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DE19702473A1 - Method and device for sealing film webs - Google Patents

Method and device for sealing film webs

Info

Publication number
DE19702473A1
DE19702473A1 DE19702473A DE19702473A DE19702473A1 DE 19702473 A1 DE19702473 A1 DE 19702473A1 DE 19702473 A DE19702473 A DE 19702473A DE 19702473 A DE19702473 A DE 19702473A DE 19702473 A1 DE19702473 A1 DE 19702473A1
Authority
DE
Germany
Prior art keywords
sealing
heating
packaging
film
hot air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19702473A
Other languages
German (de)
Inventor
Martin Reitze
Gernot Becker
Klaus-Dieter Kirsch
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.)
Tiromat Kraemer and Grebe GmbH and Co KG
Kraemer and Grebe KG
Original Assignee
Tiromat Kraemer and Grebe GmbH and Co KG
Kraemer and Grebe 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 Tiromat Kraemer and Grebe GmbH and Co KG, Kraemer and Grebe KG filed Critical Tiromat Kraemer and Grebe GmbH and Co KG
Priority to DE19702473A priority Critical patent/DE19702473A1/en
Priority to AU59874/98A priority patent/AU5987498A/en
Priority to PCT/EP1998/000125 priority patent/WO1998032588A1/en
Publication of DE19702473A1 publication Critical patent/DE19702473A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • 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
    • 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
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7888—Means for handling of moving sheets or webs
    • B29C65/7894—Means for handling of moving sheets or webs of continuously moving sheets or webs
    • 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
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • 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
    • 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
    • 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
    • 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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81465—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed behind the other in a single row in the feed direction
    • 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
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91441—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time
    • B29C66/91443—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile
    • B29C66/91445—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile by steps
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B29C66/91643—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile
    • B29C66/91645—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile by steps
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Package Closures (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

The invention concerns a method of continuously sealing the longitudinal seams in foil strips by heating and compressing overlapping foil strip regions. According to the invention, during the sealing phase, the foil strip regions to be sealed are heated a plurality of times (3, 5, 7, 9, 11), preferably in steps, and are guided at least once (4, 6, 8, 10) therebetween. The invention also concerns a corresponding sealing device.

Description

Die vorliegende Erfindung betrifft ein Verfahren und die entsprechende Vorrichtung zum Siegeln von Folienbahnen, insbesondere zum Herstellen von Folien-Schlauch­ beutelverpackungen, bei der die Folienbahnen während des Siegelvorgangs mindestens auch einmal geführt werden. Dieses Siegelverfahren hat den Vorteil, daß die bei der Siegelung entstehenden Siegelnähte glatter und damit zum einen ansehnlicher sind und zum anderen keine undichten Stellen aufweisen. Ferner können durch diese Art der Siegelung auch wesentlich höhere Verarbeitungsgeschwindigkeiten beim Siegeln erzielt werden.The present invention relates to a method and the corresponding device for sealing film webs, in particular for producing film tubes bag packaging in which the film webs during the Sealing process at least once. This sealing process has the advantage that the sealing seams created during the sealing are smoother and therefore on the one hand are more attractive and on the other hand have no leaks. Furthermore, this type of sealing can also be used to achieve significantly higher levels Processing speeds can be achieved when sealing.

Der Haltbarmachung von Lebensmitteln kommt in der heutigen Zeit eine immer größere Bedeutung zu. Neben der Konservierung durch Tiefkühlung werden auch immer öfter Lebensmittel in gasdichten Folien verpackt. Bei der Verpackung der Lebensmittel in solche Folien werden an die Verpackungsmaschinen zunehmend höhere Anforderungen in Bezug auf die Qualität der Verpackung und an die Verpackungsgeschwindigkeit gestellt.The preservation of food is always an issue today greater importance. In addition to preservation through freezing, too more and more food packaged in gas-tight films. When packing the Food in films of this type are increasingly being used on packaging machines higher requirements with regard to the quality of the packaging and the Packing speed set.

