DE4102677A1 - Current step supply for heating conductor for sticking long parts - has measurement and control circuits controlling current according to heating conductor resistance - Google Patents

Current step supply for heating conductor for sticking long parts - has measurement and control circuits controlling current according to heating conductor resistance

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Publication number
DE4102677A1
DE4102677A1 DE19914102677 DE4102677A DE4102677A1 DE 4102677 A1 DE4102677 A1 DE 4102677A1 DE 19914102677 DE19914102677 DE 19914102677 DE 4102677 A DE4102677 A DE 4102677A DE 4102677 A1 DE4102677 A1 DE 4102677A1
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DE
Germany
Prior art keywords
impulse
power supply
circuit
heating conductor
supply according
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.)
Withdrawn
Application number
DE19914102677
Other languages
German (de)
Inventor
Bruno Gruber
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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 DE19914102677 priority Critical patent/DE4102677A1/en
Publication of DE4102677A1 publication Critical patent/DE4102677A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • 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
    • B29C66/91214—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 by measuring the electrical resistance of a resistive element belonging to one of the parts to be welded, said element acting, e.g. as a thermistor
    • 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
    • B29C66/9131—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 heat or the thermal flux, i.e. the heat flux
    • B29C66/91311—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 heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating
    • B29C66/91317—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 heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating by measuring the electrical resistance
    • 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
    • B29C66/91651—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 by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91655—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 by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the current intensity
    • 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • G05D23/2401—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor using a heating element as a sensing element
    • 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
    • B29C66/91651—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 by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91653—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 by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the voltage, i.e. the electric potential difference or electric tension
    • 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
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Resistance Heating (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

A current step supply for a molten adhesive coated heating conductor contains a mains transformer and an on/off switch forming a circuit for the flow of current through the heating conductor. In addition to the current step circuit (15) there is a measurement circuit (20) which detects the resistance value of the heating conductor (2) connected to the supply (1). A control stage (9) between the measurement and current step circuits controls the current in the current circuit according to the heating conductor resistance. USE/ADVANTAGE - For use in sticking long parts. Current supply is partic. suitable for processing coated heating conductor.

Description

Die Erfindung betrifft ein Stromstoßnetzteil gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a surge power supply according to the Preamble of claim 1.

Aus der DE-OS 41 01 246 ist ein Heizleiter bekannt, der mit einem Schmelzkleber beschichtet ist. Ebenso ist aus der DE- OS 41 01 215 ein Verfahren zum Verkleben von langen Teilen be­ kannt, das einen derart beschichteten Heizleiter verwendet. Zum Verkleben der Teile wird der beschichtete Heizleiter über ein Netzteil mit Strom für eine bestimmte Zeitdauer versorgt. Zwar läßt sich der notwendige Stromstoß nach Zeitdauer und Höhe auch mit bekannten Netzteilen durchfüh­ ren, doch erweisen sich die bekannten Netzteile als weniger geeignet, da sie für Dauerbetrieb ausgelegt sind. From DE-OS 41 01 246 a heating conductor is known, which with is coated with a hot melt adhesive. Likewise, from the DE OS 41 01 215 a method for gluing long parts be knows that uses such a coated heating conductor. The coated heating conductor is used to glue the parts together via a power supply unit with electricity for a certain period of time provided. The necessary current surge can be reduced Carry out time and amount with known power supplies ren, but the known power supplies turn out to be less suitable because they are designed for continuous operation.  

Es ist daher Aufgabe der Erfindung, ein Stromstoßnetzteil für einen schmelzkleberbeschichteten Heizleiter zu schaf­ fen, das besonders zum Verarbeiten eines beschichteten Heizleiters geeignet ist.It is therefore an object of the invention to provide a surge power supply for a hot melt adhesive coated heating conductor fen, especially for processing a coated Heating conductor is suitable.

Die Aufgabe der Erfindung wird durch die Merkmale des kenn­ zeichnenden Teils des Patentanspruchs 1 gelöst.The object of the invention is characterized by the features of Drawing part of claim 1 solved.

