Classifications

• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
• • 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
  • H05B6/00—Heating by electric, magnetic or electromagnetic fields
  • H05B6/02—Induction heating
  • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
  • H05B6/12—Cooking devices
  • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
  • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
  • C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
  • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
  • C04B35/624—Sol-gel processing
• • 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
  • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
• • 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
  • H05B6/00—Heating by electric, magnetic or electromagnetic fields
  • H05B6/02—Induction heating
  • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
  • H05B6/12—Cooking devices

Definitions

• the invention relates to a method for producing a carrier for a domestic appliance, in which a base material of the carrier is coated with a coating. Furthermore, the invention relates to a hob plate for an induction hob, which is produced by a method according to the invention and an advantageous embodiment thereof.
• Hob plate for hobs are made of different materials.
• glass materials such as glass ceramic are known in this context.
• hobs materials are needed in this context, which must meet a variety of conditions.
• a high resistance to breakage is required in this context, as is the resistance to high temperature differences.
• they must also withstand high weight requirements for carrying preparation vessels, such as pans, pots or the like.
• a method for producing a carrier for a household appliance comprises the step of providing the base material of the carrier with a coating is coated.
• the base material is produced by a casting process.
• Such an approach in the manufacture of such a carrier allows a variety of variations in terms of material design and composition. It is thus created the opportunity to satisfy the requirements, especially with regard to the hob plate improved.
• Last but not least, a cost-effective process can be made possible by such a procedure in the production.
• the base material is made of a polycrystalline silica powder and a gel-like suspension.
• Such a component compound and its resulting gelatinous and solid state allows in a particularly advantageous manner, the further processing, incorporation of other materials and thus the production of a carrier, which can accommodate the above-mentioned requirement particularly individualized.
• the ingredients polycrystalline silica powder and gel-like suspension are mixed together.
• the mixture of the constituents is prepared and processed in such a way that it has a pH between 8 and 11, in particular between 8.5 and 10.
• the mixing of these components with a mixer with a revolution between 700 U / min and 900 U / min in particular 800 U / min is performed.
• this mixing is carried out with said rotation of a mixer for a period of between 25 minutes and 35 minutes, in particular 30 minutes.
• this process step of mixing the ingredients is carried out at room temperatures.
• the silica powder is provided with grains which have an average particle size between 7.5 ⁇ m and 8.5 ⁇ m, in particular 8 ⁇ m.
• the gel-like suspension with silicon dioxide between 25% and 30% by weight, in particular 30% by weight, produced or provided.
• this gelatinous suspension is produced or provided with sodium oxide between 0.2% and 0.4% by weight, in particular 0.3%.
• the gel-like suspension is produced or provided with water between 65% and 75% by weight, in particular 69.7%. It should be mentioned at this point that the composition of the gelatinous suspension with the components silicon dioxide, sodium oxide and water in terms of their weight fractions takes place so that they each result in 100%.
• the base material is produced with a weight fraction of between 55% and 65%, in particular 60%, of the silica powder and with a weight fraction between 35% and 45%, in particular 40%, of the gelatinous suspension. It should be noted at this point that these weight percentages are to be understood only relative to one another between the named components and do not yield the 100% of the base material. It is therefore not to be understood that the base material consists only of these components. On the contrary, with regard to its final component composition, the base material may also comprise further materials, in particular reinforcing fibers.
• At least one reinforcing mat made of a fiber material made of crystalline silicon is immersed and impregnated in the suspension mixed with the silicon dioxide powder and placed in a casting mold.
• this insertion of the mats is done after immersion and soaking in the gel-like material.
• a carrier with the base material in the base material contains two such reinforcing mats which are impregnated accordingly.
• the thickness of the fibers of these reinforcing mats between 2 ⁇ and 4 ⁇ , in particular 3 ⁇ amount.
• a reinforcing mat is immersed in this gelatinous mixture of the silica powder and the suspension for a period of between 20 seconds and 40 seconds, in particular 30 seconds.
• the casting mold are nickel-coated aluminum parts, which are prepared in accordance with the shape and dimensions of the carrier to be produced.
• the mold includes in addition to a bottom plate form a ceiling mold plate and side walls.
• an oily medium is thus introduced into the bottom plate of the casting mold and moreover a certain proportion of the gelatinous mixture comprising the silicon dioxide powder and the suspension is introduced.
