DE102014208313A1 - Device for sealing a packaging - Google Patents
Device for sealing a packaging Download PDFInfo
- Publication number
- DE102014208313A1 DE102014208313A1 DE102014208313.3A DE102014208313A DE102014208313A1 DE 102014208313 A1 DE102014208313 A1 DE 102014208313A1 DE 102014208313 A DE102014208313 A DE 102014208313A DE 102014208313 A1 DE102014208313 A1 DE 102014208313A1
- Authority
- DE
- Germany
- Prior art keywords
- sealing
- film
- sonotrode
- anvil
- positioning means
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/841—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions
- B29C66/8416—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions of different thickness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/851—Bag or container making machines
- B29C66/8511—Bag making machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
- B29C66/92611—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by controlling or regulating the gap between the joining tools
- B29C66/92615—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by controlling or regulating the gap between the joining tools the gap being non-constant over time
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
- B29C66/9292—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
- B29C66/9292—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams
- B29C66/92921—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams in specific relation to time, e.g. pressure-time diagrams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material 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
- 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
- B29C66/824—Actuating mechanisms
- B29C66/8246—Servomechanisms, e.g. servomotors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7128—Bags, sacks, sachets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2170/00—Construction of flexible containers
- B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/26—Folding sheets, blanks or webs
- B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
- B31B70/266—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement involving gusset-forming
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/60—Uniting opposed surfaces or edges; Taping
- B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
- B31B70/642—Uniting opposed surfaces or edges; Taping by applying heat or pressure using sealing jaws or sealing dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
- B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
- B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
- B31B70/844—Applying rigid valves, spouts, or filling tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Package Closures (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Die Erfindung geht aus von einer Vorrichtung zur Siegelung einer Folie, mit zumindest einer Sonotrode (12) und einem Amboss (10), ein Positioniermittel (16) zur Verstellung von Sonotrode (12) und Amboss (10) relativ zueinander, ein Steuermittel (18) zur Ansteuerung der Positioniermittel (16), wobei das Steuermittel (18) das Positioniermittel (16) dergestalt ansteuert, dass es Sonotrode (12) und Amboss (10) in einen vorbestimmten Abstand (pe) zueinander bringt.The invention relates to a device for sealing a film, comprising at least one sonotrode (12) and an anvil (10), a positioning means (16) for adjusting the sonotrode (12) and anvil (10) relative to each other, a control means (18 ) for controlling the positioning means (16), wherein the control means (18) controls the positioning means (16) such that it brings Sonotrode (12) and anvil (10) in a predetermined distance (pe) to each other.
Description
Stand der TechnikState of the art
Die Erfindung geht aus von einer Vorrichtung zum Siegeln einer Verpackung nach der Gattung der unabhängigen Ansprüche. Aus der
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung anzugeben, die sich für das Verschweißen von Verpackungen mit unterschiedlicher Dicke entlang des Siegelprofils eignet. Diese Aufgabe wird gelöst durch die Merkmale des unabhängigen Anspruchs. The invention has for its object to provide a device which is suitable for the welding of packages of different thickness along the sealing profile. This object is solved by the features of the independent claim.
Vorteile der Erfindung Advantages of the invention
Die erfindungsgemäße Vorrichtung hat dem gegenüber den Vorteil, dass gerade bei solchen Verpackungsarten, die sich entlang des Siegelprofils durch unterschiedliche Foliendicken auszeichnen, eine sichere Siegelnaht erreicht wird. Zudem können heiße Oberflächen, die sich negativ auf das zu verpackende Produkt, wie beispielsweise Schokolade, auswirken, reduziert werden. Außerdem können Reinigungszeiten verkürzt werden. The device according to the invention has the advantage over that, especially in those types of packaging which are distinguished by different film thicknesses along the sealing profile, a secure sealing seam is achieved. In addition, hot surfaces that adversely affect the product to be packaged, such as chocolate, can be reduced. In addition, cleaning times can be shortened.
So ist erfindungsgemäß vorgesehen, auf Ultraschallsiegeln zurückzugreifen. Ultraschallsiegelsysteme umfassen üblicherweise eine Sonotrode mit Booster sowie einen Generator, um die Ultraschallfrequenz zu erzeugen. Weiterhin ist ein Amboss als Gegenfläche für die Sonotrode vorgesehen. Solche Systeme greifen üblicherweise auf eine Frequenz zwischen 20kHz und 35kHz zurück, um Schwingungen innerhalb der zu versiegelnden Folie zu erzeugen. Die durch die Schwingungen erzeugte Wärme führt zum Versiegeln der Folie bzw. Folienlagen, die im Kontakt zueinander stehen. Sonotrode und Amboss hingegen bleiben relativ kalt. Thus, it is provided according to the invention to resort to ultrasonic sealing. Ultrasonic sealing systems typically include a sonotrode with boosters and a generator to generate the ultrasonic frequency. Furthermore, an anvil is provided as a counter surface for the sonotrode. Such systems typically rely on a frequency between 20kHz and 35kHz to create vibrations within the film to be sealed. The heat generated by the vibrations leads to the sealing of the film or film layers which are in contact with one another. Sonotrode and anvil, however, remain relatively cold.
