DE9110488U1 - Device for overlapping welding of film edges - Google Patents

Device for overlapping welding of film edges

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Publication number
DE9110488U1
DE9110488U1 DE9110488U DE9110488U DE9110488U1 DE 9110488 U1 DE9110488 U1 DE 9110488U1 DE 9110488 U DE9110488 U DE 9110488U DE 9110488 U DE9110488 U DE 9110488U DE 9110488 U1 DE9110488 U1 DE 9110488U1
Authority
DE
Germany
Prior art keywords
pressure rollers
heating element
edges
roller rotation
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE9110488U
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German (de)
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE9110488U priority Critical patent/DE9110488U1/en
Publication of DE9110488U1 publication Critical patent/DE9110488U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror
    • B29C65/203—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror being several single mirrors, e.g. not mounted on the same tool
    • 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
    • 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
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B29C65/7835—Positioning the parts to be joined, e.g. aligning, indexing or centring by using stops
    • 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
    • B29C66/05—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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • 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
    • 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
    • B29C66/81469—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 next to the other in a single line transverse to the feed direction, e.g. shoulder to shoulder sonotrodes
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8163—Self-aligning to the joining plane, e.g. mounted on a ball and socket
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8223—Worm or spindle mechanisms
    • 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
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/865—Independently movable welding apparatus, e.g. on wheels
    • B29C66/8652—Independently movable welding apparatus, e.g. on wheels being pushed by hand or being self-propelling
    • B29C66/86521—Independently movable welding apparatus, e.g. on wheels being pushed by hand or being self-propelling being self-propelling
    • B29C66/86523—Independently movable welding apparatus, e.g. on wheels being pushed by hand or being self-propelling being self-propelling the traction being made on the seam
    • 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
    • B29C66/81411—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81417—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled being V-shaped
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

Beschreibung:Description:

Renald Kaminski, An der Friedensburg 2, W-5130 GeilenkirchenRenald Kaminski, An der Friedensburg 2, W-5130 Geilenkirchen

Vorrichtung zum überlappenden Verschweißen von FolienrändernDevice for overlapping welding of film edges

Die Erfindung betrifft eine Vorrichtung zum überlappenden Verschweißen von Folienrändern mit einem Heizkörper sowie mit Andrückrollen zur Führung der Folienränder.The invention relates to a device for the overlapping welding of film edges with a heating element and with pressure rollers for guiding the film edges.

Solche Vorrichtungen sind in der DE-OS 35 35 759, DE-OS 40 00 017 und dem DE-GM 88 16 287.7 beschrieben. Die Vorrichtungen dienen insbesondere der Verschweißung von Folien im Deponiebau. Dabei werden hohe Anforderungen an die Qualität der Verschweißung gestellt.Such devices are described in DE-OS 35 35 759, DE-OS 40 00 017 and DE-GM 88 16 287.7. The devices are used in particular for welding films in landfill construction. High demands are placed on the quality of the welding.

Beim Verschweißen der Folienränder verfährt die Vorrichtung entlang der beiden Kanten der Folien, wobei die Folienränder überlappend ausgelegt sind. Die Folienränder laufen dabei übereinander in die Vorrichtung ein und werden dann über einen im Regelfall keilförmig ausgebildeten Heizkörper geführt. Dieser keilförmige Heizkörper ist liegend angeordnet, d. h. die beiden nach hinten zur Keilspitze hin zusammenlaufenden Teilflächen liegen übereinander. Dabei ist der Heizkörper mit seinem stumpfen Ende zum Einlauf der Folienränder in die Vorrichtung hin gerichtet.When welding the edges of the film, the device moves along both edges of the film, with the edges of the film overlapping. The edges of the film run into the device one above the other and are then guided over a heating element, which is usually wedge-shaped. This wedge-shaped heating element is arranged horizontally, i.e. the two partial surfaces that converge towards the back towards the tip of the wedge lie one above the other. The heating element is directed with its blunt end towards the inlet of the edges of the film into the device.

Jede Keilfläche des Heizkörpers kann in je zwei Teilkeilflächen unterteilt sein, die Abstand zueinander haben und zwischen denen jeweils eine Nut verläuft. Der obere Folienrand wird dabei über die beiden oberen Teilkeilflächen und der untenliegende Folienrand über die beiden unteren Teilkeilflächen geführt. Beide jeweils übereinanderliegendenEach wedge surface of the radiator can be divided into two partial wedge surfaces, which are spaced apart from each other and between which there is a groove. The upper edge of the foil is guided over the two upper partial wedge surfaces and the lower edge of the foil is guided over the two lower partial wedge surfaces. Both of the two surfaces, which are located one above the other,

Teilkeilflächen vereinigen sich nach hinten in einer linienförmigen Keilspitze, wo die beiden Folienränder zusammengeführt werden.Partial wedge surfaces merge towards the back in a linear wedge tip, where the two foil edges are brought together.

Der Heizkörper weist mehrere Heizelemente auf, die für eine Erhitzung der als Heizflächen dienenden Keilflächen sorgen. Die Erhitzung geht dabei so weit, daß die Folienränder im Bereich der Teilkeilflächen derart plastifiziert werden, daß sie nach dem Zusammenführen miteinander verschweißt werden, und zwar wegen der im Abstand zueinanderliegenden Teilkeilflächen mittels zweier in entsprechendem Abstand parallel verlaufender Schweißnähte. Zwischen den Schweißnähten bildet sich ein Kanal, der zur Prüfung der Dichtheit der Schweißnähte an einem Ende verschlossen wird und in dessen anderes Ende Luft eingeführt wird. Tritt bei dieser Prüfung kein Luftverlust auf, sind die Schweißnähte in Ordnung.The radiator has several heating elements that heat the wedge surfaces that serve as heating surfaces. The heating goes so far that the edges of the film in the area of the partial wedge surfaces are plasticized in such a way that they are welded together after they are brought together, namely by means of two weld seams that run parallel and at the appropriate distance because the partial wedge surfaces are spaced apart. A channel is formed between the weld seams, which is closed at one end to test the tightness of the weld seams and air is introduced into the other end. If no air loss occurs during this test, the weld seams are OK.

