EP0924057B1 - Method and apparatus for making two bags simultaneously - Google Patents

Method and apparatus for making two bags simultaneously Download PDF

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Publication number
EP0924057B1
EP0924057B1 EP98114280A EP98114280A EP0924057B1 EP 0924057 B1 EP0924057 B1 EP 0924057B1 EP 98114280 A EP98114280 A EP 98114280A EP 98114280 A EP98114280 A EP 98114280A EP 0924057 B1 EP0924057 B1 EP 0924057B1
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EP
European Patent Office
Prior art keywords
film web
tubular film
bags
bag
marking
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.)
Expired - Lifetime
Application number
EP98114280A
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German (de)
French (fr)
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EP0924057A3 (en
EP0924057A2 (en
Inventor
Armin Meyer
Jakob Schneider
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.)
Lemo Maschinenbau GmbH
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Lemo Maschinenbau GmbH
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Publication of EP0924057A2 publication Critical patent/EP0924057A2/en
Publication of EP0924057A3 publication Critical patent/EP0924057A3/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • B31B70/74Auxiliary operations
    • B31B70/92Delivering
    • B31B70/98Delivering in stacks or bundles
    • B31B70/984Stacking bags on wicket pins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00Shape of flexible containers
    • B31B2160/10Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • B31B70/006Controlling; Regulating; Measuring; Safety measures
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S493/00Manufacturing container or tube from paper; or other manufacturing from a sheet or web
    • Y10S493/916Pliable container
    • Y10S493/926Pliable container having handle or suspension means

Definitions

  • the invention initially relates to a method for the simultaneous production of two bags each, in particular vending machine bags from successive ones Cross cutting and cross cutting formed double film web sections one flat-lay tubular film web made of thermoplastic plastic as well as for packets Stack the bags, the double film web sections being separated by a Direction of movement of the tubular film web extending longitudinal cut in two beforehand bags provided with receiving holes are divided by a Transfer device detected and on the spacing of the receiving holes next to each other arranged pins of a stacked moving pin stack conveyor be filed.
  • a method and a device for its implementation is in US 5,085,111.
  • EP 0701895-A describes a machine and a method for producing Plastic bags are known in which the position of a cross cutting device along Direction of movement of the film web is adjusted.
  • a detector near the cross cutter recognizes the contour of recesses in the film web and controls it depending on the position of the cutting device.
  • the invention has for its object a method for the simultaneous production of two bags each, in particular vending machine bags, made of double film web sections to propose a flat tubular film sheet made of thermoplastic material, by the manufacturing and / or setting inaccuracies of the facilities for Manufacture of the bags and / or stack of bags related disadvantages, which affect the precise location Positioning the bags and thus affect their precise stacking, so quickly be compensated for as much as possible by means of a particularly simple device trained funds.
  • this problem is solved in that the Tubular film web and the devices for producing the bags and / or the Bag stacks are automatically controlled relative to each other, the control with the exception of the unwinding area of the tubular film web, that the Tubular film web is guided correctly and the facilities for producing the Bags and / or the stack of bags with respect to a predetermined longitudinal end Marking of the tubular film web driven and opposite the tubular film web are automatically adjusted transversely to their direction of travel.
  • the Tubular film web when the position changes, the Tubular film web no longer adjusts it itself, but rather the bag-forming one controlled or stacking facilities themselves.
  • This machine control and Adjustment can be carried out much faster and more accurately than a modulation and adjustment of the tubular film web, especially if it is with comparatively high web speed is moved.
  • This simple and in particular quick adjustment of the facilities can be the usual Avoid material loss of the tubular film web and at the same time is the exact positioning for example of receiving holes in automatic bags compared to the Longitudinal cutting edge guaranteed in an optimal manner, so that the handling of Vending machine bags, for example in packaging machines, e.g. B. bread or bread slices pack, is also improved.
  • the specified marking on the tubular film web can be done in different ways and Can be achieved, for example, in that a serving as a tax mark longitudinal marking line applied to the tubular film web, preferably is printed on. This print can either already be made during the extrusion of the Tubular film web or during its subsequent assembly, i.e. when editing for Formation of bags can be applied.
  • Another option is to do without a line print entirely, rather one of the two edges or both edges of the tubular film web than to use the specified marking.
  • this can be done in terms of the device, for example achieve that the modulation via a scanning device in the form of a scanning head, for example in the area of a bottom folding device, a punching device, a slitter and optionally a strip cutter is made, that is, in all known devices that are used for the production of bags, especially vending machine bags, are necessary.
  • a bag making machine 1 is shown schematically, for simultaneous Manufacture of two bags, so-called automatic bags, trained and is set up.
  • An unwind stand 2 with a winding roll 3 is part of the machine a tubular film web 4 made of thermoplastic material.
  • the tubular film web 4 is within a processing state 5 indicated only schematically above housed drive rollers and tensioning rollers, not shown.
  • a marking line printing unit 6 is arranged, on which the Tubular film web 4 is passed and its function explained in more detail below becomes.
  • the processing stand 5 also takes a side or bottom folding insertion device 7 (see FIG. 2) and a strip cutting device 8 (see FIG. 3), the Meaning is explained in more detail below.
  • FIG. 4 Behind the processing stand 5 is one Hole punching device 9 arranged (see FIG. 4), the function of which is also shown below is described in more detail.
  • the hole punching device 9 is followed by a cross welding separating device 11 (see FIG. 5) and a transfer device 12, to which a Stacking device 13 with a pin stack conveyor 14 connects. In the area the latter is finally arranged a longitudinal cutting device 15 (see FIG. 7).
  • the bottom gusset insertion device 7 shown in FIG. 2 has in a manner known per se Side swords 16, through the formation of an air bubble inside the tubular film Side folds 17, which represent a bottom fold in the finished bag, into the Tubular film web 4 can be introduced.
  • the side swords 16 are one Not shown device transverse to the direction of movement of the tubular film web 4th adjustable. The training is such that during the run the tubular film web 4 as a function of one described in more detail below Marking an automatic control and adjustment takes place.
  • the tubular film web is in the area of the strip cutting device 8 shown in FIG 4 guided over a deflection roller 21.
  • the strip cutting device 8 has one Support rod 22, which is arranged in the left part of the processing station 5.
  • Support block 23 is adjustably fixed on the support rod 22.
  • the support block 23 supports Spacing-arranged cutting knives 24 which are arranged such that they separate a strip 25 from the top of the tubular film web 4, so that in a gap 26 is formed in the upper web. This way you can use a border create provided bags, d. H. in such bags used as vending machine bags the marginal edges delimiting the bag openings are not at the same height.
  • the hole punching device 9 shown in FIG. 4 has two adjustment drives 27, via the perforated tools 29 seated on support plates 28 can be actuated, with the aid of which Area of the gap 26 in each case two adjacent bore holes 31 in the tubular film web 4 can be introduced, the meaning below is explained in more detail.
  • Cross cut welding device 11 has a lower welding roller 32 and an upper one Welding bar 33, which is movable substantially in the vertical plane.
  • the longitudinal cutting device 15 With the help of the longitudinal cutting device 15 shown in Figure 7, the on both sides of the Pin stack conveyor 13 depending double film web section 35 in two Cut the bag packs lengthways, as shown in Figure 8. To this end the longitudinal cutting device 15 has two drive units 41 with a cutting bar 42, a cutting knife 43 attached to it, which is essentially in vertical direction can be moved up and down. The two themselves through the Longitudinal cut bag packs are shown in Figures 8 and 9 with 35 a and 35 b referred to.
  • the cutting knife is used to connect or block the individual bags in packages 43 brought to a certain temperature so that when penetrating of the cutting knife the superimposed edges of each bag stack welded together or fused.
  • Figures 10 and 11 are two different configurations of bags shown, which is generated by the method and the device according to the invention can be.
  • Figure 10 illustrates with an edge or a lip provided machine bags, in which the upper, defining the bag opening Edges are not at the same level, as seen from the removal of strip 25 Figure 3 and the resulting gap 26 results.
  • FIG. 11 illustrates the configuration of a double film web section according to perforations 44 have been created by means of a perforator (not shown). After the double film web sections along the line A into two individual bags have been separated, the edges of the bags are level because of the perforation line 44 is formed in both surfaces.
  • FIGS. 14 and 15 show a spreading device 18 which is in the region of the Pin stack conveyor 14 is arranged and about a common pivot axis 19 has pivotable spreading arms 20.
  • the spreading of the packs of bags is necessary to pack the bags on, not shown, substantially U-shaped trained wire brackets.
  • the wire brackets are hand made from below introduced what was previously not possible on two-track machines.
  • Figure 12 is shown in a schematic representation, as with the aid of a scanning device 45 and a marking line 46 on the tubular film web 4 a desired relative Alignment of the bag-forming facilities, in particular with regard to the bottom fold insertion device 7, the strip cutting device 8 and the punching device 9 is made opposite the tubular film web 4. According to that in FIG. 12 The process sequence shown is first on the underside of the tubular film web 4 with the help of the marking line printing unit 6, the marking line 46 on the underside of the Tubular film web 4 applied (see FIG. 12 a).
  • a probe 47 for example one works Photocell of the scanner 45 together, in such a way that at one Deflection the associated device, so for example the bottom folding insertion device 7 is controlled accordingly.
  • non-contact scanning head 47 each through a transmission line 49, and with the interposition of known control and amplifier units 51 with the Adjustment device connected.
  • a motor 52 of an actuator 53 and the necessary devices between probe 47 (sensor) and the servomotor 52 are directed according to the respective requirement.
  • the other devices are adjusted individually. An adjustment is made according to FIG. 12 c when cutting a strip 26 by the strip cutting device 8 and / or in the case of FIG. 12 d when the receiving bores 31 are drilled in The area of the gap 26 in the area of the punching device 9.