In der Regel werden die Lebensmittel wie zum Beispiel Brot oder Wurstwaren mit der Folie umhüllt und die Folie wird dann an einer oder mehreren Stellen versiegelt; d. h. die Teile der zu verbindenden Folienbahn werden erwärmt und miteinander verpreßt, so daß gasdichte Siegelnähte erhalten werden. Während die sogenannten Quersiegelnähte, die sich senkrecht zur Laufrichtung des zu verpackenden Produkts befinden, diskontinuierlich angebracht werden, erfolgt die Siegelung der sogenannten Längssiegelnähte, die in der Laufrichtung der Folienbahn des zu verpackenden Produkts angeordnet sind, fortlaufend. As a rule, foods such as bread or sausages are used with the Foil wrapped and the film is then sealed in one or more places; d. H. the parts of the film web to be connected are heated and pressed together, so that gastight sealing seams are obtained. While the so-called Cross seal seams that are perpendicular to the direction of the product to be packaged are discontinuously attached, the sealing of the So-called longitudinal sealing seams, which in the direction of the film web packaging product are arranged continuously.  

Speziell beim kontinuierlichen Erwärmen einer Folienbahn zur Herstellung einer Längssiegelnaht auf Vorrichtungen und nach Verfahren gemäß dem Stand der Technik hat es in der Vergangenheit immer wieder Probleme gegeben, weil sich die Folienbahnen beim Erwärmen verwerfen d. h. wellen. Durch diese Verwerfungen liegen die zu verbindenden Bereiche der Folienbahn beim anschließenden Verpressen nicht mehr exakt aufeinander, so daß die resultierende Längssiegelnaht faltig ist, eine ungleichmäßige Breite hat und unter Umständen Lufteinschlüsse aufweist. Im Extremfall ist die Siegelnaht so dünn, daß die Verpackungen undicht sind oder werden. Die Verwerfungen erhöhen sich mit zunehmender Verpackungs- d. h. Siegelgeschwindigkeit.Especially when continuously heating a film web to produce a Longitudinal sealing seam on devices and according to methods according to the state of the Technology has always had problems in the past, because the Discard film webs when heated d. H. waves. Because of these faults are the areas of the film web to be connected to the subsequent one No longer press exactly against each other, so that the resulting longitudinal seal seam is wrinkled, has an uneven width and may have air pockets having. In extreme cases, the sealing seam is so thin that the packaging leaks are or will be. The faults increase with increasing Packaging d. H. Sealing speed.

Der vorliegenden Erfindung liegt deshalb die Aufgabe zugrunde, ein Siegelverfahren und eine Vorrichtung zur Verfügung zu stellen, womit man die Siegelung von Längsnähten und die dazu benötigten Vorrichtungen so ändert, daß die Längssiegelnähte ohne Verwerfungen und Fehlstellen bei den hohen Siegelgeschwindigkeiten, die für moderne Verpackungsmaschinen üblich sind, hergestellt werden können.The present invention is therefore based on the object of a sealing method and to provide a device for sealing the Longitudinal seams and the devices required for this changes so that the Longitudinal seams without warping and missing parts at the high Sealing speeds that are common for modern packaging machines, can be produced.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Verfahren zum kontinuierlichen Siegeln von Folienbahnen durch Erwärmen und Zusammenpressen der Folienbahnen, so gestaltet wird, daß die überlappenden Bereiche der zu siegelnden Folienbahnen während der Siegelphase mehrfach vorzugsweise, stufenweise, erhitzt und dazwischen mindestens auch einmal geführt werden.The object is achieved in that the method for continuous sealing of film webs by heating and pressing together of the film webs is designed so that the overlapping areas of the sealing foil webs several times during the sealing phase, gradually, heated and in between at least once.

Stufenweise erhitzen bedeutet in diesem Zusammenhang, daß die Temperatur stufenförmig in Abhängigkeit von der Folien- bzw. Verpackungs-Geschwindigkeit bis zur abschließenden Siegeltemperatur erhöht wird.In this context, gradually heating means that the temperature in stages depending on the speed of the film or packaging is raised to the final sealing temperature.

