DE872390C - Device for dielectric seam welding on thermoplastics - Google Patents

Device for dielectric seam welding on thermoplastics

Info

Publication number
DE872390C
DE872390C DET3419A DET0003419A DE872390C DE 872390 C DE872390 C DE 872390C DE T3419 A DET3419 A DE T3419A DE T0003419 A DET0003419 A DE T0003419A DE 872390 C DE872390 C DE 872390C
Authority
DE
Germany
Prior art keywords
high frequency
counter electrode
dielectric
frequency generator
seam welding
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
DET3419A
Other languages
German (de)
Inventor
Arthur Schmidt
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.)
Telefunken AG
Original Assignee
Telefunken AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefunken AG filed Critical Telefunken AG
Priority to DET3419A priority Critical patent/DE872390C/en
Application granted granted Critical
Publication of DE872390C publication Critical patent/DE872390C/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
    • 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
    • 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
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • 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
    • B29C66/70—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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/82—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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/861—Hand-held tools

Description

Vorrichtung zur dielektrischen Nahtschweißung an thermoplastischen Kunststoffen Es ist bereits eine Vorrichtung zur dielektrischen Nahtschweißung an thermoplastischen Kunststofffolien mit mindestens einer mit der Hochfrequenzenergie beschickten Elektrode angegeben worden, welche an einem auf Rädern oder Platten oder Gleitschienen laufenden, den Hochfrequenzerzeuger tragenden Wagen befestigt ist und mit diesem längs der zu verschweißenden Naht der auf einer Unterlage ausgebreiteten und mit der Naht ahereinandergelegten Folien geführt wird, wobei eine unter den Kunststoffolien liegende leitende Schicht, z. B. eine Metallfolie, als Gegenelektrode dient.Device for dielectric seam welding on thermoplastic Plastics A device for dielectric seam welding is already on thermoplastic plastic films with at least one with the high frequency energy charged electrode has been specified, which is attached to a wheel or plate or slide rails mounted carriage carrying the high frequency generator is and with this along the seam to be welded is spread out on a base and with the seam is guided one on top of the other foils, one under the Plastic film lying conductive layer, z. B. a metal foil as a counter electrode serves.

Diese Vorrichtung ist besonders für die Bearbeitung großer Stücke oder ganzer Bahnen des Kunststoffes geeignet. Die Kunststoffbahnen werden dabei nicht bewegt. Sie können auf der Unterlage vor dem Beginn des Schweißvorganges in die richtige Lage zueinander gebracht werden. This device is especially useful for processing large pieces or entire lengths of plastic. The plastic sheets are doing this not moved. You can on the pad before starting the welding process in the right position to each other.

In Abb. I ist eine derartige Vorrichtung schematisch dargestellt. Auf der von den Trägern 4 gehaltenen Schiene I läuft mit den Rollen 2 und 3 der Wagen 5, in welchem der Hochfrequenzerzeuger untergebracht ist. Die obere Schweißelektrode wird durch die Rolle 6 gebildet, die mit der einen, vorzugsweise mit der gegen Erde Spannung führenden Ausgangsklemme des Hochfre.quenzerzeugers verhunden ist. Diese Rolle wird durch eine aus vier Hebeln mit einer Zugfeder gebildete Spreize nachgiebig gegen die miteinander zu verschweißenden Folien gedrückt. In Abb. I ist die Vorrichtung ohne aufgelegte Folien dargestellt. Daher legt die Rolle 6 direkt an. der Gegenelektrode I6 an, welche durch eine in die Platte des Tisches I2 eingelassene metallische Schiene gebildet wird. Diese Gegenelektrode, welche vorzugsweise den Erdungspunkt. des Hochfrequenzkreises bildet, steht über die Träger 4 auch leitend mit der Laufschiene 1 und über die Rollen 2, 3 mit dem Wagenkasten 5 in Verbindung. Auf diesem Wege könnte also auch die Verbindung der Gegenelektrode 16 mit der anderen Klemme des Hochfrequenzerzeugers erfolgen. Such a device is shown schematically in FIG. On the held by the carriers 4 rail I runs with the rollers 2 and 3 of the Car 5, in which the high frequency generator is housed. The upper welding electrode is formed by the role 6, which with the one, preferably with the against earth The live output terminal of the high-frequency generator is connected. These The role is flexible by a spreader formed from four levers with a tension spring pressed against the foils to be welded together. In Fig. I is the device shown without applied foils. Therefore, the role 6 creates directly. the counter electrode I6, which through one embedded in the top of table I2 metallic rail is formed. This counter electrode, which is preferably the Grounding point. of the high-frequency circuit is also conductive via the carrier 4 with the running rail 1 and via the rollers 2, 3 with the car body 5 in connection. In this way, the connection of the counter electrode 16 to the other could also be Terminal of the high frequency generator.

