EP0215269A1 - Device for the production of bags - Google Patents

Device for the production of bags Download PDF

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Publication number
EP0215269A1
EP0215269A1 EP86110779A EP86110779A EP0215269A1 EP 0215269 A1 EP0215269 A1 EP 0215269A1 EP 86110779 A EP86110779 A EP 86110779A EP 86110779 A EP86110779 A EP 86110779A EP 0215269 A1 EP0215269 A1 EP 0215269A1
Authority
EP
European Patent Office
Prior art keywords
welding
web
welding bar
bar
knife
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86110779A
Other languages
German (de)
French (fr)
Other versions
EP0215269B1 (en
Inventor
Fritz Ing. Grad. Achelpohl
Helmut Simon
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 EP0215269A1 publication Critical patent/EP0215269A1/en
Application granted granted Critical
Publication of EP0215269B1 publication Critical patent/EP0215269B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y10T156/1313—Cutting element simultaneously bonds [e.g., cut seaming]
    • 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
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8822—Edge-to-edge of sheet or web [e.g., traveling cutter]

Definitions

  • the invention relates to a device for producing bags from a double-layer web of thermoplastic material with the web intermittently by a bag length between welding jaws, of which the upper one is provided with a lifting and lowering drive, feed rollers and one below the web and parallel to the lower welding bar next to this guided cutting knife, which is attached to an endless traction device running over rollers and in the cutting area of which the web can be pressed down by the upper welding bar.
  • the lower welding bar is also movably supported and can be pressed down into the cutting plane by spring force, which makes additional guide means for the lower welding bar necessary.
  • the object of the invention is therefore to provide a device of the type specified in the introduction, in which the lower welding bar can also be held fixed to the frame without a collision of the web with the cutting knife being possible outside the welding cycles.
  • this object is achieved in that, for feeding the web, the preferred rollers arranged directly in front of the welding bars are provided in rows of rows of comb-like upper and lower guide rods or blow air tubes which pass through in annular grooves and between them the web lies between the opened welding bars in an area above the knife path Pass through the plane, that the lower welding bar is fixed to the frame and that continuously rotating knives pass through the plane of the web defined by the lower welding bar during the execution of the transverse weld seam and that the lower row of guide rods or blow air tubes are provided pivoting devices in the direction of the lower welding bar, which are operated simultaneously with the lowering of the upper welding bar.
  • the rows of guide rods or blow air tubes which serve to guide the web prevent the cross-guided knife from damaging the web outside the welding cycles, during which the welding bars are lifted apart.
  • the upper welding bar presses the web into the cutting plane, so that the knife guided across the web clamps the web clamped between the welding bars can cut across.
  • a sharp-edged pulling off of the web over the lower row of guide rods or blow air tubes is avoided by pivoting it towards the lower welding bar during the welding cycle. This avoids damage to the web or grooves pressed into it.
  • the knife which is preferably attached to a toothed belt or a chain, is driven relative to the drive performing the welding cycles in such a way that the cutting knife is located outside the upper run of the traction means during the lowering of the upper welding bar, so that the cutting knife cannot engage the web, so as long as it is not stuck between the welding bars.
  • Clamping or second welding bars parallel to the welding bars can also be provided, between which the knife path runs, the lower clamping or second welding bar lying in the plane of the lower welding bar.
  • the cross-cut is carried out on a narrow path section which lies between two welding bars or between a welding bar and a pair of clamping bars.
  • the upper run of the traction means is supported on a convexly curved support or a convexly curved slide or roller track, so that the knife executes a transverse movement relative to the plane of the track.
  • a lever can be pivoted by a rocker and pivoted by a cam or eccentric drive Be provided via a push rod and a coupling derived drive, the lower row of guide rods or blow air tubes is pivotable via a coupling rod connected to the lever.
  • Two side frames are connected to one another by two cross members 2 and 3 and by a fixed support 4.
  • a motor 6 is screwed on, which serves to drive the drive disk 7, which is firmly wedged on the shaft 8, which in turn is rotatably mounted in the cross member 3 at its end removed from the motor 6 .
  • a further shaft 9 is rotatably mounted above the shaft 8 both in the cross member 2 and in the fixed support 4.
  • a pulley 10 is supported on this shaft 9, which, together with the drive pulley 7, is wrapped by a toothed belt 11.
  • the shaft 9 protrudes with its end facing away from the cross member 2 from the fixed support 4, a deflection disk 12 being firmly connected to the projecting end.
  • the fixed carrier 4 has a further shaft, not shown, which carries a further deflection disk 13. Both deflection disks 12 and 13 are wrapped in a carrier tape 14 (see FIG. 2), the upper run of the carrier tape 14 being supported by a curved bar 15. In a manner not shown, this curved beam 15 is screwed to the fixed support 4.
  • the curved bar 15 causes the separating knife 16, which is firmly connected to the carrier tape 14, to have an arcuate course in the region of the upper run of the tape 14, so that the knife edge does not constantly cut with one and the same point, which would result in high knife wear.
  • FIG. 1 It can be seen from FIG. 1 that 16 counter jaws 17 and 18 are provided on both sides of the separating knife, the counter jaw 17 being held on the carrier 4 and the counter jaw 18 on the beam 15.
  • a movable welding jaw 19 and a movable clamping bar 20 interact with the two counter jaws 17 and 18.
  • Welding jaws 19 as well as clamping bars 20 are slidably placed on a pull rod 21 and are rested by springs 22 and 23, i.e. in the raised position, pressed against the clamping ring 24 firmly connected to the pull rod 21.
  • the pull rod 21 itself is held by a machine-fixed guide 26 and is articulated to a rocker arm 27 via a tab 25. This rocker arm is supported on a shaft 28 and can be cyclically raised by a cam 29 against the force of a tension spring 20.
  • an adjustable coupling 31 is articulated at one end, the other end of which engages a lever 32 which is freely rotatable on the axis 33 of the lower feed roller 34.
  • the lower feed roller 34 is provided with circumferential grooves, not shown, through which a blowing air rake protrudes, which is attached to the lever 32 is.
  • the upper feed roller 35 also has circumferential grooves, not shown, through which an upper blowing air rake 36 projects. The upper blowing air rake 36 is not movable and is held by the side frames. The position of the machine shown in FIG.
  • FIG. 1 shows the position in which a section of an endless web is being cut off, ie the pull rod 21 is lowered, the clamping jaw 20 presses the film against the separating jaw 18, the welding bar 19 presses against the counter jaw 17 and welds the two layers of a film tube. It can be seen from FIG. 1 that the revolving cutting knife 16 cuts through the tubular web in this position.
  • the pull rod 21 is pressed upward by the cam plate 29, so that the clamping ring 24 presses against the clamping bar 20 and lifts it together with the welding jaw 19 so far from the counter jaws 17 and 18 that the connection thereafter advanced film tube no longer comes into contact with the knife 16.
  • the adjustable coupling 31 is pulled downward, so that the lower rake 37 assumes the raised position shown with dashed lines, whereby the foil is raised for better guidance and guided over the rotating knife 16.
  • the pivoted lower rake 37 allows the film web to be pressed down into the knife area without the risk of the film being damaged by the front edge of the rake as seen in the transport direction.
  • the blown air rakes 36 and 37 are used in a known manner to discharge the advanced tubular film end into the opened welding station.

