CH411320A - Radiators heated by pulse currents - Google Patents

Radiators heated by pulse currents

Info

Publication number
CH411320A
CH411320A CH1382963A CH1382963A CH411320A CH 411320 A CH411320 A CH 411320A CH 1382963 A CH1382963 A CH 1382963A CH 1382963 A CH1382963 A CH 1382963A CH 411320 A CH411320 A CH 411320A
Authority
CH
Switzerland
Prior art keywords
heating tape
carrier body
heater according
electrically
heating
Prior art date
Application number
CH1382963A
Other languages
German (de)
Inventor
Hans Dipl Ing Hirzel
Original Assignee
Sig Schweiz Industrieges
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 Sig Schweiz Industrieges filed Critical Sig Schweiz Industrieges
Priority to CH1382963A priority Critical patent/CH411320A/en
Priority to GB45862/64A priority patent/GB1091917A/en
Priority to DESCH36088A priority patent/DE1296781B/en
Publication of CH411320A publication Critical patent/CH411320A/en

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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/224—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip being a resistive ribbon, a resistive band or a resistive strip
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/228—Heated wire resistive ribbon, resistive band or resistive strip characterised by the means for electrically connecting the ends of said heated wire, resistive ribbon, resistive band or resistive strip
    • 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
    • B29C65/38—Impulse 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/347—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients
    • B29C66/3472—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients in the plane of the joint, e.g. along the joint line in the plane of the joint or perpendicular to the joint line in the plane of the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81261—Thermal properties, e.g. thermal conductivity, thermal expansion coefficient
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8187—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects
    • B29C66/81871—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects of the welding jaws
    • 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
    • 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
    • H05B3/62—Heating elements specially adapted for furnaces
    • H05B3/64—Heating elements specially adapted for furnaces using ribbon, rod, or wire heater
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Description

  

  
 



  Durch Impulsströme beheizter Heizkörper
Die Erfindung betrifft einen durch Impulsströme beheizten Heizkörper zum Verschweissen von elektrisch nicht leitenden, heisssiegelfähigen Folien mit einem Heizbändchen.



   Während die ebenfalls bekannten, durch eingebaute Heizelemente indirekt beheizten Heizkörper für ähnliche Zwecke dauernd auf einer annähernd konstanten Temperatur gehalten werden, sollen bei Impulsheizung die Heizkörper möglichst kühl bleiben.



  Die dem Heizelement nur im Moment des Schweissvorganges impulsweise zugeführte Energie soll möglichst weitgehend auf das zu verschweissende Objekt übertragen werden, und das mit diesem in Berührung stehende Heizbändchen soll sich wieder unter die Schweisstemperatur abkühlen, bevor es von der Schweissnaht abgehoben wird. Die nicht in die Schweissnaht übertragene Wärme soll so rasch als möglich in den Trägerkörper des Heizbändchens abfliessen.



   Die Erfindung bezweckt, die Leistungsfähigkeit von derartigen Impulsheizkörpern zu steigern, d. h. eine raschere Folge von   Arbeitstakten    bei einwandfreier Qualität der Schweissnaht zu ermöglichen.



   Die Erfindung ist dadurch gekennzeichnet, dass das Heizbändchen auf einem thermisch gut leitenden Tragkörper gespannt ist und im Vergleich zum Trägerkörper eine sehr kleine Masse aufweist, zum Zwecke, eine rasche Wärmeableitung der im Heizbändchen durch den Stromimpuls erzeugten Wärme zu erzielen.



   In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes mit Varianten dargestellt.



  Es zeigen:
Fig. 1 einen Abschnitt eines erfindungsgemässen Heizkörpers und
Fig. 2 und 3 je ein Teilstück des Heizkörpers in grösserem Massstab mit verschiedenartigen Ausnehmungen im das Heizbändchen stützenden Teil des Trägerkörpers.



   Der Heizkörper umfasst einen thermisch gut leitenden Trägerkörper 1, z. B. aus Eisen oder Leichtmetall, der einen Kopf 2 von kleinerer Breite aufweist, dessen obere Fläche 2a leicht gewölbt ausgebildet ist. Über der Fläche 2a liegt ein dünnes Heizbändchen 3, das durch zwei mittels Schrauben 4 befestigte Leisten 5 festgeklemmt ist. Das Heizbändchen 3 wird in Längsrichtung von Stromimpulsen durchflossen, die durch Zuleitungen 6 zugeführt werden. Damit der Strom nicht in den Trägerkörper 1 abfliesst, muss dieser gegenüber dem Heizbändchen 3 elektrisch isoliert sein. Anderseits soll ein möglichst guter Wärmeabfluss vom Heizbändchen auf den Trägerkörper gewährleistet sein, damit das Heizbändchen, nachdem es durch einen Stromimpuls erhitzt wurde, und die Schweissung durchgeführt ist, möglichst rasch wieder abkühlt.

