TW202028530A - Stainless steel vessel with enamel coating and preparation method thereof - Google Patents

Abstract

The invention discloses a stainless steel vessel with an enamel coating and a preparation method thereof, and belongs to the technical field of stainless steel vessels. The preparation method comprises the following steps: firstly, sandblasting the stainless steel surface of a stainless steel vessel embryo to form a rough surface on the surface of the stainless steel vessel embryo; then, coating the stainless steel surface of the stainless steel vessel embryo with ground coat slurry, specifically, the coating thickness of the ground coat slurry is 60-100 [mu]m; drying and then sintering the stainless steel vessel embryo with the ground coating; coating the surface of the sintered stainless steel vessel embryo with cover coat slurry, specifically, the coating thickness of the cover coat slurry is 170-230 [mu]; and finally, drying and then sintering the stainless steel vessel embryo with the cover coating, and after the sintering is completed, obtaining the target stainless steel vessel. The preparation method is simple, and the enamel coating can adhere more firmly to the surface of the stainless steel alloy.

Description

Stainless steel vessel with enamel coating and preparation method thereof

The invention relates to a stainless steel utensil and a preparation method thereof, in particular to a stainless steel utensil with an enamel coating and a preparation method thereof, and belongs to the technical field of stainless steel utensils.

Existing stainless steel utensils, such as stainless steel heat preservation utensils and stainless steel pots, are made of stainless steel alloy materials. When using stainless steel alloy utensils to hold some carbonated soup or alkaline soup, the acid and salt in it may corrode the inner cavity of the stainless steel alloy and easily release metal ions, which is not good for human health.

The invention patent with publication number CN105862039A discloses a production process of heat-resistant glass and enamel coating for the inner cavity of stainless steel vessels. The process includes the steps of sanding, enamelling, drying and sintering of the embryo body. During the process, an enamel layer is formed on the surface of the inner cavity, and the chemical properties of the enamel layer are relatively stable to prevent corrosion of the stainless steel alloy cavity. However, the stainless steel vessel produced by the production process has a small adhesion of the enamel coating on the stainless steel cavity to the stainless steel cavity, and the enamel coating is not easy to adhere to the stainless steel cavity, which has the problem of unstable adhesion. Moreover, the resistance to acid and alkali is insufficient, and it is easy to produce tea stain or coffee stain on the inner wall.

Aiming at the problems in the prior art, the present invention provides a stainless steel vessel with an enamel coating and a preparation method thereof. The preparation method of the present invention is simple, and can improve the enamel coating in stainless steel. The adhesion on the surface of the steel alloy makes the enamel coating more firmly adhere to the surface of the stainless steel alloy.

In order to achieve the above technical objectives, the technical solution of the present invention is: a method for preparing an enamel-coated stainless steel vessel, including the following steps: (1) Sandblasting: sandblasting the stainless steel surface of the stainless steel vessel embryo body to make the stainless steel vessel embryo The surface of the body forms a rough surface; (2) Underglaze coating: Coating the underglaze slurry on the surface of the stainless steel vessel embryo body, the thickness of the underglaze slurry coating is 60-100μm; (3) Sintering: the step ( 2) The prepared stainless steel vessel body with a primer coating is dried and then sintered; (4) Top glaze coating: coating the top glaze slurry on the bottom sintered in step (3) The surface of the glaze-coated stainless steel vessel embryo body, the coating thickness of the glaze slurry is 170~230μm; (5) Sintering: the stainless steel vessel embryo body with the surface glaze coating prepared in step (4) is dried The sintering operation is performed, and the target stainless steel vessel is obtained after the sintering is completed.

Preferably, after the sandblasting is completed, the surface of the stainless steel vessel embryo body is rinsed with an aqueous solution to remove dust and corundum left by the sandblasting, and then the primer is coated after drying.

Further preferably, the aqueous solution is a mixed aqueous solution of 1-6 g/L soda ash (sodium carbonate) and 0.6-1.4 g/L borax.

Preferably, the coating method described in step (2) or step (4) is dip coating.

Further preferably, the enamel coating step of the inner wall of the stainless steel vessel is as follows: firstly, the stainless steel vessel embryo body is opened upward, the glaze slurry is poured into the inner cavity of the stainless steel vessel embryo body, and the glaze slurry in the stainless steel vessel embryo body is slowly shaken to make the inner wall Glue the glaze paste, and then open the stainless steel vessel embryo body to face Next, let the glaze slurry be evenly distributed on the inner surface of the stainless steel ware embryo body along the edge of the opening of the stainless steel ware embryo body, and shake off the excess glaze slurry. The opening faces upward again and rotate clockwise and counterclockwise back and forth to prevent the opening from accumulating too much glaze.

Preferably, the preparation method of the underglaze slurry described in step (2) is: 100 parts of stainless steel underglaze, 5-9 parts of clay, 0.2~0.5 parts of sodium nitrite, 0.5~0.8 parts of borax, 20~26 parts One part of quartz, 0.8~1 part of adhesive and 60 parts of water are mixed uniformly and then ground, sieved and aged to obtain the primer slurry.