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Abstract

Eine Vorrichtung dient zum Herstellen von Beuteln aus einer doppellagigen Bahn aus thermoplastischem Material. Die Vorrichtung besitzt die Bahn intermittierend um jeweils einer Beutellänge zwischen Schweißbalken (17, 19), von denen der obere mit einem diesen hebenden und absenkenden Antrieb versehen ist, vorschiebende Vorzugswalzen (34, 35) und ein unterhalb der Bahn und parallel zu dem unteren Schweißbalken (17) neben diesem geführtes Trennmesser (16), das an einem endlosen über Rollen umlaufenden Zugmittel befestigt und in dessen Schneidbereich die Bahn durch den oberen Schweißbalken (19) herabdrückbar ist. Um auch den unteren Schweißbalken gestellfest halten zu können, ohne daß außerhalb der Schweißtakte eine Kollision der Bahn mit dem Schneidmesser möglich ist, sind zur Zuführung der Bahn die unmittelbar vor den Schweißbalken (17, 19) angeordneten Vorzugswalzen (34, 35) in Ringnuten durchsetzende Reihen von kammartig angeordneten oberen und unteren Führungsstäben oder Blasluftröhrchen (36, 37) vorgesehen, die zwischen sich die Bahn zwischen die geöffneten Schweißbalken (17, 19) in einer oberhalb der Messerbahn liegenden Ebene hindurchführen. Der untere Schweißbalken (17) ist gestellfest angeordnet. Das ständig umlaufende Messer (16) durchsetzt die durch den unteren Schweißbalken (17) bestimmte Ebene der Bahn während des Ausführens der Querschweißnaht. Es sind die untere Reihe der Führungsstäbe oder Blasluftröhrchen (37) in Richtung auf den unteren Schweißbalken (17) verschwenkende Einrichtungen vorgesehen, die gleichzeitig mit dem Absenken des oberen Schweißbalkens (19) betätigt werden.A device is used to manufacture bags from a double-layered sheet of thermoplastic material. The device has the web intermittently by one bag length between welding bars (17, 19), of which the upper one is provided with a drive which raises and lowers it, advancing feed rollers (34, 35) and one below the web and parallel to the lower welding bar (17) next to this guided cutting knife (16), which is attached to an endless traction device running over rollers and in the cutting area of which the web can be pressed down by the upper welding bar (19). In order to also be able to hold the lower welding bar fixed to the frame without a collision of the web with the cutting knife being possible outside the welding cycles, the feed rollers (34, 35) arranged in front of the welding bars (17, 19) are penetrating in annular grooves Rows of comb-like upper and lower guide rods or blow air tubes (36, 37) are provided, which pass the web between them between the opened welding bars (17, 19) in a plane above the knife path. The lower welding bar (17) is fixed to the frame. The constantly revolving knife (16) passes through the plane of the path determined by the lower welding bar (17) during the execution of the transverse weld seam. The lower row of guide rods or blow air tubes (37) pivoting devices in the direction of the lower welding bar (17) are provided, which are actuated simultaneously with the lowering of the upper welding bar (19).

