EP1597059A1 - Method for the production of bags - Google Patents

Method for the production of bags

Info

Publication number
EP1597059A1
EP1597059A1 EP04710870A EP04710870A EP1597059A1 EP 1597059 A1 EP1597059 A1 EP 1597059A1 EP 04710870 A EP04710870 A EP 04710870A EP 04710870 A EP04710870 A EP 04710870A EP 1597059 A1 EP1597059 A1 EP 1597059A1
Authority
EP
European Patent Office
Prior art keywords
tube
film
sack
bag
formation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04710870A
Other languages
German (de)
French (fr)
Inventor
Uwe Köhn
Konrad Tetenborg
Jan Thorsten Weber
Siegfried Maneke
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
Original Assignee
Windmoeller and Hoelscher KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP1597059A1 publication Critical patent/EP1597059A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/002—Flexible containers made from sheets or blanks, e.g. from flattened tubes by joining superimposed sheets, e.g. with separate bottom sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2170/00—Construction of flexible containers
    • B31B2170/10—Construction of flexible containers interconnected
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • B31B70/266—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement involving gusset-forming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/36—Folding sheets, blanks or webs by continuously feeding them to stationary members, e.g. plates, ploughs or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/644—Making seals parallel to the direction of movement, i.e. longitudinal sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/92—Delivering
    • B31B70/94—Delivering singly or in succession
    • B31B70/946—Delivering singly or in succession the bags being interconnected
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1303—Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
    • Y10T428/1307—Bag or tubular film [e.g., pouch, flexible food casing, envelope, etc.]

Definitions

  • the invention relates to a method for producing sacks. Protection for the film tube wrap is also sought.
  • FFS machines form, fill and seal machines
  • film tubes are formed for processing on the FFS machines by blown film extrusion, the format (here the scope) of which corresponds to that of the sack formed.
  • this procedure means that expensive format changes have to be carried out relatively often in the extrusion systems in order to be able to implement different sack formats.
  • they are used for bag formation required formats relatively small and can be generated relatively uneconomical. Blown film lines of larger format produce the same film at a lower cost per unit area.
  • tube pieces for the production of high-quality sacks are also produced.
  • gusseted bags or sacks from tubular pieces which are formed from a plurality of film sections.
  • the edges of the respective film sections are welded together for this purpose. This process is carried out between welding jaws, which lock the material to be welded during the welding process.
  • tubular pieces are already produced in this way, the length of which corresponds to that of the later bags.
  • the pieces of tubing formed are brought to the later bag length immediately after they have been produced and are supplied in individual forms to bag-forming and filling devices.
  • This way of forming high quality sacks is well known in the pet food sector, for example.
  • both the transport of individual pieces of hose and the introduction of the same into a sack formation and filling process are complex. It usually takes place with rotary feeders or other suction devices, which grip the tube pieces individually and feed them to the bag forming device. Such devices are expensive and prone to failure.
  • the object of the present invention is to propose a method for producing bags according to the preamble of claim 1, in which the feeding of the tube material is easier.
  • This object is achieved in that the material necessary for bag formation in the form of a film tube (25, 40), which is wound on a roll, is fed to the unwinding device of a bottom-forming device, which separates the unwound tube into tube pieces and closes at least one end of the bag ,
  • the publications DE 199 33 446, DE 199 20478 and DE 199 36 660 already mentioned at the beginning show a type of suitable device which, in addition to closing one end of the bag, can also fill the bag and close the other end of the bag.
  • the hose necessary for forming the sack is unwound from a wrap.
  • the one on this Properties-related scope of the disclosure of this document therefore belongs to the content of the present document.
  • Fig. 1 The side view of a device according to the invention
  • FIG. 2 The view of the device according to the invention from Figure 1 from above
  • Fig. 5 shows a section through a hose according to the invention
  • Fig. 6 shows a section through another hose according to the invention
  • the figures show a device 1, the function of which is described below primarily by means of the path of the film web E through the device 1.
  • the device has a unwinding device 2 from which the film web E is unwound.
  • the film web E is first transported in the direction of the arrow in the direction of the later hose axis z and fed via the deflection rollers 3 and 4 to the cutting station 5, which is only symbolized by the line II-II.
  • the cutting station has cutting tools, not shown, with which the web E is cut into the webs A, B, C and D.
  • the film web A is deflected twice on the turning bars 6 and 7, so that it reverses its direction and is finally fed to the joint 8 against the direction z. It is also worth mentioning in this connection that the turning bar 6 can be displaced in the z direction, so that the longitudinal register of the film web A can be adjusted here. This fact is indicated by arrow 45. Longitudinal register of film web A can be set here. This fact is indicated by arrow 45.
