CH445671A - Electric hot air blasting device, especially for welding thermoplastics - Google Patents

Electric hot air blasting device, especially for welding thermoplastics

Info

Publication number
CH445671A
CH445671A CH97167A CH97167A CH445671A CH 445671 A CH445671 A CH 445671A CH 97167 A CH97167 A CH 97167A CH 97167 A CH97167 A CH 97167A CH 445671 A CH445671 A CH 445671A
Authority
CH
Switzerland
Prior art keywords
hot air
air
blasting device
handle
tube
Prior art date
Application number
CH97167A
Other languages
German (de)
Inventor
Fuellemann Walter
Original Assignee
Ditzler Walter Robert
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 Ditzler Walter Robert filed Critical Ditzler Walter Robert
Priority to CH97167A priority Critical patent/CH445671A/en
Priority to AT278967A priority patent/AT298047B/en
Publication of CH445671A publication Critical patent/CH445671A/en
Priority to DE1704061A priority patent/DE1704061C3/en
Priority to FR1556453D priority patent/FR1556453A/fr
Priority to US698763A priority patent/US3560710A/en
Priority to NL6800907A priority patent/NL6800907A/xx

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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0423—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between hand-held air guns
    • 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
    • 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
    • H05B3/00—Ohmic-resistance 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pipe Accessories (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Description

  

  Elektrisches Heissluft-Strahlgerät, insbesondere zum Schweissen  von thermoplastischen     Kunststoffen       Bei den bisherigen elektrischen Heissluft-Strahlgerä  ten mit Pressluftzufühmung und elektrischem Wider  standsheizkörper mit Anschlusskabel erfolgt die Zufüh  rung und der Anschluss des Pressluftschlauches getrennt  vom Stromzuführungskabel, was sich für die Hand  habung dies Gerätes als störend erwiesen hab. Eine       Änderung    der     Lufttemperatur    bei konstanter Luftmenage  wird entweder durch Auswechslung der Heizkörper oder  durch     Stufenschaltung    oder aber durch Vorschalten  eines Regeltransformers erreicht.

   Besonders nachteilig  ist aber der     Zusammenbau    des     Heizkörpers    mit dem  Heissluftgerät,     bei    welchem die Oberfläche des     Heiss-          luftbereiters    Temperaturwerte     erreichen    kann, die zu  Unfällen und     Brandausbrüchen    führen können. Eine       Sicherung    gegen     Überhitzung    bei     Verminderung    der  Pressluftzufuhr oder Ausfall der letzteren ist nicht vor  gesehen.  



  Gegenstand der     Erfindung    ist ein     elektrisches    Heiss  luft-Strahlgerät, insbesondere zum Schweissen von ther  moplastischen Kunststoffen, das sich von dien bekann  ten Geräten     dieser    Art dadurch     unterscheidet,

      dass im  Handgriff eine von der     zugeführten        Pressluft        umspülte          elektronische        Steuervorrichtung        mit        einem    die     stufen-          lose        Regulierung    der     Heizleistung        ermöglichenden        Po-          tentiometer        eingebaut    ist und dass in einem an den  Handgriff des Gerätes     angebauter,

          einen        Widerstands-          Heizkörper    .einsschliessenden Heissluftbereiter die Luft       in    mehreren den     Heizkörper        mantelartig        umschliessenden     hohlzylindrischem Kanälen siphonartig im äusseren  Kanal nach     vorn,    im     mittleren    Kanal zurück     und    im       inneren,    den Heizkörper     umgebenden    Kanal     wieder     nach vorn zur     Strahldüse        geführt    ist,

   wobei     im        Rück-          führungskanal,    in     einem        verengten        Teil        desselben,    ein  den     Heizstromkreis    beherrschender     Thermostat    einge  baut ist.  



  In der Zeichnung ist eine beispielsweise. Ausfüh  rungsform des     Erfindungsgegenstandes    dargestellt, und       zwar        zeigt:       Fig. 1 einen Teillängsschnitt durch das Heissluft  Strahlgerät,  Fig. 2 den Vorderteil dies Gerätes in grösserem  Massstab,  Fig. 3 einen Querschnitt nach der Linie 111-III in  Fig. 2 und  Fig. 4 das Schaltschema der in das Gerät eingebau  ten elektronischen Steuervorrichtung.  