Bei dem erfindungsgemäßen Verfahren erfolgen dabei die Erwärmung und die Führung des Siegelnahtbereichs der Folienbahn sequentiell, wobei der Siegelnahtbereich der Folie zunächst erwärmt wird. Bevorzugt werden bei dem erfindungsgemäßen Verfahren die zu siegelnden Bereiche der Folien während der Siegelphase 1-6 mal, besonders bevorzugt 2-4 mal geführt.In the method according to the invention, the heating and the Guiding the sealing seam area of the film web sequentially, the Sealing area of the film is first heated. Are preferred in the  The inventive method, the areas of the films to be sealed during the Seal phase carried out 1-6 times, particularly preferably 2-4 times.

Der Siegelnahtbereich der Folienbahn kann nach dem erfindungsgemäßen Verfahren mit jeder Art von Wärmezufuhr erwärmt werden, wobei die Erwärmung mit heißer Luft jedoch bevorzugt wird. Die Erwärmung sollte so geführt werden, daß sie am Anfang der Siegelphase relativ gering ist und dann mit zunehmender Lauflänge des Siegelbereichs der Folie, vorzugsweise in Abhängigkeit von der Folienlauf- bzw. Verpackungs-Geschwindigkeit, steigt, bis die gewünschte Siegeltemperatur erreicht wird.The sealing seam area of the film web can according to the invention Processes are heated with any type of heat, the heating being done with hot air is preferred. The warming should be conducted so that it is relatively small at the beginning of the sealing phase and then with increasing barrel length the sealing area of the film, preferably depending on the film running or Packing speed increases until the desired sealing temperature is reached becomes.

Das erfindungsgemäße Verfahren wird vorzugsweise zur Herstellung von Längssiegelnähten von Verpackungen eingesetzt. Bevorzugt kann das Verfahren zur Herstellung von Längssiegelnähten von Folien-Schlauchbeutelverpackungen, wie sie häufig zur Verpackung von Lebensmitteln, wie z. B. Brot-, Wurstwaren, Kuchen, Sandwichbroten, oder anderen Artikeln benötigt werden, verwendet werden.The process according to the invention is preferably used for the production of Longitudinal sealing seams of packaging used. The method for Manufacture of longitudinal seal seams for tubular film packaging such as these often for packaging food, such as. B. bread, sausages, cakes, Sandwich bread, or other items needed to be used.

Das erfindungsgemäße Verfahren kann besonders gut mittels einer erfindungsgemäßen Siegelvorrichtung durchgeführt werden, die Aufheizelemente zum Erwärmen und dazwischen mindestens ein Führungselement zum Führen der überlappenden, zu siegelnden Bereiche der Folienbahn aufweist.The method according to the invention can be performed particularly well by means of a sealing device according to the invention are carried out, the heating elements for heating and in between at least one guide element for guiding the has overlapping areas of the film web to be sealed.

Die Aufheiz- und die Führungselemente sind bei der erfindungsgemäßen Vorrichtung sequentiell angebracht, wobei die erfindungsgemäße Vorrichtung vorzugsweise 1-6, besonders bevorzugt 2-4 Führungselemente aufweist. In Laufrichtung der Folienbahn betrachtet ist konstruktiv immer zuerst ein Aufheizelement angebracht.The heating and guide elements are in the device according to the invention sequentially attached, the device according to the invention preferably 1-6, particularly preferably has 2-4 guide elements. In the direction of the From a design point of view, a heating element is always attached to the film web.

Der Abstand zwischen zwei Führungselementen sollte bei der erfindungsgemäßen Vorrichtung in Maschinenlaufrichtung vorzugsweise zwischen 20 und 70 mm liegen, wobei ein Abstand zwischen 30 und 50 mm besonders bevorzugt wird. The distance between two guide elements should be in the inventive The device in the machine direction is preferably between 20 and 70 mm, a distance between 30 and 50 mm is particularly preferred.  

Als bevorzugte Führungselemente werden bei der erfindungsgemäßen Vorrichtung nicht beheizte Rollenpaare verwendet, wobei jeweils an jede Seite des Siegelnahtbereichs eine Rolle angebracht ist. Der Anpressdruck der Rollen, der Abstand der Rollen zueinander sowie deren Neigung zur Folienlaufrichtung sind einstellbar. Die Rollen werden entweder aus hitzebeständigem Kunststoff, wie z. B. Teflon, oder aus Metall mit einer Gleitbeschichtung gefertigt. Der Durchmesser der Rollen sollte 10-50 mm, vorzugsweise von 15 bis 25 mm, betragen.The preferred guide elements in the device according to the invention not heated pairs of rollers used, each on each side of the Sealed seam area a roll is attached. The contact pressure of the rollers, the The distance between the rollers and their inclination to the film running direction adjustable. The roles are either made of heat-resistant plastic, such as. B. Teflon, or made of metal with a sliding coating. The diameter of the Rolls should be 10-50 mm, preferably from 15 to 25 mm.

