DE2727960C3 - Device for welding plastic films - Google Patents

Device for welding plastic films

Info

Publication number
DE2727960C3
DE2727960C3 DE2727960A DE2727960A DE2727960C3 DE 2727960 C3 DE2727960 C3 DE 2727960C3 DE 2727960 A DE2727960 A DE 2727960A DE 2727960 A DE2727960 A DE 2727960A DE 2727960 C3 DE2727960 C3 DE 2727960C3
Authority
DE
Germany
Prior art keywords
welding
hub
leg
core
unit
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
Application number
DE2727960A
Other languages
German (de)
Other versions
DE2727960B2 (en
DE2727960A1 (en
Inventor
Rudolf Ing.(grad.) 7441 Neckartenzlingen Wehinger
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE2727960A priority Critical patent/DE2727960C3/en
Publication of DE2727960A1 publication Critical patent/DE2727960A1/en
Publication of DE2727960B2 publication Critical patent/DE2727960B2/en
Application granted granted Critical
Publication of DE2727960C3 publication Critical patent/DE2727960C3/en
Expired 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/32—Induction
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7439—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc for continuously and longitudinally welding and severing 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
    • B29C66/40—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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8187—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects
    • B29C66/81871—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0008—Magnetic or paramagnetic

Description

4545

Die Erfindung bezieht sich auf eine Vorrichtung zum Verschweißen von Kunststoffolien, die ein auf einer Drehachse angeordnetes Schweißelement umfaßt, das mittels einer Induktionseinheit induktiv beheizt wird und relativ zur Transportrichtung der Folie eine Umlaufbewegung ausführt.The invention relates to a device for welding plastic films, which one on a Includes the axis of rotation arranged welding element which is inductively heated by means of an induction unit and executes a rotary movement relative to the transport direction of the film.

Bei einer bekannten Vorrichtung dieser Art ist das Schweißelement als magnetisierbare Vollscheibe ausgebildet, die ohne Zwischenisolation auf der Drehachse angeordnet ist und sich unmittelbar aufgrund von Wirbelströmen erhitzt (GB-PS 11 46 691). Eine solche Vorrichtung weist insofern gewisse Unzulänglichkeiten auf, als die Temperaturverhältnisse nicht so definiert und beherrschbar sind, wie es für eine betriebssichere Funktion erforderlich ist, und als in dem aus dem Gehäuse für die Erregerspule, der Vollscheibe und der Drehachse bestehenden Komplex beträchtliche Wärmeverluste entstehen. Des weiteren sind hierbei die Arbeitsgänge »Schneiden« und »Schweißen« nur alternativ durchführbar, indem für jeden dieser Vorgänge eine besondere, entsprechend ausgestaltete VollIn a known device of this type, the welding element is designed as a magnetizable solid disk, which is arranged on the axis of rotation without intermediate insulation and which is directly due to Eddy currents heated (GB-PS 11 46 691). Such The device has certain shortcomings in that the temperature conditions are not so defined and are controllable, as is necessary for a reliable function, and than in the one from the Housing for the excitation coil, the solid disk and the axis of rotation existing complex considerable heat losses develop. Furthermore, the "cutting" and "welding" operations are only here alternatively feasible by having a special, appropriately designed full for each of these processes

scheibe erforderlich istdisk is required

Zum Verschweißen von Kunststoffolien ist es auch schon bekannt, geeignet ausgebildete und angeordnete Schweißbacken mit wenigstens einem isoliert daran befestigten Heizband oder Heizdraht aus Widerstandsmaterial — im nachstehenden mit Heizelement bezeichnet — auszurüsten und das Heizelement auf elektrischem Weg zu erwärmen. Die Wärmezufuhr zum Heizelement ist dabei so zu bemessen, daß während des Schweißvorgangs gerade eine solche Erweichung der miteinander zu verbindenden Folienteile erzielt wird, daß eine zuverlässige und mechanisch feste Verschmelzung der betreffenden Folienteile entsteht. Die Einwirkungszeit der Schweißbacken auf die Folienteile ist dabei naturgemäß zeitlich zu begrenzen; sie hängt jewels von der Folienbeschaffenheit und Folienstärke sowie von der dem Heizelement zugeführten elektrischen Energie ab.For welding plastic films, it is also already known to be suitably designed and arranged Welding jaws with at least one heating band or heating wire made of resistance material and attached to it in an insulated manner - hereinafter referred to as heating element - to equip and the heating element electrical way to heat. The heat supply to the heating element is to be dimensioned so that during the Welding process just such a softening of the foil parts to be connected is achieved, that a reliable and mechanically strong fusion of the film parts concerned is created. The exposure time the welding jaws on the foil parts must of course be limited in time; she hangs jewels on the nature and thickness of the film and the electrical power supplied to the heating element Energy from.