Erfindungsgemäß wird zusätzlich neben dem Stromstoßkreis eines Netzteiles ein Meßkreis vorgesehen, der den Wider­ standswert eines Heizleiters detektiert, der an das Netz­ teil angeschlossen ist. Das Netzteil nach der Erfindung bildet somit gleichzeitig ein Widerstandsmeßgerät, das den Widerstandswert des angeschlossenen Heizleiters detektiert, der je nach Länge von dem Heizleiter unterschiedlich aus­ fallen kann. Die Stromversorgung des Widerstandsmeßgerätes kann hierbei in vorteilhafter Weise durch das Netzteil selbst erfolgen.According to the invention, in addition to the impulse circuit a power supply a measuring circuit is provided, the opp level value of a heating conductor that is connected to the network part is connected. The power supply according to the invention thus simultaneously forms a resistance measuring device that Resistance value of the connected heating conductor detected, which differs depending on the length of the heating conductor can fall. The power supply of the resistance measuring device can be advantageously by the power supply yourself.

Der besondere Vorteil des erfindungsgemäßen Stromstoßnetz­ teiles besteht darin, daß vor Abgabe des Stromstoßes einer Bedienperson signalisiert wird, ob der Heizleiter tatsäch­ lich kontaktiert ist, keine Unterbrechungen aufweist und somit der Stromfluß während des Stromstoßes erfolgen kann. Erfindungsgemäß ist von dem einen auf den anderen Strom­ kreis umschaltbar und/oder es besteht zwischen beiden Stromkreisen eine Regelschaltung, die den Stromstoß in Ab­ hängigkeit von dem Widerstandswert regelt. Ist eine Regel­ schaltung vorgesehen, arbeitet das Stromstoßnetzteil inso­ weit selbsttätig, daß der notwendige Stromfluß ohne weitere Einstellungen der Bedienperson eingeregelt wird.The particular advantage of the impulse network according to the invention part is that before delivering a surge Operator is signaled whether the heating conductor is actually Lich contacted, has no interruptions and thus the current flow can take place during the surge. According to the invention, there is a flow from one to the other circle switchable and / or there is between the two Circuits a control circuit that the surge in Ab depends on the resistance value. It's a rule provided circuit, the impulse power supply works inso far automatically that the necessary current flow without further Operator settings are adjusted.

Nachfolgend wird die Erfindung anhand der Zeichnung näher beschrieben. Es zeigen:The invention will be described in more detail below with the aid of the drawing described. Show it:

Fig. 1 eine erste Ausführungsform der Erfindung, Fig. 1 shows a first embodiment of the invention,

Fig. 2 eine zweite Ausführungsform der Erfindung, und Fig. 2 shows a second embodiment of the invention, and

Fig. 3 eine dritte Ausführungsform der Erfindung. Fig. 3 shows a third embodiment of the invention.

Fig. 1 zeigt eine erste Ausführungsform eines erfindungsge­ mäßen Stromstoßnetzteiles 1. Das Netzteil 1 weist zwei Ein­ gangsklemmen 5 und zwei Ausgangsklemmen 4 auf. An den Ein­ gangsklemmen 5 werden beispielsweise 220 V Wechselspannung zugeführt. An den Ausgangsklemmen 4 wird ein Heizleiter 2 angeschlossen, der mit einem Schmelzkleber beschichtet ist und durch einen Stromstoß erwärmt werden soll. Der Heizlei­ ter 2 weist unterschiedliche Längen auf, was von der Größe der zu verklebenden Teile abhängt. Damit ändert sich der Widerstand des Heizleiters 2. Fig. 1 shows a first embodiment of a erfindungsge MAESSEN rush current power supply 1. The power supply unit 1 has two input terminals 5 and two output terminals 4 . At the input terminals 5 , for example, 220 V AC voltage are supplied. A heating conductor 2 is connected to the output terminals 4 , which is coated with a hot-melt adhesive and is to be heated by a surge of current. The Heizlei ter 2 has different lengths, which depends on the size of the parts to be glued. This changes the resistance of the heating conductor 2 .

