EP0656853B1 - Procede de suremballage de charges a l'aide d'un film etirable, machine et film pour sa mise en oeuvre - Google Patents

Procede de suremballage de charges a l'aide d'un film etirable, machine et film pour sa mise en oeuvre Download PDF

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Publication number
EP0656853B1
EP0656853B1 EP93919400A EP93919400A EP0656853B1 EP 0656853 B1 EP0656853 B1 EP 0656853B1 EP 93919400 A EP93919400 A EP 93919400A EP 93919400 A EP93919400 A EP 93919400A EP 0656853 B1 EP0656853 B1 EP 0656853B1
Authority
EP
European Patent Office
Prior art keywords
film
machine
stretched
roll
fact
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
Application number
EP93919400A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0656853A1 (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 EP0656853A1 publication Critical patent/EP0656853A1/fr
Application granted granted Critical
Publication of EP0656853B1 publication Critical patent/EP0656853B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/04—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated
    • B65B11/045—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated by rotating platforms supporting the articles
    • 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
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/02—Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders
    • B65B11/025—Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders by webs revolving around stationary articles
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B2011/002—Prestretching mechanism in wrapping machines
    • 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
    • B65B2210/00—Specific aspects of the packaging machine
    • B65B2210/14—Details of wrapping machines with web dispensers for application of a continuous web in layers onto the articles
    • B65B2210/18—Details of wrapping machines with web dispensers for application of a continuous web in layers onto the articles the web dispenser being mounted on a rotary ring
    • 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
    • B65B2210/00—Specific aspects of the packaging machine
    • B65B2210/14—Details of wrapping machines with web dispensers for application of a continuous web in layers onto the articles
    • B65B2210/20—Details of wrapping machines with web dispensers for application of a continuous web in layers onto the articles the web dispenser being mounted on a rotary arm

