CN106086763B - Pot and preparation method thereof - Google Patents
Pot and preparation method thereof Download PDFInfo
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- CN106086763B CN106086763B CN201610430395.8A CN201610430395A CN106086763B CN 106086763 B CN106086763 B CN 106086763B CN 201610430395 A CN201610430395 A CN 201610430395A CN 106086763 B CN106086763 B CN 106086763B
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- stick coating
- intermediate layer
- pot
- pot body
- wall surface
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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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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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
- A47J27/00—Cooking-vessels
- A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
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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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- 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
- A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
Abstract
The invention provides a pot and a preparation method thereof, wherein the pot comprises the following steps: the pot comprises a pot body, an intermediate layer and a non-stick coating, wherein the intermediate layer is attached to the inner wall surface of the pot body, and the intermediate layer comprises chromium oxide and magnesium oxide; the non-stick coating is attached to the face of the intermediate layer. The invention provides a cookware made of Cr2O3The intermediate layer formed of MgO has a compact internal structure, a very low porosity and Cr2O3The non-stick coating has the advantages that the non-stick coating and MgO oxides have higher hardness and excellent wear resistance and corrosion resistance, the deformation of the whole non-stick coating under the action of compressive stress is obviously reduced, the non-stick coating is not easy to fatigue damage and fall off caused by long-term stress strain, the service life of the whole non-stick coating is obviously prolonged, the fatigue damage degree of the non-stick coating is greatly reduced, the service life of the non-stick coating is greatly prolonged, and the use stability and the health of a cookware are improved.
Description
Technical Field
The invention relates to the field of kitchen utensils, in particular to a pot and a preparation method thereof.
Background
The non-stick coating on the surface of the prior aluminum product (inner container of electric cooker or electric pressure cooker, frying pan, etc.) is mostly made of water-based fluororesin coating, it mainly improves the hardness of the surface of a substrate by carrying out conventional treatment modes such as anodic oxidation or sand blasting on the surface of a pot, further spraying PTFE (polytetrafluoroethylene) or PFA (tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer) coating to form a non-stick coating, the middle anode alumina layer or the sanding layer at the bottom of the fluororesin non-stick coating has lower hardness and poorer wear resistance, so that the non-stick coating is easy to have larger strain deformation under the action of compressive stress, and the whole non-stick coating is easy to generate stress fatigue damage, so that after the non-stick coating is used for a period of time, the problems of falling off and the like caused by cleaning, scraping and the like are solved, and the service life of the whole non-stick coating is greatly shortened.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
To this end, an aspect of the present invention is directed to a pot.
Another aspect of the present invention is to provide a method for preparing the above-mentioned pot.
To achieve the above object, an embodiment of a first aspect of the present invention provides a pot, including: a pan body; the middle layer is attached to the inner wall surface of the pot body, and the components of the middle layer comprise chromium oxide and magnesium oxide; and the non-stick coating is attached to the layer surface of the middle layer.
In the cookware provided by the above embodiment of the invention, the intermediate layer is additionally arranged on the inner wall surface of the cookware body, and the non-stick coating is additionally arranged on the layer surface of the intermediate layer, namely, the intermediate layer is positioned between the cookware body and the non-stick coating and comprises chromium oxide (Cr)2O3) And magnesium oxide (MgO), has low porosity due to dense internal structure of the intermediate layer, and Cr2O3And MgO oxidationThe non-stick coating has higher hardness and excellent wear resistance and corrosion resistance, and can obviously reduce the deformation of the non-stick coating under the action of compressive stress, so that the non-stick coating is not easy to have fatigue damage and shedding caused by long-term stress strain, the fatigue damage degree of the non-stick coating is reduced, and the service life of the non-stick coating is obviously prolonged; and the thermal conductivity of MgO is relatively high, which is helpful to improve the thermal conductivity of the whole oxide interlayer 20 and improve the heating uniformity of the cookware in the heating process.
Preferably, the pan body is made of aluminum or an aluminum alloy.
The pot prepared by the invention can be used for an inner pot of an electric cooker or an electric pressure cooker, and can also be used for a frying pan or a frying pan and the like.
