EP1819596B1 - Machine for forming, filling and closing bags with a bag lifting device - Google Patents

Machine for forming, filling and closing bags with a bag lifting device Download PDF

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Publication number
EP1819596B1
EP1819596B1 EP05798034A EP05798034A EP1819596B1 EP 1819596 B1 EP1819596 B1 EP 1819596B1 EP 05798034 A EP05798034 A EP 05798034A EP 05798034 A EP05798034 A EP 05798034A EP 1819596 B1 EP1819596 B1 EP 1819596B1
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EP
European Patent Office
Prior art keywords
sack
filling
machine according
filled
discharge opening
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EP05798034A
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German (de)
French (fr)
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EP1819596A1 (en
Inventor
Thomas Knoke
Uwe Köhn
Rüdiger Grosse-Heitmeyer
Thomas Hawighorst
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Priority to PL05798034T priority Critical patent/PL1819596T3/en
Publication of EP1819596A1 publication Critical patent/EP1819596A1/en
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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
    • B65B9/10—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
    • 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
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/02—Machines characterised by the incorporation of means for making the containers or receptacles
    • 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
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/30—Devices or methods for controlling or determining the quantity or quality or the material fed or filled
    • B65B1/36—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by volumetric devices or methods
    • 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
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
    • B65B43/46—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation using grippers
    • B65B43/465—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation using grippers for 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
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
    • B65B43/54—Means for supporting containers or receptacles during the filling operation
    • B65B43/56—Means for supporting containers or receptacles during the filling operation movable stepwise to position container or receptacle for the reception of successive increments of contents
    • B65B43/58—Means for supporting containers or receptacles during the filling operation movable stepwise to position container or receptacle for the reception of successive increments of contents vertically movable
    • 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
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/04—Methods of, or means for, filling the material into the containers or receptacles
    • B65B1/10—Methods of, or means for, filling the material into the containers or receptacles by rotary feeders
    • B65B1/12—Methods of, or means for, filling the material into the containers or receptacles by rotary feeders of screw type

Definitions

  • the invention relates to a method for producing, filling and sealing of plastic bags with dusty or granular bulk material, as well as for closing the filled bags.
  • Such a device is for example from the DE 93 01 355 U known.
  • a device for producing, filling and closing unilaterally open preferably provided with gusseted bags of thermoplastic described in which a first welding and separation station to form the bag with bottom seam, a filling station and a second welding station for closing the bag available.
  • these filling machines are classified in the FFS (Form Fill and Seal) category.
  • the filling of dusty goods according to the known filling method described usually leads to a significantly inflated product volume or to a significant reduction in bulk density, since the product accumulates heavily in the free fall with air. This, in turn, leads to bottling the product initially much more packaging material is needed. In addition, the air must be able to escape from the bag again, otherwise it can not be stacked or stored.
  • the EP 1 459 981 A1 suggests, therefore, to introduce the filler neck of a metering of an FFS machine in the opening of a bag.
  • the object of the present invention is therefore to propose an apparatus and a method which further reduce the formation of mist or dust by filling.
  • a development device of an FFS machine winds a plastic hose made of a thermoplastic material, which is pronounced as a gusseted hose.
  • the transverse cutting direction which separates the tube transversely to its main axis of symmetry and produces pieces of tubing, often simultaneously forms the sack bottom of the bags resulting from the tube pieces by means of a transverse cutting seam.
  • transverse cutting with a knife in conjunction with transverse welding is more common.
  • the resulting in the separation and bottoming bags are transported by transport devices in a suitable manner by the machine, the transport devices usually include gripper pairs.
  • the bag is filled in a filling station.
  • the metering member for filling the bag with filling material comprises a drop tube and a screw conveyor.
  • the associated FFS machines thus include per filling station usually only one filling tube and a screw conveyor and of course other device features that allow the filling of the bag. These include, for example, a funnel.
  • the stroke that the bag makes in the filling station will be considerable. It is often more than half the length of the bag. Very low drop heights of the contents on the bag bottom are desirable in order to minimize the formation of mist.
  • the unavoidable drop height at the beginning of the filling process can be reduced below 20 cm.
  • the lifting movement of the bag is likely to be predominantly vertical, and the bag is pulled downright over the generally cylindrical shaped downpipe. In this case, the dosing can remain stationary, that is, in particular, not be designed to perform longer vertical movements.
  • such a metering device advantageously comprises only a drop tube and a screw, as well as other device objects such as a funnel.
  • a bag bottom support device is particularly advantageous, since during the filling of the bag, even at low drop heights it may be necessary to support the floor which has just been welded.
  • the bag bottom support device may comprise movable support surfaces in the manner of lifting platforms. Such support surfaces can be driven along with the entire lifting movement of the bag.
  • Another way constructive simply to provide such bag bottom support devices is located in pivotal support surfaces, for example, along a horizontal axis can be folded away when the bag is lowered again after the filling process.
  • a connecting piece which engages around at least parts of the dosing or its cylindrical downpipe and which is retractable during the filling in the space between the dosing and the bag wall , This retraction can be done along the downpipe of the metering.
  • the filler neck can also be so pronounced that it contains, for example, along its outside inflatable elements which close the gap between the bag wall and the filler neck.
  • the same can also apply to its inner wall, in which case the gap between the nozzle itself and the metering device would have to be closed.
  • the bag would be closed in its filling with respect to the outside atmosphere, with only the downpipe would reach into the bag inside.
  • suction at the metering is not only - as described below - sucked air from the product. There is also an influx of air from the outside, so that it comes to a directional flow. It is also advantageous if the air is sucked in connection with the connection piece between the connection piece and the bag wall. As a result, especially the bag wall parts are kept free at the height of the connecting piece of filling material. The entire measures for the maintenance of the bag wall material of filling material are needed if this material is to serve as a closure of the bag by a weld. In FFS machines, a continuous determination of the bag weight during filling is frequently made.
  • such a check of the bag weight is preferably carried out via a bag weight measurement on the bag lifting device or the bag bottom support device.
  • These two elements of the machine can also be provided with means for generating vibrations. These are used in FFS machines to further reduce the air content in the filling material.
  • the material outlet opening of the metering element is below the filling level of the bag. This can be done particularly well with a device according to the invention. In the spacing of the material outlet opening of the metering and the level Material and filling rate specific target values must be observed in order to minimize fogging of the contents.
  • control device which is the most diverse physical values, which are suitable for determining the level in the bag, communicated.
  • these values may include the instant weight of the bag.
  • Other methods could determine the fill level of the bag with suitable jets.
  • the control device could then make a continuous lowering of the position of the same depending on the level of the bag to be determined, so that the Gregutaustrittsö réelle the dosing during the entire filling of the bag is always a desired distance below the level of the bag.
  • the product outlet opening could also be above the fill level. This can be realized with the same measures / device features. Another easier way to maintain such a desired distance is the lowering of the bag as a function of time.
  • the closed at the lower end empty bag 11 is a horizontally displaceable transport, such as a gripper 18, passed and transported to the filling station.
  • the filling station takes over a further transport 4, which consists of 3,4,5, the bag section.
  • the empty bag is now opened with a suction system 16.
  • the gripper 4 is moved in the Z direction.
  • the connecting piece of the transport system 3 is moved into the bag and protects the sack inner surfaces from contamination by possible product adherence to the metering tube 2,21.
  • the opened bag is pulled by the transport system 3,4,5 over the metering tube 2,21,22 until the lower end of the bag is approximately at the level of Gregutaustrittsö réelle 31.
  • the bag bottom support device 32,33,34 is driven under the sack floor.
  • the closure tube 21 is lifted and releases the product outlet opening 31.
  • the product / bulk material 24 is filled in the bag.
  • the transport system 3,4,5 lowers the bag in such a way that the product outlet opening 31 is always below the filling level. However, even before the end of the metering of the product / bulk material 24, the product outlet opening 31 should be at least once above the filling level.
  • the closure tube 21 is lowered and closes the product outlet opening 31.
  • the connection piece is pulled out of the bag.
  • the gripper 4 of the transport system 3,4,5 is now moved counter to the Z-direction and pulls the opening area at the upper edge 25 of the previously opened bag tight.
  • Another transport means 14 takes over the filled bag 8.
  • the closing device 14 By means of the closing device 14, the upper edge of the bag 25 is now closed. If necessary, it can be sucked out by the filter 22 integrated in the closure tube 21 together with the metering process. The required vacuum is introduced via the pipe 23.
  • the integration of the filter 22 in the closure tube allows a very compact design, which makes it possible to fill even relatively small bags.
  • the suction of the air leads to a certain extent to a compression of the bulk material. As a result, a sack size appropriate to the product quantity can be selected.
  • vibration generators / beaters 29 This effect of product compaction can be enhanced by the additional use of vibration generators / beaters 29.
  • the vibrations are transmitted from the metering tube 2,21,22 to the filling material 24, in which then takes place a compression.
  • Another advantage of the "vibrating metering tube" 2,21,22 is that the formation of product adherence to the metering tube 2,21,22 thereby largely avoided.
  • the vibrator 29 could also be arranged on the "Sackêtunterstützungsvortechnisch" 34!
  • Another function of the extraction may be to specify a corresponding flow direction 28 in order to keep the "fog" (product dust) occurring in particularly light and dusty products from the sack inner surfaces in the area of the later head weld seam. For this, it must be ensured that the air can enter at the circumference of the connecting piece or between the connection piece and the metering unit.
  • a particularly advantageous embodiment of the carriage is to store the frame 5 together with the neck 3, transport 4 and the absorption 16 on sensors.
  • the sensors send their signal to a weighing electronics, which ultimately controls the dosing process.
  • Another possibility of product weighing which can be used advantageously in the entire FFS area is to mount the entire metering element, consisting of 1,2,21, on sensors 29.
  • the product feed located above the metering device 1 would then first fill the metering device 1 mounted on the sensors with an exact quantity of product 24.
  • the duration of the dosage is controlled by an electronics connected to the sensors.
  • the pre-weighed amount of product can now be delivered through the metering at high speed in the bag.
  • the metering system can preferably consist of a vertically arranged screw conveyor with direct metering into the bag.
  • the bulk material can also be pumped into the bag by means of a pressure system.
  • the bulk material level in the hopper 1 is exposed to an overpressure.
  • This method requires a Untertikbehellung due to the required back pressure.
  • the air introduced from the bulk material in this case can be sucked out of the bag via the filter 22 integrated in the closure tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Basic Packing Technique (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Supply Of Fluid Materials To The Packaging Location (AREA)