Erfindungsgemäß weist das Netzteil 1 einen Stromstoßkreis 15 und einen Meßkreis 20 auf, über den der Widerstandswert des Heizleiters detektiert wird. Zum Stromstoßkreis gehört ein Transformator 3, der gleichzeitig als Trenntransforma­ tor die Sicherheit erhöht, eine Regelstufe 9, ein Ein/Aus- Schalter 7, der untere Kontakt eines Umschalters 6 und der Heizleiter 2 selbst, der wiederum mit seinem einen Ende an dem Transformator 3 sekundärseitig angeschlossen ist. Von dem Stromstoßkreis 15 wird auf den Meßkreis 20 mittels des Umschalters 6 umgeschaltet. Demnach gehören zum Meßkreis nach der in Fig. 1 gezeigten Ausführungsform ein Meßinstru­ ment 12 mit einem Vorwiderstand 11. Ebenso gehören zu dem Meßkreis eine Signalleuchte 13, die in Reihe zu einem Shunt 10 liegt. Nach Fig. 1 sind somit sogar zwei Meßkreise vor­ gesehen, die parallel geschaltet sind. Hierbei umfaßt der eine Meßkreis die Signalleuchte 13 und der andere das Meß­ instrument 12.According to the invention, the power supply unit 1 has a surge circuit 15 and a measuring circuit 20 , via which the resistance value of the heating conductor is detected. The impulse circuit includes a transformer 3 , which also increases safety as an isolating transformer, a control stage 9 , an on / off switch 7 , the lower contact of a changeover switch 6 and the heating conductor 2 itself, which in turn has one end on the transformer 3 is connected on the secondary side. From the impulse circuit 15 is switched to the measuring circuit 20 by means of the switch 6 . Accordingly, the measuring circuit according to the embodiment shown in FIG. 1 includes a measuring instrument 12 with a series resistor 11 . The measuring circuit also includes a signal lamp 13 , which is in series with a shunt 10 . According to FIG. 1 thus even two measurement circuits before are seen, which are connected in parallel. Here, one measuring circuit comprises the signal lamp 13 and the other the measuring instrument 12 .

In Fig. 1 ist der Umschalter 6 auf den Meßkreis 20 umge­ schaltet dargestellt, wobei zum gesamten Meßkreis wiederum der Transformator 3 und der Heizleiter 2 gehören, die den Meßkreis vollständig schließen. Soll ein Heizleiter 2 mit einem Stromstoß versorgt werden, wird vorab dessen Wider­ standswert ermittelt. Hierzu fließt ein Strom von dem Transformator 3 durch das Meßinstrument 12, den Vorwider­ stand 11, über den Umschalter 6, den Heizleiter 2 und zu­ rück zum Transformator 3. Die Meßkreise können auch mit Gleichspannung versorgt werden und das Meßinstrument 12 als Ohmmeter geeicht sein. Jedoch kann das Meßinstrument 12 auch so geeicht sein, daß es anzeigt, welche Spannung im Stromstoßkreis einzustellen ist, daß der notwendige Strom­ stoß durch den Heizleiter 2 fließt. Hierzu kann beispiels­ weise der Trafo 3 als Regeltrafo ausgebildet sein. Parallel zu dem Meßwerk 12 ist ein weiterer Meßkreis mit der Signal­ leuchte 13 geschaltet, die aufleuchtet, wenn sichergestellt ist, daß der Heizleiter richtig kontaktiert ist. Dadurch, daß der Heizleiter 2 mit Schmelzkleber beschichtet ist, läßt sich anhand der Signalleuchte 13 erkennen, ob die Kon­ taktklemmen die isolierende Schmelzkleberschicht auf dem Heizleiter 2 durchdringen und so der Stromkreis für den Stromstoß geschlossen ist. Ebenso wird angezeigt, ob der Heizleiter Unterbrechungen aufweist. In anderen Ausfüh­ rungsformen als in Fig. 1 gezeigt, kann die Signalleuchte 13 ohne das genauere Meßinstrument 12 vorgesehen sein.In Fig. 1, the changeover switch 6 to the measuring circuit 20 is shown switched, with the entire measuring circuit in turn including the transformer 3 and the heating conductor 2 , which completely close the measuring circuit. If a heating conductor 2 is to be supplied with a surge, its resistance value is determined in advance. For this purpose, a current flows from the transformer 3 through the measuring instrument 12 , the series resistor 11 , via the changeover switch 6 , the heating conductor 2 and back to the transformer 3 . The measuring circuits can also be supplied with DC voltage and the measuring instrument 12 can be calibrated as an ohmmeter. However, the measuring instrument 12 can also be calibrated in such a way that it indicates which voltage is to be set in the impulse circuit, that the necessary current surges through the heating conductor 2 . For this purpose, the transformer 3 can be designed as a control transformer, for example. In parallel to the measuring mechanism 12 , another measuring circuit with the signal light 13 is connected, which lights up when it is ensured that the heating conductor is correctly contacted. Characterized in that the heating conductor 2 is coated with hot melt adhesive, it can be seen from the signal lamp 13 whether the contact terminals con penetrate the insulating hot melt adhesive layer on the heating conductor 2 and so the circuit is closed for the current surge. It also shows whether the heating conductor has interruptions. In other embodiments as shown in FIG. 1, the signal lamp 13 can be provided without the more precise measuring instrument 12 .

