fan placed under the load or the pallet.
  • the pallet rests on a platform, being moved apart to allow the cover to be folded down.
  • the platform has openings for the passage of suction air.
  • the heating means consist of a heating mat.
  • a packaging process is known (document US 3429095) of a palletized load in a cover having the main characteristic of being impermeable to air but not of being heat-shrinkable.
  • the cover is placed around and on the palletized load, the lower free end part falling from the cover is subjected to the pallet, in a manner that is substantially sealed by means of a link, the vacuum is created in the cover and in particular in the load itself from a valve located in the middle of a vertical lateral face of the load, the valve is closed in a leaktight manner and, finally, the cover thus set is strapped.
  • the invention aims to solve the problem of very tight securing of the cover to the load, in the case of a process of the type three operational phases of placing on a table, placing the cover on a palletized load, heating the cover . More specifically, the invention aims to solve the problem of securing the lower free end part of the cover to the pallet. Indeed, in the second, third and fifth embodiments described, this subjugation requires the implementation of a lifting table or sufficiently high and the use of a sufficient cover height. In the second embodiment, the securing requires, in addition, the presence of folding means and retaining means.
  • the securing also requires the use of a sufficient cover height and, moreover, a complex adjustment of the flow of hot air and its speed along its path, deflection means appropriate air flow, support means capable of letting air pass.
  • this securing requires spring gripping means and has the result that the lower free end of the cover is not retracted.
  • the second and fifth embodiments necessarily imply the use of an openwork table and a pallet capable of allowing the passage of air, these conditions being essential.
  • the invention first proposes a method for packaging a palletized load in a shrinkable plastic cover which comprises a first phase, in which the palletized load is placed on a support; a second phase in which the open cover is put on to place it around and on the palletized load and a third phase in which the load thus placed on the palletized load is heated in order to carry out its heat-shrinking, process in which the air is sucked located in the cover at least during the third heating phase, characterized in that before the air suction, between the palletized load and the cover, in particular in a lateral clearance of the air suction means and these air suction means are removed after suction, so as to mainly suck the air in the lateral clearance.
  • the invention proposes an installation which comprises a support table, means for threading the cover to place it around and on the palletized load, means for heating the cover thus placed on the palletized load in order to carry out its heat shrinking and air suction means placed substantially outside, at the lateral periphery and in the vicinity of the support table.
  • the invention makes it possible to achieve very close securing of the cover to the palletized load and mainly of the lower free end edge of the cover to the pallet. It makes it possible to dispense with the use of a lifting table as a compulsory body, both for the establishment of the cover only for heating. It authorizes the use of an airtight pallet or the presence between the pallet and the load of a format made of an airtight material. It makes it possible to dispense, as a compulsory condition, with a cover protruding under the pallet. It makes it possible to dispense with additional folding and retaining means (second embodiment) or gripping means (fourth embodiment).
  • the invention is applicable, in particular, in the case of a packaging method of the type mentioned above which comprises an initial stage in which air is blown into a cover to avoid the presence of creases.
  • the invention relates to a method and an installation for packaging a load 1 carried by a pallet 2 in a heat-shrinkable plastic cover 3.
  • the method comprises in a manner known per se a first step, not shown, in which the palletized load 1,2 is placed on a support table 4; a second step, no shown, in which the cover 3 is threaded open to place it around on the palletized load 1,2; and a third step in which the cover 3 thus placed on the palletized load 1,2 is heated in order to heat shrink it, using heating means 5.
  • the palletized load 1, 2 can be placed directly on the support table 4 without the need to be removed from it.
  • the air in the cover 3 is sucked in at least during part of the third heating phase, so as to combine the effects of the heating and the air suction in order to ensure a tight cover of the cover 3 and the palletized load 1.2.
  • the load 1 has a generally parallelepiped shape comprising a lower horizontal face 6, an upper horizontal face 7 and four lateral vertical faces 8.
  • the invention applies to all palletized loads capable of being packaged in a shrink-wrapped plastic cover by using heating means. It applies more especially in the case where a format 9 also in the form of a film of heat-shrinkable plastic material is interposed between the load 1 proper, in particular its lower horizontal face 6, and the pallet 2. It also applies more particularly in the case of a load to be packed with a cover applied narrowly to the load, the latter may have an irregular shape.
  • the pallet 2 can be of any suitable type, in particular made of wood and comprising two horizontal panels respectively upper 10 and lower 11 associated by blocks forming a spacer 12 defining the thickness of the pallet 2 and the vertical lateral faces 13 of the pallet 2.