  • the film web B is guided over the rollers 9 and 10, the turning bar 11 and the roller 12. Here it moves temporarily in the x direction. Above the joining station 8, the film web still runs over the roller 13, via which it is guided in the direction of the nip 50 between the squeeze rollers 14 and 15 ' . Between the roll 13 and the roll nip 50, the web runs over a triangle 51 shown in FIG. In this way, the previously flat web B is folded, so that, at the latest after being squeezed by the rollers 14 and 15, a clearly defined fold edge is formed in the roller gap 50, which forms a side fold 26 in the finished tube 25. In FIG. 4, no further machine components have been shown.
  • the register correction on the web B can be carried out by moving the roller 12 in the x direction (arrow 46).
  • the film web C is first passed over the rollers 9, 16, 17 and 19, the arrow 20 indicating the adjustability of the roller 18 in the y direction, which in turn enables a longitudinal register correction of the web C.
  • the web C runs over the turning bar 21, whereupon the web C runs in the x direction towards the roller 22 and is deflected downwards by this towards the roller gap 50 defined by the rollers 14 and 15 .
  • the formation of a side fold by folding the web C proceeds analogously to the processing of the web B shown above: after the deflection of the web C by the roller 22, the web runs over a triangle, not shown, of profile tubes, the tip of which points to the nip 50. In this way, the web C arrives folded in the nip 50.
  • the flat film web D runs over the rollers 9, 23, 30 into the roller gap 50 defined by the rollers 14 and 15.
  • the adjustability of the roller 23 in the y direction indicated by the arrow 24 enables a register correction on the course D.
  • all of the webs A to D required for forming the tube are thus joined in the joint 8 or more precisely in the nip 50 defined by the rollers 14 and 15.
  • extrudate is provided by the two extrusion devices 31.
  • the extrudate in the extruder 32 generated in the extruder screw a high pressures, provided on the extruder and arms 33 a, b transported through the nip 50 of the joint.
  • the extrudate is extruded through the nozzles 34 a, b, 35 a, b provided for this purpose onto the edges of the webs A to D, which are connected to one another in the nip 50 immediately after this process.
  • the extrudate is applied in a heated state, so that the cooling of the extrudate leads to a firm connection of the film webs.
  • Polyolefins can be used as extrudate.
  • the film tube 25 is already formed. It is initially promoted in the direction of gravity. This orientation of the hose is advantageous for the strengthening of the joints 27 or the distribution of the extrudate.
  • the hose 25 runs over the rollers 38 and 35 to the winding 36, which is also shown symbolically. In connection with the described FIGS.
  • the motor 60 which transmits torque to the extruder via a belt (not shown), the fan 61 and the machine frame 37 are also worth mentioning.
  • the illustration of other holding elements of further device components such as rollers or deflecting rods has been dispensed with, since the storage and holding of such components are familiar to the person skilled in the art.
  • FIG. 5 shows the cross section of a sack 25 represented by the device shown.
  • the figure shows the webs AD, the joining points 27 connecting them and the side folds 26.
  • Another cross section of a sack according to the invention is shown in FIG.
  • the hose 40 according to the invention shown in FIG. 6 has four joining seams 27 which connect four webs M, N, O, P to one another.
  • the hose 40 has no side folds 26.
  • FIGS. 5 and 6 show a hose in which the seams 27 connect entire layers of film or material (AD) to one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)

Abstract

The invention relates to a method for producing a bag (25,40) made of a polymer and/or metal film material. Said bag (25,40) is closed at the bottom end thereof and is provided with four outer walls (A-D) that are connected by means of four seams (27). The novelty of the invention lies in the fact that the material (A-E) needed to make the bag is fed to an unwinding device of a bottom-forming apparatus in the form of a film tube (25, 40) that is coiled on a reel while the bottom-forming apparatus separates the unwound tube into tube parts and seals at least one end of the bag.

Description

Verfahren zur Herstellung von Säcken Process for the production of sacks
Die Erfindung betrifft ein Verfahren zur Herstellung von Säcken. Des Weiteren wird Schutz für den Folienschlauchwickel begehrt.The invention relates to a method for producing sacks. Protection for the film tube wrap is also sought.
Säcke werden unter anderem von sogenannten Form, Fill and Seal-Maschinen (im Folgenden FFS-Maschinen) hergestellt.Sacks are manufactured using so-called form, fill and seal machines (hereinafter referred to as FFS machines).
Diese Maschinen, welche unter anderem in den Druckschriften DE 199 33 486, EP 534 062, DE 44 23 964, DE 199 20478 und DE 199 36 660 gezeigt sind, verfügen über Abwicklungsvorrichtungen, auf denen Schläuche gespeichert sind. Von diesen Abwicklungsvorrichtungen wird der Schlauch abgewickelt und zu Schlauchstücken vereinzelt. In weiteren Arbeitsgängen werden in der RegelThese machines, which are shown, inter alia, in the publications DE 199 33 486, EP 534 062, DE 44 23 964, DE 199 20478 and DE 199 36 660, have unwinding devices on which hoses are stored. The hose is unwound from these unwinding devices and separated into pieces of hose. In other operations, as a rule
Schlauchböden gebildet, Füllgut in den entstandenen Sack gefüllt sowie der Sack verschlossen. Die Art der Sackbildung und Befüllung, die in den genannten Druckschriften gezeigt wird, ist Teil des Offenbarungsgehalts dieserTube bottoms formed, contents filled in the resulting sack and the sack closed. The type of bag formation and filling that is shown in the cited documents is part of the disclosure content of these
Druckschrift. Dasselbe gilt für die in diesen Druckschriften vorgenommenPublication. The same applies to those made in these publications
Bestimmungen des Begriffs der Form Fill and Seal-Maschinen (FFS) sowie für den Transport der Folienschläuche, Folienabschnitte und Säcke in diesen Maschinen. In der Regel wird mit diesen Maschinen Schüttgut abgefüllt.Provisions of the concept of the form fill and seal machines (FFS) as well as for the transport of the film tubes, film sections and bags in these machines. As a rule, bulk goods are filled with these machines.