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Description

Die Erfindung bezieht sich zunächst auf ein Verfahren zum gleichzeitigen Herstellen von jeweils zwei Beuteln, insbesondere Automatenbeuteln aus aufeinanderfolgenden, durch Querschneiden und Quertrennen gebildeten Doppelfolienbahnabschnitten einer flachgelegten Schlauchfolienbahn aus thermoplastischem Kunststoff sowie zum paketweisen Stapeln der Beutel, wobei die Doppelfolienbahnabschnitte durch einen sich in Bewegungsrichtung der Schlauchfolienbahn erstreckenden Längstrennschnitt in zwei vorher mit Aufnahmebohrungen versehene Beutel aufgeteilt werden, die von einer Überführungseinrichtung erfaßt und auf im Abstand der Aufnahmebohrungen nebeneinander angeordneten Stiften einer paketweise bewegten Stiftstapelfördereinrichtung stapelbildend abgelegt werden. Ein derartiges Verfahren und eine Vorrichtung zu seiner Durchführung ist in der US 5,085,111 beschrieben.The invention initially relates to a method for the simultaneous production of two bags each, in particular vending machine bags from successive ones Cross cutting and cross cutting formed double film web sections one flat-lay tubular film web made of thermoplastic plastic as well as for packets Stack the bags, the double film web sections being separated by a Direction of movement of the tubular film web extending longitudinal cut in two beforehand bags provided with receiving holes are divided by a Transfer device detected and on the spacing of the receiving holes next to each other arranged pins of a stacked moving pin stack conveyor be filed. Such a method and a device for its implementation is in US 5,085,111.