Abstract

A machine for forming, filling, and sealing sacks has an unwinding device for a plastic tube, a cross-cutting device that cuts the tube perpendicularly to its principal axis of symmetry and creates tubular pieces in the process, a bottom forming means for forming a sack bottom at one end of the tubular piece, transport equipment to transport the resulting sacks through the machine, a filling station with a feeding element for filling the product in the sack, means of reducing the distance between the product discharge opening of the feed element and the bottom of the sack to be filled, and sealing means to seal the filled sack. The means of reducing the distance is a sack lifting device with which the sack can be lifted in the filling station such that an upper edge of the sack is located above the product discharge opening of the feed element.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen, Befüllen und Verschließen von Kunststoffsäcken mit staubigem oder auch körnigem Schüttgut, sowie zum Verschließen der befüllten Säcke.The invention relates to a method for producing, filling and sealing of plastic bags with dusty or granular bulk material, as well as for closing the filled bags.

Eine derartige Vorrichtung ist beispielsweise aus der DE 93 01 355 U bekannt. Hier ist bereits eine Vorrichtung zur Herstellung, Befüllung und zum Verschließen einseitig offener, vorzugsweise mit Seitenfalten versehener Säcke aus thermoplastischem Kunststoff beschrieben, bei der eine erste Schweiß- und Trennstation zur Bildung des Sackes mit Bodennaht, eine Füllstation und eine zweite Schweißstation zum Verschließen des Sackes vorhanden sind. Im Allgemeinen werden diese Abfüllmaschinen in die FFS(Form Fill and Seal)-Kategorie eingeordnet.Such a device is for example from the DE 93 01 355 U known. Here is already a device for producing, filling and closing unilaterally open, preferably provided with gusseted bags of thermoplastic described in which a first welding and separation station to form the bag with bottom seam, a filling station and a second welding station for closing the bag available. Generally, these filling machines are classified in the FFS (Form Fill and Seal) category.