In der Regel werden zur Verarbeitung an den FFS- Maschinen durch Blasfolienextrusion Folienschläuche gebildet, deren Format (hier deren Umfang) mit dem des gebildeten Sackes übereinstimmt. Diese Vorgehensweise führt jedoch dazu, dass schon an den Extrusionsanlagen relativ häufig teure Formatwechsel vorgenommen werden müssen, um unterschiedliche Sackformate realisieren zu können. Darüber hinaus sind die zur Sackbildung benötigten Formate relativ klein und lassen sich relativ unwirtschaftlich erzeugen. Blasfolienanlagen größeren Formats erzeugen gleiche Folie zu geringeren Kosten pro Flächeneinheit.As a rule, film tubes are formed for processing on the FFS machines by blown film extrusion, the format (here the scope) of which corresponds to that of the sack formed. However, this procedure means that expensive format changes have to be carried out relatively often in the extrusion systems in order to be able to implement different sack formats. In addition, they are used for bag formation required formats relatively small and can be generated relatively uneconomical. Blown film lines of larger format produce the same film at a lower cost per unit area.
Daher ist des Öfteren versucht worden, zunächst sehr breite Folienbahnen durch Flachfolienextrusion oder durch Blasfolienextrusion an Anlagen großen Formats herzustellen, wobei in der Regel ebenfalls in erster' Linie . aus Kostengründen Blasfolienextrusionsanlagen bevorzugt wurden. Die entstandenen Folienschläuche oder Folienbahnen großen Formats wurden dann durch formatgerechtes Schneiden zu Flachfolienbahnen weiterverarbeitet.Therefore, many a time it has been tried initially to produce very broad film webs by flat film extrusion or by blown to large format systems, and usually also the first 'line. Blown film extrusion lines were preferred for cost reasons. The resulting film tubes or film webs of large format were then further processed into flat film webs by cutting them according to the format.
Daraufhin wurde eine dieser flachgelegten Folienbahnen zu einem Schlauch zusammengelegt und durch eine Längsschweißnaht zu einem Schlauch verbunden. Ein Nachteil solcher in der Regel sehr kurzer Schläuche besteht darin, dass die durch die Längsschweißnaht verursachte Dickstelle das Aufwickeln des Schlauches erschwert, da die Schlauchrolle teleskopiert, das heißt durch die Addition der Dickstellen eine kegβlstumpfartige Form annimmt.Thereupon one of these flattened film webs was folded into a tube and connected to a tube by a longitudinal weld seam. A disadvantage of such generally very short hoses is that the thick point caused by the longitudinal weld seam makes it more difficult to wind up the hose, since the hose reel telescopes, that is, it takes on the shape of a truncated cone due to the addition of the thick points.
In ähnlicher Weise werden auch Schlauchstücke zur Herstellung höherwertiger Säcke hergestellt. So ist es zum Beispiel bekannt, Seitenfaltenbeutel oder - sacke aus Schlauchstücken herzustellen, welche aus mehreren Folienabschnitten gebildet sind. In der Regel werden zu diesem Zweck die Ränder der jeweiligen Folienabschnitte miteinander verschweißt. Dieser Vorgang wird zwischen Schweißbacken vorgenommen, die das zu verschweißende Material während des Schweißvorganges arretieren.In a similar way, tube pieces for the production of high-quality sacks are also produced. For example, it is known to produce gusseted bags or sacks from tubular pieces which are formed from a plurality of film sections. As a rule, the edges of the respective film sections are welded together for this purpose. This process is carried out between welding jaws, which lock the material to be welded during the welding process.
