DE2845652A1 - Hot air welding gun control - by air temp responsive PTC resistor controlling triac for heating element - Google Patents

Hot air welding gun control - by air temp responsive PTC resistor controlling triac for heating element

Info

Publication number
DE2845652A1
DE2845652A1 DE19782845652 DE2845652A DE2845652A1 DE 2845652 A1 DE2845652 A1 DE 2845652A1 DE 19782845652 DE19782845652 DE 19782845652 DE 2845652 A DE2845652 A DE 2845652A DE 2845652 A1 DE2845652 A1 DE 2845652A1
Authority
DE
Germany
Prior art keywords
heating element
temp
triac
welding gun
hot air
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Withdrawn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
DE19782845652
Other languages
German (de)
Inventor
Rene Baltus
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19782845652 priority Critical patent/DE2845652A1/en
Publication of DE2845652A1 publication Critical patent/DE2845652A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/012—Soldering with the use of hot gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
    • B23K3/04—Heating appliances
    • B23K3/047—Heating appliances electric
    • B23K3/0478—Heating appliances electric comprising means for controlling or selecting the temperature or power
    • 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
    • B29C66/90—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
    • 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
    • B29C66/9141—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
    • B29C66/91421—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 joining tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • 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
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • 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
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Control Of Resistance Heating (AREA)
  • Thermistors And Varistors (AREA)

Abstract

A hot air welding gun for use in welding thermoplastic articles is equipped with a triac in the supply circuit of the heating element spiral, and with a potentiometer for manual setting. The firing of the triac is controlled by a resistor with a positive temp. coefft. which responds to temp. rise and increases its resistance when the temp. should rise because of a reduction in the rate of the cold air supply. The changed resistance acts on a integrated circuit on a printed circuit board and reduces the firing pulses for the triac. This keeps the heating element spiral at the lowest temp., compatible with the air supply rate, and results in a longer life of the heating element. Damage due to fusion of the ceramic element holder at temp. exceeding 1000 degrees C is reliably eliminated.

Description

Beschreibung und Patentansprüche 2845652 Description and claims 2845652

Titel: Temperaturregelung von Heizelementen Anwendungsgebiet: Regeln von luftdurchströmten Heizelementen und Schutz der-- selben vor Übertemperatur, hier für Warmgasschweißgeräte.Title: Temperature control of heating elements Area of application: Control of heating elements through which air flows and protection of the same from excess temperature, here for hot gas welding machines.

Zweck: Die Leistung von Warmgasschweißgeräten in Abhängigkeit der Zuluftmenge ohne direkte Messung der Luftaustrittstemperatur zu regeln.Purpose: The performance of hot gas welding equipment as a function of the To regulate the supply air volume without direct measurement of the air outlet temperature.

Stand der Technik: Derartige Regelung ist dem Anmelder nicht bekannt.State of the art: The applicant is not aware of any such regulation.

Kritik des Standes der Technik: Durch das Fehlen einer entsprechenden Schaltung entsteht ein sehr schneller Verschleiß der Heizelemente durch unsachgemäßen Gebrauch, insbesondere zu geringer Zuluftmenge bei hoher Leistungseinstellung.Criticism of the prior art: Due to the lack of a corresponding The heating elements wear out very quickly due to improper switching Use, especially too little supply air at a high power setting.

Aufgabe: Der Erfindung liegt die Aufgabe zugrunde diesen.Verschleiß zu mindern und das Gerät anwendungsfreundlicher zu machen.Task: The invention is based on the task of these wear to reduce and to make the device more user-friendly.

Lösung: Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine in Abhängigkeit der Zuluftmenge sich verändernde Temperatur eines Widerstandes mittels Heißleiter gemessen, ausgewertet und auf die elektronische Steuerung gegeben, ein zurücksteuern der Leistung bewirkt.Solution: This object is achieved according to the invention in that a depending on the amount of supply air changing temperature of a resistor by means of NTC thermistors measured, evaluated and sent to the electronic control control back the performance causes.

Erzielbare Vorteile: Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß ein hoher Verschleiß von Heizelementen durch falsche Bedienung des Warmgasschweißgerätes, hier zu hohe Temperatureinstellung bei ungenügender Luftzufuhr, vert hindert wird. Der spezifische Widerstand eines Heißleiters sinkt bei steigender Temperatur. Verringert sich die Menge der Luftversorgung eines Warmgasschweißgerätes, so steigt die Temperatur des in der Spannungsversorgung eingebauten Vorwiderstandes der elektronischen Leistungsregelung. Der vor genannte Heißleiter befindet sich mit dem Vorwiderstand in thermischen Kontakt, d.h. eine Temperaturänderung des Vorwiderstandes, zieht eine Widerstandsänderung des Heinleit ters nach sich. Diese Änderung bewirkt wiederum durch Einwirken auf den integrierten Schaltkreis eine Verringerung der Zündimpulse des elektronischen Schalters" Triac, was wiederum die Heizwendeltemperatur des Heizelementes herabsetzt. Da die Heizwendeltemperatur das wichtigste Kriterium für die Lebensdauer der Heizelemente ist, bedeutet eine möglichst tiefe Temperatur eine max. hohe Lebensdauer. Die insbesondere dadurch, da bei Heizwendeltemperaturen von mehr als 1000 Celsius die Heizwendel umgebende Keramik leitend wird und somit eine Zerstörung durch schmelzender Keramik und Kurzschluß entsteht.Achievable Advantages: The advantages that can be achieved with the invention exist especially that high wear and tear of heating elements due to incorrect operation of the hot gas welding device, here too high temperature setting with insufficient air supply, vert is prevented. The specific resistance of an NTC thermistor decreases as it increases Temperature. If the amount of air supply to a hot gas welding device is reduced, this increases the temperature of the series resistor built into the power supply the electronic power control. The thermistor mentioned before is located with the series resistor in thermal contact, i.e. a temperature change of the series resistor, pulls a change in resistance of the Heinleit age. This change causes in turn, by acting on the integrated circuit, a reduction in Ignition pulses of the electronic switch "Triac, which in turn the heating coil temperature of the heating element. Because the heating coil temperature is the most important criterion for the service life of the heating elements means the lowest possible temperature a long service life. Especially because of the heating coil temperatures of more than 1000 Celsius, the ceramic surrounding the heating coil becomes conductive and thus destruction by melting ceramics and a short circuit occurs.