Damit die Folienränder in Anlage an den Heizflächen des Heizkörpers vorbeigeführt und insbesondere anschließend mit dem für die Verschweißung erforderlichen Druck zusammengepreßt werden, sind im Bereich des Heizkörpers selbst und hinter dem Heizkörper Andrückrollen vorgesehen, und zwar für jede der beiden nebeneinanderliegenden Schweißnähte jeweils eine Andrückrolle. Soweit die Andrückrollen hinter dem Heizkörper liegen, sind jeweils zwei Andrückrollen übereinander angeordnet, um von beiden Seiten Druck auf die jeweils erhitzten Bereiche der Folienränder ausüben zu können. Jeweils ein Paar der hinter dem Heizkörper angeordneten Andrückrollen dient gleichzeitig als Vortriebsrollen, d. h. zumindest eine der Rollen ist mit einem Antrieb versehen, der die Folienränder in die Vorrichtung einzieht und hierüber die Vorrichtung vorwärts treibt.In order to ensure that the edges of the film are guided past the heating surfaces of the radiator and, in particular, are subsequently pressed together with the pressure required for welding, pressure rollers are provided in the area of the radiator itself and behind the radiator, one pressure roller for each of the two adjacent weld seams. If the pressure rollers are behind the radiator, two pressure rollers are arranged one above the other in order to be able to exert pressure on the heated areas of the edges of the film from both sides. A pair of pressure rollers arranged behind the radiator also serves as drive rollers, i.e. at least one of the rollers is provided with a drive that draws the edges of the film into the device and drives the device forwards.

Mit den bekannten Vorrichtungen gibt es insbesondere dann Schwierigkeiten mit der Qualität der Schweißnähte, wenn die Folienränder Unebenheiten aufweisen, beispielsweise profiliertWith the known devices, there are difficulties with the quality of the welds, especially when the foil edges are uneven, for example profiled

sind, eine unterschiedliche Dicke haben oder verschmutzt sind. Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so zu gestalten, daß auch in solchen Fällen eine einwandreie Schweißqualität gewährleistet ist.are of different thickness or are dirty. The invention is therefore based on the object of designing a device of the type mentioned at the beginning in such a way that perfect welding quality is guaranteed even in such cases.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß wenigstens ein Teil der Andrückrollen um wenigstens eine quer zur Rollendrehachse und horizontal verlaufende Schwenkachse verschwenkbar gelagert sind. Der Grundgedanke der Erfindung besteht also darin, wenigstens einen Teil der Andrückrollen so zu lagern, daß sie um eine quer zur Rollendrehachse und horizontal, d.h. im wesentlichen in Durchlaufrichtung der Folienränder verlaufende Schwenkachse kippen können. Auf diese Weise können sich die Andrückrollen wesentlich besser an die Oberfläche der Folienränder anpassen. Es kommt dann nicht zu ungleichmäßigen Druckverteilungen, welche die Ursache für eine schlechte Schweißqualität sein können. Außerdem wird vermieden, daß die Vorrichtung blockiert.This object is achieved according to the invention in that at least some of the pressure rollers are mounted so that they can pivot about at least one pivot axis that runs transversely to the roller rotation axis and horizontally. The basic idea of the invention is therefore to mount at least some of the pressure rollers so that they can tilt about a pivot axis that runs transversely to the roller rotation axis and horizontally, i.e. essentially in the direction of travel of the film edges. In this way, the pressure rollers can adapt much better to the surface of the film edges. This prevents uneven pressure distribution, which can be the cause of poor welding quality. In addition, the device is prevented from blocking.

In besonders bevorzugter Ausführungsform ist vorgesehen, daß wenigstens ein Andrückrollenpaar mit zwei schwenkbar gelagerten, in Durchlaufrichtung der Folienränder gesehen nebeneinander angeordneten Andrückrollen vorgesehen sind und daß die Andrückrollen des Andrückrollenpaars jeweils unabhängig voneinander auf einer gemeinsamen Rollenachse schwenkbar gelagert sind und auch diese Rollenachse um eine quer dazu und horizontal verlaufende Schwenkachse verschwenkbar gelagert ist. Diese doppelte Verschwenkbarkeit von zwei nebeneinander angeordneten Andrückrollen - jeweils eine Andrückrolle für jede Schweißnaht - hat eine besonders gute Anpassungsfähigkeit der Andrückrollen zur Folge. Es ist garantiert, daß die solchermaßen gelagerten Andrückrollen praktisch ausschließlich Linienkontakte zu den Folienrändern haben und daß sie den für die Anlage an den Heizkörper bzw. die Verschweißung der Folienränder notwendigen Druck ausüben.In a particularly preferred embodiment, it is provided that at least one pair of pressure rollers is provided with two pivotally mounted pressure rollers arranged next to one another as seen in the direction of travel of the film edges, and that the pressure rollers of the pair of pressure rollers are each pivotally mounted independently of one another on a common roller axis and that this roller axis is also pivotally mounted about a pivot axis running transversely and horizontally. This double pivotability of two pressure rollers arranged next to one another - one pressure roller for each weld seam - results in particularly good adaptability of the pressure rollers. It is guaranteed that the pressure rollers mounted in this way have practically only line contact with the film edges and that they exert the pressure necessary for the contact with the radiator or for the welding of the film edges.

Soweit eines der auf diese Weise schwenkbar gelagerten Andrückrollenpaare hinter dem Heizkörper angeordnet ist, kann es von Vorteil sein, wenn es jeweils einer Andrückrolle gegenüberliegt, die unverschwenkbar gelagert ist. Auf diese Weise wird eine zu große Beweglichkeit der Andrückrollen und damit die Gefahr vermieden, daß die Andrückrollen gegeneinander ausweichen. Wenn dies jedoch keine Gefahr darstellt, ist -es zweckmäßig, wenn beide Andrückrollenpaare jeweils doppelt verschwenkbar sind.If one of the pressure roller pairs pivoted in this way is located behind the radiator, it can be advantageous if it is opposite a pressure roller that is not pivoted. In this way, excessive mobility of the pressure rollers and thus the risk of the pressure rollers moving against each other is avoided. However, if this does not pose a risk, it is advisable if both pressure roller pairs can pivot twice.

Vorteilhafterweise ist die Rollenachse für das Andrückrollenpaar in der Mitte zwischen den Andrückrollen verschwenkbar gelagert und an den Seiten in Führungskäfigen derart geführt, daß sie nur um die Schwenkachse bewegbar ist, also eine Verschwenkung beispielsweise um die Hochachse vermieden wird.Advantageously, the roller axis for the pressure roller pair is pivotably mounted in the middle between the pressure rollers and is guided on the sides in guide cages in such a way that it can only be moved around the pivot axis, thus avoiding pivoting around the vertical axis, for example.