Description

Die Erfindung betrifft eine Vorrichtung zum Herstellen von Beuteln aus einer doppellagigen Bahn aus thermoplastischem Mate­rial mit die Bahn intermittierend um jeweils eine Beutellänge zwischen Schweißbacken, von denen der obere mit einem diesen hebenden und absenkenden Antrieb versehen ist, vorschiebenden Vorzugswalzen und mit einem unterhalb der Bahn und parallel zu dem unteren Schweißbalken neben diesem geführten Trennmesser, das an einem endlosen über Rollen umlaufenden Zugmittel befe­stigt und in dessen Schneidbereich die Bahn durch den oberen Schweißbalken herabdrückbar ist.The invention relates to a device for producing bags from a double-layer web of thermoplastic material with the web intermittently by a bag length between welding jaws, of which the upper one is provided with a lifting and lowering drive, feed rollers and one below the web and parallel to the lower welding bar next to this guided cutting knife, which is attached to an endless traction device running over rollers and in the cutting area of which the web can be pressed down by the upper welding bar.

Bei einer aus der DE-AS 20 05 040 bekannten Vorrichtung dieser Art ist auch der untere Schweißbalken beweglich gelagert und durch den oberen gegen Federkraft in die Schneidebene herab­drückbar, was zusätzliche Führungsmittel für den unteren Schweißbalken erforderlich macht.In a device of this type known from DE-AS 20 05 040, the lower welding bar is also movably supported and can be pressed down into the cutting plane by spring force, which makes additional guide means for the lower welding bar necessary.

Aufgabe der Erfindung ist es daher, eine Vorrichtung der eingangs angegebenen Art zu schaffen, bei der auch der untere Schweißbalken gestellfest gehalten werden kann, ohne daß außer­halb der Schweißtakte eine Kollision der Bahn mit dem Schneid­messer möglich ist.The object of the invention is therefore to provide a device of the type specified in the introduction, in which the lower welding bar can also be held fixed to the frame without a collision of the web with the cutting knife being possible outside the welding cycles.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß zur Zuführung der Bahn die unmittelbar vor den Schweißbalken ange­ordneten Vorzugswalzen in Ringnuten durchsetzende Reihen von kammartig angeordneten oberen und unteren Führungsstäben oder Blasluftröhrchen vorgesehen sind, die zwischen sich die Bahn zwischen die geöffneten Schweißbalken in einer oberhalb der Mes­serbahn liegenden Ebene hindurchführen, daß der untere Schweiß­balken gestellfest angeordnet ist und daß ständig umlaufende Messer die durch den unteren Schweißbalken bestimmte Ebene der Bahn während des Ausführens der Querschweißnaht durchsetzt und daß die untere Reihe der Führungsstäbe oder Blasluftröhrchen in Richtung auf den unteren Schweißbalken verschwenkende Einrich­tungen vorgesehen sind, die gleichzeitig mit dem Absenken des oberen Schweißbalkens betätigt werden.According to the invention, this object is achieved in that, for feeding the web, the preferred rollers arranged directly in front of the welding bars are provided in rows of rows of comb-like upper and lower guide rods or blow air tubes which pass through in annular grooves and between them the web lies between the opened welding bars in an area above the knife path Pass through the plane, that the lower welding bar is fixed to the frame and that continuously rotating knives pass through the plane of the web defined by the lower welding bar during the execution of the transverse weld seam and that the lower row of guide rods or blow air tubes are provided pivoting devices in the direction of the lower welding bar, which are operated simultaneously with the lowering of the upper welding bar.

