EP0401414A1 - Verfahren zum Herstellen, Befüllen und Zuschweissen eines Kunststoffsacks - Google Patents

Verfahren zum Herstellen, Befüllen und Zuschweissen eines Kunststoffsacks Download PDF

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Publication number
EP0401414A1
EP0401414A1 EP89110448A EP89110448A EP0401414A1 EP 0401414 A1 EP0401414 A1 EP 0401414A1 EP 89110448 A EP89110448 A EP 89110448A EP 89110448 A EP89110448 A EP 89110448A EP 0401414 A1 EP0401414 A1 EP 0401414A1
Authority
EP
European Patent Office
Prior art keywords
filling
bag
film web
station
filling station
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.)
Withdrawn
Application number
EP89110448A
Other languages
German (de)
English (en)
French (fr)
Inventor
Roland Eschbach
Hans Dr. Gerling
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.)
"fix" Peter Steimel & Cokg GmbH
Original Assignee
"fix" Peter Steimel & Cokg GmbH
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 "fix" Peter Steimel & Cokg GmbH filed Critical "fix" Peter Steimel & Cokg GmbH
Publication of EP0401414A1 publication Critical patent/EP0401414A1/de
Withdrawn legal-status Critical Current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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B65B51/146—Closing bags
    • 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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • 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
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/13—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state