Beschreibung eines Ausführungsbeispieles:Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.Description of an exemplary embodiment: An exemplary embodiment of the The invention is illustrated in the drawing and will be described in more detail below.

Fig. a das Beispiel der Anwendung Fig. "b" das Blockschaltbild. Fig. A shows the example of the application. Fig. "B" shows the block diagram.

Die Figur a zeigt ein Warmgasschweißgerät wie es zum Schweißen von thermoplastischen Kunststoffen benutzt wird. Figure a shows a hot gas welding device as it is for welding is used by thermoplastics.

Hierbei sind in einem hohlen Griff die Teile 9 Steuerplatine; 3 Stellgleid (Poti); 4 Integrierter Schaltkreis; 5 Vorwiderstand; 6 Schaltglied (Triac); 7 Heizelement; 8 War luftaustritt; 10 Heißleiter NTC; 1 ist die Spannungsversorgung; 2 die Kaltluftversorgung.Here are the parts 9 control board in a hollow handle; 3 control unit (Poti); 4 integrated circuit; 5 series resistor; 6 switching element (triac); 7 heating element; 8 Was air outlet; 10 NTC thermistors; 1 is the power supply; 2 the cold air supply.

Die zugeführte Luftmenge (2) kühLt den Vorwiderstand (5).The amount of air supplied (2) cools the series resistor (5).

Ist die Luftmenge genügend (ca. 75 1/min) hat der HeiBleiter (10) einen hohen Widerstand, da er im kalten Zustand schlecht leitet. Wird die Zuluftmenge (2) ungenügend, bzw.If the air volume is sufficient (approx. 75 1 / min) the heat conductor (10) a high resistance, as it conducts poorly when cold. Will the supply air volume (2) insufficient or

unterliegt sie systembedingten Schwankungen wird der Vorwiderstand (s) nicht mehr so gut gekühlt, die Leitfähigkeit des Heißleiters (io) wird besser, die im integriertem Schaltkreis eingebaut Auswertschaltung vermindert die Zü impulse des Triac's (6) die Stromaufnahme des Heizelementes wird geringer. Somit sinkt die Wendel temperatur des Heizer mentes; ein schmelzen der Keramik wird verhindert und die Lebensdauer des Heizelementes verlängert.If it is subject to system-related fluctuations, the series resistance becomes (s) not so well cooled, the conductivity of the thermistor (io) is better, The evaluation circuit built into the integrated circuit reduces the Zü impulses of the triac (6) the power consumption of the heating element is lower. Thus the Coil temperature of the heater mentes; melting of the ceramic is prevented and extends the service life of the heating element.

L e e r s e i t eL e r s e i t e

Claims (1)

Oberbegriff: Patentansprüche Arbeitsluftabhängige Temperaturregelung für WarmgasschweiR-geräte. -ennzeichnender Teil: dadurch gekennzeichnet, daß ein Heißleiter die Luftmengenabhängige Temperatur eines Widerstandes mißt und die Widerstandsänderung des Heißleiters zum Regeln der Heizwendeltemperatur genutzt wird.Generic term: Patent claims temperature control dependent on working air for hot gas welding machines. -characteristic part: characterized in that a NTC thermistor measures the air volume-dependent temperature of a resistor and the change in resistance of the thermistor is used to regulate the heating coil temperature.
DE19782845652 1978-10-20 1978-10-20 Hot air welding gun control - by air temp responsive PTC resistor controlling triac for heating element Withdrawn DE2845652A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782845652 DE2845652A1 (en) 1978-10-20 1978-10-20 Hot air welding gun control - by air temp responsive PTC resistor controlling triac for heating element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782845652 DE2845652A1 (en) 1978-10-20 1978-10-20 Hot air welding gun control - by air temp responsive PTC resistor controlling triac for heating element

Publications (1)

Publication Number Publication Date
DE2845652A1 true DE2845652A1 (en) 1980-04-30

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DE19782845652 Withdrawn DE2845652A1 (en) 1978-10-20 1978-10-20 Hot air welding gun control - by air temp responsive PTC resistor controlling triac for heating element

Country Status (1)

Country Link
DE (1) DE2845652A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743164A2 (en) * 1995-05-15 1996-11-20 Hainsberger Metallwerk GmbH Process and apparatus for hot gas welding of plastics
DE19517752A1 (en) * 1995-05-15 1996-11-21 Hainsberger Metallwerk Gmbh Plastic film hot gas welding for high precision temp. control

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743164A2 (en) * 1995-05-15 1996-11-20 Hainsberger Metallwerk GmbH Process and apparatus for hot gas welding of plastics
DE19517752A1 (en) * 1995-05-15 1996-11-21 Hainsberger Metallwerk Gmbh Plastic film hot gas welding for high precision temp. control
EP0743164A3 (en) * 1995-05-15 1997-12-10 Hainsberger Metallwerk GmbH Process and apparatus for hot gas welding of plastics
US6134387A (en) * 1995-05-15 2000-10-17 Toss; Ramon Process and device for hot gas welding of plastic sheets with electrically heated tubular gas flow conduit

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