WO2016150457A1 - Chambre de cuisson de four pour un four ménager - Google Patents

Chambre de cuisson de four pour un four ménager Download PDF

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Publication number
WO2016150457A1
WO2016150457A1 PCT/EP2015/055907 EP2015055907W WO2016150457A1 WO 2016150457 A1 WO2016150457 A1 WO 2016150457A1 EP 2015055907 W EP2015055907 W EP 2015055907W WO 2016150457 A1 WO2016150457 A1 WO 2016150457A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
sections
enamel layer
muffle
oven
Prior art date
Application number
PCT/EP2015/055907
Other languages
English (en)
Inventor
Marco Böckler
Christian Ehninger
Helmut Hahn
Michael Schock
Richard Wiesinger
Original Assignee
Electrolux Appliances Aktiebolag
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 Electrolux Appliances Aktiebolag filed Critical Electrolux Appliances Aktiebolag
Priority to PCT/EP2015/055907 priority Critical patent/WO2016150457A1/fr
Priority to AU2015387419A priority patent/AU2015387419A1/en
Publication of WO2016150457A1 publication Critical patent/WO2016150457A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/08—Foundations or supports plates; Legs or pillars; Casings; Wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/005—Coatings for ovens

Definitions

  • Oven muffle for a domestic oven The present invention relates to a oven muffle for a domestic oven .
  • Known cooking ovens comprise oven muffles made of metal sheets which are welded together.
  • the muffles usually comprise an enam- el coating for hygienic purposes and for protection against cor ⁇ rosive destruction. Due to the progress in the field of laser technology, besides other established welding technologies, la ⁇ ser welding systems are increasingly used for the generation of the necessary welding connections of the oven muffle.
  • the enamel coating of a conventional oven muffle comprises at least a first or basic layer and at least one second layer of enamel which are applied to the oven muffle and fired.
  • the second layer can comprise a catalytic enamel which can be a porous enamel to catalyze the reduction of soils in the self-cleaning process.
  • an oven muffle being made of at least two muffle parts which are fixedly connected to each other by a welding connection, wherein said welding connection comprises at least one welding seam that has elongated high energized sec ⁇ tions alternating with low energized sections.
  • the inventive embodiment enables the provision of a welding con ⁇ nection that can be easily and reliably enameled.
  • High energized sections shall be understood as sections or regions of the weld ⁇ ing seam that have received a relatively high overall energy or high energy density in the welding process in comparison to the low energized sections which are sections of the welding seam that have received lower overall energy or lower energy density than the high energized sections.
  • the high energized sections may alternate regularly with the low energized sections but also a not regular alternation is possible.
  • said muffle parts are in contact with each other within an overlapping section and said welding connection is arranged within said overlapping sec- tion.
  • the inventive solution can be advantageously applied to an over ⁇ lapping section.
  • the welding seam can be arranged along the com ⁇ plete overlapping section, thus, providing a stable and fix welding connection.
  • said welding seam is produced in a laser welding process.
  • Alternating high energized sections and low energized sections can be pro- pokerd advantageously in a laser welding process.
  • said low energized sec- tions are enlongated low energized sections, in particular in that the low energized sections are substantially as long as said high energized sections. In such an arrangement the stabil ⁇ ity of the welding connection is improved.
  • said low energized sections are welded, in particular in a laser welding process, by receiving a substantially lower energy density than the high energized sections, in particular wherein material in the low energized sections is softened and/or melted.
  • a welding connection which is, as a whole, less thermically influenced than a continuous weld ⁇ ing connection.
  • the low energized sections are receive less en ⁇ ergy, but however, a still stable and reliable welding connec ⁇ tion is produced.
  • said low en ⁇ ergized sections receive no energy in the welding process, in particular such that no material is melted in the in the low en ⁇ ergized sections in the welding process.
  • sections of the welding connection are advantageously min ⁇ imally influenced with a heat load.
  • said high energized sections have a regular length from 5 mm to 150 mm and/or that the low energized sections have a regular length of from 0,5 mm to 8 mm.
  • a welding seam with sections according to said dimensions has a particularly high rigidity and is therefore preferred.
