EP0161449A1 - Device for closing filled bags - Google Patents

Device for closing filled bags Download PDF

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Publication number
EP0161449A1
EP0161449A1 EP85103921A EP85103921A EP0161449A1 EP 0161449 A1 EP0161449 A1 EP 0161449A1 EP 85103921 A EP85103921 A EP 85103921A EP 85103921 A EP85103921 A EP 85103921A EP 0161449 A1 EP0161449 A1 EP 0161449A1
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EP
European Patent Office
Prior art keywords
sack
bars
pressure
bag
closing
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
EP85103921A
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German (de)
French (fr)
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EP0161449B1 (en
Inventor
Konrad Tetenborg
Helmut Hüwelmann
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.)
Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication date
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Priority to AT85103921T priority Critical patent/ATE29007T1/en
Publication of EP0161449A1 publication Critical patent/EP0161449A1/en
Application granted granted Critical
Publication of EP0161449B1 publication Critical patent/EP0161449B1/en
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    • 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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/02—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks
    • B65B7/06—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks by collapsing mouth portion, e.g. to form a single flap
    • B65B7/08—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks by collapsing mouth portion, e.g. to form a single flap and folding

Definitions

  • the invention relates to a device for closing filled sacks consisting at least partially of thermoplastic material, preferably large sacks with a filling volume of 1 m 3 and more, with a conveyor device, preferably a conveyor belt, which drives the filled sacks into the closing station, with the upper end of the sack above the sack filling pulling apart and tightening spreading devices, with pressure strips that can be lowered onto the sack filling and parallel to each other on both sides of the tightened sack end, which in the lowered position delimit a gap between them for the passage of the sack end, and with a closing device provided above the pressure strip.
  • a conveyor device preferably a conveyor belt
  • a device of this type known from DE-AS 12 65 643 is provided with a U-shaped deflection rail which is articulated via a lever to the handlebar carrying a pressure bar and which is pivotable via a pressure medium piston cylinder unit via the upper end of the bag released by the S means that the latter is pivotable is folded onto itself and, when the conveyor belt is switched on again, it is introduced in the folded form into guide rails, via which it is fed to a sewing machine which fixes the folded end of the bag.
  • the object of the invention is therefore to provide a device of the type specified at the outset, with which the bag ends, in particular filled large bags, can be welded in a simple manner and firmly connected to the bag, so that they form compact packaging that can be stored well.
  • the closing device consists of welding strips engaging between the spreading devices and the pressure strips on the end of the bag and arranged on both sides thereof, that the pressure bar at the rear in the conveying direction is provided with adhesive nozzles directed against the upper bag wall pressed against the bag filling, and in that the front pressure bar in the conveying direction has a folding edge or rod facing the end of the bag, which folds it down after the conveyor has started up after forming the head weld seam and opens the welding jaws onto the flattened trailing half of the top of the bag provided with glue strips.
  • the front in the conveying direction pressing strip may be provided with directed against the folded over bag end glue nozzles.
  • the protruding frames of the folded end of the sack are then folded onto the glue strips applied by these adhesive nozzles in a downstream station, pressed on and thereby fixed.