In addition, the pot provided by the embodiment of the invention also has the following additional technical characteristics:
in the above technical solution, the thickness of the intermediate layer is preferably 20 μm to 70 μm.
In the embodiment, the thickness of the middle layer is controlled within the range of 20-70 μm, so that the binding force between the middle layer and the non-stick coating and between the middle layer and the pot body can be ensured, and the condition that the cost of the pot is increased due to the overlarge thickness of the middle layer can be avoided.
An embodiment of a second aspect of the present invention provides a method for manufacturing a pot, which is used for manufacturing the pot of any one of the above embodiments, and the method for manufacturing the pot includes: spraying a mixture comprising chromium oxide and magnesium oxide on the inner wall surface of the pot body by using a plasma spraying method to prepare an intermediate layer on the pot body; a non-stick coating is prepared on the level of the intermediate layer.
In the method for manufacturing the pot provided by the embodiment of the invention, the plasma spraying technology is adopted to spray the chromium sesquioxide (Cr) on the inner wall surface of the pot body2O3) And magnesium oxide (MgO) to form an intermediate layer on the pan body and then to form a non-stick coating on the intermediate layer, in particular, Cr is used2O3Mixed powder of MgO and MgO as a spray material, sprayed by means of a supersonic plasma arcThe coating equipment heats the mixed powder into a molten or semi-molten state under the action of plasma arc inside the spray gun, and uniformly sprays the mixed powder to the inner wall surface of the pot body to be sprayed under the protection and assistance of high-speed airflow to form an intermediate layer.
Wherein the preparation of the coating comprises Cr by supersonic plasma spraying2O3And the wear-resistant oxide layer formed by MgO is used as an intermediate layer, the surface of the nano oxide wear-resistant intermediate layer has certain roughness, good bonding force with the non-stick coating is ensured, the internal structure of the intermediate layer is compact, the intermediate layer has very low porosity, and Cr2O3The MgO and MgO oxides have higher hardness and excellent wear resistance and corrosion resistance, the deformation of the non-stick coating under the action of compressive stress can be obviously reduced, the non-stick coating is not easy to have fatigue damage and falling caused by long-term stress strain, the fatigue damage degree of the non-stick coating is reduced, the service life of the whole non-stick coating is obviously prolonged, the safety performance of the non-stick coating is finally improved, the requirements of consumers on the safety, health, durability and other series of the non-stick coating of a product can be met, a plurality of advantages of the non-stick coating can be ensured, the problems that in the related technology, the hardness of an anodic aluminum oxide intermediate layer or a sand blasting reinforcing layer and the like on the inner side of the non-stick coating is low, the non-stick coating is easy to deform and fatigue damage under the; in addition, the thermal conductivity of MgO is relatively high, which is beneficial to improving the thermal conductivity of the whole oxide interlayer and improving the heating uniformity of the cookware in the heating process.
In a specific embodiment, the porosity of the middle layer is lower than 5%, the microhardness is as high as 900-1400 HV, and the bonding force is 25-40 Mpa.
In the above technical solution, preferably, in the mixture, the mass fraction of the chromium trioxide is 70% to 90%.
In the above examples, the mixture was made of Cr2O3And MgO, wherein, Cr2O370-90% by mass, and 30-10% by mass of MgO, based on the total mass of the Cr2O3And an intermediate layer made of MgO, havingHas extremely low porosity, high hardness, excellent wear resistance and corrosion resistance, and is suitable for Cr2O3After a small amount of MgO is added, the heat-conducting property of the cookware can be obviously improved, and the uniformity of heating everywhere in the heating process of the cookware is improved. Of course, except for Cr2O3And MgO, the mixture may also contain one or more other substances.
In the above technical solution, preferably, the average particle size of the chromium sesquioxide is 10 μm to 40 μm; the average grain diameter of the magnesium oxide is 10-40 mu m.
In the above examples, Cr is used2O3And the average grain diameter of MgO is controlled in the range of 10-40 μm, which is convenient for adopting the plasma spraying technology.
The specific process parameters of plasma spraying are as follows: the spraying current is 400-650A, the spraying voltage is 60-150V, and the argon flow is 4-8 m3The nitrogen flow is 1.5-2.5 m3H, hydrogen flow rate of 1-2 m3The powder feeding speed is 2-4 kg/h, and the spraying distance is 100-250 mm.
