CN105926017B - A kind of processing method and its Al-alloy products of aluminum alloy surface texture - Google Patents
A kind of processing method and its Al-alloy products of aluminum alloy surface texture Download PDFInfo
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- CN105926017B CN105926017B CN201610334283.2A CN201610334283A CN105926017B CN 105926017 B CN105926017 B CN 105926017B CN 201610334283 A CN201610334283 A CN 201610334283A CN 105926017 B CN105926017 B CN 105926017B
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/24—Pressing or stamping ornamental designs on surfaces
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/022—Anodisation on selected surface areas
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/12—Anodising more than once, e.g. in different baths
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/14—Producing integrally coloured layers
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
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Abstract
This application involves aluminum alloy surface process fields, specifically, the Al-alloy products for being related to a kind of processing method of aluminum alloy surface texture and being prepared.Its step is：The cubic texture pattern for designing aluminum alloy product surface carves the cubic texture pattern complementary with cubic texture pattern form on the inner wall of mold cavity for being used to prepare the Al-alloy products；Al-alloy products to be processed are placed in mold cavity, texture hot pressing is carried out；Photoresists post-exposure is coated in aluminum alloy product surface, carries out first time anodized；Photoresists are removed, second of anodized is carried out.It is realisation that the processing method of the application greatly simplifies aluminum alloy surface texture, has many advantages, such as easily to realize, time-consuming is short, production capacity is high, at low cost, consistency is good, surface texture effect is rich and varied.
Description
Technical field
This application involves aluminum alloy surface process fields, specifically, are related to a kind of processing method of aluminum alloy surface texture
And its Al-alloy products.
Background technique
Aluminum alloy surface effect is most commonly that wire drawing, sandblasting, and there are also use NC cutting tool machining texture, laser radium
The modes such as texture are penetrated in the processing mode of aluminum alloy surface, to realize texture in aluminum alloy surface.But NC cutting tool machining
The technology mode of texture has：Achievable texture has the shortcomings that limitation, time-consuming, production capacity is low, at high cost.Laser processing
Texture color also have limitation and difference, since laser texture color is limited, any face can not be done according to required design
Color collocation.And laser texture is confined to planar pattern, can not accomplish three-dimensional stereo effect.
In consideration of it, special propose the application.
Summary of the invention
The primary goal of the invention of the application is to propose a kind of processing method of aluminum alloy surface texture.
The second goal of the invention of the application is the Al-alloy products for proposing to be prepared using the processing method.
In order to complete the purpose of the application, the technical solution used for：
This application involves a kind of processing methods of aluminum alloy surface texture, at least include the following steps：
(1) the cubic texture pattern for designing aluminum alloy product surface, in the mould type for being used to prepare the Al-alloy products
The cubic texture pattern complementary with the cubic texture pattern form is carved on the inner wall of chamber；
(2) Al-alloy products to be processed are placed in step (1) to be prepared in mold cavity, mold cavity is heated to
500~550 DEG C and maintenance progress texture hot pressing in 1~180 second；
(3) Al-alloy products after texture hot pressing are taken out out of mold cavity, is coated in the aluminum alloy product surface
Photoresists post-exposure carries out first time anodized；
(4) photoresists are removed, second of anodized is carried out.
Preferably, it is carved on the inner wall of the mold cavity using the method for mold etching or laser laser carving.
Preferably, the heating rate in heating process is 1~10 DEG C/min, preferably 4~8 DEG C/min.
Preferably, it pressurizes to mold cavity, makes 5~10Mpa of pressure in mold cavity.
Preferably, it is pressurizeed by way of injecting gas into mold cavity, the preferred non-flammable compressive gas of gas, more
Preferably nitrogen.
Preferably, the Al-alloy products are carried out before carrying out first time anodized aoxidizing preceding processing, it is described
Aoxidizing pre-treatment includes acid degreasing, alkali cleaning, ash disposal neutralization, ultrasound washing and chemical polishing；In step (4), the is being carried out
Oxidation pre-treatment is carried out to the Al-alloy products before two-step anodization processing, the oxidation pre-treatment is to neutralize washing.