Bei der erfindungsgemäßen Vorrichtung verhindern die der Führung der Bahn dienenden Reihen von Führungsstäben oder Blasluftröhr­chen, daß das quergeführte Messer die Bahn außerhalb der Schweiß­takte beschädigen kann, während der die Schweißbalken voneinan­der abgehoben sind. Während des Schweißtaktes drückt der obere Schweißbalken die Bahn in die Schnittebene, so daß das querge­führte Messer die zwischen den Schweißbalken festgeklemmte Bahn quer durchtrennen kann. Ein scharfkantiges Abziehen der Bahn über die untere Reihe der Führungsstäbe oder Blasluftröhrchen ist dadurch vermieden, daß diese in Richtung auf den unteren Schweißbalken während des Schweißtaktes verschwenkt wird. Dadurch sind Beschädigungen der Bahn oder in diese eingedrückte Riefen vermieden.In the device according to the invention, the rows of guide rods or blow air tubes which serve to guide the web prevent the cross-guided knife from damaging the web outside the welding cycles, during which the welding bars are lifted apart. During the welding cycle, the upper welding bar presses the web into the cutting plane, so that the knife guided across the web clamps the web clamped between the welding bars can cut across. A sharp-edged pulling off of the web over the lower row of guide rods or blow air tubes is avoided by pivoting it towards the lower welding bar during the welding cycle. This avoids damage to the web or grooves pressed into it.

Das vorzugsweise an einem Zahnriemen oder einer Kette befestigte Messer ist derart relativ zu dem die Schweißtakte ausführenden Antrieb angetrieben, daß sich das Schneidmesser während des Absenkens des oberen Schweißbalkens außerhalb des Obertrums des Zugmittels befindet, so daß das Schneidmesser nicht an der Bahn angreifen kann, so lange es nicht zwischen den Schweißbalken festgeklemmt ist.The knife, which is preferably attached to a toothed belt or a chain, is driven relative to the drive performing the welding cycles in such a way that the cutting knife is located outside the upper run of the traction means during the lowering of the upper welding bar, so that the cutting knife cannot engage the web, so as long as it is not stuck between the welding bars.

Es können auch zu den Schweißbalken parallele Klemm- oder zweite Schweißbalken vorgesehen werden, zwischen denen die Messerbahn verläuft, wobei der untere Klemm- oder zweite Schweißbalken in der Ebene des unteren Schweißbalkens liegt. Bei dieser Ausfüh­rungsform wird der Quertrennschnitt an einem schmalen Bahnab­schnitt durchgeführt, der zwischen jeweils zwei Schweißbalken oder zwischen einem Schweißbalken- und einem Klemmbalkenpaar liegt.Clamping or second welding bars parallel to the welding bars can also be provided, between which the knife path runs, the lower clamping or second welding bar lying in the plane of the lower welding bar. In this embodiment, the cross-cut is carried out on a narrow path section which lies between two welding bars or between a welding bar and a pair of clamping bars.

Nach einer besonderen erfinderischen Ausgestaltung, für die für sich allein Schutz beansprucht wird, ist vorgesehen, daß das Obertrum des Zugmittels auf einem konvex gekrümmten Träger oder einer konvex gekrümmten Gleit- oder Röllchenbahn abgestützt ist, so daß das Messer relativ zur Bahnebene eine Querbewegung aus­führt.According to a special inventive embodiment, for which protection is claimed by itself, it is provided that the upper run of the traction means is supported on a convexly curved support or a convexly curved slide or roller track, so that the knife executes a transverse movement relative to the plane of the track.

