CN116732518A - Etching treatment process for surface patterns of special-shaped multi-surface aluminum material - Google Patents

Abstract

The present invention relates to the technical field of metal surface etching processing, and specifically to a special-shaped multi-faceted aluminum material surface pattern etching processing process. It includes the following steps: after applying UV ink coating to the surface of the aluminum alloy profile, place the printing surface of the profile upward in the UV printing area; set the value on the computer of the printing device, select the printing pattern, and start printing to form the etching pattern texture Protective layer: place the profile in an alkaline water tank and etch the profile through alkali etching until an etching pattern is produced on the surface of the profile; soak the profile in an acid solution to remove the etching pattern texture protective layer and then color it to complete the surface treatment. In the present invention, all four nozzles of the UV printer are changed to white, and the titanium dioxide added to the white ink is quickly accumulated through back-and-forth inkjet printing to form an etching protective film with an effective depth, thereby laying a key foundation for etching.

Description

A surface pattern etching process for special-shaped multi-faceted aluminum materials

Technical field

The present invention relates to the technical field of metal surface etching processing, and specifically to a special-shaped multi-faceted aluminum material surface pattern etching processing process.

Background technique

Aluminum alloy is the most widely used non-ferrous metal structural material in industry. It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries. With the rapid development of industrial economy, the demand for aluminum alloy welded structural parts is increasing. The increase in the number of years has led to in-depth research on the weldability of aluminum alloys. At present, aluminum alloys are the most widely used alloys. The main characteristics of aluminum alloy furniture are that they are light and tough, have a more beautiful luster than steel furniture, and have strong rust resistance. As a surface decoration for chair frames or cabinet doors, it can give people a very comfortable tactile feel.

Aluminum alloy furniture profiles are aluminum alloy materials with a certain geometric shape made from aluminum alloy and materials with certain strength and toughness through rolling, extrusion, casting and other processes. This type of material has a certain appearance size and a certain cross-section shape. , with certain mechanical and physical properties, aluminum alloy furniture profiles are an important raw material for manufacturing aluminum alloy furniture. People are increasingly fond of minimalist decoration styles, and the aesthetic requirements for aluminum alloy profiles and components in the field of furniture applications are also increasing. The higher, but the existing aluminum alloy doors, windows and furniture components have a single surface treatment. Apart from coloring, there is no pattern decoration, which looks monotonous and has no texture. However, traditional technology can only achieve flat screen printing and etching, and can only print flat plates. Three-dimensional, irregular and concave profile products, that is, special-shaped multi-faceted aluminum materials, cannot be processed and textured aluminum surface patterns cannot be made. Therefore, a special-shaped multi-faceted aluminum surface pattern with pattern depth and specific and beautiful patterns is proposed. Etching process.

Contents of the invention

The purpose of the present invention is to provide a surface pattern etching process for special-shaped multi-faceted aluminum materials to solve the problems raised in the above background technology.

In order to achieve the above objectives, the purpose of the present invention is to provide a surface pattern etching process for special-shaped multi-faceted aluminum materials, which includes the following steps:

S1. After applying UV ink coating to the surface of the aluminum alloy profile, place the printed surface of the profile facing up in the UV printing area;

S2. Set the numerical value on the computer of the printing device, select the printing pattern, and start printing to form the etching pattern texture protective layer;

S3. Place the profile in an alkaline water tank and etch the profile through alkali etching until etching patterns appear on the surface of the profile;

S4. Soak the profile in the acid solution, remove the etching pattern texture protective layer, and then color to complete the surface treatment.

As a further improvement of this technical solution, in S1, the coating is even and dust-free when applied, and the thickness of the coating ranges from 3 to 15 μm.

As a further improvement of this technical solution, in S1, a UV printing device with four white ribbons is used for UV printing. When placing, the printing surface of the special-shaped multi-faceted aluminum material is placed upward, and the printed surface of the special-shaped multi-faceted aluminum material is placed facing up. Specific brackets are placed underneath for support.

As a further improvement of this technical solution, in S2, before printing, wipe the excess ink from the nozzle, then test the height of the profile, set the same value on the computer of the printing device, select the printed pattern, start printing, and spray ink back and forth. The white pigment is deposited to form a protective layer of etched pattern texture. The temperature setting range during printing is 40-50°C.