  • a large sack 2 filled with filling material is transported from the upstream filling station to the welding and gluing station 3 shown in the drawing.
  • the upper open end of the bag 4 is held vertically and taut in width by grippers 5, which are moved along with the conveyor belt 1 in a manner not shown.
  • the welding and gluing station 3 has a frame with two side parts, of which only the rear side part 6 is indicated.
  • a shaft 7 is mounted in the two side parts 6 and can be rotated by the angle OG by means of a pivot lever 8 attached to it via the piston-cylinder unit 8 '.
  • the piston-cylinder unit 8 ' is fastened via a bracket 10 to a crossbar 11 connecting the two side frames 6.
  • two links 12 are placed at a distance from one another, which act as parallel links with two further links 13 placed on a shaft 14, since their free ends are connected in an articulated manner to a holder 15 which consists of two vertical plates 16 and a cross member 17 connecting them.
  • the plates 16 are also connected to one another by three shafts 18-20, the entire holder 15 being held by the links 12 and 13 encompassing the shafts 18 and 20.
  • the shaft 19 as well as on the shaft 20 two equally spaced levers 21 and 22 are clamped at one end, which are articulated at the other ends with vertical arms 23, which are welded with their lower two ends to a support profile 24.
  • This support profile carries a press rake consisting of several bars 25.
  • Two hot-melt adhesive nozzles 26 arranged at a distance from one another are also still attached to the support profile 24, which can be supplied in a manner not shown from a reservoir via supply lines with adhesive if required.
  • the levers 21 and 22 can be pivoted parallel to one another via the piston-cylinder unit 27, which is connected to the cross member 17 and the pivoting lever 28 clamped onto the shaft 20.
  • the right side of the machine facing the viewer has a simpler structure.
  • the rake bars 25 ' are also connected to a support profile 24 'and the latter in turn with arms 23', the arms 23 'being attached to the levers 21' and 22 '.
  • the levers 21 'and 22' are fixedly connected with their ends facing away from the arms 23 'to two shafts 19' and 20 ', with the pivot lever 28' additionally being clamped onto the shaft 19 ', so that the arms 23' and thereby the rake rods 25 'can also be pivoted from the position shown in full lines to that shown in dashed lines, specifically by the piston-cylinder unit 27' acting on the pivot lever 28 '.
  • the shafts 19 'and 20' are mounted in two vertical plates 16 ', which are held by a crossbar.
  • the support profile 24 ' On the side facing the edge 4, the support profile 24 'has two hot-melt adhesive nozzles 26' arranged at a distance from one another, which are identical to the nozzles 26.
  • the sack 2 is moved into the station 3 with the edge 4 held taut and held in the direction of arrow A by tongs 5, the tongs 5 having been lowered so far that the upper edge of the sack maintains its height during the subsequent processing steps, that is to say the sack material located below the tongs 5 hangs down lumpy and wrinkled up to the level of the filling material in the manner indicated by the dot-dash line.
  • the rake bars on the left with reference to the figure assume the position shown in full lines.
  • the sack 2 or that The bag conveyor belt 1 is stopped as soon as the bag edge 4 is in front of the fixed welding jaw 31. At this time, the counter jaw 32 is pivoted up.
  • the piston-cylinder unit 8 ' is then actuated, as a result of which the rake bars 25 are pivoted into the position B, which is only indicated. They then assume the same altitude as the rake bars 25 'shown with solid lines.
  • the piston-cylinder units 27 and 27 ' are then actuated approximately simultaneously, the rake bars 25 and 25' pressing the filling material from above and thereby squeezing out the air located in the bag 2 above the filling material. Subsequently, the counter jaw 32 against the sealing jaw 31 - pivoted and thereby welded to the bag edge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)
  • Making Paper Articles (AREA)
  • Closing Of Containers (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Abstract