Solche Andrückrollenpaare können nicht nur hinter dem Heizkörper vorgesehen sein, sondern auch auf beiden Seiten des Heizkörpers angeordnet sein, damit die Andrückrollen auch in diesem Bereich Anpassungsbewegungen durchführen können.Such pressure roller pairs can be provided not only behind the radiator, but also on both sides of the radiator so that the pressure rollers can also carry out adjustment movements in this area.

Soweit auf beiden Seiten des Heizkörpers Andrückrollen zum Andrücken der Folienränder an den Heizkörper vorgesehen sind,-ist es zweckmäßig, daß auch diese Andrückrollen um eine quer zur Rollendrehachse und horizontal verlaufende Schwenkachse verschwenkbar gelagert sind. Dabei können auf jeder Seite des Heizkörpers auch jeweils zwei Andrückrollen nebeneinander vorgesehen sein, die unabhängig voneinander gelagert sind, also nicht auf einer gemeinsamen Rollendrehachse sitzen. Dies kann ausreichend sein, da diese Andrückrollen der Führung nur eines Folienrandes dienen.If pressure rollers are provided on both sides of the radiator to press the edges of the film onto the radiator, it is advisable for these pressure rollers to be mounted so that they can pivot around a pivot axis that runs horizontally and transversely to the roller rotation axis. Two pressure rollers can also be provided next to each other on each side of the radiator, which are mounted independently of each other and therefore do not sit on a common roller rotation axis. This can be sufficient, since these pressure rollers only serve to guide one edge of the film.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß auf beiden Seiten des Heizkörpers jeweils zwei Andrückrollen inIn a further embodiment of the invention, two pressure rollers are provided on both sides of the radiator in

Durchlauf richtung hintereinander angeordnet sind, wobei jeweils eine der Andrückrollen im Bereich des Heizkörpers mit zueinander parallelen Heizflächen und jeweils eine Andrückrolle im Bereich der keilförmig aufeinander zulaufenden Heizflächen angeordnet sind. Eine solche Anordnung hat den Vorzug, daß die Folienränder in beiden Abschnitten des sich nach hinten keilförmig zuspitzenden Heizkörpers zuverlässig an diesen angedrückt werden. Zur besseren Beweglichkeit sollten diejeweils zwei hintereinander angeordneten Andrückrollen an einer gemeinsamen, beweglichen Lagerbrücke gelagert sein, wobei die jeweilige Lagerbrücke zweckmäßigerweise federnd aufgehängt ist. Dabei sollte der jeweilige Träger derart wippenförmig aufgehängt sein, sie er um eine parallel zu den Rollendrehachsen der Andrückrollen verlaufende Achse verschwenkbar ist.are arranged one behind the other in the direction of flow, with one of the pressure rollers being arranged in the area of the heating element with parallel heating surfaces and one pressure roller being arranged in the area of the heating surfaces that converge in a wedge shape. Such an arrangement has the advantage that the edges of the film in both sections of the heating element, which tapers towards the back in a wedge shape, are reliably pressed against it. For better mobility, the two pressure rollers arranged one behind the other should be mounted on a common, movable bearing bridge, with the respective bearing bridge being suitably suspended on a spring. The respective carrier should be suspended in a rocker-like manner so that it can be pivoted about an axis that runs parallel to the roller rotation axes of the pressure rollers.

In der Zeichnung ist die Erfindung an Hand eines Ausführungsbeispiels näher veranschaulicht. Es zeigen:The invention is illustrated in more detail using an embodiment in the drawing. They show:

Figur (1) eine Seitenansicht derFigure (1) a side view of the

erfindungsgemäßen Vorrichtung;device according to the invention;

Figur (2) eine Rückansicht der Vorrichtung gemäßFigure (2) is a rear view of the device according to

Figur (1);Figure (1);

Figur (3) einen Querschnitt durch die VorrichtungFigure (3) shows a cross section through the device

gemäß den Figuren (1) und (2) in der Ebene A-A (Figur 1);according to figures (1) and (2) in plane A-A (Figure 1);

Figur (4) eine Teildarstellung einesFigure (4) is a partial view of a

Andrückrollenpaares der VorrichtungPressure roller pair of the device

den Figuren (1) bis (3) mit Teilschnittdarstellung undFigures (1) to (3) with partial sectional view and

Figur (5) eine Frontansicht einer derFigure (5) is a front view of one of the

AndrückroilePressure roller

der Vorrichtung gemäß den Figuren (1) bis (3) mit Teilschnittdarstellung.the device according to figures (1) to (3) with partial sectional view.

Die in den Figuren (1) bis (3) dargestellte Vorrichtung (1) weist ein Fahrgestell (2) mit zwei Fahrachsen (3, 4) auf, die im Bereich der vorderen Enden zwei Räder (5) und im Bereich des hinteren Endes eine Walze (6) tragen. Die Vorrichtung (I)' ist in Richtung des Pfeils A (Figur 1) verfahrbar.The device (1) shown in Figures (1) to (3) has a chassis (2) with two driving axles (3, 4) which carry two wheels (5) in the area of the front ends and a roller (6) in the area of the rear end. The device (I)' can be moved in the direction of arrow A (Figure 1).

Auf dem Fahrgestell (2), und zwar im Bereich des vorderen Endes, ist ein Träger (7) angeordnet, der - wie sich insbesondere aus den Figuren (2) und (3) ersehen läßt - so geformt ist, daß er im unteren Bereich einen zu der einen Seite hin offenen Einführschlitz (8) und im oberen Bereich einen zur anderen Seite hin offenen Einführschlitz (9) bildet. Selbstverständlich sind die Einführschlitze (8, 9) auch nach vorn und nach hinten hin offen.On the chassis (2), in the area of the front end, a support (7) is arranged which - as can be seen in particular from Figures (2) and (3) - is shaped in such a way that it forms an insertion slot (8) open on one side in the lower area and an insertion slot (9) open on the other side in the upper area. Of course, the insertion slots (8, 9) are also open to the front and to the rear.

An der Vorderwand des Trägers (7) ist eine nach oben hochstehende Trägerplatte (10) befestigt, an deren oberen Ende eine sich über die gesamte Breite der Vorrichtung (1) erstreckende, horizontale Gehäuseplatte (11) befestigt ist.An upwardly extending support plate (10) is attached to the front wall of the support (7), to the upper end of which a horizontal housing plate (11) extending over the entire width of the device (1) is attached.