Bei der Abfüllung staubiger Schüttgüter auf Maschinen der genannten Kategorie über Schwerkraft bzw. durch den freien Fall muss die vom Produkt verdrängte, staubige Luft aus dem Sack entweichen können. Bei dem Entweichen der Luft kommt es oft zu Kontaminationen in den oberen Randbereichen des Sackes. Bedingt durch die Kontamination mit Produktstaub kann der Sack mittels der bei dieser Art Verpackung im Allgemeinen üblichen Verschweißung nicht sicher verschlossen werden. Darüber hinaus belastet der Staub die Umwelt und muss gesondert abgesaugt werden.When filling dusty bulk materials on machines of the named category by gravity or by free fall, the dusty air displaced by the product must be able to escape from the bag. The escape of air often leads to contamination in the upper edge areas of the bag. Due to the contamination with product dust, the bag can not be securely closed by means of the welding which is generally customary in this type of packaging. In addition, the dust pollutes the environment and must be separately extracted.

Ferner führt die Abfüllung staubiger Güter nach dem beschriebenen bekannten Abfüllverfahren in der Regel zu einem deutlich überhöhten Produktvolumen bzw. zu einer deutlichen Reduzierung des Schüttgewichtes, da sich das Produkt durch den freien Fall stark mit Luft anreichert. Dieses wiederum führt dazu, dass zur Abfüllung des Produkts zunächst deutlich mehr Verpackungsmaterial gebraucht wird. Darüber hinaus muss die Luft auch wieder aus dem Sack entweichen können, da er sich sonst nicht stapeln bzw. lagern lässt.Furthermore, the filling of dusty goods according to the known filling method described usually leads to a significantly inflated product volume or to a significant reduction in bulk density, since the product accumulates heavily in the free fall with air. This, in turn, leads to bottling the product initially much more packaging material is needed. In addition, the air must be able to escape from the bag again, otherwise it can not be stacked or stored.

Da das Entweichen der Luft in der Regel sehr lange dauert, kann die Entlüftung nicht bereits vor dem Verschließen des Sackes stattfinden. Der Sack muss daher eine Perforation aufweisen. Dieses belastet zusätzlich die Umwelt, da durch die Perforation der Verpackung die feinkörnigen, staubigen Produkte zum Teil nach außen gelangen können.Since the escape of air usually takes a long time, the venting can not take place before closing the bag. The bag must therefore have a perforation. This additionally pollutes the environment, as the fine-grained, dusty products can partially escape through the perforation of the packaging.

Mit der Zeit nimmt das Volumen des Schüttgutes wieder ab. Die Sackverpackung ist nun, gemessen am verpackten Schüttgutvolumen, deutlich zu groß. Solcherart befüllte Säcke lassen sich nur schlecht auf Paletten stapeln, da sie zu instabil sind.Over time, the volume of bulk material decreases again. The sack packaging is now, compared to the packaged bulk material volume, significantly too large. Such filled sacks are difficult to stack on pallets because they are too unstable.

Die EP 1 459 981 A1 schlägt daher vor, den Einfüllstutzen eines Dosierorgans einer FFS-Maschine in die Öffnung eines Sackes einzuführen.The EP 1 459 981 A1 suggests, therefore, to introduce the filler neck of a metering of an FFS machine in the opening of a bag.

Eine solche Vorrichtung ist jedoch konstruktiv aufwendig.However, such a device is structurally complex.

Die Aufgabe der vorliegenden Erfindung besteht daher darin, eine Vorrichtung und ein Verfahren vorzuschlagen, die die Nebel- bzw. Staubbildung durch Füllgut weiter reduzieren.The object of the present invention is therefore to propose an apparatus and a method which further reduce the formation of mist or dust by filling.

Die Aufgabe wird durch den Anspruch 1 und den Anspruch 16 gelöst.The object is solved by the claim 1 and the claim 16.

Zum Oberbegriff des Hauptanspruches ist hierbei folgendes anzumerken: In der Regel wickelt eine Abwicklungsvorrichtung einer FFS-Maschine einen Kunststoffschlauch aus einem thermoplastischen Material ab, welcher als Seitenfaltenschlauch ausgeprägt ist. Die Quertrennrichtung, die den Schlauch quer zu seiner Hauptsymmetrieachse trennt und Schlauchstücke erzeugt, bildet oft auch gleichzeitig den Sackboden der aus den Schlauchstücken entstehenden Säcke durch eine Quertrennschweißnaht. Im FFS-Bereich ist jedoch Querschneiden mit einem Messer in Verbindung mit Querschweißen gebräuchlicher. Die bei der Trennung und Bodenbildung entstandenen Säcke werden durch Transportvorrichtungen in geeigneter Weise durch die Maschine transportiert, wobei die Transportvorrichtungen in der Regel Greiferpaare umfassen. In einer Befüllstation wird der Sack befüllt. Hierbel ist es typisch, dass das Dosierorgan zur Befüllung des Sackes mit Befüllgut ein Fallrohr und eine Förderschnecke umfasst. Denkbar ist jedoch auch, die Schwerkraft (freier Fall) oder die Wirkung eines Überdrucks auszunutzen. Im Moment wird in solchen Befüllstationen jeweils nur ein Sack gleichzeitig abgefüllt; die zugehörigen FFS-Maschinen umfassen damit pro Befüllstation in der Regel nur ein Befüllrohr und eine Förderschnecke sowie natürlich andere Vorrichtungsmerkmale, die die Befüllung des Sackes ermöglichen. Zu diesen gehört beispielsweise ein Trichter.For the preamble of the main claim, the following should be noted: As a rule, a development device of an FFS machine winds a plastic hose made of a thermoplastic material, which is pronounced as a gusseted hose. The transverse cutting direction, which separates the tube transversely to its main axis of symmetry and produces pieces of tubing, often simultaneously forms the sack bottom of the bags resulting from the tube pieces by means of a transverse cutting seam. In the FFS area, however, transverse cutting with a knife in conjunction with transverse welding is more common. The resulting in the separation and bottoming bags are transported by transport devices in a suitable manner by the machine, the transport devices usually include gripper pairs. The bag is filled in a filling station. It is typical for Hierbel that the metering member for filling the bag with filling material comprises a drop tube and a screw conveyor. However, it is also conceivable to exploit gravity (free fall) or the effect of overpressure. At the moment, only one sack is filled at the same time in such filling stations; the associated FFS machines thus include per filling station usually only one filling tube and a screw conveyor and of course other device features that allow the filling of the bag. These include, for example, a funnel.