Preferably, the preparation method of the top glaze slurry described in step (4) is: 100 parts of titanium white glaze, 4 to 7 parts of clay, 0.2 to 0.5 parts of sodium nitrite, 0.3 to 0.5 parts of borax, 1 to 5 parts Parts of quartz, 2.5~3.3 parts of white pigment 175 and 0.05~0.15 parts of chrome antimony titanium buff rutile, 0.3~0.5 parts of urea and 45 parts of water are mixed uniformly and then ground, sieved and aged to obtain a glaze slurry material.

Preferably, the drying described in step (2) or step (4) is to dry the base glaze slurry and the top glaze slurry at a temperature of 180 to 230°C until there is no obvious watermark in the The sintering temperature of the sintering operation is 820~835℃, and the sintering time is 5~6 minutes.

Preferably, the sandblasting operation described in step (1) uses 26 mesh corundum as the sandblasting material, the air pressure during sandblasting is 0.6-0.8Mpa, and the sandblasting time is 30-90 seconds.

A stainless steel vessel made by any of the above preparation methods.

As can be seen from the above description, compared with the prior art, the present invention has the following advantages:

1. The present invention adds a base glaze coating step in the preparation process of stainless steel utensils, so that the enamel layer on the prepared stainless steel utensils includes the base glaze layer attached to the surface of the stainless steel and the bottom glaze surface There are two top glaze layers on the surface. The bottom glaze is equivalent to the medium, which can increase the adhesion of the top glaze on the surface of the stainless steel alloy, so that the enamel layer is more firmly attached to the surface of the stainless steel alloy. In addition, the thickness of the bottom glaze is maintained at 60~100μm, the thickness of the top glaze maintained at 170~230μm can ensure a good glazing effect, improve the adhesion stability between the base glaze and the stainless steel surface, the top glaze and the base glaze, and improve the product's acid and alkali resistance.

2. By adding a cleaning step between sandblasting and base glaze coating, the present invention can remove residual dust and corundum on the surface of the embryonic stainless steel, preventing these dust impurities from affecting the adhesion of the base glaze on the surface of the embryonic stainless steel. Further improve the adhesion of the enamel coating on the stainless steel surface of stainless steel utensils, so that the enamel coating adheres to the surface of the stainless steel alloy more firmly;

3. The glaze slurry formula has a great influence on the stability of the glaze slurry and its adhesion on the surface of the embryo body. The present invention can make the preparation of the base glaze slurry and the top glaze slurry through the design and optimization of the composition and dosage. The obtained glaze slurry has good stability and adhesion, which can improve the adhesion stability between the base glaze and the surface of the stainless steel vessel embryo body, the top glaze and the base glaze;

4. By improving the coating method of the glaze slurry on the surface of the stainless steel vessel embryo body, the present invention can make the base glaze slurry and the top glaze slurry adhere uniformly on the surface of the stainless steel vessel embryo body, especially on the inner wall of the stainless steel vessel embryo body. Thereby further improving the adhesion of the enamel coating on the surface of the stainless steel alloy, and can greatly improve the quality of the product;

5. By optimizing the drying conditions, the present invention can speed up the drying speed and ensure the drying effect, thereby improving the quality of the obtained stainless steel utensils; by optimizing the sintering conditions, the sintered effect can be ensured, and the base glaze and the embryo stainless steel can be improved Adhesion stability between the surface, top glaze and base glaze;

6. Sandblasting conditions have an impact on the surface roughness of the embryo body, and the surface roughness of the embryo body will directly affect the surface adhesion of the glaze. When the sandblasting conditions described in the present invention are used, the glaze is on the surface of the stainless steel vessel embryo body. The best adhesion;

7. The present invention can further improve the quality of the stainless steel utensils produced through the steps of supplementary spraying and wiping, and improve the qualification rate of the products.

The following examples are used to further illustrate the characteristics of the present invention, but do not limit the scope of the present invention.

Example 1:

