EP3049331B1 - Maschine für streckverpackungslasten mit dehnfolie - Google Patents

Maschine für streckverpackungslasten mit dehnfolie Download PDF

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Publication number
EP3049331B1
EP3049331B1 EP14789860.5A EP14789860A EP3049331B1 EP 3049331 B1 EP3049331 B1 EP 3049331B1 EP 14789860 A EP14789860 A EP 14789860A EP 3049331 B1 EP3049331 B1 EP 3049331B1
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EP
European Patent Office
Prior art keywords
film
stretching
tension setting
tension
machine
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.)
Active
Application number
EP14789860.5A
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English (en)
French (fr)
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EP3049331A1 (de
Inventor
János GÁL
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.)
Korospack Kft
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Korospack Kft
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Publication date
Application filed by Korospack Kft filed Critical Korospack Kft
Publication of EP3049331A1 publication Critical patent/EP3049331A1/de
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Publication of EP3049331B1 publication Critical patent/EP3049331B1/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
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/56—Rolling articles with wrappers along a supporting surface
    • 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
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
    • B65B57/04—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages and operating to control, or to stop, the feed of such material, containers, or packages
    • 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 machine for wrapping loads with stretchable film.
  • the vertical and top surface of loads can also be wrapped using the machine.
  • the load wrapped with the shrinkable cap is rotated by the turntable and a burner nozzle fastened on a vertically moving carriage shrinks the upper and lower parts of the shrinkable cap circularly and the lateral part along a screw line performing a programmed movement.
  • the application of the shrinkable cap provides appropriate protection to the load owing to the wrapping the upper part of the load.
  • the disadvantage of the machine is that the shrink-hood must be made previously and put onto the load.
  • the manufacturing of the cap requires manual labor, in addition the specific demand of film is great, as well as the energy requirement of the shrinking is also great enough.
  • HUP 210302 discloses a very advantageously applicable machine enabling the stretch wrapping of loads with stretchable film also on the top surface of the load with the film applied for the wrapping of lateral surface.
  • the solution ensures the perfect protection of the goods through continuity of the film, rendering unnecessary applying a shrink hood in this way.
  • the essence of the machine according to the solution is that the film applied for stretch wrapping the lateral surface of the load by winding up along a screw line is led above the load and tilted from vertical position to horizontal one during the rotation of the load. The film is then tilted back to the vertical position during a descending movement and the wrapping of the upper part is made in this way.
  • the machine according to the patent has a base frame, a turntable mounted in it and a mast fastened on the base frame.
  • a carriage vertically moving the film is mounted on the mentioned mast and bushing is supporting the carriage.
  • a shaft is inserted into the bushing and a reel of film is connected to the one end and the tilting actuator is connected to the other end of the shaft.
  • a sensor for the vertical (basic) position and a sensor for the horizontal position are mounted on the base frame, triggering flags mounted on the turntable associated to the corners of the load, as operating elements controlling the tilting.
  • the disadvantage of the machine is that the stretch tension value can attain only the nearest digital value according to the step values, so it cannot be followed proportionally, consequently the tension of the film cannot be set precisely.
  • the film can occasionally be torn by the sharp corners of a load.
  • the film can break to inside the corners of the most loaded lower layers of the loads packed in cardboard and corrugated paper boxes.
  • the swingarm deviating along a circular arc under influence of the tension of the film is pulled or pushed by one or more springs with quasi constant force - between the two end positions of the deviation - to the direction corresponding to the smaller tension of the film.
  • the problem with this solution is that the pulling or pushing force of the springs is not linear along the length of pulling or pushing, consequently a pre-stretching unit with springs has also not linear but progressive behavior.
  • USP 4706443 discloses a wrapping machine and operation for wrapping and operation for wrapping load with stretchable film under substantially constant tension during the wrapping operation.
  • This machine is provided with pre-streching rollers (18, 32), pre-streching motor (20), a dancer arm (40) provided with roller (38), an air cylinder (52) with piston (54).
  • the machine is provided with an air regulator and a motor control (88).
  • the machine of the above patent is capable for wrapping only the side surfaces of the load on pallet by stretch film, trying to avoid the film breakage, which mainly happens on edges bordered by two neighboured plains of the load.
  • the machine of the patent is only able to change the film feeding speed after the stepping over the bottom level and the top level of film tension
  • the machine can not intervene in the intermediate positions as shown on figure 9 of the description.
  • the “constant” film tension may be understood only between certain limits.
  • the machine according to the patent is used to minimize the breakage on the edges, and it is not effective enough to avoid film breakage on the corners.
  • the motor of the above patent is a DC motor.
  • the aim of our invention to develop a machine for wrapping vertical and top surface of loads with stretchable film.
  • the machine of our invention is following the angular displacement directly proportional to the film tension between the load and the pre-stretching rollers with the signals of an analogous displacement transducer.
  • the analogous displacement transducer can accept not only a small number of digital values but even several hundreds of individual values.
  • the pre-stretching motor responds quicker, more accurately and with smaller redundancy under the influence of the increased tension
  • the required value of the film tension can be better approached and kept by means of the regulating action of increased accuracy during the whole duration of the wrapping.
  • an analogous displacement transducer is sending is sending signals to a frequency changer, which is characterized by the resultant of the pressure set and the pulling force of the film.
  • the frequency changer can regulate the rotary speed of the pre-streching motor until the quantity of the film becomes equal to wrap the vertical and top surface of the load.