Zum taktweisen Heben und Senken des oder der oberen Schweiß- und/oder Klemmbalken kann ein von einem wippenartig gelagerten und durch einen Nocken- oder Exzenterantrieb verschwenkten Hebel über eine Schubstange und eine Koppel abgeleiteter Antrieb vor­gesehen sein, wobei die untere Reihe der Führungsstäbe oder Blasluftröhrchen über eine mit dem Hebel verbundene Koppelstange verschwenkbar ist.For the cyclical lifting and lowering of the upper welding bar and / or clamping bar, a lever can be pivoted by a rocker and pivoted by a cam or eccentric drive Be provided via a push rod and a coupling derived drive, the lower row of guide rods or blow air tubes is pivotable via a coupling rod connected to the lever.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt

  • Fig. 1 die Beutelherstellungsmaschine in Seitenansicht,
  • Fig. 2 die Antriebsmittel und Führungsbahn des Querschneidmessers in vergrößerter Seitenansicht und
  • Fig. 3 die Beutelmaschine nach Fig. 1 in Draufsicht.
An embodiment of the invention is explained below with reference to the drawing. In this shows
  • 1 is a side view of the bag making machine,
  • Fig. 2 shows the drive means and guideway of the cross-cutting knife in an enlarged side view
  • Fig. 3 shows the bag machine according to Fig. 1 in plan view.

Zwei Seitengestelle, von denen nur das Seitengestell 1 darge­stellt ist, sind durch zwei Traversen 2 und 3 sowie durch einen festen Träger 4 miteinander verbunden. Auf einer weiteren die beiden Seitengestelle miteinander verbindenden Traverse 5 ist ein Motor 6 aufgeschraubt, der zum Antrieb der Antriebsscheibe 7 dient, welche fest auf der Welle 8 aufgekeilt ist, die ihrer­seits an ihrem von dem Motor 6 entgernten Ende drehbar in der Traverse 3 gelagert ist. Oberhalb der Welle 8 ist eine weitere Welle 9 sowohl in der Traverse 2 wie auch im festen Träger 4 drehbar gelagert. Auf dieser Welle 9 lagert eine Riemenscheibe 10, die gemeinsam mit der Antriebsscheibe 7 von einem Zahnriemen 11 umschlungen ist. Die Welle 9 ragt mit ihrem der Traverse 2 abgewandten Ende aus dem festen Träger 4 vor, wobei mit dem vorstehenden Ende eine Umlenkscheibe 12 fest verbunden ist.Two side frames, of which only the side frame 1 is shown, are connected to one another by two cross members 2 and 3 and by a fixed support 4. On a further cross member 5 connecting the two side frames, a motor 6 is screwed on, which serves to drive the drive disk 7, which is firmly wedged on the shaft 8, which in turn is rotatably mounted in the cross member 3 at its end removed from the motor 6 . A further shaft 9 is rotatably mounted above the shaft 8 both in the cross member 2 and in the fixed support 4. A pulley 10 is supported on this shaft 9, which, together with the drive pulley 7, is wrapped by a toothed belt 11. The shaft 9 protrudes with its end facing away from the cross member 2 from the fixed support 4, a deflection disk 12 being firmly connected to the projecting end.

Im Abstand zur Welle 9 weist der feste Träger 4 eine weitere nicht dargestellte Welle auf, die eine weitere Umlenkscheibe 13 trägt. Beide Umlenkscheiben 12 und 13 werden von einem Träger­band 14 umschlungen (siehe Fig. 2), wobei das Obertrum des Trä­gerbandes 14 durch einen gewölbten Balken 15 unterstützt ist. Auf nicht dargestellte Weise ist dieser gewölbte Balken 15 mit dem festen Träger 4 verschraubt. Der gewölbte Balken 15 bewirkt, daß das mit dem Trägerband 14 fest verbundene Trennmesser 16 im Bereich des Obertrums des Bandes 14 einen bogenförmigen Verlauf hat, so daß die Messerschneide nicht ständig mit ein und dersel­ben Stelle schneidet, was einen hohen Messerverschleiß zur Folge hätte.At a distance from the shaft 9, the fixed carrier 4 has a further shaft, not shown, which carries a further deflection disk 13. Both deflection disks 12 and 13 are wrapped in a carrier tape 14 (see FIG. 2), the upper run of the carrier tape 14 being supported by a curved bar 15. In a manner not shown, this curved beam 15 is screwed to the fixed support 4. The curved bar 15 causes the separating knife 16, which is firmly connected to the carrier tape 14, to have an arcuate course in the region of the upper run of the tape 14, so that the knife edge does not constantly cut with one and the same point, which would result in high knife wear.

