• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method for the manufacture of a kitchen utensil suitable for induction heating, comprising: forming a magnetic steel container, and defining at the bottom thereof a stamped window; the placement inside the container, on the bottom thereof, of an aluminum plate, of contour substantially coincident with that of the bottom of the container; heating the steel container and the aluminum plate to a temperature between 325ºC. and 375ºC; the impact fixation of the aluminum plate to the bottom of the utensil by applying a pressing force of between 1500 and 2000 tons, so that the aluminum plate covers the bottom of the steel container internally and fills the entire window stamped on said steel bottom. The invention also includes the obtained utensil. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2708625A1
    申请号:ES201731189
    申请日:2017-10-09
    公开日:2019-04-10
    发明作者:Rius Anton Gavaldà
    申请人:Isogona SL；
    IPC主号:
    专利说明:

    [0001]
    [0002] Method for the manufacture of a kitchen utensil suitable for heating by induction, and kitchen utensil obtained.
    [0003]
    [0004] Object of the invention.
    [0005]
    [0006] The object of the invention is a method for the manufacture of a kitchen utensil suitable for heating induction and kitchen utensil obtained.
    [0007]
    [0008] This invention presents features oriented to obtain a kitchen utensil comprising a magnetic steel container with a base suitable for heating by electromagnetic induction and integrating on the inner face of its base an aluminum plate, diffusing heat.
    [0009]
    [0010] Field of application of the invention.
    [0011]
    [0012] This invention is applicable in the sector dedicated to the manufacture kitchen utensils, such as frying pans, casseroles or the like, suitable for heating for induction.
    [0013]
    [0014] State of the art
    [0015]
    [0016] At present different kitchen utensils are known that present a suitable bottom for their utilization and heating in induction cookers.
    [0017]
    [0018] Specifically known are the tools for induction that present: a container of non-ferromagnetic material, lightweight and good conductor of heat, such as aluminum, and a ferromagnetic plate, usually made of steel, fixed externally on the base of the container and which is what makes possible the heating of the utensil by electromagnetic induction.
    [0019] In the utensils of this type, the ferromagnetic plate is arranged externally, below the bottom of the utensil.
    [0020]
    [0021] To date, various methods have been used for the fixation of ferromagnetic plates of different configurations on the outer surface of the bottom of an aluminum container.
    [0022]
    [0023] The patent ES 2002980 describes a kitchen utensil in the bottom of which are fixed by welding an intermediate heat-dissipating metal plate and an outer shell of ferromagnetic stainless steel.
    [0024]
    [0025] Patent ES 2108284 describes a utensil with a heat-conducting bottom with a metal sheet provided with perforations attached to the outer face of said bottom in the casting operation, using the fluence of the metal to fill said perforations.
    [0026]
    [0027] The patent ES2 135 632 discloses a kitchen utensil with a metal plate provided with openings receiving filling pieces of a ferromagnetic material, the assembly being joined to the bottom of an austenitic steel container by a laser beam welding cord.
    [0028]
    [0029] Patent application DE 3713660 discloses a cooking utensil made of melt-molded aluminum, integrating at least one solid metal part attached to the outside of its bottom in the operation of melt-molding with aluminum.
    [0030]
    [0031] JP-A-2003 102616 discloses a cooking utensil having a main body of an aluminum alloy and a magnetic metal plate attached to the outer surface of the base of the main body. The aluminum base of the main body has a plurality of protuberances inserted through respective through holes defined in a ferromagnetic plate and of a height greater than the thickness of the metal plate, said protuberances making the plate fixation.
    [0032]
    [0033] The patent ES 2297191T3 describes an aluminum cooking utensil which, like that the previous document has a series of protuberances inserted in respective holes of a ferromagnetic plate and riveted thereon.
    [0034]
    [0035] In the patent ES 2 333 396 there is described a method of manufacturing a kitchen utensil suitable for induction cookers comprising: the fixing of a stainless steel disc on the outer surface of the bottom of an aluminum container by heating both pieces and the pressing of them against a previously heated mold, applying a compression force.
    [0036]
    [0037] The utility model ES 1073225 U comprises a first ferromagnetic plate provided with through holes and protrusions for locking it on the bottom of the aluminum utensil and a second ferric plate without holes, fixed on the first ferric plate, and which forms the outer surface of the base of the container.