Am hinteren Ende des Trägers (7) ist über eine Tragstange (12)' ein Heizkörper (13) angebracht. Er weist eine obere Heizfläche (14) und eine untere Heizfläche (15) auf, die beide nach hinten hin spitz zulaufen und sich an einer Keilspitze (16) vereinigen. Dabei können die Heizflächen (14, 15) - wie bei solchen Vorrichtungen zwecks Herstellung zweier parallel im Abstand zueinander verlaufender Schweißnähte üblich - auch quer zur Längsachse der Vorrichtung (1) aufgeteilt sein (vgl. DE-OS 35 35 759). Der Heizkörper (13) weist hier nicht näher dargestellte Heizstäbe auf, die für eine Beheizung der Heizflächen (14, 15) sorgen. Die mögliche Anordnung der Heizstäbe und ihre Steuerung ergeben sich aus derAt the rear end of the support (7) a heating element (13) is attached via a support rod (12). It has an upper heating surface (14) and a lower heating surface (15), both of which taper towards the rear and join at a wedge tip (16). The heating surfaces (14, 15) can also be divided transversely to the longitudinal axis of the device (1) - as is usual with such devices for the purpose of producing two weld seams running parallel and at a distance from one another (cf. DE-OS 35 35 759). The heating element (13) has heating rods (not shown in detail here) which ensure that the heating surfaces (14, 15) are heated. The possible arrangement of the heating rods and their control are shown in the

DE-OS 40 00 017 und DE-OS 35 35 759.DE-OS 40 00 017 and DE-OS 35 35 759.

Hinter der Keilspitze (16) des Heizkörpers (13) befinden sich eine obere Andrückrolle (17) und - gegenüberliegend - zwei untere Andrückrollen (18, 19). Die obere Andrückrolle (17) ist mit zwei im Abstand zueinander angeordneten Umfangsverzahnungen (20, 21) versehen, während die unteren Andrückrollen (18, 19) jeweils eine Stirnverzahnung (22, 23) tragen. Die Verzahnungen (20, 21, 22, 23) haben in etwa die gleiche Breite und liegen sich jeweils gegenüber (Figur 2).Behind the wedge tip (16) of the heating element (13) there is an upper pressure roller (17) and - opposite - two lower pressure rollers (18, 19). The upper pressure roller (17) is provided with two circumferential teeth (20, 21) arranged at a distance from one another, while the lower pressure rollers (18, 19) each have a spur tooth (22, 23). The teeth (20, 21, 22, 23) have approximately the same width and are located opposite one another (Figure 2).

Die obere Andrückrolle (17) ist auf einer Rollendrehachse (24) gelagert, welche an den hinteren Enden von zwei im wesentlichen waagerecht nach vorn gehenden Längslenkern (25, 26) gehalten ist. Die Längslenker (25, 26) sind an dem Träger (7) verschwenkbar gelagert. Ferner greift an der Rollendrehachse (24) ein U-förmiger Haltebügel (27) an, und zwar an beiden Seiten der Andrückrolle (17). Wie insbesondere aus Figur (1) zu ersehen ist, verläuft der Haltebügel (27) in der gezeigten Stellung schräg nach oben und umfaßt beidseitig eine hier verdeckte Spindelmutter, die auf einer horizontal und in Längsrichtung der Vorrichtung (1) verlaufenden Spindel (28) sitzt. Beidseits der Spindelmutter sind auf dem Haltebügel (27) Führungsrollen (29) gelagert, die sich an der Unterseite der Gehäuseplatte (11) abstützen.The upper pressure roller (17) is mounted on a roller pivot axis (24) which is held at the rear ends by two longitudinal control arms (25, 26) extending essentially horizontally to the front. The longitudinal control arms (25, 26) are pivotably mounted on the support (7). A U-shaped retaining bracket (27) also engages the roller pivot axis (24), namely on both sides of the pressure roller (17). As can be seen in particular from Figure (1), the retaining bracket (27) extends diagonally upwards in the position shown and on both sides comprises a spindle nut (covered here) which sits on a spindle (28) running horizontally and in the longitudinal direction of the device (1). Guide rollers (29) are mounted on the retaining bracket (27) on both sides of the spindle nut and are supported on the underside of the housing plate (11).

Die Spindel (28) ist im vorderen und im hinteren Bereich in an der Gehäuseplatte (11) befestigten Lagerplatten (30, 31) drehbar und axial verschieblich gelagert. Sie endet vor der vorderen Lagerplatte (30) in einer Kupplungshülse (32), mit der die Spindel (28) drehfest verbunden ist. Die Kupplungshülse (32) hat zwei gegenüberliegende Längsschlitze (33), in die ein Querstift (34) formschlüssig einfaßt, der in einer Antriebswelle (35) gehalten ist. Die Antriebswelle (35) ist durch einen hier nicht näher dargestellten Elektromotor drehbar. Sie ist im übrigen axial unverschieblich gelagert.The spindle (28) is mounted in the front and rear areas in bearing plates (30, 31) attached to the housing plate (11) so that it can rotate and move axially. It ends in front of the front bearing plate (30) in a coupling sleeve (32) to which the spindle (28) is connected in a rotationally fixed manner. The coupling sleeve (32) has two opposite longitudinal slots (33) into which a cross pin (34) fits in a form-fitting manner and is held in a drive shaft (35). The drive shaft (35) can be rotated by an electric motor (not shown in detail here). It is also mounted so that it cannot move axially.

Die Spindel (28) hat einen Gewindeabschnitt (36), auf dem die am Haltebügel (27) befindliche Spindelmutter sitzt. Im Bereich des vorderen Endes des Gewindeabschnittes (36) sitzt auf der Spindel (28) eine Anschlagscheibe (37), und zwar fest mit der Spindel (28) verbunden. Eine die Spindel (28) umgebende Schraubenfeder (39)The spindle (28) has a threaded section (36) on which the spindle nut located on the retaining bracket (27) sits. In the area of the front end of the threaded section (36) a stop disk (37) sits on the spindle (28) and is firmly connected to the spindle (28). A helical spring (39) surrounding the spindle (28)

stützt sich zwischen dieser Anschlagscheibe (37) und der vorderen Lagerplatte (30) ab.is supported between this stop disc (37) and the front bearing plate (30).