Bevorzugte Aufheizelemente der erfindungsgemäßen Vorrichtung weisen Heißluftdüsen auf, wobei ein Aufheizelement mit einer oder mehreren solcher Heißluftdüsen ausgerüstet sein kann, die neben- und/oder untereinander angeordnet sind. Die Düsen sind vorzugsweise kreisförmig und haben vorzugsweise einen Durchmesser von 1 bis 2 mm.Show preferred heating elements of the device according to the invention Hot air nozzles, wherein a heating element with one or more such Hot air nozzles can be equipped, which are arranged side by side and / or one below the other are. The nozzles are preferably circular and preferably have one Diameter from 1 to 2 mm.

Vorzugsweise sind die Düsenbohrungen senkrecht zur Laufrichtung der Folie angebracht. Die Luftaustrittsbohrungen können aber auch schräg, in einem spitzen Winkel zur Laufrichtung der Folie angebracht sein. Bei einer erfindungsgemäßen Vorrichtung mit Heißluftdüsen ist besonders wichtig, daß die Luft durch eine Heizvorrichtung mit einer geringen thermodynamischen Trägheit erwärmt wird. Als Heizvorrichtung wird dafür vorzugsweise eine Heizspirale eingesetzt.The nozzle bores are preferably perpendicular to the running direction of the film appropriate. The air outlet holes can also be oblique, in one point Be attached to the direction of the film. In an inventive Device with hot air nozzles is particularly important that the air through a Heater is heated with a low thermodynamic inertia. As A heating coil is preferably used for this purpose.

Die erfindungsgemäße Siegelvorrichtung ist bevorzugt Teil einer automatischen Verpackungsmaschine. Eine solche automatische Verpackungsmaschine verpackt die Waren mit einer dünnen Folie aus synthetischen Polymeren, vorzugsweise gasdicht, wenn notwendig. Typischerweise ist diese Verpackungsmaschine vom Horizontaltyp und in der Lage eine Reihe von Verpackungsschritten vollautomatisch auszuführen. U.a. erfolgt kontinuierlich der Vorschub der Folie um eine Packungsformlänge, das Formen eines Beutels oder Schlauches aus diesem Teil der Folie, das Einfüllen des Verpackungsgutes in den Beutel oder Schlauch und das längs- und querseitige Siegeln des Beutels oder Schlauches zur Herstellung einer vorzugsweise gasdichten Verpackung automatisch. Die erfindungsgemäße Vorrichtung wird dabei zur kontinuierlichen Siegelung der Längsnaht des Beutels oder Schlauches eingesetzt.The sealing device according to the invention is preferably part of an automatic Packaging machine. Packed such an automatic packaging machine the goods with a thin film of synthetic polymers, preferably gastight if necessary. Typically this packaging machine is from Horizontal type and capable of a series of packaging steps fully automatically to execute. Among other things the film is fed continuously by one Package shape length, forming a bag or tube from this part the film, the filling of the packaging material into the bag or tube and that longitudinal and transverse sealing of the bag or tube to produce a preferably gas-tight packaging automatically. The invention  The device is used for the continuous sealing of the longitudinal seam of the bag or hose used.

Die erfindungsgemäße Siegelvorrichtung kann daher besonders vorteilhaft auf horizontal arbeitenden automatischen Schlauchbeutelmaschinen zur Verpackung von Lebensmitteln, speziell verderblichen Lebensmitteln wie Frischfleisch, Schinken, Wurst, Brot oder Kuchen eingesetzt werden.The sealing device according to the invention can therefore be particularly advantageous horizontal automatic packaging machine for packaging of foods, especially perishable foods such as fresh meat, ham, Sausage, bread or cake can be used.