As a further improvement of this technical solution, in the S2, the thickness of the etching pattern texture protective layer ranges from 0.25 to 0.65 mm.

As a further improvement of this technical solution, in the S3, the solution ratio in the alkali water tank is 65%-75% water, 15%-20% sodium hydroxide, and 15%-20% sodium nitrate.

As a further improvement of this technical solution, in S3, the temperature in the alkali water tank is maintained at 45-55°C, and the soaking time ranges from 30-60 minutes.

As a further improvement of this technical solution, in the S4, the acid solution ratio is 60% water, 10% nitric acid, 10% sulfuric acid, and 20% hydrofluoric acid.

As a further improvement of this technical solution, in S4, the temperature range during immersion in the acid solution is 80-120°C, and the immersion time range is 6-15 minutes.

As a further improvement of this technical solution, in S4, the coloring includes oxidation coloring and paint coloring.

In the present invention, the inkjet color of the four nozzles of the UV printer is changed to white, and titanium dioxide is added to the white ink, which can effectively achieve rapid accumulation through back-and-forth inkjet printing to form an etching protective film with an effective depth. , which lays a key foundation for etching. The natural oxide film on the surface of the aluminum alloy profile is first removed through the alkaline water tank solution to obtain a clean aluminum alloy matrix. The aluminum alloy matrix is then etched to produce grooves on the surface of the aluminum alloy matrix to form The required depth of the beautiful pattern is then soaked in acid solution and heated at high temperature to remove the protective layer of etched pattern texture remaining on the surface of the profile. Finally, the surface treatment of the profile is completed through oxidation coloring and paint coloring to produce a pattern with depth and a specific and beautiful pattern. aluminum surface pattern.

Compared with the existing technology, the beneficial effects of the present invention are:

1. In the special-shaped multi-faceted aluminum surface pattern etching process, all four nozzles of the UV printer are changed to white, and the titanium dioxide added to the white ink is used to quickly accumulate through back-and-forth inkjet printing to form an effective depth of etching. The protective film lays a key foundation for etching.

2. In the surface pattern etching process of special-shaped multi-faceted aluminum materials, the natural oxide film on the surface of the aluminum alloy profile is first removed through the alkaline water tank solution to obtain a clean aluminum alloy matrix, and then the aluminum alloy matrix is etched. Creates grooves that create the depth needed for a beautiful pattern.

Description of drawings

Figure 1 is a flow chart of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figure 1. The purpose of this embodiment is to provide a surface pattern etching process for special-shaped multi-faceted aluminum materials, which includes the following steps:

S1. After applying UV ink coating to the surface of the aluminum alloy profile, place the profile with the printing side facing up in the UV printing area. The application should be even and dust-free, and the thickness of the coating ranges from 3-15 μm. Wipe off the profile surface. The dust, oil stains, etc. make the combination between the ink and the profile stronger. At the same time, the stains avoid the problem of non-coloring or drawing of the ink during printing. When UV printing, a UV printing device with four white ribbons is used, and the white ink The ingredients contain titanium dioxide. The properties of titanium dioxide are easy to accumulate. When placing, place the printed side of the special-shaped multi-faceted aluminum material upwards, and place a specific bracket (a block customized according to the product situation) under the special-shaped multi-faceted aluminum material to support it. , to keep the printing surface flat;

S2. Set the value on the computer of the printing device, select the print pattern, and start printing to form the protective layer of etched pattern texture. Before printing, wipe the excess ink from the nozzle, and then test the height of the profile. Set the same value on the computer of the printing device and select the printed pattern. Pattern, start printing, and accumulate white pigment by inkjet back and forth (ideally 6 times) to form an etching pattern texture protective layer. The temperature setting range during printing is 40-50°C, and the thickness of the etching pattern texture protective layer The range is 0.25-0.65mm. If the thickness of the protective layer is too thin, it will affect the protective effect of the pattern texture. Through the above process, according to the profile pattern preset by the computer, a mold opening protective layer is printed on the smooth profile. The protective layer has a certain The thickness is ready for the next step of etching on the product surface;