In der Regel werden auf diese Weise bereits Schlauchstücke hergestellt, deren Länge der der späteren Säcke entspricht. In anderen Fällen werden die gebildeten Schlauchstücke direkt nach ihrer Herstellung auf die spätere Sacklänge gebracht und in vereinzelter Form Sackbildungs- und Befülleinrichtungen zugeführt. Diese Art der Bildung hochwertiger Säcke ist zum Beispiel im Petfood-Bereich wohlbekannt. Allerdings ist sowohl der Transport vereinzelter Schlauchstücke als auch das Einbringen derselben in einen Sackbildungs- und Befüllungsprozess aufwendig. Es erfolgt in der Regel mit Rotationsanlegern oder andere Saugvorrichtungen, welche die Schlauchstücke einzeln greifen und der Sackbildungsvorrichtung zuführen. Solche Vorrichtungen sind teuer und störungsanfällig.As a rule, tubular pieces are already produced in this way, the length of which corresponds to that of the later bags. In other cases, the pieces of tubing formed are brought to the later bag length immediately after they have been produced and are supplied in individual forms to bag-forming and filling devices. This way of forming high quality sacks is well known in the pet food sector, for example. However, both the transport of individual pieces of hose and the introduction of the same into a sack formation and filling process are complex. It usually takes place with rotary feeders or other suction devices, which grip the tube pieces individually and feed them to the bag forming device. Such devices are expensive and prone to failure.
Daher besteht die Aufgabe der vorliegenden Erfindung darin, einen Verfahren zur Herstellung von Säcken nach dem Oberbegriff des Anspruchs 1 vorzuschlagen, bei dem das Zuführen des Schlauchmaterials einfacher vonstatten geht.Therefore, the object of the present invention is to propose a method for producing bags according to the preamble of claim 1, in which the feeding of the tube material is easier.
Diese Aufgabe wird dadurch gelöst, dass das zur Sackbildung notwendige Material in Gestalt eines Folienschlauchs (25, 40), welcher auf einer Rolle aufgewickelt ist, der Abwicklungseinrichtung einer Bodenbildungsvorrichtung zugeführt wird, welche den abgewickelten Schlauch zu Schlauchstücken vereinzelt und zumindest ein Ende des Sackes verschließt.This object is achieved in that the material necessary for bag formation in the form of a film tube (25, 40), which is wound on a roll, is fed to the unwinding device of a bottom-forming device, which separates the unwound tube into tube pieces and closes at least one end of the bag ,
Die Herstellung von Schläuchen mit einer Länge, die das erfindungsgemäße Verfahren lohnend erscheinen lässt, war bisher nicht möglich. Die gegenständliche Beschreibung offenbart jedoch ein solches Herstellverfahren. Neben der Vereinfachung bei dem Einbringen des Schlauchs bringt die Anwendung des erfindungsgemäßen Verfahrens auch eine Reduktion des Transportaufwandes mit sich, da sich Folienwickel gut transportieren lassen. Das erfindungsgemäße Verfahren lässt sich an den Eingangs erwähnten FFS- Maschinen durchführen. Da diese Maschinen deutlich höhere Abfüllgeschwindigkeiten aufweisen als die bisher zur Fertigung und Befüllung der im Oberbegriff des Anspruchs 1 erwähnten Säcke, sind auch in diesem Zusammenhange große Vorteile zu erwarten. Auf die Darstellung einer Vorrichtung, an welcher sich das erfindungsgemäße Verfahren durchgeführt werden kann, wird im Rahmen dieser Anmeldung verzichtet. Beispielsweise die bereits eingangs erwähnten Druckschriften DE 199 33 446, DE 199 20478 und DE 199 36 660 zeigen einen Typ geeigneter Vorrichtungen, der neben dem Verschließen eines Sackendes auch noch die Befüllung des Sackes und den Verschluss des anderen Sackendes durchführen kann. Der zur Sackbildung notwendige Schlauch wird von einem Wickel abgewickelt. Der auf diese Eigenschaften gerichtete Umfang der Offenbarung dieser Druckschrift gehört damit zum Inhalt der vorliegenden Druckschrift.The production of hoses with a length that makes the process according to the invention seem worthwhile has not previously been possible. However, the present description discloses such a manufacturing process. In addition to simplifying the insertion of the tube, the use of the method according to the invention also entails a reduction in the amount of transport, since film wraps can be easily transported. The method according to the invention can be carried out on the FFS machines mentioned at the beginning. Since these machines have significantly higher filling speeds than the hitherto used to manufacture and fill the bags mentioned in the preamble of claim 1, great advantages can also be expected in this connection. The representation of a device on which the method according to the invention can be carried out is dispensed with in the context of this application. For example, the publications DE 199 33 446, DE 199 20478 and DE 199 36 660 already mentioned at the beginning show a type of suitable device which, in addition to closing one end of the bag, can also fill the bag and close the other end of the bag. The hose necessary for forming the sack is unwound from a wrap. The one on this Properties-related scope of the disclosure of this document therefore belongs to the content of the present document.
Auch der Gestalt des Folienwickels, den es bisher nicht gab, kommt große Aufmerksamkeit zu.Great attention is also paid to the shape of the film wrap, which has not existed before.