Dazu wird die Folienbahn wird von der Folienrolle über Umlenkrollen während des Verpackungsvorgangs abgespult und mit Hilfe eines Faltkastens zu einem Schlauch geformt. In diesen vorgefertigten Schlauch werden die zu verpackenden Güter mit Hilfe eines horizontal laufenden Förderbands kontinuierlich eingeschoben. Gleichzeitig wird die Längsnaht des Schlauches gesiegelt und anschließend die Quernähte durch Quersiegelung angebracht. Zur Herstellung der Längsnaht wird die erfindungsgemäße Siegelvorrichtung eingesetzt.To do this, the film web is moved from the film roll over deflection rolls during the Unwrapping the packaging process and using a folding box to form a tube shaped. The goods to be packaged are included in this prefabricated hose Continuously pushed in with the help of a horizontally running conveyor belt. At the same time the longitudinal seam of the hose is sealed and then the Cross seams attached by cross sealing. To produce the longitudinal seam, the sealing device according to the invention used.

Die erfindungsgemäße Siegelung hat den Vorteil, daß die bei der Siegelung entstehenden Siegelnähte glatter und absolut dicht sind und eine gleichmäßigere Breite haben. Damit sind sie zum einen ansehnlicher und weisen zum anderen keine undichten Stellen auf. Ferner können durch diese Art der Siegelung auch höhere Verpackungsgeschwindigkeiten erzielt werden. Außerdem ist eine raschere Anpassung an unterschiedliche Verpackungsgeschwindigkeiten möglich.The sealing according to the invention has the advantage that the sealing resulting sealing seams are smoother and absolutely tight and a more uniform Have width. On the one hand, they are more attractive and on the other hand they don't have any leaks. Furthermore, this type of sealing can also be used for higher sealing Packaging speeds can be achieved. It is also faster Adaptation to different packaging speeds possible.

Die Erfindung wird u. a. im folgenden anhand der Fig. 1 und Fig. 2 erläutert.The invention is, inter alia, in the following Fig. 1 and Fig. 2 based explained.

Fig. 1 zeigt die erfindungsgemäße Vorrichtung in Draufsicht. Die Vorrichtung besteht aus zwei baugleichen Teilen (i und 2), die die Aufheiz- und die Führungselemente aufweisen. Die zu siegelnden überlappenden Bereiche der Folienbahn (1) laufen durch die Siegelvorrichtung von oben nach unten und werden zunächst von dem ersten Aufheizelement (3) erwärmt. Im weiteren Verlauf, werden die überlappenden Bereiche der Folienbahn dann durch das Führungselement (4) geführt, geglättet und zusammengepreßt, bevor sie des weiteren von dem 2. Aufheizelement (5) weiter erwärmt werden. Die Siegelnahtbereiche der Folienbahn passieren dann das Führungselement (6), das Aufheizelement (7), das Führungselement (8), das Aufheizelement (9), das Führungselement (10) und das Aufheizelement (11), um so bis zur Siegeltemperatur erwärmt und vollständig gesiegelt die erfindungsgemäße Vorrichtung zu verlassen. Fig. 1 shows the device according to the invention in plan view. The device consists of two identical parts (i and 2), which have the heating and the guide elements. The overlapping areas of the film web ( 1 ) to be sealed run through the sealing device from top to bottom and are first heated by the first heating element ( 3 ). In the further course, the overlapping areas of the film web are then guided through the guide element ( 4 ), smoothed and pressed together before they are further heated by the second heating element ( 5 ). The sealing seam areas of the film web then pass through the guide element ( 6 ), the heating element ( 7 ), the guide element ( 8 ), the heating element ( 9 ), the guide element ( 10 ) and the heating element ( 11 ), so that they are heated up to the sealing temperature and completely sealed to leave the device according to the invention.

Die Führungselemente (4, 6, 8, und 10) sind als Rollenpaare mit einer Höhe, die mindestens der Breite der herzustellenden Längssiegelnaht entspricht, ausgebildet.The guide elements ( 4, 6, 8 , and 10 ) are designed as pairs of rollers with a height that corresponds at least to the width of the longitudinal sealing seam to be produced.