Preferably, the first time anodized and second of anodized are all made of sulfuric acid direct current sun
Pole oxidation；The condition of first time anodic oxidation is：Voltage is 11~12.5V, and current density is 0.9~1.0A/mm2, sulfuric acid is molten
Liquid mass concentration is 200~220g/L, and anodizing time is 30~40min；The condition of second of anodic oxidation is：Voltage is
10~11V, current density are 0.9~1.0A/mm2, sulfuric acid solution mass concentration is 150~180g/L, and anodizing time is
10~20 minutes.
Preferably, in step (3), the coating position of the photoresists is combined with the cubic texture pattern, thus
Forming tool, there are two types of the cubic texture patterns of color.
Preferably, in step (4), the photoresists are removed using liquid parting or demoulding powder.
The application further relates to a kind of Al-alloy products being prepared using the present processes, wherein the aluminium alloy
The depth of product surface cubic texture is 0.01~0.1mm, preferably 0.03~0.1mm.
The technical solution of the application at least has following beneficial effect：
The application is the high temperature plasticity using aluminum alloy materials, by the way of mold high temperature hot pressing aluminium, by mold
Texture is hot-forming to be needed on aluminum alloy surface, so as to form the aluminum alloy surface with cubic texture pattern.The application is also
It exposes masking anodic oxidation dyeing process mode by the film to combine, so as to form two tone dyeing in aluminum alloy surface.This Shen
Processing method please greatly simplifies the realisation problem of aluminum alloy surface texture, have easily realize, time-consuming is short, production capacity is high,
At low cost, the advantages that consistency is good, surface texture effect is rich and varied.And the limitation of aluminum alloy surface texture is breached,
It solves the problems, such as that the hardly possible for processing texture in aluminum alloy surface at present is realisation, production capacity is low, at high cost, also produces and more adopt
The new grain effect that cannot achieve with traditional processing mode.
Using the preparation method of the application, space pattern can be prepared and double-colored pattern is respectively present or double-colored solid
The Al-alloy products of pattern, so as to prepare the 3 D stereo texture of more various update grain husk.
Detailed description of the invention
Fig. 1 is the schematic diagram of 1 product of embodiment；
Fig. 2 is the schematic diagram of 2 product of embodiment.
Specific embodiment
Combined with specific embodiments below, the application is further described.It should be understood that these embodiments are merely to illustrate the application
Rather than limitation scope of the present application.
The application is prepared the aluminium with cubic texture pattern and closes in such a way that mould heat pressure is in conjunction with anodic oxidation
Golden product.Wherein, mould heat pressure is to be closed the hot-forming aluminium that is needed on of mold texture by the way of mold high temperature hot pressing aluminium
Gold surface, so as to form the aluminum alloy surface with cubic texture pattern.The aluminium alloy anode oxide of the application is to be not coated with
The aluminium alloy region surface for covering photoresists is that anode is placed in sulfuric acid electrolyte, using electrolysis, forms aluminium surface porous
The process of type aluminum oxide film layer.Color is disseminated for subsequent dyeing in the porous alumina film layer that aluminium workpiece surface is formed after anodic oxidation
Powder ion provides carrier.The application can by design texture requirement, selectively using oxidation resistant exposure development ink into
Row masking regional area.The aluminium alloy surface treatment method of the application, at least includes the following steps：
(1) the cubic texture pattern for designing aluminum alloy product surface, in the mold cavity for being used to prepare Al-alloy products
The cubic texture pattern complementary with cubic texture pattern form is carved on inner wall；
(2) Al-alloy products to be processed are placed in step (1) to be prepared in mold cavity, mold cavity is heated to
500~550 DEG C and maintenance progress texture hot pressing in 1~180 second, so that cubic texture imprint patterns and aluminium alloy in mold cavity
Material surface；
(3) Al-alloy products after texture hot pressing are taken out out of mold cavity, is coated in aluminum alloy product surface photosensitive
Glue post-exposure carries out first time anodized；
(4) photoresists are removed, second of anodized is carried out.
