CN112617616A - Enamel pot hot-bottom product bottom coating and enamel coating method - Google Patents
Enamel pot hot-bottom product bottom coating and enamel coating method Download PDFInfo
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- CN112617616A CN112617616A CN202011406295.4A CN202011406295A CN112617616A CN 112617616 A CN112617616 A CN 112617616A CN 202011406295 A CN202011406295 A CN 202011406295A CN 112617616 A CN112617616 A CN 112617616A
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- 210000003298 dental enamel Anatomy 0.000 title claims abstract description 69
- 239000002320 enamel (paints) Substances 0.000 title claims abstract description 38
- 238000000576 coating method Methods 0.000 title claims abstract description 30
- 239000011248 coating agent Substances 0.000 title claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000007921 spray Substances 0.000 claims abstract description 20
- 238000005507 spraying Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000005498 polishing Methods 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims abstract description 13
- 239000004744 fabric Substances 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000003973 paint Substances 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 9
- 230000007547 defect Effects 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000002585 base Substances 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- 238000005406 washing Methods 0.000 claims description 19
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 16
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 8
- 239000005751 Copper oxide Substances 0.000 claims description 8
- 229910000431 copper oxide Inorganic materials 0.000 claims description 8
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 8
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 8
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 7
- 239000002987 primer (paints) Substances 0.000 claims description 7
- 239000010963 304 stainless steel Substances 0.000 claims description 6
- 239000005995 Aluminium silicate Substances 0.000 claims description 6
- 239000006004 Quartz sand Substances 0.000 claims description 6
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 6
- 235000012211 aluminium silicate Nutrition 0.000 claims description 6
- 229910021538 borax Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000010438 granite Substances 0.000 claims description 6
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004328 sodium tetraborate Substances 0.000 claims description 6
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000037452 priming Effects 0.000 claims 1
- 230000006698 induction Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 9
- 229910001018 Cast iron Inorganic materials 0.000 description 5
- 238000010009 beating Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 230000003116 impacting effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005488 sandblasting Methods 0.000 description 4
- 230000008719 thickening Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000009982 effect on human Effects 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- 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
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0209—Multistage baking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- 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
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
-
- 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
-
- 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
- C03C2207/00—Compositions specially applicable for the manufacture of vitreous enamels
- C03C2207/08—Compositions specially applicable for the manufacture of vitreous enamels for light metals
Abstract
The invention relates to a method for coating a bottom-coating product and an enamel coating on an enamel pot. Spot welding a covering substrate on an aluminum substrate, heating in a heating tunnel furnace, and covering on a special die on a large-tonnage friction press; polishing the surface of the aluminum substrate of the product to remove surface defects, and then cleaning; spraying enamel paint on the outer surface of the pot body through a spray gun; spraying water paint on the inner surface of the enamel pot; and sequentially polishing the outer surface of the bottom covering sheet by using a cloth wheel and sanding by using a sand bottom machine to obtain the enamel pot hot bottom covering product. The enamel pot obtained by the invention can accelerate the speed and heat of electric heat conduction on an induction cooker, an electric conduction furnace and the like.
Description
Technical Field
The invention relates to a method for coating a bottom-coating product and an enamel coating on an enamel pot.
Background
Enamel pot, also known as enamel coating cast iron pot. Enamel, also called enamel porcelain, is an inorganic glass enamel coated on the surface of a metal base blank. The silicate mineral substance mainly comprising high-strength quartz, feldspar and the like has no toxic or side effect on human bodies. The enamel on the surface of the metal can prevent the metal from rusting, so that the metal cannot form an oxide layer on the surface when being heated, and can resist the corrosion of various liquids, therefore, in the process of cooking food by using the enamel pot, harmful dissolved substances cannot be generated due to high temperature, the acid and alkali resistance is good, and the enamel does not react with the food. The cast iron pan is composed of iron and carbon, and the natural cast iron material is heavier than the common metal material, is the acknowledged best pan material, and has the advantages of fast and uniform heat conduction and good heat preservation. The enamel pot is the perfect combination of natural cast iron materials and high-grade high-quality enamel. The enamel pot is preheated more slowly than a common pot.
Disclosure of Invention
The present invention is directed to solving the above problems in the prior art, and the present invention provides a method for coating enamel coating on the bottom of an enamel pot, which can produce an enamel pot with high preheating and heat conduction speed and high heat conduction energy.
