CN105364637B - A kind of surface treatment method of Al-alloy casing - Google Patents
A kind of surface treatment method of Al-alloy casing Download PDFInfo
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- CN105364637B CN105364637B CN201510642064.6A CN201510642064A CN105364637B CN 105364637 B CN105364637 B CN 105364637B CN 201510642064 A CN201510642064 A CN 201510642064A CN 105364637 B CN105364637 B CN 105364637B
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 67
- 238000004381 surface treatment Methods 0.000 title claims abstract description 49
- 238000005491 wire drawing Methods 0.000 claims abstract description 134
- 238000011282 treatment Methods 0.000 claims abstract description 59
- 238000005422 blasting Methods 0.000 claims abstract description 39
- 230000003647 oxidation Effects 0.000 claims abstract description 25
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 239000011148 porous material Substances 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims description 42
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 40
- 239000004576 sand Substances 0.000 claims description 32
- 238000005530 etching Methods 0.000 claims description 27
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 23
- 229910017604 nitric acid Inorganic materials 0.000 claims description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 20
- 239000000126 substance Substances 0.000 claims description 19
- 238000004043 dyeing Methods 0.000 claims description 18
- 238000005498 polishing Methods 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 11
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 10
- 239000000975 dye Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229910052845 zircon Inorganic materials 0.000 claims description 5
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 5
- 239000003086 colorant Substances 0.000 claims description 4
- 238000010129 solution processing Methods 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 claims 2
- 239000004411 aluminium Substances 0.000 claims 2
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 claims 1
- 238000003672 processing method Methods 0.000 claims 1
- 238000005488 sandblasting Methods 0.000 abstract description 13
- XVVZSEXTAACTPS-UHFFFAOYSA-N 5-[hydroxy-(4-nitrophenoxy)phosphoryl]pentanoic acid Chemical compound OC(=O)CCCCP(O)(=O)OC1=CC=C([N+]([O-])=O)C=C1 XVVZSEXTAACTPS-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000005238 degreasing Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/06—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for producing matt surfaces, e.g. on plastic materials, on glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- 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
-
- 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
- C25D11/18—After-treatment, e.g. pore-sealing
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides a kind of surface treatment method of Al-alloy casing, the surface treatment method comprises the following steps：The side wire drawing of Al-alloy casing is obtained wire-drawing surface by S1；The non-wire-drawing surface of Al-alloy casing is carried out blasting treatment by S2；Al-alloy casing after wire drawing and blasting treatment is integrally carried out anodized by S3, forms oxidation film layer；Al-alloy casing after anodized is carried out sealing pores by S4, obtains side wire drawing, the Al-alloy casing of non-wire-drawing surface sandblasting.The surface treatment method of the Al-alloy casing make it that the appearance of Al-alloy casing is more rich various.
Description
Technical field
The invention belongs to the technical field of surface of metal material, more particularly to a kind of surface treatment of Al-alloy casing
Method.
Background technology
Aluminium alloy is most widely used a kind of non-ferrous metal structural material in industry, in Aeronautics and Astronautics, automobile, machinery
Widely applied in manufacture, ship and chemical industry.The rapid development of industrial economy, to the demand day of Welded structural member
Benefit increases, and the Research on Weldability enabled aluminum alloy to is also goed deep into therewith.Aluminium alloy is to apply most alloys at present.
The progress of science and technology brings great convenience to our life, and mobile phone has turned into indispensable in our daily lifes
Few product.Because the aluminium alloy anode oxide effect of 5 serial (such as 5052) and 6 serial (such as 6061,6063) materials is preferable, mesh
The battery cover of preceding various mobile phones uses both serial aluminium alloys more, but at the surface of both serial aluminum alloy materials
Science and engineering skill is that anodic oxidation is done after sandblasting, and appearance lacks innovative.