    [0038]
    [0039] In the aforementioned background the ferromagnetic plate is disposed on the outer surface of the bottom of the kitchen utensil and separated from the interior of the utensil by a more or less thick layer of aluminum forming the bottom of the utensil and acting as a heat diffusing element.
    [0040]
    [0041] Description of the invention
    [0042]
    [0043] This invention presents features aimed at improving the closure of the magnetic field of electromagnetic induction in order to obtain a more efficient kitchen utensil.
    [0044]
    [0045] Another objective of the invention is to ensure that the interior temperature of the utensil is homogeneous, and to eliminate ridges and grooves in the area of union of the ferrous material with aluminum, so that the utensil can be cleaned more easily.
    [0046]
    [0047] To achieve the proposed objectives the method for the manufacture of a kitchen utensil suitable for induction heating comprises:
    [0048] a) the magnetic steel conformation of a container provided with a side wall and a bottom, and the definition in the bottom of said container of a window cut with a predetermined shape,
    [0049] b) the colocation inside the container, on the bottom thereof, of an aluminum plate, of contour substantially coincident with that of the bottom of the container;
    [0050] c) heating the steel container and the aluminum plate to a temperature between 325 ° C. and 375 ° C;
    [0051] d) the impact fixation of the aluminum plate to the bottom of the utensil by the application of a pressing force of between 1500 and 2000 tons, so that the aluminum plate conforms to an inner surface of the bottom of the steel container and a filling of the window cut out at the bottom of said steel container;
    [0052] e) internally cover the bottom of the steel container and fill the entire die-cut window in said steel bottom;
    [0053] f) optionally, the treatment of the surface by shot blasting;
    [0054] g) and the application on the interior surface of the utensil of a layer of non-stick material.
    [0055]
    [0056] The impact fixation of the aluminum plate to the bottom of the steel container, causes the aluminum forming the interior surface of the bottom to completely fill the stamped window of the bottom of the steel container and that said aluminum is stamped against the contour of the window die-cut on the steel bottom; leaving the aluminum plate integrated and fixed permanently in the bottom of the steel utensil, inside the same.
    [0057]
    [0058] The treatment of the surface by shot-peening increases the duration of the non-stick layer to a greater extent.
    [0059]
    [0060] The utensil obtained with the above method comprises: a magnetic steel container having a side wall and a bottom provided with a punched window; and - an aluminum plate mounted on impact on the steel bottom, inside the container, said aluminum plate forming the interior surface of the bottom of the container and a filling of the stamped window, said filling remaining exposed and flush with the bottom of the container on the outside thereof.
    [0061]
    [0062] This utensil presents a surface treatment by shot-firing steel and a layer of non-stick material on the interior surface of the utensil.
    [0063]
    [0064] This container has characteristics that differ substantially from the aforementioned background, since the container itself is made of magnetic steel and a part of the base thereof, of magnetic steel, remains exposed to the outside for heating by electromagnetic induction. The aluminum plate that acts as a heat diffuser completely covers the interior surface of the bottom of the container and fills the die-cut window in the magnetic steel base, promoting a uniform heating of the bottom of the container.
    [0065]
    [0066] Description of the figures.
    [0067]
    [0068] To complement the description that is being made and in order to facilitate the understanding of the characteristics of the invention, a set of drawings in which, with an illustrative and non-limiting character, the following has been represented is attached to the present specification:
    [0069]
    [0070] - Figure 1 shows a top perspective view of an example of realization of the kitchen utensil suitable for induction heating, according to the invention.
    [0071]
    [0072] - Figure 2 shows a bottom perspective view of the kitchen utensil of the previous figure.
    [0073]
    [0074] - Figure 3 shows an elevation view of the kitchen utensil of the previous figures sectioned by a vertical plane
    [0075]
    [0076] - Figure 4 shows an exploded view in lower perspective elevation of the magnetic steel container and aluminum plate, sectioned by a vertical plane, before carrying out its heating and connection by impact.
    [0077]
    [0078] Preferred embodiment of the invention.
    [0079]
    [0080] As can be seen in the embodiment shown the attached figures the kitchen utensil of the invention, represented in this case by a frying pan with handle, comprises: a magnetic steel container (1) having a side wall (11) and a bottom (12) provided with a punched window (13), and an aluminum plate (2) mounted on impact on the bottom (12) of the steel container, inside said container (1): forming said plate aluminum (2) the inner surface (21) of the bottom of the container and a filling (22) of the stamped window (13), said filling (22) being flush with the outer face of the bottom of the container.