Definitions

  • the invention relates to a process for overpacking fillers in stretch film, a machine and a film for its implementation. It relates more particularly to the overpacking of palletized loads, without however being limited to such an application insofar as it can be used for the overpacking of loads grouped together without a pallet.
  • the overwrapping in stretch film of palletized or non-palletized fillers can be carried out from a film, generally of polyethylene, of a thickness between 12 and 150 microns, -and more generally between 20 and 30 microns-, unwound from a reel and by implementing two main types of techniques which can be distinguished under the names of "wrapping" and "laying by curtain".
  • a film with a width of the order of 500 mm wound on a cardboard hub is placed around the load, palletized or not, taking advantage of the relative displacement by with respect to said load from a mobile assembly which carries the coil, the load itself being either fixed or mobile.
  • a generally larger width film is placed across a path taken by the load, forming a "curtain” which is first entrained by said load, then is closed on it.
  • the film is stretched there in situ, simultaneously or almost simultaneously with its positioning, that is to say either by causing the tension of the film between the load and a brake placed on the support of the film reel, or by circulating the film between rollers driven by motors at different circumferential rotational speeds, as explained in FR-2 281 275, cited above.
  • the elongation of the film is limited to a value of the order of 80 to 100% while the elongation can reach 200%, or even more, in installations according to the second embodiment. provided that the palletized loads or not are of an appropriate shape, well centered on the machine, and that the film stretching device is particularly efficient.
  • the stretching devices currently used on motor-driven roller machines require relatively complex mechanisms to obtain satisfactory results which increase the weight of the moving parts of the overwrapping machines so that, to avoid the rotation of excessively large masses, these are film reels of limited weight which are used with the consequence of a relatively narrow operating autonomy by the need to frequently change the reels of unstretched film used.
  • the reeling speeds of the film can be varied by an order of magnitude in short spaces of time, for example from 10 to 200 m.
  • FR-A-2 579 577 which mentions the difficulties encountered in carrying out a total pre-stretching of the films which can be of the order of 300% -, recommends carrying out, on the overwrapping machine, a pre-stretching in two phases separated by an extremely short rest moment (of the order of a few hundredths of a second). If such a solution is advantageous, in that it makes it possible to execute significant pre-stretching ratios, it is complex to implement, on the one hand, and does not bring, on the other hand, simplification machines for its implementation, quite the contrary.
  • DE-34 09 117 which relates to a method of overpacking loads using a stretch film placed after it has been pre-stretched and in which the film is unwound from a reel or the like on which it is stored in the pre-stretched state, also does not provide a real solution to the drawbacks mentioned since it offers an elongation limited to about 50%.
  • the preambles of claims 1 and 2 are based on this state of the art.
  • an object of the invention to provide such a method, machine and film for its implementation, the use of which not only meets the requirements of the regulations in force regarding labor law but also allow, for machine operators, improved working and safety conditions.
  • a method according to the invention of overpacking of loads grouped into a burden, palletized or not, using a stretch film placed around the burden and, if necessary, a pallet, after it has been pre-stretched and unwound from a reel or the like on which it is stored in the pre-stretched state is characterized in that said film is pre-stretched to have an elongation of the order of 150 to 500 % and so that it has, after relaxation, a tension in the reel of between 2 and 7, preferably between 2 and 3, DAN / mm 2 of film section per turn.
  • the invention also relates to a machine for overpacking loads grouped into a burden, palletized or not, using a stretch film placed around said burden comprising means for receiving a reel or the like on which the overwrap film is stored in the pre-stretched state, characterized in that the receiving means are means for receiving a reel or the like, means for receiving a reel or the like with a substantially cylindrical skirt and chamfered ends on which the overwrapping film is stored in the pre-stretched state at an elongation value of the order of 150 to 500% as well as means for braking the reel or the like adjustable at a tension in the film of between 2 and 7 daN / mm 2 , preferably between 2 and 3 daN / mm 2 of film section per turn, excluding additional means for stretching said film.
  • a machine according to the invention is also characterized in that it further comprises means for supporting reels of the waiting pre-stretched film and means for transferring said reels to the receiving means from which the stored film unwinds in the pre-stretched state.
  • this is of the rotating ring type, that is to say with a fixed burden and means of reception of reel of film stored in the pre-stretched state provided on said rotating ring.
  • the machine is of the "rotating arm” type.
  • the machine is of the "rotating load” type.
  • the machine is of the "curtain" type.
  • the subject of the invention is also the reels or the like on which the overwrapping film of loads grouped according to a load, palletized or not, is stored in the pre-stretched state, and it includes in particular within its framework the reels characterized in that that the pre-stretched film they carry has an elongation of 150 to 500% and exhibits, after relaxation, a tension of between 2 and 7, preferably between 2 and 3, DAN / mm 2 of film section per turn.
  • the Applicant endeavored to conceive a process likely to be implemented on the most varied types of machines and according to which, in order to allow to optimize a pre-stretching of the film of overpacking of loads grouped according to a palletized or non-palletized burden, said film is unwound from a reel or the like on which it is stored in the pre-stretched state with a very large elongation to present, after relaxation, a tension between 2 and 7, preferably 2 and 3, DAN / mm 2 of film section per turn.
  • Such a method in which the step of pre-stretching the film is dissociated from the step of placing on the bundle, then makes it possible to conduct the pre-stretch in an optimal manner, the speeds of stretching and unwinding n 'being more related to the parameters of the film placement phase on the load, in particular to very large variations in film flow from a conventional reel.
