EP0323348A1 - Procédé pour réaliser une plaque chauffante et article chauffant s'y rapportant - Google Patents

Procédé pour réaliser une plaque chauffante et article chauffant s'y rapportant Download PDF

Info

Publication number
EP0323348A1
EP0323348A1 EP88403335A EP88403335A EP0323348A1 EP 0323348 A1 EP0323348 A1 EP 0323348A1 EP 88403335 A EP88403335 A EP 88403335A EP 88403335 A EP88403335 A EP 88403335A EP 0323348 A1 EP0323348 A1 EP 0323348A1
Authority
EP
European Patent Office
Prior art keywords
plate
heating element
groove
brazing
aluminum
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Withdrawn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
EP88403335A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jean Hennuy
Bernard Louison
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.)
SEB SA
Original Assignee
SEB SA
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 SEB SA filed Critical SEB SA
Publication of EP0323348A1 publication Critical patent/EP0323348A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/24—Arrangements of the heating means within the iron; Arrangements for distributing, conducting or storing the heat
    • 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
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/688—Fabrication of the plates
    • 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
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/72—Plates of sheet metal

Definitions

  • the present invention relates to a method for producing a heating plate in which a tubular heating element is fixed to a metal or metal alloy plate.
  • the invention also relates to heating articles having a flat heating surface, obtained according to the aforementioned method.
  • the invention applies in particular to the production of iron soleplates, in particular steam.
  • the iron soles are most often made of cast aluminum.
  • the heating element of these soles is generally constituted by a metal tube bent substantially in a U, enclosing compacted magnesia which surrounds and electrically insulates an electrical resistance. This tubular heating element is embedded in the aluminum of the sole during the molding of the latter.
  • the heating element is completely embedded in aluminum, the heat exchanges between this element and the soleplate are satisfactory.
  • the surface of the latter intended to be in contact with the articles to be ironed remains substantially flat. This last condition must be rigorously satisfied in the soles of iron as well as in all the heating articles with flat heating surface.
  • tubular heating element is completely embedded in the sole has the consequence that the latter is relatively thick and therefore heavy.
  • the Applicant has attempted to remedy the drawbacks of the aforementioned known embodiments by trying to fix a tubular heating element to a laminated plate (and not molded) using the brazing technique.
  • the temperatures involved during this brazing resulted in a deformation of the surface of the plate. Such deformation is unacceptable in the case in particular of iron soles.
  • the Applicant has also found that the main cause of deformation of the laminated aluminum soles was due to the influence of the repeated contacting of the drops of cold water coming from the water tank intended for the formation of steam, falling at very short intervals on the hot surface of the sole.
  • the object of the present invention is to remedy the drawbacks of the above embodiments by proposing a method which makes it possible to produce a heating plate and in particular an economical iron soleplate, which remains substantially flat and can receive a coating such as an enamel coating.
  • this process for producing a heating plate is characterized in that a metal or laminated metal alloy plate is used, having at least in its central zone a thickness sufficient to make it undeformable under the effect of thermal stresses that it must undergo, this thickness of the central zone forming a shoulder against which the tubular heating element is placed and fixed by brazing.
  • this central zone of sufficient thickness avoids any risk of deformation of the plate under the effect of thermal stresses, in particular those generated by the drop of water drops on a soleplate of steam iron.
  • the cost of producing the heating plate is much more advantageous than in the case of a molded plate completely covering the heating element.
  • such a laminated plate can be covered by an enamel coating or the like.
  • the heating plate according to the invention can be lighter than a molded plate in which the heating element is completely embedded.
  • one uses an aluminum or laminated aluminum alloy plate.
  • Such a plate lends itself very well to cold stamping and brazing operations.
  • a groove is stamped in the plate whose contour and width correspond substantially to the contour and the width of the tubular heating element, the latter is placed in the groove and it is fixed in this by brazing.
  • a groove is made whose depth is between 10 and 90% of the thickness of the laminated plate.
  • This groove preferably has a U-shaped section. This shape is perfectly adapted to receive a tubular aluminum heating element having a flat surface and containing compacted magnesia which surrounds an electrical resistance.