Aus der Fig. 1 ist zu ersehen, daß beidseits des Trennmessers 16 Gegenbacken 17 und 18 vorgesehen sind, wobei die Gegenbacke 17 an dem Träger 4 und die Gegenbacke 18 am Balken 15 gehalten sind. Mit den beiden Gegenbacken 17 und 18 wirken eine bewegli­che Schweißbacke 19 und ein beweglicher Klemmbalken 20 zusammen. Schweißbacken 19 wie auch Klemmbalken 20 sind gleitend auf eine Zugstange 21 aufgesetzt und werden von Federn 22 und 23 in Ruhe­stellung, d.h. in angehobener Stellung, gegen den mit der Zug­stange 21 fest verbundenen Klemmring 24 gedrückt. Die Zugstange 21 selbst wird von einer maschinenfesten Führung 26 gehalten und ist über eine Lasche 25 gelenkig an einen Kipphebel 27 ange­lenkt. Dieser Kipphebel lagert auf einer Welle 28 und kann takt­weise von einer Kurvenscheibe 29 entgegen der Kraft einer Zug­feder 20 angehoben werden.It can be seen from FIG. 1 that 16 counter jaws 17 and 18 are provided on both sides of the separating knife, the counter jaw 17 being held on the carrier 4 and the counter jaw 18 on the beam 15. A movable welding jaw 19 and a movable clamping bar 20 interact with the two counter jaws 17 and 18. Welding jaws 19 as well as clamping bars 20 are slidably placed on a pull rod 21 and are rested by springs 22 and 23, i.e. in the raised position, pressed against the clamping ring 24 firmly connected to the pull rod 21. The pull rod 21 itself is held by a machine-fixed guide 26 and is articulated to a rocker arm 27 via a tab 25. This rocker arm is supported on a shaft 28 and can be cyclically raised by a cam 29 against the force of a tension spring 20.

An dem der Lasche 25 gegenüberliegenden Ende des Kipphebels 27 ist einendig eine einstellbare Koppel 31 angelenkt, deren ande­res Ende an einem Hebel 32 angreift, der frei drehbar auf der Achse 33 der unteren Vorzugswalze 34 sitzt. Die untere Vorzugs­walze 34 ist mit umlaufenden nicht dargestellten Nuten versehen, durch die ein Blasluftrechen ragt, der an dem Hebel 32 befestigt ist. Die obere Vorzugswalze 35 weist ebenfalls nicht dargestell­te umlaufende Nuten auf, durch die ein oberer Blasluftrechen 36 ragt. Der obere Blasluftrechen 36 ist nicht beweglich und wird von den Seitengestellen gehalten. Die in der Fig. 1 dargestellte Lage der Maschine zeigt die Lage, in der gerade ein Abschnitt von einer Endlosbahn abgeschnitten wird, d.h. die Zugstange 21 ist abgesenkt, der Klemmbacken 20 drückt die Folie gegen die Trennbacke 18, der Schweißbalken 19 drückt gegen die Gegenbacke 17 und verschweißt die beiden Lagen eines Folienschlauches. Dabei ist aus der Fig. 1 zu erkennen, daß das umlaufende Trenn­messer 16 in dieser Lage die Schlauchbahn durchtrennt.At the end of the rocker arm 27 opposite the tab 25, an adjustable coupling 31 is articulated at one end, the other end of which engages a lever 32 which is freely rotatable on the axis 33 of the lower feed roller 34. The lower feed roller 34 is provided with circumferential grooves, not shown, through which a blowing air rake protrudes, which is attached to the lever 32 is. The upper feed roller 35 also has circumferential grooves, not shown, through which an upper blowing air rake 36 projects. The upper blowing air rake 36 is not movable and is held by the side frames. The position of the machine shown in FIG. 1 shows the position in which a section of an endless web is being cut off, ie the pull rod 21 is lowered, the clamping jaw 20 presses the film against the separating jaw 18, the welding bar 19 presses against the counter jaw 17 and welds the two layers of a film tube. It can be seen from FIG. 1 that the revolving cutting knife 16 cuts through the tubular web in this position.

Nach dem Schweiß- und Trennvorgang wird die Zugstange 21 durch die Kurvenscheibe 29 nach oben gedrückt, so daß der Klemmring 24 gegen den Klemmbalken 20 drückt und diesen zusammen mit der Schweißbacke 19 so weit von den Gegenbacken 17 und 18 abhebt, daß die im Anschluß daran vorgeschobene Folienschlauchbahn nicht mehr mit dem Messer 16 in Berührung gerät. Gleichzeitig mit dem Anheben der Zugsange 21 wird die einstellbare Koppel 31 nach unten gezogen, so daß der untere Rechen 37 die mit gestrichelten Linien dargestellte angehobene Lage einnimmt, wodurch die Folie zwecks besserer Führung angehoben und über das umlaufende Messer 16 hinweggeführt wird.After the welding and cutting process, the pull rod 21 is pressed upward by the cam plate 29, so that the clamping ring 24 presses against the clamping bar 20 and lifts it together with the welding jaw 19 so far from the counter jaws 17 and 18 that the connection thereafter advanced film tube no longer comes into contact with the knife 16. Simultaneously with the lifting of the tension rod 21, the adjustable coupling 31 is pulled downward, so that the lower rake 37 assumes the raised position shown with dashed lines, whereby the foil is raised for better guidance and guided over the rotating knife 16.