Weitere Ausführungsbeispiele der Erfindung gehen aus der gegenständlichen' Beschreibung und den Ansprüchen hervor. Die einzelnen Figuren zeigen:Further embodiments of the invention will become apparent from the objective 'description and claims. The individual figures show:
Fig. 1 Die Seitenansicht einer erfindungsgemäßen VorrichtungFig. 1 The side view of a device according to the invention
Fig. 2 Die Ansicht der erfindungsgemäßen Vorrichtung aus Figur 1 von obenFig. 2 The view of the device according to the invention from Figure 1 from above
Fig. 3 Den Schnitt l-l aus Figur 13 shows the section l-l from Figure 1
Fig. 4. Eine Skizze der Bahnverlaufs vor dem Walzenspalt 50Fig. 4. A sketch of the path in front of the nip 50
Fig. 5 Einen Schnitt durch einen erfindungsgemäßen SchlauchFig. 5 shows a section through a hose according to the invention
Fig. 6 Einen Schnitt durch einen anderen erfindungsgemäßen SchlauchFig. 6 shows a section through another hose according to the invention
Die Figuren zeigen eine Vorrichtung 1 , deren Funktion im Folgenden vor allem an Hand des Weges der Folienbahn E durch die Vorrichtung 1 beschrieben wird. Die Vorrichtung verfügt über eine Abwicklungsvorrichtung 2 von der die Folienbahn E abgewickelt wird. Die Folienbahn E wird in Richtung des Pfeiles zunächst in Richtung der späteren Schlauchachse z transportiert und über die Umlenkwalzen 3 und 4 der lediglich durch die Linie II - II symbolisierte Schneidestation 5 zugeführt. Die Schneidestation verfügt über nicht dargestellte Schneidwerkzeuge, mit denen die Bahn E zu den Bahnen A, B, C und D zerschnitten wird.The figures show a device 1, the function of which is described below primarily by means of the path of the film web E through the device 1. The device has a unwinding device 2 from which the film web E is unwound. The film web E is first transported in the direction of the arrow in the direction of the later hose axis z and fed via the deflection rollers 3 and 4 to the cutting station 5, which is only symbolized by the line II-II. The cutting station has cutting tools, not shown, with which the web E is cut into the webs A, B, C and D.
Die Folienbahn A wird an den Wendestangen 6 und 7 zweimal umgelenkt, so dass sie ihre Richtung umkehrt und schließlich entgegen der Richtung z der Fügestelle 8 zugeführt wird. Erwähnenswert ist in diesem Zusammenhang noch, dass die Wendestange 6 in z-Richtung verschiebbar ist, so dass sich das Längsregister der Folienbahn A hier einstellen lässt. Dieser Umstand ist durch den Pfeil 45 angedeutet. Längsregister der Folienbahn A hier einstellen lässt. Dieser Umstand ist durch den Pfeil 45 angedeutet.The film web A is deflected twice on the turning bars 6 and 7, so that it reverses its direction and is finally fed to the joint 8 against the direction z. It is also worth mentioning in this connection that the turning bar 6 can be displaced in the z direction, so that the longitudinal register of the film web A can be adjusted here. This fact is indicated by arrow 45. Longitudinal register of film web A can be set here. This fact is indicated by arrow 45.
Die Folienbahn B wird über die Walzen 9 und 10, die Wendestange 11 und die Walze 12 geführt. Hierbei bewegt sie sich zeitweise in x-Richtung. Oberhalb der Fügestation 8 läuft die Folienbahn noch über die Walze 13, über die sie in Richtung auf den Walzenspalt 50 zwischen den Abquetschwalzen 14 und 15' geführt wird. Zwischen der Walze 13 und dem Walzenspalt 50 läuft die Bahn über ein in Figur 4 dargestelltes Dreieck 51 aus Profilrohren. Auf diese Weise wird die zuvor flach liegende Bahn B gefaltet, so dass spätestens nach der Abquetschung durch die Walzen 14 und 15 in dem Walzenspalt 50 eine klar definierte Falzkante, welche in dem fertiggestellten Schlauch 25 eine Seitenfalte 26 bildet, entsteht. In Figur 4 wurde auf die Darstellung weiterer Maschinenkomponenten verzichtet. Die Registerkorrektur an der Bahn B kann durch eine Verschiebung der Walze 12 in x-Richtung vorgenommen werden (Pfeil 46).The film web B is guided over the rollers 9 and 10, the turning bar 11 and the roller 12. Here it moves temporarily in the x direction. Above the joining station 8, the film web still runs over the roller 13, via which it is guided in the direction of the nip 50 between the squeeze rollers 14 and 15 ' . Between the roll 13 and the roll nip 50, the web runs over a triangle 51 shown in FIG. In this way, the previously flat web B is folded, so that, at the latest after being squeezed by the rollers 14 and 15, a clearly defined fold edge is formed in the roller gap 50, which forms a side fold 26 in the finished tube 25. In FIG. 4, no further machine components have been shown. The register correction on the web B can be carried out by moving the roller 12 in the x direction (arrow 46).