In this application, mold cavity is heated to 500~550 DEG C using the high temperature plasticity of aluminum alloy materials, at this
At a temperature of, aluminum alloy surface can quickly be formed to required space pattern.
As a kind of improvement of the application, in step (1), using the method for mold etching or laser laser carving in the mould
It is carved on the inner wall of tool type chamber.Wherein, mold etches, that is, uses chemical attack mold, formed on wall of die cavity
Target lines；Laser laser carving undercuts target lines using laser energy on wall of die cavity.
As a kind of improvement of the application, in step (2), the heating rate in heating process is 1~10 DEG C/min,
It is preferred that 4~8 DEG C/min.
It pressurizes in step (2) to mold cavity as a kind of improvement of the application, makes the pressure in mold cavity
Power is 5~10Mpa.Pressurization can accelerate the formation of cubic texture, and cubic texture can be made to be more clear and vividly.
As a kind of improvement of the application, pressurizeed by way of injecting gas into mold cavity, gas is preferred
Non-flammable compressive gas, more preferably nitrogen.By gas pressurized, make to pressurize more uniform, the cubic texture of formation is more uniform consistent.
As a kind of improvement of the application, in step (2), heating time preferably 20~60 seconds.The time of heating and aluminium
The scale of construction of alloy product and the complexity of space pattern are related, if stereo pattern is more complicated, depth is bigger, heat required
Time is longer.If stereo pattern is simpler, depth is smaller, required heating time is with regard to relatively short.
As a kind of improvement of the application, in step (3), fixed fixture is used after coating photoresists, then passes through purple
Outer smooth irradiation exposure, to make to coat the site curing of photoresists.Photoresists coating zone can be arbitrarily devised group according to designer
It closes.
As a kind of improvement of the application, in step (3), the aluminium is closed before carrying out first time anodized
Golden product carries out oxidation pre-treatment, and oxidation pre-treatment includes acid degreasing, alkali cleaning, ash disposal neutralization, ultrasound washing and chemical polishing；
In step (4), Al-alloy products are carried out before carrying out second of anodized to aoxidize preceding processing, oxidation pre-treatment is
Neutralize washing.
Wherein, first time anodic oxidation pre-treatment actual conditions are：
1, acid degreasing：Acid degreasing is all to carry out at normal temperature, be in the acid solution using sulfuric acid, phosphoric acid as base into
Row degreasing, wherein phosphorus acid content is 30~35g/L, and sulfuric acid content is 7~10g/L, and acid degreasing time is 5 minutes or so.
2, alkali cleaning：Purpose is the dirty of further removal surface, the natural oxide film of workpiece surface is completely removed, to appear
Pure metallic matrix out for subsequent anodic oxidation homogeneous conductive, generates uniform anode oxide film and lays a good foundation surface.
Alkali washing process process is to be put into Al alloy parts in the alkaline solution that sodium hydroxide is principal component to carry out etch reaction.Hydroxide
Sodium content is 40~55g/L, and the time is 2~5 minutes, and temperature is 40~50 DEG C.
3, ash disposal neutralizes：Purpose is to want the metals such as copper, iron, silicon of that layer of cleared alkali cleaning rear surface insoluble in alkaline solution
Between compound and its alkali cleaning product, to prevent its pollution to rear road anode oxidation groove liquid.In ash disposal and technique is using certain
The nitric acid solution of concentration generallys use 10%~25% nitric acid solution as in ash disposal and tank liquor, impregnates 1~3 at normal temperature
Minute.
4, ultrasound washing：The purpose of process is to thoroughly remove the remaining nitric acid solution of workpiece surface after ash disposal neutralizes, generally
Twice of ultrasonic cleaning, it is every all over about 3 minutes.