  Das dargestellte elektrische Heissluft-Strahlgerät  weist     einen        Handgriff    1 auf, in ,dessen hinteres Ende  ein Pressluftschlauch 2 eingeführt ist. Das Stromzu  führungskabel 4 ist in dien Pressluftschlauch 2 eingelegt  und zusammen mit diesem in dien     Handgriff    1 ein  geführt, in welchem das Ende     des    Kabels durch eine  separate Zugentlastungsbride 5 auf der gedruckten       Schaltung    7 gesichert ist.

   In einem von der     zugeführten          Pressluft        durchströmten    Hohlraum 6 des Handgriffes 1  ist auf einem Träger 7     eine    elektronische Steuervor  richtung 8 für eine stufenlose Regulierung der     Heiz-          leistung    untergebracht, deren Schaltschema in Fig. 4  dargestellt ist.

   9 ist ein Potentiometer zum Regulieren  des     Heizstromes.    An das Vorderende des     Handgriffes     1 ist     der        Heissluftbereiter    10 ,angebaut, der aus     einem     äusseren Rohr 11, einem mittleren Luftumlenkungsrohr  12 und einem inneren Luftführungsrohr 13 gebildet ist.

    Das     äussere    Rohr 11     bildet    dien     Mantel    des     Heissluft-          bereiters    und ist durch einen     Flansch    11' mit dem  Handgriff 1     verbunden.    An der     vorderen        Stirnwand     11" des     Mantelrohres    11     isst    aussenseitig die     Heissluft-          Strahldüse    14     angeordnet,

          während    auf     dein        Innenseite     derselben das     innere,    an seinem Hinterende offene     Luft-          führungs:rohr    13     befestigt    ist. 15     ist    ein     Widerstands-          heizkörper,        :der    zwecks Bildung eines     Heissluftkanals    16  mit     Spielraum    in das     innere    Rohr 13     eingebaut    ist,  so dass die Widerstandsheizwendel direkt im Luftstrom  liegt.

   Das als     Luftumlenkurgsrohr        dienende    mittlere  Rohr 12     .ist        vorn        teilweise    offen und     hinten        mit        einem          Abschlussdeckel    12' versehen. Es bildet zusammen mit  dem     inneren    Rohr 13 den     Rückströmkanal    17. Zwischen      dem Umlenkrohr 13 und dem Mantelrohr 11 ist der  äussere hohlzylindrische Luftkanal 18 gebildet. In die  sem. Kanal     wird    die Luft unter wirksamer Kühlung des  Mantelrohres 11 vorgewärmt.

   Nahe am     Vorderende    des  mittleren Rohres 12 ist zwischen diesem und dem  inneren Rohr 11 ein Bimetall-Thermostat 19 in dien  Rückströmkanal 17 eingebaut. Letzterer befindet sich  an einer den Rückströmkanal 17 verengenden Durch  gangsöffnung 20 (Fig. 3) des vorderen Teilabschlusses  12" des mittleren     Rohres    12.

   An dieser Durchgangs  öffnung 20 ist die     Strömungsgeschwindigkeit    der Luft  stark erhöht, so dass ein Stromunterbruch durch den  Thermostat erst bei ungenügender Luftzufuhr oder Aus  bleiben derselben eintreten kann. 21 ist ein Thermistor  oder Halbleiter zur Konstanthaltung der Heisslufttem  peratur, der     unmittelbar    vor dem     Heissluftaustritt    zur       Strahldüse    14 in den     Heissluftkanal    16     ragt,        während     dessen Arschlusspartie ausserhalb des inneren Rohres  13 in der Kaltluftzone 18 liegt.  



  Die aus dem Schaltschema (Fig. 4) ersichtliche, im  Hohlraum des Handgriffes 1 untergebrachte     elektroni-          sche    Steuervorrichtung erlaubt eine     stufenlose    Regulie  rung der Heizleistung des Widerstandes RL des Heiz  körpers 15 über ein Potentiometer RP. Für die Hei  zungsregulierung wird. ein TRIAC verwendet, welcher  über einen stabilisierten Spannungsteiler und zwei     Zener-          Dioden    Dl, D2, die mit den Transistoren TI, T2 in  Gegenschaltung gekoppelt sind,     ausgesteuert    wird.