Die oben angeführte Druckschrift EP 1 459 981 A1 schlägt vor, Staubbildung zu minimieren, indem der Abstand zwischen der Füllgutaustrittsöffnung und dem Boden des zu befüllenden Sackes in der Befüllstation beziehungsweise vor der Befüllung reduziert wird. Hierzu schlägt die genannte Druckschrift vor, den Füllstutzen in vertikaler Richtung in den Sack einzuführen. Bei FFS-Maschinen wird in der Regel anschließend an den Befüllvorgang ein Verschließen des Sackes mit einer Querschweißung vorgenommen. Konstruktiv einfacher ist es, eine Vorrichtung vorzusehen, die den Abstand zwischen der Füllgutaustrittsöffnung und dem Boden des zu befüllenden Sackes durch ein Anheben des Sackes in der Befüllstation, das heißt unmittelbar vor dem Beginn des Befüllvorganges reduziert. Damit sind andere Höhenveränderungen durch den Transport des Sackes oder der Schlauchfollenstücke nicht Gegenstand der vorliegenden Erfindung. In der Regel wird der Hub, den der Sack in der Befüllstation macht, erheblich sein. Er dürfte oft bei über der Hälfte der Länge des Sackes liegen. Wünschenswert sind sehr geringe Fallhöhen des Füllgutes auf den Sackboden, um die Nebelbildung zu minimieren. Die unumgehbare Fallhöhe zu Beginn des Füllvorganges kann dabei unter 20 cm reduziert werden. Die Anhebbewegung des Sackes dürfte hierbei vorwiegend vertikal erfolgen, und der Sack wird regelrecht über das in der Regel zylinderförmig ausgeprägte Fallrohr gezogen. Hierbei kann das Dosierorgan ortsfest verbleiben, das heißt insbesondere nicht zur Ausführung längerer Vertikalbewegungen beschaffen sein. Wie bereits erwähnt umfasst ein solches Dosierorgan vorteilhafterweise lediglich ein Fallrohr und eine Schnecke sowie andere Vorrichtungsgegenstände wie einen Trichter. Zur Fortbildung der erfindungsgemäßen Vorrichtung ist eine Sackbodenunterstützungsvorrichtung besonders vorteilhaft, da bei der Befüllung des Sackes auch bei geringen Fallhöhen eine Stützung des gerade geschweißten Bodens vonnöten sein kann. Hierbei kann die Sackbodenunterstützungsvorrichtung in der Art von Hebebühnen verfahrbare Stützflächen umfassen. Solche Stützflächen können mit der gesamten Hubbewegung des Sackes mitgefahren werden. Eine andere Möglichkeit, konstruktiv einfach solche Sackbodenunterstützungsvorrichtungen bereit zu stellen, liegt in schwenkbaren Stützflächen, die beispielsweise entlang einer horizontalen Achse weggeklappt werden können, wenn der Sack nach dem Befüllvorgang wieder abgesenkt wird. In weiterer Ausprägung von FFS-Maschinen, und hier insbesondere der vorliegenden Erfindung, ist es vorteilhaft, einen Anschlussstutzen vorzusehen, welcher zumindest um Teile des Dosierorgans beziehungsweise seines zylinderförmigen Fallrohres herumgreift und welcher während des Befüllvorganges in den Zwischenraum zwischen dem Dosierorgan und der Sackwandung einfahrbar ist. Dieser Einfahrvorgang kann entlang dem Fallrohr des Dosierorgans erfolgen. Der Abfüllstutzen kann auch so ausgeprägt sein, dass er beispielsweise entlang seiner Außenseite aufblasbare Elemente enthält, die den Zwischenraum zwischen der Sackwandung und dem Einfüllstutzen verschließen. Gleiches kann auch für seine Innenwandung gelten, wobei hier dann der Zwischenraum zwischen dem Stutzen selbst und dem Dosierorgan zu schließen wäre. Hierdurch wäre der Sack bei seiner Befüllung verschließbar gegenüber der Außenatmosphäre, wobei lediglich das Fallrohr in den Sack hinein greifen würde. Durch ein beim FFS-Verfahren vorteilhaftes Absaugen am Dosierorgan wird nicht nur - wie weiter unten beschrieben - Luft aus dem Produkt gesaugt. Es kommt auch zu einem Einströmen von Luft von außen, so dass es dadurch zu einer gerichteten Strömung kommt. Vorteilhaft ist es auch, wenn die Luft in Verbindung mit dem Anschlussstutzen zwischen Anschlussstutzen und Sackwandung hindurch gesogen wird. Hierdurch werden besonders die Sackwandungsteile auf der Höhe des Anschlussstutzens von Befüllmaterial frei gehalten. Die ganzen Maßnahmen zur Reinerhaltung des Sackwandungsmaterials von Befüllmaterial sind vonnöten, wenn dieses Material durch eine Schweißung als Verschluss des Sackes dienen soll. In FFS-Maschinen wird des öfteren eine kontinuierliche Bestimmung des Sackgewichtes während der Befüllung vorgenommen. Bei der vorliegenden Vorrichtung ist eine solche Kontrolle des Sackgewichtes vorzugsweise über eine Sackgewichtsmessung an der Sackhebevorrichtung oder der Sackbodenunterstützungsvorrichtung vorzunehmen. Diese beiden Elemente der Maschine können auch mit Mitteln zur Erzeugung von Vibrationen versehen werden. Diese werden in FFS-Maschinen eingesetzt, um den Luftanteil im Befüllmaterial weiter zu reduzieren. Während des Befüllvorganges ist es allgemein im FFS-Prozess vorteilhaft, wenn die Materialaustrittsöffnung des Dosierorgans sich unterhalb des Füllstandes des Sackes befindet. Das lässt sich mit einer erfindungsgemäßen Vorrichtung besonders gut bewerkstelligen. Bei der Beabstandung der Materialaustrittsöffnung des Dosierorgans und dem Füllstand sind material- und abfüllgeschwindigkeitsspezifische Sollwerte einzuhalten, um die Nebelbildung bei dem Füllgut zu minimieren. Es erscheint vorteilhaft, eine Steuervorrichtung vorzusehen, welcher die verschiedensten physikalischen Werte, welche sich zur Ermittlung des Füllstandes im Sack eignen, mitgeteilt werden. Zu diesen Werten kann natürlich das augenblickliche Gewicht des Sackes gehören. Es erscheint jedoch auch möglich, aus dem Volumenfluss des Füllmaterials heraus den Füllstand des Sackes zu errechnen. Andere Verfahren könnten mit geeigneten Strahlen den Füllstand des Sackes ermitteln. Die Steuervorrichtung könnte dann in Abhängigkeit von dem zu ermittelnden Füllstand des Sackes eine kontinuierliche Absenkung der Position desselben vornehmen, so dass die Füllgutaustrittsöffnung des Dosiervorgangs während des gesamten Füllvorgangs des Sackes stets einen Sollabstand unter dem Füllstand des Sackes liegt. Bei anderen Füllmaterialien konnte jedoch auch die Füllgutaustrittsöffnung über dem Füllstand liegen. Dieses kann mit denselben Maßnahmen/Vorrichtungsmerkmalen realisiert werden. Eine weitere einfachere Möglichkeit zur Aufrechterhaltung eines solchen Sollabstandes besteht in der Absenkung des Sackes als Funktion der Zeit.The above cited document EP 1 459 981 A1 proposes to minimize dust formation by the distance between the Füllgutaustrittsöffnung and the bottom of the bag to be filled in the filling or before filling is reduced. For this purpose, said document proposes to introduce the filler neck in the vertical direction in the bag. In the case of FFS machines, the bag is usually sealed off with a transverse weld after the filling process. It is structurally easier to provide a device which reduces the distance between the Füllgutaustrittsöffnung and the bottom of the bag to be filled by lifting the bag in the filling station, that is immediately before the start of the filling. Thus, other changes in height by the transport of the bag or Schlauchfollenstücke not subject of the present invention. As a rule, the stroke that the bag makes in the filling station will be considerable. It is often more than half the length of the bag. Very low drop heights of the contents on the bag bottom are desirable in order to minimize the formation of mist. The unavoidable drop height at the beginning of the filling process can be reduced below 20 cm. The lifting movement of the bag is likely to be predominantly vertical, and the bag is pulled downright over the generally cylindrical shaped downpipe. In this case, the dosing can remain stationary, that is, in particular, not be designed to perform longer vertical movements. As already mentioned, such a metering device advantageously comprises only a drop tube and a screw, as well as other device objects such as a funnel. For further development of the device according to the invention, a bag bottom support device is particularly advantageous, since during the filling of the bag, even at low drop heights it may be necessary to support the floor which has just been welded. Here, the bag bottom support device may comprise movable support surfaces in the manner of lifting platforms. Such support surfaces can be driven along with the entire lifting movement of the bag. Another way constructive simply to provide such bag bottom support devices is located in pivotal support surfaces, for example, along a horizontal axis can be folded away when the bag is lowered again after the filling process. In a further embodiment of FFS machines, and in particular the present invention, it is advantageous to provide a connecting piece which engages around at least parts of the dosing or its cylindrical downpipe and which is retractable during the filling in the space between the dosing and the bag wall , This retraction can be done along the downpipe of the metering. The filler neck can also be so pronounced that it contains, for example, along its outside inflatable elements which close the gap between the bag wall and the filler neck. The same can also apply to its inner wall, in which case the gap between the nozzle itself and the metering device would have to be closed. As a result, the bag would be closed in its filling with respect to the outside atmosphere, with only the downpipe would reach into the bag inside. By an advantageous in the FFS process suction at the metering is not only - as described below - sucked air from the product. There is also an influx of air from the outside, so that it comes to a directional flow. It is also advantageous if the air is sucked in connection with the connection piece between the connection piece and the bag wall. As a result, especially the bag wall parts are kept free at the height of the connecting piece of filling material. The entire measures for the maintenance of the bag wall material of filling material are needed if this material is to serve as a closure of the bag by a weld. In FFS machines, a continuous determination of the bag weight during filling is frequently made. In the present device, such a check of the bag weight is preferably carried out via a bag weight measurement on the bag lifting device or the bag bottom support device. These two elements of the machine can also be provided with means for generating vibrations. These are used in FFS machines to further reduce the air content in the filling material. During the filling process, it is generally advantageous in the FFS process if the material outlet opening of the metering element is below the filling level of the bag. This can be done particularly well with a device according to the invention. In the spacing of the material outlet opening of the metering and the level Material and filling rate specific target values must be observed in order to minimize fogging of the contents. It appears advantageous to provide a control device, which is the most diverse physical values, which are suitable for determining the level in the bag, communicated. Of course, these values may include the instant weight of the bag. However, it also seems possible to calculate the fill level of the bag from the volume flow of the filling material. Other methods could determine the fill level of the bag with suitable jets. The control device could then make a continuous lowering of the position of the same depending on the level of the bag to be determined, so that the Füllgutaustrittsöffnung the dosing during the entire filling of the bag is always a desired distance below the level of the bag. For other fillers, however, the product outlet opening could also be above the fill level. This can be realized with the same measures / device features. Another easier way to maintain such a desired distance is the lowering of the bag as a function of time.