Apparatus for closing filled sacks, preferably large sacks, which consist at least in part of thermoplastic material, comprises a feeder for feeding the filled sacks into a closing station. The feeder preferably comprises a roller conveyor or a belt conveyor. The apparatus also comprises means for holding the top end portion the sack above the contents of the sack, pressure-applying bars, which are parallel to each other and adapted to be lowered onto the contents of the sack on both sides of the sack end portion, which is held taut, which pressure-applying bars when in a lower position define between them a gap for the passage of the sack between said bars, and closing means provided above the pressure-applying bars. The closing means comprise welding bars and backing bars, which engage the sack end portion between the end-holding means and the pressure-applying bars and are disposed on opposite sides of said sack end portion. That of the pressure-applying bars which is disposed on the trailing side of the sack is provided with adhesive discharge nozzles directed toward the upper wall portion of the sack in contact with the contents of the sack, and that of said pressure-applying bars which is disposed on the leading side of the sack comprises a folding edge or folding rod, which faces the end of the sack. When the end seam weld has been formed and the welding and backing bars have released the sack and the conveyor has subsequently been restarted said folding edge or folding rod causes the end portion of the sack to be folded down onto and forced against the flattened upper portion of the trailing wall of the sack.

Description

Die Erfindung betrifft eine Vorrichtung zum Verschließen gefüllter aus zumindest teilweise aus thermoplastischem Material bestehender Säcke, vorzugsweise Großsäcke mit einem Füllvolumen von 1m3 und mehr, mit einer die gefüllten Säcke in die Schließstation einfahrenden Fördereinrichtung, vorzugsweise einem Förderband, mit das obere Sackende oberhalb der Sackfüllung auseinanderziehenden und straffhaltenden Spreizeinrichtungen, mit beidseits des straffgehaltenen Sackendes auf die Sackfüllung absenkbaren und zueinander parallelen Andrückleisten, die in der abgesenkten Stellung einen Spalt zum Durchtritt des Sackendes zwischen sich begrenzen, und mit einer oberhalb der Andrückleiste vorgesehenen Verschließeinrichtung.The invention relates to a device for closing filled sacks consisting at least partially of thermoplastic material, preferably large sacks with a filling volume of 1 m 3 and more, with a conveyor device, preferably a conveyor belt, which drives the filled sacks into the closing station, with the upper end of the sack above the sack filling pulling apart and tightening spreading devices, with pressure strips that can be lowered onto the sack filling and parallel to each other on both sides of the tightened sack end, which in the lowered position delimit a gap between them for the passage of the sack end, and with a closing device provided above the pressure strip.

Eine aus der DE-AS 12 65 643 bekannte Vorrichtung dieser Art ist mit einer über Hebel an die eine Andrückleiste tragenden Lenker angelenkte U-förmige Umlenkschiene versehen, die über eine Druckmittelkolbenzylindereinheit derart über das von den Spreizeinrichtungen freigegebene obere Sackende schwenkbar ist, daß dieses auf sich gefaltet wird und beim erneuten Einschalten des Förderbandes in der gefalteten Form in Leitschienen eingeführt wird, über die es einer das umgefaltete Sackende fixierenden Nähmaschine zugeführt wird.A device of this type known from DE-AS 12 65 643 is provided with a U-shaped deflection rail which is articulated via a lever to the handlebar carrying a pressure bar and which is pivotable via a pressure medium piston cylinder unit via the upper end of the bag released by the S means that the latter is pivotable is folded onto itself and, when the conveyor belt is switched on again, it is introduced in the folded form into guide rails, via which it is fed to a sewing machine which fixes the folded end of the bag.

Insbesondere bei Großsäcken besteht das Bedürfnis, das offene obere Sackende nach der Befüllung durch eine Schweißnaht zu schließen und an dem Sack zu befestigen.In the case of large sacks in particular, there is a need to close the open upper sack end after filling by means of a weld seam and to fasten it to the sack.

Aufgabe der Erfindung ist es daher, eine Vorrichtung der eingangs angegebenen Art zu schaffen, mit der sich in einfacher Weise die Sackenden insbesondere von gefüllten Großsäcken verschweißen und fest mit dem Sack verbinden lassen, so daß diese kompakte, gut lagerfähige Verpackungen bilden.The object of the invention is therefore to provide a device of the type specified at the outset, with which the bag ends, in particular filled large bags, can be welded in a simple manner and firmly connected to the bag, so that they form compact packaging that can be stored well.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die Verschließeinrichtung aus zwischen den Spreizeinrichtungen und den Andrückleisten an das Sackende angreifenden und beidseits von diesem angeordneten Schweißleisten besteht, daß die in Förderrichtung hintere Andrückleiste mit gegen die auf die Sackfüllung angedrückte obere Sackwandung gerichteten Klebstoffdüsen versehen ist und daß die in Förderrichtung vordere Andrückleiste eine dem Sackende zugewandte Faltkante oder -stange besitzt, die dieses nach dem Anfahren des Förderers nach dem Bilden der KopfschweiBnaht und öffnen der Schweißbacken auf die mit Leimstreifen versehene flachgedrückte nachlaufende Hälfte der Sackoberseite umlegt und andrückt.According to the invention, this object is achieved in that the closing device consists of welding strips engaging between the spreading devices and the pressure strips on the end of the bag and arranged on both sides thereof, that the pressure bar at the rear in the conveying direction is provided with adhesive nozzles directed against the upper bag wall pressed against the bag filling, and in that the front pressure bar in the conveying direction has a folding edge or rod facing the end of the bag, which folds it down after the conveyor has started up after forming the head weld seam and opens the welding jaws onto the flattened trailing half of the top of the bag provided with glue strips.

Mit der erfindungsgemäßen Vorrichtung lassen sich kompakte etwa quaderförmige verschlossene Säcke schaffen, die sich raumsparend lagern und transportieren lassen. Beim Umlegen des oberen Sackendes kann dieses von den Spreizeinrichtungen freigegeben oder abgezogen werden.With the device according to the invention, compact, approximately cuboid, closed bags can be created which can be stored and transported in a space-saving manner. When the upper end of the sack is folded down, it can be released or pulled off by the spreading devices.