Das hintere Ende der Spindel (28) durchfaßt die hintere Lagerplatte (31) und steht nach hinten vor. Am freien Ende weist sie ebenfalls eine mit ihr fest verbundene Anschlagscheibe (40) auf. Zwischen dieser Anschlagscheibe (40) und der hinteren Lagerplatte (31) ist ebenfalls eine die Spindel (28) umgebende Schraubenfeder (41) angeordnet, die jedoch kürzer ist als der Abstand zwischen Anschlagplatte (40) und Lagerplatte (31). Auf diese Weise tritt diese Schraubenfeder (41) erst dann in Aktion, wenn die erste Schraubenfeder (39) schon um den Differenzbetrag zwischen dem vorerwähnten Abstand und der Länge der zweiten SchraubenfederThe rear end of the spindle (28) passes through the rear bearing plate (31) and protrudes to the rear. At the free end it also has a stop disk (40) firmly connected to it. Between this stop disk (40) and the rear bearing plate (31) there is also a coil spring (41) surrounding the spindle (28), which is, however, shorter than the distance between the stop plate (40) and the bearing plate (31). In this way, this coil spring (41) only comes into action when the first coil spring (39) has already been stretched by the difference between the aforementioned distance and the length of the second coil spring.

(41) zusammengedrückt ist und erhöht so die Federkraft.(41) is compressed and thus increases the spring force.

Die unteren Andrückrollen (18, 19) sind - wie sich insbesondere aus Figur (4) ersehen läßt - auf einer Rollendrehachse (42) gelagert, die mittig zwischen den beiden Andrückrollen (18, 19) in einem Lager (43) gehalten ist, welches in einem mit dem Fahrgestell (2) fest verbundenen Lagerbock (44) sitzt. Das Lager (43) läßt nicht nur eine Verdrehung der RollendrehachseThe lower pressure rollers (18, 19) are - as can be seen in particular from Figure (4) - mounted on a roller rotation axis (42) which is held centrally between the two pressure rollers (18, 19) in a bearing (43) which is located in a bearing block (44) firmly connected to the chassis (2). The bearing (43) not only allows a rotation of the roller rotation axis

(42) zu, sondern auch eine Verschwenkung der Rollendrehachse (42) um eine senkrecht zu ihr und horizontal verlaufende Schwenkachse (in Figur 4 senkrecht zur Zeichnungsebene), und zwar jeweils nach beiden Seiten hin um den in Figur (4) eingezeichneten Winkel a. Außenseitig ist die Rollendrehachse (42) in Käfigen (46, 47) geführt, und zwar dergestalt, daß die Rollendrehachse (42) in den Käfigen eine Vertikalbewegung(42) but also a pivoting of the roller rotation axis (42) about a pivot axis running perpendicular to it and horizontally (in Figure 4 perpendicular to the drawing plane), in each case to both sides by the angle a shown in Figure (4). On the outside, the roller rotation axis (42) is guided in cages (46, 47) in such a way that the roller rotation axis (42) in the cages has a vertical movement

ausführen kann, nicht jedoch eine Horizontalbewegung. Die Beweglichkeit der Rollendrehachse (42) ist also auf die Verschwenkung um die oben erwähnte Schwenkachse - abgesehen von der Drehbeweglichkeit - beschränkt.can perform a horizontal movement, but not a horizontal movement. The mobility of the roller rotation axis (42) is therefore limited to the pivoting around the pivot axis mentioned above - apart from the rotational mobility.

Die Andrückrollen (18, 19) sind über gleiche Lager (48) auf der Rollendrehachse (42) gelagert wie diese in dem Lagerbock (44). Die Andrückrollen (18, 19) können somit relativ zur Rollendrehachse (42) ebenfalls eine Schwenkbewegung ausführen, und zwar um den in Figur (4) eingezeichneten Winkel a nach beiden Seiten hin, d. h. um eine senkrecht zur Rollendrehachse (42) und horizontal verlaufende Schwenkachse (in Figur 4 senkrecht zur Zeichnungsebene). Auf diese Weise können sich die Andrückrollen (18, 19) so einstellen, daß sie zwar eine unterschiedliche Höhe einnehmen, jedoch parallele Drehachsen haben.The pressure rollers (18, 19) are mounted on the roller rotation axis (42) using the same bearings (48) as the latter in the bearing block (44). The pressure rollers (18, 19) can therefore also perform a pivoting movement relative to the roller rotation axis (42), by the angle a shown in Figure (4) to both sides, i.e. by a pivot axis running perpendicular to the roller rotation axis (42) and horizontally (in Figure 4 perpendicular to the plane of the drawing). In this way, the pressure rollers (18, 19) can adjust themselves so that they are at different heights but have parallel axes of rotation.

Neben den Andrückrollen (17, 18, 19) hat die Vorrichtung (1) zusätzlich noch Vortriebsrollen. Diese sind hier der Übersichtlichkeit halber nicht eingezeichnet und befinden sich hinter - in Figur (1) links von - den Andrückrollen (17, 18, 19). Zumindest einer der Vortriebsrollen ist mit einem elektrischen Antriebsmotor gekoppelt.In addition to the pressure rollers (17, 18, 19), the device (1) also has drive rollers. These are not shown here for the sake of clarity and are located behind - in figure (1) to the left of - the pressure rollers (17, 18, 19). At least one of the drive rollers is coupled to an electric drive motor.

Oberhalb und unterhalb der Heizflächen (14, 15) des Heizkörpers (13) sind ebenfalls insgesamt acht Andrückrollen (49, 50, 51, 52, 53, 54) - nur sechs davon sind in den Figuren sichtbar angeordnet. Je zwei Andrückrollen (49, 50) bzw. (51, 52) bzw. (53) bzw. (54) sind in einer sich in Längsrichtung erstreckenden Lagerbrücke (55, 56, 57, 58) hintereinander gelagert, und zwar derart, daß die jeweils vorderen Andrückrollen (49, 51) im Bereich der Horizontalabschnitte der Heizflächen (14, 15) liegen, während die jeweils hinteren Andrückrollen (50, 52, 53, 54) im Bereich der Keilabschnitte der Heizflächen (14, 15) liegen, weshalb die Lagerbrücken (55, 56, 57, 58) einen geknickten Verlauf haben. Jeweils zweiAbove and below the heating surfaces (14, 15) of the radiator (13) there are also a total of eight pressure rollers (49, 50, 51, 52, 53, 54) - only six of them are visible in the figures. Two pressure rollers (49, 50) or (51, 52) or (53) or (54) are mounted one behind the other in a bearing bridge (55, 56, 57, 58) extending in the longitudinal direction, in such a way that the front pressure rollers (49, 51) are located in the area of the horizontal sections of the heating surfaces (14, 15), while the rear pressure rollers (50, 52, 53, 54) are located in the area of the wedge sections of the heating surfaces (14, 15), which is why the bearing bridges (55, 56, 57, 58) have a bent course. Two