   Mit  dem stabilisierten Spannungsteiler, der durch den     Ther-          mistor    RT und das Potentiometer RP gebildet ist, wird  die Basis des Transistors ausgesteuert. Die     Zener-Dio-          den    haben den Zweck, eine Netzspannungsschwankung  von              10/'j    zu     kompensieren.    Je nach der     Einstellung     des Potentiometers RP und der Höhe des     Thermistor-          widerstandes,    der durch die Austrittstemperatur an der  Düse 14 bestimmt wird, steigt oder fällt     die    Steuer  spannung am TRIAC.

   Somit wird die Leistung der  Heizung durch     Phasenschnitt    gesteuert. welcher von der  Temperatur des Luftstromes abhängig ist.     Diese    Schal  tung ermöglicht, die Lufttemperatur an der Düse kon  stant zu halten, und zwar unabhängig von Netzspan  nungsschwankungen bis   10% und der Luftdurch  flussmenge.



  Electric hot air blasting device, especially for welding thermoplastics With the previous electric hot air blasting devices with compressed air supply and electrical resistance heating elements with connecting cables, the supply and connection of the compressed air hose is separate from the power supply cable, which is annoying for the handling of this device have proven A change in the air temperature with constant air flow is achieved either by replacing the radiators or by step switching or by connecting a regulating transformer upstream.

   Particularly disadvantageous, however, is the assembly of the heating element with the hot air device, at which the surface of the hot air device can reach temperature values which can lead to accidents and outbreaks of fire. A safeguard against overheating if the compressed air supply is reduced or if the latter fails is not provided.



  The subject of the invention is an electric hot air blasting device, in particular for welding thermoplastic plastics, which differs from dien known devices of this type in that

      that an electronic control device with a potentiometer allowing the continuous regulation of the heating power is built into the handle, and that an electronic control device is built into the handle of the device.

          A hot air heater including a resistance heating element, the air in several hollow cylindrical ducts enclosing the heating element in a siphon-like manner in the outer duct to the front, in the middle duct back and in the inner duct surrounding the heating element back to the jet nozzle,

   a thermostat controlling the heating circuit is built into the return duct, in a narrowed part thereof.



  In the drawing is one example. Ausfüh approximate form of the subject of the invention shown, namely: Fig. 1 is a partial longitudinal section through the hot air blasting device, Fig. 2 the front part of this device on a larger scale, Fig. 3 is a cross section along the line 111-III in Fig. 2 and Fig. 4 the circuit diagram of the electronic control device built into the device.



  The electrical hot air blasting device shown has a handle 1, in the rear end of which a compressed air hose 2 is inserted. The Stromzu lead cable 4 is inserted into the compressed air hose 2 and guided together with this in the handle 1, in which the end of the cable is secured by a separate strain relief clip 5 on the printed circuit 7.

   In a cavity 6 of the handle 1 through which the supplied compressed air flows, an electronic control device 8 for stepless regulation of the heating output is accommodated on a carrier 7, the circuit diagram of which is shown in FIG.

   9 is a potentiometer for regulating the heating current. The hot air maker 10, which is formed from an outer tube 11, a central air deflection tube 12 and an inner air guide tube 13, is built onto the front end of the handle 1.

    The outer tube 11 forms the jacket of the hot air maker and is connected to the handle 1 by a flange 11 '. The hot air jet nozzle 14 is arranged on the outside of the front end wall 11 ″ of the jacket tube 11,

          while the inner air duct 13, which is open at its rear end, is attached to its inside. 15 is a resistance heating element: which is built into the inner tube 13 with clearance in order to form a hot air duct 16 so that the resistance heating coil lies directly in the air flow.

   The middle tube 12 serving as an air deflector tube is partially open at the front and is provided with a cover 12 'at the rear. Together with the inner tube 13, it forms the return flow channel 17. The outer hollow-cylindrical air channel 18 is formed between the deflection tube 13 and the jacket tube 11. In this. Channel, the air is preheated with effective cooling of the jacket tube 11.

   Near the front end of the central tube 12, a bimetallic thermostat 19 is installed in the return flow channel 17 between this and the inner tube 11. The latter is located on a through opening 20 (FIG. 3) of the front partial closure 12 ″ of the central tube 12 that narrows the return flow channel 17.