  • the panels 10, 11 can be full.
  • the cover 3 is made in particular from a sheath continuous tubular folded flat, which is then unfolded to be opened then cut and welded transversely.
  • the cover 3 comprises a roof 14 as well as vertical lateral faces 15, limited opposite the roof 14, by a free edge 16 defining the opening 17 of the cover 3.
  • the plastic material constituting the cover has a certain air impermeability.
  • the table 4 is normally placed horizontally, the free end portion 18 of the cover 3 being placed downwards and in the immediate vicinity of the table 4, in particular at the level of the lateral faces of the pallet 2 without projecting substantially below the lower plane of pallet 2 or above the upper plane of table 4.
  • the invention applies to the case of a cover 3 not specially adapted for hanging, originally under load 1, respectively under pallet 2 .
  • the cover 3 Before its heat-shrinking, the cover 3 has a certain lateral play 19 with the load 1, in particular its vertical faces 8, to allow the establishment of the cover 3 on the load 1 ( Figure 1). After heat shrinking, the cover 3 is applied to the load 1, the lateral clearance 19 having disappeared (FIG. 6).
  • the invention allows the presence of the initial lateral clearance 19 which facilitates the positioning of the cover 3 on the load, without hampering its retraction and especially its securing.
  • the air mainly between the palletized load 1, 2 and the cover 3 is sucked in, namely in the lateral clearance 19.
  • the air suction place between the palletized load 1,2 and the cover 3 - that is to say in the lateral clearance 19 - of the air suction means 20.
  • the air suction means 20 are removed after suction.
  • the method comprises a preliminary phase, not shown, during which the pallet 2 is placed, in particular its upper horizontal panel 10, and between the pallet 2 and the load 1, in particular its lower horizontal face 6, a format 9 whose outer edges 21 fall onto the lateral faces 13 of the pallet 2 (FIG. 1).
  • the material constituting the format is generally the same as that constituting the cover 3.
  • the dimensions of the format 9, relative to those of the pallet 2, are such that the outer edges 21 are at the same maximum as that of the table 4 and, preferably, slightly above it.
  • the dimensions of the cover 3 relative to those of the palletized load 1,2, in particular the height, are such that the free edges 16 of the cover 3 are located at the maximum at the same level as that of the table 4 and preferably at- above it, facing the outer edges 21 ( Figure 1).
  • the lower free end portion 18 of the cover 3 is applied to the falling outer edges 21 of the format 9.
  • the lower free end portion 18 and / or the falling edges 21 are heat-shrunk and secured together, while remaining in line with the lateral faces of the pallet 1, in particular without passing beneath it after shrinking.
  • the cover 3 is heated by successive zones, in particular in the form of horizontal rings from bottom to top, that is to say from the opening 17 to the roof 14.
  • This heating by successive zones is carried out when the lower free end portion 18 and the drooping edges 21 are secured, so as to avoid a rise in the free edge 16 of the cover and, thus, ensure, by heat shrinking the cover 3, vertical cohesion forces on the palletized load 1.2.
  • the palletized load 1,2 is permanently supported vertically stationary. According to another possible variant, the palletized load is raised vertically during the third heating phase. This last variant is more specifically applicable when the outer edges 21 of the format 9 and the free end 18 of the cover 3 protrude under the table 4, in particular its lower wall 11. According to a possible variant of the invention, the palletized load 1,2 is permanently supported horizontally, either stationary or non-stationary under palletized load 1, 2 which can be moved horizontally. In the first case, (stationary horizontal hold) the process applies to a single station machine. The second case applies more specifically to a machine with two separate stations (installation of the sheath and heating).
  • the air suction means 20 are put in place between the second phase (fitting the sheath) and the third phase (heating).
  • air aspiration is started at the latest at the start of the third heating phase and in particular at the start, or shortly before the start, of the third phase.
  • the air intake is terminated at the latest at the end of the third heating phase and, in particular, at the end or shortly before the end of the third phase.
  • the air is drawn in continuously.
  • the air is sucked discontinuously, in particular during a first initial step with a view to ensuring the application of the extreme free part 18 of the cover 3 on the pallet 2, respectively on the edges outside 21 of format 9 and, in one or more subsequent steps, in order to avoid the formation of pockets of expansion air between the palletized load 1,2 and the cover 3 (as a result of the expansion of the tune 19).
  • the air is drawn in constantly.
  • the air is sucked in a variable manner, in particular in a decreasing manner as the heating phase progresses, and this as a function of the residual volume of air being in the set 19 .
  • the cover 3 - in particular its part - is moved transversely (that is to say horizontally and perpendicular to a vertical face 8) extreme liber 18 - of the palletized load 1,2 to make between them a passage 22 open to the outside and one makes penetrate from the outside, then slide longitudinally - in particular vertically and ascendingly - in the passage 22 the means d air intake 20 and more particularly a suction nozzle 23.