Definitions

  • the invention relates to a method for producing, filling with a dust-like or granular filling material and welding a plastic bag, in particular a gusseted bag, starting from a plastic tubular film, in which the tubular film web is pulled from a film roll, the web is drawn vertically upwards directly into the filling station, which cuts a film web provided with a bottom weld seam in the filling station below the bottom weld seam to form a sack, fills the formed sack and provides it with a head weld seam.
  • the invention also relates to a device for carrying out the method with a welding device for forming the bottom weld seam and the corner weld seams, a filling station with a cutting device for separating a bag length from the film web, a filling element and one which can be moved in a vertical plane between a lower receiving position and an upper filling position Bag holder with integrated clamping elements, elements arranged below the pick-up position for guiding the film web into the pick-up position, a bag chair and a welding station with a welding device for forming the head weld.
  • DE-OS 20 07 605 discloses a method for producing and closing filled carrier bags from a tubular material, in which the tubular film is drawn vertically upwards into the filling station. Only after filling does the floor sweat seam is attached and the filled bag is separated from the web. The filled carrier bag is then moved from the filling station to the cooling station with the welding jaws closed on the weld seams and the closed bag chair. Since the bottom weld seam is only formed after filling, the seam does not start to cool down until it is filled, which means that a considerable amount of time is required before it is released.
  • the present invention is based on the object of providing a method and a device for producing, filling and welding plastic bags starting from a plastic tubular film, in which the period from the start of the bag production to the discharge of the filled, sealed bag is shortened.
  • the total cycle time of the process should not be extended by the cooling time required for the bottom weld seam.
  • the production of the bottom and corner weld seams of the bags should not require any additional expenditure of time.
  • horizontal transport of the empty sack and thus another time factor in the context of sack production and filling should be eliminated.
  • the floor was only welded after the web had been pulled into the filling station. Since the weld seam produced according to the invention has not yet cooled sufficiently in the filling station by the time the filling begins, it is clamped in the filling station with a two-part bag chair and thus secured against tearing until it has cooled sufficiently and solidified.
  • the weld seam produced according to the invention has not yet cooled sufficiently in the filling station by the time the filling begins, it is clamped in the filling station with a two-part bag chair and thus secured against tearing until it has cooled sufficiently and solidified.
  • filling plastic sacks with fill weights of 25 or 50 kg it would be detrimental to a high working speed if you wanted to wait until the bottom weld seam has cooled sufficiently before filling begins.
  • the fresh bottom weld seam is relieved by the clamping according to the invention, so that despite high fill weights and possibly shaking during or after filling, the bottom weld seam is hardly stressed.
  • the total cycle time is shortened. Since the bags have essentially already been pre-formed in the film web by the bottom and corner welds previously carried out, the film web can be drawn directly into the filling station, in cycles by the bag length. It is then only necessary to cut a bag length from the drawn-in film web, the cut being made just below the bottom weld seam.
  • the tubular film web is guided essentially in the horizontal direction and, after the bottom and corner weld seams have been applied, it is deflected vertically upwards into the filling station.
  • the horizontal and vertical guidance of the film web and the application of the welds in the horizontal web area result in a reduced overall height for the machine and a compact design.
  • the bottom and corner weld seams are already attached to the film web before the filling station. Since the film web is no longer in motion after the bag length has been drawn in and cut off, these welds can be carried out while the cut bag is still being filled. As a result, welding times that would extend the entire bag manufacturing, filling and sealing cycle are eliminated.
  • the end of the film web is first raised above the cutting plane and then pulled into the filling station. Since the film web is drawn into the filling station with the sack holder, which generally cannot be lowered under the cutting knife, the end of the film web formed during the last cut is raised vertically above the cutting plane to the receiving position of the sack holder. Only there is the end of the film web taken over by the jaws of the bag holder. The film web is therefore drawn into the filling station in two stages, the lifting above the cutting plane corresponding to only a short stroke of, for example, 60 to 100 mm.
  • the upper end of the tubular film is preferably opened while the film web is being drawn into the filling station.
  • the upper free end of the tubular film web can be pulled open and, if necessary, spread, i.e. the first measures required for filling can take place before the bag length is cut off from the web, i.e. the sack was even finished. This has a beneficial effect on shortening the cycle time.
  • the welding device for forming the bottom and corner welds is arranged in front of the elements for guiding the film web into the receiving position, the bottom weld seam of the film web drawn in under the filling element can be clamped off by the two-part bag chair and the bag chair can be moved between the filling station and the welding station to form the head weld.
  • the floor and corner welding device By arranging the floor and corner welding device in front of the filling station or the elements for guiding the web into the filling station and by the two-part bag chair that can be moved between the filling station and the top seam welding station, it is possible to cool the floor welding seams to the phases before, during and after distribute the bag filling and thus integrate it into the process so that the cooling does not require an extension of the process.
  • the sack holder In the process, the sack holder, in its lower position, picks up the end of the film web located in the vertical plane with the clamping elements and pulls it into the upper filling position according to the set sack length.
  • the guide elements hold the film web end approximately vertically in the receiving position, so that it can be gripped by the clamping elements of the lowered bag holder.
  • the elements for guiding the film web comprise a vertically movable pair of clamping jaws and / or a deflection roller deflecting the film web into the vertical plane. Because the clamping elements of the bag holder To receive the film web can not be lowered under the separating device, the end of the film web must be raised above the level of the separating elements, ie the cutting knife, to such an extent that it can be picked up by the clamping elements of the bag holder (receiving position). This is done with the pair of clamping jaws mentioned, which can be moved vertically below the separating device.
  • this pair of clamping jaws detects the film web in its vertical region and lifts it so far above the cutting plane that the web end can be gripped by the clamping elements of the bag holder.
  • the stroke of the vertically movable jaw pair is 80 mm, for example.
  • the pair of jaws opens and moves back down to the starting position.
  • the pair of clamping jaws also serves to hold the film web in the vertical plane.
  • the deflection roller preferably deflects the film web from the horizontal direction into the vertical upward direction.
  • the film supply roll can therefore be arranged laterally next to the above-mentioned vertical or filling level, so that the device has a compact design.