A method for preparing an enamel-coated stainless steel vessel includes the following steps: (1) Sandblasting: sandblasting the stainless steel inner surface of the stainless steel vessel embryo body so that the inner surface of the stainless steel vessel embryo body forms a rough surface; wherein, the sandblasting operation Using 26 mesh corundum as the raw material for sandblasting, the air pressure during sandblasting is 0.7Mpa, and the sandblasting time is 30 seconds; (2) Cleaning and drying: After the sandblasting is completed, the inner surface of the stainless steel vessel embryo is washed with an aqueous solution to remove the dust and corundum left by the sandblasting. Put the stainless steel vessel embryo body into a drying box for drying; wherein, the aqueous solution is preferably a mixed aqueous solution of 3g/L soda ash and 1.2g/L borax; and the stainless steel vessel embryo body is kept facing downward during the cleaning and drying process to prevent Dregs or dust deposits in the air; (3) Underglaze enamelling: coat the underglaze slurry on the inner surface of the stainless steel ware embryo body, the coating thickness of the underglaze slurry is 80μm; The preparation method is as follows: 100 parts (weight parts, the same below) stainless steel base glaze, 7 parts clay, 0.3 parts sodium nitrite, 0.6 parts borax, 23 parts quartz, 0.9 parts adhesive and 60 parts water are mixed uniformly and then ground. , After sieving and aging, the primer slurry is obtained; The coating method of the base glaze slurry is as follows: First, the opening of the stainless steel vessel embryo body is upward, and the base glaze slurry is poured into the stainless steel cavity of the stainless steel vessel embryo body. Slowly shake the glaze slurry in the embryo body to make the inner wall adhere to the glaze slurry. , And then turn the stainless steel vessel embryo body opening downwards, make the glaze slurry evenly distributed on the inner surface of the stainless steel vessel embryo body along the edge of the opening of the stainless steel vessel embryo body, and shake off the excess glaze slurry. After shaking, turn the stainless steel vessel embryo body up again, and rotate it clockwise and counterclockwise to prevent the glaze from being too thick; (4) Sintering: the bottom of step (3) is made at 200℃. The glaze-coated stainless steel ware body is dried until there is no obvious watermark in the base glaze and then sintered. The sintering temperature is 830℃, and the sintering time is 5 minutes; (5) Surface glaze enamelling: coating the surface glaze slurry On the inner surface (inner wall) of the stainless steel vessel blank after sintering in step (3), the coating thickness of the surface glaze slurry is 200 μm; wherein, the preparation method of the surface glaze slurry is: 100 parts (parts by weight, lower Same) Titanium white glaze, 5 parts of clay, 0.3 parts of sodium nitrite, 0.4 parts of borax, 3 parts of quartz, 3 parts of white pigment 175 and 0.10 parts of titanium chrome brown, 0.4 parts of urea and 45 parts of water. After sieving and aging, the surface glaze slurry is obtained; the coating method of the surface glaze slurry is as follows: firstly, the opening of the stainless steel vessel embryo body is upward, and the surface glaze slurry is poured into the inner cavity of the stainless steel vessel embryo body underglaze, and the embryo is slowly shaken The internal glaze slurry makes the inner wall of the glaze slurry adhered, and then the stainless steel vessel embryonic body is opened downwards, and the glaze slurry is evenly distributed on the inner surface of the stainless steel vessel embryonic body along the edge of the opening of the stainless steel vessel embryonic body. Shake to shake off the excess glaze slurry. After shaking, turn the stainless steel vessel embryo body up again, and rotate it clockwise and counterclockwise to prevent the glaze from being too thick; (6) Sintering: at 200°C After drying the stainless steel ware body with the surface glaze coating obtained in step (5) until there is no obvious watermark in the surface glaze, the sintering operation is carried out. The sintering temperature is 830°C, and the sintering time is 5 minutes. Target stainless steel utensils.

Among them, in order to improve the quality of the stainless steel utensils produced, the stainless steel utensil embryos need to be sampled and inspected before sandblasting, and the openings of the stainless steel utensils must be inspected after the base glaze or top glaze is soaked. The bottom needs to be resprayed and a sponge can be used to wipe the excess glaze slurry on the opening of the stainless steel vessel (that is, to wipe the mouth). After the base glaze or the top glaze is fired, it is necessary to check whether the stainless steel utensils are flawed or not. It needs to return to enamel operation (base glaze dip enamel or top glaze dip enamel); a stainless steel vessel with enamel coating made by the above preparation method.

Example 2:

A method for preparing an enamel-coated stainless steel vessel includes the following steps: (1) Sandblasting: sandblasting the stainless steel alloy inner surface of the stainless steel vessel embryo body to form a rough surface on the inner surface of the stainless steel vessel embryo body; wherein, sandblasting The operation uses 26 mesh corundum as the sandblasting material, the air pressure during sandblasting is 0.6Mpa, and the sandblasting time is 60 seconds; (2) Cleaning and drying: After the sandblasting is completed, the inner surface of the stainless steel vessel embryo is rinsed with an aqueous solution to remove the dust and corundum left by the sandblasting. Then put the stainless steel vessel embryo body into a drying box for drying; wherein, the aqueous solution is preferably a mixed aqueous solution of 1g/L soda ash and 0.6g/L borax; and the stainless steel vessel embryo body is kept facing downward during the cleaning and drying process. Prevent falling slag or dust deposition in the air; (3) Underglaze dip enamel: coat the underglaze slurry on the inner surface of the stainless steel ware embryo body, the coating thickness of the underglaze slurry is 60μm; among them, the underglaze slurry The preparation method is: mix 100 parts (parts by weight, the same below) stainless steel base glaze, 5 parts clay, 0.2 parts sodium nitrite, 0.5 parts borax, 20 parts quartz, 0.8 parts adhesive and 60 parts water. After grinding, sieving, and aging, the primer slurry is obtained; the coating method of the primer slurry is as follows: firstly, the opening of the stainless steel vessel embryo body is upward, and the primer slurry is poured into the stainless steel cavity of the stainless steel vessel embryo body. Shake the glaze slurry inside the embryo to make the inner wall stick the glaze slurry, Then the stainless steel vessel embryonic body is opened downwards, and the glaze slurry is evenly distributed on the inner surface of the stainless steel vessel embryonic body along the edge of the opening of the stainless steel vessel embryonic body, and the excess glaze slurry is shaken off by shaking. After finishing, turn the stainless steel vessel embryo body opening upward again, and rotate it clockwise and counterclockwise to prevent the glaze from being too thick; (4) Sintering: the glaze produced in step (3) is sintered at 180℃ After the coated stainless steel ware embryo body is dried until there is no obvious watermark in the base glaze, the sintering operation is carried out. The sintering temperature is 820 ℃, and the sintering time is 5 minutes; (5) Surface glaze enamelling: coating the surface glaze slurry on The inner surface of the stainless steel vessel embryo after sintering in step (3), the coating thickness of the surface glaze slurry is 170 μm; wherein, the preparation method of the surface glaze slurry is: 100 parts (weight parts, the same below) titanium white glaze , 4 parts of clay, 0.2 parts of sodium nitrite, 0.3 parts of borax, 1 part of quartz, 2.5 parts of white pigment 175 and 0.05 parts of titanium chrome brown, 0.3 parts of urea and 45 parts of water are mixed uniformly and then obtained after grinding, sieving and aging Surface glaze slurry; the coating method of the surface glaze slurry is as follows: first, the stainless steel vessel embryo body is opened upward, and the surface glaze slurry is poured into the inner cavity of the stainless steel vessel embryo body underglaze, and the glaze slurry in the embryo body is slowly shaken to make it Paste the glaze slurry on the inner wall, and then turn the stainless steel vessel embryonic body opening downwards, and let the glaze slurry evenly distribute on the inner surface of the stainless steel vessel embryonic body along the edge of the opening of the stainless steel vessel embryonic body and shake it off Excess the glaze slurry, after shaking, turn the stainless steel vessel embryo body up again, and rotate it clockwise and counterclockwise to prevent the glaze from being too thick; (6) Sintering: Step (5) at 180°C The prepared stainless steel vessel body with a surface glaze coating is dried until there is no obvious watermark in the surface glaze, and then the sintering operation is performed. The sintering temperature is 820° C. and the sintering time is 5 minutes. After the sintering is completed, the target stainless steel vessel is obtained.

Among them, in order to improve the quality of the stainless steel utensils produced, the stainless steel utensil embryos need to be sampled and inspected before sandblasting, and the stainless steel utensils need to be inspected after the glaze dipping or top glaze dipping. The opening of the embryo body, if it is found to have a bottom leak, it needs to be sprayed and the excess glaze slurry can be used to wipe the opening of the stainless steel vessel with a sponge (namely wipe the mouth). The stainless steel needs to be inspected after the firing of the base glaze or the top glaze. Whether the ware has defects, it needs to return to enamel operation (base glaze dip enamel or top glaze dip enamel); a stainless steel ware with enamel coating made by the above preparation method.

Example 3:

A method for preparing an enamel-coated stainless steel vessel includes the following steps: (1) Sandblasting: sandblasting the stainless steel alloy inner surface of the stainless steel vessel embryo body to form a rough surface on the inner surface of the stainless steel vessel embryo body; wherein, sandblasting The operation uses 26 mesh corundum as the sandblasting material, the air pressure during sandblasting is 0.8Mpa, and the sandblasting time is 90 seconds; (2) Cleaning and drying: After the sandblasting is completed, the inner surface of the stainless steel vessel embryo is rinsed with an aqueous solution to remove the dust and corundum left by the sandblasting. Then put the stainless steel vessel embryo body into a drying box for drying; wherein, the aqueous solution is preferably a mixed aqueous solution of 6g/L soda ash and 1.4g/L borax; and the stainless steel vessel embryo body is kept facing downward during the cleaning and drying process. Prevent falling slag or dust deposition in the air; (3) Underglaze enamelling: Coat the underglaze slurry on the inner surface of the stainless steel ware embryo body, the coating thickness of the underglaze slurry is 100μm; among them, the underglaze slurry The preparation method is: mix 100 parts (parts by weight, the same below) stainless steel base glaze, 9 parts clay, 0.5 parts sodium nitrite, 0.8 parts borax, 26 parts quartz, 1 part adhesive and 60 parts water. After grinding, sieving, and aging, the primer slurry is obtained; the coating method of the primer slurry is as follows: firstly, the opening of the stainless steel vessel embryo body is upward, and the primer slurry is poured into the stainless steel cavity of the stainless steel vessel embryo body. Shake the glaze slurry in the embryo body to stick the glaze slurry on the inner wall, and then turn the stainless steel ware embryo body opening downwards, and make the glaze slurry evenly distributed on the inner surface of the stainless steel ware embryo body along the edge of the opening of the stainless steel ware embryo body And get rid of the excess by shaking After shaking the glaze slurry, turn the stainless steel vessel embryo body opening upward again, and rotate it clockwise and counterclockwise to prevent the glaze from being too thick; (4) Sintering: the product made in step (3) at 230℃ The stainless steel ware body with the base glaze coating is dried until there is no obvious water mark in the base glaze, and then the sintering operation is carried out. The sintering temperature is 835 ℃, and the sintering time is 6 minutes; The material is coated on the inner surface of the stainless steel vessel embryo after sintering in step (3), the coating thickness of the surface glaze slurry is 230 μm; wherein, the preparation method of the surface glaze slurry is: 100 parts (weight parts, the same below ) Titanium white glaze, 7 parts of clay, 0.5 parts of sodium nitrite, 0.5 parts of borax, 5 parts of quartz, 3.3 parts of white pigment 175 and 0.15 parts of titanium chrome brown, 0.5 parts of urea and 45 parts of water are mixed uniformly and then ground and sieved , The surface glaze slurry is obtained after aging; the coating method of the surface glaze slurry is: firstly, the opening of the stainless steel vessel embryo body is upward, and the surface glaze slurry is poured into the inner cavity of the stainless steel vessel embryo body underglaze, and the embryo body is slowly shaken. The glaze slurry is applied to the inner wall of the glaze slurry, and then the stainless steel vessel embryonic body is opened downwardly, and the glaze slurry is evenly distributed on the inner surface of the stainless steel vessel embryonic body along the edge of the opening of the stainless steel vessel embryonic body. Move and shake off the excess glaze slurry. After shaking, turn the stainless steel vessel embryo body up again, and rotate it clockwise and counterclockwise to prevent the glaze from accumulating too thick; (6) Sintering: sintering at 230℃ In step (5), the stainless steel ware body with the surface glaze coating is dried until there is no obvious watermark in the surface glaze, and then the sintering operation is performed. The sintering temperature is 835°C and the sintering time is 6 minutes. After the sintering is completed, the target is obtained Stainless steel utensils.

Among them, in order to improve the quality of the stainless steel utensils produced, the stainless steel utensil embryos need to be sampled and inspected before sandblasting, and the openings of the stainless steel utensils must be inspected after the base glaze or top glaze is soaked. The bottom needs to be resprayed and a sponge can be used to wipe the excess glaze slurry on the opening of the stainless steel vessel (that is, to wipe the mouth). It needs to be inspected after firing the bottom glaze or the top glaze. Check whether the stainless steel utensils have flaws. If there are flaws, re-enamel operation (base glaze dip enamel or top glaze dip enamel) is required; a stainless steel utensil with enamel coating is made by the above preparation method.

Example 4:

A method for preparing an enamel-coated stainless steel vessel includes the following steps: (1) Sandblasting: sandblasting the stainless steel outer surface of the stainless steel vessel embryo body so that the outer surface of the stainless steel vessel embryo body forms a rough surface; wherein, the sandblasting operation Using 26 mesh corundum as the raw material for sandblasting, the air pressure during sandblasting is 0.7Mpa, and the sandblasting time is 30 seconds; (2) Cleaning and drying: After the sandblasting is completed, the outer surface of the stainless steel vessel embryo is rinsed with an aqueous solution to remove the dust and corundum left by the sandblasting. Put the stainless steel vessel embryo body into a drying box for drying; wherein, the aqueous solution is preferably a mixed aqueous solution of 3g/L soda ash and 1.2g/L borax; and the stainless steel vessel embryo body is kept facing downward during the cleaning and drying process to prevent Dregs or dust deposition in the air; (3) Bottom glaze coating: coat the bottom glaze slurry on the outer surface of the stainless steel vessel embryo by dipping or spray enamelling, and the coating thickness of the bottom glaze slurry is 80 μm; The preparation method of the glaze slurry is: mix 100 parts (weight parts, the same below) stainless steel base glaze, 7 parts clay, 0.3 parts sodium nitrite, 0.6 parts borax, 23 parts quartz, 0.9 parts adhesion agent and 60 parts water. After being evenly ground, sieved, and aging, the primer slurry is obtained; (4) Sintering: the stainless steel vessel body with primer coating prepared in step (3) is dried to the primer at 200°C After there is no obvious watermark, the sintering operation is carried out, the sintering temperature is 830℃, and the sintering time is 5 minutes; (5) Surface glaze coating: the surface glaze slurry is applied by dipping or spraying in step (3) sintering On the outer surface of the stainless steel vessel embryo body, the surface glaze slurry coating thickness is 200μm; among them, the surface glaze The slurry preparation method is: 100 parts (weight parts, the same below) titanium white glaze, 5 parts clay, 0.3 parts sodium nitrite, 0.4 parts borax, 3 parts quartz, 3 parts white pigment 175 and 0.10 parts titanium chrome brown , 0.4 parts of urea and 45 parts of water are evenly mixed, then ground, sieved, and aged to obtain a face glaze slurry; (6) Sintering: the face glaze coating prepared in step (5) is heated at 200°C The stainless steel vessel embryo body is dried until there is no obvious watermark in the surface glaze, and then the sintering operation is performed. The sintering temperature is 830°C and the sintering time is 5 minutes. After the sintering is completed, the target stainless steel vessel is obtained.