In the above technical solution, preferably, the preparation method of the pot further includes: before the intermediate layer is prepared, the inner wall surface of the pot body is subjected to sand blasting treatment.
In the embodiment, the inner wall surface of the pot body is subjected to sand blasting treatment by using an automatic sand blasting machine, so that an uneven structure is formed on the inner wall surface of the pot body, the contact area between the middle layer and the pot body can be increased, the bonding force between the middle layer and the pot body is further increased, and the falling probability of the non-stick coating is further reduced; preferably, after the sand blasting treatment, the airflow is adopted to blow off fine sand adhered to the inner wall surface of the pot body after the sand blasting treatment, so that the cleanness of the inner wall surface of the pot body is ensured, and the adhesion of the middle layer is facilitated.
Preferably, before the sand blasting treatment, the inner wall surface of the pot body is subjected to degreasing and degreasing treatment to remove impurities such as oil stains on the inner wall surface and improve the cleanliness of the inner wall surface.
In the above technical solution, preferably, after the sand blasting treatment, the roughness of the inner wall surface of the pan body is 60 μm to 80 μm.
In the embodiment, the roughness of the inner wall surface of the pot body is not less than 60 microns, so that the phenomenon that the roughness is too small and the effect of improving the bonding force between the middle layer and the pot body is not achieved can be avoided; the roughness is not more than 80 μm, so that the situation that the strength of the pot body is seriously reduced due to overlarge roughness can be avoided.
In the above technical solution, preferably, after the sand blasting process and before the intermediate layer is prepared, the preparation method of the pot further includes: and carrying out preheating treatment on the inner wall surface of the pot body, wherein the treatment temperature of the preheating treatment is 150-200 ℃, and the treatment time is 2-3 min.
In the above embodiment, the inner wall surface of the pan body is subjected to the preheating treatment, so that the thermal stress generated in the plasma thermal spraying process (the process of preparing the intermediate layer) can be reduced, and the bonding force between the intermediate layer and the inner wall surface of the pan body can be improved.
Of course, those skilled in the art will understand that the roughness of the inner wall surface of the pot body after the sand blasting, the preheating temperature of the pot body, and the preheating time period are not limited to the above specific values, and can be adjusted as required in the actual production process.
In the above technical solution, preferably, the preparation of the non-stick coating on the layer of the intermediate layer specifically includes: and spraying fluororesin paint on the surface of the middle layer to form the non-stick coating.
Preferably, the intermediate layer is sprayed and sintered with water-based fluororesin coating composed of base oil and surface oil, specifically, the layer of the intermediate layer is sprayed with the base oil, and the layer of the base oil is sprayed with the surface oil to form the non-stick coating, and the thickness of the non-stick coating is preferably 20-35 μm, so that the service life of the non-stick coating can be ensured, and the problem of pot cost increase caused by overlarge thickness of the non-stick coating can be avoided.
In the above technical solution, preferably, before the step of spraying a fluororesin coating on the surface of the intermediate layer to form the non-stick coating, the method for manufacturing a cookware further includes: carrying out degreasing treatment on the intermediate layer; and drying the degreased middle layer, wherein the drying temperature is 100-200 ℃.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic sectional view of a pot according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
fig. 3 is a flow chart of a method for manufacturing a pot according to a first embodiment of the invention;
fig. 4 is a flowchart of a manufacturing method of a pot according to a second embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:
10 pan body, 20 middle layers, 30 non-stick coating.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to 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 invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
A cookware and a method of manufacturing the same according to some embodiments of the present invention are described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the embodiment of the first aspect of the present invention provides a pot, comprising a pot body 10, an intermediate layer 20 and a non-stick coating 30, wherein the intermediate layer 20 is attached to the inner wall surface of the pot body 10, and the composition of the intermediate layer 20 comprises chromium oxide and magnesium oxide; a non-stick coating 30 is applied to the face of the intermediate layer 20.