    [0081]
    [0082] The fixing of the aluminum plate (2) to the steel bottom (12) of the utensil is made by impact by applying a pressing force comprised between 1500 and 2000 tons, after heating the aluminum plate (2) and the container (1) Magnetic steel at about 350 ° C.
    [0083]
    [0084] The utensil presents a surface treatment by shot-firing steel and a layer of non-stick material (3) on its inner surface.
    [0085]
    [0086] The die-cut window (13) defined on the bottom (12) of the steel container has a star-like configuration, with arms (14) oriented towards the central area of the bottom of the container. Said arms (14) furthermore provide a wide contact surface of the steel bottom (12) with the contour of the aluminum filler (22), provide a heating of the central zone of the bottom of the utensil by effect of the electromagnetic induction and contribute to that the interior surface (21) of aluminum makes a distribution of the heat generated by the entire bottom of the utensil.
    [0087]
    [0088] Having sufficiently described the nature of the invention, as well as an example of a preferred embodiment, it is noted for the appropriate purposes that the materials, shape, size and disposition of the described elements could be modified, provided that this does not imply an alteration of the essential features of the invention that are claimed below.
    权利要求:
    Claims (4)
    [1]
    1. Method for the manufacture of a kitchen utensil suitable for heating by induction; characterized because it comprises:
    a) the magnetic steel conformation of a container (1) provided with a side wall (11) and a bottom (12) and the definition on the bottom (12) of said steel container of a stamped window (13) with a predetermined form,
    b) the colocation inside the container (1), on the bottom (12) thereof, of an aluminum plate (2), contour substantially coincident with that of the bottom of the container;
    c) heating the magnetic steel container (1) and the aluminum plate (2) to a temperature comprised between 325 ° C. and 375 ° C;
    d) fixing by impact of the aluminum plate (2) to the bottom (12) of the steel container (1) by applying a pressing force comprised between 1500 and 2000 tons, so that the aluminum plate (2) ) according to an inner surface (21) of the bottom of the container (1) and a filling (22) of the stamped window (13) in the bottom of said steel container (1);
    e) optionally, the treatment of the surface by shot blasting inside the container;
    f) and finally the application on the interior surface of the utensil of a layer (3) of non-stick material.
    [2]
    2. - Kitchen utensil suitable for induction heating; characterized in that it comprises: a magnetic steel container (1) having a side wall (11) and a bottom (12) provided with a punched window (13); and an aluminum plate (2) mounted on impact on the steel bottom (12), inside the container (1), said aluminum plate (2) forming the inner surface (21) of the bottom of the container and a filling (22) of the stamped window (13), said filler (22) being exposed and flush with the bottom (12) of the steel container (1) per outer face of said bottom (12).
    [3]
    3. Utensil, according to claim 2, characterized in that it comprises on its inner surface a layer of non-stick material (3).
    [4]
    4. Utensil, according to claim 2, characterized in that the stamped window (13) in the bottom (12) of the steel container (1) has a star-like configuration, with arms (14) oriented towards the central area from the bottom of the container.
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    同族专利:
    公开号 | 公开日
    ES2708625B2|2019-12-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    ES2108284T3|1992-07-06|1997-12-16|Seb Sa|CULINARY UTENSIL WITH THERMOCONDUCTOR FUND.|
    US5564590A|1994-04-21|1996-10-15|Kim; Myung-Suk|Cooking vessel having multiple bottom structure and method for production thereof|
    FR2755887A1|1996-11-18|1998-05-22|Seb Sa|Method of making cooking container|
    WO2001087514A1|2000-05-19|2001-11-22|Società Italiana Pentole S.p.A.|Process for the manufacture of cooking vessels and vessel obtained according to such process|
    法律状态:
    2019-04-10| BA2A| Patent application published|Ref document number: 2708625 Country of ref document: ES Kind code of ref document: A1 Effective date: 20190410 |
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201731189A|ES2708625B2|2017-10-09|2017-10-09|METHOD FOR THE MANUFACTURE OF A PROPER KITCHEN UTENSIL FOR INDUCTION HEATING, AND KITCHEN UTENSIL OBTAINED|ES201731189A| ES2708625B2|2017-10-09|2017-10-09|METHOD FOR THE MANUFACTURE OF A PROPER KITCHEN UTENSIL FOR INDUCTION HEATING, AND KITCHEN UTENSIL OBTAINED|
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