In einer einfachen Ausführungsform weist das erfindungsge­ mäße Netzteil 1 eine Stromversorgungsleitung 15 auf, die von dem Transformator 3 zu dem Ein/Aus-Schalter 7 führt. Zum Ausführen eines Stromstoßes wird der Umschalter 6 auf den Stromstoßkreis umgeschaltet. Die Dauer des Stromstoßes wird hierbei durch Betätigen des Schalters 7 bestimmt. In einer erweiterten Ausführungsform liegt eine Regelschaltung 9 in der Stromversorgungsleitung 15. Die Regelschaltung 9 greift den Spannungsabfall an einem Shunt 10 ab, der auch in Reihe zu dem Meßwerk 12 liegen kann. Der während der Meßdauer am Shunt 10 detektierte Spannungsabfall wird in der Regelstufe 9 zwischengespeichert und daraus der notwen­ dige Leistungsbedarf errechnet, der dem Heizleiter 2 zuge­ führt werden soll. Nach dem Umschalten des Umschalters 6 auf den Stromstoßkreis, wobei der Schalter 7 zuvor ge­ schlossen wurde, wird eine Triggertaste 8 betätigt, die den notwendigen Stromstoß auslöst, der von der Regelstufe 9 ausgeführt werden soll. In anderen Ausführungsformen kann die Regelstufe 9 auch mit dem Umschalter 6 gekoppelt sein, so daß bei Betätigen der Triggertaste das Umschalten von dem Meßkreis auf den Stromstoßkreis automatisch erfoigt.In a simple embodiment, the power supply 1 according to the invention has a power supply line 15 which leads from the transformer 3 to the on / off switch 7 . To carry out a surge, the changeover switch 6 is switched to the surge circuit. The duration of the current surge is determined by operating switch 7 . In an expanded embodiment, a control circuit 9 is located in the power supply line 15 . The control circuit 9 reaches the voltage drop at a shunt from 10, which can also be in series with the measuring mechanism 12th The voltage drop detected during the measurement period at the shunt 10 is temporarily stored in the control stage 9 and from this the necessary power requirement is calculated, which is to be supplied to the heat conductor 2 . After switching the switch 6 to the impulse circuit, the switch 7 having been previously closed, a trigger button 8 is actuated, which triggers the necessary surge, which is to be carried out by the control stage 9 . In other embodiments, the control stage 9 can also be coupled to the changeover switch 6 , so that when the trigger key is actuated, the changeover from the measuring circuit to the impulse circuit is carried out automatically.