  • the subject matter of the invention is a machine for wrapping vertical and top surface of loads with stretchable film having a base frame, a turntable mounted in it and a mast fastened to the base frame, a carriage moving vertically a film reel is fastened to the mast, bushings are formed on the carriage, a shaft is inserted through it, a tilting actuator is connected to the one end and a film reel is connected to the other end of the shaft and a home position sensor and a horizontal position sensor are arranged on the base frame, tilting controlling triggering flags associated to the corners of the load and a home position actuating element are fastened to the turntable, it is provided with a swinging film tension setting unit connected to the other end of the shaft, which unit has pre-stretching rollers provided with a pre-stretching motor, a leading roller containing an arm provided with a roller, a tension setting pneumatic cylinder provided with an analogous displacement transducer and equipped with a piston provided with magnet, furthermore a pressure regulator is fastened to the frame
  • the pressure regulator - which is in connection with the tension setting pneumatic cylinder being regulated by the resultant of the pressure and the pulling force of the film - is applicable to set a reference value and several pre-sets of pressure in it
  • the tension setting pneumatic cylinder is in connection with the analogous displacement transducer, which is in signal connection with a frequency changer, which is regulating the rotary speed of the a pre-stretching motor.
  • the turntable of the machine is driven with a turntable driving motor.
  • the piston provided with magnet of the machine is moved between two end positions in relation to the set reference value through the pressure regulator.
  • the Figure 1 shows the schematic representation of the machine, while the Figure 2 shows the regulating elements of the machine and their connections.
  • the Figure 1 shows an advantageous embodiment of the machine.
  • the solution covers among others also those machines having more than two pre-stretching rollers and their drive can be either identical to the one shown or different from it.
  • the base frame 1, the turntable 2 mounted in it and the load 13 is positioned on the turntable 2 are shown in the Figure 1 .
  • the carriage 4 vertically moving the film reel 7 is fastened to the mast 3 mounted on the base frame 1 and bushing 5 are formed on the carriage 4.
  • a shaft 6 is inserted into bushing 5, a tilting actuator 8 is connected to the one end and a film tension setting unit 22 is connected to the other end of it.
  • the home position sensor 9 and the horizontal position sensor 10 are arranged on the base frame 1, and (tilting controlling) triggering flags 12A, 12B, 12C, 12D are controlling the tilting associated to the corners of the load 14, as well as a home position sensor 9 are mounted on the turntable 2.
  • the swinging film tension setting unit 22 fastened to the frame of the film holding and pre-stretching unit 23 has pre-stretching rollers 7A provided with a pre-stretching motor 20, a leading roller 7B containing an arm provided with a roller 7C, a tension setting pneumatic cylinder 16 having an analogous displacement transducer 17 and supplied with a piston provided with magnet 16A, a pressure regulator 18 and a frequency changer 15.
  • the film winded off from the film reel 7 is led between the pre-stretching rollers 7A connected one to another with a transmission 19 and one of them is driven with the pre-stretching motor 20, then the film is led around a leading roller 7B having an arm moving around a centre of rotation and the arm is provided with a roller 7C.
  • the arm provided with the roller 7C is connected to a piston provided with magnet 16A and the piston provided with magnet 16A is arranged in a tension setting pneumatic cylinder 16 provided with an analogous displacement transducer 17.
  • the piston provided with magnet 16A is connected to a pressure regulator 18 and a frequency changer 15.
  • the frequency changer 15 is connected also to the pre-stretching motor 20 of the pre-stretching rollers 7A.
  • the turntable 2 is driven with a turntable driving motor 21.
  • the piston provided with magnet 16A is moved by a pressure regulator 18 between two end positions in relation to the set reference value.
  • the transmission 19 can be of any usual type, advantageously one with chain, V-belt, gears, timing belt etc.
  • the Figure 2 shows the tension setting pneumatic cylinder 16 having the piston provided with magnet 16A and the analogous displacement transducer 17 connected to the pressure regulator 18.
  • the machine contains a tension setting pneumatic cylinder 16 equipped with a piston provided with magnet 16A, charged on one side and a pressure regulator 18 connected to it, applicable for setting the tension of the film in relation to a targeted reference value.
  • the tension setting pneumatic cylinder 16 is provided with an analogous displacement transducer 17 measuring the position of the piston provided with magnet 16A, The transducer transforms the position to an electric signal characterizing it and regulates with that the film pre-stretching motor 20 through a frequency changer 15.
  • the piston provided with magnet 16A moves towards the one end position.
  • the rotary speed of the pre-stretching motor 20 is then diminished; it wraps the load 13 with less film during a unit of time until that film quantity during the unit of time becomes equal to or less than the quantity sufficient to wrap the load 13.
  • the load 13 "pulls" the film because of that, it becomes stretched and the force characterizing its tension moves the arm provided with roller 7C towards the position characterizing the tersioned film.
  • the piston provided with magnet 16A of the tension setting pneumatic cylinder 16 will be moved towards the other end position at the same time. Consequently, the analogous displacement transducer 17 sends accelerating signal to the frequency changer 15, which sends accelerating signal to the pre-stretching motor 20.
  • the current position of the piston provided with magnet 16A is regulated by the resultant of the pressure set and the pulling force arising on the film.
  • the pulling or pushing force of the tension setting pneumatic cylinder 16 can be set in the whole length of path, the pressure can be measured, so the stretching force can be repeated.
  • the horizontal axis of the film tension setting unit 22 encloses an angle of twentyfive degrees with the radial direction of the main rotating movement, so the upper edge of the film turned to horizontal on the side of the real or imaginary centre of the main rotating movement is not elongated in such a great extent that it could lose the ability of shrinking back.
  • the advantages of the machine according to the invention are as follows: It follows the angular displacement directly proportional to the film tension between the load 13 and the pre-stretching rollers 7A with an analogous signal of a contactless displacement transducer 17, which can accept not only a small number of digital values but even several hundreds of individual values. The measurement of the tension is more accurate, the regulating action is quicker and the difference of the tensions to be compensated becomes smaller.
  • the pre-stretching motor 20 responds quicker, more accurately and with smaller redundancy under the influence of the increased tension
  • the required value of the film tension can be better approached and kept by means of the regulating action of increased accuracy during the whole duration of the wrapping.
  • the swinging film tension setting unit 22 which can be operated with motor-driven pre-stretching and at several pre-sets of pressure, adjustable in analogous way can be a separate complement of the machine wrapping with stretchable film, which can be built on all types of the machines wrapping with stretchable film, e. g. to the constructions with rotating arm or rotating ring, and the wrapping with film can be solved on a machine wrapping with stretchable film of any type with a relatively small cost using the stretchable film used for wrapping the lateral surfaces of the load 13.