Die Aufheizelemente (3, 5, 7, 9 und 11) umfassen 2 Reihen von Heißluftdüsen, die vertikal zur Laufrichtung der Folie angeordnet sind, wobei eine Reihe drei bis sieben Heißluftdüsen aufweist. Die Heißluftdüsen werden aus den Kanälen (12 und 13) mit heißer Luft gespeist, die ihrerseits mit den Kanälen (14 und 15) verbunden sind, in denen sich jeweils eine Heizspirale (16, 17) zur Aufheizung der Luft befinden, wie in Fig. 2 dargestellt.The heating elements ( 3 , 5 , 7 , 9 and 11 ) comprise 2 rows of hot air nozzles, which are arranged vertically to the running direction of the film, one row having three to seven hot air nozzles. The hot air nozzles are fed with hot air from the channels ( 12 and 13 ), which in turn are connected to the channels ( 14 and 15 ), in each of which there is a heating coil ( 16 , 17 ) for heating the air, as in FIG. 2 shown.

Die Fig. 2 zeigt die erfindungsgemäße Vorrichtung im Querschnitt in der Ebene A B. Die beiden baugleichen Teile (1 und 2) der erfindungsgemäßen Vorrichtung weisen die zu den Heißluftdüsen führenden Kanäle (12 und 13) auf, die ihrerseits mit der in den Kanälen (14 und 15) mit Hilfe einer Heizspirale (16 und 17) aufgeheizten Luft gespeist werden. Fig. 2 shows the device according to the invention in cross section in the plane A B. The two identical parts ( 1 and 2 ) of the device according to the invention have the channels ( 12 and 13 ) leading to the hot air nozzles, which in turn with the in the channels ( 14 and 15 ) with the help of a heating coil ( 16 and 17 ) heated air.

Claims (16)

1. Verfahren zum kontinuierlichen Siegeln der Längsnähte von Folienbahnen durch Erwärmen und Zusammenpressen überlappender Folienbahnbereiche, dadurch gekennzeichnet, daß die zu siegelnden Folienbahnbereiche während der Siegelphase mehrfach, vorzugsweise stufenweise, erhitzt und dazwischen mindestens auch einmal geführt werden.1. A process for the continuous sealing of the longitudinal seams of film webs by heating and compressing overlapping film web areas, characterized in that the film web areas to be sealed are heated several times, preferably stepwise, during the sealing phase and are guided at least once in between. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die zu siegelnden Folienbahnen 1-6 mal, bevorzugt 2-4 mal geführt werden.2. The method according to claim 1, characterized in that the to be sealed Foil sheets are guided 1-6 times, preferably 2-4 times. 3. Verfahren nach den Ansprüchen 1-2, dadurch gekennzeichnet, daß das Erwärmen der Folienbahnen mit heißer Luft erfolgt.3. Process according to claims 1-2, characterized in that the The film webs are heated with hot air. 4. Verfahren nach den Ansprüchen 1-3 zur Herstellung von Längssiegelnähten von Folien-Verpackungen.4. The method according to claims 1-3 for the production of longitudinal sealed seams of foil packaging. 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Verpackungen Folien-Schlauchbeutelverpackungen sind.5. The method according to claim 4, characterized in that the packaging Foil tubular bag packaging are. 6. Vorrichtung zum Siegeln von Folienbahnen, dadurch gekennzeichnet, daß die Vorrichtung Aufheizelemente (3, 5, 7, 9, 11) und dazwischen mindestens ein Führungselement (4, 6, 8, 10) zum Führen des Siegelnahtbereichs aufweist.6. Device for sealing film webs, characterized in that the device has heating elements ( 3 , 5 , 7 , 9 , 11 ) and in between at least one guide element ( 4 , 6 , 8 , 10 ) for guiding the sealing seam area. 7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Aufheizelemente und die Führungselemente sequentiell angebracht sind.7. The device according to claim 6, characterized in that the Heating elements and the guide elements are attached sequentially. 8. Vorrichtung nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Vorrichtung 1-6, bevorzugt 2-4, Führungselemente aufweist. 8. The device according to claim 6 or 7, characterized in that the Device 1-6, preferably 2-4, has guide elements.   9. Vorrichtung nach den Ansprüchen 6-8, dadurch gekennzeichnet, daß der Abstand zwischen zwei Führungselementen von 30 bis 70 mm, vorzugsweise 30 und 50 mm, in Folienlaufrichtung beträgt.9. Device according to claims 6-8, characterized in that the Distance between two guide elements of 30 to 70 mm, preferably 30 and 50 mm, in the direction of film travel. 10. Vorrichtung nach den Ansprüchen 6-9, dadurch gekennzeichnet, daß als Führungselement ein Rollenpaar verwendet wird.10. Device according to claims 6-9, characterized in that as Guide element a pair of roles is used. 11. Vorrichtung nach den Ansprüchen 6-10, dadurch gekennzeichnet, daß die Aufheizelemente wenigstens eine Heißluftdüse ausweisen.11. Device according to claims 6-10, characterized in that the Identify heating elements with at least one hot air nozzle. 12. Vorrichtung nach den Ansprüchen 6-11, dadurch gekennzeichnet, daß die Heißluftdüsen kreisförmig sind und einen Durchmesser von 1 bis 2 mm aufweisen.12. Device according to claims 6-11, characterized in that the Hot air nozzles are circular and 1 to 2 mm in diameter exhibit. 13. Vorrichtung nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß die Heizvorrichtung zur Erzeugung der Heißluft eine möglichst geringe thermodynamische Trägheit aufweist.13. The apparatus according to claim 11 or 12, characterized in that the Heating device for generating the hot air as low as possible has thermodynamic inertia. 14. Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß die Heizvorrichtung eine Heizspirale (16, 17) ist.14. The apparatus according to claim 13, characterized in that the heating device is a heating coil ( 16 , 17 ). 15. Verpackungsmaschine aufweisend eine Vorrichtung gemäß den Ansprüchen 6-14.15. Packaging machine having a device according to Claims 6-14. 16. Verpackungsmaschine nach Anspruch 15, dadurch gekennzeichnet, daß es eine horizontale automatische Form-Füll-Siegel-Maschine ist.16. Packaging machine according to claim 15, characterized in that it is a horizontal automatic form-fill-seal machine.
DE19702473A 1997-01-24 1997-01-24 Method and device for sealing film webs Withdrawn DE19702473A1 (en)

