DE19728603A1 - Welding unit producing a longitudinal seal along packaging tube formed from film strip - Google Patents
Welding unit producing a longitudinal seal along packaging tube formed from film stripInfo
- Publication number
- DE19728603A1 DE19728603A1 DE19728603A DE19728603A DE19728603A1 DE 19728603 A1 DE19728603 A1 DE 19728603A1 DE 19728603 A DE19728603 A DE 19728603A DE 19728603 A DE19728603 A DE 19728603A DE 19728603 A1 DE19728603 A1 DE 19728603A1
- Authority
- DE
- Germany
- Prior art keywords
- film
- tape
- heat
- pressure medium
- tube
- 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
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
- B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
- B65B9/2014—Tube advancing means
- B65B9/2021—Tube advancing means combined with longitudinal welding devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/002—Handling tubes, e.g. transferring between shaping stations, loading on mandrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
- B29C65/30—Electrical means
- B29C65/305—Electrical means involving the use of cartridge heaters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
- B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
- B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/49—Internally supporting the, e.g. tubular, article during joining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
- B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
- B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
- B29C66/83513—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums cooperating jaws mounted on rollers, cylinders or drums and moving in a closed path
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
- B65B51/18—Applying or generating heat or pressure or combinations thereof by endless bands or chains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
- B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
- B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
- B65B51/306—Counter-rotating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
- B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
- B65B9/207—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles the web advancing continuously
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
- B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
- B29C66/83421—Roller, cylinder or drum types; Band or belt types; Ball types band or belt types
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Robotics (AREA)
- Package Closures (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Verschweißen einer Längssiegelnaht eines aus einer ebenen Folienbahn gebildeten Folienschlauches, mit einem Folienabzug zum Abziehen der Folienbahn von einer Vorratsrolle, einer Umformeinrichtung zum Umformen der Folienbahn zum Folienschlauch, einem Füllrohr zum Aufnehmen des Folienschlauches, und einer die Ränder der Folienbahn gegeneinander schweißenden Längssiegeleinrichtung, wobei die Längssiegeleinrichtung ein geschlossenes, mit seiner Innenfläche an zwei Rädern anliegendes, um die Räder umlaufendes, aufheizbares Heißsiegelband aufweist, und wobei ein Druckmittel gegen die Innenfläche des Heißsiegelbandes wirkt, um das Heißsiegelband mit seiner Außenfläche gegen die Ränder der Folienbahn zu drücken und um die Ränder in einer Längssiegelnaht miteinander zu verschweißen.The invention relates to a device for welding a longitudinal sealing seam from a flat film web formed film tube, with a film deduction for Pulling off the film web from a supply roll, a forming device for Forming the film web into a film tube, a filling tube for receiving the Foil tube, and one welding the edges of the foil web against each other Longitudinal sealing device, the longitudinal sealing device being a closed, with its inner surface, which rests on two wheels and runs around the wheels, has heatable sealing tape, and wherein a pressure medium against the Inner surface of the heat seal tape acts to hold the heat seal tape in place Press the outer surface against the edges of the film web and around the edges in one Longitudinal seal seam to be welded together.
Eine derartige Vorrichtung ist aus der DE-OS 44 00 590 bekannt. Bei dieser Vorrichtung läuft ein Heißsiegelband um zwei Räder um. Das Heißsiegelband wird mittels eines Stromflusses erwärmt und von einem länglichen Druckmittel gegen die Längssiegelnaht gedrückt. Das Druckmittel ist ortsfest. Zwischen der Innenfläche des Heißsiegelbandes und dem Druckmittel liegt beim Betrieb der Vorrichtung eine Gleitreibung vor.Such a device is known from DE-OS 44 00 590. At this The device runs around a heat seal tape around two wheels. The heat seal tape will heated by a current flow and by an elongated pressure medium against the Longitudinal seal seam pressed. The pressure medium is stationary. Between the inner surface of the The heat sealing tape and the pressure medium lie during operation of the device Sliding friction.