In the cookware provided by the above embodiment of the invention, the intermediate layer 20 is attached to the inner wall surface of the pan body 10, the non-stick coating 30 is attached to the layer surface of the intermediate layer 20, that is, the intermediate layer 20 is located between the pan body 10 and the non-stick coating 30, and the intermediate layer 20 is made of chromium oxide (Cr) oxide2O3) And magnesium oxide (MgO), has a low porosity due to a dense internal structure of the intermediate layer 20, and Cr2O3The MgO oxide and the non-stick coating 30 have higher hardness and excellent wear resistance and corrosion resistance, and can obviously reduce the deformation of the non-stick coating 30 under the action of compressive stress, so that the non-stick coating 30 is not easy to have fatigue damage and fall off under the action of long-term stress strain, the fatigue damage degree of the non-stick coating 30 is reduced, and the service life of the non-stick coating 30 is obviously prolonged; and the thermal conductivity of MgO is relatively high, which is helpful to improve the thermal conductivity of the whole oxide interlayer 20 and improve the heating uniformity of the cookware in the heating process.
Preferably, the pan body 10 is made of aluminum or aluminum alloy.
The pot prepared by the invention can be used for an inner pot of an electric cooker or an electric pressure cooker, and can also be used for a frying pan or a frying pan and the like.
Preferably, the thickness of the intermediate layer 20 is 20 μm to 70 μm.
In the above embodiment, the thickness of the middle layer 20 is controlled within the range of 20 μm to 70 μm, which not only can ensure the bonding force between the middle layer 20 and the non-stick coating 30 and between the middle layer 20 and the pot body 10, but also can avoid the occurrence of the increase of the cost of the pot caused by the excessive thickness of the middle layer 20.
Embodiments of the second aspect of the present invention provide a method for manufacturing a pot, which is used for manufacturing the pot described in any of the above embodiments, and the method for manufacturing the pot is described below with reference to some specific embodiments.
The first embodiment is as follows:
as shown in fig. 3, the preparation method of the pot includes:
step S100, spraying a mixture including chromium oxide and magnesium oxide on the inner wall surface of the pot body 10 by using a plasma spraying method to prepare an intermediate layer 20 on the pot body 10;
step S102, a non-stick coating 30 is prepared on the level of the intermediate layer 20.
In the method for manufacturing the pot provided by the above embodiment, the plasma spraying technology is adopted to spray the Cr on the inner wall surface of the pot body 102O3And MgO, to form an intermediate layer 20 on the pan body 10, and then to prepare a non-stick coating 30 at the level of the intermediate layer 20, in particular, using Cr2O3The mixed powder of MgO and MgO is used as a spraying material, and is heated into a molten or semi-molten state under the action of plasma arc in a spray gun by supersonic plasma arc spraying equipment, and is uniformly sprayed to the inner wall surface of the pot body 10 to be sprayed under the protection and the assistance of high-speed airflow to form the intermediate layer 20.
Wherein the preparation of the coating comprises Cr by supersonic plasma spraying2O3And MgO as an intermediate layer 20, the surface of the nano oxide wear-resistant intermediate layer 20 has a certain roughness to ensure good bonding force with the non-stick coating 30, and the intermediate layer 20 has a compact internal structure and low porosity, and Cr2O3The MgO oxide and the non-stick coating have higher hardness and excellent wear resistance and corrosion resistance, can obviously reduce the deformation of the non-stick coating 30 under the action of compressive stress, so that the non-stick coating 30 is not easy to have fatigue damage and fall off caused by long-term stress strain, the fatigue damage degree of the non-stick coating 30 is reduced, the service life of the whole non-stick coating 30 is obviously prolonged, the safety performance of the non-stick coating 30 is finally improved, can meet the series requirements of consumers on safety, health, durability and the like of the non-stick coating 30 of the product, not only can ensure the advantages of the non-stick coating 30, but also can overcome the defects that the hardness of the anodic alumina intermediate layer 20 or the sand blasting strengthening layer and the like at the inner side of the non-stick coating 30 in the related technology is lower, the non-stick coating 30 is easy to deform and fatigue damage under the stress condition, further causing the problems that the non-stick coating 30 is easy to fall off and peel off and the like, and improving the stability and the health of the pot; in addition, the thermal conductivity of MgO is relatively highThe heat conductivity of the whole oxide intermediate layer 20 is improved, and the heating uniformity of the cookware in the heating process is improved.