S3. Place the profile in an alkali water tank and etch the profile through alkali etching until etching patterns are produced on the surface of the profile. The solution ratio in the alkali water tank is 65%-75% water and 15%-20% sodium hydroxide. Sodium nitrate 15%-20%, and the temperature in the alkaline water tank is maintained at 45-55°C. The soaking time range is 30-60 minutes. The natural oxide film on the surface of the aluminum alloy profile is first removed through the alkaline water tank solution to obtain a clean aluminum alloy matrix. , and then etching the aluminum alloy substrate to produce grooves on the surface of the aluminum alloy substrate to form the depth required for beautiful patterns;

S4. Soak the profile in an acid solution, remove the etching pattern texture protective layer and then color it to complete the surface treatment. The acid solution ratio is 60% water, 10% nitric acid, 10% sulfuric acid, 20% hydrofluoric acid. The temperature range during soaking is 80-120℃, and the soaking time range is 6-15 minutes. The residual etching pattern texture protective layer on the surface of the profile can be removed by soaking in acid solution and heating at high temperature. The coloring includes oxidation coloring and paint coloring. Oxidation coloring After surface pretreatment of the profile, an anodizing reaction occurs on the surface of the profile to form a dense and porous oxide film layer. The paint is colored by using inorganic or organic paint to adsorb on the top of the micropores of the oxide film. The color is the color of the dye itself.

In the present invention, the inkjet color of the four nozzles of the UV printer is changed to white, and titanium dioxide is added to the white ink, which can effectively achieve rapid accumulation through back-and-forth inkjet printing to form an etching protective film with an effective depth. , which lays a key foundation for etching. The natural oxide film on the surface of the aluminum alloy profile is first removed through the alkaline water tank solution to obtain a clean aluminum alloy matrix. The aluminum alloy matrix is then etched to produce grooves on the surface of the aluminum alloy matrix to form The required depth of the beautiful pattern is then soaked in acid solution and heated at high temperature to remove the protective layer of etched pattern texture remaining on the surface of the profile. Finally, the surface treatment of the profile is completed through oxidation coloring and paint coloring to produce a pattern with depth and a specific and beautiful pattern. aluminum surface pattern.

According to the differences in process parameters during the process, the special-shaped multi-faceted aluminum material surface pattern etching process provided by the present invention will be further explained through the following specific examples.

Example 1

S1. After applying UV ink coating to the surface of the aluminum alloy profile, place the profile with the printing surface facing up in the UV printing area. The application should be even and dust-free, and the thickness of the coating should be 15 μm, and four UV ink coatings should be used for UV printing. For UV printing equipment whose ribbons are all white, place the printed surface of the special-shaped multi-faceted aluminum material upwards, and place a specific bracket under the special-shaped multi-faceted aluminum material to support it so that the printing surface remains flat;

S2. Set the value on the computer of the printing device, select the print pattern, and start printing to form the protective layer of etched pattern texture. Before printing, wipe the excess ink from the nozzle, and then test the height of the profile. Set the same value on the computer of the printing device and select the printed pattern. To start printing the pattern, the white pigment is accumulated by inkjet back and forth to form an etched pattern texture protective layer. The temperature during printing is set to 40°C, and the thickness of the etched pattern texture protective layer is 0.65mm;

S3. Place the profile in an alkali water tank and etch the profile through alkali etching until etching patterns are produced on the surface of the profile. The solution ratio in the alkali water tank is 65%-75% water and 15%-20% sodium hydroxide. Sodium nitrate 15%-20%, and the temperature in the alkali water tank is maintained at 45°C, and the soaking time is 60 minutes;

S4. Soak the profile in an acid solution, remove the etching pattern texture protective layer and then color it to complete the surface treatment. The acid solution ratio is 60% water, 10% nitric acid, 10% sulfuric acid, 20% hydrofluoric acid. The temperature during soaking is 80°C, the soaking time is 15 minutes, and the coloring includes oxidation coloring and paint coloring.

Example 2

S1. After applying UV ink coating to the surface of the aluminum alloy profile, place the profile with the printing surface facing up in the UV printing area. The application should be even and dust-free, and the thickness of the coating should be 10 μm, and four UV ink coatings should be used for UV printing. For UV printing equipment whose ribbons are all white, place the printed surface of the special-shaped multi-faceted aluminum material upwards, and place a specific bracket under the special-shaped multi-faceted aluminum material to support it so that the printing surface remains flat;

