DE3018124A1 - Continuous temp. regulation system for HF welding process - using remote thermometer to control automatic termination of welding cycle - Google Patents
Continuous temp. regulation system for HF welding process - using remote thermometer to control automatic termination of welding cycleInfo
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- DE3018124A1 DE3018124A1 DE3018124A DE3018124A DE3018124A1 DE 3018124 A1 DE3018124 A1 DE 3018124A1 DE 3018124 A DE3018124 A DE 3018124A DE 3018124 A DE3018124 A DE 3018124A DE 3018124 A1 DE3018124 A1 DE 3018124A1
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- electrode
- measuring
- electrode plate
- measuring electrode
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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
- B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
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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
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
- B29C66/91212—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws
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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
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
- B29C66/91216—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods enabling contactless temperature measurements, e.g. using a pyrometer
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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
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
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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
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
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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
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
- B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
-
- 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
- B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
- B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/48—Circuits
- H05B6/50—Circuits for monitoring or control
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/62—Apparatus for specific applications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electromagnetism (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
LEINWEBER & ZIMMERMANNLEINWEBER & ZIMMERMANN
Dipl.-Ing. H. Leinweber Dipl.-Ing. Heinz Zimmermann Dipl.-Ing. A. Gf. v. WengerskyDipl.-Ing. H. Leinweber Dipl.-Ing. Heinz Zimmermann Dipl.-Ing. A. Gf. v. Wengersky
2. Aufgang (Kustermann-Passage) Telefon (089) 2603989 Telex 528191 lepatd Telegr.-Adr. Leinpat München2. Entrance (Kustermann-Passage) Telephone (089) 2603989 Telex 528191 lepatd Telegr. Addr. Leinpat Munich
den 12. Mai 1980May 12, 1980
Paul Kiefel Hochfrequenz-Anlagen GmbH,
FreilassingPaul Kiefel High Frequency Systems GmbH,
Freilassing
Verfahren und Vorrichtung zum Steuern bzw. Regeln eines dielektrischen ErwärmungsVorganges·Method and device for controlling or regulating a dielectric heating process
Die Erfindung bezieht sich ■ auf ein Verfahren zum Steuern bzw. Begeln eines dielektrischen ErwärmungsVorganges, vorzugsweise eines HF-Schweißvorganges, in auf eine bestimmte Temperatur zu erwärmenden Material zwischen den mit Arbeitselektroden bestückten Elektrodenplatten einer Presse, die an einen HF-Energie liefernden HF-Generator angeschlossen ist.The invention relates to a method for Controlling or regulating a dielectric heating process, preferably an HF welding process, in material to be heated to a certain temperature between the electrode plates of a press equipped with working electrodes, which are connected to an HF generator delivering HF energy connected.
Bei einem bekannten Verfahren dieser Art wird bei fester Zeitvorgabe über einen Sollwert-IstwerWVergleich mit Hilfe einer Hegeleinrichtung ein vorgegebener Anodenstrom der Senderöhre des HF-Generators gehalten. Weiter ist es bekannt, solche Vorgaben bei entsprechender ZeitvorgabeIn a known method of this type, a setpoint / actual value comparison is made with a fixed time specification a predetermined anode current of the transmitter tube of the HF generator is maintained with the aid of a Hegel device. Next is it is known such specifications with an appropriate time limit
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auf die Hochfrequenzspannung und auch auf einen Energiewert in kVs zu beziehen oder aber die Abschaltung des Schweißvorganges nach einem vorbestimmten Arbeitswert oder Spannungswert vorzunehmen. on the high frequency voltage and also on an energy value in kVs or to switch off the welding process after a predetermined work value or voltage value.
Diese Verfahren haben den Nachteil, daß beim serienmäßigen Verschweißen von Produkten aus Materialien mit Toleranzen, also mit verschiedenen Dicken oder Materialbeiwerten, aufgrund der festen Sollwertvorgaben unterschiedliche Schweißergebnisse erzielt werden, die vom Überschweißen bis zum mangelhaften Schweißen reichen. Beim Überschweißen wird nutzlos Energie verbraucht. Mangelhafte Schweißungen führen zu Ausschuß.These methods have the disadvantage that in the series welding of products made of materials with tolerances, i.e. with different thicknesses or material coefficients, Due to the fixed setpoint specifications, different welding results can be achieved, ranging from over-welding to poor welding is enough. Over-welding consumes useless energy. Defective welds lead to Committee.