Landscapes

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

Claims (1)

  1. Eine Maschine für Einwicklung der senkrechten und oberen Oberflachen der Pakere (13) mit einer Dehnfolie, die einen Grundrahmen (1), einen darin montierten Drehtisch (2) und einen zum Grundrahmen (1) befestigten Mast (3) hat, ein eine Folienrolle (7) senkrecht bewegender Wagen (4) ist zum Mast (3) befestigt, es sind Lagerbüchsen (5) auf dem Wagen (4) ausgeformt, eine Achse (6) ist dadurch eingepasst, eine Kippvorrichtung (8) ist mit dem einen Ende der Achse (6) und eine Folienrolle (7) ist mit dem anderen Ende der Achse (6) verbunden, ein Sensor der Grundstellung (9) und ein Sensor der waagerechten Position (10) sind auf dem Grundrahmen (1) montiert, das Kippen kontrollierende mit den Ecken (14) des Pakets (13) verbundene ausschaltende Signalflaggen (12A, 12B, 12C, 12D) und ein die Grundstellung bewegende Element (11) sind zu dem Drehtisch (2) befestigt, der mit einer die Spannung der Folie einstellenden schwingenden Einheit (22) versehen ist, die mit dem anderen Ende der Achse (6) verbunden ist, die Einheit hat vorspannenden Rollen (7A), einen vorspannenden Motor (20) und eine mit einer Rolle (7C) versehenen Arm, einen die Vorspannung einstellenden mit einem analogen Sender der Verschiebung (17) und mit einem Magnet (16A) ausgerüsteten Kolben versehene pneumatische Zylinder (16) enthaltende leitende Rolle (7B) und auch ein Druckregler (18) ist auf dem Rahmen der die Folie haltende und vorspannende Einheit (23) befestigt, darin die Folic von der Folienrolle (7) abgewickelt und zwischen den vorspannenden Rollen (7A) geleitet wird, die miteinander durch eine Transmission (19) verbunden und nur ein von ihnen mit dem vorspannenden Motor (20) angetrieben wird, dann die Folie wird um die leitende Rolle (7B) geführt, die mit einem um ein Zentrum drehenden Arm und mit einer Rolle (7C) versehen ist, der Arm ist mit dem mit dem Magnet (16A) versehenen und im pneumatischen Zylinder (16) montierten Kolben verbunden, damit gekennzeichnet dass der Druckregler (18), der mit dem Spannung einstellenden pneumatischen Zylinder (16) verbunden ist, der durch die Resultierende des Drucks und der spannenden Kraft der Folie geregelt wird, eignet sich, einen Referenzwert und mehreren vorherig eingestellten Druckwerte darin einzustellen, der die Spannung einstellende pneumatische Zylinder (16) mit dem analogen Sender der Verschiebung (17) verbunden ist, der mit einem Frequenzregler (15) durch eine Signalverbindung verbunden ist, und der Letzte die Drehzahl des vorspannenden Motors (20) regelt.
EP14789860.5A 2013-09-12 2014-09-02 Maschine für streckverpackungslasten mit dehnfolie Active EP3049331B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU1300528A HU230529B1 (hu) 2013-09-12 2013-09-12 Berendezés egység rakományok burkolására nyújtható fóliával
PCT/HU2014/000079 WO2015036807A1 (en) 2013-09-12 2014-09-02 Machine for stretch wrapping loads with stretchable film