Um auch die über den Sack seitlich überstehenden Fahnen des umgelegten und auf dem Sack fixierten Sackendes auf dem Sack zu befestigen, kann in weiterer Ausgestaltung der Erfindung die in Förderrichtung vordere Andrückleiste mit gegen das umgelegte Sackende gerichteten Klebstoffdüsen versehen sein. Auf die durch diese Klebstoffdüsen aufgetragenen Leimstreifen werden sodann die überstehenden Fahmen des umgelegten Sackendes in einer nachgeschalteten Station gefaltet, angedrückt und dadurch fixiert.To the laterally projecting beyond the bag F teeth of the folded and fixed to the bag bag end on the sack to be attached, in a further embodiment of the invention, the front in the conveying direction pressing strip may be provided with directed against the folded over bag end glue nozzles. The protruding frames of the folded end of the sack are then folded onto the glue strips applied by these adhesive nozzles in a downstream station, pressed on and thereby fixed.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further advantageous embodiments of the invention are the subject of the dependent claims.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung, in deren einziger Figur die Verschließvorrichtung im Schnitt dargestellt ist, näher erläutert.An embodiment of the invention is explained below with reference to the drawing, in the single figure of which the closing device is shown in section.

Auf dem Förderband 1 wird in Förderrichtung A von einer vorgeschalteten Füllstation ein mit Füllgut gefüllter Großsack 2 zu der in der Zeichnung dargestellten Verschweiß-und Beleimstation 3 transportiert. Während des Transports wird dabei das obere offene Sackende 4 durch mit dem Förderband 1 in nicht dargestellter Weise mitbewegte Greifer 5 senkrecht und in der Breite straff gehalten.On the conveyor belt 1, in the conveying direction A, a large sack 2 filled with filling material is transported from the upstream filling station to the welding and gluing station 3 shown in the drawing. During transport, the upper open end of the bag 4 is held vertically and taut in width by grippers 5, which are moved along with the conveyor belt 1 in a manner not shown.

Die Verschweiß- und Beleimstation 3 weist ein Gestell mit zwei Seitenteilen auf, von denen nur das hintere Seitenteil 6 angedeutet ist. In den beiden Seitenteilen 6 ist eine Welle 7 gelagert, die mittels eines auf ihr befestigten Schwenkhebels 8 über die Kolbenzylindereinheit 8' um den Winkel OG verdreht werden kann. Die Kolbenzylindereinheit 8' ist dabei über eine Konsole 10 an einer beide Seitengestelle 6 verbindenden Traverse 11 befestigt. Auf die Welle 7 sind neben dem Schwenkhebel 8 zwei Lenker 12 mit Abstand zueinander aufgesetzt, die mit zwei weiteren auf eine Welle 14 aufgesetzten Lenkern 13 wie Parallellenker wirken, da deren freie Enden gelenkig mit einem Halter 15 verbunden sind, der aus zwei senkrechten Platten 16 und einem diese verbindenden Querträger 17 besteht. Außer durch den Querträger 17 sind die Platten 16 noch durch drei Wellen 18 - 20 miteinander verbunden, wobei der gesamte Halter 15 von den die Wellen 18 und 20 umgreifenden Lenkern 12 und 13 gehalten wird. Auf die Welle 19 ebenso wie auf die Welle 20 sind je zwei mit Abstand zueinander angeordnete gleichlange Hebel 21 und 22 einendig aufgeklemmt, die anderenends mit senkrechten Armen 23 gelenkig verbunden sind, welche mit ihren unteren beiden Enden mit einem Tragprofil 24 verschweißt sind. Dieses Tragprofil trägt einen aus mehreren Stäben 25 bestehenden Preßrechen. Zwei im Abstand zueinander angeordnete Schmelzkleberdüsen 26 sind ebenfalls noch an dem Tragprofil 24 befestigt, die auf nicht dargestellte Weise aus einem Vorratsbehälter über Zulaufleitungen bei Bedarf mit Kleber versorgt werden können. Über die Kolbenzylindereinheit 27, die mit dem Querträger 17 verbunden ist und den auf die Welle 20 aufgeklemmten Schwenkhebel 28 können die Hebel 21 und 22 parallel zueinander verschwenkt werden.The welding and gluing station 3 has a frame with two side parts, of which only the rear side part 6 is indicated. A shaft 7 is mounted in the two side parts 6 and can be rotated by the angle OG by means of a pivot lever 8 attached to it via the piston-cylinder unit 8 '. The piston-cylinder unit 8 'is fastened via a bracket 10 to a crossbar 11 connecting the two side frames 6. On the shaft 7, in addition to the pivot lever 8, two links 12 are placed at a distance from one another, which act as parallel links with two further links 13 placed on a shaft 14, since their free ends are connected in an articulated manner to a holder 15 which consists of two vertical plates 16 and a cross member 17 connecting them. In addition to the cross member 17, the plates 16 are also connected to one another by three shafts 18-20, the entire holder 15 being held by the links 12 and 13 encompassing the shafts 18 and 20. On the shaft 19 as well as on the shaft 20 two equally spaced levers 21 and 22 are clamped at one end, which are articulated at the other ends with vertical arms 23, which are welded with their lower two ends to a support profile 24. This support profile carries a press rake consisting of several bars 25. Two hot-melt adhesive nozzles 26 arranged at a distance from one another are also still attached to the support profile 24, which can be supplied in a manner not shown from a reservoir via supply lines with adhesive if required. The levers 21 and 22 can be pivoted parallel to one another via the piston-cylinder unit 27, which is connected to the cross member 17 and the pivoting lever 28 clamped onto the shaft 20.