  • the cutting device is arranged between the lower receiving position of the bag holder and the elements for guiding the film web, in particular the pair of clamping jaws mentioned. After the tubular film has been drawn into the filling station, the two-part bag chair closes on the bottom weld seam. The cutting device is arranged close under the bag chair, so that the bag length is cut off just below the bag chair.
  • the welding device for forming the bottom and corner weld seams is expediently arranged in the region of the film web lying in front of the guide elements, in particular between a pair of feed rollers and the deflection roller.
  • the floor and corner welds are carried out by separate welding punches, the floor weld being positioned precisely in relation to the corner welds.
  • the stroke length of the sack holder between the receiving position (in which the end of the film web is grasped) and the filling position (in which the sack is filled) and the arrangement of the parts of the welding device for the bottom and corner weld seams corresponding to the sack length are central adjustable.
  • a new adjustment of the bag length for example due to a change in the type of product or the quantity of product to be bagged, is automatically accompanied by a shift in the welding device. If the sack is shortened, the corner welds are brought closer together in the horizontal area of the film web; if the sack is extended, the corner welding punches are removed from one another. In addition, the head weld is set centrally.
  • the welding device for forming the head weld seam can be locked in a vertical guide by means of a clamping body, the clamping body carries a first coupling part protruding from the guide, and a second coupling part is mounted on a horizontally displaceable transport carriage carrying the sack chair is that when the transport carriage is moved into the head seam welding position, the coupling parts come into engagement with one another, when the sack length is changed, the fixing of the clamping body is canceled and the welding device is repositioned in the guide via the closed coupling.
  • the bag length can be changed.
  • the transport carriage carries the two-part bag chair and the clamps that hold the opening of the filled bag closed.
  • the process begins with a tubular film roll 1, which is rotatably mounted in a double-storey film roll bearing 2.
  • the double-storey bearing 2 is the subject of European Application No.
  • the tubular film web 3 is pulled off by the pull-in roller pair 4 from the respectively connected supply roller 1 and then passes through a horizontal area up to the deflection roller 5.
  • the film web is passed through a welding device 6, in which it is provided with corner weld seams and the bottom weld seam. Since such a welding device is known per se, it was only shown schematically in FIG.
  • a weld seam cooling device can be integrated in the device 6, but this is not absolutely necessary in the context of the present invention.
  • the deflecting roller 5 is arranged in such a way that it deflects the film web 3 into a vertical plane 7, which also represents the central plane of the bag holder 8 and the filling element 9.
  • the film web 3 passes a pair of lifting clamps 11, which holds the web in the vertical plane 7.
  • the pair of clamping jaws 11 closes first.
  • the pair of jaws 11 then raises the end of the film web by, for example, 80 mm Parting plane, ie the level of the cutting device 16.
  • the bag holder 8 shown in FIG. 1 in its upper filling position is designed in a manner known per se. It has two pairs of clamping elements, of which only one pair 12 is visible in FIG. 1.
  • the sack holder 8 can be moved vertically in a laterally arranged guide 13 between the upper filling position shown in FIG. 1 and a lower receiving position, in which the pairs of clamping elements 12 can grip the raised end of the film web. After the film web has been gripped by the clamping element pairs 12, the sack holder 8 moves up to the filling position shown in FIG. 1 and pulls the previously set sack length from the film roll 1.
  • Two squeegee jaws are integrated in the sack holder 8, each containing a central suction nozzle that can be connected to a vacuum source. While the sack holder 8 is moving upwards and the tubular film is being drawn into the filling position, the two suction nozzles 14 lying on the outside of the tubular film wall pull the tubular film in parallelogram form. Two bag spreaders 15, which can be pivoted about parallel axes, can now be immersed in the opened hose opening and, by swiveling them out, bring them into an essentially circular shape. When the bag holder 8 has reached the filling position shown in FIG. 1, the end of the hose is open and thus ready for filling.
  • the bottom weld seam produced during the filling of the previous sack in the device 6 is exactly at the level of the two-part sack chair 20 after the set sack length has been drawn in, which now closes on the bottom weld seam and thereby secures the warm bottom weld seam which is not yet capable of being used.
  • the cutting device 16 is switched, which cuts the film web 3 just below the bag chair 20 and thus the bottom weld seam.
  • the filling begins, the filling element 9 being able to be lowered, for example, to 250 mm above the sack bottom.
  • the filling element 9 shown only partially in FIG. 1 is at the top (Not shown) end also slidably guided on the vertical guide 13.
  • the bag chair 20 can, if desired, perform vibrations during the filling process, while the film web 3 at rest is provided with the corner weld seams and the bottom weld seam by means of a welding device 6.
  • a welding device 6 As already explained, the stroke of the bag holder 8 in the plane 7, the position of the welding device 6 and that of the top seam welding device 31 are set centrally.
  • Figures 2 and 3 show the transport carriage 19 for the horizontal transport of the filled sack 10 from the filling station to the welding station 31 for the formation of the head weld.
  • the transport carriage 19, which is adjustable in height according to the length of the sack 10, carries at the bottom the two-part sack chair 20, which is closed on the way to and in the head seam welding station 31 on the bottom weld seam of the filled sack, and at the top the clamping jaws 21, which hold the sack 10 at the top, as can be seen from Figure 2.
  • the upper edge of the sack 10 projects beyond the clamping jaws 21 and can be moved between the welding jaws 32 to form the head weld seam.
  • the welding device 31 is fastened to a clamping body 33 which is fixed in a vertical guide 34 by pneumatic clamping.
  • the clamping body 33 carries a coupling part 35 a projecting from the vertical guide 34, which in this embodiment is designed as a horizontal bolt.
  • the transport carriage 19 also carries a coupling part 35 b on the top side, which in the embodiment shown is designed as a trestle with one eye.
  • the coupling parts 35 a and 35 b come into engagement and release or release the clamping of the clamping body 33 so that it could move in the vertical guide 34 fixed on the machine frame.
  • the coupling by the parts 35 a and 35 b ensures that the clamping body 33, despite being unlocked, remains in its position in the vertical guide 34 maintains.
  • the bag length is adjusted and the height of the transport carriage 19 also changes, a corresponding positioning of the clamping body 33 in the vertical guide 34 and thus a vertical adaptation of the welding device 31 to the changed position is achieved via the closed coupling 35 a , 35 b Sack length reached.
  • the height of the head seam welding device is automatically positioned without the need for a separate actuator for the height adjustment of the welding device 31.
  • the device shown in FIG. 3 shows a machine with only one head seam welding station 31.
  • a second head seam welding station can be provided so that the high filling speed for granulate material leads to a correspondingly high performance of the entire machine.
  • the filled sacks 10 transported out of the filling station are then alternately fed to both head seam welding stations 31.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
EP89110448A 1988-06-04 1989-06-09 Verfahren zum Herstellen, Befüllen und Zuschweissen eines Kunststoffsacks Withdrawn EP0401414A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19883819040 DE3819040A1 (de) 1988-06-04 1988-06-04 Verfahren und vorrichtung zur herstellung, befuellung und zuschweissung von kunststoffsaecken