Bei der Herstellung solcher Beutel, insbesondere wenn es sich dabei um Automatenbeutel handelt, ist es wegen der paßgenauen Aufnahme im Abpackautomat besonders wichtig, daß bei den Beuteln die Lage der Aufnahmebohrungen genau positioniert ist. Ist dies nicht der Fall, so ist es nicht möglich, lagegenaue Beutel im Packen abzustapeln, da die Aufnahmebohrungen in der Schlauchfolienbahn und die Stifte der Stiftstapelfördereinrichtung nicht hinreichend genau aufeinander abgestimmt sind. Dies führt bei der Stapelbildung zu unerwünschten Funktionsstörungen bzw. zu der Notwendigkeit, die Beutelherstelleinrichtungen und/oder die Stiftstapelfördereinrichtungen langsamer laufen zu lassen.In the manufacture of such bags, especially if they are machine bags , it is particularly important because of the precise fit in the packaging machine that the position of the location holes on the bags is precisely positioned. If not In this case, it is not possible to stack exact bags in the pack, because the Receiving holes in the tubular film web and the pins of the pin stack conveyor are not sufficiently coordinated. This leads to stack formation undesirable malfunctions or the need for the bag making facilities and / or to let the pen stack conveyors run more slowly.

Neben der exakten Anordnung der Aufnahmebohrungen wirken sich auch Bahnbreitenschwankungen der Schlauchfolienbahn auf die Fertigungstoleranzen negativ aus. In addition to the exact arrangement of the mounting holes, there are also effects Web width fluctuations of the tubular film web negatively affect the manufacturing tolerances out.

Aus der EP 0701895-A ist eine Maschine und ein Verfahren zur Herstellung von Kunststoffbeuteln bekannt, bei der die Position einer Querschneide-Einrichtung längs zur Laufrichtung der Folienbahn verstellt wird. Ein Detektor in der Nähe der Querschneideeinrichtung erkennt die Kontur von Aussparungen in der Folienbahn und steuert davon abhängig die Position der Schneideinrichtung.EP 0701895-A describes a machine and a method for producing Plastic bags are known in which the position of a cross cutting device along Direction of movement of the film web is adjusted. A detector near the cross cutter recognizes the contour of recesses in the film web and controls it depending on the position of the cutting device.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum gleichzeitigen Herstellen von jeweils zwei Beuteln, insbesondere Automatenbeuteln, aus Doppelfolienbahnabschnitten einer flachgelegten Schlauchfolienbahn aus thermoplastischem Kunststoff vorzuschlagen, durch das durch Fertigungs- und/oder Einstellungsungenauigkeiten der Einrichtungen zur Herstellung der Beutel und/oder Beutelstapel bedingte Nachteile, die sich auf die lagegenaue Positionierung der Beutel und damit auf deren präzise Stapelbildung auswirken, so schnell wie möglich ausgeglichen werden und zwar durch vorrichtungsmäßig besonders einfach ausgebildete Mittel.The invention has for its object a method for the simultaneous production of two bags each, in particular vending machine bags, made of double film web sections to propose a flat tubular film sheet made of thermoplastic material, by the manufacturing and / or setting inaccuracies of the facilities for Manufacture of the bags and / or stack of bags related disadvantages, which affect the precise location Positioning the bags and thus affect their precise stacking, so quickly be compensated for as much as possible by means of a particularly simple device trained funds.

In verfahrensmäßiger Hinsicht wird diese Aufgabe dadurch gelöst, daß die Schlauchfolienbahn und die Einrichtungen zur Herstellung der Beutel und/oder der Beutelstapel automatisch relativ zueinander ausgesteuert werden, wobei die Aussteuerung mit Ausnahme des Abwickelbereichs der Schlauchfolienbahn dadurch erfolgt, daß die Schlauchfolienbahn positionsgerecht geführt wird und die Einrichtungen zur Herstellung der Beutel und/oder der Beutelstapel in bezug auf eine vorgegebene längsverlaufende Markierung der Schlauchfolienbahn angesteuert und gegenüber der Schlauchfolienbahn selbsttätig quer zu deren Laufrichtung verstellt werden.In procedural terms, this problem is solved in that the Tubular film web and the devices for producing the bags and / or the Bag stacks are automatically controlled relative to each other, the control with the exception of the unwinding area of the tubular film web, that the Tubular film web is guided correctly and the facilities for producing the Bags and / or the stack of bags with respect to a predetermined longitudinal end Marking of the tubular film web driven and opposite the tubular film web are automatically adjusted transversely to their direction of travel.

Nach der erfindungsgemäßen Lösung wird bei einer Lageveränderung der Schlauchfolienbahn diese nicht mehr selbst verstellt, sondern vielmehr die beutelbildenden bzw. -stapelnden Einrichtungen selbst angesteuert. Diese maschinelle Ansteuerung und Verstellung läßt sich wesentlich schneller und genauer durchführen als eine Aussteuerung und Verstellung der Schlauchfolienbahn, insbesondere dann, wenn diese mit vergleichsweise hoher Bahngeschwindigkeit bewegt wird. Durch diese einfache und inbesondere schnelle Verstellung der Einrichtungen läßt sich der sonst übliche Materialverlust der Schlauchfolienbahn vermeiden und zugleich ist die exakte Positionierung beispielsweise von Aufnahmebohrungen bei Automatenbeuteln gegenüber der Längsschnittkante in optimaler Weise gewährleistet, so daß die Handhabung von Automatenbeuteln beispielsweise in Verpackungsautomaten um z. B. Brot oder Brotscheiben abzupacken, ebenfalls verbessert wird.According to the solution according to the invention, when the position changes, the Tubular film web no longer adjusts it itself, but rather the bag-forming one controlled or stacking facilities themselves. This machine control and Adjustment can be carried out much faster and more accurately than a modulation and adjustment of the tubular film web, especially if it is with comparatively high web speed is moved. Through this simple and in particular quick adjustment of the facilities can be the usual Avoid material loss of the tubular film web and at the same time is the exact positioning for example of receiving holes in automatic bags compared to the Longitudinal cutting edge guaranteed in an optimal manner, so that the handling of Vending machine bags, for example in packaging machines, e.g. B. bread or bread slices pack, is also improved.