Weitere Details und Ausführungsbeispiele der vorliegenden Erfindung sind den Unteransprüchen und der gegenständlichen Beschreibung zu entnehmen.Further details and exemplary embodiments of the present invention can be taken from the subclaims and the description of the subject matter.

Eine Schlauchfolienbahn 15, vorzugsweise mit eingelegten Seitenfalten, wird zunächst von einem Vorzugrollensystem 9 in ein horizontal bewegliches Transportmittel, beispielsweise ein Greiferpaar 18 gefördert.A tubular film web 15, preferably with inserted gussets, is first conveyed by a preferred roller system 9 in a horizontally movable transport, such as a pair of grippers 18.

Die Folienbahn 15 wird, nachdem der Vorzug den Abschnitt entsprechend der gewünschten Sacklänge vorgezogen hat, vom Messer 17 durchgeschnitten. Gleichzeitig erfolgt die Bodenschweißung 13. Der am unteren Ende verschlossene Leersack 11 wird einem horizontal verschieblichen Transportmittel, beispielsweise einem Greifer 18, übergeben und zur Füllstation transportiert.The film web 15, after the preference has pulled the section according to the desired bag length, cut by the knife 17. At the same time, the bottom welding takes place 13. The closed at the lower end empty bag 11 is a horizontally displaceable transport, such as a gripper 18, passed and transported to the filling station.