S2. Set the value on the computer of the printing device, select the print pattern, and start printing to form the protective layer of etched pattern texture. Before printing, wipe the excess ink from the nozzle, and then test the height of the profile. Set the same value on the computer of the printing device and select the printed pattern. To start printing the pattern, the white pigment is accumulated by inkjet back and forth to form an etching pattern texture protective layer. The temperature is set to 45°C during printing, and the thickness of the etching pattern texture protective layer is 0.40mm;

S3. Place the profile in an alkali water tank and etch the profile through alkali etching until etching patterns are produced on the surface of the profile. The solution ratio in the alkali water tank is 65%-75% water and 15%-20% sodium hydroxide. Sodium nitrate 15%-20%, and the temperature in the alkali water tank is maintained at 50°C, and the soaking time is 45 minutes;

S4. Soak the profile in an acid solution, remove the etching pattern texture protective layer and then color it to complete the surface treatment. The acid solution ratio is 60% water, 10% nitric acid, 10% sulfuric acid, 20% hydrofluoric acid. The temperature during soaking is 100°C, the soaking time is 10 minutes, and the coloring includes oxidation coloring and paint coloring.

Example 3

S1. After applying UV ink coating to the surface of the aluminum alloy profile, place the profile with the printing surface facing up in the UV printing area. The application should be even and dust-free, and the thickness of the coating should be 3 μm, and four UV ink coatings should be used for UV printing. For UV printing equipment whose ribbons are all white, place the printed surface of the special-shaped multi-faceted aluminum material upwards, and place a specific bracket under the special-shaped multi-faceted aluminum material to support it so that the printing surface remains flat;

S2. Set the value on the computer of the printing device, select the print pattern, and start printing to form the protective layer of etched pattern texture. Before printing, wipe the excess ink from the nozzle, and then test the height of the profile. Set the same value on the computer of the printing device and select the printed pattern. To start printing the pattern, the white pigment is accumulated by inkjet back and forth to form an etched pattern texture protective layer. The temperature during printing is set to 50°C, and the thickness of the etched pattern texture protective layer is 0.25mm;

S3. Place the profile in an alkali water tank and etch the profile through alkali etching until etching patterns are produced on the surface of the profile. The solution ratio in the alkali water tank is 65%-75% water and 15%-20% sodium hydroxide. Sodium nitrate 15%-20%, and the temperature in the alkali water tank is maintained at 55°C, and the soaking time is 30 minutes;

S4. Soak the profile in an acid solution, remove the etching pattern texture protective layer and then color it to complete the surface treatment. The acid solution ratio is 60% water, 10% nitric acid, 10% sulfuric acid, 20% hydrofluoric acid. The temperature during soaking is 120°C, the soaking time is 6 minutes, and the coloring includes oxidation coloring and paint coloring.

Comparison of process parameters in Table 1 Examples 1-3

Comparative example 1

This comparative example is based on Example 1, with the coating thickness set to 20 μm, and the rest remaining unchanged. The specific steps are similar to Example 1, and will not be described again in this comparative example.

Comparative example 2

This comparative example is based on Example 2. The printing temperature is set to 30°C, and the other steps remain unchanged. The specific steps are similar to Example 2, and will not be described again in this comparative example.

Comparative example 3

In this comparative example, based on Example 3, the thickness of the protective layer is set to 0.80 mm, and the rest are unchanged. The specific steps are similar to Example 3, and will not be described again in this comparative example.

Comparison of process parameters in Table 2 Comparative Examples 1-3

Comparative example 4

This comparative example is based on Example 2. The temperature of the alkali water tank is set to 60°C, and the other steps remain unchanged. The specific steps are similar to Example 2, and will not be described again in this comparative example.

Comparative example 5

In this comparative example, based on Example 2, the soaking time in the alkali water tank is set to 75 minutes, and the other steps remain unchanged. The specific steps are similar to Example 2, and will not be described again in this comparative example.

Comparison of process parameters in Table 3 Comparative Examples 4-5

Comparative example 6

This comparative example is based on Example 3. The acid solution immersion temperature is set to 60°C, and the other steps remain unchanged. The specific steps are similar to Example 3, and will not be described again in this comparative example.

Comparative example 7

In this comparative example, based on Example 3, the soaking time in the acid solution is set to 20 minutes, and the other steps remain unchanged. The specific steps are similar to Example 3, and will not be described again in this comparative example.