Praktische Versuche mit einer solchen Vorrichtung und mit der erwähnten Verbindung. der Gegenelektrode 16 über die Laufschiene 1 und die Rollen 2, 3 haben ergeben, daß die Schweißnaht in Abhängigkeit von der Stellung des Wagens 5 ungleichmäßig ausfällt. Als Ursache wurde der wechselnde Hochfrequenzwiderstand zwischen dem Wagen und der Gegenelektrode erkannt, der besonders dann eine wesentliche Rolle spielt, wenn die Umweglänge in die Größenordnung eines Viertels der Betriebswellenlänge kommt. Als Abhilfe wäre eine Verbindung von unveränderlicher und nicht zu großer Länge vom Hochfrequenzerzeuger zur Gegenelektrode geeignet. Eine solche Verbindung läßt sich aber wegen der großen Flächenausdehnung der zu behandelnden Kunststofffolien, welche meist die ganze Arbeitsfläche der Vorrichtung bedecken und noch über die Ränder herabhängen, nicht ohne weiteres vorsehen. Eine Lösung dieses Problems bildet die kapazitive Verbindung durch die zu behandelnde Kunststoffolie hindurch. Erfindungsgemäß wird eine vom Hochfrequenzerzeuger zur Gegenelektrode 16 führende,m für die Hochfrequenzströme durchlässige Verbindung in der Weise vorgesehen, daß auf die Oberseite einer Folie 10, welche über der mit der Gegenelektrode 16 verbundenen leitenden Schicht 11 liegt, ein flächenhafter Leiter, z. B. ein Blech 14, gelegt ist, mit welchem über ein die Wagenbewegungen mitmachendes Kontaktstück 15 eine leitende Verbindung zum Ausgang des Hochfrequenzerzeugers hergestellt ist. Practical experiments with such a device and with the one mentioned Link. of the counter electrode 16 via the running rail 1 and the rollers 2, 3 show that the weld seam depending on the position of the carriage 5 is uneven fails. The cause was the changing high frequency resistance between the cars and the counter electrode recognized, which plays a particularly important role when the detour length is on the order of a quarter of the operating wavelength comes. A remedy would be a connection of immutable and not too large Length from the high frequency generator to the counter electrode suitable. Such a connection but because of the large area of the plastic films to be treated, which usually cover the entire work surface of the device and still over the The edges hang down, do not simply provide for it. Forms a solution to this problem the capacitive connection through the plastic film to be treated. According to the invention becomes a leading from the high frequency generator to the counter electrode 16, m for the high frequency currents permeable connection provided in such a way that on top of a film 10, which lies over the conductive layer 11 connected to the counter electrode 16, a planar conductor, e.g. B. a sheet 14 is placed, with which on a the Contact piece 15, which participates in vehicle movements, provides a conductive connection to the output of the high frequency generator is made.

In Abb. 2 ist ein Ausführungsbeispiel der Vorrichtung nach der Erfindung dargestellt. Vom-Hochfrequenzerzeuger in dem Wagenkasten 5 führt die Leitung 13 zu der Rollenelektrode 6. Unter dieser befindet sich die Gegenelektrode 16, welche mit der geerdeten leitenden Schicht 11 in Verbindung steht. Eine kurze und unveränderliche leitende Verbindung der Gegenelektrode mit der anderen Klemme des Hochfrequenzerzeugers wird durch die Kunststoffoiien 9 und 10 behindert, welche die Arbeitsfläche der Vorrichtung im allgemeinen völlig bedecken und über die Ränder seitlich noch herabhängen. Zur kapazitiven Durchführung des Hochfrequenzstroms von der unten liegenden Gegenelektrode 16 zu der Ausgangsklemme des Hochfrequenzerzeugers dient die. Bllechplatte 14. Sie ist auf die Folie 10 aufgelegt und hat mindestens die Lange der auszuführenden Naht, so daß der Schleifer mit dem Kontaktstück 15 ständig eine leitende Verbindung der Blechplatte mit der Ausgangsklemme herstellt. Der Hochfrequenzstrom wird so auf einem kurzen Weg von unveränderlicher Länge von der Gegenelektrode 16 durch die Kunststoffolie zur Ausgangsklemmen geführt. In Fig. 2 is an embodiment of the device according to the invention shown. The line 13 leads from the high-frequency generator in the car body 5 to the roller electrode 6. Below this is the counter electrode 16, which is connected to the grounded conductive layer 11. A short and unchangeable one Conductive connection of the counter electrode to the other terminal of the high frequency generator is hindered by the Kunststoffoiien 9 and 10, which the working surface of the Generally cover the device completely and still hang down laterally over the edges. For the capacitive implementation of the high-frequency current from the counter electrode below 16 to the output terminal of the high frequency generator is used. Sheet metal plate 14. You is placed on the foil 10 and has at least the length of the seam to be executed, so that the wiper with the contact piece 15 is constantly a conductive connection of the Manufactures sheet metal plate with the output terminal. The high frequency current is so on a short path of invariable length from the counter electrode 16 through the Plastic film led to the output terminals.