  • a coil 10, of stretch film for example of low density polyethylene film or of linear low density polyethylene film as produced by extrusion blow molding or calendering, -and which is delivered in a width which may vary between 200 and 1500 mm, is placed on a vertical mandrel M to allow the film to be unwound by rotation of the reel 10 in the direction of the arrow f , FIG. 1.
  • the film 11, which is caused to circulate around two rubberized or knurled rollers, 12 and 13, with different circumferential speeds is received on a mandrel 18 of generally cylindrical shape, Figure 2, to form a coil 14, rotated by the roller 13 on which it is applied with a large force, adjustable by means of a jack 15 acting on a link 16 one end of which is pivotally mounted about an axis 17 and the other of which bears on the axis of the mandrel 18.
  • the film 11 is significantly elongated and according to the speed ratio of said rollers.
  • the latter can either be driven by motors and linked together by a set of gears or a speed reducer, or can each be connected to a motor, the first of fixed speed and the second of adjustable speed to obtain, whatever the embodiment, a reel 14 of pre-stretched film which does not unwind itself, after the reel has been manufactured, due to the slightly sticky effect of the film, by winding on the mandrel 18.
  • the invention provides for making it as shown in FIG. 2, that is to say in the form of a substantially cylindrical skirt 20, with a wall of thick cardboard, aluminum or plastic and the ends of which are chamfered , as shown in 21 and 22, with a centering cone 23 at the end opposite the open edge of the skirt and a stop 24 adjacent to the cone 23.
  • the presence of the chamfers 21 and 22 makes it possible to compensate for a slight excess thickness of the film 11 on the edges of the mandrel, in the direction of travel, and which would appear in the absence of a particular shape of the ends of the skirt 20 due to the creep of the film during stretching.
  • the first step is to application of a progressive tensile force of 0 to 12 DAN (for an elongation of 0 to 80%) then of a force of 12 to 13 DAN for a subsequent elongation of 80 to 150%, phase a .
  • a relaxation phase, b at the end of which a force of 6 to 7 DAN, -which represents the tension of the film per turn in the reel-, is also the load-holding force during its transport and storage, designated in practice under the name of cohesion force.
  • phase c Such a force, maintained as long as the reel is not used, phase c , is then used when the reel is attached to an overwrapping machine and the film is braked between a value between 0 and said value of 6 to 7 DAN.
  • said force is modulated as a function of the load and the operation of the machine, as shown diagrammatically by the arrows e , of phase d , the latter itself being followed by a phase g , where the hatched part of the diagram in FIG. 3 indicates the extreme values of the residual cohesion forces, between 2 and 7 DAN.
  • the pre-stretching of the film as described above can be longitudinal and / or transverse and reach values of the order of 200 to 500% so that the tension in the reel, after relaxation, is between 2 and 7, preferably between 2 and 3, DAN / mm 2 of film section per turn.
  • a reel of pre-stretched film according to the invention, 14, can be used for overpacking a bundle F on the most varied types of machines.
  • the reel of pre-stretched film can be used in a machine of the "rotating arm" type, in which the reel 14 moves alternately along an upright m at the same time as the pre-stretched film 11 unwinds from the reel and the arm B rotates around an axis A and around the burden F consisting of palletized loads or not.
  • the pre-stretched film reel, 14, can be used in a machine of the "rotating load" type in which the reel 14 moves alternately along an upright m 'in at the same time that the pre-stretched film 11 unwinds from the reel and that the burden F turns on itself as shown diagrammatically by the arrow r , in the case of palletized loads, or is driven by a more complex rotational movement in the cases of non-palletized loads.
  • no complex film stretching mechanism is provided, a simple stretching brake making it possible to modulate the force of application of the film on the load, as described below. above with reference to Figure 4.
  • the overwrapping machine is of the type in which the burden F is first brought by a table with motorized rollers or chains, 30, near the center of a rotating ring 31.
  • the invention provides for associating the bobbin 14 on which the pre-stretched film is stored at the ring 31, on the one hand, and to control the unwinding of the pre-stretched film from the reel 14 by a mechanical brake or, as a variant, by a counter-roller fitted with a brake and which is supported on one of the external generators of the spool.
  • the reel 14 is placed directly by an operator on the rotating ring 31, with which is associated a clamp device 33 which ensures the welding at the end of the pre-film cycle. stretched unwound from the reel 14 as well as the cutting and the resumption of the film for successive loads, a machine of the same type can be provided with a device 40, FIG. 6, comprising means for, using a transfer arm 41-, place on the ring 31 a stand-up reel 14 'when the reel 14 from which the pre-stretched overwrap film is unwound is empty.
  • FIGS. 7 and 8 the rotary ring overwrapping machine 31, -for the rest identical to those described above-, is furthermore provided with a barrel device 50 intended to effect the automatic change of a reel 14 associated with the ring 31 from a plurality of stand-by reels 14 ', 14'', etc., the condition of the machine shown in FIG. 7 being that of wrapping, while that shown in FIG. 8 corresponds to the change of reel, that referenced 14 then has in the vicinity of the clamp 33 being loaded, while an empty mandrel 18 is removed.
  • the change of reel can be carried out , on the laying machine, without stopping production, this results in a great flexibility of operation of the machine, which can be further increased by a device made automatically operational in the event of detection of an "end of spool" or in film breakage.
  • the invention is not limited to the embodiments which have just been described. It also finds application for the overpacking of loads using a machine of the "curtain" type, of the kind shown schematically in FIG. 9, where the burden F mobile on a table with motorized rollers or chains (not shown) is surrounded by the film 11 which unwinds from two reels 14.
  • a simple brake d stretching and guiding means q of the film 11 make it possible to modulate the force of application of the film, the plies from the reel 14 of which are capable of being cut and joined together by the welding jaws p .
  • the application of the invention to such a machine also makes it possible to adapt reels of pre-stretched film to different heights of burden by a simple modification of the transverse elongation of the film.