Among them, in order to improve the quality of the stainless steel ware produced, it is necessary to sample the stainless steel ware embryo body before sandblasting. After the base glaze or top glaze is coated, the opening of the stainless steel ware embryo body needs to be inspected. The bottom needs to be resprayed and a sponge can be used to wipe the excess glaze slurry on the opening of the stainless steel vessel (that is, to wipe the mouth). After the base glaze or the top glaze is fired, it is necessary to check whether the stainless steel utensils are flawed or not. Enameling operation (dipping or spraying of glaze or surface glaze) is required; a stainless steel vessel with enamel coating is made by the above preparation method.

Example 5:

An enamel-coated stainless steel vessel preparation method, including the following steps: (1) Sandblasting: sandblasting both the stainless steel outer surface and the inner surface (ie outer wall and inner wall) of the stainless steel vessel embryo body, so that the stainless steel vessel embryo body The outer surface and inner surface of the blasting surface are formed as rough surfaces; among them, 26 mesh corundum is used as the blasting material for the sandblasting operation, the air pressure during sandblasting is 0.7Mpa, and the sandblasting time is 30 seconds; (2) Cleaning and drying: After the sandblasting is completed, it is rinsed with an aqueous solution The outer surface and inner surface of the stainless steel vessel embryo body are used to remove the dust and corundum left by sandblasting, and then the stainless steel vessel embryo body is placed in a drying box for drying; wherein, the aqueous solution is preferably 3g/L soda ash and 1.2g/L borax Mixed aqueous solution; and During the cleaning and drying process, the stainless steel ware embryo body should be kept facing downwards to prevent slag or dust deposition in the air; (3) Bottom glaze coating: apply the primer slurry to the stainless steel ware embryo by dipping or spraying The outer surface of the outer body is coated on the inner surface of the stainless steel vessel embryo by spray enamel. The coating thickness of the primer slurry on the outer and inner surfaces of the stainless steel vessel embryo is 80μm; wherein the preparation method of the primer slurry is: 100 parts (Parts by weight, the same below) Stainless steel base glaze, 7 parts of clay, 0.3 parts of sodium nitrite, 0.6 parts of borax, 23 parts of quartz, 0.9 parts of adhesive and 60 parts of water are mixed uniformly and then ground, sieved and aged. Bottom glaze slurry; (4) Sintering: the stainless steel ware body with primer coating prepared in step (3) is dried at 200°C until there is no obvious watermark in the glaze, and then the sintering operation is performed. The temperature is 830℃, and the sintering time is 5 minutes; (5) Surface glaze coating: The surface glaze slurry is coated on the outer surface of the stainless steel ware body after step (3) sintering by dip enamel or spray enamel, and Spray enamel coating on the inner surface of the stainless steel vessel embryo. The coating thickness of the surface glaze slurry on the outer surface and the inner surface of the stainless steel vessel embryo is 200μm. The preparation method of the surface glaze slurry is: 100 parts (weight parts, The same below) Titanium white glaze, 5 parts of clay, 0.3 parts of sodium nitrite, 0.4 parts of borax, 3 parts of quartz, 3 parts of white pigment 175 and 0.10 parts of titanium chrome brown, 0.4 parts of urea and 45 parts of water. After sieving and aging, the surface glaze slurry is obtained; (6) Sintering: drying the stainless steel ware body with the surface glaze coating prepared in step (5) at a temperature of 200 ℃ until there is no obvious watermark in the surface glaze Afterwards, a sintering operation was performed, the sintering temperature was 830° C., and the sintering time was 5 minutes. After sintering, the target stainless steel vessel was obtained.

Among them, in order to improve the quality of the stainless steel utensils produced, the stainless steel utensil embryos need to be sampled and inspected before sandblasting, and the stainless steel utensils need to be inspected after the primer or top glaze is coated. The opening of the embryo body, if it is found to have a bottom leak, it needs to be sprayed and the excess glaze slurry can be used to wipe the opening of the stainless steel vessel with a sponge (namely wipe the mouth). The stainless steel needs to be inspected after the firing of the base glaze or the top glaze. Whether the ware has flaws, it needs re-enabling operation (primer glaze coating or top glaze coating) if there are flaws; a stainless steel ware with enamel coating made by the above preparation method.