Comparison of process parameters in Table 4 Comparative Examples 6-7

Test example

The profile surface was treated according to a special-shaped multi-faceted aluminum surface pattern etching process provided in Examples 1-3 and Comparative Examples 1-7 respectively, and hundreds of volunteers were randomly selected to evaluate the appearance of the treated profiles. The scoring standards were as follows Table 5, record and calculate the average score and fill in Table 6.

Table 5 Scoring Criteria

Appearance standards Fraction The pattern is three-dimensional and has obvious depth and concavity. 5 The pattern is blurry but the depth is obvious 4 The pattern is blurry and there is no depth change in the pattern plane. 3

Table 6 Comparison of profile appearance scores between Examples and Comparative Examples

Average score Example 1 4.61 Example 2 4.73 Example 3 4.66 Comparative example 1 4.43 Comparative example 2 4.51 Comparative example 3 4.53 Comparative example 4 4.57 Comparative example 5 4.48 Comparative example 6 4.45 Comparative example 7 4.52

According to Table 6, it can be seen that compared with Examples 1-3 and Comparative Examples 1-7, the average score of the appearance of the profiles treated in the Examples is higher than the average score of the appearance of the profiles treated in the Comparative Examples, and the appearance of the profiles treated in the Examples The average scores of the profiles are all higher than 4.61, while the average scores of the appearance of the profiles treated with the comparative examples of different process parameters are all reduced. Therefore, the special-shaped multi-faceted aluminum surface pattern etching process provided by the present invention can produce patterns with Deep, detailed and beautiful aluminum surface patterns.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Under the premise, there will be various changes and improvements in the present invention, and these changes and improvements all fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A special-shaped multi-faceted aluminum surface pattern etching process, which is characterized by including the following steps: S1. After applying UV ink coating to the surface of the aluminum alloy profile, place the printed surface of the profile facing up in the UV printing area; S2. Set the numerical value on the computer of the printing device, select the printing pattern, and start printing to form the etching pattern texture protective layer; S3. Place the profile in an alkaline water tank and etch the profile through alkali etching until etching patterns appear on the surface of the profile; S4. Soak the profile in the acid solution, remove the etching pattern texture protective layer, and then color to complete the surface treatment. 2. The special-shaped multi-faceted aluminum material surface pattern etching process according to claim 1, characterized in that: in S1, the coating is uniform and dust-free when applied, and the thickness of the coating ranges from 3-15 μm. 3. The special-shaped multi-faceted aluminum surface pattern etching process according to claim 1, characterized in that: in the S1, a UV printing device with four white ribbons is used for UV printing, and the special-shaped multi-faceted aluminum is placed when placed. The printing side of the material is placed upward, and a specific bracket is placed under the special-shaped multi-faceted aluminum material to support it. 4. The special-shaped multi-faceted aluminum material surface pattern etching process according to claim 1, characterized in that: in said S2, before printing, wipe the excess ink from the nozzle, then test the height of the profile, and set the same on the printing equipment computer. Value, select the pattern to be printed, start printing, and accumulate white pigment through inkjet back and forth to form a protective layer of etched pattern texture. The temperature setting range during printing is 40-50°C. 5. The special-shaped multi-faceted aluminum material surface pattern etching process according to claim 1, characterized in that: in the S2, the thickness range of the etching pattern texture protective layer is 0.25-0.65mm. 6. The special-shaped multi-faceted aluminum surface pattern etching process according to claim 1, characterized in that: in the S3, the solution ratio in the alkali water tank is 65%-75% water and 15%-20% sodium hydroxide. , sodium nitrate 15%-20%. 7. The special-shaped multi-faceted aluminum material surface pattern etching process according to claim 1, characterized in that: in the S3, the temperature in the alkali water tank is maintained at 45-55°C, and the soaking time range is 30-60 minutes. 8. The special-shaped multi-faceted aluminum material surface pattern etching process according to claim 1, characterized in that: in the S4, the acid solution ratio is 60% water, 10% nitric acid, 10% sulfuric acid, and 20% hydrofluoric acid. . 9. The special-shaped multi-faceted aluminum material surface pattern etching process according to claim 1, characterized in that: in the S4, the temperature range during immersion in the acid solution is 80-120°C, and the immersion time range is 6-15 minutes. 10. The surface pattern etching process of special-shaped multi-faceted aluminum materials according to claim 1, characterized in that: in said S4, the coloring includes oxidation coloring and paint coloring.