Lagerbrücken (55, 57) bzw. (56, 58) sind nebeneinander angeordnet, wobei ihr Abstand in etwa dem Abstand der unteren Andrückrollen (18, 19) bzw. der Umfangsverzahnungen (20, 21) entspricht.Bearing bridges (55, 57) or (56, 58) are arranged next to each other, with their spacing approximately corresponding to the spacing of the lower pressure rollers (18, 19) or the peripheral gears (20, 21).

Die Lagerbrücken (55, 56, 57, 58) sind an Blattfedern (59, 60, 61, 62) befestigt, die nach vorn gehen und dort im Träger (7) fest eingespannt sind. Die Lagerbrücken (55, 56, 57, 58) stehen also unter einer jeweils in Richtung auf den Heizkörper (13) gerichtete Vorspannung der Blattfedern (59, 60, 61, 62), wobei die Blattfedern auch eine Verschwenkung der Lagerbrücken (55, 56, 57, 58) um eine quer zur Längsachse der Vorrichtung (1) und horizontal verlaufende Achse zulassen.The bearing bridges (55, 56, 57, 58) are attached to leaf springs (59, 60, 61, 62) that extend forward and are firmly clamped in the support (7). The bearing bridges (55, 56, 57, 58) are therefore pre-tensioned by the leaf springs (59, 60, 61, 62) in the direction of the radiator (13), whereby the leaf springs also allow the bearing bridges (55, 56, 57, 58) to pivot about an axis that runs horizontally and transversely to the longitudinal axis of the device (1).

Die Anpassungsfähigkeit der Andrückrollen (49, 50, 51, 52, 53, 54) wird noch dadurch erhöht, daß sie in ähnlicher Weise wie die unteren Andrückrollen (18, 19) um eine sich in Länngsrichtung der Vorrichtung (1) horizontal verlaufende Schwenkachse verschwenkbar sind. Dies ergibt sich aus der Darstellung gemäß der Figur (5), die in teilweisem Querschnitt die Andrückrolle (50) darstellt. Die Andrückrolle (50) ist über ein Lager (63) auf einer Rollendrehachse (64) gelagert, wobei das Lager schalenförmig derart gestaltet ist, daß es die vorerwähnte Verschwenkung (in Figur 5 um eine Achse senkrecht zur Zeichnungsebene) zuläßt, so daß sich die Andrückrolle (50) in Bezug auf die Rollendrehachse (64) schräg stellen kann. Die Rollendrehachse (64) ist in der im Querschnitt U-förmigen Lagerbrücke (55) gehalten. Die übrigen Andrückrollen (49, 51, 52, 53, 54) sind in gleicher Weise gelagert.The adaptability of the pressure rollers (49, 50, 51, 52, 53, 54) is further increased by the fact that they can be pivoted in a similar way to the lower pressure rollers (18, 19) about a pivot axis that runs horizontally in the longitudinal direction of the device (1). This is evident from the illustration in Figure (5), which shows the pressure roller (50) in partial cross-section. The pressure roller (50) is mounted on a roller rotation axis (64) via a bearing (63), the bearing being designed in a shell-like manner in such a way that it allows the aforementioned pivoting (in Figure 5 about an axis perpendicular to the plane of the drawing), so that the pressure roller (50) can be positioned at an angle in relation to the roller rotation axis (64). The roller rotation axis (64) is held in the bearing bridge (55), which is U-shaped in cross-section. The remaining pressure rollers (49, 51, 52, 53, 54) are mounted in the same way.

Die vorbeschriebene Vorrichtung (1) arbeitet bei der Verschweißung zweier sich überlappender Folienränder wie folgt. Die Vorrichtung (1) wird durch die oben erwähnten, nicht näher dargestellten Vortriebsrollen, die sich an den schon miteinander verschweißten Folienrändern abstützen, nach vorn angetrieben. Dabei fahren die Folienränder in EinführschlitzeThe device (1) described above works as follows when welding two overlapping film edges. The device (1) is driven forward by the above-mentioned drive rollers (not shown in detail), which are supported by the film edges that have already been welded together. The film edges move into insertion slots

(8, 9) ein und gleiten dann über die Heizflächen (14, 15) des Heizkörpers (13). Sie werden durch die Andrückrollen (49, 50, 51, 52, 53, 54) auf die Heizflächen (14, 15) gedrückt, wobei sich die Andrückrollen (49, 50, 51, 52, 53, 54) den Oberflächen der Folienränder anpassen können. Durch den Heizkörper (13) werden die Folienränder auf ihren einander zugewandten Seiten auf Schweißtemperatur erhitzt. Sie gelangen dann über die Keilspitze (16) in den Bereich der oberen und unteren Andrückrollen (17, 18, 19).(8, 9) and then slide over the heating surfaces (14, 15) of the heating element (13). They are pressed onto the heating surfaces (14, 15) by the pressure rollers (49, 50, 51, 52, 53, 54), whereby the pressure rollers (49, 50, 51, 52, 53, 54) can adapt to the surfaces of the film edges. The heating element (13) heats the film edges on their sides facing each other to welding temperature. They then reach the area of the upper and lower pressure rollers (17, 18, 19) via the wedge tip (16).