Die vorgegebene Markierung an der Schlauchfolienbahn kann auf verschiedene Art und Weise erreicht werden, beispielsweise dadurch, daß eine als Steuermarkierung dienende längsverlaufende Markierungslinie auf die Schlauchfolienbahn aufgebracht, vorzugsweise aufgedruckt wird. Dieser Aufdruck kann entweder bereits bei der Extrudierung der Schlauchfolienbahn oder bei deren späteren Konfektionierung, d.h. bei der Bearbeitung zur Bildung von Beuteln aufgebracht werden. The specified marking on the tubular film web can be done in different ways and Can be achieved, for example, in that a serving as a tax mark longitudinal marking line applied to the tubular film web, preferably is printed on. This print can either already be made during the extrusion of the Tubular film web or during its subsequent assembly, i.e. when editing for Formation of bags can be applied.

Eine andere Möglichkeit besteht darin, ganz auf einen Linienaufdruck zu verzichten, vielmehr eine der beiden Kanten oder beide Kanten der Schlauchfolienbahn als vorgegebene Markierung zu verwenden.Another option is to do without a line print entirely, rather one of the two edges or both edges of the tubular film web than to use the specified marking.

Unabhängig davon, ob es sich nun um eine Linienabtastung oder aber um eine übliche Kantenabtastung handelt, ist es von besonderem Vorteil, wenn die Aussteuerung der Einrichtungen, die zur Beutelbildung notwendig sind, während des zeitlichen Ablaufs der Beutelherstellung bei Bedarf mehrmals erfolgt. Mit anderen Worten bedeutet dies, daß die Abtastung und die nachfolgende Aussteuerung erforderlichenfalls jeweils im Bereich der einzelnen Beutelbildungseinrichtungen vorgenommen wird.Regardless of whether it is a line scan or a conventional one Edge scanning, it is particularly advantageous if the modulation of the Equipment necessary for bag formation during the Bag production takes place several times if necessary. With others Words this means that the sampling and the subsequent modulation if necessary, each in the area of the individual bag-forming devices is made.

Bei einer konkreten Ausführung läßt sich dies vorrichtungsmäßig beispielsweise dadurch erreichen, daß die Aussteuerung über eine Abtasteinrichtung in Form eines Abtastkopfes, beispielsweise im Bereich einer Bodenfalteinrichtung, einer Lochstanzeinrichtung, einer Längsschneideinrichtung und gegebenenfalls einer Streifenschneideinrichtung vorgenommen wird, also bei allen an sich bekannten Einrichtungen, die zur Herstellung von Beuteln, insbesondere Automatenbeuteln, notwendig sind.In the case of a specific embodiment, this can be done in terms of the device, for example achieve that the modulation via a scanning device in the form of a scanning head, for example in the area of a bottom folding device, a punching device, a slitter and optionally a strip cutter is made, that is, in all known devices that are used for the production of bags, especially vending machine bags, are necessary.

Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert. Es zeigen in jeweils schematischer Darstellung:

Figur 1
eine Seitenansicht einer Beutelherstellmaschine,
Figur 2
eine Seiten- bzw. Bodenfalten bildende Einrichtung,
Figur 3
eine vergrößerte perspektivische Darstellung einer Streifenschneideinrichtung,
Figur 4
eine perspektivische Darstellung einer Lochstanzeinrichtung,
Figur 5
eine perspektivische Darstellung einer Querschweißtrenneinrichtung zur Bildung von Bahnabschnitten,
Figur 6
eine perspektivische Darstellung einer Bahnüberführungseinrichtung mit einem Teil einer Stapelvorrichtung,
Figur 7
eine perspektivische Darstellung eines Teils der Stapelvorrichtung im Bereich einer Längsschneideinrichtung,
Figur 8
eine perspektivische Darstellung der Stapeleinrichtung nach Trennen der Bahnabschnitte durch die Längsschneideinrichtung zur gleichzeitigen Bildung von zwei Beuteln bzw. Beutelpacken,
Figur 9
eine Vorderansicht der in Figur 8 dargestellten Einrichtung,
Figur 10
eine Aufsicht auf eine erste Ausführungsform eines Doppelfolienbahnabschnitts,
Figur 11
eine abgewandelte Ausführungsform eines Doppelfolienbahnabschnitts,
Figur 12
einen schematischen Verfahrensablauf bei der Konfektionierung mit einer Linienabtastung,
Figur 13
einen entsprechenden schematischen Verfahrensablauf mit einer Kantenabtastung und
Figur 14 und 15
eine Einzelheit der Stapelvorrichtung.
A preferred embodiment of the invention is shown in the drawing and is explained in more detail below. Each shows in a schematic representation:
Figure 1
a side view of a bag making machine,
Figure 2
a device forming side or bottom folds,
Figure 3
2 shows an enlarged perspective illustration of a strip cutting device,
Figure 4
2 shows a perspective illustration of a hole punching device,
Figure 5
1 shows a perspective illustration of a cross welding separating device for forming web sections,
Figure 6
1 shows a perspective illustration of a web transfer device with part of a stacking device,
Figure 7
2 shows a perspective illustration of a part of the stacking device in the region of a longitudinal cutting device,
Figure 8
2 shows a perspective illustration of the stacking device after the web sections have been separated by the slitting device for the simultaneous formation of two bags or bag packs,
Figure 9
6 shows a front view of the device shown in FIG. 8,
Figure 10
a plan view of a first embodiment of a double film web section,
Figure 11
a modified embodiment of a double film web section,
Figure 12
a schematic process flow in the assembly with a line scanning,
Figure 13
a corresponding schematic procedure with an edge scan and
Figures 14 and 15
a detail of the stacking device.

