CN111206246A - Pot and preparation method and application thereof - Google Patents
Pot and preparation method and application thereof Download PDFInfo
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- CN111206246A CN111206246A CN202010168882.8A CN202010168882A CN111206246A CN 111206246 A CN111206246 A CN 111206246A CN 202010168882 A CN202010168882 A CN 202010168882A CN 111206246 A CN111206246 A CN 111206246A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/02—Coating with enamels or vitreous layers by wet methods
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- 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
- A47J36/025—Vessels with non-stick features, e.g. coatings
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D11/00—Continuous processes; Apparatus therefor
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- Mechanical Engineering (AREA)
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- Food Science & Technology (AREA)
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Abstract
The application discloses a pot and a preparation method and application thereof, and belongs to the technical field of pots. The preparation method of the pot comprises the steps of providing a pot body made of metal; coating the bottom glaze slurry on the surface of the provided pot body, and then drying the surface to form a bottom glaze slurry layer; and after the bottom glaze slurry layer is wetted by water, coating surface glaze slurry on the surface of the bottom glaze slurry layer and sintering, wherein the bottom glaze slurry layer forms a bottom enamel layer and the surface glaze slurry layer forms a surface enamel layer, and the pot is prepared. According to the preparation method of the pot, the two-time sintering in the two-time enamel is simplified into one-time sintering, and the water wetting process is added in the two-time enamel, so that the production cost is reduced, the good mutual dissolution combination of the ground glaze slurry layer and the surface glaze slurry is ensured, the water content difference between the ground glaze slurry layer and the surface glaze slurry is reduced, the risk of cracking of the surface enamel layer formed after sintering is reduced, and the yield of the pot is greatly improved.
Description
Technical Field
The application relates to a pot and a preparation method and application thereof, and belongs to the technical field of pots.
Background
The enamel glaze can be coated on the surface of a metal substrate to form a thin glass enamel after sintering. The enamel layer made of enamel glaze has the characteristic of improving the surface of a base material, or can be used as a means for decoration to beautify and decorate a metal base material, so that the applicability of the enamel layer is wide and manifold.
In the kitchen household electrical appliances field, cooking utensils such as electricity rice cooker, electric pressure cooker extensively use the interior pot of iron, compare the inner bag of materials such as aluminum alloy, stainless steel, the pot has better heat conductivity and heat accumulation nature in the iron, and food is heated evenly, especially in the product of electromagnetic induction heating, the pot more can exert its unique advantage in the iron, excellent magnetic conductivity can promptly, response magnetic field that can be faster changes, and the electromagnetic induction heating effect is better.
The rust-proof treatment of the iron inner pot is a great problem, at present, enamel treatment is mainly adopted, the iron inner pot can meet the rust-proof requirement after being subjected to the enamel treatment, and compared with an untreated material, the enamel has certain non-stick property but has a large difference with a non-stick coating, so that the non-stick coating is arranged on the enamel layer on the inner surface of the inner pot to obtain a better non-stick effect. Based on above-mentioned requirement, prior art can adopt two-layer enamel to include end enamel layer and face enamel layer promptly, and end enamel layer provides with the cohesion of interior pot basic unit and basic barrier propterty rusts with the oxidation prevention, and face enamel layer provides certain roughness as middle transition layer, increases the adhesion fastness of non-stick layer on face enamel layer. However, the enamel glaze generally comprises metal oxide materials such as silicon dioxide and/or aluminum oxide, and has the characteristics of high strength, high temperature resistance, high stability and high adhesion with a metal substrate, so that the process time required by the enamel in the molding and sintering process is long, the sintering temperature is high, the processing cost is high, and the yield is low. In addition, the existing preparation method of the two-time enamel layer needs two-time enamel sintering, so that the production line switching time is long in the preparation process, the appearance reject ratio is high, and the final cost is high.