Diese sind gegenüber der in Figur (1) gezeigten Lage so zugestellt worden, daß die beiden Folienränder mit dem erforderlichen Druck aufeinandergedrückt werden. Hierzu ist die Spindel (28) über die Kupplungshülse (32), die Antriebswelle (35) und den nicht dargestellten Elektromotor derart in Drehbewegung versetzt worden, daß der Haltebügel (27) über die Spindelmutter nach hinten versetzt worden ist. Auf Grund der gegebenen Kinematik führt diese Bewegung der Spindelmutter zu einer Verschwenkung der Längslenker (25, 26) und damit der oberen Andrückrolle (17) nach unten in Richtung auf die unteren Andrückrollen (18, 19). Der Spalt zwischen der oberen Andrückrolle (17) und unteren Andrückrollen (18, 19) ist dabei über die Spindel (28) feinfühlig einstellbar.These have been adjusted in relation to the position shown in Figure (1) so that the two edges of the film are pressed together with the required pressure. To do this, the spindle (28) has been set in rotation via the coupling sleeve (32), the drive shaft (35) and the electric motor (not shown) in such a way that the retaining bracket (27) has been moved backwards via the spindle nut. Due to the given kinematics, this movement of the spindle nut leads to a pivoting of the longitudinal control arms (25, 26) and thus the upper pressure roller (17) downwards in the direction of the lower pressure rollers (18, 19). The gap between the upper pressure roller (17) and lower pressure rollers (18, 19) can be finely adjusted via the spindle (28).

Sofern die Folienränder Unebenheiten aufweisen oder eingedrückte, nach außen vorstehende Steine mitschleppen, kann die obere Andrückrolle (17) federnd ausweichen. Die Ausweichbewegung überträgt sich über den Haltebügel (27) und die Spindelmutter auf die Spindel (28) und drückt diese nach vorn. Dabei stützt sie sich über die Anschlagscheiben (37, 40) an den Schraubenfedern (39, 41) ab, d. h. die Bewegung wird federnd abgefangen. Der Formschluß zwischen Spindel (28) und Antriebswelle (35) geht dabei nicht verloren, da die Längsschlitze (33) eine Axialbewegung der Spindel (28) in dieser Richtung zulassen. Damit auf die Spindel (28) keine Vertikalkräfte einwirken, stützt sich der Haltebügel (27) überIf the edges of the film are uneven or carry pressed-in stones that protrude outwards, the upper pressure roller (17) can give way by springing. The evasive movement is transferred via the retaining bracket (27) and the spindle nut to the spindle (28) and pushes it forwards. In doing so, it is supported by the stop disks (37, 40) on the coil springs (39, 41), i.e. the movement is absorbed by springing. The positive connection between the spindle (28) and the drive shaft (35) is not lost, as the longitudinal slots (33) allow axial movement of the spindle (28) in this direction. To ensure that no vertical forces act on the spindle (28), the retaining bracket (27) is supported by

die Führungsrollen (29) an der Unterseite der Gehäuseplatte (11) ab.the guide rollers (29) on the underside of the housing plate (11).

Im übrigen können sich die unteren Andrückrollen (18, 19) in ihrer Stellung an Unebenheiten der Folienränder so anpassen, daß die Druckbeanspruchung der Folienränder trotzdem möglichst gleichbleibend ist.Furthermore, the position of the lower pressure rollers (18, 19) can be adjusted to accommodate unevenness of the film edges so that the pressure load on the film edges remains as constant as possible.

Claims (11)