Während durch das Anheben des unteren Rechens 37 die Folie geführt wird, erlaubt der abgeschwenkte untere Rechen 37 das Herunterdrücken der Folienbahn in den Messerbereich, ohne daß die Gefahr besteht, daß durch die in Transportrichtung gesehen vordere Kante des Rechens die Folie beschädigt wird. Die Blas­luftrechen 36 und 37 dienen in bekannter Weise zum Austragen des vorgeschobenen Schlauchfolienendes in die geöffnete Schweiß­station.While the film is guided by lifting the lower rake 37, the pivoted lower rake 37 allows the film web to be pressed down into the knife area without the risk of the film being damaged by the front edge of the rake as seen in the transport direction. The blown air rakes 36 and 37 are used in a known manner to discharge the advanced tubular film end into the opened welding station.

Claims (4)

1. Vorrichtung zum Herstellen von Beuteln aus einer doppel­lagigen Bahn aus thermoplastischem Material mit die Bahn intermittierend um jeweils eine Beutellänge zwischen Schweißbalken, von denen der obere mit einem diesen heben­den und absenkenden Antrieb versehen ist, vorschiebenden Vorzugswalzen und mit einem unterhalb der Bahn und paral­lel zu dem unteren Schweißbalken neben diesem geführten Trennmesser, das an einem endlosen über Rollen umlaufenden Zugmittel befestigt und in dessen Schneidbereich die Bahn durch den oberen Schweißbalken herabdrückbar ist,
dadurch gekennzeichnet,
daß zur Zuführung der Bahn die unmittelbar vor den Schweiß­balken (17, 19) angeordneten Vorzugswalzen (34, 35) in Ringnuten durchsetzende Reihen von kammartig angeordneten oberen und unteren Führungsstäben oder Blasluftröhrchen (36, 37) vorgesehen sind, die zwischen sich die Bahn zwischen die geöffneten Schweißbalken (17, 19) in einer oberhalb der Messerbahn liegenden Ebene hindurchführen, daß der untere Schweißbalken (17) gestellfest angeordnet ist und das ständig umlaufende Messer (16) die durch den unteren Schweißbalken (17) bestimmte Ebene der Bahn wäh­rend des Ausführens der Querschweißnaht durchsetzt und daß die untere Reihe der Führungsstäbe oder Blasluftröhrchen (37) in Richtung auf den unteren Schweißbalken (17) ver­schwenkende Einrichtungen vorgesehen sind, die gleich­zeitig mit dem Absenken des oberen Schweißbalkens (19) betätigt werden.1.Device for producing bags from a double-layered web of thermoplastic material with the web intermittent by a bag length between welding bars, of which the upper one is provided with a lifting and lowering drive, advancing feed rollers and one below the web and parallel to it the lower welding bar next to this guided cutting knife, which is attached to an endless traction device running over rollers and in the cutting area of which the web can be pressed down by the upper welding bar,
characterized,
that the feed rollers (34, 35) arranged in front of the welding bar (17, 19) for feeding the web Rows of rows of comb-like upper and lower guide rods or blow air tubes (36, 37) are provided, which pass between them the path between the opened welding bars (17, 19) in a plane lying above the knife path so that the lower welding bar (17) is fixed to the frame and the continuously rotating knife (16) passes through the plane of the web defined by the lower welding bar (17) during the execution of the transverse welding seam and that the lower row of guide rods or blow air tubes (37) in the direction of the lower welding bar (17) pivoting devices are provided which are operated simultaneously with the lowering of the upper welding bar (19). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zu den Schweißbalken (17, 19) parallele Klemm- oder zweite Schweißbalken (18, 20) vorgesehen sind, zwischen denen die Messerbahn verläuft, und daß der untere Klemm- oder zweite Schweißbalken (18) in der Ebene des ersten unteren Schweiß­balkens (17) liegt.2. Device according to claim 1, characterized in that parallel to the welding bars (17, 19) clamping or second welding bars (18, 20) are provided, between which the knife path runs, and that the lower clamping or second welding bar (18 ) lies in the plane of the first lower welding bar (17). 3. Vorrichtung insbesondere nach Anspruch 1, dadurch gekenn­zeichnet, daß das Obertrum des Zugmittels (14) auf einem konvex gekrümmten Träger (15) oder einer Gleit- oder Röll­chenbahn abgestützt ist, so daß das Messer (16) relativ zur Bahnebene eine Querbewegung ausführt.3. Device in particular according to claim 1, characterized in that the upper run of the traction means (14) is supported on a convexly curved support (15) or a slide or roller track, so that the knife (16) executes a transverse movement relative to the plane of the path. 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zum taktweisen Heben und Senken des oder der oberen Schweiß- und/oder Klemmbalken (19, 20) ein von einem wippenartig gelagerten und durch einen Nocken- oder Exzenterantrieb (29) verschwenkbaren Hebel (27) über eine Schubstange (21) und eine Koppel (25) abgeleiteter Antrieb vorgesehen ist und daß die untere Reihe der Führungsstäbe oder Blasluftröhrchen (37) über eine mit dem Hebel (27) verbundene Koppelstange (31) verschwenkbar ist.4. Device according to one of claims 1 to 3, characterized in that for the cyclical lifting and lowering of the upper welding and / or clamping bar (19, 20) a from a rocker-mounted and by a cam or eccentric drive (29) pivotable lever (27) via a push rod (21) and a coupling (25) derived drive is provided and that the lower row of guide rods or blow air tubes (37) via a coupling rod (31) connected to the lever (27) can be pivoted.
EP86110779A 1985-09-03 1986-08-04 Device for the production of bags Expired EP0215269B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3531457 1985-09-03
DE19853531457 DE3531457A1 (en) 1985-09-03 1985-09-03 DEVICE FOR PRODUCING BAGS