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  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Basic Packing Technique (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Packaging Of Special Articles (AREA)
  • Electron Beam Exposure (AREA)
  • Packages (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Semiconductor Memories (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
EP93919400A 1992-08-25 1993-08-25 Procede de suremballage de charges a l'aide d'un film etirable, machine et film pour sa mise en oeuvre Expired - Lifetime EP0656853B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9210254 1992-08-25
FR9210254A FR2695102B1 (fr) 1992-08-25 1992-08-25 Procédé de suremballage de charges à l'aide d'un film étirable, machine et film pour sa mise en Óoeuvre.
PCT/FR1993/000827 WO1994004419A1 (fr) 1992-08-25 1993-08-25 Procede de suremballage de charges a l'aide d'un film etirable, machine et film pour sa mise en ×uvre

Publications (2)

Publication Number Publication Date
EP0656853A1 EP0656853A1 (fr) 1995-06-14
EP0656853B1 true EP0656853B1 (fr) 1997-04-02

Family

ID=9433003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93919400A Expired - Lifetime EP0656853B1 (fr) 1992-08-25 1993-08-25 Procede de suremballage de charges a l'aide d'un film etirable, machine et film pour sa mise en oeuvre

Country Status (20)

Country Link
US (1) US5797240A (cs)
EP (1) EP0656853B1 (cs)
JP (1) JP3386075B2 (cs)
KR (1) KR100207305B1 (cs)
AT (1) ATE151029T1 (cs)
CA (1) CA2142615A1 (cs)
CZ (1) CZ289828B6 (cs)
DE (1) DE69309473T2 (cs)
DK (1) DK0656853T3 (cs)
ES (1) ES2099470T3 (cs)
FI (1) FI101367B (cs)
FR (1) FR2695102B1 (cs)
HU (1) HU220304B (cs)
NO (1) NO308651B1 (cs)
PL (1) PL307789A1 (cs)
RO (1) RO113728B1 (cs)
RU (1) RU2089475C1 (cs)
SK (1) SK24395A3 (cs)
UA (1) UA25913C2 (cs)
WO (1) WO1994004419A1 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5967437A (en) * 1997-05-13 1999-10-19 Thimon Machine for winding film, a method of making spools of pre-stretched film, and spools of prestretched film obtained thereby