In der Füllstation übernimmt ein weiteres Transportmittel 4, welches aus 3,4,5 besteht, den Sackabschnitt. Der Leersack wird nun mit einem Saugersystem 16 geöffnet. Dazu wird der Greifer 4 in Z-Richtung bewegt. Der Anschlussstutzen des Transportsystems 3 wird in den Sack bewegt und schützt die Sackinnenflächen vor der Verschmutzung durch eventuelle Produktanhaftungen am Dosierrohr 2,21.In the filling station takes over a further transport 4, which consists of 3,4,5, the bag section. The empty bag is now opened with a suction system 16. For this purpose, the gripper 4 is moved in the Z direction. The connecting piece of the transport system 3 is moved into the bag and protects the sack inner surfaces from contamination by possible product adherence to the metering tube 2,21.

Der geöffnete Sack wird vom Transportsystem 3,4,5 über das Dosierrohr 2,21,22 gezogen, bis sich das untere Ende des Sackes ungefähr in Höhe der Füllgutaustrittsöffnung 31 befindet. Die Sackbodenunterstützungseinrichtung 32,33,34 wird unter den Sackboden gefahren. Das Verschlussrohr 21 wird angehoben und gibt die Produktaustrittsöffnung 31 frei. Das Produkt/Schüttgut 24 wird in den Sack gefüllt. Währenddessen senkt das Transportsystem 3,4,5 den Sack in der Weise ab, so dass sich die Produktaustrittsöffnung 31 jederzeit unterhalb des Füllspiegels befindet. Noch vor dem Ende der Dosierung des Produktes/Schüttguts 24 soll sich die Produktaustrittsöffnung 31 jedoch zumindest einmal oberhalb des Füllspiegels befinden. Nach Ende der Befüllung wird das Verschlussrohr 21 abgesenkt und verschließt die Produktaustrittsöffnung 31. Der Anschlussstutzen wird aus dem Sack gezogen. Der Greifer 4 des Transportsystems 3,4,5 wird nun entgegen der Z-Richtung bewegt und zieht den Öffnungsbereich am oberen Rand 25 des zuvor geöffneten Sacks stramm. Ein weiteres Transportmittel 14 übernimmt den befüllten Sack 8. Mittels der Verschließeinrichtung 14 wird nun der obere Rand des Sacks 25 verschlossen. Zusammen mit dem Dosiervorgang kann bei Bedarf durch den im Verschlussrohr 21 integrierten Filter 22 abgesaugt werden. Das erforderliche Vakuum wird über den Stutzen 23 eingeleitet. Die Integration des Filters 22 in das Verschlussrohr erlaubt eine sehr kompakte Bauform, die es ermöglicht, auch relativ kleine Säcke abzufüllen. Das Absaugen der Luft führt gewissermaßen zu einer Verdichtung des Schüttguts. Hierdurch kann eine der Produktmenge angemessene Sackgröße gewählt werden.The opened bag is pulled by the transport system 3,4,5 over the metering tube 2,21,22 until the lower end of the bag is approximately at the level of Füllgutaustrittsöffnung 31. The bag bottom support device 32,33,34 is driven under the sack floor. The closure tube 21 is lifted and releases the product outlet opening 31. The product / bulk material 24 is filled in the bag. Meanwhile, the transport system 3,4,5 lowers the bag in such a way that the product outlet opening 31 is always below the filling level. However, even before the end of the metering of the product / bulk material 24, the product outlet opening 31 should be at least once above the filling level. After completion of the filling, the closure tube 21 is lowered and closes the product outlet opening 31. The connection piece is pulled out of the bag. The gripper 4 of the transport system 3,4,5 is now moved counter to the Z-direction and pulls the opening area at the upper edge 25 of the previously opened bag tight. Another transport means 14 takes over the filled bag 8. By means of the closing device 14, the upper edge of the bag 25 is now closed. If necessary, it can be sucked out by the filter 22 integrated in the closure tube 21 together with the metering process. The required vacuum is introduced via the pipe 23. The integration of the filter 22 in the closure tube allows a very compact design, which makes it possible to fill even relatively small bags. The suction of the air leads to a certain extent to a compression of the bulk material. As a result, a sack size appropriate to the product quantity can be selected.

Dieser Effekt der Produktverdichtung kann durch den zusätzlichen Einsatz von Vibrationserzeugern/ Klopfern 29 noch verstärkt werden. Hier ist es vorteilhaft, das Dosierrohr 2,21,22 mittels eines Vibrationserzeugers 29 in Schwingung zu versetzen, da es sich während der Befüllung zumindest mit Teilen seiner Mantelfläche innerhalb des Produktes befindet. Die Schwingungen werden vom Dosierrohr 2,21,22 an das Befüllgut 24 übertragen, in dem dann eine Verdichtung stattfindet. Ein weiterer Vorteil des "vibrierenden Dosierrohrs" 2,21,22 ist, dass die Bildung von Produktanhaftungen am Dosierrohr 2,21,22 dadurch weitgehend vermieden werden. Der Rüttler 29 könnte auch an der "Sackbodenunterstützungsvorrichtung" 34 angeordnet sein!This effect of product compaction can be enhanced by the additional use of vibration generators / beaters 29. Here, it is advantageous to enable the dosing tube 2, 21, 22 to vibrate by means of a vibration generator 29, since it is located within the product at least with parts of its lateral surface during filling. The vibrations are transmitted from the metering tube 2,21,22 to the filling material 24, in which then takes place a compression. Another advantage of the "vibrating metering tube" 2,21,22 is that the formation of product adherence to the metering tube 2,21,22 thereby largely avoided. The vibrator 29 could also be arranged on the "Sackbodenunterstützungsvorrichtung" 34!

Eine weitere Funktion der Absaugung kann es sein, eine entsprechende Strömungsrichtung 28 vorzugeben, um den bei besonders leichten und staubigen Produkten auftretenden "Nebel" (Produktstaub) von den Sackinnenflächen im Bereich der späteren Kopfschweißnaht fernzuhalten. Hierzu muss dafür gesorgt werden, dass die Luft am Umfang des Anschlussstutzens oder zwischen Anschlussstutzen und Dosierorgan eintreten kann. Another function of the extraction may be to specify a corresponding flow direction 28 in order to keep the "fog" (product dust) occurring in particularly light and dusty products from the sack inner surfaces in the area of the later head weld seam. For this, it must be ensured that the air can enter at the circumference of the connecting piece or between the connection piece and the metering unit.