Die dem Betrachter zugewandte rechte Maschinenseite ist einfacher aufgebaut. Die Rechenstäbe 25' sind zwar ebenfalls mit einem Tragprofil 24' verbunden und letzteres wiederum mit Armen 23', wobei die Arme 23' an den Hebeln 21' und 22' befestigt sind. Die Hebel 21' und 22' sind mit ihren den Armen 23' abgewandten Enden fest mit zwei Wellen 19' und 20' verbunden, wobei auf die Welle 19' zusätzlich noch der Schwenkhebel 28' geklemmt ist, so daß die Arme 23' und dabei auch die Rechenstäbe 25' aus der mit vollen Linien dargestellten Lage in die mit gestrichelten-Linien dargestellte verschwenkt werden können, und zwar durch die an dem Schwenkhebel 28' angreifende Kolbenzylindereinheit 27'. Die Wellen 19' und 20' sind in zwei senkrechten Platten 16' gelagert, die von einer Quertraverse gehalten werden. Die vorderen Enden der Stäbe 25' sind miteinander durch eine Faltstange 30 verbunden. An der dem Rand 4 zugewandten Seite weist das Tragprofil 24' zwei mit Abstand zueinander angeordnete Schmelzkleberdüsen 26' auf, die identisch sind mit den Düsen 26. Oberhalb des offenen und senkrecht stehenden Sackrandes 4 befindet sich eine Schweißeinrichtung, die aus einer ortsfesten und aus einer gegen die ortsfeste schwenkbaren Schweißbacke 31 bzw. 32 besteht.The right side of the machine facing the viewer has a simpler structure. The rake bars 25 'are also connected to a support profile 24 'and the latter in turn with arms 23', the arms 23 'being attached to the levers 21' and 22 '. The levers 21 'and 22' are fixedly connected with their ends facing away from the arms 23 'to two shafts 19' and 20 ', with the pivot lever 28' additionally being clamped onto the shaft 19 ', so that the arms 23' and thereby the rake rods 25 'can also be pivoted from the position shown in full lines to that shown in dashed lines, specifically by the piston-cylinder unit 27' acting on the pivot lever 28 '. The shafts 19 'and 20' are mounted in two vertical plates 16 ', which are held by a crossbar. The front ends of the bars 25 'are connected to each other by a folding bar 30. On the side facing the edge 4, the support profile 24 'has two hot-melt adhesive nozzles 26' arranged at a distance from one another, which are identical to the nozzles 26. Above the open and vertical sack edge 4 there is a welding device which consists of a fixed and a against the stationary pivotable welding jaw 31 or 32.