Der Erfindung liegt die Aufgabe zugrunde, das Verfahren der eingangs genannten Art so weiter auszugestalten, daß der auf das zu erwärmende Materiel bezogene richtige Energiewert in jedem Fall erreicht, aber nicht wesentlich überschritten wird. The invention is based on the object of the method of the type mentioned at the outset so that the correct energy value related to the material to be heated is achieved in any case, but not significantly exceeded.
Diese Aufgabe wird erfindungsgeiaäß im wesentlichen dadurfc gelöst, daß während des Erwärmungsvorganges die im zu erwärmenden Material jeweils erreichte Temperatur aus der Distanz kontinuierlich gemessen und zur Beeinflussung der HF-Snergiezufuhr mit dem zu erreichenden Sollwert verglichen wird. Die Lehre der Erfindung basiert somit auf der Erkenntnis, daß es möglich ist, die Steuerung der Energiezufuhr auf die Temperatur zu beziehen, die im zu erwärmenden bzw. zu verschweißenden Materiil benötigt wird.This task is essentially carried out according to the invention solved that the temperature reached in the material to be heated from the during the heating process Distance measured continuously and compared with the target value to be achieved to influence the RF energy supply will. The teaching of the invention is thus based on the knowledge that it is possible to control the energy supply refer to the temperature that is required in the material to be heated or welded.
Es ist natürlich möglich, den Temperaturanstieg zu beobachten, die Messung vorzunehmen und sum geeigneten Zeitpunkt die weitere Energiezufuhr zu drosseln bzw. zu unter-It is of course possible to observe the temperature rise, take the measurement and at the appropriate time to throttle or reduce the further energy supply
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"breohen. Ils besonders vorteilhaft hat ©s sich jedoch erwiesen, wenn das Ergebnis des Istwert-Sollvert-Vergleichs über !Regelelement e einem in den Energiezufuhrkreis eingesohalteten, einen automatischen Ablauf des Erwärmungs- bzw. SchwsiJßvorganges bewirkenden Stellglied zugeführt wird."breohen. Ils has proven particularly advantageous, however, if the result of the actual value / target value comparison is via! control element e one contained in the energy supply circuit, one automatic sequence of the heating or welding process causing actuator is supplied.
Die Erfindung richtet sich desweiteren auf eine Vorrichtung zur Durchführung des vorerwähnten Verfahrens, mit siner an einen HF-Generator angeschlossenen Presse, die das au erwärmende bzw, su verschweißende Material zwischen sich einschließende Slektrodenplatten mit irbeitselektroden umfaßt 9 die sich dadurch auszeichnet, daß außerhalb der Elektrodenplatten ein Fernthermometer (Bolometer) zur Messung der Temperatur über wenigstens einer der Elektrodenplatten zugeordnete Durohbrüclie angeordnet ist. Aufgrund der Streuwirkung entsteht nämlich auch an den Durchbrächen eine durch Wärmeübergang von den lachbarabsehnitteß her unterstützte Materialerwärmungg die vom Fernthermometer registriert wird.The invention is also directed to a device for carrying out the above-mentioned method, with a press connected to an HF generator, which comprises the au-heating or, respectively, su-welded material enclosed between them with electrode plates with working electrodes 9 which is characterized by the fact that outside the electrode plates a remote thermometer (bolometer) for measuring the temperature is arranged over at least one of the electrode plates associated with Durohbrüclie. Because of the scattering effect, material heating, supported by heat transfer from the laughable absorption, occurs at the breakthroughs and is registered by the remote thermometer.
In der Praxis sind die irbeitselektroden regelmäßig so schmal bemessen, daß sich in ihnen keine Durchbrüche anordnen lassen, ils besonders zweckuäßlg hat es sich in diesen Fällen erwiesen, wenn außer der bzw. den irbeitselektroden eine Meßelektrode mit einer Mehrzahl von Durchbrüchen vorgesehen ist, denen in der Ilektrodenplatte entsprechende Durchbrüche zugeordnet sind, und daß das außerhalb der Elektrodenplatten angeordnete Fernthermometer in auf die Durohbrüche ausgerichteter Lage festgelegt ist. Mit Hilfe dieser gesonderten Meßelektrode können zusätzlich Bereiche des zu bearbeitenden Gutes erwärmt bzw. miteinander versehweißt werden. Eine derartige Vergleicheschweißung kann dann von zusätzlichem Nutzen sein, wenn sie der Bildung von Ziernähten oder dergleichen dient, beispielsweise im Falle der Bildung von Kfz-Tür-Verkleidungen, die aus einer Lage aus Pappe mit einer PVG-SchichtIn practice, the working electrodes are regularly dimensioned so narrow that there are no openings in them it is particularly useful in these Cases proven when in addition to the working electrode (s) a measuring electrode is provided with a plurality of openings is, which in the Ilektrodenplatte corresponding breakthroughs are assigned, and that the remote thermometer arranged outside the electrode plates in on the Durohbrbruch aligned position is set. With the help of this separate measuring electrode, additional areas of the to be processed Good things are heated or welded together. Such a comparison weld can then be of additional Be useful if it is used for the formation of decorative seams or the like, for example in the case of the formation of vehicle door panels, made of a layer of cardboard with a PVG layer
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bestehen. Dabei findet zweckmäßigerweise eine zylinderförmige Meßelektrode -Anwendung, bei der die üurchbrüche durch axial yerleufende Bohrungen gebildet sind.exist. A cylindrical shape is expediently found here Measuring electrode application in which the breakthroughs through axially yerleufende bores are formed.