Publications (2)

Publication Number Publication Date
EP0215269A1 true EP0215269A1 (en) 1987-03-25
EP0215269B1 EP0215269B1 (en) 1989-01-11

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EP86110779A Expired EP0215269B1 (en) 1985-09-03 1986-08-04 Device for the production of bags

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US (1) US4734088A (en)
EP (1) EP0215269B1 (en)
CA (1) CA1264421A (en)
DE (1) DE3531457A1 (en)
DK (1) DK160686C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597401B1 (en) * 1986-04-18 1988-08-05 Lagain Georges INSTALLATION FOR MANUFACTURING AND STACKING BAGS, BAGS, ETC. IN THERMOPLASTIC MATTER
IT1213658B (en) * 1987-07-28 1989-12-29 Colin Luis WELDING, CUTTING, WITHDRAWAL AND STORAGE DEVICE IN MACHINES FOR THE MANUFACTURE OF PLASTIC BAGS
CN114714667B (en) * 2021-09-18 2024-07-26 颖态智能技术(上海)有限公司 Bag making equipment and pre-stretching belt device thereof

Citations (1)

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Publication number Priority date Publication date Assignee Title
US4518378A (en) * 1981-01-13 1985-05-21 Karl Heinz Stiegler Apparatus for the manufacture of plastic bags

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Publication number Priority date Publication date Assignee Title
NL126949C (en) * 1967-04-14 1967-04-14
FR2031713A5 (en) * 1969-02-04 1970-11-20 Lagain Georges
JPS51744B1 (en) * 1970-04-30 1976-01-10
DE2556968C2 (en) * 1975-12-18 1985-04-18 Hans 5216 Niederkassel Lehmacher Machine for the production of bags, sacks or similar packaging from a thermoplastic plastic film web
US4230029A (en) * 1978-10-26 1980-10-28 Gloucester Engineering Co., Inc. Cutting assembly useful in bag machines
DE7925119U1 (en) * 1979-09-05 1981-03-12 Gartemann & Hollmann Gmbh, 4800 Bielefeld DEVICE FOR CUTTING PAPER FILMS
US4613320A (en) * 1983-10-20 1986-09-23 Automated Packaging Systems, Inc. Container forming apparatus

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US4518378A (en) * 1981-01-13 1985-05-21 Karl Heinz Stiegler Apparatus for the manufacture of plastic bags

Also Published As

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DE3531457C2 (en) 1990-03-29
CA1264421A (en) 1990-01-16
DK419986D0 (en) 1986-09-02
DE3531457A1 (en) 1987-03-12
US4734088A (en) 1988-03-29
EP0215269B1 (en) 1989-01-11
DK160686B (en) 1991-04-08
DK160686C (en) 1991-09-23
DK419986A (en) 1987-03-04

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