EP0379535A1 - Procede pour fabriquer un element chauffant plat, notamment pour systemes de chauffage de sieges auto, et element chauffant plat ainsi obtenu - Google Patents

Procede pour fabriquer un element chauffant plat, notamment pour systemes de chauffage de sieges auto, et element chauffant plat ainsi obtenu

Info

Publication number
EP0379535A1
EP0379535A1 EP19890906360 EP89906360A EP0379535A1 EP 0379535 A1 EP0379535 A1 EP 0379535A1 EP 19890906360 EP19890906360 EP 19890906360 EP 89906360 A EP89906360 A EP 89906360A EP 0379535 A1 EP0379535 A1 EP 0379535A1
Authority
EP
European Patent Office
Prior art keywords
heating conductor
layer
carrier
heating
conductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19890906360
Other languages
German (de)
English (en)
Inventor
Bodo Ruthenberg
Günter LORENZEN
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.)
WET Automotive Systems AG
Original Assignee
WET Automotive Systems AG
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 WET Automotive Systems AG filed Critical WET Automotive Systems AG
Publication of EP0379535A1 publication Critical patent/EP0379535A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/62—Accessories for chairs
    • A47C7/72—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like
    • A47C7/74—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like for ventilation, heating or cooling
    • A47C7/748—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like for ventilation, heating or cooling for 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/004—Heaters using a particular layout for the resistive material or resistive elements using zigzag layout
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/029—Heaters specially adapted for seat warmers