Beim Ansetzen einer derartigen Vorrichtung an ein Füllrohr und an einen das Füllrohr umgebenden Folienschlauch wird eine relativ große Masse gegen die Folie gestoßen. Da das Heißsiegelband stets zuerst auf eine für einen Schweißvorgang notwendige minimale Betriebstemperatur erwärmt wird und dann an das Füllrohr gesetzt wird, führt diese Stoßbelastung, besonders bei sehr dünnen Folien, manchmal zu einem lokalen Durchschweißen der Folie, wodurch eine undichte Stelle im Folienschlauch erzeugt wird. Ein Erwärmen des Heißsiegelbandes in am Füllrohr angesetztem Zustand würde infolge der Erwärmungsdauer ebenfalls zu einer lokal zu sehr aufgeschmolzenen, undichten Stelle im Folienschlauch führen.When attaching such a device to a filling pipe and to the filling pipe A relatively large mass is pushed against the film surrounding the film tube. Since the heat seal tape always first on a necessary for a welding process minimum operating temperature is heated and then placed on the fill pipe leads this shock load, especially with very thin films, sometimes to a local one The film is welded through, creating a leak in the film tube becomes. Heating the heat sealing tape in the state attached to the filling pipe would due to the duration of the heating, it also turned into a locally too leak in the film tube.
Der Erfindung liegt die Aufgabe zu Grunde, bei einer Vorrichtung der eingangs genannten Art ein lokales Durchschweißen zu Beginn eines Längsschweißvorganges bei relativ dünnen Folien zu verhindern. The invention is based on the object in a device of the beginning a type of local welding at the beginning of a longitudinal welding process to prevent with relatively thin foils.
Gelöst ist die Aufgabe gemäß dem kennzeichnenden Teil des Anspruchs 1. Danach ist das Druckmittel gegenüber der Innenfläche des Heißsiegelbandes mittels einer Stelleinrichtung rückstellbar, sind die Räder und das Heißsiegelband Teile einer gegenüber dem Füllrohr rückstellbaren Baugruppe, und ist das Druckmittel kein Teil der Baugruppe.The problem is solved according to the characterizing part of claim 1. After that the pressure medium against the inner surface of the heat seal tape by means of a Resetting device, the wheels and the heat seal tape are part of one compared to the filler tube resettable assembly, and the pressure medium is not a part the assembly.
Die erfindungsgemäße Vorrichtung hat den Vorteil, daß ein lokales Durchschweißen einer relativ dünnen Folie zu Beginn eines Längsschweißvorganges vermieden werden kann. Dadurch, daß das Druckmittel gegenüber der Innenfläche des Heißsiegelbandes mittels einer Stelleinrichtung rückstellbar ist, kann das Heißsiegelband mitsamt den Rädern relativ zum Druckmittel versetzt werden. Die Räder und das Heißsiegelband können mitsamt ihrer Baugruppe vom Folienschlauch weggestellt werden.The device according to the invention has the advantage that local welding through a relatively thin film can be avoided at the start of a longitudinal welding process can. The fact that the pressure medium opposite the inner surface of the heat seal tape can be reset by means of an adjusting device, the heat sealing tape together with the Wheels are offset relative to the pressure medium. The wheels and the heat seal tape can be put away from the film tube together with their assembly.