Publications (2)

Publication Number Publication Date
EP3049331A1 EP3049331A1 (de) 2016-08-03
EP3049331B1 true EP3049331B1 (de) 2018-08-22

Family

ID=89991248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14789860.5A Active EP3049331B1 (de) 2013-09-12 2014-09-02 Maschine für streckverpackungslasten mit dehnfolie

Country Status (4)

Country Link
EP (1) EP3049331B1 (de)
ES (1) ES2691958T3 (de)
HU (1) HU230529B1 (de)
WO (1) WO2015036807A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700082727A1 (it) * 2017-07-20 2019-01-20 Aetna Group Spa Metodo e macchina per avvolgere un carico con un film
CN108387349B (zh) * 2018-05-28 2023-11-24 杭州国辰机器人科技有限公司 一种食品行业套标膜通用漏气检测系统
CN113381160B (zh) * 2021-06-18 2022-07-01 上海航天测控通信研究所 一种薄膜天线张紧力主动调整机构
DE102024108340A1 (de) * 2024-03-22 2025-09-25 Krones Aktiengesellschaft Verfahren zur Folienverpackung von Palettenstapeln und Wickelvorrichtung zur Verpackung von Palettenstapeln mit mehreren Folienlagen
CN118650897B (zh) * 2024-06-26 2025-01-03 佛山市百莱特新材料有限公司 一种热熔胶金属卷材覆膜装置

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Publication number Priority date Publication date Assignee Title
US4458467A (en) * 1981-03-31 1984-07-10 Infra Pak (Dallas), Inc. Pretensioner for stretchable film web with dancer roller compensation
US4706443A (en) * 1982-05-04 1987-11-17 International Packaging Machines, Inc. Constant tension stretch wrapping machine
DE3633680A1 (de) 1986-10-03 1988-04-14 Dentz Verpackungsmaschinen Gmb Vorrichtung zum schrumpfen von verpackungsfolien
DE3941940C1 (de) * 1989-12-19 1991-03-21 B. Hagemann Gmbh & Co, 4430 Steinfurt, De
US6370839B1 (en) * 1999-08-10 2002-04-16 Sekisui Jushi Kabushiki Kaisha Stretch wrapping machine
US6185914B1 (en) * 1999-09-10 2001-02-13 1137508 Ontario Ltd. Pre-stretch web dispenser
IT1319650B1 (it) * 2000-11-14 2003-10-23 Sestese Off Mec Aspo svolgitore dotato di mezzi di disattivazione del trascinamento.
GB0812903D0 (en) * 2008-07-15 2008-08-20 Rota Eng Ltd Linear actuator and position sensing apparatus therefor
DE102010034994B4 (de) * 2010-08-20 2012-06-06 Festo Ag & Co. Kg Messeinrichtung und Verfahren zur Erfassung und Verarbeitung einer Position eines Messglieds

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Also Published As

Publication number Publication date
HUP1300528A2 (en) 2015-03-30
HU230529B1 (hu) 2016-11-28
ES2691958T3 (es) 2018-11-29
WO2015036807A1 (en) 2015-03-19
EP3049331A1 (de) 2016-08-03

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