• the formation of bubbles in the introduction of the impregnated reinforcing mats and the subsequent generation and curing of the entire carrier can be avoided.
• the two impregnated reinforcement mats are then placed one on top of the other.
• a roller or the like is then used to roll back and forth on the inserted reinforcing mats, so that further air bubbles can be expelled.
• the ceiling mold plate of the mold is then applied and closed the casting tool.
• This mold has holes from which then excess gelatinous mixture material can leak.
• a removal of the side walls of the casting tool is performed after a longer period of time, in particular several hours, preferably 10 hours.
• a further period of time in particular here several hours, preferably 5 hours, then the ceiling mold plate or the ceiling mold wall of the casting mold is removed.
• a further period of time preferably 1 hour
• the carrier structure produced as a cooktop panel is removed from the casting tool.
• this intermediate component is then coated in the form of the hardened base material.
• a coating with an enamel-containing material is performed.
• a liquid solution with a powdery enamel material is provided.
• the proportion by weight of the enamel is 35%.
• a further flux material is introduced, preferably with a weight percentage of 7%.
• the remainder is distilled water.
• the components are introduced into an oven, which was preheated to a temperature of preferably 100 ° C. The coating is carried out therein, thereby preferably evaporating the water content in the coating material when the solution is applied to the base material.
• the base material is first enamel coated on the underside and then on the top and then subsequent to the side edges.
• a certain residence time is still waiting in the oven, which is preferably several minutes, in particular 10 minutes, in which the remaining water can evaporate.
• the component structure thus provided is then introduced into a furnace of several hundred degrees, preferably at about 900 ° C for a period of several minutes, in particular 10 minutes, so that the coating with the enamel can be virtually merged with the base material.
• a carrier which is a hob plate for a domestic appliance for preparing food prepared.
• the invention also relates to a hob plate for a hob, in particular an induction hob, which was prepared by the method according to the invention or an advantageous embodiment thereof.
• Fig. 1 is a schematic perspective view of an embodiment of a hob according to the invention with an embodiment of a cooktop panel according to the invention
• Fig. 2 is a schematic sectional view through an embodiment of a cooking field according to the invention.
• a hob 1 is shown in a schematic perspective view, which has a hob plate 2. On a top 3 of the hob plate 2 cooking zones 4, 5, 6 and 7 are formed on which preparation vessels for preparing food can be placed. In addition, the hob 1 comprises an operating and / or display device 8.
• the cooktop panel 2 comprises a central base material 9, which is coated with an enamel-containing material 10 on the upper side, on the lower side and on the side edges (not shown).
• the cooktop panel 2, and in particular the base material 9 are produced by a casting process.
• a gel-like mixture of polycrystalline silica powder and a gel-like suspension is provided.
• the grains of the silica powder have an average particle size of about 8 ⁇ .
• the gelatinous suspension is provided with silica having a weight percentage of 30% and a sodium oxide content of 0.3% and a weight proportion of water of 69.7%.
• the base material 9 is in a weight fraction of 60% silica powder and 40% of the gel-like suspension this is then corresponding to the weight formation of the gel-like mixture. This is then followed by an immersion of two reinforcing mats of a fiber material made of crystalline silicon having a fiber thickness of about 3 ⁇ , immersed and soaked. The insertion takes place for a period of about 30 seconds.
• the two reinforcing mats are then subsequently placed in a mold, the bottom mold plate is oiled or partially filled with an oily material and in addition the gel-like mixture of the silica powder and the gel-like suspension. Then the two reinforcing mats are inserted into this bottom mold plate.
• the subsequent manufacturing process for the base material 9 is carried out according to the procedure already described above. After this base material thus produced is then produced as a dimensionally stable part, it is coated with the material composition, so that the coating 10 is formed. Again, this is done according to an explanation given above with the material composition for the coating.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Manufacturing & Machinery (AREA)
• Electromagnetism (AREA)
• Physics & Mathematics (AREA)
• Structural Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Chemical & Material Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Dispersion Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Cookers (AREA)
• Paints Or Removers (AREA)
• Baking, Grill, Roasting (AREA)
• Application Of Or Painting With Fluid Materials (AREA)

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• 2010
  • 2010-07-14 ES ES201031073A patent/ES2372943B1/es not_active Expired - Fee Related
• 2011
  • 2011-06-30 WO PCT/IB2011/052890 patent/WO2012007864A1/de active Application Filing
  • 2011-06-30 CN CN201180034431.4A patent/CN102971275B/zh not_active Expired - Fee Related
  • 2011-06-30 EP EP11748995.5A patent/EP2593414A1/de not_active Withdrawn

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