In a specific embodiment, the porosity of the intermediate layer 20 is less than 5%, the microhardness is as high as 900-1400 HV, and the bonding force is 25-40 MPa.
Preferably, the mass fraction of the chromium oxide in the mixture is 70-90%.
In the above examples, the mixture was made of Cr2O3And MgO, wherein, Cr2O370-90% by mass, and 30-10% by mass of MgO, based on the total mass of the Cr2O3And an intermediate layer 20 of MgO having a very low porosity, a high hardness, excellent wear and corrosion resistance, and in Cr2O3After a small amount of MgO is added, the heat-conducting property of the cookware can be obviously improved, and the uniformity of heating everywhere in the heating process of the cookware is improved. Of course, except for Cr2O3And MgO, the mixture may also contain one or more other substances.
Preferably, the average grain diameter of the chromium oxide is 10-40 μm; the magnesium oxide has an average particle diameter of 10 to 40 μm.
In the above examples, Cr is used2O3And the average grain diameter of MgO is controlled in the range of 10-40 μm, which is convenient for adopting the plasma spraying technology.
Preferably, the thickness of the intermediate layer 20 is 20 μm to 70 μm.
In the above embodiment, the thickness of the middle layer 20 is controlled within the range of 20 μm to 70 μm, which not only can ensure the bonding force between the middle layer 20 and the non-stick coating 30 and between the middle layer 20 and the pot body 10, but also can avoid the occurrence of the increase of the cost of the pot caused by the excessive thickness of the middle layer 20.
The specific process parameters of plasma spraying are as follows: the spraying current is 400-650A, the spraying voltage is 60-150V, and the argon flow is 4-8 m3The nitrogen flow is 1.5-2.5 m3H, hydrogen flow rate of 1-2 m3The powder feeding speed is 2-4 kg/h, and the spraying distance is 100-250 mm.
Preferably, the preparation of the non-stick coating 30 at the level of the intermediate layer 20 comprises in particular: the non-stick coating 30 is formed by spraying a fluororesin paint on the surface of the intermediate layer 20.
Preferably, the intermediate layer 20 is sprayed and sintered with a water-based fluororesin coating composed of a primer and a finish, specifically, the primer is sprayed on the surface of the intermediate layer 20, and the finish is sprayed on the surface of the primer to form the non-stick coating 30, and preferably, the thickness of the non-stick coating 30 is 20 μm to 35 μm, so that the service life of the non-stick coating 30 can be ensured, and the problem of pot cost increase caused by the excessive thickness of the non-stick coating 30 can be avoided.
Example two:
as shown in fig. 4, the preparation method of the pot includes:
step S200, degreasing and deoiling the inner wall surface of the pot body 10;
step S202, performing sand blasting treatment on the inner wall surface of the pot body 10;
step S204, carrying out preheating treatment on the inner wall surface of the pot body 10, wherein the treatment temperature of the preheating treatment is 150-200 ℃, and the treatment time is 2-3 min;
step S206, spraying a mixture comprising chromium oxide and magnesium oxide on the inner wall surface of the pot body 10 by using a plasma spraying method to prepare the intermediate layer 20 on the pot body 10;
step S208, degreasing the intermediate layer 20;
step S210, drying the intermediate layer 20, wherein the drying temperature is 100-200 ℃;
step S212, a non-stick coating 30 is prepared at the level of the intermediate layer 20.
In the above embodiment, it is preferable that the inner wall surface of the pot body 10 is degreased and degreased before the blasting treatment, to remove impurities such as oil stains on the inner wall surface, thereby improving the cleanliness of the inner wall surface. The inner wall surface of the pan body 10 is subjected to sand blasting treatment, so that an uneven structure is formed on the inner wall surface of the pan body 10, the contact area between the middle layer 20 and the pan body 10 can be increased, the bonding force between the middle layer 20 and the pan body 10 is further increased, and the falling probability of the non-stick coating is further reduced; preferably, after the sand blasting treatment, the air flow is used to blow off fine sand adhered to the inner wall surface of the pot body 10 after the sand blasting treatment, so as to ensure the cleanness of the inner wall surface of the pot body 10, and facilitate the adhesion of the intermediate layer 20.
Preferably, the roughness of the inner wall surface of the pot body 10 after the sand blast treatment is 60 to 80 μm.