Zum Verschweißen einer relativ dünnen, z. B. 20 Mikrometer dicken Folie wird zunächst die Baugruppe mit dem erwärmten Heißsiegelband gegen die Folie gestellt, wobei diese Baugruppe eine deutlich geringere Masse als eine herkömmliche, das Druckmittel enthaltende Baugruppe hat. Die Stoßbelastung der Folie ist relativ gering, so daß ein Durchschweißen der Folie nicht vorkommt. Anschließend wird das Druckmittel gegen die Innenfläche des Heißsiegelbandes gestellt, um einen Schweißdruck zu erzeugen. Diese Schweißdruckerzeugung führt wegen der relativ geringen Masse des Druckmittels und der exakten Druckerzeugung durch die Stelleinrichtung ebenso nicht zu einem Durchschweißen der Folie.For welding a relatively thin, e.g. B. 20 microns thick film first place the assembly with the heated heat sealing tape against the film, this assembly has a significantly lower mass than a conventional one Has pressure-containing assembly. The impact load on the film is relatively low, so that the film does not weld through. Then that will Pressure medium placed against the inner surface of the heat sealing tape to a Generate welding pressure. This welding pressure generation leads because of the relative low mass of the pressure medium and the exact pressure generation by the Actuator also not to weld through the film.
Weitere, vorteilhafte Ausgestaltungen der erfindungsgemäßen Vorrichtung sind in den Ansprüchen 2 bis 8 beschrieben.Further advantageous embodiments of the device according to the invention are in the Claims 2 to 8 described.
Das Heißsiegelband kann einen Antrieb aufweisen, der ein Teil der Baugruppe ist (Anspruch 2). Dann ist das Heißsiegelband umlaufend antreibbar. Wenn der Antrieb zudem synchron zum Folienabzug angetrieben wird (Anspruch 7), so ist ein verzerrungsfreier Folientransport gegeben, der einer optimalen Längsnahtqualität dient.The heat seal tape can have a drive that is part of the assembly (Claim 2). Then the heat seal tape can be driven all around. If the drive is also driven synchronously with the film take-off (claim 7), is a distortion-free film transport is given, the optimal longitudinal seam quality serves.
Ist die Baugruppe um ein Drehgelenk schwenkbar (Anspruch 3), so kann in einfacher Weise, nach einem Rückstellen des Druckmittels, die Baugruppe vom Folienschlauch weggeschwenkt werden, z. B. um eine neue Folienbahn auf das Füllrohr zu bringen. If the assembly can be pivoted about a swivel joint (claim 3), it can be done in a simpler manner Way, after resetting the pressure medium, the assembly of the film tube be pivoted away, e.g. B. to bring a new film web on the filling tube.
Nach erfolgtem Folienwechsel wird die Baugruppe wieder gegen den Folienschlauch und das Füllrohr gesetzt. Anschließend, nach erfolgtem Erwärmen des Heißsiegelban des, wird das Druckmittel von der Stelleinrichtung gegen das Heißsiegelband gesetzt, und eine Längsnahtverschweißung kann beginnen.After the film has been changed, the assembly is again against the film tube and put the fill pipe. Then, after the heat-sealing tape has been heated the pressure medium is set against the heat sealing tape by the actuating device, and longitudinal seam welding can begin.
Ist das Druckmittel eine Heißsiegelbacke (Anspruch 4), so erfolgt bei einem Kontakt des Druckmittels mit dem Heißsiegelband eine Erwärmung des Heißsiegelbandes. Dadurch ist eine separate Wärmeeinbringung nicht notwendig. Zudem ist diese Technik sehr zuverlässig. Durch eine reibungsmindernde Beschichtung des Druckmittels, z. B. mit einer Polytetrafluorethylen enthaltenden Schicht, wird ein Verschleiß des Heißsiegelbandes verringert und die Standzeit der Vorrichtung verlängert.If the pressure medium is a heat sealing jaw (claim 4), it takes place on contact of the pressure medium with the heat sealing tape heating the heat sealing tape. This means that separate heat input is not necessary. In addition, this is Technology very reliable. With a friction-reducing coating on the Pressure medium, e.g. B. with a layer containing polytetrafluoroethylene, a Wear on the heat seal tape is reduced and the service life of the device extended.