Im Betrieb wird der Sack 2 mit senkrecht und straffgehaltenem Rand 4 in Pfeilrichtung A von Zangen 5 gehalten in die Station 3 eingefahren, wobei die Zangen 5 schon so weit abgesenkt sind, daß die obere Sackkante während der nachfolgenden Bearbeitungsgänge ihre Höhenlage beibehält, das heißt, das unterhalb der Zangen 5 befindliche Sackmaterial hängt bis zur Füllguthöhe in der strichpunktiert angedeuteten Weise lappig und faltig herunter. Um während des Einfahrens des Sackes 2 in die Station 3 nirgendwo anzuecken, nehmen die mit Bezug auf die Figur linken Rechenstäbe die mit voll ausgezogenen Linien dargestellte Lage ein. Der Sack 2 bzw. das das Sackförderband 1 wird angehalten, sobald sich der Sackrand 4 vor der festen Schweißbacke 31 befindet. Zu diesem Zeitpunkt ist die Gegenbacke 32 hochgeschwenkt. Danach wird die Kolbenzylindereinheit 8' betätigt, wodurch die Rechenstäbe 25 in die nur angedeutete Position B verschwenkt werden. Sie nehmen dann dieselbe Höhenlage ein, wie die mit voll ausgezogenen Linien dargestellten Rechenstäbe 25'. Sodann werden die Kolbenzylindereinheiten 27 und 27' etwa gleichzeitig betätigt, wobei die Rechenstäbe 25 und 25' von oben auf das Füllgut drücken und dabei die oberhalb des Füllgutes im Sack 2 befindliche Luft auspressen. Im Anschluß daran wird die Gegenbacke 32 gegen die Schweißbacke 31-geschwenkt und dadurch der Sackrand verschweißt.In operation, the sack 2 is moved into the station 3 with the edge 4 held taut and held in the direction of arrow A by tongs 5, the tongs 5 having been lowered so far that the upper edge of the sack maintains its height during the subsequent processing steps, that is to say the sack material located below the tongs 5 hangs down lumpy and wrinkled up to the level of the filling material in the manner indicated by the dot-dash line. In order not to bother anywhere while the bag 2 is being moved into the station 3, the rake bars on the left with reference to the figure assume the position shown in full lines. The sack 2 or that The bag conveyor belt 1 is stopped as soon as the bag edge 4 is in front of the fixed welding jaw 31. At this time, the counter jaw 32 is pivoted up. The piston-cylinder unit 8 'is then actuated, as a result of which the rake bars 25 are pivoted into the position B, which is only indicated. They then assume the same altitude as the rake bars 25 'shown with solid lines. The piston-cylinder units 27 and 27 'are then actuated approximately simultaneously, the rake bars 25 and 25' pressing the filling material from above and thereby squeezing out the air located in the bag 2 above the filling material. Subsequently, the counter jaw 32 against the sealing jaw 31 - pivoted and thereby welded to the bag edge.

Ist dies geschehen, schwenkt die Backe 32 wieder ab, die Kolbenzylindereinheiten 27 und 27' werden drucklos geschältet, bei Bedarf sogar mit geringerem Gegendruck beaufschlagt, um die Rechenstäbe 25 und 25' in einen Gleichgewichtszustand zu bringen, und das Förderband 1 wird eingeschaltet. Während des Abtransportes des Sackes 2 durch das Förderband 1 läuft Schmelzkleber aus den Düsen 26 und 26' aus, so daß einerseits auf die obere linke Sackhälfte und andererseits auf den durch die Stange 30 umgelegten Sackrand 4 je zwei parallel zueinander verlaufende Kleberstreifen gebildet werden. Auf die durch die beiden Düsen 26 gebildeten Klebestreifen wird, wie gesagt, über die Faltstange 30 der obere Sackrand 4 gefaltet, der ganz flach liegt. Die beiden seitlich überstehenden Säckfahnen werden in einer nachfolgenden Station auf die beiden durch die Düsen 26' gebildeten Kleberstreifen nach innen umgelegt und fixiert.When this is done, pivots the jaw 32 again, the K olbenzylindereinheiten 27 and 27 'are depressurized geschältet, even applied as needed with a lower back pressure to the grid bars 25 and 25' to be brought into a state of equilibrium, and the conveyor belt 1 is turned on. During the removal of the sack 2 by the conveyor belt 1, hot melt adhesive runs out of the nozzles 26 and 26 ', so that on the one hand on the upper left half of the sack and on the other hand on the edge of the sack 4 folded over by the rod 30 two parallel adhesive strips are formed. As mentioned, the upper edge of the sack 4, which lies completely flat, is folded over the folding rod 30 onto the adhesive strips formed by the two nozzles 26. In a subsequent station, the two sack lugs protruding laterally are folded over and fixed in place on the two adhesive strips formed by the nozzles 26 '.