Disclosure of Invention
In order to solve the problems, the preparation method of the pot is provided, after a bottom glaze slurry layer is formed on the pot body, water is wetted, and a cover glaze is coated, the bottom enamel layer and the cover enamel layer are formed by sintering, the two-time sintering in the two-time enamel is simplified into one-time sintering, and a water wetting process is added in the two-time enamel, so that the preparation method of the pot is simplified, and the production cost is reduced; meanwhile, the good mutual-dissolving combination of the ground glaze slurry layer and the surface glaze slurry is ensured, and the water content difference between the ground glaze slurry layer and the surface glaze slurry is reduced, so that the risk of cracking of the surface enamel layer formed after sintering is reduced, and the yield of the cookware is greatly improved.
According to an aspect of the present application, there is provided a method of manufacturing a pot, including the steps of:
1) providing a pot body made of metal;
2) coating the bottom glaze slurry on the surface of the provided pot body, and then drying the surface to form a bottom glaze slurry layer;
3) and (3) wetting the bottom glaze slurry layer with water, coating surface glaze slurry on the surface of the bottom glaze slurry layer, sintering, forming a bottom enamel layer on the bottom glaze slurry layer and forming a surface enamel layer on the surface glaze slurry, and thus obtaining the pot.
Optionally, the metal material of the pan body may be selected from any simple metal or alloy harmless to human body, for example, steel, aluminum alloy and iron, and preferably, the metal material is iron.
Optionally, the thickness of the bottom enamel layer is 20-65 μm. Preferably, the lower limit of the thickness range of the bottom enamel layer is selected from 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm or 60 μm; the upper limit is selected from 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm or 60 μm. More preferably, the thickness of the bottom enamel layer is 25-55 μm. The bottom enamel layer is too thin to provide enough adhesion for the surface enamel layer, and too thick can influence insufficient sintering of the post-spraying surface enamel layer.
Optionally, the thickness of the top enamel layer is from 100 μm to 200 μm. Preferably, the lower limit of the thickness range of the enamel layer is selected from 120 μm, 140 μm, 160 μm or 180 μm; the upper limit is selected from 120 μm, 140 μm, 160 μm or 180 μm. More preferably, the thickness of the enamel layer is 120 μm to 180 μm. The enamel layer on the surface is too thin, so that the strength and the sealing property of the enamel layer are influenced, and the cost and the firing time are influenced.
Optionally, the sintering comprises: keeping the temperature for 5-10 min under the condition that the sintering temperature is 750-850 ℃.
Optionally, the sintering conditions comprise: heating to the sintering temperature at the heating rate of 75-170 ℃/min, cooling to 50 ℃ at the cooling rate of 50-150 ℃/min after sintering, and then carrying out self-heating cooling.
Optionally, the surface drying comprises maintaining at 100-200 ℃ for 8-30 min.
Optionally, the water wetting comprises forming a water layer of 10-30 μm on the surface of the ground glaze layer. Preferably, the lower limit of the thickness range of the water layer is selected from 15 μm, 20 μm or 25 μm; the upper limit is selected from 15 μm, 20 μm or 25 μm. More preferably, a water layer with the thickness of 15-25 μm is formed on the surface of the ground glaze layer.
Alternatively, the ground glaze slurry and the cover glaze slurry are a mixture of an enamel glaze and water which are industrially available, and the composition of the enamel glaze is not limited, for example, the main composition of the enamel glaze may include silica and/or alumina, and the raw material source of the enamel glaze may be kaolin and/or clay.
Optionally, performing shot blasting treatment on the pot body and then coating the bottom glaze slurry on the pot body; the roughness Ra of the surface of the pot body after shot blasting treatment is 3.5-9. Preferably, the surface roughness Ra of the pot body is 4.5-7.5. As an embodiment, the method of blasting includes the steps of: the pot body is placed in a shot blasting machine, and shot blasting is carried out for 5-15min by using small steel balls with 30-80 meshes. Too low roughness of the surface of the pan body provides insufficient adhesion, too high roughness causes high shot blasting cost, and the surface smoothness of the pan body is insufficient.