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EP0614810A1 (en) * 1993-02-26 1994-09-14 Mobil Oil Corporation Stretch wrap film rolls
FR2742416B1 (fr) 1995-12-13 1998-02-06 Thimon Film pre-etire, dispositif et procede de suremballage
FR2748734B1 (fr) * 1996-05-06 1998-07-31 Thimon Film de suremballage, dispositif d'etirage prealable de film et procede de suremballage
GB9626234D0 (en) * 1996-12-18 1997-02-05 Mobil Plastics Europ Inc Wrapping apparatus
AUPO656397A0 (en) 1997-05-01 1997-05-29 First Green Park Pty Ltd Improvements relating to method and apparatus for producing stretch wrap plastic film
US6713010B1 (en) * 1998-06-19 2004-03-30 Marmions, Limited System for stretch-wrapping
EP1105282A4 (en) * 1998-06-23 2005-06-22 Illinois Tool Works FILM ORIENTATION FOR IMPROVING ITS BARRIER PROPERTIES AND STABILITY AT U.V. RAYS
FI106785B (fi) 1999-06-10 2001-04-12 Pesmel Oy Järjestely ja menetelmä kappaleen käärinnän yhteydessä
RU2214952C2 (ru) * 2001-09-12 2003-10-27 Открытое акционерное общество "Западно-Сибирский металлургический комбинат" Устройство для упаковки предметов в пленку
US6848240B2 (en) * 2001-12-26 2005-02-01 Illinois Tool Works Inc. Stretch head for facilitating wrapping palletized loads
RU2283800C1 (ru) * 2005-02-02 2006-09-20 Иван Владимирович Капитонов Машина для упаковки штучных грузов в полиэтиленовую пленку
ITBO20050413A1 (it) * 2005-06-22 2006-12-23 Atlanta Stretch Spa Apparato per la produzione di bobine di film estensibile prestirato longitudinalmente e di diverso peso, partendo da normali bobine di film estensibile
ITRE20050082A1 (it) * 2005-07-15 2007-01-16 Bema Srl Metodo per avvolgere carichi con un nastro di plastica pre-stirato e relativo impianto
CA2669598A1 (en) * 2006-11-17 2008-05-22 Aetna Group S.P.A. Apparatus for changing film reels
BE1017659A3 (nl) 2007-06-21 2009-03-03 Combipac Bv Voorgerokken rekwikkelfolie.
US9676507B2 (en) * 2008-07-23 2017-06-13 Best Packaging, Inc. Stretch wrapping system and process
US9950895B2 (en) 2014-07-03 2018-04-24 Lincoln Global, Inc. Welding wire coil packaging system
US20180111777A1 (en) 2016-10-26 2018-04-26 Cpfilms Inc. Packaged flexible film and flexible film packaging system therefor
US11242165B2 (en) 2018-08-01 2022-02-08 Haloila Bulgaria EOOD Wrapping machine with improved cut, clamp, and seam system
FR3092831B1 (fr) * 2019-02-14 2021-06-04 Thimon Dispositif d’etirage d’un film etirable et banderoleuse
KR20240142919A (ko) 2023-03-22 2024-10-02 주식회사 에이비티산업 신축성 필름을 활용한 적재물 포장장치

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5967437A (en) * 1997-05-13 1999-10-19 Thimon Machine for winding film, a method of making spools of pre-stretched film, and spools of prestretched film obtained thereby

Also Published As

Publication number Publication date
JPH08505829A (ja) 1996-06-25
KR100207305B1 (ko) 1999-07-15
CA2142615A1 (en) 1994-03-03
EP0656853A1 (fr) 1995-06-14
SK24395A3 (en) 1996-05-08
NO308651B1 (no) 2000-10-09
NO950702D0 (no) 1995-02-24
US5797240A (en) 1998-08-25
WO1994004419A1 (fr) 1994-03-03
DE69309473D1 (de) 1997-05-07
HU9500577D0 (en) 1995-04-28
NO950702L (no) 1995-04-24
FI950722A0 (fi) 1995-02-17
FI101367B1 (fi) 1998-06-15
RU2089475C1 (ru) 1997-09-10
FI101367B (fi) 1998-06-15
CZ289828B6 (cs) 2002-04-17
FI950722L (fi) 1995-02-17
RU95106613A (ru) 1996-11-27
DK0656853T3 (da) 1997-10-13
ATE151029T1 (de) 1997-04-15
DE69309473T2 (de) 1997-07-31
HUT71170A (en) 1995-11-28
JP3386075B2 (ja) 2003-03-10
CZ49395A3 (en) 1996-03-13
FR2695102B1 (fr) 1994-11-04
UA25913C2 (uk) 1999-02-26
PL307789A1 (en) 1995-06-26
RO113728B1 (ro) 1998-10-30
KR950702922A (ko) 1995-08-23
FR2695102A1 (fr) 1994-03-04
ES2099470T3 (es) 1997-05-16
HU220304B (hu) 2001-11-28

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