Erfindungsgemäß sind die Ausführungsformen der Netzteile als Konstantstromquellen geschaltet, die einen eingeprägten Strom durch den Heizleiter 2 bewirken. Das erfindungsgemäße Stromstoßnetzteil arbeitet im Niederspannungsbereich, der bei industriellen Anwendungen des Schmelzklebeverfahrens bis zu 220 V reichen kann. Für die Heimwerkeranwendung sind aus Sicherheitsgründen niedrigere Spannungen vorgesehen, die an den Klemmen 4 auftreten. Bevorzugt werden in diesem Fall bis zu 50 V bei bis zu 10 A abgegeben.According to the invention, the embodiments of the power supplies are connected as constant current sources, which cause an impressed current through the heating conductor 2 . The impulse power supply according to the invention works in the low-voltage range, which can range up to 220 V in industrial applications of the hot-melt adhesive process. For safety reasons, lower voltages that occur at terminals 4 are provided for home improvement applications. In this case, up to 50 V are preferably emitted at up to 10 A.

In Fig. 2 ist eine weitere Ausführungsform der Erfindung dargestellt, bei der abweichend von Fig. 1 der Shunt 10 im Stromstoßkreis liegt und in einer Regelstufe 22 angeordnet ist. Die Regelstufe 22 weist wiederum die Signalleuchte 13 auf, die die sichere Kontaktierung des Heizleiters 2 an den Klemmen 4 signalisiert. Zusätzlich ist eine Betriebszu­ standsleuchte 17 vorgesehen, die das Ende des Stromstoßes anzeigt. Weiter ist an der Regelstufe 22 ein manuell betä­ tigbarer Regler 21 angeschlossen, um eine Führungsgröße für den Stromstoß nach Zeitdauer und/oder Stromhöhe einzustel­ len. Die Triggertaste 8 aus Fig. 1 ist gleichfalls vorseh­ bar und an der Regelstufe 22 anschließbar, die gleichzeitig den Meßvorgang und den anschließenden Stromstoß auslösen kann. FIG. 2 shows a further embodiment of the invention, in which, in contrast to FIG. 1, the shunt 10 is located in the impulse circuit and is arranged in a control stage 22 . The control stage 22 in turn has the signal lamp 13 , which signals the safe contacting of the heating conductor 2 at the terminals 4 . In addition, a Betriebszu status light 17 is provided, which indicates the end of the surge. Furthermore, a manually operable controller 21 is connected to the control stage 22 in order to set a reference variable for the current surge according to the duration and / or current level. The trigger button 8 of Fig. 1 is also provided bar and connectable to the control stage 22 , which can trigger the measurement process and the subsequent surge.

Weiter ist die Regelstufe 22 mit einer Stromversorgungslei­ tung 20 direkt an dem Netztransformator 3 angeschlossen. Dies dient dazu, daß die Stromversorgung der Regelstufe 22 unabhängig von dem Stromstoßkreis erfolgt. Der Stromstoß­ kreis weist wiederum die Leitung 15, einen gesteuerten Schalter 16 und eine Verbindungsleitung 18 auf, die an die Regelstufe 22 angeschlossen ist. Von der Regelstufe 22 geht eine Rückkopplungsleitung 19 zu dem stromgesteuerten Schal­ ter 16. Wird beispielsweise durch die Triggertaste 8 (nicht dargestellt) der Arbeitsvorgang ausgelöst, mißt die Regel­ stufe 22 zuerst den Widerstandswert des Heizleiters 2. An­ schließend wird dieser auf dem Widerstandswert errechnete und zwischengespeicherte Leistungsbedarf dazu benutzt, über die Rückkopplungsleitung 19 den gesteuerten Schalter 16 für die notwendige Zeitdauer zu schließen. Jedoch kann die Re­ gelstufe 22 auch so ausgelegt sein, daß Meßvorgang und Stromstoß gleichzeitig ausgeführt werden. Hierzu wird an dem Shunt 10 (nicht dargestellt) in der Regelstufe 22 der Spannungsabfall detektiert und daraus während des Strom­ stoßes die Höhe bzw. Dauer des Stromflusses ermittelt. In diesem Fall wird nach Betätigen der Triggertaste der strom­ gesteuerte Schalter 16 sofort geschlossen. Die Signal­ leuchte 17 zeigt wiederum das Ende des Stromstoßvorganges an.Next, the control stage 22 with a Stromversorgungslei device 20 is connected directly to the power transformer 3 . This serves to ensure that the control stage 22 is supplied with power independently of the impulse circuit. The impulse circuit in turn has the line 15 , a controlled switch 16 and a connecting line 18 which is connected to the control stage 22 . From the control stage 22 , a feedback line 19 goes to the current-controlled switch ter 16 . If, for example, the work process is triggered by the trigger button 8 (not shown), the control stage 22 first measures the resistance value of the heating conductor 2 . At closing this calculated on the resistance value and temporarily stored power requirement is used to close the controlled switch 16 for the necessary period of time via the feedback line 19 . However, the re gel stage 22 can also be designed so that the measuring process and surge are carried out simultaneously. For this purpose, the voltage drop is detected on the shunt 10 (not shown) in the control stage 22 and the amount or duration of the current flow is determined therefrom during the current surge. In this case, the current-controlled switch 16 is closed immediately after actuation of the trigger button. The signal light 17 in turn indicates the end of the surge operation.