In Figur 1 ist eine Beutelherstellmaschine 1 schematisch dargestellt, die zum gleichzeitigen Herstellen von jeweils zwei Beuteln, sogenannten Automatenbeuteln, ausgebildet und eingerichtet ist. Zur Maschine gehört ein Abwickelstand 2 mit einer Wickelrolle 3 aus einer Schlauchfolienbahn 4 aus thermoplastischem Kunststoff. Die Schlauchfolienbahn 4 ist innerhalb eines nur schematisch angedeuteten Bearbeitungsstandes 5 über darin untergebrachte, nicht dargestellte Antriebswalzen und Spannwalzen geführt. Am Bearbeitungsstand 5 ist ein Markierungsliniendruckwerk 6 angeordnet, an dem die Schlauchfolienbahn 4 vorbeigeführt ist und dessen Funktion weiter unten näher erläutert wird. Der Bearbeitungsstand 5 nimmt ferner eine Seiten- bzw. Bodenfalteinlegevorrichtung 7 (s. Figur 2) sowie eine Streifenschneideinrichtung 8 (s. Figur 3) auf, deren Bedeutung weiter unten näher erläutert wird. Hinter dem Bearbeitungsstand 5 ist eine Lochstanzeinrichtung 9 angeordnet (s. Figur 4), deren Funktion ebenfalls weiter unten näher beschrieben ist. Der Lochstanzeinrichtung 9 folgt eine Querschweißtrenneinrichtung 11 (s. Figur 5) sowie eine Überführungseinrichtung 12, an die sich schließlich eine Stapelvorrichtung 13 mit einer Stiftstapelfördereinrichtung 14 anschließt. Im Bereich letzterer ist schließlich eine Längsschneideinrichtung 15 (s. Figur 7) angeordnet.In Figure 1, a bag making machine 1 is shown schematically, for simultaneous Manufacture of two bags, so-called automatic bags, trained and is set up. An unwind stand 2 with a winding roll 3 is part of the machine a tubular film web 4 made of thermoplastic material. The tubular film web 4 is within a processing state 5 indicated only schematically above housed drive rollers and tensioning rollers, not shown. At the Processing stand 5, a marking line printing unit 6 is arranged, on which the Tubular film web 4 is passed and its function explained in more detail below becomes. The processing stand 5 also takes a side or bottom folding insertion device 7 (see FIG. 2) and a strip cutting device 8 (see FIG. 3), the Meaning is explained in more detail below. Behind the processing stand 5 is one Hole punching device 9 arranged (see FIG. 4), the function of which is also shown below is described in more detail. The hole punching device 9 is followed by a cross welding separating device 11 (see FIG. 5) and a transfer device 12, to which a Stacking device 13 with a pin stack conveyor 14 connects. In the area the latter is finally arranged a longitudinal cutting device 15 (see FIG. 7).

Die in Figur 2 gezeigte Bodenfalteneinlegevorrichtung 7 weist in an sich bekannter Weise Seitenschwerter 16 auf, durch die nach Bildung einer Luftblase im Inneren der Schlauchfolie Seitenfalten 17, die beim fertigen Beutel eine Bodenfalte darstellen, in die Schlauchfolienbahn 4 eingebracht werden können. Die Seitenschwerter 16 sind über eine nicht dargestellte Einrichtung quer zur Bewegungsrichtung der Schlauchfolienbahn 4 verstellbar ausgebildet. Die Ausbildung ist dabei derart getroffen, daß während des Laufs der Schlauchfolienbahn 4 in Abhängigkeit von einer unten weiter näher beschriebenen Markierung eine selbsttätige Ansteuerung und Verstellung erfolgt.The bottom gusset insertion device 7 shown in FIG. 2 has in a manner known per se Side swords 16, through the formation of an air bubble inside the tubular film Side folds 17, which represent a bottom fold in the finished bag, into the Tubular film web 4 can be introduced. The side swords 16 are one Not shown device transverse to the direction of movement of the tubular film web 4th adjustable. The training is such that during the run the tubular film web 4 as a function of one described in more detail below Marking an automatic control and adjustment takes place.

Im Bereich der in Figur 3 gezeigten Streifenschneideinrichtung 8 ist die Schlauchfolienbahn 4 über eine Umlenkwalze 21 geführt. Die Streifenschneideinrichtung 8 weist eine Tragstange 22 auf, die im linken Teil der Verarbeitungsstation 5 angeordnet ist. Ein Tragblock 23 ist auf dem Tragstab 22 einstellbar fixiert. Der Tragblock 23 trägt mit Abstand zueinander angeordnete Schneidmesser 24, die derart angeordnet sind, daß sie einen Streifen 25 aus der Oberseite der Schlauchfolienbahn 4 heraustrennen, so daß in der Oberbahn ein Spalt 26 entsteht. Auf diese Weise lassen sich mit einem Rand versehene Beutel erzeugen, d. h. bei solchen als Automatenbeutel eingesetzten Beutel liegen die die Beutelöffnungen begrenzenden Randkanten nicht auf gleicher Höhe.The tubular film web is in the area of the strip cutting device 8 shown in FIG 4 guided over a deflection roller 21. The strip cutting device 8 has one Support rod 22, which is arranged in the left part of the processing station 5. On Support block 23 is adjustably fixed on the support rod 22. The support block 23 supports Spacing-arranged cutting knives 24 which are arranged such that they separate a strip 25 from the top of the tubular film web 4, so that in a gap 26 is formed in the upper web. This way you can use a border create provided bags, d. H. in such bags used as vending machine bags the marginal edges delimiting the bag openings are not at the same height.