As a specific embodiment, a method for manufacturing a pot includes the steps of:
1) after the iron-containing plate is formed into a pot body, the inner surface and the outer surface of the pot body are subjected to cleaning, rust prevention, shot blasting and rust prevention again;
2) respectively coating bottom glaze slurry on the inner surface and the outer surface of the pot body, and then drying the surface to form a bottom glaze slurry layer;
3) after the bottom glaze slurry layer is wetted by water, coating surface glaze slurry on the surface of the bottom glaze slurry layer, drying, trimming, sintering and cooling, wherein the bottom glaze slurry layer forms a bottom enamel layer and the surface glaze slurry layer forms a surface enamel layer;
4) spraying oil, drying, printing, spraying oil and sintering on the inner surface of the pot body to form an inner non-stick layer;
5) and (4) spraying oil on the outer surface of the pot body, drying, printing and sintering to form an outer non-stick layer, thus obtaining the pot.
Alternatively, the composition of the inner and outer non-stick layers is not limited in the present application as long as the purpose of the non-stick pan of the present application is achieved, for example, the composition of the oil spray of the inner non-stick layer may be at least one of a fluorine paint, a ceramic paint, and an organic resin, and the composition of the oil spray of the outer non-stick layer may be at least one of a silicone, a fluorine paint, a ceramic paint, and an organic resin. Preferably, the oil-sprayed component of the outer non-stick layer is silicone.
The surface of the pan body in the present application comprises at least the portion of the inner surface of the pan body that is in contact with food when cooking the food; preferably, the surface of the pan body comprises the whole inner surface of the pan body; more preferably, the surface of the pan body comprises the inner surface and the outer surface of the pan body.
According to another aspect of the application, a pot is provided, which is prepared by any one of the preparation methods.
According to still another aspect of the present application, there is provided an electromagnetic heating electric food warmer, comprising a pan body, a pan cover and an electromagnetic heating element, the pan body comprising an outer pan and a pan disposed within the outer pan.
Benefits of the present application include, but are not limited to:
1. according to the preparation method of the pot, after the bottom glaze slurry layer is formed on the pot body, the water is wetted, the cover glaze is coated, and then the sintering is carried out to form the bottom enamel layer and the cover enamel layer, the two-time sintering in the two-time enamel is simplified into one-time sintering, the manual trimming, sintering crystallization and cooling processes of the bottom glaze slurry layer in the pot preparation process are reduced, and the production cost is greatly reduced; a water wetting process is added in the two-time enamel process, and after the surface-dried bottom glaze slurry layer is wetted by the water wetting process, the bottom glaze slurry layer and the surface glaze slurry sprayed behind can be well combined in a mutual dissolving way; meanwhile, the water wetting process improves the water content of the surface dry surface of the ground glaze slurry layer, greatly reduces the water content difference between the ground glaze slurry layer and the surface glaze slurry, effectively reduces the risk of cracking of the surface enamel layer, and greatly improves the yield of the cookware.
2. According to the preparation method of the pot, the pretreatment process of shot blasting on the surface of the pot body is added, and the roughness of the surface of the pot body is improved, so that the adhesive force of the pot body to an enamel layer is enhanced; meanwhile, after shot blasting, rust prevention treatment is carried out again, a new unprotected surface caused by shot blasting is provided, and the surface of the iron plate can be effectively prevented from rusting.
3. The application provides a pan, the binding force on the enamel layer of pan and the pot body surface is strong, and the binding force on end enamel layer and face enamel layer is strong and difficult fracture, and the non-stick layer has beautifully, seals and the good performance that is not stained with.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a partial sectional view of a pot according to an embodiment of the present application.
Detailed Description
In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.
So that the manner in which the above recited objects, features and advantages of the present application can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
In addition, in the description of the present application, it is to be understood that the terms, "upper", "lower", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be configured in a specific orientation, and operate, and thus, are not to be construed as limiting the present application.
In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Example 1
Referring to fig. 1, the pot of the present application includes a pot body 1 and a bottom enamel layer 2 and a top enamel layer 3 coated on the surface thereof. The pot body 1 is made of metal, the surface of the pot body 1 is coated with the ground glaze slurry and then dried to form a ground glaze slurry layer, the ground glaze slurry layer is wetted by water, the surface of the ground glaze slurry layer is coated with the ground glaze slurry and sintered, the ground glaze slurry layer forms a ground enamel layer 2, and the ground glaze slurry forms a ground enamel layer 3. Specifically, the surface of the pan body at least comprises the inner surface part of the pan body which is contacted with food when the food is cooked; preferably, the surface of the pan body comprises the whole inner surface of the pan body; more preferably, the surface of the pan body includes the inner and outer surfaces of the pan body as shown in FIG. 1.