  • a groove bordered on each side by a rib projecting from the surface of the plate is produced during stamping.
  • These ribs projecting from each side of the groove contribute to increasing the depth of the embedding of the heating element in the groove and above all allow to increase the rigidity of the plate and its resistance to deformation during the operation. soldering.
  • a brazing alloy based on aluminum alloy is placed at the bottom of the groove, the tubular heating element is then placed on this brazing and the assembly is brought to a temperature between 500 and 640 ° C to melt the solder.
  • an aluminum plate comprising on one of its faces an aluminum-based brazing sheet laminated with this plate, the groove is cold stamped on the face of the plate covered by the colamine-coated solder sheet, place the heating element in the groove and carry the assembly at a temperature between 500 and 640 ° C to melt the solder.
  • the plate is formed by stamping under conditions such that a zone of thickness greater than that of the initial plate is created in its central part and connected to the peripheral part by a shoulder against which the tubular heating element is fixed by brazing.
  • This stamping mode thus simultaneously makes it possible to produce a reinforced central zone which makes the plate non-deformable with respect to thermal stresses and to produce a shoulder which makes it possible to obtain an excellent heat exchange between the resistance and the plate.
  • the central part of a plate of substantially constant thickness is reinforced by a second plate whose peripheral edge forms a shoulder with the first plate and the tubular heating element is fixed by brazing against the shoulder of the second plate.
  • this second added plate makes it possible to reinforce the central zone of the first plate and to produce the shoulder for fixing the heating resistance.
  • the method according to the invention preferably applies, but is not limited to, the production of an iron soleplate.
  • Figures 1 to 4 illustrate a first version of the method for producing a heating soleplate for an iron, in which a tubular heating element 1 is fixed to a plate 2 of metal or metal alloy, such as an aluminum-based alloy .
  • a plate 2 made of metal or a rolled metal alloy is used and a groove 3 is cold stamped in this plate 2, the outline and width of which correspond substantially to the outline and width of the tubular heating element 1.
  • This stamping can be carried out cold or hot in a manner known per se, using for example a hydraulic press and a matrix having the profile desired of the groove that we want to make.
  • the heating element 1 is placed in the latter and it is fixed in the latter brazing, as will be seen in more detail below.
  • a groove 3 is made, the depth of which is between 10 and 90% of the thickness of the laminated plate 2.
  • the groove 3 has a U-shaped section adapted to that of the tubular heating element 1. This has a flat 1a intended to come to rest at the bottom of the groove 3 , and contains compacted magnesia 1b which surrounds an electrical resistance 1c.
  • a groove 3 is produced during stamping, bordered on each side by a rib 4 projecting from the surface 5 of the plate. These ribs 4 are formed by creep of the aluminum on each side of the stamped groove 3.
  • a brazing 6 based on aluminum alloy is placed at the bottom of the groove 3. After placing the tubular heating element 1 on this solder 6, the assembly is brought to a temperature of between 500 and 640 ° C. to melt the solder.
  • solder 6 fills all the space between the heating element 1 and the groove 3, as shown in Figure 4. In addition, this solder 6 partially rises by capillary action on the upper surface of the heating element 1, so that the latter is firmly connected and in intimate contact with the soleplate 2.
  • This flux can be of the corrosive or non-corrosive type.
  • cryolite Na5AlF6
  • the flux can be applied by coating, soaking or spraying as a solution or suspension.
  • the solder used must of course be made of an alloy whose melting point is lower than that of the soleplate and of the heating element.
  • the soleplate 2 is made of aluminum containing a small proportion of Si, Fe, Cu and other metals
  • an aluminum brazing containing a few percent of Si and whose melting point is between 550 and 620 ° C. will be used.
  • an aluminum plate 7 which has on one of its faces a sheet 8 of aluminum-based brazing co-laminated with this plate.
  • the groove 9 is cold stamped on the face of the plate 7 covered by the sheet 8 of colaminated solder, the heating element 1 is placed in the groove and the assembly is brought to a temperature of between 500 and 600 ° C. for melt the solder 8.
  • the cover 10 can be constituted, like the sole 7, by an aluminum sheet colaminated with a sheet 11 of aluminum-based brazing. This cover 10 can be linked at the same time to the upper part of the heating element 1, as shown in FIG. 6.
  • a laminated aluminum plate with a thickness of 4 mm is used, covered with a sheet of solder co-laminated with the plate.
  • the aluminum of the plate contains 0.6% of Si, 0.7% of Fe, 0.05 to 0.20% of Cu, 1 to 1.5% of Mn and 0.1% of Zn.