  • the passage 22 therefore results from a transverse widening of the clearance 11, the opening of which is the opening 17.
  • the air suction means 20 are placed at least substantially on a vertical median line of a lateral face 8.
  • the suction means 20 can be placed on several contiguous faces 8 and / or opposite and in particular on the four lateral faces 8.
  • the air suction means 20 are placed, in any event, so as to produce effective suction throughout the set 19.
  • the air suction means 20, in particular the nozzle 23, are fixed during the suction.
  • the air suction means 20, in particular the nozzle 23, are movable during the suction, for example with vertical sliding so as to be placed in or near the zone in which the air intake is desired, this area generally being close to the heating area.
  • the air suction means 20 are removed immediately, or almost immediately, after the end of the suction.
  • the air suction means 20 are removed by longitudinal sliding of the nozzle. 23 in the passage 22.
  • the cover 3 is heated laterally in the area of the suction means 20 (FIG. 6).
  • the invention also relates to an installation for implementing the method which comprises a support table 4 for the palletized load 1,2; means for threading the cover 3 open to place it around and on the palletized load 1,2, not shown; heating means 5 of the cover thus placed on the palletized load 1,2 in order to heat shrink it; and air suction means 20 which are placed substantially outside, at the lateral periphery and in the vicinity of the support table 4 (FIG. 3).
  • the air suction means 20 are located in the vicinity of the heating means 5, that is to say at the station of the installation comprising the heating means 5 so that the heating means 5 and the means d suction 20 can operate at least partially and simultaneously and thus combine their effects.
  • the suction means 20 comprise for example motor means 24 having a generally fixed position, in particular laterally next to the support table 4 and nozzle means 23 mounted in a movable manner, in particular essentially by longitudinal sliding between, on the one hand , an active working position ( Figures 3, 4 and 5) where they are placed outside, at the lateral periphery, slightly above and near the support table 4 and in particular between the palletized load 1,2 and the cover 3, so as to allow the suction of air are between them and, on the other hand, an inactive rest position (FIGS. 1, 2, and 6) where they are moved away from the active working position, including the support table 4.
  • an active working position Figures 3, 4 and 5
  • FIGS. 1, 2, and 6 inactive rest position
  • the heating means 5 are, for example, constituted by a horizontal frame, the opening of which corresponds to the size of the palletized load 1,2, mounted sliding in the direction vertical and slidingly driven by drive means such as motorized endless chains.
  • the means for threading the cover 3 comprise, for example, fingers for gripping the cover 3 carried by the movable horizontal frame of the heating means 5, the installation then being at a single position for fitting the cover and heating .
  • the installation may include two separate posts, the first for fitting the cover and the second for heating.
  • the installation also includes means for positioning on the pallet 2 and between it and the load 1 of format 9 (not shown). These means are located upstream of the means for threading the cover 3 onto the load 1.
  • the support table 4 is fixed in the vertical direction. It can be full, that is to say it is not specially designed to allow the passage of air through. It may be low, that is to say not be specially designed to allow the housing, beneath it, of suction means or elevation means or to allow the sheath to protrude below.
  • the installation further comprises means 25 for gripping the cover 3 - in particular by suction - movable in transverse direction, placed in the vicinity of the means of the nozzle 23 in the active working position and capable of producing between the pallet load 1,2 and the cover 3 has a passage 22 for installing and removing the air suction means 20.
  • the installation finally comprises localized heating means 26 of the cover 3 placed in the vicinity of the nozzle means 23 in the active working position and capable of performing the heat shrinkage of the cover at the location of the nozzle means 23.
  • the nozzle means 23 preferably have a shape general elongated and flattened.
  • the installation may include nozzle means 23 on at least two contiguous and / or adjacent sides of the support table 4.
  • the invention relates to a packaging for a palletized load 1,2 comprising a cover 3 made of heat-shrinkable plastic placed around and on the palletized load 1,2 which is obtained by the method described above.
  • This packaging may comprise, between the pallet 2 and the load 1, a format 9 also made of heat-shrinkable plastic, the outer edges 21 of which are rigidly and sealingly associated with the lower free end portion 18 of the cover 3, by heat-sealing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pallets (AREA)
  • Packaging Of Machine Parts And Wound Products (AREA)
EP19870401242 1986-06-04 1987-06-03 Verfahren und Vorrichtung zum Verpacken einer Palettenladung in eine Hülle aus wärmeschrumpffähiger Kunststoffolie Expired - Lifetime EP0249534B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8608058 1986-06-04
FR8608058A FR2599710B1 (fr) 1986-06-04 1986-06-04 Procede et installation pour l'emballage d'une charge palettisee dans une housse en matiere plastique thermoretractable