Ansprüche: Renald Kaminski, An der Friedensburg 2,W-5130 Geilenkirchen Vorrichtung zum überlappenden Verschweißen von FolienrändernClaims: Renald Kaminski, An der Friedensburg 2,W-5130 Geilenkirchen Device for overlapping welding of film edges 1. Vorrichtung zum überlappenden Verschweißen von Folienrändern mit einem Heizkörper sowie mit Andrückrollen zur Führung der Folienränder,1. Device for overlapping welding of film edges with a heating element and with pressure rollers for guiding the film edges, dadurch gekennzeichnet, daß wenigstens ein Teil der Andrückrollen (17, 18, 19, 49, 50, 51, 52, 53, 54) um wenigstens eine quer zur Rollendrehachse (42, 64) und horizontal verlaufende Schwenkachse verschwenkbar gelagert sind.characterized in that at least some of the pressure rollers (17, 18, 19, 49, 50, 51, 52, 53, 54) are pivotably mounted about at least one pivot axis running horizontally and transversely to the roller rotation axis (42, 64). 2. Vorrichtung nach Anspruch 1,2. Device according to claim 1, dadurch gekennzeichnet, daß wenigstens ein Andrückrollenpaar mit zwei schwenkbar gelagerten, in Durchlaufrichtung der Folienränder gesehen nebeneinander angeordneten Andrückrollen (18, 19) vorgesehen sind und daß die Andrückrollen (18, 19) jeweils unabhängig voneinander auf einer gemeinsamen Rollendrehachse (42) schwenkbar gelagert sind und auch diese Rollendrehachse (42) um eine quer dazu und horizontal verlaufende Schwenkachse verschwenkbar gelagert ist.characterized in that at least one pair of pressure rollers is provided with two pivotably mounted pressure rollers (18, 19) arranged next to one another as seen in the direction of travel of the film edges, and that the pressure rollers (18, 19) are each pivotably mounted independently of one another on a common roller rotation axis (42) and that this roller rotation axis (42) is also pivotably mounted about a pivot axis running transversely thereto and horizontally. 3. Vorrichtung nach Anspruch 2,3. Device according to claim 2, dadurch gekennzeichnet, daß wenigstens ein Andrückrollenpaar (18, 19) hinter dem Heizkörper (13) angeordnet ist und jeweils einer Andrückrolle (17) gegenüberliegt, die unverschwenkbar gelagert ist.characterized in that at least one pair of pressure rollers (18, 19) is arranged behind the heating element (13) and each is opposite a pressure roller (17) which is mounted so as to be non-pivotable. 4. Vorrichtung nach Anspruch 2 oder 3,4. Device according to claim 2 or 3, dadurch gekennzeichnet, daß die Rollendrehachse (42) in der Mitte zwischen den Andrückrollen (18, 19) verschwenkbar gelagert ist und an den Seiten in Führungskäfigen (46, 47) derart geführt ist, daß sie nur um die Schwenkachse bewegbar ist.characterized in that the roller rotation axis (42) is pivotably mounted in the middle between the pressure rollers (18, 19) and is guided at the sides in guide cages (46, 47) in such a way that it can only move about the pivot axis. 5. Vorrichtung nach einem der Ansprüche 2 bis 4,5. Device according to one of claims 2 to 4, dadurch gekennzeichnet, daß wenigstens ein Andrückrollenpaar auf beiden Seiten des Heizkörpers (13) angeordnet ist.characterized in that at least one pair of pressure rollers is arranged on both sides of the heating element (13). 6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß auf beiden Seiten des Heizkörpers (13) Andrückrollen (49, 50, 51, 52, 53, 54) zum Andrücken der Folienränder an den heizkörper (13) vorgesehen sind, wobei die Andrückrollen (49, 50, 51, 52, 53, 54) um eine quer zur Rollendrehachse (64) und horizontal verlaufende Schwenkachse verschwenkbar gelagert sind.6. Device according to one of claims 1 to 5, characterized in that pressure rollers (49, 50, 51, 52, 53, 54) for pressing the edges of the film onto the heating element (13) are provided on both sides of the heating element (13), the pressure rollers (49, 50, 51, 52, 53, 54) being mounted so as to be pivotable about a pivot axis running transversely to the roller rotation axis (64) and horizontally. 7. Vorrichtung nach Anspruch 6,7. Device according to claim 6, dadurch gekennzeichnet, daß auf jeder Seite des Heizkörpers (13) jeweils zwei Andrückrollen (49, 50, 51, 52, 53, 54) nebeneinander vorgesehen sind, die unabhängig voneinander gelagert sind.characterized in that on each side of the heating element (13) two pressure rollers (49, 50, 51, 52, 53, 54) are provided next to each other, which are mounted independently of each other. 8. Vorrichtung nach Anspruch 6 oder 7,8. Device according to claim 6 or 7, dadurch gekennzeichnet, daß auf beiden Seiten des Heizkörpers (13) jeweils zwei Andrückrollen (49, 50, 51, 52, 53, 54) in Durchlaufrichtung hintereinander angeordnet sind, wobei jeweils eine der Andrückrollen (49, 51) im Bereich des Heizkörpers (13) mit zueinander parallelen Heizflächen (14, 15) und jeweils eine der Andrückrollen (50, 52, 53, 54) im Bereich mit keilförmig aufeinander zulaufenden Heizflächen (14, 15) angeordnet sind.characterized in that on both sides of the heating element (13) two pressure rollers (49, 50, 51, 52, 53, 54) are arranged one behind the other in the direction of passage, whereby one of the pressure rollers (49, 51) is arranged in the area of the heating element (13) with heating surfaces (14, 15) parallel to one another and one of the pressure rollers (50, 52, 53, 54) is arranged in the area with heating surfaces (14, 15) converging in a wedge shape. 9. Vorrichtung nach Anspruch 8,9. Device according to claim 8, dadurch gekennzeichnet, daß die jeweils zwei hintereinander angeordneten Andrückrollen (49, 50, 51, 52, 53, 54) an einer gemeinsamen Lagerbrücke (55, 56, 57, 58) gelagert sind.characterized in that the two pressure rollers (49, 50, 51, 52, 53, 54) arranged one behind the other are mounted on a common bearing bridge (55, 56, 57, 58). 10. Vorrichtung nach Anspruch 9,10. Device according to claim 9, dadurch gekennzeichnet, daß die jeweilige Lagerbrücke (55, 56, 57, 58) federnd aufgehängt ist.characterized in that the respective bearing bridge (55, 56, 57, 58) is spring-mounted. 11. Vorrichtung nach Anspruch 9 oder 10,11. Device according to claim 9 or 10, daß die jeweilige Lagerbrücke (55, 56, 57, 58) derart wippenförmig aufgehängt ist, daß sie um eine parallel zu den Rollendrehachsen (64) der Andrückrollen (49, 50, 51, 52, 53, 54) verlaufende Schwenkachse verschwenkbar ist.that the respective bearing bridge (55, 56, 57, 58) is suspended in a rocker-like manner such that it can be pivoted about a pivot axis running parallel to the roller rotation axes (64) of the pressure rollers (49, 50, 51, 52, 53, 54).
DE9110488U 1991-08-24 1991-08-24 Device for overlapping welding of film edges Expired - Lifetime DE9110488U1 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2721854A1 (en) * 1994-06-29 1996-01-05 Kimberly Clark Co APPARATUS AND METHOD FOR JOINING CONTINUOUSLY MOVING SUBSTRATES
DE29719436U1 (en) * 1997-11-03 1998-02-26 Wegener Gmbh, 52074 Aachen Welding device
EP0949057A1 (en) * 1998-02-06 1999-10-13 Leister Process Technologies Pressing element for welding of sealing webs
DE102004025331A1 (en) * 2004-05-19 2005-12-22 Georg Andreas Huber Assembly to bond flat sections together along their butting edges, to form a three-dimensional hollow body, has carriers to support them for a hot air welding head to weld them at points along the joint between them
DE102005030211A1 (en) * 2005-06-29 2007-01-11 Robert Bosch Gmbh Roll sealing equipment for sealing films has sealing roll and swiveling heating roll onto which pressure is applied normal to their contact line by servomotor driving spindle and nut linked to linear guide supporting heating roll
EP1923203A1 (en) 2006-11-15 2008-05-21 Steinel GmbH Welding cart

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2721854A1 (en) * 1994-06-29 1996-01-05 Kimberly Clark Co APPARATUS AND METHOD FOR JOINING CONTINUOUSLY MOVING SUBSTRATES
EP0689930A3 (en) * 1994-06-29 1997-01-08 Kimberly Clark Co Apparatus and method for rotary bonding
GB2290747B (en) * 1994-06-29 1998-12-30 Kimberly Clark Co Apparatus and method for rotary bonding
DE29719436U1 (en) * 1997-11-03 1998-02-26 Wegener Gmbh, 52074 Aachen Welding device
US6186210B1 (en) 1997-11-03 2001-02-13 Wegener Gmbh Heat sealing device
EP0949057A1 (en) * 1998-02-06 1999-10-13 Leister Process Technologies Pressing element for welding of sealing webs
DE102004025331A1 (en) * 2004-05-19 2005-12-22 Georg Andreas Huber Assembly to bond flat sections together along their butting edges, to form a three-dimensional hollow body, has carriers to support them for a hot air welding head to weld them at points along the joint between them
DE102004025331B4 (en) * 2004-05-19 2006-08-24 Georg Andreas Huber Implement for joining blanks made of flat material
DE102005030211A1 (en) * 2005-06-29 2007-01-11 Robert Bosch Gmbh Roll sealing equipment for sealing films has sealing roll and swiveling heating roll onto which pressure is applied normal to their contact line by servomotor driving spindle and nut linked to linear guide supporting heating roll
EP1923203A1 (en) 2006-11-15 2008-05-21 Steinel GmbH Welding cart
US8567466B2 (en) 2006-11-15 2013-10-29 Steinel Gmbh Welding carriage

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