  • the melting temperature of this alloy is equal to 643 ° C.
  • the thickness of the solder sheet collaminated with this plate is equal to 0.4 mm.
  • the aluminum-based alloy of this sheet contains 6.8 to 8.2% Si, 0.8% Fe, 0.25% Cu, 0.10% Mn and 0.2% zn .
  • the melting temperature of this alloy is between 577 and 617 ° C.
  • a deep groove equal to 2 mm is cold stamped using a hydraulic press.
  • the pressure used is between 650 and 700 tonnes.
  • the shape of the die is adapted so that the stamping forms on the edges of the groove ribs of thickness equal to approximately 2 mm.
  • the stamped sole is soaked in a flux bath (chloride or fluoride of alkali or alkaline earth metal).
  • a cover made from a stamped aluminum sheet, which optionally may include a sheet of colamine-coated solder. This tubular heating element and this cover were treated by a flow like the sole.
  • the heating element has a large heat exchange surface with the soleplate.
  • this groove makes it possible to avoid any deformation of the sole due to the temperatures involved during brazing, despite the differences in expansion coefficients between the sole and the heating element.
  • the method according to the invention makes it possible to simultaneously fix (that is to say in a single brazing operation) the heating element and the cover to the soleplate by ensuring a sealed connection between the soleplate and the cover, which makes the process even more economical.
  • the plate 20 is formed from laminated aluminum, by stamping under conditions such that a zone of thickness greater than that of the initial plate shown is created in its central part 20a. in Figure 9.
  • This central portion in excess thickness 20a is connected to the peripheral portion 20b by a shoulder 21 against which the tubular heating element 1 is fixed by brazing, as explained above.
  • the fixing of a cover 22 is carried out by brazing at the same time as that of the heating element 1.
  • FIG. 9 shows the stamping punch 23 which is used for stamping the plate 20.
  • the latter is embedded in a die 24.
  • the punch 23 has a central cavity 25 complementary to the additional thickness that is desired make on the plate 20, bordered by a relief 26 corresponding to the location of the heating element 1.
  • the punch 23 is pressed on the plate 24 under sufficient pressure to cause the material to flow from the periphery towards the central part.
  • the central zone 20a is further reinforced by the addition of a plate 27 in intimate contact with the plate 20 and the peripheral edge 27a of which is located in line with the shoulder 21 formed in the plate underlying 20.
  • This plate 27 thus has the effect of increasing the height of the shoulder 21 against which the heating element 1 is fixed, which improves the heat exchange conditions between the latter and the plate 20.
  • the maximum thickness of the first plate 20 can be less than that of the plate 20 shown in FIG. 7.
  • This second plate 27 can comprise a colaminated brazing sheet which makes it possible to fix this plate by brazing on the first plate 20.
  • the plate 28 has a substantially constant thickness.
  • a second plate 29 has been added, the peripheral edge 29a of which constitutes the shoulder against which the heating element 1 is fixed by brazing.
  • This second plate 29 has the effect of increasing the thickness of the metal in the central part of the soleplate, which allows it to withstand the thermal stresses generated by the impact of drops of cold water.
  • the plates 28, 29 can both have a thickness of the order of 4 mm when they are made of laminated aluminum.
  • the plate 29 could possibly be made of a metal other than aluminum and thus have a coefficient of thermal expansion slightly different from that of the plate 28 to compensate by bimetallic strip effect for the deformations induced in the plate 28.
  • FIG. 11 brings two improvements compared to that of FIG. 10.
  • the folded edge at 90 ° 30a of the plate 30 applied to the plate 28 forms a peripheral beam which allows this plate 30 to resist even more the deformations.
  • this folded edge 30a forms a shoulder of greater height for the heating element 1, which makes it possible to improve the thermal contact between this element and the underlying plate 28.
  • the folded edge 30a of the plate 30 serves to support the cover 22 and makes it possible to increase the height of the vaporization chamber located between the plate 30 and this cover 22.
  • the invention can also be applied to the production of heating articles having a flat surface, other than iron soles.
  • the heating element instead of enclosing an electrical resistance can consist of a tube in which circulates a heat transfer fluid such as hot water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Surface Heating Bodies (AREA)
  • Resistance Heating (AREA)
  • Irons (AREA)
EP88403335A 1987-12-30 1988-12-27 Procédé pour réaliser une plaque chauffante et article chauffant s'y rapportant Withdrawn EP0323348A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8718379A FR2625641B1 (fr) 1987-12-30 1987-12-30 Procede pour realiser une plaque chauffante et article chauffant s'y rapportant
FR8718379 1987-12-30