Hb sehr vorteilhaft hat es sieh herausgestellt, wenn die Meßelektrode an der mit Masse verbundenen Elektrodenplatte festgelegt ist. Da die Durchbrüche gleichseitig ale elektrische Filter wirken, kann bei masseseitiger Anordnung der Meßelektrode keine wesentliche HF-Inergie nach außen gelangen. Hb has been found to be very beneficial see if the measuring electrode is fixed to the electrode plate connected to ground. Since the breakthroughs ale on the same side electrical filters can work if they are arranged on the ground side the measuring electrode does not get any significant RF inergy to the outside.
Um eine Überwärmung der Meßelektrode bei ihrem Einsatz ohne größere Unterbrechungen zu vermeiden, hat es sich als günstig erwiesen, wenn der Meßelektrode eine Kühleinrichtung augeordnet ist. Diese ist zweckmäßigerweise duroh einen an einem Kühlmittelkreis anschließbaren, die Meßelektrode durchsetsenden Kühlkanal gebildet.In order to avoid overheating of the measuring electrode when it is used without major interruptions, it has been found to be Proven to be beneficial if the measuring electrode is provided with a cooling device. This is expediently duroh one a coolant circuit connectable, formed through the measuring electrode penetrating cooling channel.
Yortäliiafierweise ist der Meßelektrode an der einen Slektrodenpiatte eine an äer anderen Elektrodenplatte festgelegte Gegenelektrode zugeordnet»Yortäliiafierweise the measuring electrode associated with a set of OCE other electrode plate counter electrode on one Slektrodenpiatte "
Weitere zweckmäßige Einiselheitenj Vorteile und Merkaale der Erfindung ergeben sich aus der folgenden Beschreibung und der Zeichnung, auf die bezüglich aller nicht im Text beschriebenen Einzelheiten ausdrücklich verwiesen wird. Is aeigt:Further useful singularities, advantages and features of the invention will become apparent from the following description and the drawing, on which all not in the The details described in the text are expressly referred to. Is aeigt:
Fig. 1 eine sehematieone Seitenansicht eines HF-Generators mit angeschlossener Presse,1 is a schematic side view of an HF generator with connected press,
Fig. 2 eine echeaatisohe Ansieht eines Details der Presse naeh Fig. 1?Figure 2 is an identical view of a detail of the press near Fig. 1?
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130047/01St130047/01St
T ·T
Fig. 3 einen Ausschnitt aus Fig. 2, in vergrößertem Maßstab,3 shows a detail from FIG. 2, on an enlarged scale,
Fig. 4 eine Draufsicht auf eine bei der Presse zum Einsatz gelangende Meßelektrode,4 shows a plan view of a measuring electrode used in the press,
Fig. 5 eine Schnittansicht der Meßelektrode nach Fig* 4? FIG. 5 is a sectional view of the measuring electrode according to FIG. 4 ?
Fig. 6 und 7 eine Draufsicht bzw« eine Schnittansicht einer mit einem zusätzlichen Kühlkanal versehenen Meßelektrode,6 and 7 show a plan view or a sectional view of a cooling channel provided with an additional cooling channel Measuring electrode,
Fig. 8 eine schematisehe Ansicht analog derjenigen nach Fig. 2 zur Veranschaulichung einer abgewandelten Ausführungsform, unä8 shows a schematic view analogous to that according to Fig. 2 to illustrate a modified embodiment, and the like
Fig. 9 eine schematische Ansicht zur Veranschaulichung einer weiteren Ausführungsfsrm.9 is a schematic view to illustrate a further embodiment.