As can be understood by those skilled in the art, the metal material of the pan body 1 can be selected from any simple metal or alloy which is harmless to human body, such as steel, aluminum alloy and iron; the cookware is preferably made of iron materials such as various cast irons and iron-based alloys, and has unique advantages when being used as an inner pot for electromagnetic induction heating due to the excellent magnetic conductivity of iron, so that the cookware can respond to the change of a magnetic field more quickly and has better heating effect.
The pot body of this embodiment is spherical curve, and the biggest internal diameter department in cross section internal diameter middle part of the pot body reduces to pot body oral area and pot body bottom gradually, and this kind of spherical pot body has fine heat convection characteristic, can improve the heat convection form of the pot body for the temperature distribution in the pot body is more even. Of course, the pan body may also be generally cylindrical or other shapes.
Specifically, the thickness of the bottom enamel layer 2 is 20 to 65 μm, specifically, 30 μm, 40 μm, 50 μm, 60 μm or the like. If the bottom enamel layer 2 is too thin, the bottom enamel layer 2 cannot provide sufficient adhesion to the top enamel layer 3; if the bottom enamel layer 2 is too thick, the sintering of the rear spray-coated surface enamel layer 3 is not sufficient.
Further, the surface enamel layer has a certain roughness, and the thickness of the surface enamel layer 3 is 100 μm to 200 μm, specifically 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, or the like. If the top enamel layer 3 is too thin, the strength and sealing property of the top enamel layer 3 are affected, and if it is too thick, the cost is increased, and the sintering time is affected.
Preferably, the surface enamel layer 3 is also provided with an anti-adhesion layer, the bottom enamel layer 2 provides a binding force with the surface of the pot body 1 and basic protective performance so as to prevent oxidation and rusting, the surface enamel layer 3 serves as a middle transition layer to provide certain roughness, the adhesion fastness of the anti-adhesion layer on the surface enamel layer is increased, the anti-adhesion layer not only strengthens the protection of an iron base, but also more importantly facilitates the cleaning of a pot.
The embodiment provides a method for manufacturing any pot, which comprises the following steps:
1) providing a metal pan body 1;
2) coating the bottom glaze slurry on the surface of the provided pot body, and then drying the surface to form a bottom glaze slurry layer;
3) and (3) wetting the bottom glaze slurry layer with water, coating surface glaze slurry on the surface of the bottom glaze slurry layer, sintering, forming a bottom enamel layer 2 on the bottom glaze slurry layer and forming a surface enamel layer 3 on the surface glaze slurry layer, and thus obtaining the pot.
Alternatively, the ground glaze slurry and the cover glaze slurry are a mixture of an enamel glaze and water which are industrially available, and the composition of the enamel glaze is not limited, for example, the main composition of the enamel glaze may include silica and/or alumina, and the raw material source of the enamel glaze may be kaolin and/or clay.
As an embodiment, the enameling is wet enameling, and the coating may be spray coating, dip coating, or the like.
Specifically, the sintering comprises: keeping the temperature for 5-10 min under the condition that the sintering temperature is 750-850 ℃. Further, the sintering conditions include: heating to the sintering temperature at the heating rate of 75-170 ℃/min, cooling to 50 ℃ at the cooling rate of 50-150 ℃/min after sintering, and then carrying out self-heating cooling. The combination between the bottom enamel layer and the surface of the pot body and between the bottom enamel layer and the surface enamel layer is firmer and is not easy to crack, the glaze surface is not fully crystallized or becomes brittle due to excessive sintering of the glaze when the temperature rising rate is too high, and the energy consumption is wasted when the temperature rising rate is too low; if the cooling rate is too fast, the surface is not fully crystallized and becomes brittle, and if the cooling rate is too slow, the energy consumption is wasted.