Fig. 3 zeigt eine weitere Ausführungsform der Erfindung, die sich von den zuvor beschriebenen Ausführungsformen da­ von unterscheidet, daß kein Shunt 10 vorhanden ist. Als Shunt wird der an den Klemmen 4 angeschlossene Heizleiter selbst verwendet. Hierzu sind über Verbindungsleitungen 23, 24 die Klemmen 4 mit einer Regelschaltung 25 verbunden. Die Stromversorgung der Regelschaltung 25 erfolgt wiederum über eine Leitung 20, die vor dem stromgesteuerten Schalter 16 angeschlossen ist. Wird die Triggertaste 8 betätigt, die an der Regelstufe 25 angeschlossen ist, wird wiederum, wie zu­ vor beschrieben, zuvor ein Meßvorgang und anschließend der Stromstoßvorgang oder Stromstoßvorgang und Meßvorgang gleichzeitig ausgeführt. Hierzu ist die Regelstufe 25 wie­ derum über eine Leitung 19 mit dem gesteuerten Schalter 16 verbunden. An dem handbetätigbaren Regler 21 sind wiederum Grundgrößen einstellbar. FIG. 3 shows a further embodiment of the invention, which differs from the previously described embodiments in that no shunt 10 is present. The heating conductor connected to terminals 4 is used as the shunt. For this purpose, the terminals 4 are connected to a control circuit 25 via connecting lines 23 , 24 . The control circuit 25 is in turn supplied with power via a line 20 which is connected upstream of the current-controlled switch 16 . If the trigger button 8 , which is connected to the control stage 25 , is actuated, a measurement process is again carried out, as described above, and then the surge operation or surge operation and measurement process is carried out simultaneously. For this purpose, the control stage 25 is in turn connected to the controlled switch 16 via a line 19 . Basic variables can again be set on the manually operable controller 21 .

Erfindungsgemäß weist das Netzteil 1 Spannklemmbacken auf, die über Kabel (nicht dargestellt) an den Klemmen 4 ange­ schlossen sind. Zwischen den Spannklemmbacken werden die Enden des Heizleiters 2 unter Kontaktgabe eingeklemmt und festgespannt. Bevorzugt weisen die Klemmbacken Riffelungen auf, die die Kleberbeschichtung des Heizleiters 2 durch­ dringen und eine sichere Kontaktierung gewährleisten.According to the invention, the power supply unit 1 has clamping jaws which are connected to the terminals 4 via cables (not shown). Between the clamping jaws, the ends of the heating conductor 2 are clamped in contact and clamped. The clamping jaws preferably have corrugations which penetrate the adhesive coating of the heating conductor 2 and ensure reliable contacting.