The purpose of the invention can be realized by the following technical scheme: a method for applying a primer and enamel coating to a heat-primed product of an enamel pot, said method comprising the steps of:
s1: spot welding a covering substrate on an aluminum base material, heating in a heating tunnel furnace, then covering on a special die on a large-tonnage friction press, wherein in the process of covering, the middle of the bottom of a product is thinned through the die, the two sides of the product are gradually thickened, the base material generates certain fluidity from the surface, and the surface of the covering substrate has certain roughness, so that the covering substrate and the aluminum base material are firmly covered and integrated to avoid the subsequent falling off through high-temperature heating;
s2: polishing the surface of the aluminum substrate of the product to remove surface defects, then cleaning,
s3: spraying enamel paint on the outer surface of the pot body through a spray gun, wherein the thickness of the enamel paint is 45-55 mu m;
s4: spraying water paint on the inner surface of the enamel pot;
s5: and sequentially polishing the outer surface of the bottom covering sheet by using a cloth wheel and sanding by using a sand bottom machine to obtain the enamel pot hot bottom covering product.
Preferably, in step S1, the surface of the base sheet is blasted with sand by a special blasting machine, and the roughness of the surface of the base sheet is equal to or more than ra 3.0.
Preferably, the bottom covering sheet is stainless steel, and more preferably 304 stainless steel.
Preferably, the temperature in the heating tunnel furnace is 520-560 ℃, and the heating time is 2-5 min.
Preferably, the cleaning in step S2 includes alkali washing, acid washing, hot water washing, and drying.
Preferably, in step S3, the spray gun angle is 5-20 degrees, the distance from the product is 30-60mm, the air gun pressure is 6-8 kg, and the atomization time is 7-8 seconds.
Preferably, the enamel comprises the following components in parts by weight: 120-130 parts of quartz sand, 80-100 parts of medical stone, 80-100 parts of granite, 30-60 parts of kaolin, 10-20 parts of borax, 5-10 parts of copper oxide, 5-10 parts of zinc oxide, 8-15 parts of yttrium oxide and 8-15 parts of zirconium oxide.
More preferably, the weight ratio of copper oxide to zinc oxide in enamel is 1: (1.2-1.5).
More preferably, the weight ratio of yttrium oxide to zirconium oxide in enamel is 1: (1.2-1.5).
Preferably, between step S3 and step S4, the enamel-coated product is beaten and impacted on the soft workpiece to make the enamel coating on the surface flow uniformly.
Preferably, after the spraying of the water-based paint in the step S4 is finished, the water-based paint is sintered and cured at the temperature of 100-130 ℃ for 0.1-0.15 hours, and then sintered at the temperature of 200-250 ℃ for 0.2-0.25 hours.
The covering bottom plate and the aluminum base material white blank pot are spot-welded together by a spot welding machine, heated by a hot tunnel furnace and bonded on a redrawing machine (also a large-tonnage reciprocating stroke), so that the covering bottom plate and the aluminum base material are firmly covered and integrated, and are prevented from falling off by subsequent high-temperature heating. Furthermore, the enamel is made of materials with reasonable compatibility, so that the final enamel pot can accelerate the speed and heat of electric heat conduction on an induction cooker, an electric conduction furnace and the like.
Detailed Description
The following are specific examples of the present invention, which are illustrative of the technical solutions of the present invention and are not intended to limit the present invention.
Example 1
A method for coating enamel coating and a bottom coating of a enamel pot hot bottom product comprises the following steps:
firstly, blowing sand on the surface of the 304 stainless steel bottom covering sheet by using a special sand blasting machine, wherein the roughness of the surface of the bottom covering sheet reaches more than Ra3.0. Spot welding a covering bottom sheet on an aluminum base material, heating the aluminum base material to 540 ℃ in a heating tunnel furnace, heating for 4min, then covering the aluminum base material on a special die on a large-tonnage friction press, thinning the middle of the bottom of the product through the die in the covering process, gradually thickening two sides of the product, enabling the base material to generate certain fluidity from the surface, and enabling the surface of the covering bottom sheet to have certain roughness, so that the covering bottom sheet and the aluminum base material are firmly covered and integrated to form a whole, and avoiding the subsequent falling off through high-temperature heating.