5, chemical polishing：Using the three sour chemical polishing solution as composed by phosphoric acid, sulfuric acid, nitric acid.Chemical polishing can remove
The slight mold mark in Al alloy parts surface, wiping scratch striped, the friction striped in mechanical polishing, thermal transformation layer etc., make coarse
Surface tend to surface that is smooth and obtaining approximate bright in mirror surface.Wherein the concentration in three sour chemical polishing solutions be phosphoric acid 25~
30g/L, 30~35g/L of sulfuric acid, 7~10g/L of nitric acid, temperature are 90 DEG C or so, and the time is 20~30 seconds.
As a kind of improvement of the application, in step (3), first time anodized includes anodic oxidation, dyeing
And sealing of hole；
Actual conditions are：
Sulfuric acid DC anodizing：Voltage is 11~12.5V, current density 1.0A/mm2, sulfuric acid solution concentration is 200
~220g/L, anodizing time are 30~40 minutes.
Dyeing：According to design requirement, to the aluminum alloy surface for having formed texture and anode oxide film of uncoated photoresists
Region is dyed, and dyeing is to be placed in the product of anodic oxidation in certain density toner slot to dye, can be according to setting
The color requirements of meter arbitrarily dye and texture collocation various appearances effect.
Sealing of hole：Sealing pores are carried out to the above-mentioned region for having formed texture and having dyed.Sealing of hole process is that " alumilite process is simultaneously
The hydration-treated process that anode oxide film is carried out after dyeing ".Aluminum component is placed in 85~100 DEG C containing whether there is or not nickel hole sealing agents
High temperature hole sealing processing is carried out in solution, the concentration of hole sealing agent is 5~10g/L, and the time is 30 minutes or so.
As a kind of improvement of the application, in step (4), the photoresists is removed using liquid parting or demoulding powder, are made
It is exposed to obtain the region protected when first time anodic oxidation by photoresists, and carries out second of anodic oxidation preparation.
Wherein, second of anodic oxidation pre-treatment actual conditions is：
Second of anodic oxidation will be carried out no longer, and pickling, alkali cleaning, change and throw, and directly be with washing using in weak nitric acid solution
It can.Neutralize washing：Nitric acid solution concentration is 5%~10%, and the time is 1~3 minute.
The actual conditions of second of anodic oxidation are：
Using sulfuric acid DC anodizing：Voltage is 10~11V, and current density is 0.9~1.0A/mm2, sulfuric acid solution is dense
Degree is 150~180g/L, and anodizing time is 10~20 minutes.
Dyeing：According to design requirement, second of anodic oxidation dyeing is carried out, can arbitrarily be contaminated according to the color requirements of design
Color and texture collocation various appearances effect.
Sealing of hole：Aluminum component is placed in 85~100 DEG C containing whether there is or not carry out high temperature hole sealing processing, sealing of hole in the solution of nickel hole sealing agent
The concentration of agent is 5~10g/L, and the time is 20~30 minutes.
As a kind of improvement of the application, in step (3), coating position and the cubic texture pattern of photoresists are mutually tied
It closes, to make two-dimensional color pattern in conjunction with established 3 D stereo texture, forming tool, there are two types of the cubic texture figures of color
Case deepens three-dimensional presentation effect so as to render using dyeing effect to stereoscopic effect.
If the coating position of photoresists and cubic texture pattern can form space pattern and bicolorable graph not in same position
The case where case is respectively present.
The application further relates to the Al-alloy products being prepared using the application preparation method, the aluminum alloy product surface
The depth of cubic texture is 0.01~0.1mm, preferably 0.03~0.1mm.