  • said oven muffle has an enamel coating which comprises at least one first enamel layer, in particular a basic enamel layer, and at least one second enamel layer, in particular a catalytic enamel layer.
  • a first layer of a basic enamel is applied to the muffle in order to cover the muffle's welding areas. Sub ⁇ sequently, the basic enamel is melted at a high temperature, e.g. at 800°C.
  • a second layer of a catalytic enamel is applied onto the first layer of enamel.
  • the catalytic enamel is heated again to about the same temperature to form the catalytic enamel layer.
  • the object of the invention is also achieved by a method for manufacturing an oven muffle comprising at least one step of welding at least two muffle parts to form an oven muffle, where ⁇ in a welding tool applies energy to an overlapping section of said muffle parts in such way, that high energized sections and low energized sections are formed alternately in said overlap ⁇ ping section by alternating the energy output of said welding tool and/or alternating the motion speed of said welding tool and/or alternating the distance between welding tool and over- lapping section.
  • an oven muffle is created that can be advantageously enameled in the region of a welding connection.
  • High energized sections and low energized sections can be precisely formed by varying process parameters regularly or not regularly.
  • the fol ⁇ lowing steps are subsequently provided to the at least one weld- ing step:
  • the first layer and/or the second layer emit gas which generates bubbles within the finished enamel coating. It is assumed, that the effect of the bubble generation is dependent on the welding process and the fire steps of the enamel process.
  • the emission of gas can be reduced by the specific welding step, resulting in a reduction of bubbles in or on the final enamel surface.
  • FIG illustrates a view of a top part of an oven muffle embod- ying the present invention
  • FIG illustrates an oven muffle 1 adapted to be installed in a cooking oven or the like and delimiting a cooking chamber of said oven.
  • Conventional oven muffles comprise several metal sheet parts, such as a top part 2 and an intermediate or wrapper part 3 which are welded together to form an oven muffle 1.
  • Fur ⁇ ther parts may be a bottom part or a rear part which also can be welded to a respective part of the oven muffle 1.
  • the oven muf ⁇ fle 1 has a front opening (not shown) which is surrounded by a front flange 4.
  • top part 2 and wrapper part 3 comprise edge sections which overlap each other, forming an overlapping section 5.
  • a welding seam extends from a rear section to a front section of the oven muffle 1.
  • the welding seam 6 is formed as a discontinuous weld ⁇ ing seam. This means that in the welding process in which the welding seam 6 is produced, the energy of the welding tool is varied or alternated. Due to this variation or alternation of the welding energy, the welding seam 6 comprises high energized sections 7 and low energized sections 8.
  • the oven muffle 1 is shown from the exterior, however, the appearance of the welding seam 6 is equal on the interior side.
  • the welding process in this case is a laser welding process.
  • the welding process can be carried out be guiding the la ⁇ ser beam along the overlapping section 5 with a predetermined motion speed, wherein the laser is operated in a pulsed mode.
  • one high energized section 7 is generated and during the pause between two pulses one low ener ⁇ gized section 8 is generated.
  • Oper ⁇ ating with lower power or without power results in a lower ener ⁇ gy density in or on the workpiece in the low energized section 6 compared to a high energized section 7.
  • the oven muffle 1 is coated with enamel in an enamel process.
  • the coating may consist of at least two layers, including a basic layer and at least one second layer applied on the basic layer.
  • at least one second enamel layer may be a catalytic enamel, e.g. offered under the trade name PE PERC CL Black 2C2C XE3211BA by the company FERRO FRANCE .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention concerne une chambre de cuisson de four (1) pour un four ménager composée d'au moins deux parties de chambre de cuisson (2, 3) qui sont fixement raccordées l'une à l'autre par un raccordement par soudage, ledit raccordement par soudage comprenant au moins un cordon de soudure (6) qui présente des sections à haute tension allongées (7) alternant avec des sections à faible tension (8).
PCT/EP2015/055907 2015-03-20 2015-03-20 Chambre de cuisson de four pour un four ménager WO2016150457A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2015/055907 WO2016150457A1 (fr) 2015-03-20 2015-03-20 Chambre de cuisson de four pour un four ménager
AU2015387419A AU2015387419A1 (en) 2015-03-20 2015-03-20 Oven muffle for a domestic oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/055907 WO2016150457A1 (fr) 2015-03-20 2015-03-20 Chambre de cuisson de four pour un four ménager