Wie aus Fig« 1 ersichtlich, ist die veranschaulichte Presse 1 an einen HF-Energie liefernden HF-Generator 2 an= geschlossen» Die Presse 1 umfaßt eine untere Elektrodenplatte 3s die mit dem Pressengestell 5 fest verbunden und zusätzlich über eine Massezuleitung 6 an den HF-Generator 2 angeschlossen ist«, Im veranschaulichten Beispiel weist die Presse 1 eine obere, an HF liegende9 abgeschirmte sogenannte "heiße" Elektrodenpiatte 7 an Isolatoren 4 auf„ Diese Elektrodenplatte 7 wird vom Pressenarm 8 getragen, in Bezug auf den sie auf nicht näher veranschaulichte Weise in Richtung der "kalten" Elektrodenplatte 3 vertikal absenkbar gelagert ist. An der Oberseite der Elektrodenplatte 3 befindet.sich das dielektrisch zu erwärmende Gut in Form zweierAs can be seen from FIG. 1, the illustrated press 1 is connected to an HF generator 2 delivering HF energy. The press 1 comprises a lower electrode plate 3s which is firmly connected to the press frame 5 and additionally via a ground lead 6 to the HF -Generator 2 is connected ", In the illustrated example, the press 1 has an upper, so-called" hot "electrode plate 7, which is shielded from HF 9, on insulators 4 illustrated way is mounted vertically lowerable in the direction of the "cold" electrode plate 3. At the top of the electrode plate 3 is the dielectrically to be heated good in the form of two
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130047/G1S1130047 / G1S1
• ο-• ο-
miteinander zu verschweißender Materiallagen 9 und 10, beispielsweise einerseits aus Pappe und andererseits aus PVC. Auf der rechten Seite der unteren Elektrodenplatte 3 ist schematisch eine Meßelektrode 11 veranschaulicht, der eine an der Unterseite der oberen Elektrodenplatte 7 festgelegte Gegenelektrode 12 zugeordnet ist. Diese Gegenelektrode 12 ist Teil einer Arbeitselektrode 13 mit mehr oder weiiger schmalen stegartigen VorSprüngen 14. Die Meßelektrode weist eine Vielzahl von in Fig. 1 nur schematisch angedeuteten, in den übrigen Figuren klar veranschaulichten Durchbrüchen 15 in Form axialer Bohrungen auf. Diesen Bohrungen sind in der zugehörigen Elektrodenplatte 3 sowie in etwaigen, nicht gezeigten Abschirmblechen oder dergleichen entsprechende Durchbrüche 16 zugeordnet, durch die hindurch mit Hilfe eines auf die Durchbrüche ausgerichteten Fernthermometers (Bolometers) 17 die sich in den zu erwärmenden Materiallagen 9, 10 einstellende Temperatur gemessen werden kann. Das Thermometer 17 ist mit einem Schaltinstrument (Grenzwertgeber) 18 verbunden, das bei einer bestimmten vorgegebenen Temperatur Schaltvorgänge auslöst, über die die Zufuhr der Ht-Energie auf die Elektroden abgeschaltet, vermindert oder erhöht werden kann.Material layers 9 and 10 to be welded together, for example made of cardboard on the one hand and PVC on the other. On the right side of the lower electrode plate 3 is schematically illustrates a measuring electrode 11, which is fixed on the underside of the upper electrode plate 7 Counter electrode 12 is assigned. This counter electrode 12 is part of a working electrode 13 with more or white narrow web-like projections 14. The measuring electrode has a multiplicity of breakthroughs which are only indicated schematically in FIG. 1 and clearly illustrated in the other figures 15 in the form of axial bores. These holes are in the associated electrode plate 3 and in any, Not shown shielding plates or the like associated with corresponding openings 16 through which with the help of a remote thermometer (bolometer) 17 aligned with the openings, the layers of material to be heated 9, 10 adjusting temperature can be measured. The thermometer 17 is with a switching instrument (Limit value transmitter) 18 connected, which triggers switching operations at a certain predetermined temperature, via the the supply of Ht energy to the electrodes can be switched off, decreased or increased.
Wie aus den Fig. 4 bis 7 ersichtlich, ist die Meßelektrode 11 zylindrisch ausgebildet und weist die die üurchbrüche 15 bildenden axial verlaufenden Bohrungen auf. Auf ihrer der sie tragenden Elektrodenplatte 3 bzw. 7 zugewandten Seite ist die Meßelektrode 11 mit ihrer Befestigung dienenden flanschartigen Ansätzen 19 versehen. Bei der Ausführung nach Fig. 6 und 7 ist in dem Ansatz 19 ferner eine Kühleinrichtung in Form eines die Meßelektrode 11 durchsetzen-As can be seen from FIGS. 4 to 7, the measuring electrode 11 is cylindrical and has the üurchbrichen 15 forming axially extending bores. On their electrode plate 3 or 7 facing them On the side, the measuring electrode 11 is provided with flange-like projections 19 serving to fasten it. When executing According to FIGS. 6 and 7, a cooling device in the form of a measuring electrode 11 is also in the extension 19.