Eine besonders vorteilhafte Ausführung des Verfahrschlittens ist es, den Rahmen 5 mitsamt Stutzen 3, Transportmittel 4 sowie der Aufsaugung 16 auf Sensoren zu lagern. Die Sensoren senden ihr Signal an eine Wägeelektronik, welche letztendlich den Dosiervorgang steuert.A particularly advantageous embodiment of the carriage is to store the frame 5 together with the neck 3, transport 4 and the absorption 16 on sensors. The sensors send their signal to a weighing electronics, which ultimately controls the dosing process.

Eine andere, im gesamten FFS-Bereich vorteilhaft einsetzbare Möglichkeit der Produktverwiegung ist es, das gesamte Dosierorgan, bestehend aus 1,2,21, auf Sensoren 29 zu lagern. Die oberhalb der Dosiereinrichtung 1 befindliche Produktzuführung würde dann zunächst die auf den Sensoren gelagerte Dosiereinrichtung 1 mit einer exakten Menge Produkt 24 befüllen. Die Dauer der Dosierung wird von einer mit den Sensoren verbundenen Elektronik gesteuert. Die vorab verwogene Produktmenge kann jetzt durch das Dosierorgan mit hoher Geschwindigkeit in den Sack gefördert werden.Another possibility of product weighing which can be used advantageously in the entire FFS area is to mount the entire metering element, consisting of 1,2,21, on sensors 29. The product feed located above the metering device 1 would then first fill the metering device 1 mounted on the sensors with an exact quantity of product 24. The duration of the dosage is controlled by an electronics connected to the sensors. The pre-weighed amount of product can now be delivered through the metering at high speed in the bag.

Besonders vorteilhaft wäre es, beide Verfahren miteinander zu kombinieren. So kann sichergestellt werden, dass die vorab verwogene Produktmenge auch vollständig in den Sack gefördert wird. Denkbar wäre es auch, die vorab zu verwiegende Produktmenge vom tatsächlichen, später gemessenen Sackgewicht abhängig zu machen.It would be particularly advantageous to combine the two methods. This ensures that the pre-weighed product quantity is also completely conveyed into the bag. It would also be conceivable to make the amount of product to be weighed beforehand dependent on the actual, later measured bag weight.

Denkbar wäre aber auch eine rein volumenabhängige Dosierung, die abhängig vom Schüttgewicht des Produktes sowie dem theoretischen Fördervolumen, beispielsweise einer Schnecke, errechnet wird. In diesem Fall wäre es besonders vorteilhaft, die Berechnung der Dosierzeit über ein nachgeschaltetes Wägesystem, beispielsweise eine Bandkontrollwaage, zu regeln.However, it would also be conceivable to use a purely volume-dependent dosage, which is calculated as a function of the bulk density of the product and the theoretical delivery volume, for example a screw. In this case, it would be particularly advantageous to regulate the calculation of the dosing time via a downstream weighing system, for example a belt check scale.

Das Dosiersystem kann bei direkter Dosierung in den Sack vorzugsweise aus einem vertikal angeordneten Schneckenförderer bestehen.The metering system can preferably consist of a vertically arranged screw conveyor with direct metering into the bag.

Im Falle der Vorabverwiegung kann das Schüttgut aber auch mittels eines Drucksystems in den Sack gepumpt werden. Hierzu wird der Schüttgutspiegel im Trichter 1 einem Überdruck ausgesetzt. Dieses Verfahren setzt aufgrund des erforderlichen Gegendrucks eine Unterspiegelbefüllung voraus. Die in diesem Fall vom Schüttgut eingebrachte Luft kann über den im Verschlussrohr integrierten Filter 22 aus dem Sack abgesaugt werden.In the case of preliminary weighing, the bulk material can also be pumped into the bag by means of a pressure system. For this purpose, the bulk material level in the hopper 1 is exposed to an overpressure. This method requires a Unterspiegelbefüllung due to the required back pressure. The air introduced from the bulk material in this case can be sucked out of the bag via the filter 22 integrated in the closure tube.

Eine andere Ausführung wäre es, bei der Abfüllung fließfähiger Schüttgüter, bei denen die Staubentwicklung nicht so stark ist, die Befüllung mittels Schwerkraft erfolgen zu lassen. Bezugszeichenliste 1 Trichter 2 Dosierorgan 3 Anschlussstutzen 4 Transportmittel 5 Rahmen 6 Führung 7 Schnecke 8 Befüllter Sack 9 Vorzugrollen 10 Transportmittel 11 Leersack 12 Führung 13 Bodenschweißung 14 Kopfnahtschweißung 15 Schlauchfolienbahn 16 Sauger 17 Messer 18 Transportmittel 19 Abwickelvorrichtung 20 Verschluss 21 Verschlussrohr mit Filter 22 Filter 23 Stutzen 24 Produkt/Schüttgut 25 Oberer Rand des Sackes 26 Sensoren 27 Transportband 28 Gerichtete Strömung 29 Vibrationserzeuger 30 Kontrollwaage 31 Füllgutaustrittsöffnung 32 Führung 33 Gelenk 34 Sackbodenunterstützung Another embodiment would be to make the filling by gravity in the filling of flowable bulk materials in which the dust is not so strong. LIST OF REFERENCE NUMBERS 1 funnel 2 metering 3 spigot 4 Mode of Transport 5 frame 6 guide 7 slug 8th Filled sack 9 drawing rollers 10 Mode of Transport 11 empty bag 12 guide 13 bottom weld 14 Kopfnahtschweißung 15 Blown film web 16 sucker 17 knife 18 Mode of Transport 19 unwinding 20 shutter 21 Closing pipe with filter 22 filter 23 Support 24 Product / bulk 25 Upper edge of the bag 26 sensors 27 conveyor belt 28 Directed flow 29 vibration generator 30 checkweigher 31 product discharge opening 32 guide 33 joint 34 Sack ground support

Claims (18)