Die in Figur 4 gezeigte Lochstanzeinrichtung 9 weist zwei Verstellantriebe 27 auf, über die an Tragplatten 28 sitzende Lochwerkzeuge 29 betätigbar sind, mit deren Hilfe im Bereich des Spaltes 26 jeweils zwei nebeneinanderliegende Aufnahmebohrungen 31 in die Schlauchfolienbahn 4 eingebracht werden können, deren Bedeutung weiter unten näher erläutert wird.The hole punching device 9 shown in FIG. 4 has two adjustment drives 27, via the perforated tools 29 seated on support plates 28 can be actuated, with the aid of which Area of the gap 26 in each case two adjacent bore holes 31 in the tubular film web 4 can be introduced, the meaning below is explained in more detail.

Nach dem Stanzen der Aufnahmebohrungen 31 erfolgt gemäß Figur 5 das Abschweißen von Doppelfolienbahnabschnitten 35 mittels der Querschweißtrenneinrichtung 11. Die Quertrennschweißeinrichtung 11 weist eine untere Schweißwalze 32 und einen oberen Schweißbalken 33 auf, der im wesentlichen in vertikaler Ebene bewegbar ist. Durch Aktivieren der Trennschweißeinrichtung 11 bei stillstehender Schlauchfolienbahn 4 ergeben sich Trennschweißnähte 34, die zu den individuellen Doppelfolienbahnabschnitten 35 führen. After punching the receiving bores 31, welding is carried out according to FIG of double film web sections 35 by means of the cross seal separating device 11 Cross cut welding device 11 has a lower welding roller 32 and an upper one Welding bar 33, which is movable substantially in the vertical plane. By Activation of the separating welding device 11 when the tubular film web 4 is at a standstill there are separating weld seams 34 which lead to the individual double film web sections 35 lead.

Gemäß Figur 6 werden diese Doppelfolienbahnabschnitte von einer Überführungseinrichtung 12 übernommen, die zu diesem Zweck sich radial erstreckende Arme 36 aufweist, die über ein Lagerstück 37 von einer Umlaufwelle 38 umlaufend angetrieben werden. Mit Hilfe dieser Überführungseinrichtung 12 lassen sich die Doppelfolienbahnabschnitte 35 nach um 180° erfolgender Drehung auf der Stapeleinrichtung 13 ablegen, die in Figur 6 nur teilweise dargestellt ist. Diese Stapelvorrichtung 13 weist die Stiftstapelfördereinrichtung 14 auf, deren paarweise nach oben vorstehenden Stifte 39 entsprechend dem Abstand der Aufnahmebohrungen 31 in den Doppelfolienbahnabschnitten 35 angeordnet sind. Auf diese Weise lassen sich Doppelfolienbahnabschnitte in an sich bekannter Weise stapelweise auf der Stiftstapelfördereinrichtung 14 ablegen.According to Figure 6, these double film web sections from a transfer device 12 taken over, for this purpose radially extending arms 36 has, which is driven by a rotating shaft 38 rotating about a bearing piece 37 become. With the aid of this transfer device 12, the double film web sections can be 35 after rotating through 180 °, place on the stacking device 13, which is only partially shown in FIG. This stacking device 13 has the pin stack conveyor 14, whose pins 39 projecting upwards in pairs corresponding to the distance between the receiving bores 31 in the double film web sections 35 are arranged. In this way, double film web sections can be Place in stacks on the pin stack conveyor 14 in a manner known per se.

Mit Hilfe der in Figur 7 gezeigten Längsschneideinrichtung 15 läßt sich der beidseitig der Stiftstapelfördereinrichtung 13 herabhängende Doppelfolienbahnabschnitt 35 in zwei Beutelpacken längstrennen, so wie das aus Figur 8 ersichtlich ist. Zu diesem Zweck besitzt die Längsschneideinrichtung 15 zwei Antriebseinheiten 41 mit einem Schneidbalken 42, einem daran befestigten Schneidmesser 43, welches im wesentlichen in vertikaler Richtung auf- und abbewegt werden kann. Die beiden sich durch den Längstrennschnitt ergebenden Beutelpacken sind in den Figuren 8 und 9 mit 35 a und 35 b bezeichnet.With the help of the longitudinal cutting device 15 shown in Figure 7, the on both sides of the Pin stack conveyor 13 depending double film web section 35 in two Cut the bag packs lengthways, as shown in Figure 8. To this end the longitudinal cutting device 15 has two drive units 41 with a cutting bar 42, a cutting knife 43 attached to it, which is essentially in vertical direction can be moved up and down. The two themselves through the Longitudinal cut bag packs are shown in Figures 8 and 9 with 35 a and 35 b referred to.

Um die Einzelbeutel paketweise zu verbinden bzw. zu verblocken, wird das Schneidmesser 43 auf eine bestimmte Temperatur gebracht, so daß bei dem Hindurchdringen des Schneidmessers die übereinanderliegenden Ränder eines jeden Beutelstapels zusammengeschweißt oder verschmolzen werden.The cutting knife is used to connect or block the individual bags in packages 43 brought to a certain temperature so that when penetrating of the cutting knife the superimposed edges of each bag stack welded together or fused.

In den Figuren 10 und 11 sind zwei verschiedene Konfigurationen von Beuteln dargestellt, die durch das Verfahren und die Vorrichtung gemäß der Erfindung erzeugt werden können. Die Figur 10 veranschaulicht mit einem Rand oder einer Lippe versehene Automatenbeutel, bei denen die oberen, die Beutelöffnung festlegenden Ränder nicht auf gleicher Höhe liegen, was aus der Entfernung des Streifens 25 gemäß Figur 3 und den dadurch erzeugten Spalt 26 resultiert.Figures 10 and 11 are two different configurations of bags shown, which is generated by the method and the device according to the invention can be. Figure 10 illustrates with an edge or a lip provided machine bags, in which the upper, defining the bag opening Edges are not at the same level, as seen from the removal of strip 25 Figure 3 and the resulting gap 26 results.