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DE19702473A DE19702473A1 (en) 1997-01-24 1997-01-24 Method and device for sealing film webs
AU59874/98A AU5987498A (en) 1997-01-24 1998-01-12 Method and device for sealing foil strips
PCT/EP1998/000125 WO1998032588A1 (en) 1997-01-24 1998-01-12 Method and device for sealing foil strips

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DE19702473A DE19702473A1 (en) 1997-01-24 1997-01-24 Method and device for sealing film webs

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2811935A1 (en) * 2000-07-18 2002-01-25 Windmoeller & Hoelscher THERMAL SEALING DEVICE

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104924597B (en) * 2015-05-21 2017-09-29 河北亿安精密塑胶制品有限公司 Whole window welding machine for door and window sealing strip

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1157764B (en) * 1960-12-14 1963-11-21 Basf Ag Device for the continuous welding of plastic foils
DE1479433A1 (en) * 1965-11-17 1969-09-18 Hans Lissner Device for making plastic bags
DE1939571A1 (en) * 1969-08-04 1971-02-11 Basf Ag Method and device for producing or closing bags by welding tube sections made of thermoplastics

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057125A (en) * 1960-12-29 1962-10-09 St Regis Paper Co Sealing process and apparatus
CH408395A (en) * 1963-02-19 1966-02-28 Holstein & Kappert Maschf Device for heat sealing plastic-coated papers or plastic films
DE19619558A1 (en) * 1996-05-14 1997-11-20 Focke & Co Device for connecting a tear strip with a film web

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1157764B (en) * 1960-12-14 1963-11-21 Basf Ag Device for the continuous welding of plastic foils
DE1479433A1 (en) * 1965-11-17 1969-09-18 Hans Lissner Device for making plastic bags
DE1939571A1 (en) * 1969-08-04 1971-02-11 Basf Ag Method and device for producing or closing bags by welding tube sections made of thermoplastics

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2811935A1 (en) * 2000-07-18 2002-01-25 Windmoeller & Hoelscher THERMAL SEALING DEVICE

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AU5987498A (en) 1998-08-18

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