And (3) using a sand wheel machine, similar to a machine arm, installing an abrasive cloth louver wheel to grind back and forth, polishing the bottom covering sheet to remove surface defects, and then carrying out alkali washing, acid washing, hot water washing and drying.
Adjusting the angle of a spray gun to 12 degrees, keeping the distance from the spray gun to the product at 40mm, carrying out air pressure on the spray gun at 7 kg, and spraying the enamel coating on the outer surface of the pot body through the spray gun to form an enamel coating layer with the average film thickness of 50 mu m when atomizing for 7 seconds; the enamel comprises the following components in parts by weight: 125 parts of quartz sand, 90 parts of medical stone, 90 parts of granite, 50 parts of kaolin, 15 parts of borax, 8 parts of copper oxide, 8 parts of zinc oxide, 12 parts of yttrium oxide and 12 parts of zirconium oxide.
And taking out the product from the spraying fixture, beating and impacting the product on a soft workpiece, and enabling the enamel coating on the surface to flow uniformly (leveling).
And spraying 2 layers of water-based paint on the inner surface of the sintered enamel pot.
And sequentially polishing the outer surface of the bottom covering sheet by using a cloth wheel to increase the surface brightness, and sanding the bottom covering sheet cleanly and brightly by using a bottom sanding machine to ensure that the surface is attractive, thereby obtaining the enamel pot hot bottom covering product.
Example 2
A method for coating enamel coating and a bottom coating of a enamel pot hot bottom product comprises the following steps:
firstly, blowing sand on the surface of the 304 stainless steel bottom covering sheet by using a special sand blasting machine, wherein the roughness of the surface of the bottom covering sheet reaches more than Ra3.0. Spot welding a covering bottom sheet on an aluminum base material, heating the aluminum base material to 530 ℃ in a heating tunnel furnace, heating for 3min, then covering the aluminum base material on a special die on a large-tonnage friction press, thinning the middle of the bottom of the product through the die in the covering process, gradually thickening two sides of the product, enabling the base material to generate certain fluidity from the surface, and enabling the surface of the covering bottom sheet to have certain roughness, so that the covering bottom sheet and the aluminum base material are firmly covered and integrated to form a whole, and avoiding the subsequent falling off through high-temperature heating.
And (3) using a sand wheel machine, similar to a machine arm, installing an abrasive cloth louver wheel to grind back and forth, polishing the bottom covering sheet to remove surface defects, and then carrying out alkali washing, acid washing, hot water washing and drying.
Adjusting the angle of a spray gun to 8 degrees, keeping the distance from the spray gun to the product at 50mm, carrying out air pressure on the spray gun at 7 kg, and spraying the enamel coating on the outer surface of the pot body through the spray gun for 8 seconds during atomization to form an enamel coating layer with the thickness of 48 mu m; the enamel comprises the following components in parts by weight: 122 parts of quartz sand, 95 parts of medical stone, 85 parts of granite, 55 parts of kaolin, 12 parts of borax, 6 parts of copper oxide, 7 parts of zinc oxide, 10 parts of yttrium oxide and 12 parts of zirconium oxide.
And taking out the product from the spraying fixture, beating and impacting the product on a soft workpiece, and enabling the enamel coating on the surface to flow uniformly (leveling).
And spraying 2 layers of water-based paint on the inner surface of the sintered enamel pot.
And sequentially polishing the outer surface of the bottom covering sheet by using a cloth wheel to increase the surface brightness, and sanding the bottom covering sheet cleanly and brightly by using a bottom sanding machine to ensure that the surface is attractive, thereby obtaining the enamel pot hot bottom covering product.
Example 3
A method for coating enamel coating and a bottom coating of a enamel pot hot bottom product comprises the following steps:
firstly, blowing sand on the surface of the 304 stainless steel bottom covering sheet by using a special sand blasting machine, wherein the roughness of the surface of the bottom covering sheet reaches more than Ra3.0. Spot welding a covering bottom sheet on an aluminum base material, heating the aluminum base material to 560 ℃ in a heating tunnel furnace, heating for 2min, then covering the aluminum base material on a special die on a large-tonnage friction press, thinning the middle of the bottom of the product through the die in the covering process, gradually thickening two sides of the product, enabling the base material to generate certain fluidity from the surface, and enabling the surface of the covering bottom sheet to have certain roughness, so that the covering bottom sheet and the aluminum base material are firmly covered and integrated to form a whole, and avoiding the subsequent falling off through high-temperature heating.