Die Figur 11 veranschaulicht die Konfiguration eines Doppelfolienbahnabschnitts, nach dem Mittels eines nicht dargestellten Perforators Perforationen 44 erzeugt worden sind. Nachdem die Doppelfolienbahnabschnitte längs der Linie A in zwei einzelne Beutel getrennt worden sind, sind die Ränder der Beutel auf gleicher Höhe, weil die Perforationslinie 44 in beiden Flächen ausgebildet ist. FIG. 11 illustrates the configuration of a double film web section according to perforations 44 have been created by means of a perforator (not shown). After the double film web sections along the line A into two individual bags have been separated, the edges of the bags are level because of the perforation line 44 is formed in both surfaces.

In den Figuren 14 und 15 ist eine Spreizeinrichtung 18 dargestellt, die im Bereich der Stiftstapelfördereinrichtung 14 angeordnet ist und um eine gemeinsame Schwenkachse 19 schwenkbare Spreizarme 20 aufweist. Das Abspreizen der Beutelpacken ist notwendig, um die Beutelpacken auf nicht dargestellten, im wesentlichen U-förmig ausgebildeten Drahtbügeln aufzunehmen. Die Drahtbügel werden von Hand von unten eingeführt, was bisher auf zweibahnigen Maschinen nicht möglich war.FIGS. 14 and 15 show a spreading device 18 which is in the region of the Pin stack conveyor 14 is arranged and about a common pivot axis 19 has pivotable spreading arms 20. The spreading of the packs of bags is necessary to pack the bags on, not shown, substantially U-shaped trained wire brackets. The wire brackets are hand made from below introduced what was previously not possible on two-track machines.

In Figur 12 ist in schematischer Darstellung gezeigt, wie mit Hilfe einer Abtasteinrichtung 45 und einer Markierungslinie 46 auf der Schlauchfolienbahn 4 eine gewünschte relative Ausrichtung der beutelbildenden Einrichtungen, insbesondere bezüglich der Bodenfalteinlegevorrichtung 7, der Streifenschneideinrichtung 8 und der Lochstanzeinrichtung 9 gegenüber der Schlauchfolienbahn 4 vorgenommen wird. Gemäß dem in Figur 12 gezeigten Verfahrensablauf wird zunächst auf der Unterseite der Schlauchfolienbahn 4 mit Hilfe des Markierliniendruckwerkes 6 die Markierlinie 46 auf die Unterseite der Schlauchfolienbahn 4 aufgebracht (s. Figur 12 a).In Figure 12 is shown in a schematic representation, as with the aid of a scanning device 45 and a marking line 46 on the tubular film web 4 a desired relative Alignment of the bag-forming facilities, in particular with regard to the bottom fold insertion device 7, the strip cutting device 8 and the punching device 9 is made opposite the tubular film web 4. According to that in FIG. 12 The process sequence shown is first on the underside of the tubular film web 4 with the help of the marking line printing unit 6, the marking line 46 on the underside of the Tubular film web 4 applied (see FIG. 12 a).

Im Zusammenwirken mit dieser Markierungslinie 46, die beispielsweise auf die Schlauchfolienbahn 4 aufgedruckt wird, arbeitet ein Tastkopf 47, beispielsweise eine Fotozelle der Abtastvorrichtung 45 zusammen und zwar in der Weise, daß bei einer Auslenkung die zugeordnete Einrichtung, also beispielsweise die Bodenfalteinlegevorrichtung 7 entsprechend angesteuert wird. Zu diesem Zweck ist gemäß Figur 12 b der berührungslos arbeitende Abtastkopf 47 jeweils durch eine Übertragungsleitung 49, und unter Zwischenschaltung an sich bekannter Regel- und Verstärkereinheiten 51 mit der Verstelleinrichtung verbunden. Jeweils ein Motor 52 eines Stellantriebs 53 sowie die notwendigen Geräte zwischen Tastkopf 47 (Fühler) und dem Stellmotor 52 richten sich nach dem jeweiligen Erfordernis. Als kontinuierlich arbeitendes Regelsystem gibt jeder Fühler gesondert Befehl.In cooperation with this marking line 46, for example on the Tubular film web 4 is printed, a probe 47, for example one works Photocell of the scanner 45 together, in such a way that at one Deflection the associated device, so for example the bottom folding insertion device 7 is controlled accordingly. For this purpose, according to FIG. 12 b non-contact scanning head 47 each through a transmission line 49, and with the interposition of known control and amplifier units 51 with the Adjustment device connected. In each case a motor 52 of an actuator 53 and the necessary devices between probe 47 (sensor) and the servomotor 52 are directed according to the respective requirement. As a continuously working control system everyone gives Sensor separate command.

Die übrigen Einrichtungen werden also einzeln verstellt. Eine Verstellung erfolgt gemäß Figur 12 c beim Schneiden eines Streifens 26 durch die Streifenschneideinrichtung 8 und/oder im Falle der Figur 12 d beim Einbringen der Aufnahmebohrungen 31 im Bereich des Spaltes 26 im Bereich der Lochstanzeinrichtung 9.The other devices are adjusted individually. An adjustment is made according to FIG. 12 c when cutting a strip 26 by the strip cutting device 8 and / or in the case of FIG. 12 d when the receiving bores 31 are drilled in The area of the gap 26 in the area of the punching device 9.

