EP0144266A2 - Vorrichtung zum Umhüllen einer Last mit einer dehnbaren Kunststoffolie - Google Patents

Vorrichtung zum Umhüllen einer Last mit einer dehnbaren Kunststoffolie Download PDF

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Publication number
EP0144266A2
EP0144266A2 EP84402428A EP84402428A EP0144266A2 EP 0144266 A2 EP0144266 A2 EP 0144266A2 EP 84402428 A EP84402428 A EP 84402428A EP 84402428 A EP84402428 A EP 84402428A EP 0144266 A2 EP0144266 A2 EP 0144266A2
Authority
EP
European Patent Office
Prior art keywords
film
load
wrapping
envelope
constitute
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
EP84402428A
Other languages
English (en)
French (fr)
Other versions
EP0144266B1 (de
EP0144266A3 (en
Inventor
Jean-Philippe Begnatborde
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.)
Emco International Dite Ste
Original Assignee
Emco International Dite Ste
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 Emco International Dite Ste filed Critical Emco International Dite Ste
Priority to AT84402428T priority Critical patent/ATE29448T1/de
Publication of EP0144266A2 publication Critical patent/EP0144266A2/de
Publication of EP0144266A3 publication Critical patent/EP0144266A3/fr
Application granted granted Critical
Publication of EP0144266B1 publication Critical patent/EP0144266B1/de
Expired 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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/026—Enclosing successive articles, or quantities of material between opposed webs the webs forming a curtain
    • 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