Die erfindungsgemäße Vorrichtung eignet sich nun gerade für solche Verpackungen, welche asymmetrisch aufgebaut sind. Darunter wird verstanden, dass die Dicke der zu versiegelnden Folienlagen entlang der Siegelfläche unterschiedlich ist. Dies ist beispielsweise der Fall bei einer sogenannten Doy-Style-Verpackung. Um die hochfrequenten Schwingungen der Sonotrode durch die Folie zum Amboss zu bringen, ist ein konstanter Druck in der Siegelfläche entscheidend. Bei symmetrischen Verpackungen ist daher die Parallelität der Siegelflächen (Sonotrode und Amboss) essentiell. Bei asymmetrischen Verpackungen bzw. Verpackungsstil reicht die Parallelität der Bewegung allein nicht aus, um ein optimales Siegelergebnis und eine luftdichte Verpackung zu erzielen. The device according to the invention is now suitable for packaging of the kind which is constructed asymmetrically. This is understood to mean that the thickness of the film layers to be sealed differs along the sealing surface. This is for example the case with a so-called Doy-style packaging. In order to bring the high-frequency vibrations of the sonotrode through the film to the anvil, a constant pressure in the sealing surface is decisive. For symmetrical packaging, therefore, the parallelism of the sealing surfaces (sonotrode and anvil) is essential. In asymmetric packaging or packaging style, the parallelism of the movement alone is not sufficient to achieve an optimal sealing result and an airtight packaging.
Zur Erzielung optimaler Siegelergebnisse ist erfindungsgemäß vorgesehen, Sonotrode und Amboss in einem ersten Schritt so zu verfahren, dass lediglich eine geringe effektive Oberfläche zum Einbringen der Ultraschallenergie vorgesehen ist. Die Siegelbacken berühren die Folie, bringen jedoch keinen Druck auf (sog. Kollisionswinkel). Dies erfolgt beispielsweise in dem Bereich, in dem sich die Folie faltet, beispielsweise in Form von vier Folienlagen. Während des Siegelvorgangs wird die Folie im Bereich der Siegelschicht aufschmelzen und die Siegelung in diesem Bereich ausbilden. Hierbei reduziert sich auch die Dicke in diesem Vierschichtbereich. Zu einem bestimmten Zeitpunkt wird dieser Vierschichtbereich so zusammengedrückt, dass eine effektive Oberfläche für einen Energietransfer auch für Zweischichtenbereich erfolgt. Es schließt sich somit der zweite Verfahrensschritt an. Während des zweiten Verfahrensschritts werden Sonotrode und Amboss aktiv in eine vorbestimmte Position gebracht, die mit einer vordefinierten Siegelkraft korrespondiert. Die vordefinierte Position ist eine Funktion der Dicke der Folie. To achieve optimum sealing results, it is provided according to the invention to move the sonotrode and anvil in a first step in such a way that only a small effective surface area is provided for introducing the ultrasound energy. The sealing jaws touch the film, but do not apply pressure (so-called collision angle). This takes place, for example, in the region in which the film folds, for example in the form of four film layers. During the sealing process, the film will melt in the area of the sealing layer and form the seal in this area. This also reduces the thickness in this four-layer area. At a certain point in time, this four-layer region is compressed in such a way that an effective surface for an energy transfer also takes place for two-layer regions. This is followed by the second process step. During the second process step, sonotrode and anvil are actively brought into a predetermined position which corresponds to a predefined sealing force. The predefined position is a function of the thickness of the film.
Auf diese Art und Weise kann eine geeignete Siegelung in diesem Zweifolienbereich, im Übergangsbereich zwischen dem Zwei- bis Vierschichtbereich und in dem Vierschichtbereich realisiert werden. Das Bedienpersonal muss lediglich die Dicke der Folie eingeben und die benötigte Siegelkraft. Ausgehend von diesen Parametern wird das System selbst tätig, immer die korrekte Position der Siegelbacken, nämlich Sonotrode und Amboss, in die entsprechende Endposition zu verfahren, so dass eine luftdichte gesiegelte Verpackung resultiert. Selbst bei einer Falte in der Seite oder einem zwei- bis sechsschichtigen Übergang wird die festgelegte Position der Siegelbacken erreicht mit einer höheren durchschnittlichen Siegelkraft, so dass der Zweischichtbereich geeignet und zuverlässig versiegelt wird. In this way, a suitable seal can be realized in this two-foil region, in the transition region between the two- to four-layer region and in the four-layer region. The operator only has to enter the thickness of the film and the required sealing force. Based on these parameters, the system itself operates always to move the correct position of the sealing jaws, namely sonotrode and anvil, into the corresponding end position, so that an airtight sealed packaging results. Even with a crease in the side or a two- to six-layer transition, the fixed position of the sealing jaws is achieved with a higher average sealing force, so that the two-layer area is suitably and reliably sealed.
