Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
  • B32B15/012—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
  • A47J36/00—Parts, details or accessories of cooking-vessels
  • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
  • B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
  • B32B15/015—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium the said other metal being copper or nickel or an alloy thereof
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/12—All metal or with adjacent metals
  • Y10T428/12222—Shaped configuration for melting [e.g., package, etc.]

Definitions

• Multilayer, plate-shaped composite material for the production of induction cooker suitable cookware by forming
• the invention relates to a multilayer, plate-shaped composite material for the production of cookware suitable for domestic cooking by forming, a blank made of the composite material, a cooking utensil Roh ⁇ made ling or produced from the composite material or the Ronde and cookware or made of the composite material, blank or cookware blank according to the preambles of the independent claims.
• the composite material from which the Ronde is a core of aluminum or copper and at least an outer layer of ferritic stainless steel, which forms the deep-drawn of the blank, the outside of the blank thus produced cooking utensil blank and when cooking on the induction hearth of Generation of cooking heat is used.
• this outer layer has the disadvantage that the application of a coating, for example a non-stick coating made of Teflon, is technically difficult and cost-intensive, so that the design possibilities regarding the outer surface of the cookware are limited and this cookware is virtually completely finally made with stainless steel outer surfaces.
• a coating for example a non-stick coating made of Teflon
• This object is achieved by the multilayer, plate-shaped composite material, the round blank, the cooking utensil blank and the cookware according to the independent claims.
• a first aspect of the invention relates to a plate-shaped composite material consisting of several metal layers which has such a deep-drawing capability that round blanks, ie circular or oval plates, are made of this composite material without destruction of individual layers by forming, for example deep - Draw, ironing or compression molding, in induction cooker suitable cookware blanks mit- with a bottom portion and a wall portion surrounding this bottom area can be transformed.
• the composite material has two metallic outer layers and at least one metallic core layer arranged between the outer layers, wherein at least one of the two outer layers, the first outer layer according to the claims, is formed from aluminum or an aluminum alloy and which adjoins these first outer layer adjacent to the core layer, the claim-compliant first Kern ⁇ layer is formed of a ferromagneti Service metal or a ferromagnetic metal alloy.
• the composite material constructed in this way can be provided on the outer layer consisting of aluminum or an aluminum alloy in a process-technically simple and cost-effective manner with a coating, for example made of Teflon, a decorative coating or a hard ionization, which is preferably done before the forming, for example by deep drawing, for example, after punching the blank from a composite sheet.
• a coating for example made of Teflon, a decorative coating or a hard ionization, which is preferably done before the forming, for example by deep drawing, for example, after punching the blank from a composite sheet.
• the second outer layer according to the claims is made of a ferritic or austenitic stainless steel.
• the claimed first outer layer made of aluminum or an aluminum alloy has a thickness of less than 100 .mu.m, preferably less than 40 .mu.m, and more preferably less than 20 .mu.m, so that as little shielding as possible is required first core layer of ferromagnetic material relative to the Indu Wegsfeld generated by the induction induction field results.
• both outer sides can be provided with a coating in a simple and cost-effective manner. It is preferred if both outer layers are identical in terms of material and / or layer thickness, since this can reduce the bimetallic effect and thus the tendency of the bottom of a cookware produced from this composite material to distort.
• the claimed first core layer which directly adjoins the first metallic outer layer according to the invention, is preferably made of a stainless steel alloy, of a non-stainless steel alloy or of nickel or a nickel alloy, the first mentioned and the last-named variant
• the advantage is that a subsequent exposure of this first core layer in the bottom region of a cookware blank produced from this composite material in order to improve the induction field penetration, for example, by removing the first outer layer according to the invention by chemical methods, eg etching, or mechanical, in particular machining, for example, dressing, is possible, without subsequently resulting in corrosion problems.