Das Druckmittel ist in zuverlässiger Weise gegen das Heißsiegelband setzbar, wenn analog Anspruch 5 die Stelleinrichtung ein Pneumatikzylinder ist. Des weiteren ist diese Stelleinrichtung kostengünstig.The pressure medium can be reliably placed against the heat seal tape if analogous to claim 5, the actuating device is a pneumatic cylinder. Furthermore is this adjusting device inexpensively.
Ist das Heißsiegelband mittels elektrischer Kontakte mit einer Widerstandsheiz einrichtung verbunden, ist das Heißsiegelband ein Widerstandsheizelement, und ist das Druckmittel ein auf der Innenfläche des Heißsiegelbandes schleifendes oder abrollendes Druckmittel (Anspruch 6), so ist einerseits ein besonders schnelles Aufwärmen des Heißsiegelbandes erreicht. Zum anderen kann das Druckmittel in technisch einfacher Weise ausgestaltet werden. Ein abrollendes Druckmittel hat den Vorteil, daß der Verschleiß des Heißsiegelbandes minimiert ist.Is the heat seal tape using electrical contacts with a resistance heater device connected, the heat seal tape is a resistance heating element, and is the pressure medium is a grinding on the inner surface of the heat seal tape or rolling pressure medium (claim 6), on the one hand is a particularly fast Warming up the heat sealing tape reached. On the other hand, the pressure medium in be designed technically simple. A rolling pressure medium has the Advantage that the wear of the heat seal tape is minimized.
Ist die Vorrichtung Teil einer vertikalen Schlauchbeutelmaschine, und ist an der Vorrichtung ein rotierendes Backensystem mit mindestens zwei gegenläufig um Achsen rotierenden, den Folienschlauch quer zu dessen Transportrichtung verschweißenden Schweißbacken vorgesehen (Anspruch 8), so können in einem kontinuierlichen Verfahren Schlauchbeutel hergestellt werden. Die Befüllung der Schlauchbeutel erfolgt durch das Füllrohr. Die erfindungsgemäße Vorrichtung dient dabei der Verschweißung der Längssiegelnähte der Schlauchbeutel.Is the device part of a vertical form, fill and seal machine and is on the Device a rotating jaw system with at least two in opposite directions Rotating axes, the film tube transverse to its transport direction welding welding jaws provided (claim 8), so in one continuous process tubular bags are manufactured. Filling the Tubular bags are made through the filling tube. The device according to the invention serves thereby the welding of the longitudinal sealing seams of the tubular bags.
Im folgenden wird die Erfindung an Hand eines Ausführungsbeispiels näher erläutert. Es zeigt: The invention is explained in more detail below with the aid of an exemplary embodiment. It shows:
Fig. 1 in einer Seitenansicht in schematischer Darstellung eine Vorrichtung zum Verschweißen einer Längsnaht an einer vertikalen Schlauchbeutelmaschine, mit einem Folienabzug zum Abziehen einer Folienbahn von einer Vorratsrolle, einer Umformeinrichtung zum Umformen der Folienbahn zum Folienschlauch, einem Füllrohr zum Aufnehmen des Folienschlauches, und einer Längssiegeleinrichtung, wobei die Längssiegeleinrichtung ein um zwei Räder umlaufendes, mittels eines Antriebs angetriebenes Heißsiegelband und eine gegen das Heißsiegelband stellbare Heißsiegelbacke aufweist; Fig. 1 is a side view in schematic representation of a device for welding a longitudinal seam on a vertical tubular bag machine, with a film take-off for pulling off a film web from a supply roll, a shaping device for shaping the film web into a film tube, a filling tube for receiving the film tube, and a longitudinal sealing device , wherein the longitudinal sealing device has a heat sealing belt rotating around two wheels, driven by a drive, and a heat sealing jaw which can be set against the heat sealing belt;