Embodiment 1
The present embodiment proposes a kind of aluminium alloy surface treatment method, includes the following steps：
1, the cubic texture pattern of aluminum alloy product surface is designed, for three-dimensional ball-type texture as shown in Figure 1；For making
The inner wall upper mold of the mold cavity of standby Al-alloy products etches the cubic texture pattern complementary with cubic texture pattern form；
2, Al-alloy products to be processed are placed in the mold cavity, mold cavity is heated to 550 DEG C and maintained 60 seconds
Carry out texture hot pressing；Heating rate in heating process is 5 DEG C/min, is filled with nitrogen to mold cavity while heating and carries out
Pressurization, makes the pressure 10Mpa in mold cavity；
3, the Al-alloy products after texture hot pressing are taken out and is cooled down out of mold, then followed the steps below：
3.1 coat photoresists in the white space that aluminum alloy product surface removes spherical region using fixed fixture, by ultraviolet
Light irradiation exposure, to make to coat the site curing of photoresists；
The oxidation pre-treatment of 3.2 first times anodic oxidation：
3.2.1 acid degreasing：It carries out at normal temperature, using sulfuric acid, phosphoric acid to carry out degreasing in the acid solution of base, wherein phosphorus
Acid content is 30g/L, and sulfuric acid content 7g/L, the time is 5 minutes；
3.2.2 alkali cleaning：Al alloy parts are put into sodium hydroxide solution and carry out etch reaction, sodium hydrate content is
40g/L, time are 3 minutes, and temperature is 45 DEG C；
3.2.3 ash disposal neutralizes：Using 15% nitric acid solution, impregnate 1~3 minute at normal temperature；
3.2.4 ultrasound washing：As be cleaned by ultrasonic twice, it is every all over about 3 minutes；
3.2.5 chemical polishing：Using three sour chemical polishing solutions, phosphoric acid 25g/L, sulphur as composed by phosphoric acid, sulfuric acid, nitric acid
Sour 30g/L, nitric acid 7g/L, temperature are 90 DEG C or so, and the time is 20 seconds；
3.3 first time anodizeds：
3.3.1 using sulfuric acid DC anodizing：Condition is：Voltage is 11~12.5V, and current density is 0.9~1.0A/
mm2, sulfuric acid solution mass concentration is 200~220g/L, and anodizing time is 30~40min；
3.3.2 dyeing：The product of anodic oxidation is placed in certain density toner slot and is dyed；
3.3.3 sealing of hole：85 DEG C are placed in containing whether there is or not carry out high temperature hole sealing processing, the concentration of hole sealing agent in the solution of nickel hole sealing agent
For 5~10g/L, the time is 30 minutes；
4, photoresists are removed using liquid parting or demoulding powder, carries out second of anodized, to the sky for removing spherical region
White region is dyed；
4.1 remove photoresists：
In 4.2 and wash：Nitric acid solution concentration is 10%, and the time is 2 minutes；
4.3 second of anodized：
4.3.1 using sulfuric acid DC anodizing：Condition is：Voltage is 10~11V, and current density is 0.9~1.0A/
mm2, sulfuric acid solution concentration is 150~180g/L, and anodizing time is 10~20 minutes；
4.3.2 dyeing：The product of anodic oxidation is placed in certain density toner slot and is dyed；
4.3.3 sealing of hole：Aluminum component is placed in 100 DEG C containing whether there is or not carry out high temperature hole sealing processing, sealing of hole in the solution of nickel hole sealing agent
The concentration of agent is 5~10g/L, and the time is 20 minutes.
Al-alloy products as shown in Figure 1 are prepared using the preparation method of the present embodiment, to ball-type texture oxidation the
Anodic oxidation dyeing, other white spaces carry out second of anodic oxidation dyeing, form multicolour cubic texture effect, ball
The depth of shape texture is 0.03~0.1mm.
Embodiment 2
The present embodiment proposes a kind of aluminium alloy surface treatment method, includes the following steps：
1, the cubic texture pattern of aluminum alloy product surface is designed, is 3-D triangle texture described in Fig. 2；For making
The inner wall upper mold laser laser carving of the mold cavity of the standby Al-alloy products cubic texture figure complementary with cubic texture pattern form
Case；
2, Al-alloy products to be processed are placed in the mold cavity, mold cavity is heated to 500 DEG C and maintained 60 seconds
Carry out texture hot pressing；Heating rate in heating process is 8 DEG C/min；Nitrogen is filled with to mold cavity while heating to add
Pressure, makes the pressure 8Mpa in mold cavity；
3, the Al-alloy products after texture hot pressing are taken out and is cooled down out of mold, in aluminum alloy product surface triangle texture
Region coating photoresists post-exposure carries out first time anodized；Actual conditions are the same as embodiment 1；
4, photoresists are removed using liquid parting or demoulding powder, second of anodized is carried out to triangle texture region；
Actual conditions are the same as embodiment 1.