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Publication Number Publication Date
EP0401414A1 true EP0401414A1 (de) 1990-12-12

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EP89110448A Withdrawn EP0401414A1 (de) 1988-06-04 1989-06-09 Verfahren zum Herstellen, Befüllen und Zuschweissen eines Kunststoffsacks

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6789376B1 (en) 1999-09-22 2004-09-14 Pactiv Corporation Method and machine for the manufacture of air pillows
US6932134B2 (en) 2003-02-07 2005-08-23 Pactiv Corporation Devices and methods for manufacturing packaging materials
US8627637B2 (en) 1999-09-22 2014-01-14 Pregis Innovative Packaging, Inc. Method and machine for the manufacture of air pillows
US8906478B2 (en) 2005-05-06 2014-12-09 Pregis Innovative Packaging, Inc. Films for inflatable cushions

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004034489A1 (de) * 2004-07-16 2006-04-20 Windmöller & Hölscher Kg Verfahren und Vorrichtung zur Herstellung und Befüllung von Säcken
US10029407B2 (en) 2014-12-04 2018-07-24 Big Heart Pet, Inc. Apparatus, processes, and systems for heat sealing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8807293U1 (de) * 1988-06-04 1988-07-21 "Fix" Peter Steimel GmbH & Co KG, 5202 Hennef Vorrichtung zur Herstellung, Befüllung und Zuschweißung von Kunststoffsäcken

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3070927A (en) * 1959-12-30 1963-01-01 Lundahl Lennart Viktor Samuel Method of and apparatus for making and filling flexible-walled tubes
DE1911457U (de) * 1963-11-11 1965-03-04 Nisterhammer Maschb G M B H Beutel-herstell-, fuell- und schliessmaschinen.
DE2007605A1 (en) * 1970-02-19 1971-09-16 August Wickersheim KG, 2081 Egen buttel Filled and sealed carrier bags prodn
DE2301817C3 (de) * 1973-01-15 1983-11-03 Sieg-Rheinische Registrierwaagenfabrik "fix" Peter Steimel, 5205 Hennef Vorrichtung mit auf einem Kreisumfang angeordneten Stationen zum Herstellen von Seitenfaltensäcken aus einem Seitenfaltenschlauch
DE2526432C3 (de) * 1975-06-13 1984-03-08 Windmöller & Hölscher, 4540 Lengerich Vorrichtung zum Speichern und Zuführen von Ventilsäcken zu Füllmaschinen
NL7611388A (nl) * 1976-10-14 1978-04-18 Wavin Bv Kunststofzak met twee blokbodems.
DE2924776A1 (de) * 1979-06-20 1981-04-09 PHB Weserhütte AG, 5000 Köln Vorrichtung zum verschliessen bzw. verschweissen von kunststoffsaecken

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8807293U1 (de) * 1988-06-04 1988-07-21 "Fix" Peter Steimel GmbH & Co KG, 5202 Hennef Vorrichtung zur Herstellung, Befüllung und Zuschweißung von Kunststoffsäcken

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6789376B1 (en) 1999-09-22 2004-09-14 Pactiv Corporation Method and machine for the manufacture of air pillows
US8627637B2 (en) 1999-09-22 2014-01-14 Pregis Innovative Packaging, Inc. Method and machine for the manufacture of air pillows
US6932134B2 (en) 2003-02-07 2005-08-23 Pactiv Corporation Devices and methods for manufacturing packaging materials
US7347911B2 (en) 2003-02-07 2008-03-25 Pregis Innovative Packaging Inc. Devices and methods for manufacturing packaging materials
US8906478B2 (en) 2005-05-06 2014-12-09 Pregis Innovative Packaging, Inc. Films for inflatable cushions

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DE3819040C2 (enrdf_load_html_response) 1991-01-31
DE3819040A1 (de) 1989-12-07

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