Fig. 2 in einem Schnitt entlang A-A der Fig. 1 und in vergrößerter Darstellung das Füllrohr, den das Füllrohr umhüllenden Folienschlauch, das Heißsiegelband mit einem Rad, den Antrieb für das Heißsiegelband, und der gegen eine Innenfläche des Heißsiegelbandes mittels eines Pneumatikzylinders gestellten Heißsiegelbacke; Fig. 2 in a section along AA of Figure 1 and in an enlarged view the filling tube, the film tube enveloping the filling tube, the heat sealing tape with a wheel, the drive for the heat sealing tape, and the heat sealing jaw placed against an inner surface of the heat sealing tape by means of a pneumatic cylinder;
Fig. 3 in einer Schnittdarstellung den Gegenstand der Fig. 2, jedoch mit zurück gestellter Heißsiegelbacke, sowie Fig. 3 in a sectional view the subject of FIG. 2, but with the heat seal jaw set back, and
Fig. 4 in einer Schnittdarstellung den Gegenstand der Fig. 3, jedoch mit einer um ein Drehgelenk geschwenkten Baugruppe, welche das Heißsiegelband, die Räder und den Antrieb umfaßt, und wobei die Heißsiegelbacke und der Pneumatikzylinder in der in Fig. 3 dargestellten Position verblieben sind. Fig. 4 is a sectional view of the subject of Fig. 3, but with a pivoted assembly about an assembly comprising the heat seal tape, the wheels and the drive, and wherein the heat sealing jaw and the pneumatic cylinder have remained in the position shown in Fig. 3 .
An einer vertikalen Schlauchbeutelmaschine 1 ist eine Vorrichtung 2 zum Verschweißen einer Längssiegelnaht 21 eines aus einer ebenen Folienbahn 4 gebildeten Folienschlauches 5 vorgesehen (Fig. 1). Die Vorrichtung 2 umfaßt einen Folienabzug 6 zum Abziehen der Folienbahn 4 von einer Vorratsrolle 7, eine Umformeinrichtung 8 zum Umformen der Folienbahn 4 zu einem Folienschlauch 5, ein Füllrohr 10 zum Aufnehmen des Folienschlauches 9 und eine die Ränder 11 der Folienbahn 4 gegeneinander schweißenden Längssiegeleinrichtung 12. Der Folienabzug 6 besteht aus zwei um jeweils zwei Rollen 13 umlaufenden Abzugsriemen 14. Jeweils eine Rolle 13 an einem Abzugsriemen 14 ist angetrieben.To a vertical bagging machine 1, a device 2 for welding a longitudinal sealing seam 21 a from a flat web of film 4 formed film tube 5 is provided (Fig. 1). The apparatus 2 includes a film take-off 6 for removal of the film web 4 from a supply roll 7, a shaping device 8 for forming the film web 4 into a film tube 5, a filling tube 10 for receiving the film tube 9 and the edges 11 of the film web 4 against each welded longitudinal sealing device 12 . The film take-off 6 consists of two take-off belts 14 rotating around two rollers 13 each. In each case a roller 13 on a trigger belt 14 is driven.
Die Längssiegeleinrichtung 12 weist ein geschlossenes, mit seiner Innenfläche 15 an zwei Rädern 16, 17 anliegendes, um die Räder 16, 17 umlaufendes Heißsiegelband 18 auf. Ein Druckmittel 19 wirkt gegen die Innenfläche 15 des Heißsiegelbandes 18, um das Heißsiegelband 18 mit seiner Außenfläche 20 gegen die Ränder 11 der Folienbahn 4 zu drücken, und um die Ränder 16, 17 in einer Längssiegelnaht 21 miteinander zu verschweißen (Fig. 2).The longitudinal sealing device 12 has a closed, with its inner surface 15 against two wheels 16 , 17 , surrounding the wheels 16 , 17 heat sealing tape 18 . A pressure medium 19 acts against the inner surface 15 of the heat sealing tape 18 in order to press the heat sealing tape 18 with its outer surface 20 against the edges 11 of the film web 4 and to weld the edges 16 , 17 together in a longitudinal sealing seam 21 ( FIG. 2).