An Stelle einer Blechplatte 14 kann auch ein Metallgewebe verwendet werden. Dieses wird zweckmäßigerweise an seiner einen Ausgangsseite mit einer an dem Laufschienengestell isoliert angebrachten Kontaktschiene verbunden, auf welcher der Schleifer 15 läuft. Das Metallgewebe kann bei der Vorbereitung der Kunststoffbahnen leicht zusammengerollt und auf Bügeln, die an der Kontaktschiene befestigt sind, abgelegt werden. Instead of a sheet metal plate 14, a metal mesh can also be used will. This is expediently on its one output side with an connected to the running rail frame insulated attached contact rail, on which the grinder 15 is running. The metal mesh can be used in the preparation of the plastic sheets slightly rolled up and on brackets that are attached to the contact rail, be filed.

PATENTANSPRÜCIIE: 1. Vorrichtung zur dielektrischen Nahtschweißung an thermoplastischen Kunststofffolien mit mindestens einer mit der Hochfrequenz energie beschickten Elektrode, welche an einem auf Rädern oder Rollen oder Gleitschienen laufenden, den Hochfrequenzerzeuger tragenden Wagen befestigt ist und mit diesem längs der zu verschweißenden Nah.t der übereinandergelegten Folien geführt wird, und mit einer unter den Kunststoffolien liegenden leitenden Schicht, z. B. einer Metallfolie, als Gegenelektrode, dadurch gekennzeichnet, daß eine vom Hochfrequenzerzeuger zur Gegenelektrode (16) führende, für die Hochfrequenzströme durchlässige Verbindung in der Weise vorgesehen ist, daß auf die Oberseite einer Folie (10), welche über der mit der Gegenelektrode (16) verbundenen leitenden Schicht (11) liegt, ein flächenhafter Leiter, z. b. ein Blech (14) gelegt ist, mit welchem über ein die Wagenbewegungen mitmachendes Kontaktstück (15) eine leitende Verbindung zum Ausgang des Hochfrequenzerzeugers hergestellt ist. PATENT CLAIM: 1. Device for dielectric seam welding on thermoplastic plastic films with at least one with the high frequency energy-charged electrode, which is attached to a wheel or roller or slide rails running, the high frequency generator carrying carriage is attached and with this is guided along the seam to be welded of the overlapping foils, and with a conductive layer located under the plastic films, e.g. B. one Metal foil as a counter-electrode, characterized in that one of the high-frequency generator to the counter electrode (16) leading to the high-frequency currents permeable connection it is provided in such a way that on top of a film (10) which over the conductive layer (11) connected to the counterelectrode (16) lies, an areal layer Head, e.g. b. a plate (14) is placed, with which on the carriage movements Mitmachendes contact piece (15) a conductive connection to the output of the high frequency generator is made.

Claims (1)

2. Vorrichtung nach Anspruch I, dadurch gekennzeichnet, daß der flächenhafte Leiter (14) in der Bewegungsrichtung des Wagens min destens die gleiche Längsausdehnung hat wie die auszuführende Naht und daß das Kontaktstück (I5) vorzugsweise direkt auf seiner Oberfläche schleift. 2. Apparatus according to claim I, characterized in that the planar Head (14) in the direction of movement of the carriage min least the same length has like the seam to be executed and that the contact piece (I5) is preferably direct grinds on its surface. 3. Vorrichtung nach Anspruch I, dadurch gekennzeichnet, daß der flächenhafte Leiter durch ein Metallgewebe gebildet wird, welches. vorzugsweise an seiner einen Längsseite mit einer Kontaktschiene verbunden ist, auf welcher das Kontaktstück (15) läuft. 3. Apparatus according to claim I, characterized in that the planar Head is formed by a metal mesh, which. preferably on his one Long side is connected to a contact rail on which the contact piece (15) is running.
DET3419A 1950-10-19 1950-10-19 Device for dielectric seam welding on thermoplastics Expired DE872390C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DET3419A DE872390C (en) 1950-10-19 1950-10-19 Device for dielectric seam welding on thermoplastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET3419A DE872390C (en) 1950-10-19 1950-10-19 Device for dielectric seam welding on thermoplastics

Publications (1)

Publication Number Publication Date
DE872390C true DE872390C (en) 1953-03-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
DET3419A Expired DE872390C (en) 1950-10-19 1950-10-19 Device for dielectric seam welding on thermoplastics

Country Status (1)

Country Link
DE (1) DE872390C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2755638A1 (en) * 1996-11-14 1998-05-15 Mphi Sa MACHINE FOR WELDING SHEETS OR FILMS OF SYNTHETIC MATERIAL

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2755638A1 (en) * 1996-11-14 1998-05-15 Mphi Sa MACHINE FOR WELDING SHEETS OR FILMS OF SYNTHETIC MATERIAL
WO1998021022A1 (en) * 1996-11-14 1998-05-22 Mphi S.A. (Societe Anonyme A Directoire Et Conseil De Surveillance) Machine for welding synthetic sheets or films

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