Die Folienbahn C wird zunächst über die Walzen 9, 16, 17, und 19 geführt, wobei der Pfeil 20 die Verstellbarkeit der Walze 18 in y-Richtung andeutet, welche wieder eine Längsregisterkorrektur der Bahn C ermöglicht. Nach der Passage der Walze 19 läuft die Bahn C über die Wendestange 21 , woraufhin die Bahn C in x-Richtung auf die Walze 22 zuläuft und von dieser nach unten in Richtung auf den von den Walzen 14 und 15 definierten Wal∑enspalt 50 umgelenkt wird. Die Bildung einer Seitenfalte durch eine Faltung der Bahn C läuft analog zu der oben dargestellten Bearbeitung der Bahn B: Nach der Umlenkung der Bahn C durch die Walze 22 läuft die Bahn über ein nicht dargestelltes Dreieck aus Profilrohren, dessen Spitze auf den Walzenspalt 50 zeigt. Die Bahn C kommt auf diese Weise gefaltet in dem Walzenspalt 50 an. An dieser Stelle sei noch einmal angemerkt, dass es auch andere Möglichkeiten zur Faltenbildung sowohl an Bahnen als auch der Seitenfaltenbildung an Schläuchen oder Säcken gibt, die auch in erfindungsgemäßen Vorrichtungen zum Einsatz kommen können.The film web C is first passed over the rollers 9, 16, 17 and 19, the arrow 20 indicating the adjustability of the roller 18 in the y direction, which in turn enables a longitudinal register correction of the web C. After the passage of the roller 19, the web C runs over the turning bar 21, whereupon the web C runs in the x direction towards the roller 22 and is deflected downwards by this towards the roller gap 50 defined by the rollers 14 and 15 , The formation of a side fold by folding the web C proceeds analogously to the processing of the web B shown above: after the deflection of the web C by the roller 22, the web runs over a triangle, not shown, of profile tubes, the tip of which points to the nip 50. In this way, the web C arrives folded in the nip 50. At this point, it should be noted once again that there are other possibilities for the formation of folds on webs as well as the formation of side folds on hoses or bags, which can also be used in devices according to the invention.
Die Flachfolienbahn D läuft, nachdem sie die Schneidestation 5 durchlaufen hat, über die Walzen 9, 23, 30 in den durch die Walzen 14 und 15 definierten Walzenspalt 50. Die durch den Pfeil 24 angedeutete Verstellbarkeit der Walze 23 in y-Richtung ermöglicht eine Registerkorrektur an der Bahn D. In dem dargestellten Ausführungsbeispiel einer Vorrichtung 1 werden also alle zur Schlauchbildung benötigten Bahnen A bis D in der Fügestelle 8 oder genauer in dem durch die Walzen 14 und 15 definierten Walzenspalt 50 zusammengefügt. Um die Fügestellen 27 fest miteinander zu verbinden, wird von den zwei Extrusionsvorrichtungen 31 Extrudat bereitgestellt. Genau genommen wird das' Extrudat in dem Extruder 32, in dem eine Extruderschnecke hohe Drücke erzeugt, bereitgestellt und über die Extruderarme 33 a,b über den Walzenspalt 50 der Fügestelle 8 transportiert. Hier wird das Extrudat durch die dafür vorgesehenen Düsen 34 a,b, 35 a,b auf die Ränder der Bahnen A bis D extrudiert, welche unmittelbar nach diesem Vorgang in dem Walzenspalt 50 miteinander verbunden werden.After it has passed through the cutting station 5, the flat film web D runs over the rollers 9, 23, 30 into the roller gap 50 defined by the rollers 14 and 15. The adjustability of the roller 23 in the y direction indicated by the arrow 24 enables a register correction on the course D. In the exemplary embodiment of a device 1 shown, all of the webs A to D required for forming the tube are thus joined in the joint 8 or more precisely in the nip 50 defined by the rollers 14 and 15. In order to firmly connect the joints 27 to one another, extrudate is provided by the two extrusion devices 31. Strictly speaking, the "extrudate in the extruder 32, generated in the extruder screw a high pressures, provided on the extruder and arms 33 a, b transported through the nip 50 of the joint. 8 Here, the extrudate is extruded through the nozzles 34 a, b, 35 a, b provided for this purpose onto the edges of the webs A to D, which are connected to one another in the nip 50 immediately after this process.