Im Rahmen der Begrenzung der Wärmezufuhr zu den ■miteinander zu verbindenden Folienteilen wird häufig von der Möglichkeit Gebrauch gemacht, die Heizelemente der Schweißbacken ständig mit Energie zu versorgen, so daß sie dauernd eine bestimmte Grundtemperatur aufweisen, und sie jeweils nur während des periodisch erfolgenden Schweißvorgangs mit der vollen Heizleistung zu beaufschlagen. Auf diese Weise wird zwar eine gewisse Energiemenge gespart, jedoch geht dies zumindest in manchen Fällen auf Kosten der Schnelligkeit des jeweiligen Schweißvorgangs. As part of the limitation of the heat supply to the ■ foil parts to be connected to one another, made use of the possibility to constantly energize the heating elements of the welding jaws supply so that they always have a certain basic temperature, and each only to apply full heating power during the periodic welding process. To this In this way, a certain amount of energy is saved, but at least in some cases it works Cost of the speed of the respective welding process.

Eine andere Methode der begrenzten Wärmezufuhr zu den betreffenden Folienteilen besteht darin, die Heizelemente ständig mit der für den jeweiligen Schweißvorgang erforderlichen Wärmeenergie zu versorgen, so daß während der jeweils nur kurzen Einwirkungsdauer der Schweißbacken auf die Folien stets sofort der Verschmelzvorgang der Folien an der Schweißstelle einsetzt Hierdurch wird der Schweißvorgang etwas verkürzt und infolge dieser Zeitersparnis läßt sich die Leistung der gesamten Verpackungsmaschine unter Umständen erhöhen.Another method of limited heat input to the film parts concerned is to use the To constantly supply heating elements with the heat energy required for the respective welding process, so that during the short duration of action of the welding jaws on the foils the fusing process of the foils at the welding point always starts immediately. This starts the welding process somewhat shortened and as a result of this time saving, the performance of the entire packaging machine possibly increase.

Unabhängig davon, ob vom einen oder anderen der beiden mit Schweißbacken arbeitenden Schweißverfahren Gebrauch gemacht wird, ist in den meisten Fällen der Schweißvorgang mit einem Abtrennen der im Bereich der Schweißnaht aneinandergrenzenden Folienteile oder Folienabschnitte verbunden. Zu diesem Zweck kann die Schweißvorrichtung mit einem Trennmesser oder dergleichen Element kombiniert sein oder aber das Schweiß- bzw. Heizelement bewirkt zugleich auch das Abtrennen der benachbarten Folienabschnitte voneinander.Regardless of whether one or the other of the two welding processes that work with welding jaws In most cases, the welding process with cutting off the im Area of the weld seam adjoining film parts or film sections connected. To this For this purpose, the welding device can be combined with a cutting knife or a similar element or the welding or heating element also causes the neighboring ones to be cut off at the same time Foil sections from each other.

Im Falle der Versorgung der Heizelemente mit stets voller Wärmeenergie in Verbindung mit einer Vibration der Schweißbacken wurde hinsichtlich der Qualität der Schweißverbindungen ein durchaus zufriedenstellender Erfolg erzielt. Indessen ist der für eine derartige Gesamtvorrichtung erforderliche Aufwand an elektrischen und mechanischen Schaltelementen und Steuereinrichtungen nicht unerheblich und daher auch eine gewisse Störanfälligkeit gegeben.In the case of the supply of the heating elements with always full heat energy in connection with a vibration the welding jaw became a thoroughly satisfactory one in terms of the quality of the welded joints Success achieved. However, the expenditure required for such an overall device is electrical and mechanical switching elements and control devices are not insignificant and therefore also one given a certain susceptibility to failure.

Es ist Aufgabe der Erfindung, eine Vorrichtung zum Verschweißen von Kunststoffolien zu schaffen, die sich einerseits durch einen relativ geringen Schaltungsaufwand sowie einen vertretbaren Aufwand an mechanischen Bauteilen und zum andern durch eine optimale Betriebssicherheit auszeichnet, und bei der die einer magnetisierbafen Vollscheibe anhaftenden NachteileIt is the object of the invention to provide a device for welding plastic films, which on the one hand by a relatively low circuit expenditure and a reasonable expenditure on mechanical Components and, on the other hand, are characterized by optimal operational safety, and in which one magnetisierbafen full disk adhering disadvantages

vermieden sind.are avoided.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß das Schweißelement durch einen auf einer Nabe aus wärmefestem Isolierstoff angebrachten metallischen Ring verkörpert ist, der zugleich als Trenrielement dient und der einem Schenkel eines mittels einer Spule erregten Eisenkerns zugeordnet istAccording to the invention, this object is achieved in that the welding element is made up of a hub Heat-resistant insulating material attached metallic ring is embodied, which also serves as a Trenrielement and which is assigned to one leg of an iron core excited by means of a coil