Anstatt eine aufgebrachte Markierungslinie 46 abzutasten, ist es gemäß Figur 13 auch denkbar, die Abtastung und Aussteuerung anhand der längs verlaufenden Kanten 48 der Schlauchfolienbahn 4 vorzunehmen, wie das an sich bekannt ist. Für die Erfindung ist jedoch charakteristisch, daß nicht der Lauf der Schlauchfolienbahn 4 korrigiert wird, sondern wiederum die entsprechenden Einrichtungen, wie also z. B. die Bodenfalteinlegevorrichtung 7, die Streifenschneideinrichtung 8 und die Lochstanzeinrichtung 9. Nicht dargestellt, aber jedoch in gleicher Weise lassen sich die stapelbildenden Einrichtungen, wie z. B. die Stiftstapelfördereinrichtung 13 verstellen.Instead of scanning an applied marking line 46, it is also according to FIG. 13 conceivable, the scanning and modulation on the basis of the longitudinal edges 48 to make the tubular film web 4, as is known per se. For the invention is characteristic, however, that the run of the tubular film web 4 is not corrected, but again the appropriate facilities, such as B. the bottom folding insert 7, the strip cutting device 8 and the punching device 9. Not shown, but in the same way, the stack-forming devices, such as z. B. adjust the pin stack conveyor 13.

Claims (11)

  1. Method of simultaneously producing in each case two bags, in particular vending-machine bags, from successive double film web sections, formed by transverse welding and transverse severing, of a laid-flat tubular film web (4,) made of thermoplastic material, and of stacking the bags in groups, it being the case that the double film web sections (35) are divided up, by a longitudinal severing cut extending in the movement direction of the tubular film web (4), into two bags which have previously been provided with accommodating bores (31), are gripped by a transfer device (12) and are set down, in a stack-forming manner, on pins (39) which are arranged one beside the other at the spacing of the accommodation bores (31) and belong to a wicket conveyor (14) which moves in keeping with the groups, characterized in that the tubular film web (4) and the devices for producing the bags and/or the bag stacks (35a, 35b) are automatically compensated for relative to one another, the compensation, with the exception of the unwinding region of the tubular film web (4), taking place such that the tubular film web (4) is guided in the appropriate position and the devices for producing the bags and/or the bag stacks (35a, 35b) are activated in relation to a predetermined longitudinally running marking (46, 48) of the tubular film web (4) and are adjusted automatically in relation to the tubular film web (4), transversely to the running direction thereof.
  2. Method according to Claim 1, characterized in that a longitudinally running marking line (46) serving as a control marking is applied to, preferably printed onto, the tubular film web (4).
  3. Method according to Claim 2, characterized in that the marking line (46) is applied to the tubular film web (4) during extrusion or fabrication.
  4. Method according to Claim 1, characterized in that the marking line (46) is applied to the underside of the tubular film web (4).
  5. Method according to Claim 1, characterized in that the predetermined marking on the tubular film web (4) is formed by the longitudinally running edges (48) of the latter.
  6. Method according to one or more of Claims 1 to 5, characterized in that sensing of the marking line (46) or of the edges (48) of the tubular film web (4) and activation of the devices for producing the bags and/or the bag stacks (35a, 35b) take place a number of times, as required, during the bag-production period.
  7. Method according to Claim 6, characterized in that the sensing and the subsequent activation are carried out, if necessary, in each case in the region of the individual devices for producing the bags and/or bag stacks (35a, 35b).
  8. Method according to one or more of Claims 1 to 7, characterized in that the double film web sections (35) can be spread apart in the stacking region by a spreading device, in order for it to be possible for wire brackets to be introduced from beneath.
  9. Apparatus for implementing the method according to one of Claims 1 to 8, having devices for producing the bags and/or the bag stacks (35a, 35b), namely a bottom-folding device (7), a hole-punching device (9), a transverse welding/severing device (11), a transfer device (12), a wicket conveyor (14), a longitudinal cutting device (15) and, if appropriate, a strip-cutting device (8), characterized by a sensing device (45) and a compensating and adjusting device which is coupled thereto, the compensating and adjusting device being in operative connection with at least one of the devices for producing the bags and/or bag stacks (35a, 35b), with the result that the bag-forming or bag-stacking devices can be aligned relative to the longitudinally running marking (46, 48) of the tubular film web.
  10. Apparatus according to Claim 9, characterized in that in each case one sensing device (45) and one activating and adjusting device which is coupled thereto are arranged at least in the region of the bottom-folding means (7), of the hole-punching device (9) and, if appropriate, of the strip-cutting device (8).
  11. Apparatus according to Claim 10, characterized in that the sensing device (45) has at least one sensing head (47) which responds to a marking line (46), applied to the tubular film web (4) by a marking-line printer (6), or to the longitudinally running edges (48) of the tubular film web (4).
EP98114280A 1997-11-24 1998-07-30 Method and apparatus for making two bags simultaneously Expired - Lifetime EP0924057B1 (en)

Applications Claiming Priority (2)

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DE19751798 1997-11-24
DE19751798A DE19751798A1 (en) 1997-11-24 1997-11-24 Automatic bag-producing process for making two bags simultaneously

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EP0924057A2 EP0924057A2 (en) 1999-06-23
EP0924057A3 EP0924057A3 (en) 2001-03-07
EP0924057B1 true EP0924057B1 (en) 2004-05-26

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EP (1) EP0924057B1 (en)
DE (2) DE19751798A1 (en)
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NO (1) NO983968L (en)

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DE59811463D1 (en) 2004-07-01
DE19751798A1 (en) 1999-05-27
US6149565A (en) 2000-11-21
EP0924057A3 (en) 2001-03-07
DK0924057T3 (en) 2004-08-09
NO983968L (en) 1999-05-25
ES2221966T3 (en) 2005-01-16
NO983968D0 (en) 1998-08-28
EP0924057A2 (en) 1999-06-23

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