Publications (3)

Publication Number Publication Date
EP0249534A1 true EP0249534A1 (de) 1987-12-16
EP0249534B1 EP0249534B1 (de) 1990-08-16
EP0249534B2 EP0249534B2 (de) 1997-05-14

Family

ID=9335996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870401242 Expired - Lifetime EP0249534B2 (de) 1986-06-04 1987-06-03 Verfahren und Vorrichtung zum Verpacken einer Palettenladung in eine Hülle aus wärmeschrumpffähiger Kunststoffolie

Country Status (4)

Country Link
EP (1) EP0249534B2 (de)
DE (1) DE3764319D1 (de)
ES (1) ES2018034T5 (de)
FR (1) FR2599710B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042235A (en) * 1988-12-24 1991-08-27 Msk-Verpackungs-Systeme Gesellschaft Mit Beschrankter Haftung System for shrink-wrapping palletized goods
US5502947A (en) * 1993-10-26 1996-04-02 Maschinenfabrik Mollers Gmbh U. Co. Method of and apparatus for shrinking a shrink film cover
EP1445197A1 (de) 2003-02-10 2004-08-11 Thimon Vorrichtung und Verfahren zum Umhüllen einer palettisierten Ladung mit einer Heissschrumpffolienhaube
EP2433874A1 (de) * 2010-09-27 2012-03-28 Felix Waldner GmbH Verfahren zum Verpacken eines Packgutes und Verpackung für ein Packgut
WO2017108965A3 (de) * 2015-12-22 2017-08-17 Gebr. Heinemann SE & Co. KG Verfahren und vorrichtung zur manipulationssicheren versieglung von packgut

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1558889A (de) * 1968-02-07 1969-02-28
FR2090893A5 (de) * 1970-04-29 1972-01-14 Heraeus Gmbh W C
FR2480236A1 (fr) * 1980-04-15 1981-10-16 Joosten Paul Verpacktech Procede de retraction d'une housse et dispositif pour la mise en oeuvre du procede

Family Cites Families (1)

* 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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1558889A (de) * 1968-02-07 1969-02-28
FR2090893A5 (de) * 1970-04-29 1972-01-14 Heraeus Gmbh W C
FR2480236A1 (fr) * 1980-04-15 1981-10-16 Joosten Paul Verpacktech Procede de retraction d'une housse et dispositif pour la mise en oeuvre du procede

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042235A (en) * 1988-12-24 1991-08-27 Msk-Verpackungs-Systeme Gesellschaft Mit Beschrankter Haftung System for shrink-wrapping palletized goods
US5502947A (en) * 1993-10-26 1996-04-02 Maschinenfabrik Mollers Gmbh U. Co. Method of and apparatus for shrinking a shrink film cover
EP1445197A1 (de) 2003-02-10 2004-08-11 Thimon Vorrichtung und Verfahren zum Umhüllen einer palettisierten Ladung mit einer Heissschrumpffolienhaube
FR2850949A1 (fr) 2003-02-10 2004-08-13 Thimon Dispositif et procede d'emballage d'une charge palettisee au moyen d'une housse a film en matiere plastique thermoretractable
EP2433874A1 (de) * 2010-09-27 2012-03-28 Felix Waldner GmbH Verfahren zum Verpacken eines Packgutes und Verpackung für ein Packgut
EP2592006A1 (de) * 2010-09-27 2013-05-15 Felix Waldner GmbH Verfahren zum Verpacken eines Packgutes und Verpackung für ein Packgut
US9205964B2 (en) 2010-09-27 2015-12-08 Felix Waldner Gmbh Method for packaging a pack commodity, and package for a pack commodity
US9856062B2 (en) 2010-09-27 2018-01-02 Felix Waldner Gmbh Method for packaging a pack commodity, and package for a pack commodity
WO2017108965A3 (de) * 2015-12-22 2017-08-17 Gebr. Heinemann SE & Co. KG Verfahren und vorrichtung zur manipulationssicheren versieglung von packgut
EP3733534A3 (de) * 2015-12-22 2021-01-13 Gebr. Heinemann SE & Co. KG Verfahren zur manipulationssicheren versieglung von packgut

Also Published As

Publication number Publication date
DE3764319D1 (de) 1990-09-20
EP0249534B1 (de) 1990-08-16
ES2018034T5 (es) 1997-10-16
EP0249534B2 (de) 1997-05-14
ES2018034B3 (es) 1991-03-16
FR2599710B1 (fr) 1989-03-24
FR2599710A1 (fr) 1987-12-11

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