Claims (7)

1. Vorrichtung zum Verschließen gefüllter, zumindest teilweise aus thermoplastischem Material bestehender Säcke, vorzugsweise von Großsäcken mit einem Füllvolumen von 1 m3 und mehr, mit einer die gefüllten Säcke in die Schließstation einfahrenden Fördereinrichtung, vorzugsweise einem Förderband, mit beidseits des straff gehaltenen Sackendes auf die Sackfüllung absenkbaren und zueinander parallelen Andrückleisten, die in der abgesenkten Stellung einen Spalt zum Durchtritt des Sackendes zwischen sich begrenzen, und mit einer oberhalb der Andrückleiste vorgesehenen Verschließeinrichtung,
dadurch gekennzeichnet,
daß die Verschließeinrichtung aus zwischen den Spreizeinrichtungen (5) und den Andrückleisten (25, 25') an das Sackende (4) angreifenden und beidseits von diesem angeordneten Schweißleisten (31, 32) besteht, daß die in Förderrichtung hintere Andrückleiste (25) mit gegen die auf die Sackfüllung angedrückte obere Sackwandung gerichteten Klebstoffdüsen (26) versehen ist und daß die in Förderrichtung vordere Andrückleiste (25') eine dem Sackende (4) zugewandte Faltkante oder -stange (30) besitzt, die dieses nach dem Anfahren des Förderers (1) nach dem Bilden der Kopfschweißnaht und öffnen der Schweißbacken auf die mit Leimstreifen versehene flachgedrückte nachlaufende Hälfte der Sackoberseite umlegt und andrückt.1. Device for closing filled sacks, at least partially consisting of thermoplastic material, preferably large sacks with a filling volume of 1 m 3 and more, with a conveyor device, preferably a conveyor belt, driving the filled sacks into the closing station, with both sides of the taut end of the sack, which can be lowered onto the sack filling and parallel to each other, pressure bars, which are in the lowered position delimit a gap for the passage of the end of the bag between them, and with a closing device provided above the pressure bar,
characterized,
that the closing device consists of between the spreading devices (5) and the pressure bars (25, 25 ') engaging the bag end (4) and arranged on both sides of the sealing bars (31, 32), that the rear pressure bar (25) in the conveying direction with the glue nozzles (26) which are pressed onto the bag filling and which are directed towards the bag filling are provided and that the front pressure bar (25 ') in the conveying direction has a folding edge or bar (30) which faces the bag end (4) and which this after the conveyor (1 ) after forming the head weld and opening the welding jaws on the flattened trailing half of the top of the sack with glue strips and pressing. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die in Förderrichtung (A) vordere Andrückleiste (251) mit gegen das umgelegte Sackende (4) gerichteten klebstoffdüsen (26') versehen ist.2. Device according to claim 1, characterized in that the pressure bar (25 1 ) in the conveying direction (A) is provided with adhesive nozzles (26 ') directed against the folded end of the bag (4). 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Andrückleisten (25, 25') aus rostartig angeordneten Stäben bestehen.3. Device according to claim 1 or 2, characterized in that the pressure strips (25, 25 ') consist of bars arranged in a rust-like manner. 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß jede Andrückleiste (25, 25') plattenförmig ausgebildet ist und etwa die Hälfte der Sackoberseite abdeckt.4. Device according to one of claims 1 to 3, characterized in that each pressure bar (25, 25 ') is plate-shaped and covers approximately half of the top of the bag. 5. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Andrückleisten (25, 25') mit vertikalen Trägern (23, 23') versehen sind, die über Parallellenker (21, 22, 21', 22') mit dem Gestell verbunden sind, so daß sie in einer horizontalen Ebene parallel zu sich selbst auf die Sackfüllung beidseits des straff gehaltenen Sackendes (4) absenkbar sind.5. Device according to one of claims 1 to 3, characterized in that the pressure strips (25, 25 ') are provided with vertical supports (23, 23') which have parallel links (21, 22, 21 ', 22') are connected to the frame so that they can be lowered in a horizontal plane parallel to themselves onto the bag filling on both sides of the taut end of the bag (4). 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Parallellenker (21, 22) der in Förderrichtung hinteren Andrückleiste (25) an die vertikale Koppel (16) von im Gestell gelagerten Parallellenkern (12, 13) auf derselben Seite wie diese angelenkt sind, so daß sich die Andrückleiste (25) über die Oberkante des von mit dem Förderband (1) mitbewegten Spreizeinrichtungen (5) gehaltenen oberen Randes des Sackendes (4) heben läßt.6. The device according to claim 5, characterized in that the parallel links (21, 22) of the rear pressure bar in the conveying direction (25) to the vertical coupling (16) of parallel bars in the frame (12, 13) are articulated on the same side as these , so that the pressure bar (25) can be lifted above the upper edge of the upper edge of the bag end (4) held by spreading devices (5) moved with the conveyor belt (1). 7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß jeweils einer der Parallellenker (12, 21, 22') auf einer Welle (7, 20, 19') befestigt ist, die zu deren Verschwenken mit einem Hebel (8,28, 28') verbunden ist, an den eine Druckmittelkolbenzylindereinheit (81, 27, 27') angelenkt ist.7. Device according to one of the preceding claims, characterized in that in each case one of the parallel links (12, 21, 22 ') on a shaft (7, 20, 19') is attached, which for pivoting with a lever (8,28 , 28 ') is connected to which a pressure medium piston cylinder unit (8 1 , 27, 27') is articulated.
EP85103921A 1984-04-26 1985-04-01 Device for closing filled bags Expired EP0161449B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85103921T ATE29007T1 (en) 1984-04-26 1985-04-01 DEVICE FOR CLOSING FILLED BAGS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3415604 1984-04-26
DE3415604A DE3415604C2 (en) 1984-04-26 1984-04-26 Device for closing filled sacks