Das Druckmittel 19 ist eine Heißsiegelbacke 22. Innerhalb der Heißsiegelbacke 22 befinden sich Heizpatronen zum Erwärmen der Heißsiegelbacke 22 und des Heißsiegelbandes 18. Das Druckmittel 19 ist mittels einer als Pneumatikzylinder 23 ausgestalteten Stelleinrichtung 24 gegen die Innenfläche 15 gedrückt. Das Druckmittel 19 ist über eine abgewinkelte Halterung 25 mit dem Pneumatikzylinder 23 verbunden. Das Druckmittel 19 kann durch Rückstellen des Pneumatikzylinders 23 vom Heißsiegelband 18 wieder entfernt werden, wobei ein zuvor herrschender Schweißdruck abgebaut wird (Fig. 3).The pressure medium 19 is a heat sealing jaw 22 . Heating cartridges for heating the heat-sealing jaw 22 and the heat-sealing tape 18 are located within the heat-sealing jaw 22 . The pressure medium 19 is pressed against the inner surface 15 by means of an adjusting device 24 designed as a pneumatic cylinder 23 . The pressure medium 19 is connected to the pneumatic cylinder 23 via an angled bracket 25 . The pressure medium 19 can be removed from the heat sealing tape 18 by resetting the pneumatic cylinder 23 , a previously prevailing welding pressure being reduced ( FIG. 3).
Die Räder 16, 17 und das Heißsiegelband 18 sind Teile einer gegenüber dem Füllrohr 10 rückstellbaren Baugruppe 26. Das Druckmittel 19 und die Stelleinrichtung 24 sind keine Teile der Baugruppe 26 und verbleiben bei einem geschwenkten Rückstellen der Baugruppe 26 (Fig. 3) in ihrer zurückgestellten Position.The wheels 16 , 17 and the heat sealing tape 18 are parts of an assembly 26 that can be reset relative to the filling tube 10 . The pressure medium 19 and the actuating device 24 are not parts of the assembly 26 and remain in their reset position when the assembly 26 is pivoted back ( FIG. 3).
Ein Antrieb 9 für das Heißsiegelband 18 ist ebenfalls ein Teil der Baugruppe 26 und wird mitsamt den Rädern 16, 17 und dem Heißsiegelband 18 vom Folienschlauch 5 zurückgestellt. Der Antrieb 9 treibt das Rad 16 an. Die gesamte Baugruppe 26 ist um ein Drehgelenk 27 schwenkbar. Die Achsen 28 der Räder 16, 17 sind über ein Gelenk 29 mit dem Drehgelenk 27 verbunden.A drive 9 for the heat seal tape 18 is also part of the assembly 26 and is reset by the film tube 5 together with the wheels 16 , 17 and the heat seal tape 18 . The drive 9 drives the wheel 16 . The entire assembly 26 is pivotable about a hinge 27 . The axes 28 of the wheels 16 , 17 are connected to the swivel joint 27 via a joint 29 .
