阅读说明：本技术 一种珐琅锅热覆底产品覆底和珐琅涂层涂覆方法 (Enamel pot hot-bottom product bottom coating and enamel coating method ) 是由 王成 于 2020-12-02 设计创作，主要内容包括：本发明涉及一种珐琅锅热覆底产品覆底和珐琅涂层涂覆方法。包括将覆底片点焊到铝基材上面,并在加热隧道炉中进行加热,然后在大吨位摩擦压力机上的专用模具上面进行覆合；将产品铝基材表面抛光去除表面缺陷,再进行清洗；将珐琅涂料通过喷枪喷涂到锅体外表面；在珐琅锅内表面喷水性涂料；依次在覆底片外表面用布轮抛光、用砂底机砂光,得珐琅锅热覆底产品。本发明得到的珐琅锅在电磁炉、电导炉上等可以加速电导热的速度和热量。(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.)

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.

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.