Example 6:

An enamel-coated stainless steel vessel preparation method, including the following steps: (1) Sandblasting: sandblasting both the stainless steel outer surface and the inner surface (ie outer wall and inner wall) of the stainless steel vessel embryo body, so that the stainless steel vessel embryo body The outer surface and inner surface of the blasting surface are formed as rough surfaces; among them, 26 mesh corundum is used as the blasting material for the sandblasting operation, the air pressure during sandblasting is 0.7Mpa, and the sandblasting time is 30 seconds; (2) Cleaning and drying: After the sandblasting is completed, it is rinsed with an aqueous solution The outer surface and inner surface of the stainless steel vessel embryo body are used to remove the dust and corundum left by sandblasting, and then the stainless steel vessel embryo body is placed in a drying box for drying; wherein, the aqueous solution is preferably 3g/L soda ash and 1.2g/L borax Mixed aqueous solution; and the stainless steel vessel embryo body is kept facing down during the cleaning and drying process to prevent slag or dust deposition in the air; (3) Underglaze coating: the underglaze slurry is coated by dipping or spraying The outer surface of the stainless steel ware embryo is coated on the inner surface of the stainless steel ware embryo by dipping enamel. The coating thickness of the primer slurry on the outer surface and the inner surface of the stainless steel ware embryo is both 80 μm; wherein, the preparation method of the primer slurry is ：Mix 100 parts (parts by weight, the same below) stainless steel base glaze, 7 parts clay, 0.3 parts sodium nitrite, 0.6 parts borax, 23 parts quartz, 0.9 parts adhesive and 60 parts water, then ground and sieved. , After aging, the primer slurry is obtained; when the primer slurry is coated on the inner surface of the stainless steel vessel embryo, the stainless steel With the opening of the ware embryo body facing upward, pour the bottom glaze slurry into the stainless steel cavity of the stainless steel ware embryo body. Slowly shake the glaze slurry in the embryo body to make the inner wall stick the glaze slurry, and then turn the stainless steel ware embryo body opening downwards along The edge of the opening of the stainless steel vessel embryo body allows the glaze slurry to be evenly distributed on the inner surface of the stainless steel vessel embryo body, and the excess of the glaze slurry is shaken off by shaking, and the opening of the stainless steel vessel embryo body is turned upward again after shaking. Rotate clockwise and counterclockwise back and forth to prevent the glaze from being too thick; (4) Sintering: Dry the stainless steel ware body with the base glaze coating prepared in step (3) at a temperature of 200 ℃ to the base glaze After there is no obvious watermark, the sintering operation is carried out, the sintering temperature is 830℃, and the sintering time is 5 minutes; (5) Surface glaze coating: the surface glaze slurry is applied by dipping or spraying in step (3) sintering The outer surface of the stainless steel ware embryo body is coated on the inner surface of the stainless steel ware embryo body by dipping enamel. The coating thickness of the surface glaze slurry on the outer surface and the inner surface of the stainless steel ware embryo body is both 200 μm; The preparation method is: 100 parts (weight parts, the same below) titanium white glaze, 5 parts clay, 0.3 parts sodium nitrite, 0.4 parts borax, 3 parts quartz, 3 parts white pigment 175 and 0.10 parts titanium chrome brown, 0.4 parts Urea and 45 parts of water are evenly mixed and ground, sieved, and aged to obtain a face glaze slurry; when the face glaze slurry is coated on the inner surface of the stainless steel ware embryo body, the opening of the stainless steel ware embryo body is firstly opened, and the surface glaze slurry Pour the material into the stainless steel cavity of the stainless steel vessel embryo body, slowly shake the glaze slurry inside the embryo body to make the inner wall of the glaze slurry adhere to the glaze slurry, and then turn the stainless steel vessel embryo body opening downward, and let the The glaze slurry is evenly distributed on the inner surface of the stainless steel vessel embryo body and the excess of the glaze slurry is shaken off by shaking. After the shaking, the stainless steel vessel embryo body opening faces upward again, and rotates clockwise and counterclockwise back and forth to prevent the cup opening The glaze is too thick; (6) Sintering: the stainless steel ware body with the surface glaze coating prepared in step (5) is dried at a temperature of 200°C until there is no obvious watermark in the surface glaze, and then the sintering operation is performed. The sintering temperature is 830°C. The sintering time is 5 minutes, and the target stainless steel vessel is obtained after the sintering is completed.

Among them, in order to improve the quality of the stainless steel ware produced, it is necessary to sample the stainless steel ware embryo body before sandblasting. After the base glaze or top glaze is coated, the opening of the stainless steel ware embryo body needs to be inspected. The bottom needs to be resprayed and a sponge can be used to wipe the excess glaze slurry on the opening of the stainless steel vessel (that is, to wipe the mouth). After the base glaze or the top glaze is fired, it is necessary to check whether the stainless steel utensils are flawed or not. Enameling operation (primer glaze coating or top glaze coating) is needed; a stainless steel vessel with enamel coating is prepared by the above preparation method.