Nach einem Rückstellen der Stelleinrichtung 24 wird das Druckmittel 19 vom Heißsiegelband 18 genommen. Dann wird das Gestell 29 um das Drehgelenk 27 gedreht, wodurch das Heißsiegelband 18 vom Folienschlauch 5 entfernt wird. Nach einem erfolgten Folienwechsel wird zunächst das Heißsiegelband 18 gegen den Folienschlauch 5 gesetzt. Dabei erfolgt eine relativ geringe Stoßbelastung der Folienbahn, da die Baugruppe 26 die relativ schwere Heißsiegelbacke 22 nicht enthält. Da das Heißsiegelband 18 zunächst ohne Wärmekontakt mit der Heißsiegelbacke 22 ist, ist das Heißsiegelband 18 relativ kühl und ein Durchschweißen des Folienschlauches 5 kommt weder direkt nach dem Ansetzen des Heißsiegelbandes 18 an den Folienschlauch 5, noch unmittelbar nach dem Ansetzen der Heißsiegelbacke 22 an das Heißsiegelband 18 vor. Die angesetzte Heißsiegelbacke 22 benötigt eine gewisse Zeit, um das Heißsiegelband 18 zu erwärmen. Deshalb führt der Stoß, der beim Ansetzen der Heißsiegelbacke 22 an das Heißsiegelband 18 auf den Folienschlauch 5 ausgeübt wird, nicht zu einem Durchschweißen des Folienschlauches 5, selbst wenn eine sehr dünne Folie verwendet wird.After the actuating device 24 has been reset, the pressure medium 19 is removed from the heat sealing tape 18 . The frame 29 is then rotated about the swivel joint 27 , as a result of which the heat-sealing tape 18 is removed from the film tube 5 . After the film has been changed, the heat sealing tape 18 is first placed against the film tube 5 . This results in a relatively low impact load on the film web, since the assembly 26 does not contain the relatively heavy heat sealing jaw 22 . Since the heat sealing tape 18 is initially without thermal contact with the heat sealing jaw 22 , the heat sealing tape 18 is relatively cool and the film tube 5 does not weld through immediately after the heat sealing tape 18 is attached to the film tube 5 , nor immediately after the heat sealing jaw 22 has been attached to the heat sealing tape 18 before. The attached heat sealing jaw 22 takes a certain time to heat the heat sealing tape 18 . Therefore, the shock that is applied when preparing the heat seal jaw 22 to the heat-sealing band 18 to the film tube 5 does not lead to a through-welding of the film tube 5, even if a very thin film is used.
Der Folienabzug 6 und der Antrieb des Heißsiegelbandes 18 transportieren den Folienschlauch 5 synchron zueinander mit gleicher Geschwindigkeit weiter.The film take-off 6 and the drive of the heat-sealing tape 18 further transport the film tube 5 synchronously with one another at the same speed.
Die Vorrichtung 2 ist Teil einer vertikalen Schlauchbeutelmaschine 1 (Fig. 1). An der Vorrichtung 2 ist ein rotierendes Backensystem 30 mit jeweils zwei um eine Achse 31, 32 gegenläufig rotierenden, den Folienschlauch 5 quer zu dessen Transportrichtung 33 verschweißenden Schweißbacken 34 vorgesehen. In den Schweißbacken 34, die um die Achse 32 rotieren, ist jeweils ein Trennmesser 35 vorgesehen, um einen hergestellten Schlauchbeutel 36 vom Folienschlauch 5 zu trennen. Der Schlauchbeutel 35 wurde durch das Füllrohr 10 befüllt. In einem Schweißvorgang werden durch die Schweißbacken 34 jeweils eine Kopfnaht 37 eines Schlauchbeutels 36 und eine Bodennaht 38 eines nachfolgenden Schlauchbeutels verschweißt. Zwischen diesen Nähten durchtrennt das Trennmesser 35 den Folienschlauch 5. The device 2 is part of a vertical tubular bag machine 1 ( FIG. 1). To the apparatus 2 a rotating jaw system 30 is provided with two around an axis 31, 32 rotating in opposite directions, the film tube 5 welded transversely to the transport direction 33 the sealing jaws 34 is provided. A separating knife 35 is provided in the welding jaws 34 , which rotate about the axis 32 , in order to separate a tubular bag 36 produced from the tubular film 5 . The tubular bag 35 was filled through the filling tube 10 . In a welding process, a head seam 37 of a tubular bag 36 and a bottom seam 38 of a subsequent tubular bag are welded by the welding jaws 34 . The separating knife 35 cuts the film tube 5 between these seams.
