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DE1296781B - Radiator heated by impulse currents - Google Patents

Radiator heated by impulse currents

Info

Publication number
DE1296781B
DE1296781B DESCH36088A DESC036088A DE1296781B DE 1296781 B DE1296781 B DE 1296781B DE SCH36088 A DESCH36088 A DE SCH36088A DE SC036088 A DESC036088 A DE SC036088A DE 1296781 B DE1296781 B DE 1296781B
Authority
DE
Germany
Prior art keywords
heating tape
carrier body
heat
welding
radiator
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.)
Pending
Application number
DESCH36088A
Other languages
German (de)
Other versions
DE1903004U (en
Inventor
Hirzel
Dipl-Ing Hans Neuhausen
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.)
Schweizerische Industrie Gesellschaft
Original Assignee
Schweizerische Industrie Gesellschaft
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 Schweizerische Industrie Gesellschaft filed Critical Schweizerische Industrie Gesellschaft
Publication of DE1296781B publication Critical patent/DE1296781B/en
Pending 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
    • B29C65/18—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

Die Erfindung betrifft einen durch Impulsströme beheizten Heizkörper zum Verschweißen von elektrisch nichtleitenden, heißsiegelfähigen Folien mit einem Heizbändchen, welches auf einen thermisch gut leitenden Trägerkörper gespannt ist, wobei das Heizbändchen im Vergleich zum Trägerkörper eine sehr kleine Masse aufweist, um eine rasche Wärmeableitung der im Heizbändchen durch den Stromimpuls erzeugten Wärme zu erzielen. The invention relates to a radiator heated by pulsed currents for welding electrically non-conductive, heat-sealable foils with a Heating tape, which is stretched on a thermally highly conductive carrier body, wherein the heating tape has a very small mass compared to the carrier body, a rapid dissipation of heat generated in the heating tape by the current pulse To achieve warmth.

Beim Impulsschweißen soll die dem Heizelement nur im Moment des Schweißvorganges impulsweise zugeführte Energie möglichst weitgehend auf die zu verschweißende Folie übertragen werden. Das mit dieser in Berührung stehende Heizbändchen soll sich wieder unter die Schweißtemperatur abkühlen, bevor es von der Schweißnaht abgehoben wird. In the case of pulse welding, the heating element should only be activated at the moment of the welding process Pulsed energy supplied as much as possible to the film to be welded be transmitted. The heating tape that is in contact with it should be restored cool below the welding temperature before it is lifted off the weld seam.

Für das Impulsschweißen von Kunststoffolien sind bereits Heizkörper bekannt, bei denen zwischen dem stromdurchflossenen Heizbändchen und dem Trägerkörper eine Einlage aus wärmeisolierendem Material, z. B. Polytetrafluoräthylen, Silikongummi oder Keramik angeordnet ist. Diese Maßnahme ist zweckmäßig für den Wärmehaushalt. Sie vermindert die Wärmeabgabe an den Trägerkörper und senkt dadurch den Stromverbrauch der Schweißvorrichtung. Infolge der geringeren Wärmeabgabe an den Trägerkörper dauert es jedoch jeweils etwas länger, bis das Heizbändchen wieder unter die Schweißtemperatur abgekühlt ist und der Heizkörper von der Folie abgehoben werden kann. Im praktischen Betrieb ist im Interesse der Produktionssteigerung die Erhöhung der Arbeitstakte pro Zeiteinheit viel wichtiger als der Stromverbrauch. There are already radiators for the pulse welding of plastic foils known, where between the current-carrying heating tape and the carrier body an insert made of heat insulating material, e.g. B. polytetrafluoroethylene, silicone rubber or ceramic is arranged. This measure is useful for the heat balance. It reduces the heat dissipation to the carrier body and thereby lowers power consumption the welding device. As a result of the lower heat dissipation to the carrier body lasts however, it takes a little longer until the heating tape is below the welding temperature again has cooled down and the radiator can be lifted off the foil. In the practical In the interest of increasing production, operation is to increase work cycles per unit of time is much more important than power consumption.