   Es hat sich beispielsweise als zweckmässig erwiesen, auf die Unterseite des Heizbändchens 3 eine elektrisch isolierende Schicht 3a (Fig. 2 bzw. 3), z. B. Aluminiumoxyd, Glas oder Keramik aufzubringen, z. B. aufzuspritzen.



  Die Schicht könnte selbstverständlich auch auf die Oberfläche des Kopfes 2   aufgebracht    werden. Bei Anwendung einer Aluminium-Legierung wird die elektrisch isolierende Aluminiumoxyd-Schicht mit Vorteil durch anodische Oxydation erzeugt.



   Anderseits könnte das Heizbändchen 2 auch aus elektrisch nicht leitendem Material bestehen, auf dessen äussere Oberfläche eine elektrisch leitende Schicht aufgedampft oder aufgepritzt ist. Wie die Fig. 2 und 3 zeigen, können an der Oberfläche des Kopfes 2 Ausnehmungen 7 bzw. 8 angeordnet sein, die sich über die ganze Länge oder nur über einen gewissen Abschnitt des Kopfes 2 enstrecken können.



  Das Heizbändchen erhitzt sich dann an diesen Stel  len, an denen kein direkter Wärmeabfluss in den Trägerkörper stattfindet, rascher und höher. Es lassen sich auf diese Weise innerhalb der Schweisszone linienförmige Streifen mit besonders guter Bindung erzielen und damit hochwertige, wirklich dichte Nähte erreichen.



   Um zu verhindern, dass der Trägerkörper 1 sich zu stark erwärmt, kann er mit Hohlräumen, z. B.



  Längsbohrungen 9 (Fig. 1) ausgerüstet werden, durch die Kühlwasser oder Druckluft geleitet wird.   



  
 



  Radiators heated by pulse currents
The invention relates to a heating element heated by pulsed currents for welding electrically non-conductive, heat-sealable foils with a heating tape.



   While the also known radiators indirectly heated by built-in heating elements are kept at an approximately constant temperature for similar purposes, the radiators should remain as cool as possible with pulse heating.



  The energy supplied to the heating element in pulses only at the moment of the welding process should be transferred as largely as possible to the object to be welded, and the heating tape in contact with it should cool down again to below the welding temperature before it is lifted from the weld seam. The heat that is not transferred into the weld seam should flow away into the carrier body of the heating tape as quickly as possible.



   The invention aims to increase the performance of such impulse heaters, i. H. to enable a more rapid sequence of work cycles with perfect weld seam quality.



   The invention is characterized in that the heating tape is stretched on a thermally highly conductive carrier body and has a very small mass compared to the carrier body, for the purpose of achieving rapid heat dissipation of the heat generated in the heating tape by the current pulse.



   The drawing shows an exemplary embodiment of the subject matter of the invention with variants.



  Show it:
1 shows a section of a heater according to the invention and
FIGS. 2 and 3 each show a section of the heating element on a larger scale with different types of recesses in the part of the carrier element supporting the heating tape.



   The radiator comprises a thermally highly conductive support body 1, for. B. made of iron or light metal, which has a head 2 of smaller width, the upper surface 2a is slightly curved. A thin heating tape 3, which is clamped by two strips 5 fastened by means of screws 4, lies above the surface 2a. The heating tape 3 is traversed in the longitudinal direction by current pulses which are fed through supply lines 6. So that the current does not flow into the carrier body 1, it must be electrically isolated from the heating tape 3. On the other hand, the best possible heat flow from the heating tape to the support body should be ensured so that the heating tape cools down again as quickly as possible after it has been heated by a current pulse and the welding has been carried out.

   It has proven to be useful, for example, to apply an electrically insulating layer 3a (FIG. 2 or 3), for. B. aluminum oxide, glass or ceramic, z. B. to spray.



  The layer could of course also be applied to the surface of the head 2. When using an aluminum alloy, the electrically insulating aluminum oxide layer is advantageously produced by anodic oxidation.



   On the other hand, the heating tape 2 could also consist of electrically non-conductive material, on the outer surface of which an electrically conductive layer is vapor-deposited or sprayed. As FIGS. 2 and 3 show, recesses 7 and 8 can be arranged on the surface of the head 2, which can extend over the entire length or only over a certain section of the head 2.



  The heating tape then heats up faster and higher at those points where there is no direct heat flow into the carrier body. In this way, linear strips with a particularly good bond can be achieved within the welding zone and thus high-quality, really tight seams can be achieved.



   In order to prevent the carrier body 1 from heating up too much, it can be provided with cavities, e.g. B.



  Longitudinal bores 9 (Fig. 1) are equipped, through which cooling water or compressed air is passed.