• the composite has, adjacent to the demanding first core layer, at least one second core layer which has a higher thermal conductivity than the first core layer and is preferably made of copper or aluminum or an alloy of one of these metals. This makes it possible to provide a composite material which assists a uniform heat distribution. It is preferred if between the first core layer and the second outer layer, a further core layer is arranged, which has a higher strength than the second core layer and in particular special, that this further core layer of titanium, stainless steel or steel. This results in a composite material with very high mechanical strength.
• Core layer and the second outer layer a composite of a plurality of further core layers of different alloys of the same metal arranged, and preferably of different aluminum alloys or of pure aluminum and aluminum alloys.
• the composite of further core layers has an odd number of layers, for example three-, five-, seven- or nine-layered, and moreover, in addition, starting from a middle layer, a symmetrical layering construction with respect to alloy material and / or layer thickness, since this results in the most uniform possible structure, which causes virtually no bimetal effect on heating.
• the composite material has two preferably identical composites of a plurality of further core layers made of different alloys of the same metal, preferably of different aluminum alloys or of pure aluminum and aluminum alloys, and between them another core layer of another metal or one of them Alloy of another metal, so can achieve optimum properties in terms of thermoforming behavior, strength and thermal conductivity of the composite.
• the composite starting from a middle core layer, has a symmetrical or mirror-like structure with respect to the material layers and / or layer thicknesses, so that virtually no bimetallic effect results on heating and cooling and warping Soils of cooking utensils formed from this composite material is largely avoided during cooking.
• the middle core layer preferably has a higher strength than a core layer adjacent to it and is formed, in particular, of steel, stainless steel or titanium or an alloy thereof, since this can significantly improve the mechanical strength.
• the composite material has a coating, for example made of Teflon, on the required first outer layer or on both outer layers, which facilitates deep-drawing and subsequent coating of a cookware produced from this composite material. Blanks can be omitted.
• a second aspect of the invention relates to a blank of the composite material according to the first aspect of the invention, from which cookware blanks according to the invention can be produced by deep-drawing.
• the blank may be provided on one or both sides with a coating, for example a non-stick coating made of Teflon, wherein the coating may also have been applied only after the blank has been punched out of a composite material plate according to the invention.
• a coating for example a non-stick coating made of Teflon, wherein the coating may also have been applied only after the blank has been punched out of a composite material plate according to the invention.
• Such blanks can be automatically coated and deep-drawn in today's industrial large-scale plants for the production of coated aluminum cookware, so that relatively low production costs and flexible production result.
• a third aspect of the invention relates to a cookware blank produced or made of the composite material according to the first aspect of the invention or the Ronde according to the second aspect of the invention
• the cookware blank has a bottom part and a wall portion surrounding the bottom part and can on its Inside and / or its outer side with a coating, in particular with a non-stick coating, for example made of Teflon be provided.
• Such cookware blanks can be produced inexpensively by forming, preferably deep drawing, from the composite material according to the invention and result after completion of finishing, such as turning the faces, and attaching handle elements according to the invention induction cooker suitable cookware of high quality, which a fourth and final aspect represent the invention.
• Figures 1 to 6 are each a section through a composite material according to the invention.
• FIG. 7 shows a section through one half of a cookware blank according to the invention from a further composite material according to the invention.
• the composite shows a section through a first multilayer plate-shaped composite material according to the invention for the production of induction cooker-suitable cookware.
• the composite consists of a first outer layer 1 of aluminum, which has a layer thickness of about 20 ⁇ m, of a second outer layer 2 of aluminum, which has a layer thickness of about 2.5 mm, as well as from a first core layer 3 made of ferromagnetic carbon steel arranged between these and having a layer thickness of approximately 0.5 mm.
• the layers 1, 2, 3 are intimately interconnected by roll-bonding, so that the composite can be deep-drawn without the layers 1, 2, 3 peeling off from each other.
• FIG. 2 shows a section through a second composite material according to the invention, which differs from that shown in FIG.