Es ist deshalb zweckmäßiger, die nicht auf die Schweißnaht übertragene Wärme so rasch wie möglich in den Trägerkörper abzuleiten.It is therefore more appropriate to use the one that is not transferred to the weld seam Dissipate heat as quickly as possible into the carrier body.

Die Erfindung bezweckt, die Leistungsfähigkeit von Impulsheizkörpern zu steigern, also eine raschere Folge von Arbeitstakten bei einwandfreier Qualität der Schweißnähte zu ermöglichen. The invention aims to improve the performance of pulse heaters to increase, i.e. a faster sequence of work cycles with impeccable quality of the weld seams.

Erfindungsgemäß trägt der Trägerkörper an der Fläche, die mit dem Heizbändchen in Berührung kommt, eine elektrisch isolierende Metalloxydschicht, die vorzugsweise durch anodische Oxydation erzeugt ist. Die Metalloxydschicht hat den Vorteil, daß sie zwar elektrisch isolierend wirkt, aber die Wärme gut leitet, so daß die nicht auf die erzeugte Schweißnaht übertragene Wärme sehr rasch in den Trägerkörper abfließen kann. According to the invention carries the carrier body on the surface with the Heating tape comes into contact, an electrically insulating metal oxide layer, which is preferably produced by anodic oxidation. The metal oxide layer has the advantage that it has an electrically insulating effect, but conducts heat well, so that the heat not transferred to the weld seam produced very quickly in the Carrier body can flow off.

Einzelheiten der Erfindung werden an Hand der Zeichnung, die Ausführungsbeispiele des Erfindungsgegenstandes darstellt, im folgenden näher erläutert. Es zeigt F i g. 1 einen Abschnitt eines erfindungsgemäßen Heizkörpers und F i g. 2 und 3 je ein Teilstück des Heizkörpers in größerem Maßstab mit verschiedenartigen Ausnehmungen im das Heizbändchen stützenden Teil des Trägerkörpers. Details of the invention are based on the drawing, the exemplary embodiments of the subject matter of the invention, explained in more detail below. It shows F i G. 1 shows a section of a radiator according to the invention and FIG. 2 and 3 each one Part of the radiator on a larger scale with various recesses in the part of the carrier body supporting the heating tape.

Der Heizkörper umfaßt einen thermisch gut leitenden metallischen Trägerkörper 1, der einen Kopf 2 von kleinerer Breite aufweist, dessen obere Fläche 2 a leicht gewölbt ausgebildet ist. Über der Fläche 2 a 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. Andererseits soll ein möglichst guter Wärmeabfluß vom Heizbändchen 3 auf den Trägerkörper 1 gewährleistet sein, damit das Heizbändchen, nachdem es durch einen Stromimpuls erhitzt wurde und die Schweißung durchgeführt ist, möglichst rasch wieder abkühlt. Dies wird dadurch erreicht, daß auf dem Trägerkörper 1 an der Fläche 2 a, die mit dem Heizbändchen 3 in Berührung kommt, eine elektrisch isolierende Metalloxydschicht, z. B. Aluminiumoxyd, aufgebracht, z. B. aufgespritzt wird. Wenn der Trägerkörper 1 aus einer Aluminiumlegierung hergestellt ist, wird die elektrisch isolierende Aluminiumoxydschicht mit Vorteil durch anodische Oxydation erzeugt. The heating element comprises a metallic one with good thermal conductivity Support body 1, which has a head 2 of smaller width, the upper surface of which 2 a is slightly curved. A thin heating tape is located over the surface 2a 3, which is clamped by two strips 5 fastened by means of screws 4. That Heating tape 3 is traversed in the longitudinal direction by current pulses, which are carried by leads 6 are fed. 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, a good heat flow from the heating tape 3 to the support body 1 can be guaranteed, so that the heating tape after it has been heated by a current pulse and the Welding has been carried out, cools down again as quickly as possible. This is achieved by that on the support body 1 on the surface 2 a, which is in contact with the heating tape 3 comes, an electrically insulating metal oxide layer, e.g. B. aluminum oxide, applied, z. B. is sprayed on. When the support body 1 is made of an aluminum alloy is, the electrically insulating aluminum oxide layer is advantageously anodic Oxidation generated.