Definitions

  • the invention relates to a method for producing a flat heating element with the features of the preamble of patent claim 1.
  • a heating conductor for example an insulated heating conductor
  • a tool by means of an electronically controlled device, which has pins which protrude from a stripper plate and can be retracted into the latter, around which the heating conductor is guided when it is inserted, that it gets a meandering area-wide course.
  • a carrier on which the heating conductor is to be fixed with such a surface-covering course is either previously speared onto the pins protruding from the stripper plate or subsequently pressed against the tool already carrying the inserted heating conductor, and the heating conductor is fastened to the carrier , whereby, according to known methods, a contact adhesive layer adjacent to the heat conductor-containing layer can be used, which holds the heating conductor turns on the carrier layer.
  • the carrier layer is generally a layered combination of a textile car seat cover material and a foam layer, for example made of polyurethane. It has been shown that the handling of supports, in the form of layered assemblies, the uppermost layer or outermost layer of which is a contact adhesive layer, sometimes leads to difficulties.
  • an important disadvantage of layer dressings suitable for carrying out the known methods mentioned is that the form of attachment of the heating conductors to the carrier layer results in a lack of air permeability, in particular when the layer of the carrier adjacent to the heating conductor layer contains a contact adhesive layer is what is perceived as particularly unpleasant when using the relevant flat heating element in a car seat heater, since in such a case the relevant seat surface or backrest surface is not breathable.
  • the object of the invention is to achieve a method according to the preamble of appended claim 1 in such a way that the individual parts to be used in the production can be handled in a simple manner, the production process is simplified and cheaper, in particular with regard to the use of the to fix the heating
  • REPLACEMENT LEAF means to be used and that the fixing of the heating conductor to the carrier to be provided with it does not influence the breathability of the layered structure.
  • heating conductor is attached to the support in a punctiform manner or only linearly along the heating conductor in the manner of a preliminary fixing of the heating conductor before laminating on at least one further covering layer.
  • a preferred form of provisional fixation of the heating conductor on the carrier or the layer structure forming this carrier consists in connecting the heating conductor to a power source and pressing the heating conductor by means of a press plate, in particular by means of a stripper plate of the aforementioned tool against the carrier, the uppermost one Layer softens thermally and at least partially becomes adhesive in the contact areas with the heating conductor.
  • an air-permeable laminating fleece in particular made of polyamide, which is loosely placed on an underlayer of the carrier as the top layer of the carrier and which, when a heating current is sent through the heating conductor during the manufacturing process, produces a punctiform or line-shaped provisional fixation of the heating conductor on the support in the area of contact of the heating conductor with the laminating fleece and the underlayer.
  • Areas of the laminated nonwoven can be removed with a heated press plate or with a heated roller.
  • FIG. 1 shows a schematic illustration, drawn in vertical section, of a device for carrying out the method proposed here
  • FIG. 1 with a layered structure, each with a different structure, during the process step of temporarily fixing the heating conductor,
  • FIG. 4 shows a detail of a layer bond drawn in vertical section, which according to FIG. FIG. 3 has been produced, in the state in which a fixing plastic grid is applied,
  • FIG. 5 shows a schematic illustration of a detail and in vertical section of a device modified in comparison with FIG. 1 for carrying out the method specified here
  • FIG. 10 shows a section-by-section illustration of a device for thermally laminating a further layer structure onto a layer structure according to FIG. 7 prepared according to the method specified here.
  • FIG. 1 shows a work table 1 with a perforated worktop 3 covering a vacuum chamber 2, on which a two-layer carrier 6 guided over rollers 4 and 5 is placed and fixed by evacuating the chamber 2 by means of a vacuum pump 7.
  • the carrier 6 contains a layer 8 made of a textile car seat cover material and, again with reference to the position shown in FIG. 1, contains a layer of polyurethane foam 9 which is superficially covered by a Polyurette film 10 is covered.
  • a tool Positioned above the work table 1 is a tool, designated in its entirety by 11, which has a guide plate 12 provided with holes, a wiper plate 13 provided with aligned holes, located under the guide plate 12, and one with At the bottom, pins 14 contain occupied pin carrier plate 15, the pins 14 extending in the manner shown in FIG. 1 through the bores of the guide plate 12 and the stripper plate 13 and projecting from the underside of the latter over a certain distance.
  • the drives 16 and 17 shown schematically in FIG. 1 can be used to lower the guide plate 12 and the stripper plate 13 together with the pin support plate 15 resting on the guide plate 12 in the direction of the work table 1.
  • an insulated heating conductor 18 can be inserted into the tool 11 by wrapping the pins 14 protruding from the free surface of the stripper plate 13, so that the heating conductor 18 takes on a zigzag or meandering pattern covering the entire surface .
  • the lower ends of the pins 14 first make contact with the surface of the carrier 6 and soften when the tool is lowered further Tool 11 back into this, so that finally the turns of the heating conductor 14 come into contact with the upper side of the carrier 6.
  • the heating conductor windings are pressed against the polyurethane film 10 of the layer structure forming the carrier 6 and partially stripped from the ends of the pins 14.
  • the stripped ends of the heating conductor 18 are connected to a direct current source or, as shown in FIG. 1, an alternating current source 21 by connecting switch 19 and 20 by closing switch 22.
  • the heating of the heating conductor 18 due to the passage of current leads to sufficient heating of the surface of the heating conductor windings even when the heating conductor is provided with insulation in such a way that the surface of the carrier 6, namely in the exemplary embodiment according to FIG Polyurethane film 10, is melted and the heating conductor windings stick and at least temporarily fixed.