Al-alloy products as shown in Figure 2 are prepared using the preparation method of the present embodiment, the is carried out to white space
Anodic oxidation dyeing carries out second of anodic oxidation dyeing oxidation to triangle texture region, forms multicolour cubic texture
Effect, the depth of triangular texture are 0.03~0.1mm.
It is not for limiting claim, any this field skill although the application is disclosed as above with preferred embodiment
Art personnel without departing from the concept of this application, can make several possible variations and modification, therefore the application
Protection scope should be subject to the range that the claim of this application is defined.
Claims (14)
1. a kind of processing method of aluminum alloy surface texture, which is characterized in that at least include the following steps：
(1) the cubic texture pattern for designing aluminum alloy product surface, is being used to prepare the mold cavity of the Al-alloy products
The cubic texture pattern complementary with the cubic texture pattern form is carved on inner wall；
(2) Al-alloy products to be processed step (1) is placed in be prepared in mold cavity, mold cavity is heated to 500~
550 DEG C and maintenance progress texture hot pressing in 1~180 second；
(3) Al-alloy products after texture hot pressing are taken out out of described mold cavity, is coated in the aluminum alloy product surface
Photoresists post-exposure carries out first time anodized；
(4) photoresists are removed, second of anodized is carried out.
2. processing method according to claim 1, which is characterized in that in step (1), using mold etching or laser radium
The method of carving is carved on the inner wall of the mold cavity.
3. processing method according to claim 1, which is characterized in that the heating rate in step (2), in heating process
For 1~10 DEG C/min.
4. processing method according to claim 3, which is characterized in that heating rate in heating process is 4~8 DEG C/
min。
5. processing method according to claim 1, which is characterized in that in step (2), pressurize to mold cavity,
Make 5~10Mpa of pressure in mold cavity.
6. processing method according to claim 4, which is characterized in that into mold cavity inject gas by way of into
Row pressurization.
7. processing method according to claim 6, which is characterized in that the gas is non-flammable compressive gas.
8. processing method according to claim 6, which is characterized in that the gas is nitrogen.
9. processing method according to claim 1, which is characterized in that in step (3), carrying out first time anodic oxidation
Oxidation pre-treatment is carried out to the Al-alloy products before processing, the oxidation pre-treatment is including in acid degreasing, alkali cleaning, ash disposal
With ultrasound washing and chemical polishing；In step (4), to the Al-alloy products before carrying out second of anodized
Oxidation pre-treatment is carried out, the oxidation pre-treatment is to neutralize washing.
10. processing method according to claim 1, which is characterized in that the first time anodized and described
Two-step anodization processing is all made of sulfuric acid DC anodizing；The condition of the first time anodic oxidation is：Voltage be 11~
12.5V, current density are 0.9~1.0A/mm2 , sulfuric acid solution mass concentration is 200~220g/L, anodizing time 30
~40min；The condition of second of anodic oxidation is：Voltage is 10~11V, and current density is 0.9~1.0A/mm2 , sulfuric acid
Concentration of polymer solution is 150~180g/L, and anodizing time is 10~20 minutes.
11. processing method according to claim 1, which is characterized in that in step (3), the coating position of the photoresists
It sets and is combined with the cubic texture pattern, there are two types of the cubic texture patterns of color to form tool.
12. processing method according to claim 1, which is characterized in that in step (4), using liquid parting or demoulding powder
Remove the photoresists.
13. a kind of Al-alloy products that the method as described in claim 1~12 any claim is prepared, feature exist
In the depth of the aluminum alloy product surface cubic texture is 0.01~0.1mm.
14. Al-alloy products according to claim 13, which is characterized in that the aluminum alloy product surface cubic texture
Depth is 0.03~0.1mm.
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