Specifically, the surface drying comprises maintaining at 100-200 ℃ for 8-30 min. Preferably, the surface drying comprises maintaining at 120-150 ℃ for 10-25 min. If the surface moisture content is too high, the surface drying time is long or the surface drying is incomplete, and if the surface moisture content is too low, the surface loses water excessively, and cracks appear. And wetting with water in a surface dry state, preferably selecting pure water as water, forming a water layer of 10-30 mu m on the surface of the ground glaze layer, and coating the surface glaze slurry after the ground glaze layer absorbs the water layer. The thickness of the water layer may be 15 μm, 20 μm, 25 μm, or the like. More preferably, a water layer with the thickness of 15-25 μm is formed on the surface of the ground glaze layer. The bottom glaze slurry layer is not easy to deform when being coated with the surface glaze slurry after being dried and wetted by the water layer with the specific thickness, and the water content difference between the bottom glaze slurry layer and the surface glaze slurry is greatly reduced.
In a preferred embodiment, the pot body is firstly subjected to shot blasting treatment and then coated with bottom glaze slurry; the roughness Ra of the surface of the pot body after shot blasting treatment is 3.5-9. Preferably, the surface roughness Ra of the pot body is 4.5-7.5. As an embodiment, the method of blasting includes the steps of: the pot body is placed in a shot blasting machine, and shot blasting is carried out for 5-15min by using small steel balls with 30-80 meshes. Too low roughness of the surface of the pan body provides insufficient adhesion, too high roughness causes high shot blasting cost, and the surface smoothness of the pan body is insufficient.
As a specific embodiment, a method for manufacturing a pot includes the steps of:
1) after the iron-containing plate is formed into a pot body, cleaning, rust prevention, shot blasting and rust prevention again are carried out on the inner surface and the outer surface of the pot body, wherein the roughness Ra of the surface of the pot body after shot blasting is 3.5-9; then, rust prevention is provided for an unprotected new surface caused by shot blasting, so that the surface of the iron plate is prevented from rusting, and the rust prevention can be carried out by adopting treatment such as silane, phosphorization, vitrification and the like;
2) respectively coating bottom glaze slurry on the inner surface and the outer surface of the pot body, and then drying the surface to form a bottom glaze slurry layer;
3) after the bottom glaze slurry layer is wetted by water, coating surface glaze slurry on the surface of the bottom glaze slurry layer, drying, trimming, sintering in a high-temperature sintering furnace, and cooling, wherein the bottom glaze slurry layer forms a bottom enamel layer and the surface glaze slurry layer forms a surface enamel layer; wherein, the water wetting comprises forming a water layer with the thickness of 10-30 mu m on the surface of the ground glaze layer, and surface drying for 10min at the temperature of 100-200 ℃;
4) spraying oil, drying, printing, spraying oil and sintering on the inner surface of the pot body to form an inner non-stick layer film so as to form a non-stick layer;
5) and (4) spraying oil on the outer surface of the pot body, drying, printing and sintering to form an outer non-stick film, thus obtaining the pot. The qualification rate of the pot is over 90 percent, which is 10 percent higher than that of the pot which is prepared by twice sintering of the traditional twice enameling.
Step 2) in the preparation method of the pot of the embodiment reduces finishing, sintering crystallization and cooling of the ground glaze slurry layer, wherein high-temperature sintering and manual finishing are reduced, and the production cost is greatly reduced. Wetting the surface of the bottom glaze slurry layer which is surface-dried in the step 3) to ensure that the surface layer enamel of the bottom glaze slurry layer and the surface glaze slurry sprayed behind can be well mutually dissolved and combined.
In the traditional two-time enamel process, the step 2) also comprises the steps of trimming, sintering and cooling the surface-dried base glaze slurry layer to form the base enamel layer, because the surface of the base glaze slurry layer is dried, sintered and crystallized, the water content of the base enamel slurry layer is extremely low, and when the surface glaze slurry is sprayed, the surface glaze slurry is a mud-water mixture with extremely high water content, the gradient difference of the water content of the base enamel layer and the surface glaze slurry is too large, and the shrinkage rate of the joint surface of the base enamel layer and the surface glaze slurry in the subsequent surface drying process is inconsistent; causing cracks in the enamel layer behind the surface layer and causing extremely high fraction defective. And the water spray of this application is moist, has improved the water content of the dry face of end glaze thick liquid layer surface, greatly reduced the moisture content difference between two-layer, effectively reduced the risk of face enamel layer fracture, improve the pan yields.