   At this passage opening 20, the flow speed of the air is greatly increased, so that a current interruption through the thermostat can only occur if there is insufficient air supply or if the same remains. 21 is a thermistor or semiconductor for keeping the hot air temperature constant, which protrudes into the hot air duct 16 immediately before the hot air outlet to the jet nozzle 14, while its connection part is outside the inner tube 13 in the cold air zone 18.



  The electronic control device, which can be seen from the circuit diagram (FIG. 4) and is housed in the cavity of the handle 1, allows the heating output of the resistor RL of the heating body 15 to be continuously regulated via a potentiometer RP. For the heating regulation is. a TRIAC is used, which is controlled via a stabilized voltage divider and two Zener diodes Dl, D2, which are coupled to the transistors TI, T2 in counter-circuit.

   The base of the transistor is controlled with the stabilized voltage divider, which is formed by the thermistor RT and the potentiometer RP. The purpose of the Zener diodes is to compensate for a mains voltage fluctuation of 10 / 'j. Depending on the setting of the potentiometer RP and the level of the thermistor resistance, which is determined by the outlet temperature at the nozzle 14, the control voltage on the TRIAC rises or falls.

   Thus the output of the heater is controlled by phase cutting. which depends on the temperature of the air flow. This circuit enables the air temperature at the nozzle to be kept constant, regardless of mains voltage fluctuations of up to 10% and the air flow rate.

Claims (1)

PATENTANSPRUCH Elektrisches Heissluft-Strahlgerät, insbesondere zum Schweissen von. thermoplastischen Kunststoffen, dadurch gekennzeichnet, dass im Handgriff (1) eine von der zugeführten Pressluft umspülte elektronische Steuervor richtung (8) mit einem die. PATENT CLAIM Electric hot air blasting device, especially for welding. thermoplastic plastics, characterized in that in the handle (1) an electronic control device (8) around which the supplied compressed air flows with a die. stufenlose Regulierung der Heizleistung ermöglichenden Potentiometer (RP) ein gebaut ist und dass in einem an den Handgriff des Gerätes angebauten, einen Widerstandsheizkörper (15) einschliessendem Heissluftbereiter (10) die Luft in meh reren den Heizkörper mantelartig umschliessenden hohl- zylindrishen Kanälen (16, 17, 18) siphonartig im äusseren Kanal (18) nach vorn, im mittleren Kanal (17) zurück und im inneren Kanal (16) wieder nach vorn zur Strahldüse (14) geführt ist, A potentiometer (RP) that enables continuous regulation of the heating power is built in and that in a hot air generator (10) which is attached to the handle of the device and includes a resistance heater (15), the air in several hollow-cylindrical ducts (16, 17) surrounding the heater in a jacket-like manner , 18) is siphoned forward in the outer channel (18), back in the middle channel (17) and again forward in the inner channel (16) to the jet nozzle (14), wobei im Rück- führungskanail (17), in einem verengten Teil (20) des selben, ein dien Heizstromkreis beherrschender Thermo stat (19) eingebaut ist. UNTERANSPRÜCHE 1. Heissluft-Strahlgerät nach. wherein in the return channel (17), in a narrowed part (20) of the same, a thermostat (19) dominating the heating circuit is installed. SUBSTANTIAL CLAIMS 1. Hot air blasting device according to. Patentanspruch, da durch gekennzeichnet, dass der Heissluftbereiter aus drei mit Spiel ineinandergreifenden, den Heizkörper (15) mantelartig umgebenden Luftführungsrohren (11, 12, 13) zusammengesetzt ist, so dass zwischen den Rohren hohlzylindrische Kanäle (16, 17, 18) gebildet sind, wobei das mittlere Rohr als Umlenkrohr (12) an seinem Hinterende mit Abschlussdeckel (12') und an seinem Vorderende mit Teilabschlussdeckel (12"). Patent claim, characterized in that the hot air maker is composed of three air guide tubes (11, 12, 13) which interlock with play and surround the heating element (15) like a jacket, so that hollow cylindrical channels (16, 17, 18) are formed between the tubes, wherein the middle tube as a deflection tube (12) at its rear end with a cover (12 ') and at its front end with a partial cover (12 "). versehen, an letzterem eine verengte Durchströmöffnung (20) bildet, in die ein den Heizstromkreis beherrschen der Thermostat (19) eingebaut ist. 2. Heissluft-Strahlgerät nach Patentanspruch, da durch gekennzeichnet, dass in das innere, den Heiz körper (15) unmittelbar umgebende Luftführungsrohr (13) ein nahe an der Strahldüse in den Heissluftbereich ragender Thermistor (21) für die Regelung der Heiss luft-Temperatur eingebaut ist, wobei dessen Anschluss partie noch in der vom Mantelrohr (11) umschlossenen Kaltluftzone (18) liegt. 3. provided, on the latter forms a narrowed through-flow opening (20), in which a heating circuit dominate the thermostat (19) is built. 2. Hot air blasting device according to claim, characterized in that in the inner, the heating body (15) immediately surrounding the air duct (13) a close to the jet nozzle in the hot air area protruding thermistor (21) for controlling the hot air temperature is installed, the connection part still lying in the cold air zone (18) enclosed by the jacket tube (11). 3. Heissluft-Strahlgerät nach Patentanspruch, da durch gekennzeichnet, dass :das Stromzuführungskabel (4) in den der Zuführung der Pressluft dienenden Schlauch (2) eingelagert ist, und beide Leitungen als kombinierte Zuführungsleitung in den Handgriff (1) des Gerätes eingeführt sind, in welchem sowohl das Ende des Schlauches (2) als auch das Ende des Kabels (4) je durch eine separate Zugentlastungsbride (3 bzw. 5) gesichert ist. Hot air blasting device according to claim, characterized in that: the power supply cable (4) is embedded in the hose (2) serving to supply the compressed air, and both lines are inserted as a combined supply line into the handle (1) of the device, in which both the end of the hose (2) and the end of the cable (4) are each secured by a separate strain relief clamp (3 or 5).
CH97167A 1967-01-20 1967-01-20 Electric hot air blasting device, especially for welding thermoplastics CH445671A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CH97167A CH445671A (en) 1967-01-20 1967-01-20 Electric hot air blasting device, especially for welding thermoplastics
AT278967A AT298047B (en) 1967-01-20 1967-03-23 Hot air welding device
DE1704061A DE1704061C3 (en) 1967-01-20 1968-01-13 Electric hot air blasting device, especially for welding thermoplastics
FR1556453D FR1556453A (en) 1967-01-20 1968-01-17
US698763A US3560710A (en) 1967-01-20 1968-01-18 Electrically heated hot-air dispenser
NL6800907A NL6800907A (en) 1967-01-20 1968-01-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH97167A CH445671A (en) 1967-01-20 1967-01-20 Electric hot air blasting device, especially for welding thermoplastics