Definitions

  • the present invention relates to a method and a device for wrapping a load with a film of stretchable plastic.
  • US Patent 4,589,091 already describes a method and a device in which the stretchable plastic film is subjected, before its use, to a pre-stretching by passing it successively through two pairs of rollers tangent to each other , the second pair of rollers, located downstream in the direction of travel of the film, being rotated at a peripheral speed greater than that of the rollers of the first pair located upstream.
  • the film thus pre-stretched is then driven in the same direction as the load to be packaged, at a speed equal to that of the displacement of the load. It is also provided, in this patent, to weld and cut the film between two consecutive packed loads.
  • Such a method has the disadvantage that the end of the film is trapped, after pre-stretching, by fingers or sealing bars, which means that the machine must be continuously supplied with loads or products, under penalty of continuously forming film strips, even if there is no product to be wrapped.
  • the relationship between the perimeter of the product to be packaged and the quantity of film delivered is frozen, because the entrainment of the film is linked to the entrafnage of the product by mechanical connection, and the two entrainments are done at the same speed.
  • the machine according to US Pat. No. 3,589,091 is therefore linked to a specific type of product.
  • the welding must always be done in the middle of the width of the load or of the product to be packaged.
  • the disadvantage of such a method is that it limits the use of films, since the film is systematically stretched at a rate higher than that at which this film will be used, and does not take account of the particular shape of the products or fillers to be packaged, which are most often rectangular: for example, the angles of the pallets and the corners or edges of the bundles are not taken into account.
  • the present invention aims to remedy these drawbacks by providing a particularly simple design method and installation, making it possible to control the quantity of film delivered to the quantity of film that is needed to be used, for each load, so to deliver only the quantity of film actually necessary for packaging the load to be packaged, this control being done without any interaction on the percentage of stretching of the film, which is completely independent.
  • this process making it possible to wrap a load with a film of plastic stretchable material, in which the film is subjected, before wrapping the load, to a pre-stretching, is characterized in that the quantity of film used has been measured at all times since the start of the operation of wrapping to constitute the envelope of the load, this quantity of film actually used is compared to the quantity of pre-stretched film which is delivered, and corrected, as the wrapping operation of the load, the quantity of pre-stretched film delivered so that it remains equal to the quantity of film used to constitute the envelope of the load.
  • the process according to the invention can be implemented effectively, either by direct measurement of the film footage used at each instant, from the start of the packaging operation, to constitute the envelope of the load, and by comparison of this footage with the footage of film cut during the same time interval, either by measuring the difference in footage between the film used and the film cut, or again by measuring and comparing the speeds of use and the throughput of the pre-stretched film .
  • the invention also relates to an installation for wrapping a load with a plastic stretch film, comprising at least one reel of stretch film and at least one stretching device disposed between this reel and the load to be wrapped, characterized in that it comprises means for measuring, at each instant, the quantity of film used to constitute the envelope of the load, and means for comparing this quantity of film actually used with the quantity of pre-stretched film which is delivered, the output of these comparison means being connected to a device for controlling the supply of the drive motor or motors of each stretching device, so as to correct, as the operation progresses envelop the load, the quantity of pre-stretched film delivered, so that it remains equal to the quantity of film used to constitute the envelope of the load.
  • the installation shown diagrammatically in FIG. 1 is intended to wrap a load 1, such as a load on a pallet or any other burden, by means of a film of stretchable plastic material 2, delivered from a reel 3, horizontal or vertical axis.
  • the load 1 is wrapped by rotating the latter around an axis 4 parallel to that of the coil 3, that is to say horizontal or vertical.
  • the film delivered from the reel 3 passes through a pre-stretching device 5, of any known type, which consists of two pairs of tangent rollers between which the film passes, namely, a first pair of upstream rollers 6, and a second pair of downstream rollers 7, respectively driven in rotation by motors 8 and 9.