In addition, in the foregoing embodiments, the present invention involves performing at least two glaze coating and at least two sintering and a specific thickness of the glaze (the coating thickness of the primer slurry in the foregoing step 2 is 60-100 μm). m, etc., and the above-mentioned step 4, the coating thickness of the surface glaze slurry is 170~230 μm, etc.) to achieve the aforementioned unpredictable technical effect of the invention.

It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effect; as long as the requirements for use are met, it is within the protection scope of the present invention.

Claims (10)

A method for preparing an enamel-coated stainless steel vessel includes the following steps: Step (1) Sandblasting: sandblasting a stainless steel surface of a stainless steel vessel embryo body so that the stainless steel surface of the stainless steel vessel embryo body forms a stainless steel surface Rough surface; step (2) primer coating: coating a primer slurry on the stainless steel surface of the stainless steel vessel embryo, the coating thickness of the primer slurry is 60-100 μm; step (3) sintering: After drying a stainless steel ware body with a base glaze coating prepared in step (2), sintering is performed; step (4) surface glaze coating: a surface glaze slurry is applied after step (3) sintering On a surface of the stainless steel vessel body with a primer coating, the coating thickness of the glaze slurry is 170~230μm; step (5) sintering: sintering the surface glaze coating prepared in step (4) After the stainless steel vessel embryo body is dried, a sintering operation is performed, and a target stainless steel vessel is obtained after the sintering is completed. The method for preparing an enamel-coated stainless steel vessel as described in item 1 of the scope of patent application, wherein after the sandblasting is completed, the stainless steel vessel embryo body is rinsed with an aqueous solution to remove the dust and corundum left by the sandblasting, and then it is baked After drying, apply the primer. According to the method for preparing an enamel-coated stainless steel vessel as described in item 2 of the scope of patent application, the aqueous solution is a mixed aqueous solution of 1-6 g/L soda ash and 0.6-1.4 g/L borax. The method for preparing an enamel-coated stainless steel vessel as described in item 1 of the scope of patent application, wherein the coating method in this step (2) or this step (4) is dip coating. According to the method for preparing an enamel-coated stainless steel vessel as described in item 4 of the scope of patent application, the step of coating the inner wall of the stainless steel vessel embryo body is as follows: firstly, the opening of the stainless steel vessel embryo body faces , Pour a glaze slurry into the inner cavity of the stainless steel vessel embryo body, and shake it slowly The glaze slurry in the stainless steel vessel embryonic body makes the inner wall of the glaze slurry adhere to the glaze slurry, and then the opening of the stainless steel vessel embryonic body faces downward, and the glaze slurry is evenly distributed on the edge of the opening of the stainless steel vessel embryonic body. The inner surface of the stainless steel vessel embryo body is shaken to shake off the excess glaze slurry. After shaking, the opening of the stainless steel vessel embryo body faces upward again, and rotate clockwise and counterclockwise back and forth to prevent the opening of the glaze from being too thick . The method for preparing an enamel-coated stainless steel vessel as described in item 1 of the scope of patent application, wherein the method for preparing the primer slurry described in this step (2) is: adding 100 parts of stainless steel primer, 5 ~9 parts of clay, 0.2~0.5 parts of sodium nitrite, 0.5~0.8 parts of borax, 20~26 parts of quartz, 0.8~1 parts of adhesive and 60 parts of water are mixed uniformly and then ground, sieved and aged to obtain the bottom Glaze slurry. The method for preparing an enamel-coated stainless steel vessel as described in item 1 of the scope of patent application, wherein the method for preparing the glaze slurry described in this step (4) is: adding 100 parts of titanium white glaze, 4 ~7 parts of clay, 0.2~0.5 parts of sodium nitrite, 0.3~0.5 parts of borax, 1~5 parts of quartz, 2.5~3.3 parts of white pigment 175 and 0.05~0.15 parts of titanium chrome brown, 0.3~0.5 parts of urea and 45 parts of water After being evenly mixed, the surface glaze slurry is obtained after grinding, sieving and aging. The method for preparing an enamel-coated stainless steel vessel as described in the first item of the scope of patent application, wherein the drying described in this step (2) or this step (4) is to heat the ware at a temperature of 180~230℃ The base glaze slurry and the top glaze slurry are dried until there is no obvious watermark, the sintering temperature of the sintering operation is 820-835°C, and the sintering time is 5-6 minutes. The method for preparing an enamel-coated stainless steel vessel as described in item 1 of the scope of patent application, wherein the sandblasting operation described in step (1) uses 26 mesh corundum as the sandblasting raw material, and the air pressure during sandblasting is 0.6~0.8Mpa , Sandblasting time is 30~90 seconds. A kind of enamel prepared by the preparation method described in any one of the scope of patent application 1 to 9 Lang-coated stainless steel utensils.