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130047/0161130047/0161
den Kühlkanals 20 vorgesehen, über den ein gasförmiges oder flüssiges Kühlmedium geleitet werden kann.the cooling channel 20 is provided, through which a gaseous or liquid cooling medium can be passed.
Bei der Ausführungsform nach Fig. 1 ist die Meßelektrode 11 an der unteren Elektrodenplatte 3 und die Gegenelektrode 12 an der oberen Elektrodenplatte 7 als Einheit der mit den stegartigen VorSprüngen 14 ausgestatteten Arbeitselektrode 13 ausgebildet. Demgegenüber ist bei der Ausführung nach Fig. 2 die Meßelektrode 11 an der oberen Elektrodenplatte 7 festgelegt, und zwar unabhängig von der Arbeitselektrode 13 mit den stegartigen Vorsprängen 14. Die einen Ausschnitt aus Fig. 2 veranschaulichende Fig. 3 zeigt die zur Erwärmung in den Materiallagen 10, 11 führende Streuwirkung an den Durchbrüchen 15.In the embodiment according to FIG. 1, the measuring electrode 11 is on the lower electrode plate 3 and the counter electrode 12 on the upper electrode plate 7 as a unit of the working electrode equipped with the web-like projections 14 13 formed. In contrast, in the embodiment according to FIG. 2, the measuring electrode 11 is fixed on the upper electrode plate 7, regardless of the working electrode 13 with the web-like projections 14. The one cutout 3, which illustrates FIG. 2, shows the scattering effect leading to the heating in the material layers 10, 11 at the breakthroughs 15.
Fig. 8 veranschaulicht eine Ausführung, bei der die Meßelektrode 11 an der mit der HF-Energie gespeisten, "heißen" oberen Elektrodenplatte 7 verbunden ist, und zwar ist in diesem Falle der flanschartige Ansatz 19 als Baueinheit mit der die stegartigen Vorsprünge 14 tragenden Arbeitselektrode 13 ausgestattet. Durchbrüche 15 und 16 ermöglichen auch hier die Temperaturmessung mit Hilfe des Fernthermometers 17.Fig. 8 illustrates an embodiment in which the measuring electrode 11 is fed with the RF energy, "hot" upper electrode plate 7 is connected, and in this case the flange-like extension 19 is included as a structural unit of the working electrode 13 carrying the web-like projections 14. Breakthroughs 15 and 16 also allow here the temperature measurement with the help of the remote thermometer 17.
Bei der Ausführung nach Fig. 9 ist die Meßelektrode 11 integrierter Bestandteil der unteren Elektrodenplatte 3.In the embodiment according to FIG. 9, the measuring electrode 11 is an integral part of the lower electrode plate 3.
-8--8th-
130047/0151130047/0151
BezugszeichenaufstellungList of reference symbols
130047/0151130047/0151
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Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3018124A DE3018124A1 (en) | 1980-05-12 | 1980-05-12 | Continuous temp. regulation system for HF welding process - using remote thermometer to control automatic termination of welding cycle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3018124A DE3018124A1 (en) | 1980-05-12 | 1980-05-12 | Continuous temp. regulation system for HF welding process - using remote thermometer to control automatic termination of welding cycle |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3018124A1 true DE3018124A1 (en) | 1981-11-19 |
Family
ID=6102197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3018124A Withdrawn DE3018124A1 (en) | 1980-05-12 | 1980-05-12 | Continuous temp. regulation system for HF welding process - using remote thermometer to control automatic termination of welding cycle |
Country Status (1)
Country | Link |
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DE (1) | DE3018124A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2522581A1 (en) * | 1982-03-05 | 1983-09-09 | Cincinnati Milacron Inc | APPARATUS FOR HEATING BY DIELECTRIC LOSS OF PREFORMS OF THERMOPLASTIC ARTICLES |
-
1980
- 1980-05-12 DE DE3018124A patent/DE3018124A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2522581A1 (en) * | 1982-03-05 | 1983-09-09 | Cincinnati Milacron Inc | APPARATUS FOR HEATING BY DIELECTRIC LOSS OF PREFORMS OF THERMOPLASTIC ARTICLES |
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