  • the speed of rotation of the downstream rollers 7, entrained by the motor 9, is chosen to be higher than that of the upstream rollers 6 entrained by the motor 8, so as to stretch the film longitudinally.
  • the rate of stretching of the film, which leaves the pre-stretching device 5 at speed V, therefore depends on the ratio of the speeds of rotation of the motors 8 and 9.
  • the film 2 which moves at speed V, passes over a film accumulation device 11, of any known type, constituted for example by an articulated puppet, or else by a roller sets.
  • the film 2 then passes over a deflection roller 12, of fixed position, from which it is deflected in the direction of the lateral surface of the load 1, on which it is applied at a speed of use V 2 .
  • the method and the installation according to the invention use speed sensors 13 and 14 which are associated, respectively, with the downstream stretching rollers 7 and the deflection roller 12, for measuring by speed V 1 the flow rate of the stretched film , and, on the other hand, the speed V 2 of use of the film, the latter varying in particular according to the shape of the charges to be packaged.
  • the speed sensors 13, 14 deliver, at their output, analog or digital signals representing respectively the speeds V and V 2 , and these signals are applied to the two inputs of a comparator 15, the output of which is connected to devices d 'supply of the respective drive motors 8 and 9.
  • the control loop thus formed makes it possible to control the speed V of the flow of the stretched film to the effective speed of use V.
  • the comparator 15 detects any difference, positive or negative, between the speeds V and V 2 , and this comparator then emits, at its output, a corresponding error signal, which is applied so as to vary the speed of rotation of the motor 8, 9 in the appropriate direction to always maintain an equal relationship between the two speeds V and V 2 .
  • Figure 2 illustrates an installation using two film reels 16, 17 with horizontal axes, as shown in Figure 2, or vertical.
  • the films 18, 19, unwound from the respective reels 16, 17, are previously stretched in devices 21, 22, of any known type, for example similar to device 5 in FIG. 1, the ratio of the rotational speeds of the rollers defining the draw rate.
  • the two stretching devices 21, 22 are coupled together, so as to obtain, on each of the elementary films 18, 19, a identical stretching rate and identical speed of film flow rate. This coupling can be carried out either mechanically, electrically or hydraulically.
  • the two elementary films also pass over respective upper 24 and lower 25 return rollers, and they are welded to each other, along a transverse weld bead 26, so as to form a vertical curtain. This welding is carried out by two welding jaws 27, 28, movable vertically.
  • Each product to be packaged 29, being on a horizontal conveyor 31, is situated on one side of the film curtain which extends vertically, in this case to the left of this curtain, in FIG. 2.
  • the products to be packaged for example, loads on a pallet are introduced horizontally into the vertical curtain formed by the two films 18, 19, by a mechanized pusher 32, at constant speed.
  • the load to be packaged 29, on entering the film curtain, during its movement to the right, uses, for its packaging, a quantity of film defined by its own perimeter.
  • On the other side of the film curtain is another horizontal conveyor 33, located in the same horizontal plane as the conveyor 31, and above which is located a holding presser 34 with vertical movement.
  • the load 29 After entering the vertical curtain formed by the films 18, 19, the load 29 passes over the conveyor 33, located to the right of the curtain, and stops downstream of the welding jaws 27, 28, under the holding presser 34 This presser 34 is then lowered, to immobilize the load and prevent it from rolling back. Then, the welding jaws 27, 28, which come from each other, are brought together vertically. pinch together and seal the two elementary films on themselves, to form a posterior weld bead 26a, opposite the anterior weld bead 26.
  • speed sensors 13 and 14 respectively measure the speed V 1 of the flow of the stretched film and the speed V of use of the film, these two sensors being connected, as in the case of FIG. 1, to the two inputs of a comparator 15, the output of which controls the speed of rotation of a motor 35, driving the two stretching devices 21, 22.
  • sensors 13, 14 are used which measure the speeds V 1 , V 2 , other sensors could also be used, either the quantity of film used in a given time, or again the difference in footage between the film used and the film debited.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Wrappers (AREA)
EP84402428A 1983-12-01 1984-11-28 Vorrichtung zum Umhüllen einer Last mit einer dehnbaren Kunststoffolie Expired EP0144266B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84402428T ATE29448T1 (de) 1983-12-01 1984-11-28 Vorrichtung zum umhuellen einer last mit einer dehnbaren kunststoffolie.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8319205A FR2555961B1 (fr) 1983-12-01 1983-12-01 Procede et dispositif permettant d'envelopper une charge avec un film de matiere plastique etirable
FR8319205 1983-12-01