And (3) using a sand wheel machine, similar to a machine arm, installing an abrasive cloth louver wheel to grind back and forth, polishing the bottom covering sheet to remove surface defects, and then carrying out alkali washing, acid washing, hot water washing and drying.
Adjusting the angle of a spray gun to 5 degrees, keeping the distance from the spray gun to the product to be 30mm, carrying out air pressure on the spray gun to be 6 kilograms, and spraying enamel coating on the outer surface of the pot body through the spray gun to form an enamel coating layer with the thickness of 45 micrometers when atomizing for 7 seconds; the enamel comprises the following components in parts by weight: 130 parts of quartz sand, 80 parts of medical stone, 100 parts of granite, 30 parts of kaolin, 20 parts of borax, 5 parts of copper oxide, 10 parts of zinc oxide, 8 parts of yttrium oxide and 15 parts of zirconium oxide.
And taking out the product from the spraying fixture, beating and impacting the product on a soft workpiece, and enabling the enamel coating on the surface to flow uniformly (leveling).
And spraying 2 layers of water-based paint on the inner surface of the sintered enamel pot.
And sequentially polishing the outer surface of the bottom covering sheet by using a cloth wheel to increase the surface brightness, and sanding the bottom covering sheet cleanly and brightly by using a bottom sanding machine to ensure that the surface is attractive, thereby obtaining the enamel pot hot bottom covering product.
Example 4
A method for coating enamel coating and a bottom coating of a enamel pot hot bottom product comprises the following steps:
firstly, blowing sand on the surface of the 304 stainless steel bottom covering sheet by using a special sand blasting machine, wherein the roughness of the surface of the bottom covering sheet reaches more than Ra3.0. Spot welding a covering bottom sheet on an aluminum base material, heating the aluminum base material to 520 ℃ in a heating tunnel furnace, heating for 5min, then covering the aluminum base material on a special die on a large-tonnage friction press, thinning the middle of the bottom of the product through the die in the covering process, gradually thickening two sides of the product, enabling the base material to generate certain fluidity from the surface, and enabling the surface of the covering bottom sheet to have certain roughness, so that the covering bottom sheet and the aluminum base material are firmly covered and integrated to form a whole, and avoiding the subsequent falling off through high-temperature heating.
And (3) using a sand wheel machine, similar to a machine arm, installing an abrasive cloth louver wheel to grind back and forth, polishing the bottom covering sheet to remove surface defects, and then carrying out alkali washing, acid washing, hot water washing and drying.
Adjusting the angle of a spray gun to 20 degrees, keeping the distance from the product to be 60mm, carrying out air pressure on the spray gun to be 8 kg, and spraying enamel coating on the outer surface of the pot body through the spray gun to form an enamel coating layer with the thickness of 55 mu m when atomizing for 8 seconds; the enamel comprises the following components in parts by weight: 120 parts of quartz sand, 100 parts of medical stone, 80 parts of granite, 60 parts of kaolin, 10 parts of borax, 10 parts of copper oxide, 5 parts of zinc oxide, 15 parts of yttrium oxide and 8 parts of zirconium oxide.
And taking out the product from the spraying fixture, beating and impacting the product on a soft workpiece, and enabling the enamel coating on the surface to flow uniformly (leveling).
And spraying 2 layers of water-based paint on the inner surface of the sintered enamel pot.
And sequentially polishing the outer surface of the bottom covering sheet by using a cloth wheel to increase the surface brightness, and sanding the bottom covering sheet cleanly and brightly by using a bottom sanding machine to ensure that the surface is attractive, thereby obtaining the enamel pot hot bottom covering product.
The enamel pots obtained from the cast iron enamel pots obtained in examples 1 to 4 and commercially available were placed on an induction cooker set at a temperature of 100 ℃ for a heat conduction test.
1. Pouring a little oil which just covers the bottom of the enamel pot into the enamel pot, and testing the time of the oil in the pot for boiling and crunching;
2. 1L of water is poured into the enamel pot, and the water is tested for heating to 100 ℃.