Publications (1)

Publication Number Publication Date
WO2016150457A1 true WO2016150457A1 (fr) 2016-09-29

Family

ID=52706177

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/055907 WO2016150457A1 (fr) 2015-03-20 2015-03-20 Chambre de cuisson de four pour un four ménager

Country Status (2)

Country Link
AU (1) AU2015387419A1 (fr)
WO (1) WO2016150457A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840344A1 (de) * 1988-11-30 1990-05-31 Bauknecht Hausgeraete Backofengehaeuse
FR2686277A1 (fr) * 1992-01-17 1993-07-23 Moulinex Sa Procede de conformation d'une tole en au moins un diedre dont les deux faces internes recoivent un revetement en email et enceinte de four obtenue par ce procede.
US5905269A (en) * 1997-05-23 1999-05-18 General Electric Company Enhanced infrared energy reflecting composition and method of manufacture
WO2003051570A1 (fr) * 2001-12-19 2003-06-26 Abb Research Ltd. Procede de production d'une soudure au moyen d'un faisceau laser
DE10163183A1 (de) * 2001-12-21 2003-07-03 Bsh Bosch Siemens Hausgeraete Gargerätemuffel sowie Verfahren zur Herstellung einer Gargerätemuffel
EP1655544A2 (fr) * 2004-11-03 2006-05-10 Unox S.p.A. Moufle pour un four de cuisson
DE102010005896A1 (de) * 2010-01-27 2010-10-14 Daimler Ag Laserschweißroboter und -verfahren sowie damit hergestelltes Bauteil
DE102010038360A1 (de) * 2010-07-23 2012-01-26 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur Herstellung einer Blechteilanordnung für ein Haushaltsgerät, insbesondere einen Spülbehälter einer Geschirrspülmaschine, sowie Blechteilanordnung für ein Haushaltsgerät
EP2436986A1 (fr) * 2010-09-30 2012-04-04 Electrolux Home Products Corporation N.V. Moufle de four avec connexion de soudure
DE102013107228B3 (de) * 2013-03-25 2014-04-17 Scansonic Mi Gmbh Verfahren zum stirnseitigen Laserstrahlschweißen von Bördelflanschen
US20140302331A1 (en) * 2010-04-27 2014-10-09 Ferro Corporation Enamel And Ground Coat Compositions

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840344A1 (de) * 1988-11-30 1990-05-31 Bauknecht Hausgeraete Backofengehaeuse
FR2686277A1 (fr) * 1992-01-17 1993-07-23 Moulinex Sa Procede de conformation d'une tole en au moins un diedre dont les deux faces internes recoivent un revetement en email et enceinte de four obtenue par ce procede.
US5905269A (en) * 1997-05-23 1999-05-18 General Electric Company Enhanced infrared energy reflecting composition and method of manufacture
WO2003051570A1 (fr) * 2001-12-19 2003-06-26 Abb Research Ltd. Procede de production d'une soudure au moyen d'un faisceau laser
DE10163183A1 (de) * 2001-12-21 2003-07-03 Bsh Bosch Siemens Hausgeraete Gargerätemuffel sowie Verfahren zur Herstellung einer Gargerätemuffel
EP1655544A2 (fr) * 2004-11-03 2006-05-10 Unox S.p.A. Moufle pour un four de cuisson
DE102010005896A1 (de) * 2010-01-27 2010-10-14 Daimler Ag Laserschweißroboter und -verfahren sowie damit hergestelltes Bauteil
US20140302331A1 (en) * 2010-04-27 2014-10-09 Ferro Corporation Enamel And Ground Coat Compositions
DE102010038360A1 (de) * 2010-07-23 2012-01-26 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur Herstellung einer Blechteilanordnung für ein Haushaltsgerät, insbesondere einen Spülbehälter einer Geschirrspülmaschine, sowie Blechteilanordnung für ein Haushaltsgerät
EP2436986A1 (fr) * 2010-09-30 2012-04-04 Electrolux Home Products Corporation N.V. Moufle de four avec connexion de soudure
DE102013107228B3 (de) * 2013-03-25 2014-04-17 Scansonic Mi Gmbh Verfahren zum stirnseitigen Laserstrahlschweißen von Bördelflanschen

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