In der Regel wird das Extrudat in erhitztem Zustand aufgebracht, so dass die Erkaltung des Extrudats zu einer festen Verbindung der Folienbahnen führt. Als Extrudat können Polyolefine Verwendung finden. Jedoch ist an dieser Stelle auch an die Verwendung aller möglichen Formen von Klebstoff, oder an eine Verschweißung der Ränder der Bahnen in Betracht zu ziehen. Nach dem Verlassen des Walzenspalts 50 ist der Folienschlauch 25 bereits gebildet. Er wird zunächst in Richtung der Schwerkraft gefördert. Diese Ausrichtung des Schlauches ist für die Verfestigung der Fügestellen 27 beziehungsweise die Verteilung des Extrudats vorteilhaft. Schließlich läuft der Schlauch 25 über die Walzen 38 und 35 zu der Aufwicklung 36, welche ebenfalls symbolhaft dargestellt ist. Im Zusammenhang mit den beschriebenen Figuren 1 bis 3 sind noch der Motor 60, der über einen nicht dargestellten Riemen Drehmoment auf den Extruder überträgt, der Lüfter 61 und das Maschinengestell 37 erwähnenswert. Auf die Darstellung anderer Halteelemente weiterer Vorrichtungsbestandteile wie Walzen oder Umlenkstangen wurde verzichtet, da die Lagerung und Halterung solcher Bauteile dem Fachmann geläufig sind. Auch andere im Pπnzip bekannte Vorrichtungsbestandteile wie die Auf- und Abwicklung sind lediglich symbolisch dargestellt.As a rule, the extrudate is applied in a heated state, so that the cooling of the extrudate leads to a firm connection of the film webs. Polyolefins can be used as extrudate. However, the use of all possible forms of adhesive or a welding of the edges of the webs should also be considered at this point. After leaving the nip 50, the film tube 25 is already formed. It is initially promoted in the direction of gravity. This orientation of the hose is advantageous for the strengthening of the joints 27 or the distribution of the extrudate. Finally, the hose 25 runs over the rollers 38 and 35 to the winding 36, which is also shown symbolically. In connection with the described FIGS. 1 to 3, the motor 60, which transmits torque to the extruder via a belt (not shown), the fan 61 and the machine frame 37 are also worth mentioning. The illustration of other holding elements of further device components such as rollers or deflecting rods has been dispensed with, since the storage and holding of such components are familiar to the person skilled in the art. Other device components known in the pnzip, such as winding and unwinding, are only shown symbolically.
Figur 5 zeigt den Querschnitt eines durch die dargestellte Vorrichtung dargestellten Sackes 25. In der Figur gezeigt sind die Bahnen A-D, die sie verbindenden Fügestellen 27 sowie die Seitenfalten 26. In der Figur 6 wird ein anderer Querschnitt eines erfindungsgemäßen Sackes dargestellt. Der in Figur 6 dargestellte erfindungsgemäße Schlauch 40 verfügt wie der Schlauch 25 über vier Fügenähte 27, die vier Bahnen M, N, O, P miteinander verbinden. Im Gegensatz zu dem Schlauch 25 verfügt der Schlauch 40 über keine Seitenfalten 26.FIG. 5 shows the cross section of a sack 25 represented by the device shown. The figure shows the webs AD, the joining points 27 connecting them and the side folds 26. Another cross section of a sack according to the invention is shown in FIG. Like the hose 25, the hose 40 according to the invention shown in FIG. 6 has four joining seams 27 which connect four webs M, N, O, P to one another. In contrast to the hose 25, the hose 40 has no side folds 26.
Abschließend sei noch einmal betont, dass sich die dargestellten' erfindungsgemäßen Schläuche auch zu anderen Endprodukten als FFS- Säcken weiten/erarbeiten lassen dürften. Insbesondere dem Seitenfaltenschlauch 25 dürften sich auch andere Einsatzfelder erschließen.Finally, it should again be emphasized is that the 'hoses invention shown also to other end-products as FFS sacks wide / are likely to be elaborate. In particular, the gusseted hose 25 should also open up other fields of application.
Erwähnenswert ist noch, dass die Figuren 5 und 6 einen Schlauch zeigen, bei dem die Fügenähte 27 ganze Folien- oder Materiallagen (A-D) miteinander verbinden. It is also worth mentioning that FIGS. 5 and 6 show a hose in which the seams 27 connect entire layers of film or material (AD) to one another.

Claims

Verfahren zur Herstellung von SäckenPatentansprüche Process for the production of sacks
1. Verfahren zur Herstellung eines Sackes (25,40) aus einem Polymer- und/oder Metallfolienmaterial, wobei der Sack (25,40) an seinem unteren Ende verschlossen ist und vier Außenwandungen (A-D) aufweist, die durch vier Nähte (27) verbunden sind dadurch gekennzeichnet, dass das zur Sackbildung notwendige Material (A-E) in Gestalt eines Folien- schlauchs (25, 40), welcher auf einer Rolle aufgewickelt ist, der Abwicklungseinrichtung einer Bodenbildungsvorrichtung zugeführt wird, welche den abgewickelten Schlauch zu Schlauchstücken vereinzelt und zumindest ein Ende des Sackes verschließt.1. A process for producing a sack (25, 40) from a polymer and / or metal foil material, the sack (25, 40) being closed at its lower end and having four outer walls (AD), which are joined by four seams (27). Connected are characterized in that the material (AE) necessary for bag formation in the form of a film tube (25, 40), which is wound on a roll, is fed to the unwinding device of a bottom forming device, which separates the unwound tube into tube pieces and at least one Closes the end of the sack.
2. Verfahren nach Anspruch 1 dadurch gekennzeichnet, dass ein Folienschlauch (25) verwendet wird, welcher bereits Seitenfalten (26) aufweist.2. The method according to claim 1, characterized in that a film tube (25) is used, which already has side folds (26).