Erfindungsgemäß sind unterschiedliche Lösungen möglich, um die Siegelbacken, nämlich Amboss und Sonotrode in die vorgegebene Position zu bringen. Besonders bevorzugt lässt sich anhand der Beziehung zwischen der Antriebswelle (prinzipiell die Encoderposition) des Servoantriebs und der Elastizitätskonstante des Gehäuses der Siegelvorrichtung in einer Kurve eine einfache Steuerung erreichen. In Kenntnis dieser Kurve kann die Siegelkraft eingestellt werden als Funktion der Encoderposition. According to the invention, different solutions are possible to bring the sealing jaws, namely anvil and sonotrode in the predetermined position. Particularly preferably, the relationship between the drive shaft (in principle the encoder position) of the servo drive and the elastic constant of the housing of the sealing device can be used to achieve simple control in a curve. Knowing this curve, the sealing force can be set as a function of the encoder position.
Bei einer alternativen Ausgestaltung wird zumindest ein Näherungssensor, bevorzugt zwei Näherungssensoren, verwendet, um die aktuelle Position zwischen der Sonotrode und dem Amboss zu ermitteln. Der Steueralgorithmus wie vorhin beschrieben, bleibt jedoch derselbe. Diese Lösung ist aufgrund der zusätzlichen Sensoren genauer, wenngleich nicht kostengünstiger oder anfälliger für Verschmutzung. In an alternative embodiment, at least one proximity sensor, preferably two proximity sensors, used to determine the current position between the sonotrode and the anvil. The control algorithm as described above, however, remains the same. This solution is more accurate, albeit less costly or more susceptible to contamination, due to the additional sensors.
Während des Siegelprozesses werden sich Sonotrode und Amboss erhitzen. Dies führt zu Ausdehnungen sowohl der Sonotrode wie auch des Ambosses, was zu einer unterschiedlichen Endposition der Siegelbacken führt wie theoretisch ermittelt. Da jedoch der Zusammenhang zwischen Temperatur und Ausdehnung bekannt ist, kann die Ausdehnung der Siegelbacken korrigiert werden in dem entsprechenden Positionieralgorithmus. During the sealing process the horn and the anvil will heat up. This leads to expansions of both the sonotrode and the anvil, resulting in a different end position of the sealing jaws as determined theoretically. However, since the relationship between temperature and expansion is known, the expansion of the sealing jaws can be corrected in the corresponding positioning algorithm.
Zeichnung drawing
Ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung und zugehörige Betriebsweise in der Zeichnung dargestellt und wird nachfolgend näher erläutert. An embodiment of the device according to the invention and associated operating mode shown in the drawing and will be explained in more detail below.
Es zeigen: Show it:
Zwischen einer Sonotrode
In einem nachfolgenden Schritt gemäß der zweiten Darstellung in
Nach einer gewissen Zeitspanne nach dem Zeitpunkt t1 wird zum Zeitpunkt te Ultraschallenergie zugeführt. Der entsprechende Trigger ist in
Im nachfolgenden Schritt gemäß der dritten Darstellung in
Im nachfolgenden Schritt gemäß der vierten Darstellung der
Bei dem Ausführungsbeispiel gemäß
Gemäß
Während des Start des Siegelprozesses sind die Siegelbacken
Im Falle eines unerwarteten Vorkommnisses, wie beispielsweise eine Falte in den Ecken würde dies wie eine Verschmelzung eines Zwei- bis Sechsschichtenbereichs behandelt werden. Der Algorithmus schließt die Siegelbacken
Somit erfolgt zusammenfassend die Ansteuerung der Siegelbacken
Die vorgegebene Endposition pe wird ermittelt in Abhängigkeit von der Dicke d der Folie
Für eine definierte Foliendicke d der Folie
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102004049375 A1 [0001] DE 102004049375 A1 [0001]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014208313.3A DE102014208313A1 (en) | 2014-05-05 | 2014-05-05 | Device for sealing a packaging |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014208313.3A DE102014208313A1 (en) | 2014-05-05 | 2014-05-05 | Device for sealing a packaging |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102014208313A1 true DE102014208313A1 (en) | 2015-11-05 |
Family
ID=54326067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102014208313.3A Withdrawn DE102014208313A1 (en) | 2014-05-05 | 2014-05-05 | Device for sealing a packaging |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102014208313A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004049375A1 (en) | 2004-10-09 | 2006-04-13 | Rovema Verpackungsmaschinen Gmbh | Method and device for positioning a welding jaw |
-
2014
- 2014-05-05 DE DE102014208313.3A patent/DE102014208313A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004049375A1 (en) | 2004-10-09 | 2006-04-13 | Rovema Verpackungsmaschinen Gmbh | Method and device for positioning a welding jaw |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R081 | Change of applicant/patentee |
Owner name: SYNTEGON PACKAGING SOLUTIONS B.V., NL Free format text: FORMER OWNER: ROBERT BOSCH GMBH, 70469 STUTTGART, DE |
|
R082 | Change of representative |
Representative=s name: DAUB, THOMAS, DIPL.-ING., DE |
|
R005 | Application deemed withdrawn due to failure to request examination |