Claims (15)

1. Stromstoßnetzteil für einen schmelzkleberbeschichteten Heizleiter, das einen Netztransformator und einen Ein/Aus- Schalter aufweist, die einen Stromstoßkreis für den Strom­ fluß durch den Heizleiter bilden, dadurch gekennzeichnet, daß zusätzlich zu dem Stromstoßkreis (15) ein Meßkreis (20, 23, 24) vorgesehen ist, der den Widerstandswert des Heizleiters (2) detektiert, der an das Netzteil (1) ange­ schlossen ist.1. impulse power supply for a hot melt adhesive-coated heating conductor, which has a power transformer and an on / off switch, which form a surge circuit for the current flow through the heating conductor, characterized in that in addition to the impulse circuit ( 15 ) a measuring circuit ( 20 , 23 , 24 ) is provided, which detects the resistance value of the heating conductor ( 2 ), which is connected to the power supply ( 1 ). 2. Stromstoßnetzteil nach Anspruch 1, dadurch gekennzeich­ net, daß ein Umschalter (6) zwischen dem Meßkreis (20, 23, 24) und dem Stromstoßkreis (15) vorgesehen ist. 2. impulse power supply according to claim 1, characterized in that a switch ( 6 ) between the measuring circuit ( 20 , 23 , 24 ) and the impulse circuit ( 15 ) is provided. 3. Stromstoßnetzteil nach Anspruch 1-2, dadurch gekenn­ zeichnet, daß eine Regelstufe (9, 22, 25) zwischen Meß- und Stromstoßkreis vorgesehen ist, die den Stromfluß durch den Stromstoßkreis (15) in Abhängigkeit von dem Widerstandswert des Heizleiters (1) regelt.3. impulse power supply according to claim 1-2, characterized in that a control stage ( 9 , 22 , 25 ) is provided between the measuring and impulse circuit, the current flow through the impulse circuit ( 15 ) depending on the resistance value of the heating conductor ( 1 ) regulates. 4. Stromstoßnetzteil nach Anspruch 3, dadurch gekennzeich­ net, daß ein Shunt (10) im Stromstoßkreis (15) oder Meß­ kreis (20, 23, 24) vorgesehen ist, der die Regelstufe (9, 22) ansteuert.4. impulse power supply according to claim 3, characterized in that a shunt ( 10 ) in the impulse circuit ( 15 ) or measuring circuit ( 20 , 23 , 24 ) is provided which controls the control stage ( 9 , 22 ). 5. Stromstoßnetzteil nach Anspruch 3, dadurch gekennzeich­ net, daß die Regelstufe (25) den Spannungsabfall an dem Heizleiterdraht (2) detektiert.5. impulse power supply according to claim 3, characterized in that the control stage ( 25 ) detects the voltage drop on the heating wire ( 2 ). 6. Stromstoßnetzteil nach Anspruch 1-5, dadurch gekenn­ zeichnet, daß eine Signalleuchte (13) vorgesehen ist, die den Stromfluß im Meßkreis (20, 23, 24) signalisiert.6. impulse power supply according to claims 1-5, characterized in that a signal lamp ( 13 ) is provided which signals the current flow in the measuring circuit ( 20 , 23 , 24 ). 7. Stromstoßnetzteil nach Anspruch 1-6, dadurch gekenn­ zeichnet, daß ein Meßinstrument (12) vorgesehen ist, das den Widerstandswert des Heizleiters (1) anzeigt.7. impulse power supply according to claims 1-6, characterized in that a measuring instrument ( 12 ) is provided which indicates the resistance value of the heating conductor ( 1 ). 8. Stromstoßnetzteil nach Anspruch 1-7, dadurch gekenn­ zeichnet, daß eine Betriebszustandsleuchte (17) vorgesehen ist, die das Ende des Stromstoßes im Stromstoßkreis (15) signalisiert.8. impulse power supply according to claims 1-7, characterized in that an operating state lamp ( 17 ) is provided which signals the end of the impulse in the impulse circuit ( 15 ). 9. Stromstoßnetzteil nach Anspruch 1-8, dadurch gekenn­ zeichnet, daß eine manuell betätigbare Triggertaste (8) vorgesehen ist, die den Stromstoß auslöst.9. impulse power supply according to claims 1-8, characterized in that a manually operable trigger button ( 8 ) is provided which triggers the surge. 