Wie die F i g. 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 erstrecken können. Das Heizbändchen 3 erhitzt sich dann an diesen Stellen, an denen kein direkter Wärmeabfluß in den Trägerkörper 1 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. As the F i g. 2 and 3 show can be on the surface of the head 2 recesses 7 and 8 can be arranged, which extend over the entire length or only can extend over a certain section of the head 2. The heating tape 3 then heats up at those points where there is no direct heat flow into the carrier body 1 takes place, faster and higher. Let it - be that way within the Welding zone achieve linear strips with a particularly good bond and thus achieve high quality, really tight seams.

Um zu verhindern, daß der Trägerkörper 1 sich zu stark erwärmt, kann er -mit- Hohlräumen, z. B. In order to prevent the carrier body 1 from heating up too much, can er -with- cavities, e.g. B.

Längsbohrungen 9 (F i g. 1), ausgerüstet werden, durch die Kühlwasser oder Druckluft geleitet wird.Longitudinal bores 9 (Fig. 1), are equipped, through the cooling water or compressed air is directed.

Claims (3)

Patentansprüche: 1. Durch Impulsströme beheizter Heizkörper zum Verschweißen von elektrisch nichtleitenden, heißsiegelfähigen Folien mit einem Heizbändchen, welches auf einen thermisch gut leitenden Trägerkörper gespannt ist, wobei das Heizbändchen im Vergleich zum Trägerkörper eine sehr kleine Masse aufweist, um eine rasche Wärmeableitung der im Heizbändchen durch den Stromimpuls erzeugten Wärme zu erzielen, dadurch gekennzeichnet, daß der Trägerkörper (1) an der Fläche (2 a), die mit dem Heizbändchen (3) in Berührung kommt, eine elektrisch isolierende Metalloxydschicht trägt, die vorzugsweise durch anodische Oxydation erzeugt ist. Claims: 1. Radiators heated by pulse currents for welding of electrically non-conductive, heat-sealable foils with a heating tape, which is stretched on a thermally highly conductive support body, the heating tape Compared to the carrier body, it has a very small mass in order to dissipate heat quickly to achieve the heat generated in the heating tape by the current pulse, characterized in that that the carrier body (1) on the surface (2a) which is in contact with the heating tape (3) comes, carries an electrically insulating metal oxide layer, which is preferably through anodic oxidation is generated. 2. Heizkörper nach Anspruch 1, dadurch gekennzeichnet, daß der Trägerkörper (1) im Bereich der beim Schweißen wirksamen Oberfläche des Heizbändchens Ausnehmungen (7, 8) aufweist. 2. Heater according to claim 1, characterized in that the carrier body (1) Recesses in the area of the surface of the heating tape that is effective during welding (7, 8). 3. Heizkörper nach Anspruch 1, dadurch gekennzeichnet, daß der Trägerkörper (1) für den kontinuierlichen Durchfluß eines Kühlmittels bestimmte Hohlräume (9) aufweist. 3. Radiator according to claim 1, characterized in that the carrier body (1) cavities intended for the continuous flow of a coolant (9) having.
DESCH36088A 1963-11-12 1964-11-11 Radiator heated by impulse currents Pending DE1296781B (en)

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CH1382963A CH411320A (en) 1963-11-12 1963-11-12 Radiators heated by pulse currents

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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
DE3936218C2 (en) * 1989-10-31 1994-06-23 Pkm Kunststoffverarbeitungsmas Method and device for welding and / or separating welding thermoplastic plastic films
WO2010116567A1 (en) * 2009-04-10 2010-10-14 Sakamoto Atsunobu Heater of impulse sealer covered with ceramics
WO2010040397A1 (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

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GB1091917A (en) 1967-11-22

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