• FIG. 3 shows a section through a third composite material according to the invention, which differs from that shown in FIG. 2 only in that the second outer layer 2 in FIG.
• the last-mentioned layer is made of a different material instead of a ferritic stainless steel, for example of a carbon steel, and / or has a different layer thickness.
• 4 shows a section through a fourth composite material according to the invention, which differs from that shown in FIG. 3 only in that, instead of the second aluminum core layer 4 shown in FIG.
• a composite of a plurality of further core layers 4a , 4b, 4c, 4d, 4e is made of different aluminum alloys.
• the core layers 4a, 4b, 4c, 4d, 4e are each about 0.4 mm thick and the core layers 4a and 4d and 4b and 4e are each formed from identical alloys, so that, starting from the middle core layer 4c, a symmetrical resp ., mirror image structure of the composite results.
• the core layers 4a, 4b, 4c, 4d and 4e For example, the core layers 4a and 4d are about 0, 1 mm thick, the core layers 4b and 4e about 0.2 mm thick and the core layer 4c about 1.4 mm thick.
• the ker layers 4a, 4b, 4c, 4d, and 4e are made of pure aluminum and aluminum alloys.
• FIG. 5 shows a section through a fifth composite material according to the invention, which differs from that shown in FIG. 3 in that, instead of the approximately 2. 0 mm thick second core layer 4 made of aluminum shown in FIG. 0 mm thick second core layers 4 are present and between them an approximately 0.5mm thick further core layer 5 made of stainless steel, whereby the composite material shown receives a particularly high mechanical strength.
• FIG. 6 shows a section through a sixth composite material according to the invention, which differs from that shown in FIG. 5 only in that, instead of the two second core layers 4 made of aluminum shown in FIG a plurality of further core layers 4a, 4b, 4c and 4d, 4e, 4f of different aluminum alloys is present.
• the core layers 4a, 4b, 4c, 4d, 4e, 4f are each about 0.3 mm thick and the core layers 4a and 4f, 4b and 4e, and 4c and 4d each formed from identical Legie ⁇ ments, so that starting the two networks of the other, here about 0.6 mm thick core layer 5 give a symmetrical or mirror-image layer structure.
• the core layers 4a, 4b, 4c, 4d, 4e and 4f are of different thicknesses, for example.
• the core layers 4a, 4c, 4d and 4f are about 0.05 mm thick and the core layers 4b and 4e are about 0.6 mm thick.
• the ker layers 4a, 4b, 4c, 4d, 4e and 4f alternately consist of pure aluminum and an aluminum alloy.
• Fig. 7 shows a section through one half of a cookware blank according to the invention, which was produced by deep-drawing an inventive blank from a seventh inventive composite material.
• the composite material used here differs from that shown in Fig. 3 only in that instead of the shown in Fig. 3 about 2.0 mm thick second core layer 4 of aluminum as the second Kern ⁇ layer 4, an approximately 0.8 mm thick layer of copper and that on the two outer surfaces 1, 2 of aluminum on the inside of the cookware, a non-stick coating 6 made of Teflon and on the cookware outer side a decorative coating is present, wherein both coatings before Tief ⁇ pull on the circular blank were applied from composite material. While preferred embodiments of the invention are described in the present application, it should be clearly understood that the invention is not limited thereto and may be embodied otherwise within the scope of the following claims.

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• 2004
  • 2004-08-26 JP JP2007528548A patent/JP2008510531A/ja not_active Ceased
  • 2004-08-26 US US11/661,227 patent/US20070292706A1/en not_active Abandoned
  • 2004-08-26 WO PCT/CH2004/000539 patent/WO2006021101A1/de active Application Filing
  • 2004-08-26 EP EP04738164A patent/EP1781467A1/de not_active Withdrawn
  • 2004-08-26 CN CN200480043871.6A patent/CN101010190A/zh active Pending

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