Die Erfindung sowie deren Wirkungsweise werden im nachstehenden anhand der schematischen Zeichnung noch näher erläutert Es zeigtThe invention and its mode of operation are illustrated below with reference to the schematic drawing explained in more detail It shows

F i g. 1 eine Seitenansicht der Schweiß- und Trennvorrichtung, F i g. 1 a side view of the welding and cutting device,

F i g. 2 eine Ansicht längs des Schnittes A-B durch Fig. 1.F i g. 2 shows a view along section AB through FIG. 1.

Die Schweiß- und Trennvorrichtung gemäß F i g. 1 besteht aus einer über einen U-förmig gestalteten Eisenkern 2 geschobene Induktionsspule 1, aus einem Antriebsmotor 3 für die Rotation des mit diesem über eine Welle 4 mechanisch fest verbundenen Schweiß- und Trennelements 5, das durch einen Ring 6 aus leitendem Material verkörpert ist und in eine hitzebeständige Scheibe 7 aus einem geeigneten Kunststoff eingebettet ist, ferner aus magnetischen Nebenschlüssen in Form einer Platte 8 und eines Kernstücks 9 sowie aus einem Gegenhalter 10.The welding and cutting device according to FIG. 1 consists of a U-shaped Iron core 2 pushed induction coil 1, from a drive motor 3 for the rotation of the with this over a shaft 4 mechanically firmly connected welding and separating element 5, which is made by a ring 6 Conductive material is embodied and in a heat-resistant disc 7 made of a suitable plastic is embedded, furthermore from magnetic shunts in the form of a plate 8 and a core piece 9 as well as from a counter holder 10.

Die Funktionsweise der Schweißvorrichtung ist folgende:The functioning of the welding device is as follows:

Die miteinander zu verschweißenden Folienteile oder Folienseiten 11, 12 laufen, wie Fig.2 zeigt, in Pfeilrichtung in die Vorrichtung ein und werden von dem induktiv aufgeheizten Ring 6 erfaßt und verschweißt Gegebenenfalls wird der überschüssige Folienstreifen 13 gleich mit- oder unmittelbar danach abgetrenntThe film parts or film sides 11, 12 to be welded together run, as shown in FIG Direction of the arrow into the device and are detected by the inductively heated ring 6 and welded If necessary, the excess film strip 13 is removed immediately or immediately thereafter severed

Der Gegenhalter 10 ist hier als plattenförmiges Führungsteil ausgebildet, das eine dem Ring 6 gegenüberliegende Nut 14 aufweist Anstelle einer Führungsplatte kann auch eine Scheibe, ein Band oder ein ähnlich gestaltetes Bauteil vorgesehen sein.The counterholder 10 is designed here as a plate-shaped guide part that is attached to the ring 6 opposite groove 14 instead of a guide plate can also be a disk, a band or a similarly designed component can be provided.

Mittels des auf der Stirnseite 15 Magnetschenkels 16 seitlich verschiebbaren Kernstücks 9 ist der magnetische Querschnitt veränderbar, so daß bei gegebenem magnetischem Fluß die magnetische Induktion verändert und auf diese Weise eine Temperaturregelung erzielt werden kann.By means of the magnet leg 16 laterally displaceable on the end face 15, the magnetic Cross-section changeable so that the magnetic induction changes for a given magnetic flux and in this way temperature control can be achieved.

Der metallische Ring 6 kann auch als Segmentscheibe oder als ähnliches Element ausgebildet sein und mit dem Antriebsmotor, der zweckmäßigerweise für Reversierbetrieb geeignet ausgebildet ist, mittels einer elektromagnetischen Kupplung 17 wahlweise zu- und abschaltbar sein.The metallic ring 6 can also be designed as a segment disk or a similar element and with the Drive motor, which is expediently for reversing operation is suitably designed to be selectively switched on and off by means of an electromagnetic clutch 17 be.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (6)