Publications (3)

Publication Number Publication Date
EP0144266A2 true EP0144266A2 (de) 1985-06-12
EP0144266A3 EP0144266A3 (en) 1985-07-10
EP0144266B1 EP0144266B1 (de) 1987-09-09

Family

ID=9294742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402428A Expired EP0144266B1 (de) 1983-12-01 1984-11-28 Vorrichtung zum Umhüllen einer Last mit einer dehnbaren Kunststoffolie

Country Status (4)

Country Link
EP (1) EP0144266B1 (de)
AT (1) ATE29448T1 (de)
DE (1) DE3465952D1 (de)
FR (1) FR2555961B1 (de)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246659A1 (de) * 1986-05-23 1987-11-25 Mima Incorporated Umwickelvorrichtung und -verfahren mit Vorstreckung der Folie in verschiedenen Schritten
US4840006A (en) * 1981-09-30 1989-06-20 International Packaging Machines, Inc. Stretch wrapping machine
US4866909A (en) * 1985-12-04 1989-09-19 Lantech, Inc. High tensile wrapping process
US5054263A (en) * 1989-01-04 1991-10-08 Insinooritoimisto Pesmel Oy Method and apparatus for wrapping a plastic film around a load
US5301493A (en) * 1992-09-25 1994-04-12 Chen Tsung Yen Steplessly adjustable pre-stretched film wrapping apparatus
FR2712565A1 (fr) * 1993-11-19 1995-05-24 Bine Claude Procédé d'emballage de bagages individuels et son dispositif de mise en Óoeuvre.
US20120174533A1 (en) * 2005-04-08 2012-07-12 Lantech.Com, Llc Method and Apparatus For Dispensing An Amount Of Film Relative To Girth
US20170101205A1 (en) * 2014-06-19 2017-04-13 Crawford Packaging Inc. Pallet Wrap Machine Monitor
US9725195B2 (en) 2008-01-07 2017-08-08 Lantech.Com, Llc Electronic control of metered film dispensing in a wrapping apparatus
US9776748B2 (en) 2013-02-13 2017-10-03 Lantech.Com, Llc Containment force-based wrapping
US9908648B2 (en) 2008-01-07 2018-03-06 Lantech.Com, Llc Demand based wrapping
US9932137B2 (en) 2012-10-25 2018-04-03 Lantech.Com, Llc Corner geometry-based wrapping
US10005580B2 (en) 2012-10-25 2018-06-26 Lantech.Com, Llc Rotation angle-based wrapping
US10005581B2 (en) 2012-10-25 2018-06-26 Lantech.Com, Llc Effective circumference-based wrapping
US10053253B2 (en) 2014-10-07 2018-08-21 Lantech.Com, Llc Graphical depiction of wrap profile for load wrapping apparatus
US10227152B2 (en) 2014-01-14 2019-03-12 Lantech.Com, Llc Dynamic adjustment of wrap force parameter responsive to monitored wrap force and/or for film break reduction
US10934034B2 (en) 2015-09-25 2021-03-02 Lantech.Com, Llc Stretch wrapping machine with automated determination of load stability by subjecting a load to a disturbance
US11208225B2 (en) 2018-08-06 2021-12-28 Lantech.Com, Llc Stretch wrapping machine with curve fit control of dispense rate
US11479378B2 (en) 2019-09-09 2022-10-25 Lantech.Com, Llc Stretch wrapping machine with dispense rate control based on sensed rate of dispensed packaging material and predicted load geometry
US11518557B2 (en) 2019-09-19 2022-12-06 Lantech.Com, Llc Packaging material grading and/or factory profiles
US11667416B2 (en) 2017-09-22 2023-06-06 Lantech.Com, Llc Load wrapping apparatus wrap profiles with controlled wrap cycle interruptions