  1. Machine for forming, filling and sealing of sacks (8, 11) that has the following device characteristics:
    • an unwinding device (19) for a plastic tube (15),
    • a cross cutting device (17) that cuts the tube perpendicular to its principal axis of symmetry and thus creates tubular pieces,
    • a bottom forming device (13) for forming a sack bottom at one end of the tubular piece,
    • transportation devices (4, 10, 18) for conveying the resulting sacks through the machine,
    • a filling station with a feed element (2) for filling the sacks (8, 11) with a product (24),
    • means (3, 4, 5) of reducing the distance between the product discharge opening of the feed element and the bottom of the sack to be filled, and
    • sealing means for sealing the filled sack,
    characterized by the fact
    - that the means (3, 4, 5) of reducing the distance between the product discharge opening (31) and the bottom of the sack to be filled include a sack lifting device (3, 4, 5) with the help of which the sack (8, 11) can be lifted in the filling station in such a way that its top edge (25) is located above the product discharge opening (31) of the feed element (2),
    - and that a control device is provided
    - that is connected to measuring instruments (26) that transfer information to the control device. This information is used to determine the filling level of the sack (8).
    - and that regulates the distance between the product discharge opening and the filling level of the sack (8) in such a way that material- and filling speed specific target values are observed to minimize mist formation in the product.
  2. Machine according to the preceding claim,
    characterized in that
    a control device that guides the sack lifting unit in such a way that it is lowered slowly as the sacks are filled.
  3. Machine according to one of the preceding claims,
    characterized by
    a control device
    that guides the sack lifting unit (3, 4, 5) as a function of time in such a way that it lowers the sack (8, 11) slowly as it is filled.
  4. Machine according to one of the preceding claims,
    characterized by
    a means (3, 4, 5) of reducing the distance between the product discharge opening (31) and the bottom of the sack to be filled that includes a sack lifting unit (3, 4, 5) for lifting the sack (8, 11) by half its length.
  5. Machine according to one of the preceding claims,
    characterized by
    a means (3, 4, 5) of reducing the distance between the product discharge opening (31) and the bottom of the sack (8, 11) to be filled that includes a sack lifting unit (3, 4, 5) for lifting the sack (8, 11) by two-thirds of its length.
  6. Machine according to one of the preceding claims,
    characterized by
    the means (3, 4, 5) of reducing the distance between the product discharge opening (31) and the bottom of the sack (8, 11) to be filled that cover a sack lifting unit (3, 4, 5) for lifting the sack with the help of which the sack (8, 11) can be moved vertically along the transporting direction of the product (24) at the time of the filling.
  7. Machine according to one of the preceding claims,
    characterized by
    a fixed metering unit (2).
  8. Machine according to one of the preceding claims,
    characterized by the fact that
    the material unit (2) covers only a downpipe (21) and a screw (7).
  9. Machine according to one of the preceding claims,
    characterized by
    a sack bottom supporting device (32, 33, 34) that supports the bottom of the sack (8, 11) at least during a part of the filling operation.
  10. Machine according to one of the preceding claims,
    characterized in that
    the sack bottom supporting device (32, 33, 34) covers vertically moveable supporting surfaces.
  11. Machine according to one of the preceding claims,
    characterized in that
    the sack bottom supporting device (32, 33, 34) covers a supporting area that can be swivelled.
  12. Machine according to one of the preceding claims,
    characterized by
    a connecting socket (3) which grips around at least parts of the material unit (2) and can be positioned between the material unit (2) and the inner wall of the sack (8, 11).
  13. Machine according to one of the preceding claims,
    characterized in that
    the connecting socket (3) can be moved along the material unit (2).
  14. Machine according to one of the preceding claims,
    characterized in that
    the sack lifting unit (3, 4, 5) and/or the sack bottom supporting device (32, 33, 34) have means for determining the weight of the sack.
  15. Machine according to one of the preceding claims,
    characterized in that
    the sack lifting unit (3, 4, 5) and/or the sack bottom supporting device (33, 34, 35) and/or the metering pipe is connected to active means of generating vibrations.
  16. Process of forming, filling and sealing sacks (8, 11) having the following process characteristics:
    • unwinding of a plastic tube (15),
    • cross cutting of the tube perpendicular to its principal axis of symmetry, resulting in the production of tubular pieces,
    • forming a sack bottom at one end of the tubular pieces,
    • transportation of the resulting sacks through the machine,
    • filling the sack (8, 11) with product (24) through a material unit,
    • reducing the distance between the product discharge opening of the feed element and the bottom of the sack to be filled,
    • sealing the filled sacks,
    characterized by
    - the reduction of the distance between the product discharge opening of the feed element and the bottom of the sack to be filled by a vertical movement of the sack,
    - the transfer of information to a control device. This information is used to determine the filling level of the sack (8).
    - the regulation of the distance between the product discharge opening and the filling level (8, 11), the product discharge opening (31) of the feed element (2) is always at a target level below the filling level of the sack.
    - even before the end of the feed, the product discharge opening (31) is above the filling level at least once.
  17. Process according to the preceding claim,
    characterized by the fact that
    the control device determines the filling level of the sack from its momentary weight.
  18. Process according to one of the two preceding claims,
    characterized by the fact that
    the control device determined the filling level of the sack from the volume flow of the product.
EP05798034A 2004-11-11 2005-10-24 Machine for forming, filling and closing bags with a bag lifting device Active EP1819596B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05798034T PL1819596T3 (en) 2004-11-11 2005-10-24 Machine for forming, filling and closing bags with a bag lifting device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004054621 2004-11-11
DE102005037916.8A DE102005037916B4 (en) 2004-11-11 2005-08-11 Machine for forming, filling and closing sacks and method of operating same
PCT/EP2005/011418 WO2006053627A1 (en) 2004-11-11 2005-10-24 Machine for forming, filling and closing bags with a bag lifting device

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EP1819596A1 EP1819596A1 (en) 2007-08-22
EP1819596B1 true EP1819596B1 (en) 2008-10-01

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US (1) US7877966B2 (en)
EP (1) EP1819596B1 (en)
JP (1) JP5015000B2 (en)
CN (1) CN101137546B (en)
AT (1) ATE409643T1 (en)
DE (2) DE102005037916B4 (en)
ES (1) ES2311237T3 (en)
PL (1) PL1819596T3 (en)
WO (1) WO2006053627A1 (en)

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Also Published As

Publication number Publication date
JP5015000B2 (en) 2012-08-29
DE502005005568D1 (en) 2008-11-13
CN101137546A (en) 2008-03-05
DE102005037916B4 (en) 2018-08-02
US20070294982A1 (en) 2007-12-27
PL1819596T3 (en) 2009-04-30
ATE409643T1 (en) 2008-10-15
CN101137546B (en) 2010-09-29
US7877966B2 (en) 2011-02-01
WO2006053627A1 (en) 2006-05-26
DE102005037916A1 (en) 2006-05-24
EP1819596A1 (en) 2007-08-22
ES2311237T3 (en) 2009-02-01
JP2008519738A (en) 2008-06-12

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