The roughness of the inner wall surface of the pan body 10 is not less than 60 μm, so that the phenomenon that the roughness is too small and the bonding force between the middle layer 20 and the pan body 10 is not improved can be avoided; the roughness is not more than 80 μm, so that the situation that the strength of the pan body 10 is seriously reduced due to overlarge roughness can be avoided.
Preferably, the inner wall surface of the pot body 10 is subjected to a preheating treatment, so that thermal stress generated in a plasma thermal spraying process (a process of preparing the intermediate layer 20) can be reduced, and the bonding force between the intermediate layer 20 and the inner wall surface of the pot body 10 can be improved.
Of course, those skilled in the art will understand that the roughness of the inner wall surface of the pot body 10 after the sand blasting, the preheating temperature of the pot body 10, and the preheating time period are not limited to the above specific values, and can be adjusted as required in the actual production process.
In the second embodiment, one or more other steps except steps S206 and S212 may be omitted to obtain other embodiments.
In one embodiment of the invention, the preparation method of the pot comprises the following steps:
deoiling and degreasing the pot body 10;
carrying out sand blasting treatment on the surface (inner wall surface) to be sprayed of the pot body 10 by adopting fine iron sand particles to form a surface (Ra is 70-80 mu m) with certain roughness on the surface to be sprayed, and then blowing the residual fine powder particles on the surface of the surface after sanding by using high-pressure airflow;
preheating the surface to be sprayed by using oxygen-acetylene flame, wherein the preheating temperature is about 150-200 ℃, and the preheating time is 2-3 min;
using supersonic plasma arc sprayingThe coating technology is used for preparing the intermediate layer 20 in a region to be sprayed, and the spraying material is nano Cr with the mass fraction of 80 percent2O3And 20% by mass of MgO, both of which have an average particle diameter of 10 to 20 μm, to obtain an intermediate layer 20 having a thickness of 30 to 40 μm. The plasma spraying method comprises the following main process parameters: spraying current is 600A, spraying voltage is 120V, and argon flow is 5-6 m3The nitrogen flow rate is 1.6-2 m3H, hydrogen flow rate of 1-1.5 m3The powder feeding speed is 2-2.5 kg/h, and the spraying distance is 100-120 mm;
the surface of the middle layer 20 is deoiled, degreased and cleaned again, and then dried by low-temperature (100-150 ℃) forced air drying;
and spraying and sintering water-based fluororesin paint which consists of base oil and surface oil and has the total thickness of about 20-30 mu m on the surface of the middle layer 20 to prepare the non-stick coating 30.
In summary, in the pot and the preparation method thereof provided by the embodiments of the invention, the plasma spraying technology is adopted to spray Cr2O3The mixed powder of MgO and MgO is sprayed on the inner wall surface of the pan body 10 to form a nano oxide wear-resistant intermediate layer 20, the surface of the intermediate layer 20 has certain roughness to ensure that the non-stick coating 30 has good bonding force, and the intermediate layer 20 has a compact internal structure, low porosity and Cr2O3The MgO oxide and the non-stick coating 30 have higher hardness and excellent wear resistance and corrosion resistance, and can obviously reduce the deformation of the whole non-stick coating 30 under the action of compressive stress, so that the non-stick coating 30 is not easy to have fatigue damage and fall off caused by long-term stress strain, the fatigue damage degree of the non-stick coating 30 is reduced, and the service life of the whole non-stick coating 30 is obviously prolonged.
In the description of the present invention, the term "plurality" means two or more unless explicitly specified or limited otherwise; the terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, or an electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present specification, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or unit must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily 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.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A cookware, comprising:
a pan body;
the middle layer is attached to the inner wall surface of the pot body, and the components of the middle layer comprise chromium oxide and magnesium oxide; and
the non-stick coating is attached to the layer surface of the middle layer;
the thickness of the intermediate layer is 20-70 μm;
in the mixture for preparing the intermediate layer, the mass fraction of the chromium sesquioxide is 70-90%;
the mass fraction of the magnesium oxide is 30-10%;
wherein the mixture including the chromium oxide and the magnesium oxide is sprayed on an inner wall surface of the pot body by a plasma spraying method to prepare the intermediate layer on the pot body.