Patentansprüche:Patent claims: 1. Vorrichtung zum Verschweißen von Kunststofffolien, umfassend ein auf einer Drehachse angeordnetes Schweißelement, das mittels einer Induktionseinheit induktiv beheizt wird und relativ zur Transportrichtung der Folie eine Umlaufbewegung ausführt, dadurch gekennzeichnet, daß das Schweißelement durch einen auf einer Nabe aus wärmefestern Isolierstoff angebrachten metallischen Ring verkörpert ist, der zugleich als Trennelement dient und der einen Schenkel eines mittels einer Spule erregten Eisenkerns zugeordnet ist1. A device for welding plastic films, comprising a device arranged on an axis of rotation Welding element that is inductively heated by means of an induction unit and relative to the The transport direction of the film executes a circular movement, characterized in that the welding element by means of a metallic ring attached to a hub made of heat-resistant insulating material is embodied, which also serves as a separating element and one leg of a by means of a coil energized iron core is assigned 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Einheit Isolierstoffnabe-metallischer Ring im Luftspalt einer einen magnetischen Kreis bildenden Kern-Jochanordnung liegt2. Apparatus according to claim 1, characterized in that the unit insulating hub-metallic Ring lies in the air gap of a core-yoke assembly forming a magnetic circuit 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Eisenkern U-förmig ausgebildet ist, die Einheit Nabe-Ring dem einen Kernschenkel räumlich vorgeordnet ist und das der Einheit Nabe-Ring vorgelagerte Joch als auch einem ferromagnetischen Material bestehende Abdeckplatte ausgebildet ist.3. Apparatus according to claim 1 or 2, characterized in that the iron core is U-shaped is, the hub-ring unit is spatially upstream of one core leg and that of the Unit hub-ring upstream yoke as well as a ferromagnetic material cover plate is trained. 4. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwischen dem freien Schenkel des U-förmigen Eisenkerns und dem Joch ein entlang der Stirnseite dieses Schenkels verschiebbares Kernstück zur wahlweisen Veränderung des magnetischen Querschnitts vorgesehen ist.4. Device according to one or more of the preceding claims, characterized in that that between the free leg of the U-shaped iron core and the yoke along the front of this leg displaceable core piece for the optional change of the magnetic Cross-section is provided. 5. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß dem metallischen Ring im Einwirkungsbereich auf die Folie eine wenigstens in dieser Zone mit einem Schlitz versehene Führungsplatte gegenüberliegt. 5. Device according to one or more of the preceding claims, characterized in that that the metallic ring in the area of action on the film has at least one in this zone opposite a slot provided guide plate. 6. Vorrichtung nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß der metallische Ring mit seiner Nabe aus wärmefestem Isolierstoff auf einer eine Reversierbewegung ausführenden Welle angeordnet ist.6. Device according to claims 1 to 5, characterized in that the metallic ring with its hub made of heat-resistant insulating material on a shaft that executes a reversing movement is arranged.
DE2727960A 1977-06-22 1977-06-22 Device for welding plastic films Expired DE2727960C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2727960A DE2727960C3 (en) 1977-06-22 1977-06-22 Device for welding plastic films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2727960A DE2727960C3 (en) 1977-06-22 1977-06-22 Device for welding plastic films

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DE2727960A1 DE2727960A1 (en) 1979-01-18
DE2727960B2 DE2727960B2 (en) 1981-03-12
DE2727960C3 true DE2727960C3 (en) 1981-10-22

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DE2727960A Expired DE2727960C3 (en) 1977-06-22 1977-06-22 Device for welding plastic films

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006008622A1 (en) * 2006-02-24 2007-08-30 Rehau Ag + Co Separating apparatus for cutting plastics profiles to length, has metallic separating blade heated by induction heating coil spaced from blade, giving accurate temperature control and good cutting performance

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000229605A (en) * 1999-02-08 2000-08-22 Sig Pack Syst Ag Vertical welding and cutting apparatus for packaging tube material made of thermoplastic film for particularly tubular bag material packaging device
DE19921546B4 (en) * 1999-05-11 2004-03-25 Friedrich Von Rohrscheidt Folienlaminator
DE10013626C1 (en) * 2000-03-18 2001-06-13 Friedrich Von Rohrscheidt Method to clean components of film laminator contacting document to be laminated during its operation; involves passing absorbent, at least partly impregnated thing cleaning body through laminator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1393164A (en) * 1964-05-14 1965-03-19 Fmc Corp Cutting and welding device
GB1146691A (en) * 1964-12-30 1969-03-26 Beanwy Electric Ltd Improvements in, or relating to, induction heated appliances for sealing, serrating or cutting thermoplastic sheets or the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006008622A1 (en) * 2006-02-24 2007-08-30 Rehau Ag + Co Separating apparatus for cutting plastics profiles to length, has metallic separating blade heated by induction heating coil spaced from blade, giving accurate temperature control and good cutting performance

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Publication number Publication date
DE2727960B2 (en) 1981-03-12
DE2727960A1 (en) 1979-01-18

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