Publications (1)

Publication Number Publication Date
EP0323348A1 true EP0323348A1 (fr) 1989-07-05

Family

ID=9358450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88403335A Withdrawn EP0323348A1 (fr) 1987-12-30 1988-12-27 Procédé pour réaliser une plaque chauffante et article chauffant s'y rapportant

Country Status (4)

Country Link
US (1) US4913338A (ja)
EP (1) EP0323348A1 (ja)
JP (1) JPH01195687A (ja)
FR (1) FR2625641B1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3068188A1 (fr) 2015-03-11 2016-09-14 Hubert Delelis Fanien Procédé d'assemblage d'élément chauffant de type plaque et articles chauffants s'y rapportant

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4065639B2 (ja) * 2000-02-01 2008-03-26 株式会社アルバック パネルヒータ
MY187666A (en) * 2007-12-21 2021-10-08 Song Seok Ju Fuel heating equipment of diesel engine
US20100257761A1 (en) * 2009-04-08 2010-10-14 Lung Wai Choi Electric iron with a synchronizing temperature display
GB2498407B (en) * 2012-02-07 2014-04-16 Richards Morphy N I Ltd Electric hand iron and transparent soleplate assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2361874A (en) * 1941-04-03 1944-10-31 Westinghouse Electric & Mfg Co Heater unit construction
GB635233A (en) * 1947-01-27 1950-04-05 Pyrotenax Ltd Improvements in or relating to electrical heaters
DE2151860A1 (de) * 1970-10-28 1972-05-10 Soernewitz Elektrowaerme Veb Befestigung des Rohrheizkoerpers auf der Grundplatte von Buegeleisen
US4045653A (en) * 1976-06-28 1977-08-30 National Presto Industries, Inc. Electric cooker with press-staked heating element and method of making the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979631A (en) * 1933-10-28 1934-11-06 Dover Mfg Company Flatiron
US3275801A (en) * 1964-06-17 1966-09-27 Walter A Churchill Electrical heat exchanger
JPS6017798B2 (ja) * 1979-06-29 1985-05-07 信越化学工業株式会社 有機けい素化合物
JPS5882489A (ja) * 1981-11-12 1983-05-18 松下電器産業株式会社 調理器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2361874A (en) * 1941-04-03 1944-10-31 Westinghouse Electric & Mfg Co Heater unit construction
GB635233A (en) * 1947-01-27 1950-04-05 Pyrotenax Ltd Improvements in or relating to electrical heaters
DE2151860A1 (de) * 1970-10-28 1972-05-10 Soernewitz Elektrowaerme Veb Befestigung des Rohrheizkoerpers auf der Grundplatte von Buegeleisen
US4045653A (en) * 1976-06-28 1977-08-30 National Presto Industries, Inc. Electric cooker with press-staked heating element and method of making the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3068188A1 (fr) 2015-03-11 2016-09-14 Hubert Delelis Fanien Procédé d'assemblage d'élément chauffant de type plaque et articles chauffants s'y rapportant

Also Published As

Publication number Publication date
JPH01195687A (ja) 1989-08-07
FR2625641A1 (fr) 1989-07-07
US4913338A (en) 1990-04-03
FR2625641B1 (fr) 1990-06-01

Similar Documents

Publication Publication Date Title
EP0509860B1 (fr) Article constitué à partir d'une plaque réalisée en un métal relativement mou et récipient culinaire constituant un tel article
EP0648459B1 (fr) Récipient de cuisson à déformation de fond maitrisée
FR2486148A1 (fr) Isolant composite pour des composants de moteurs et procede pour sa fabrication
EP0682724B1 (fr) Semelle de fer a repasser multicouches en materiaux colamines
EP0668040B1 (fr) Récipient culinaire à fond renforcé et son procédé de fabrication
EP0323348A1 (fr) Procédé pour réaliser une plaque chauffante et article chauffant s'y rapportant
FR2852219A1 (fr) Dispositif de cuisson dont l'embase comprend une piece ornementale et procede de fabrication correspondant
EP0807367B1 (fr) Element chauffant avec plaque diffusante et procede d'assemblage dudit ensemble
FR2648166A1 (fr) Semelle de fer a repasser a plaque rapportee et fer a repasser comportant une telle semelle
EP0895828A1 (fr) Dispositif de fixation de pièces d'un appareil électroménager
FR2741553A1 (fr) Procede de fabrication d'un recipient de cuisson et recipient obtenu
EP0713937B1 (fr) Fer à repasser comportant une semelle améliorée
FR2705374A1 (fr) Semelle pour un fer à repasser électrique.
FR2735708A1 (fr) Procede de fabrication d'un recipient de cuisson a double paroi par frappe a chaud et recipient fabrique selon ce procede
WO2006040476A1 (fr) Element chauffant, notamment destine aux bouilloires
EP0874933B1 (fr) Semelle de fer a repasser
FR2628283A1 (fr) Composant chauffant plat a element chauffant electriquement resistant et son procede de fabrication
FR2551424A1 (fr) Reservoir ferme, notamment d'un chauffe-eau a protection interne, et procede pour la realisation de cette protection
FR2560798A1 (fr) Procede d'assemblage de feuilles metalliques et articles ainsi obtenus
FR2755887A1 (fr) Procede de fabrication d'un recipient de cuisson et recipient ainsi obtenu
FR2711050A1 (fr) Récipient à cuisson à fond indéformable.
BE461394A (ja)
FR2730120A1 (fr) Element chauffant avec plaque diffusante
FR2730119A1 (fr) Ensemble chauffant electrique
BE406496A (ja)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19881230

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17Q First examination report despatched

Effective date: 19911107

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19940816