The test results are shown in table 1 below.
In summary, the bottom covering sheet and the aluminum base white blank pot are spot-welded together by a spot welding machine and heated by a hot tunnel furnace, so that the bottom covering sheet and the aluminum base are firmly combined to form a whole, and the subsequent falling off caused by high-temperature heating is avoided. Furthermore, the enamel is made of materials with reasonable compatibility, so that the final enamel pot can accelerate the speed and heat of electric heat conduction on an induction cooker, an electric conduction furnace and the like.
The technical scope of the invention claimed by the embodiments herein is not exhaustive and new solutions formed by equivalent replacement of single or multiple technical features in the embodiments are also within the scope of the invention, and all parameters involved in the solutions of the invention do not have mutually exclusive combinations if not specifically stated.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
Claims (10)
1. A method for applying a primer and enamel coating to a heat-primer product of an enamel pot, said method comprising the steps of:
s1: spot welding a covering substrate on an aluminum base material, heating in a heating tunnel furnace, then covering on a special die on a large-tonnage friction press, wherein in the process of covering, the middle of the bottom of a product is thinned through the die, the two sides of the product are gradually thickened, the base material generates certain fluidity from the surface, and the surface of the covering substrate has certain roughness, so that the covering substrate and the aluminum base material are firmly covered and integrated to avoid the subsequent falling off through high-temperature heating;
s2: polishing the surface of the aluminum substrate of the product to remove surface defects, and then cleaning;
s3: spraying enamel paint on the outer surface of the pot body through a spray gun, wherein the thickness of the enamel paint is 45-55 mu m;
s4: spraying water paint on the inner surface of the enamel pot;
s5: and sequentially polishing the outer surface of the bottom covering sheet by using a cloth wheel and sanding by using a sand bottom machine to obtain the enamel pot hot bottom covering product.
2. The enamel pot bottom-coating and enamel coating method according to claim 1, wherein in step S1, the surface of the bottom-coating piece is blasted with sand by a special blasting machine, and the roughness of the surface of the bottom-coating piece is more than ra 3.0.
3. A method for the application of a primer and enamel coating to an enamel pot hot-bottomed product according to claim 1 or 2, characterised in that the primer sheet is stainless steel, in particular 304 stainless steel.
4. A process for the application of a primer and enamel coating to an enamel pot hot-primed product according to claim 1, characterised in that the temperature in the heating tunnel oven is 520-.
5. The enamel pot bottom-coating and enamel coating method according to claim 1, wherein said washing in step S2 comprises alkali washing, acid washing, hot water washing, and drying.
6. The enamel pot bottom-coating and enamel coating method according to claim 1, wherein the spray gun angle in step S3 is 5-20 degrees, the distance from the product is 30-60mm, the air gun pressure is 6-8 kg, and the atomization time is 7-8 seconds.
7. The enamel pot bottom-coating and enamel coating method according to claim 1, wherein said enamel comprises the following components in parts by weight: 120-130 parts of quartz sand, 80-100 parts of medical stone, 80-100 parts of granite, 30-60 parts of kaolin, 10-20 parts of borax, 5-10 parts of copper oxide, 5-10 parts of zinc oxide, 8-15 parts of yttrium oxide and 8-15 parts of zirconium oxide.
8. A process for coating enamel pot enamel and primer coating according to claim 7, wherein the weight ratio of copper oxide to zinc oxide in the enamel is 1: (1.2-1.5).
9. A process according to claim 7 for coating enamel and enamel on a hot-bottomed product in an enamel pot, wherein the weight ratio of yttrium oxide to zirconium oxide in the enamel is 1: (1.2-1.5).
10. A method for coating enamel coating and priming product on enamel pot according to claim 1, characterized in that after the water paint is sprayed in step S4, it is sintered and cured at 130 ℃ and 100 ℃ for 0.1-0.15 h, and then sintered at 250 ℃ and 200 ℃ for 0.2-0.25 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011406295.4A CN112617616A (en) | 2020-12-02 | 2020-12-02 | Enamel pot hot-bottom product bottom coating and enamel coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011406295.4A CN112617616A (en) | 2020-12-02 | 2020-12-02 | Enamel pot hot-bottom product bottom coating and enamel coating method |
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