2. A method of making a cookware for making the cookware of claim 1, comprising:
spraying a mixture comprising chromium oxide and magnesium oxide on the inner wall surface of a pot body by using a plasma spraying method to prepare an intermediate layer on the pot body;
preparing a non-stick coating on the layer of the intermediate layer;
before preparing the intermediate layer, carrying out sand blasting treatment on the inner wall surface of the pot body;
after the sand blasting treatment, the roughness of the inner wall surface of the pot body is 60-80 μm;
in the mixture, the mass fraction of the chromic oxide is 70-90%;
the mass fraction of the magnesium oxide is 30-10%.
3. The method for manufacturing a pot according to claim 2,
the average grain diameter of the chromic oxide is 10-40 μm; the average grain diameter of the magnesium oxide is 10-40 mu m.
4. The method for manufacturing a pot according to claim 2, further comprising, after the sand blasting and before the manufacturing of the intermediate layer:
and carrying out preheating treatment on the inner wall surface of the pot body, wherein the treatment temperature of the preheating treatment is 150-200 ℃, and the treatment time is 2-3 min.
5. The method of manufacturing a pot according to claim 2 or 3,
the preparation of the non-stick coating on the level of the intermediate layer comprises in particular: and spraying fluororesin paint on the surface of the middle layer to form the non-stick coating.
6. The method for manufacturing a pot as claimed in claim 5, wherein the step of spraying a fluorine resin coating on the surface of the middle layer to form the non-stick coating further comprises:
carrying out degreasing treatment on the intermediate layer;
and drying the degreased middle layer, wherein the drying temperature is 100-200 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108065788A (en) * | 2016-11-11 | 2018-05-25 | 佛山市顺德区美的电热电器制造有限公司 | A kind of antibacterial non-stick material and preparation method thereof and antibacterial non-stick cookware |
| CN108065750B (en) * | 2016-11-14 | 2020-11-24 | 佛山市顺德区美的电热电器制造有限公司 | Manufacturing method of scale mark, non-stick pan and manufacturing method thereof |
| CN108078362A (en) * | 2016-11-23 | 2018-05-29 | 佛山市顺德区美的电热电器制造有限公司 | The preparation method of cookware, cooking apparatus and cookware |
| CN108324081A (en) * | 2017-01-17 | 2018-07-27 | 佛山市顺德区美的电热电器制造有限公司 | Preparation method, cookware and the cooking apparatus of cookware |
| CN108309064A (en) * | 2017-01-17 | 2018-07-24 | 佛山市顺德区美的电热电器制造有限公司 | The preparation method of cooker, cooking apparatus component and cooker |
| CN108618633A (en) * | 2017-03-15 | 2018-10-09 | 佛山市顺德区美的电热电器制造有限公司 | cooker and preparation method thereof |
| CN108720620B (en) * | 2017-04-25 | 2023-11-14 | 佛山市顺德区美的电热电器制造有限公司 | Non-stick coating, preparation method thereof, cooker and cooking equipment |
| CN108937604A (en) * | 2017-05-22 | 2018-12-07 | 佛山市顺德区美的电热电器制造有限公司 | Iron pan and preparation method thereof and cooking apparatus |
| CN109097717B (en) * | 2017-06-20 | 2021-02-26 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic induction heating cooker and preparation method thereof |
| CN109924885A (en) * | 2017-12-15 | 2019-06-25 | 佛山市顺德区美的电热电器制造有限公司 | A kind of heating utensil and preparation method thereof |
| CN110754951B (en) * | 2018-07-27 | 2022-04-12 | 佛山市顺德区美的电热电器制造有限公司 | Coating and cooking device |
| CN112137420B (en) * | 2019-06-28 | 2023-06-20 | 武汉苏泊尔炊具有限公司 | Cooking utensil |
| CN110623550A (en) * | 2019-08-28 | 2019-12-31 | 武汉安在厨具有限公司 | Surface-spray aluminum cast iron kitchen ware and spraying process thereof |
| CN112515461A (en) * | 2020-11-24 | 2021-03-19 | 宁波市金象厨具有限公司 | Method for manufacturing enamel interlayer non-stick pan |
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