11
Schlauchbeutelmaschine
Tubular bag machine
22nd
Vorrichtung
contraption
44th
Folienbahn
Foil web
55
Folienschlauch
Foil tube
66
Folienabzug
Film deduction
77
Vorratsrolle
Supply roll
88th
Umformeinrichtung
Forming device
99
Antrieb
drive
1010th
Füllrohr
Filling pipe
1111
Rand
edge
1212th
Längssiegeleinrichtung
Longitudinal sealing device
1313
Rolle
role
1414
Abzugsriemen
Trigger strap
1515
Innenfläche
Inner surface
1616
, ,
1717th
Rad
wheel
1818th
Heißsiegelband
Heat seal tape
1919th
Druckmittel
Pressure medium
2020th
Außenfläche
Outside surface
2121
Längssiegelnaht
Longitudinal seal seam
2222
Heißsiegelbacke
Heat seal jaw
2323
Pneumatikzylinder
Pneumatic cylinder
2424th
Stelleinrichtung
Actuator
2525th
Halterung
bracket
2626
Baugruppe
Assembly
2727
Drehgelenk
Swivel
2828
Achse
axis
2929
Gestell
frame
3030th
Backensystem
Jaw system
3131
, ,
3232
Achse
axis
3333
Transportrichtung
Direction of transport
3434
Schweißbacke
Welding jaw
3535
Trennmesser
Cutting knife
3636
Schlauchbeutel
Tubular bag
3737
Kopfnaht
Head seam
3838
Bodennaht
Bottom seam
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19728603A DE19728603B4 (en) | 1997-07-04 | 1997-07-04 | Device for welding a longitudinal sealing seam of a film tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19728603A DE19728603B4 (en) | 1997-07-04 | 1997-07-04 | Device for welding a longitudinal sealing seam of a film tube |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19728603A1 true DE19728603A1 (en) | 1999-01-07 |
DE19728603B4 DE19728603B4 (en) | 2005-12-29 |
Family
ID=7834646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19728603A Expired - Fee Related DE19728603B4 (en) | 1997-07-04 | 1997-07-04 | Device for welding a longitudinal sealing seam of a film tube |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19728603B4 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0553635A1 (en) * | 1992-01-28 | 1993-08-04 | Tokyo Automatic Machinery Works Limited | Sealing device of packaging device |
DE4400590A1 (en) * | 1994-01-12 | 1995-07-13 | Matthias Luebbers | Long seam sealing and transporting unit for folded film |
EP0710538A1 (en) * | 1994-11-02 | 1996-05-08 | Rovema Verpackungsmaschinen GmbH | Device for forming a longitudinal seam of a tubular film |
EP0759397A1 (en) * | 1995-08-18 | 1997-02-26 | ISHIDA CO., Ltd. | Longitudinal sealer for bag maker-packaging machine |
DE19541617A1 (en) * | 1995-11-08 | 1997-05-15 | Bosch Gmbh Robert | Tube and bag making machine |
-
1997
- 1997-07-04 DE DE19728603A patent/DE19728603B4/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0553635A1 (en) * | 1992-01-28 | 1993-08-04 | Tokyo Automatic Machinery Works Limited | Sealing device of packaging device |
DE4400590A1 (en) * | 1994-01-12 | 1995-07-13 | Matthias Luebbers | Long seam sealing and transporting unit for folded film |
EP0710538A1 (en) * | 1994-11-02 | 1996-05-08 | Rovema Verpackungsmaschinen GmbH | Device for forming a longitudinal seam of a tubular film |
DE4439104A1 (en) * | 1994-11-02 | 1996-05-09 | Rovema Gmbh | Device for forming a longitudinal seam of a film tube |
EP0759397A1 (en) * | 1995-08-18 | 1997-02-26 | ISHIDA CO., Ltd. | Longitudinal sealer for bag maker-packaging machine |
DE19541617A1 (en) * | 1995-11-08 | 1997-05-15 | Bosch Gmbh Robert | Tube and bag making machine |
Also Published As
Publication number | Publication date |
---|---|
DE19728603B4 (en) | 2005-12-29 |
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