Specifically, the composition of the inner non-stick layer and the outer non-stick layer in the present embodiment is not limited as long as the object of the non-stick pan of the present application is achieved, and for example, the composition of the oil spray of the inner non-stick layer may be at least one of a fluorine paint, a ceramic paint, and an organic resin; the oil-sprayed component of the outer non-stick layer may be at least one of silicone, fluorine paint, ceramic paint and organic resin. Preferably, the oil injection component of the outer non-stick layer is organic silicon, and the organic silicon layer has the function of strengthening protection and increases the texture of the cookware.
Example 2
The embodiment provides an electromagnetic heating electric food warmer, which comprises a pan body, a pan cover and an electromagnetic heating element, wherein the pan body comprises an outer pan and any pan of the embodiment 1 placed in the outer pan. The electromagnetic heating element can be an electromagnetic wire coil or a heating coil. The electric cooker can be a kitchen appliance for containing food materials in an electric cooker, an electric pressure cooker, a cooking machine and the like.
The above description is only an example of the present application, and the protection scope of the present application is not limited by these specific examples, but is defined by the claims of the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The preparation method of the pot is characterized by comprising the following steps:
1) providing a pot body made of metal;
2) coating the bottom glaze slurry on the surface of the provided pot body, and then drying the surface to form a bottom glaze slurry layer;
3) and after the bottom glaze slurry layer is wetted by water, coating surface glaze slurry on the surface of the bottom glaze slurry layer and sintering, wherein the bottom glaze slurry layer forms a bottom enamel layer and the surface glaze slurry layer forms a surface enamel layer, and the pot is prepared.
2. The method of manufacturing a pot according to claim 1, wherein the thickness of the bottom enamel layer is 20-65 μm.
3. The method of manufacturing a pot according to claim 1, wherein the thickness of the enamel layer is 100 μm to 200 μm.
4. The method of making cookware according to claim 1, wherein said sintering comprises: keeping the temperature for 5-10 min under the condition that the sintering temperature is 750-850 ℃.
5. The method of manufacturing a cookware according to claim 4, wherein said sintering conditions include: heating to the sintering temperature at the heating rate of 75-170 ℃/min, cooling to 50 ℃ at the cooling rate of 50-150 ℃/min after sintering, and then carrying out self-heating cooling.
6. The method for manufacturing a pot according to claim 1, wherein the surface drying comprises maintaining at 100-200 ℃ for 8-30 min;
and the water wetting step comprises the step of forming a water layer of 10-30 mu m on the surface of the ground glaze layer.
7. The method for manufacturing a pot according to any one of claims 1 to 6, wherein the pot is shot-blasted and then coated with a ground glaze slurry;
the roughness Ra of the surface of the shot-blasted pot body is 3.5-9.
8. The method for manufacturing a pot according to claim 7, characterized in that it comprises the following steps:
1) after the iron-containing plate is formed into a pot body, the inner surface and the outer surface of the pot body are subjected to cleaning, rust prevention, shot blasting and rust prevention again;
2) respectively coating bottom glaze slurry on the inner surface and the outer surface of the pot body, and then drying the surface to form a bottom glaze slurry layer;
3) after the bottom glaze slurry layer is wetted by water, coating surface glaze slurry on the surface of the bottom glaze slurry layer, drying the surface, finishing, sintering and cooling, wherein the bottom glaze slurry layer forms a bottom enamel layer and the surface glaze slurry layer forms a surface enamel layer;
4) spraying oil, drying, printing, spraying oil and sintering on the inner surface of the pot body to form an inner non-stick layer;
5) and (3) spraying oil on the outer surface of the pot body, drying, printing and sintering to form an outer non-stick layer, thus obtaining the pot.
9. A cookware, characterized by being prepared by the preparation method of any one of claims 1 to 8.
10. An electromagnetic heating electric cooker comprising a body, a lid and an electromagnetic heating element, said body comprising an outer pot and the pot of claim 9 disposed within said outer pot.
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| CN202010168882.8A CN111206246A (en) | 2020-03-12 | 2020-03-12 | Pot and preparation method and application thereof |
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| CN202010168882.8A CN111206246A (en) | 2020-03-12 | 2020-03-12 | Pot and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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