Publications (1)

Publication Number Publication Date
CH445671A true CH445671A (en) 1967-10-31

Family

ID=4199454

Family Applications (1)

Application Number Title Priority Date Filing Date
CH97167A CH445671A (en) 1967-01-20 1967-01-20 Electric hot air blasting device, especially for welding thermoplastics

Country Status (6)

Country Link
US (1) US3560710A (en)
AT (1) AT298047B (en)
CH (1) CH445671A (en)
DE (1) DE1704061C3 (en)
FR (1) FR1556453A (en)
NL (1) NL6800907A (en)

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US3622746A (en) * 1969-07-30 1971-11-23 Calor Sa Electrical curling irons
WO1984003552A1 (en) * 1983-03-07 1984-09-13 Skilten Electronics Heated gas blower device

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US5111527A (en) * 1990-03-12 1992-05-05 Gte Products Corporation Electric heater with thermistor temperature control
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DE9304449U1 (en) * 1993-03-24 1993-05-27 Rovema - Verpackungsmaschinen GmbH, 6301 Fernwald Hot air welding device
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US6144802A (en) * 1999-06-29 2000-11-07 Hyundai Electronics Industries Co., Ltd. Fluid heater for semiconductor device
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3610881A (en) * 1968-07-29 1971-10-05 Trigg Stewart Portable electric air-heating gun and oven
US3622746A (en) * 1969-07-30 1971-11-23 Calor Sa Electrical curling irons
WO1984003552A1 (en) * 1983-03-07 1984-09-13 Skilten Electronics Heated gas blower device

Also Published As

Publication number Publication date
NL6800907A (en) 1968-07-22
US3560710A (en) 1971-02-02
DE1704061C3 (en) 1975-01-30
DE1704061B2 (en) 1974-06-12
AT298047B (en) 1972-04-25
FR1556453A (en) 1969-02-07
DE1704061A1 (en) 1971-09-02

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