Claims (1)

PATENTANSPRUCH Durch Impulsströme beheizter Heizkörper zum Verschweissen von elektrisch nicht leitenden, heisssiegelfähigen Folien mit einem Heizbändchen, dadurch gekennzeichnet, dass dieses auf einem thermisch gut leitenden Trägerkörper gespannt ist, wobei das Heizbändchen im Vergleich zum Trägerkörper eine sehr kleine Masse aufweist, zum Zwecke, eine rasche Wärmeableitung der im Heizbändchen durch den Stromimpuls erzeugten Wärme zu erzielen. PATENT CLAIM Radiators heated by pulse currents for welding electrically non-conductive, heat-sealable foils with a heating tape, characterized in that this is stretched on a thermally highly conductive carrier body, the heating tape having a very small mass compared to the carrier body, for the purpose of rapid heat dissipation to achieve the heat generated in the heating tape by the current pulse. UNTERANSPRÜCHE 1. Heizkörper nach Patentanspruch, dadurch gekennzeichnet, dass das Heizbändchen (3) aus elektrisch leitendem Material besteht und auf die Unterseite des Heizbändchens eine elektrisch isolierende Schicht aufgebracht ist. SUBCLAIMS 1. Heater according to claim, characterized in that the heating tape (3) consists of electrically conductive material and an electrically insulating layer is applied to the underside of the heating tape. 2. Heizkörper nach Patentanspruch, dadurch gekennzeichnet, dass das Heizbändchen (3) aus elektrisch nicht leitendem Material besteht und dass auf die Oberseite des Heizbändchens eine elektrisch leitende Schicht aufgebracht ist. 2. Heater according to claim, characterized in that the heating tape (3) consists of electrically non-conductive material and that an electrically conductive layer is applied to the top of the heating tape. 3. Heizkörper nach Patentanspruch, dadurch gekennzeichnet, dass der Trägerkörper (1) aus elektrisch leitendem Material besteht und dass er mindestens an der Fläche (2a), die mit dem Heizbändchen (3) in Berührung kommt, eine elektrisch isolierende Schicht aufweist. 3. Heater according to claim, characterized in that the carrier body (1) consists of electrically conductive material and that it has an electrically insulating layer at least on the surface (2a) which comes into contact with the heating tape (3). 4. Heizkörper nach Patentanspruch, dadurch gekennzeichnet, dass der Trägerkörper (1) im Bereich der beim Schweissen wirksamen Oberfläche des Heizbändchens Ausnehmungen (7, 8) aufweist. 4. Heater according to claim, characterized in that the carrier body (1) has recesses (7, 8) in the region of the surface of the heating tape which is effective during welding. 5. Heizkörper nach Patentanspruch, dadurch gekennzeichnet, dass der Trägerkörper (1) für den Durchfluss eines Kühlmittels bestimmte Hohlräume (9) aufweist. 5. Heater according to claim, characterized in that the carrier body (1) has certain cavities (9) for the flow of a coolant. 6. Heizkörper nach Patentanspruch, dadurch gekennzeichnet, dass die beim Schweissen wirksame Oberfläche des Heizbändchens gewölbt ist. 6. Radiator according to claim, characterized in that the surface of the heating tape that is effective during welding is curved.
CH1382963A 1963-11-12 1963-11-12 Radiators heated by pulse currents CH411320A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CH1382963A CH411320A (en) 1963-11-12 1963-11-12 Radiators heated by pulse currents
GB45862/64A GB1091917A (en) 1963-11-12 1964-11-11 Improvements in or relating to heaters which are heated by impulse currents
DESCH36088A DE1296781B (en) 1963-11-12 1964-11-11 Radiator heated by impulse currents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1382963A CH411320A (en) 1963-11-12 1963-11-12 Radiators heated by pulse currents

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CH411320A true CH411320A (en) 1966-04-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412123A (en) * 1980-05-09 1983-10-25 Bell Telephone Laboratories, Incorporated Laminated electric heat generating member for reflow soldering devices
DE3936218A1 (en) * 1989-10-31 1991-05-02 Pkm Kunststoffverarbeitungsmas Welding thermoplastic foils - by contour electrode urging them on a heating element

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010116567A1 (en) * 2009-04-10 2010-10-14 Sakamoto Atsunobu Heater of impulse sealer covered with ceramics
CA2738712A1 (en) * 2008-10-08 2010-04-15 Sidel S.P.A. Labelling machine for sleeve labels
WO2011018806A1 (en) * 2009-08-12 2011-02-17 Sidel S.P.A. Con Socio Unico A labelling machine and a method for applying tubular labels to respective articles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412123A (en) * 1980-05-09 1983-10-25 Bell Telephone Laboratories, Incorporated Laminated electric heat generating member for reflow soldering devices
DE3936218A1 (en) * 1989-10-31 1991-05-02 Pkm Kunststoffverarbeitungsmas Welding thermoplastic foils - by contour electrode urging them on a heating element

Also Published As

Publication number Publication date
DE1296781B (en) 1969-06-04
GB1091917A (en) 1967-11-22

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