Publications (2)

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EP0161449A1 true EP0161449A1 (en) 1985-11-21
EP0161449B1 EP0161449B1 (en) 1987-08-19

Family

ID=6234446

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EP85103921A Expired EP0161449B1 (en) 1984-04-26 1985-04-01 Device for closing filled bags

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US (1) US4574560A (en)
EP (1) EP0161449B1 (en)
AT (1) ATE29007T1 (en)
CA (1) CA1254867A (en)
DE (1) DE3415604C2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4872303A (en) * 1988-02-25 1989-10-10 Mid America Machine Corp. Bag top forming method and apparatus
DE3818910A1 (en) * 1988-06-03 1989-12-14 Haver & Boecker DEVICE FOR FILLING AND SEALING OPEN BAGS
CA2204309A1 (en) * 1997-05-02 1998-11-02 Salvatore Nicastro Bag filling and sealing apparatus
CN108891683A (en) * 2018-07-03 2018-11-27 合肥亚卡普机械科技有限公司 A kind of sealing device for food packaging processing

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US3115736A (en) * 1961-04-24 1963-12-31 Axel F Peterson Bag closing apparatus
DE1265643B (en) * 1965-08-24 1968-04-04 Mahlkuch Greif Werk Ernst Device for folding over the top of filled bags
DE1931100A1 (en) * 1969-06-19 1971-01-07 Savannah Sugar Refining Corp Packing machine
DE3138407A1 (en) * 1981-09-26 1983-04-14 A.Beeck Maschinenfabrik, 2900 Oldenburg Method and device for folding the edge regions of folding bags

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DE1252116B (en) * 1967-10-12 Fr Hesser, Maschinenfabnk-Ak tiengesellschaft, Stuttgart-Bad Cannstatt Device for the production of Klebeverbmdungen on closure parts of bags or the like
DE1923332U (en) * 1964-08-19 1965-09-09 Holstein & Kappert Maschf DEVICE FOR WELDING PROJECTING PACKAGING PARTS TO FILLED PACKAGES.
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Publication number Priority date Publication date Assignee Title
US3115736A (en) * 1961-04-24 1963-12-31 Axel F Peterson Bag closing apparatus
DE1265643B (en) * 1965-08-24 1968-04-04 Mahlkuch Greif Werk Ernst Device for folding over the top of filled bags
DE1931100A1 (en) * 1969-06-19 1971-01-07 Savannah Sugar Refining Corp Packing machine
DE3138407A1 (en) * 1981-09-26 1983-04-14 A.Beeck Maschinenfabrik, 2900 Oldenburg Method and device for folding the edge regions of folding bags

Also Published As

Publication number Publication date
ATE29007T1 (en) 1987-09-15
CA1254867A (en) 1989-05-30
DE3415604C2 (en) 1986-03-13
US4574560A (en) 1986-03-11
EP0161449B1 (en) 1987-08-19
DE3415604A1 (en) 1985-11-07

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