10. Stromstoßnetzteil nach Anspruch 1-9, dadurch gekenn­ zeichnet, daß ein manuell betätigbarer Regler (21) vorgese­ hen ist, der den Stromstoß nach Zeitdauer und/oder Strom­ höhe steuert. 10. impulse power supply according to claims 1-9, characterized in that a manually operable controller ( 21 ) is hen vorgese that controls the surge after time and / or current height. 11. Stromstoßnetzteil nach Anspruch 1-10, dadurch gekenn­ zeichnet, daß die Stromversorgung für den Meßkreis (20) bzw. die Regelstufe (9, 22, 25) direkt aus dem Netztrafo (3) und unabhängig vom Stromstoßkreis (15) erfolgt.11. Impulse power supply according to claims 1-10, characterized in that the power supply for the measuring circuit ( 20 ) or the control stage ( 9 , 22 , 25 ) takes place directly from the mains transformer ( 3 ) and independently of the impulse circuit ( 15 ). 12. Stromstoßnetzteil nach Anspruch 1-11, dadurch gekenn­ zeichnet, daß die Ausgangsspannung des Stromstoßkreises (15) manuell vorwählbar ist.12. impulse power supply according to claim 1-11, characterized in that the output voltage of the impulse circuit ( 15 ) is manually preselectable. 13. Stromstoßnetzteil nach Anspruch 1-12, dadurch gekenn­ zeichnet, daß die Ausgangsspannung des Stromstoßkreises (15) bis zu 50 V beträgt.13. impulse power supply according to claims 1-12, characterized in that the output voltage of the impulse circuit ( 15 ) is up to 50 V. 14. Stromstoßnetzteil nach Anspruch 1-13, dadurch gekenn­ zeichnet, daß der Ausgangsstrom des Stromstoßkreises (15) bis zu 10 A beträgt.14. impulse power supply according to claims 1-13, characterized in that the output current of the impulse circuit ( 15 ) is up to 10 A. 15. Stromstoßnetzteil nach Anspruch 1-14, dadurch gekenn­ zeichnet, daß die Anschlußklemmen (4) des Netzteils (1) für den Heizleiter (2) Spannklemmbacken aufweisen, die an den Innenseiten insbesondere geriffelt sind.15. impulse power supply according to claims 1-14, characterized in that the terminals ( 4 ) of the power supply ( 1 ) for the heating conductor ( 2 ) have clamping jaws, which are corrugated in particular on the inner sides.
DE19914102677 1991-01-30 1991-01-30 Current step supply for heating conductor for sticking long parts - has measurement and control circuits controlling current according to heating conductor resistance Withdrawn DE4102677A1 (en)

Priority Applications (1)

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DE19914102677 DE4102677A1 (en) 1991-01-30 1991-01-30 Current step supply for heating conductor for sticking long parts - has measurement and control circuits controlling current according to heating conductor resistance

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DE19914102677 DE4102677A1 (en) 1991-01-30 1991-01-30 Current step supply for heating conductor for sticking long parts - has measurement and control circuits controlling current according to heating conductor resistance

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995016557A2 (en) * 1993-12-15 1995-06-22 Tokushu, Kogyo Kabushikigaisha Electrofusion fastening apparatus
EP0789504A3 (en) * 1996-02-09 1998-01-14 AKO-Werke GmbH & Co. KG Temperature measuring device for the control circuit of an electric radiant heater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995016557A2 (en) * 1993-12-15 1995-06-22 Tokushu, Kogyo Kabushikigaisha Electrofusion fastening apparatus
WO1995016557A3 (en) * 1993-12-15 1996-02-29 Tokushu Kogyo Kabushikigaisha Electrofusion fastening apparatus
EP0789504A3 (en) * 1996-02-09 1998-01-14 AKO-Werke GmbH & Co. KG Temperature measuring device for the control circuit of an electric radiant heater

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