3. Verfahren nach einem der vorstehenden Ansprüche dadurch gekennzeichnet, dass die Bodenbildung durch eine Querschweißung vorgenommen wird.3. The method according to any one of the preceding claims, characterized in that the bottom formation is carried out by a transverse weld.
4. Verfahren nach dem vorstehenden Anspruch dadurch gekennzeichnet, dass die Bodenbildung ausschließlich durch eine Abquetschung und eine Quer- schweißung erfolgt.4. The method according to the preceding claim characterized in that the bottom is formed exclusively by squeezing and cross welding.
5. Verfahren nach einem der vorstehenden Ansprüche dadurch gekennzeichnet, dass nach der Bodenbildung eine Befüllung des Sackes vorgenommen wird.5. The method according to any one of the preceding claims, characterized in that the sack is filled after the formation of the bottom.
6. Verfahren nach einem der vorstehenden Ansprüche dadurch gekennzeichnet, dass das Kopfende des Sackes ebenfalls durch eine Querschweißung verschlossen wird.6. The method according to any one of the preceding claims, characterized in that the head end of the bag is also closed by a transverse weld.
7. Verfahren nach einem der vorstehenden Ansprüche dadurch gekennzeichnet, dass das Bilden und Befüllen des Sackes zumindest teilweise an einer Form- Fill und Seal-Maschine vorgenommen wird.7. The method according to any one of the preceding claims, characterized in that the formation and filling of the sack is carried out at least partially on a form-fill and seal machine.
8. Verfahren nach einem der vorstehenden Ansprüche dadurch gekennzeichnet, dass ein Folienschlauch (25, 40) verwendet wird, bei dem zumindest ein Teil der vier Nähte des Schlauchs durch ein Fügeverfahren gebildet ist, bei dem zusätzliches Fügematerial - wie Klebstoff oder Extrudat - an die Naht (27) gebracht wurde.8. The method according to any one of the preceding claims, characterized in that a film tube (25, 40) is used, in which at least part of the four seams of the tube is formed by a joining process, in which additional joining material - such as adhesive or extrudate - to the Seam (27) was brought.
9. Verfahren nach einem der vorstehenden Ansprüche dadurch gekennzeichnet, dass ein Folienschlauch (25, 40) verwendet wird, der gebildet ist aus vier Folienbahnen (A-D), welche durch Folienzufühπtorrichtungen parallel zueinander einer Fügestelle (8) zugeführt werden.9. The method according to any one of the preceding claims, characterized in that a film tube (25, 40) is used, which is formed from four film webs (A-D), which are fed parallel to one another by a joint (8) by film feeders.
10. Verfahren nach dem vorstehenden Anspruch dadurch gekennzeichnet, dass die Förderichtung der vier Folienbahnen an der Fügestelle (8) die Längsachse des gebildeten Folienschlauchs (25, 40) definiert.10. The method according to the preceding claim, characterized in that the conveying direction of the four film webs at the joint (8) defines the longitudinal axis of the film tube (25, 40) formed.
11. Schlauchfolienwickel (36) gebildet aus einem Schlauch mit vier Seitenwandungen (A-D) die mit vier Nähten (27) miteinander verbunden sind.11. tubular film wrap (36) formed from a tube with four side walls (A-D) which are connected to each other with four seams (27).
12. Schlauchfolienwickel (36) nach Anspruch 11 dadurch gekennzeichnet, dass zwei (BC) der vier Seitenwandungen (A-D) Seitenfalten (26) aufweisen.12. tubular film roll (36) according to claim 11, characterized in that two (BC) of the four side walls (A-D) have side gussets (26).
13. Schlauchfolienwickel (36) nach Anspruch 12 dadurch gekennzeichnet, dass dass die Frontseiten (A, D) des Seitenfaltenschlauches (25) übereinander liegen.13. tubular film wrap (36) according to claim 12, characterized in that the front sides (A, D) of the gusseted tube (25) lie one above the other.
14. Schlauchfolienwickel (36) nach Anspruch 12 oder 13 dadurch gekennzeichnet, dass die Seitenfalten (26) nach in Richtung auf die Schlauchachse eingeschlagen sind. 14. tubular film wrap (36) according to claim 12 or 13, characterized in that the side folds (26) are turned in the direction of the hose axis.
EP04710870A 2003-02-14 2004-02-13 Method for the production of bags Withdrawn EP1597059A1 (en)

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DE10306615 2003-02-14
DE10306615A DE10306615B4 (en) 2003-02-14 2003-02-14 Process for the production of sacks
PCT/EP2004/002083 WO2004071752A1 (en) 2003-02-14 2004-02-13 Method for the production of bags

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US7837606B2 (en) 2010-11-23
US20060088676A1 (en) 2006-04-27
DE10306615B4 (en) 2008-06-12
JP2006517481A (en) 2006-07-27
DE10306615A1 (en) 2004-09-02
WO2004071752A1 (en) 2004-08-26
WO2004071752A8 (en) 2004-11-11

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