  • the arrangement can be such that the pins 14 are completely withdrawn from the region of the position containing the heating conductor windings by lifting the pin carrier 15 of the tool 11 when the stripper plate 13 has pressed the heating conductor against the carrier 6, after which the heating conductor turns by connection to the electrical
  • FIGS. 2 and 3 show, on an enlarged scale, a section of the stripper plate 13 with the pins 14 of the tool 11 withdrawn behind their working surface (only the stripper plate 13 is shown to simplify the illustration), and the carrier 6 with the textile cover material layer 8, one Polyurethane foam layer 9 and a polyurethane film 10 covering this, which, however, is perforated differently from the illustration in FIG. 1 in order to make the layer structure forming the carrier 6 permeable to air.
  • the perforation of the polyurethane film 10 does not affect the provisional fixation of the heating conductor 18 in the manner described above, such that the layer structure comprising the carrier 6 and the layer containing the heating conductor windings is laminated together with another layer of the foam layer and textile layer, an air-permeable layer , Breathable flat heating element forms, which does not differ from an otherwise appropriately constructed layer structure with regard to elasticity and mechanical strength, in which the layer containing the heating conductor is missing.
  • the layer structure is placed directly in a mold cavity for foaming a vehicle site in a mold, the foam penetrates through the perforations of the polyurethane film 10 and covers the initially temporarily fixed heating conductor turns and connects to the Polyurethane foam layer 9.
  • the exemplary embodiment shown in FIG. 3 differs from that according to FIG. 2 in that the support 6 placed on the work table 1 is formed here only from a textile layer 8 and a foam layer 9. Before the tool 11 is lowered, a laminating fleece made of polyamide is placed on this layer structure. If the tool 11 is now lowered and the method steps described in connection with FIGS. 1 and 2 are carried out, the turns of the heating conductor 18 melt when heated by connection to the power source 21 and the liner fleece is restricted to areas of its course. which is designated by 24 in FIG. 3, on account of a heat flow which emanates from the individual heating conductor windings and which is indicated in FIG. 3 by groups of arrows which each start from the representations of the heating conductor cross sections.
  • the laminating fleece In the areas located between the heating conductor windings, the laminating fleece initially remains unchanged and is also not connected to the underlying foam layer 9 in these areas, while in the areas lying directly below the heating conductor turns, as shown in FIG. 3 melted laminating fleece 24 produces an adhesion mediation between the heating conductor windings and the foam layer 9, which is sufficient at least for a preliminary fixing of the heating conductor windings on the carrier 6.
  • the provisional fixation may be torn open in an impermissible manner, it may be expedient to provide a post-fixation step, which is shown schematically in FIG. 4 and explained below.
  • This post-fixing step is preferably applied to layered bandages as they result from the method steps explained in FIGS. 1 and 2.
  • the layer structure 6 consisting of the layer 8 of the textile cover material and the foam layer 9 is placed on a work table designated by la in FIG. 4, the turns of the heating conductor 18 being already fixed in the manner described on this layer structure by brief heating by means of an electrical power source,
  • a fixing plastic grid of comparatively large mesh size that is to say with a degree of perforation of, for example, 80%, is placed over this arrangement.
  • This fixing plastic grid 25 can be made of polyamide, for example.
  • the fixing plastic grid 25 is laminated onto the carrier 6 with the windings of the heating conductor 18 pre-fixed thereon by means of a heated press plate 26, the fixing plastic grid in the areas of FIG. 4 marked with 27 establishing connection to the carrier 6 and the plastic grid 25 as it were to a thermal fixation seam, which does not influence the breathability of the layer structure produced according to FIG. 5.
  • the fixation of the turns of the The heating conductor 18 can advantageously also be carried out on a carrier by laminating the fixing plastic grid 25 when the heating conductor 18 has not already been pre-fixed on the carrier 6 in the manner explained with reference to FIGS. 1 to 3, but in another way on the carrier 6 Carrier designed and held there for the process step according to Figure 4.
  • FIG. 5 shows a possibility of applying both the layer containing the heating conductor 18 and the fixing plastic grid 25 to the carrier 6 from the layers 8 and 9 by means of a tool 11 modified compared to FIG. 1 before inserting the heating conductor 18 in the tool 11 by means of an automatically controlled device, the fixing plastic grid 25 is placed on the working surface of the stripper plate 13 or, as it were, impaled on the ends of the pins 14. Then, when the tool 11 has been lowered onto the carrier 6, the fixing plastic grid 25 together with the turns of the heating conductor 18 is moved through the heated stripper plate
  • Thermal lamination can also be restricted to areas in which the heating conductor turns initially hold the pins
  • the stripper plate 13 is provided with a heated layer 28 and from there preferred heat conduction paths 29, for example in the form of metal bushings, leading to the working surface of the stripper plate 13 in the area of the passage of the pins 14. provided, which melt the fixing plastic grid 25 in the area around the mouth of the pins 14 and effect the lamination.
  • FIGS. 6 to 9 each show a carrier 6 made of a textile cover material 8 and a foam layer 9 provided with a heating conductor-containing layer, whereby these layer combinations can either be inserted directly into a mold in order to then produce a finished car seat by foaming the mold or but can be laminated together thermally by means of a heated press 32 or by means of a heated roller, not shown in FIG.
  • FIG. 6 shows the layer structure resulting as a result of the process step from FIG. 1 or FIG. 2, the perforation of the covering polyurethane film 10 having to be assumed for the layer structure according to FIG. 2.
  • FIG. 7 shows the layer structure which is the result of the method step according to FIG. 2.
  • FIG. 8 shows a layered composite as it is obtained as a result of the method step according to FIG. 4.
  • FIG. 9 shows a layered structure as can be produced by means of a device according to FIG. 5 if a laminating fleece is inserted into the tool 11 instead of the fixing plastic grid.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Surface Heating Bodies (AREA)