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105438515B (zh) * 2016-01-21 2017-07-11 深圳市华辰机械设备有限公司 一种全自动水桶套袋机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100012A (en) * 1976-11-08 1978-07-11 Butler Automatic, Inc. Driven nip roll splicer
FR2488575A1 (fr) * 1980-08-13 1982-02-19 Batyrev Ruslan Dispositif de mesure et de regulation de l'etirage d'une bande en mouvement
US4413463A (en) * 1980-10-23 1983-11-08 Lantech, Inc. Roller stretch pass through stretching apparatus and process
US4458467A (en) * 1981-03-31 1984-07-10 Infra Pak (Dallas), Inc. Pretensioner for stretchable film web with dancer roller compensation
FR2528020A1 (fr) * 1982-06-07 1983-12-09 Procter & Gamble Europ Procede et dispositif de regulation du pre-etirage d'un film de matiere plastique, en particulier en vue de l'emballage d'une charge

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4840006A (en) * 1981-09-30 1989-06-20 International Packaging Machines, Inc. Stretch wrapping machine
US4866909A (en) * 1985-12-04 1989-09-19 Lantech, Inc. High tensile wrapping process
EP0246659A1 (de) * 1986-05-23 1987-11-25 Mima Incorporated Umwickelvorrichtung und -verfahren mit Vorstreckung der Folie in verschiedenen Schritten
US5054263A (en) * 1989-01-04 1991-10-08 Insinooritoimisto Pesmel Oy Method and apparatus for wrapping a plastic film around a load
EP0459045A1 (de) * 1989-01-04 1991-12-04 Insinööritoimisto Pesmel Oy Verfahren und Vorrichtung zum Umwickeln eines Artikels mit einer Kunststoffolie
US5301493A (en) * 1992-09-25 1994-04-12 Chen Tsung Yen Steplessly adjustable pre-stretched film wrapping apparatus
FR2712565A1 (fr) * 1993-11-19 1995-05-24 Bine Claude Procédé d'emballage de bagages individuels et son dispositif de mise en Óoeuvre.
US20120174533A1 (en) * 2005-04-08 2012-07-12 Lantech.Com, Llc Method and Apparatus For Dispensing An Amount Of Film Relative To Girth
US9187193B2 (en) * 2005-04-08 2015-11-17 Lantech.Com, Llc Method and apparatus for dispensing an amount of film relative to girth
US9908648B2 (en) 2008-01-07 2018-03-06 Lantech.Com, Llc Demand based wrapping
US9725195B2 (en) 2008-01-07 2017-08-08 Lantech.Com, Llc Electronic control of metered film dispensing in a wrapping apparatus
US12221242B2 (en) 2008-01-07 2025-02-11 Lantech.Com, Llc Electronic control of metered film dispensing in a wrapping apparatus
US10005580B2 (en) 2012-10-25 2018-06-26 Lantech.Com, Llc Rotation angle-based wrapping
US9932137B2 (en) 2012-10-25 2018-04-03 Lantech.Com, Llc Corner geometry-based wrapping
US11174056B2 (en) 2012-10-25 2021-11-16 Lantech.Com, Llc Load wrapping apparatus with controlled interventions
US10005581B2 (en) 2012-10-25 2018-06-26 Lantech.Com, Llc Effective circumference-based wrapping
US11111046B2 (en) 2012-10-25 2021-09-07 Lantech.Com, Llc Load wrapping apparatus with rotational data shift
US11111045B2 (en) 2012-10-25 2021-09-07 Lantech.Com, Llc Dynamic rotation angle-based wrapping
US11104464B2 (en) 2012-10-25 2021-08-31 Lantech.Com, Llc Rotation angle-based wrapping of loads with varying dimensions
US10717554B2 (en) 2013-02-13 2020-07-21 Lantech.Com, Llc Containment force-based wrapping
US9776748B2 (en) 2013-02-13 2017-10-03 Lantech.Com, Llc Containment force-based wrapping
US11912445B2 (en) 2013-02-13 2024-02-27 Lantech.Com, Llc Containment force-based wrapping
US10239645B2 (en) 2013-02-13 2019-03-26 Lantech.Com, Llc Packaging material profiling for containment force-based wrapping
US11518558B2 (en) 2013-02-13 2022-12-06 Lantech.Com, Llc Containment force-based wrapping
US11407538B2 (en) 2013-02-13 2022-08-09 Lantech.Com, Llc Packaging material profiling for containment force-based wrapping
US11685567B2 (en) 2014-01-14 2023-06-27 Lantech.Com, Llc Dynamic adjustment of wrap force parameter responsive to monitored wrap force and/or for film break reduction
US10227152B2 (en) 2014-01-14 2019-03-12 Lantech.Com, Llc Dynamic adjustment of wrap force parameter responsive to monitored wrap force and/or for film break reduction
US12378029B2 (en) 2014-01-14 2025-08-05 Lantech.Com, Llc Dynamic adjustment of wrap force parameter responsive to monitored wrap force and/or for film break reduction
US11597554B2 (en) 2014-01-14 2023-03-07 Lantech.Com, Llc Dynamic adjustment of wrap force parameter responsive to monitored wrap force and/or for film break reduction
US10384822B2 (en) * 2014-06-19 2019-08-20 Crawford Packaging Inc. Pallet wrap machine monitor
US20170101205A1 (en) * 2014-06-19 2017-04-13 Crawford Packaging Inc. Pallet Wrap Machine Monitor
US10926906B2 (en) 2014-10-07 2021-02-23 Lantech.Com, Llc Load stability-based wrapping
US10435191B2 (en) 2014-10-07 2019-10-08 Lantech.Com, Llc Projecting containment force for load wrapping apparatus
US10053253B2 (en) 2014-10-07 2018-08-21 Lantech.Com, Llc Graphical depiction of wrap profile for load wrapping apparatus
US11505343B2 (en) 2015-09-25 2022-11-22 Lantech.Com, Llc Stretch wrapping machine with automated determination of load stability by subjecting a load to a disturbance
US11034470B2 (en) 2015-09-25 2021-06-15 Lantech.Com, Llc Stretch wrapping machine with automatic load profiling
US11731793B2 (en) 2015-09-25 2023-08-22 Lantech.Com, Llc Stretch wrapping machine with automatic load profiling
US10934034B2 (en) 2015-09-25 2021-03-02 Lantech.Com, Llc Stretch wrapping machine with automated determination of load stability by subjecting a load to a disturbance
US12172779B2 (en) 2015-09-25 2024-12-24 Lantech.Com, Llc Stretch wrapping machine with automatic load profiling
US11667416B2 (en) 2017-09-22 2023-06-06 Lantech.Com, Llc Load wrapping apparatus wrap profiles with controlled wrap cycle interruptions
US11208225B2 (en) 2018-08-06 2021-12-28 Lantech.Com, Llc Stretch wrapping machine with curve fit control of dispense rate
US11479378B2 (en) 2019-09-09 2022-10-25 Lantech.Com, Llc Stretch wrapping machine with dispense rate control based on sensed rate of dispensed packaging material and predicted load geometry
US11518557B2 (en) 2019-09-19 2022-12-06 Lantech.Com, Llc Packaging material grading and/or factory profiles
US12103719B2 (en) 2019-09-19 2024-10-01 Lantech.Com, Llc Packaging material grading and/or factory profiles

Also Published As

Publication number Publication date
EP0144266B1 (de) 1987-09-09
EP0144266A3 (en) 1985-07-10
DE3465952D1 (en) 1987-10-15
FR2555961A1 (fr) 1985-06-07
FR2555961B1 (fr) 1986-09-12
ATE29448T1 (de) 1987-09-15

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