Abstract

Dans le but de faciliter la manipulation des matériaux de support lors de la fabrication d'éléments chauffants électriques plats et d'améliorer la perméabilité aux gaz des assemblages de couches constituant lesdits éléments chauffants, le conducteur chauffant (18) est fixé sur un support (6) en des points isolés ou uniquement en une ligne le long du conducteur chauffant (18) de manière à permettre la fixation provisoire dudit conducteur avant contre-collage d'au moins une nouvelle couche de recouvrement (30). A cet effet, on chauffe brièvement le conducteur chauffant (18) en le raccordant à une source de courant électrique, puis on le colle sur la couche adjacente (6) se ramollissant.
EP19890906360 1988-06-19 1989-05-30 Procede pour fabriquer un element chauffant plat, notamment pour systemes de chauffage de sieges auto, et element chauffant plat ainsi obtenu Withdrawn EP0379535A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883820750 DE3820750A1 (de) 1988-06-19 1988-06-19 Verfahren zur herstellung eines flaechigen heizelementes, insbesondere fuer autositzheizungen, und nach einem derartigen verfahren hergestelltes flaechiges heizelement
DE3820750 1988-06-19

Publications (1)

Publication Number Publication Date
EP0379535A1 true EP0379535A1 (fr) 1990-08-01

Family

ID=6356826

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89201486A Pending EP0347969A1 (fr) 1988-06-19 1989-05-30 Procédé de production d'un élément de chauffage plat, en particulier pour le chauffage de sièges d'autos, et élément plat de chauffage, produit selon ce procédé
EP19890906360 Withdrawn EP0379535A1 (fr) 1988-06-19 1989-05-30 Procede pour fabriquer un element chauffant plat, notamment pour systemes de chauffage de sieges auto, et element chauffant plat ainsi obtenu

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP89201486A Pending EP0347969A1 (fr) 1988-06-19 1989-05-30 Procédé de production d'un élément de chauffage plat, en particulier pour le chauffage de sièges d'autos, et élément plat de chauffage, produit selon ce procédé

Country Status (5)

Country Link
EP (2) EP0347969A1 (fr)
JP (1) JPH03500108A (fr)
KR (1) KR900701203A (fr)
DE (1) DE3820750A1 (fr)
WO (1) WO1989012413A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4228474A1 (de) * 1992-08-27 1994-03-03 Draegerwerk Ag Verfahren zum Einbringen eines Kontaktdrahtes in ein Sensorgehäuse
SE9402508L (sv) * 1994-07-18 1996-01-19 Toecksfors Verkstads Ab Elektrisk uppvärmningsanordning
DE10055141C5 (de) * 2000-11-07 2010-07-22 I.G. Bauerhin Gmbh Elektrotechnische Fabrik Heizleiter
FR2820013B1 (fr) 2001-01-31 2003-04-18 Faurecia Sieges Automobile Coiffe de siege pour vehicule, et siege de vehicule comportant une telle coiffe
FR2820093B1 (fr) 2001-01-31 2003-04-18 Faurecia Sieges Automobile Coiffe de siege pour vehicule, et siege de vehicule comportant une telle coiffe
DE102007051421A1 (de) 2007-10-25 2009-05-07 I.G. Bauerhin Gmbh Heizelement für Fahrzeugsitze oder Lenkräder sowie Verfahren zum Herstellen des Heizelements
US8388056B2 (en) * 2009-05-08 2013-03-05 ReAnna Gayle Smith Heated collapsible article of furniture

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7737010U1 (fr) * 1900-01-01 Kabel- Und Metallwerke Gutehoffnungshuette Ag, 3000 Hannover
DE1103480B (de) * 1957-04-30 1961-03-30 Walther Bethge Verfahren zur Herstellung eines Flaechenheizkoerpers
US4250397A (en) * 1977-06-01 1981-02-10 International Paper Company Heating element and methods of manufacturing therefor
DE2850323A1 (de) * 1978-11-20 1980-05-29 Bauerhin I G Elektro Tech Anordnung eines heizleiters an einem gewebeartigen traeger
GB2061079A (en) * 1979-10-19 1981-05-07 Consultant Laminations Ltd Electrical heating apparatus
GB2070400B (en) * 1980-02-27 1983-07-27 Northern Blankets Ltd Electric heating panels
DE3013778C2 (de) * 1980-04-10 1982-03-11 I.G. Bauerhin GmbH elektro-technische Fabrik, 6466 Gründau Bügelpresse zur Einbindung eines Heizleiters
DE3132188C2 (de) * 1981-08-14 1984-08-23 I.G. Bauerhin GmbH elektro-technische Fabrik, 6466 Gründau Verfahren zur Bildung eines Heizelementes durch einen auf einer Klebefolie verlegten Heizdraht

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8912413A1 *

Also Published As

Publication number Publication date
JPH03500108A (ja) 1991-01-10
DE3820750A1 (de) 1989-12-28
EP0347969A1 (fr) 1989-12-27
KR900701203A (ko) 1990-12-01
WO1989012413A1 (fr) 1989-12-28

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