The A of CN 104805485 disclose a kind of pack alloy surface treatment method, are related to metal surface treatment technology neck
Domain.The pack alloy surface treatment method comprises the following steps：S10, pack alloy is subjected to grinding process；S20, will beat
Pack alloy after mill processing carries out blasting treatment；S30, by after blasting treatment pack alloy carry out anodic oxidation at
Reason, oxidation film layer is formed on pack alloy surface；S40, the pack alloy after anodized is subjected to dyeing processing；
S50, dyeing is handled after pack alloy carry out sealing pores.CN 102582339A disclose one kind in aluminum alloy surface
The method of double-colored wire drawing plated film：By aluminium alloy blank pre-treatment；Al-alloy parts through pre-treatment are subjected to anodic oxidation dyeing；Will
After the Al-alloy parts drying and processing of dyeing, stove is plated into physical vapour deposition (PVD)；By the workpiece vacuum moulding machine color film of gained；Will plating
The Al-alloy parts of color film carry out wire drawing, pull out required lines；The wire drawing workpiece coating hood finish coat varnish that will be obtained, obtain surface warp
Cross the aluminium alloy of double-colored wire drawing plated film.But the appearance of aluminium alloy made from the surface treatment method is still not abundant enough
It is various.
The content of the invention
The problem of existing for prior art, it is an object of the invention to provide a kind of surface treatment side of Al-alloy casing
Method, the surface treatment method enable to the outward appearance of Al-alloy casing to have rich and varied effect.
To use following technical scheme up to this purpose, the present invention：
A kind of surface treatment method of Al-alloy casing, the surface treatment method comprise the following steps：
The side wire drawing of Al-alloy casing is obtained wire-drawing surface by S1；
The non-wire-drawing surface of Al-alloy casing is carried out blasting treatment by S2；
Al-alloy casing after wire drawing and blasting treatment is integrally carried out anodized by S3, forms oxide-film
Layer；
Al-alloy casing after anodized is carried out sealing pores by S4, obtains side wire drawing, non-wire drawing facing sand face
Al-alloy casing.
Housing of the present invention refers to be surrounded by inside and outside two curved surfaces, and thickness is much smaller than middle face minimum profile curvature radius peace
The laminated structure of face size.The front of the housing is the positive camber for removing side, and side is that thickness of shell is represented in positive camber
Face.Typical but non-limiting Al-alloy casing is aluminium alloy mobile phone battery cover.
The surface treatment method of Al-alloy casing provided by the invention, first the side of Al-alloy casing is carried out at wire drawing
Reason, obtains wire-drawing surface, the non-wire-drawing surface of Al-alloy casing is carried out into blasting treatment afterwards, then carry out anodic oxidation to whole housing
Processing, whole housing being finally subjected to sealing pores again, the wire drawing, sandblasting and anodic oxidation in processing cooperate, therefore, place
Al-alloy casing appearance after reason is rich and varied, disclosure satisfy that demand of the modern people to product appearance.
Step S31 is also carried out after step S3 and before step S4：Al-alloy casing after anodized is carried out
Dyeing is handled；
Preferably, the coloring agent used in the dyeing processing is golden coloring agent, blue dyeing agent or black dye.
If it is intended to the Al-alloy casing of production aluminium alloy true qualities, then do not have to dyeing.
Step S1 carries out wire drawing to the side of Al-alloy casing using craft or wire drawing machine, and the wire drawing can be laterally to draw
Silk, longitudinal wire drawing or oblique wire drawing.
Preferably, in the wire drawing machine pulling wheel model 20-800 mesh, such as 50 mesh, 80 mesh, 100 mesh, 200 mesh, 300
Mesh, 400 mesh, 500 mesh, 600 mesh, 700 mesh or 800 mesh etc..
Preferably, the rotating speed of the wire drawing machine is 1800-2400r/min, such as 1900r/min, 2000r/min, 2100r/
Min, 2200r/min, 2300r/min or 2350r/min etc..
Preferably, the speed of travel of Al alloy shell body side surface described in wire drawing process described in step S1 is 2-30m/min, such as
5m/min, 8m/min, 10m/min, 15m/min, 20m/min, 25m/min or 28m/min etc..
Preferably, the outlet scope of wire drawing process described in step S1 is 0.1-2.5mm, as 0.2mm, 0.3mm, 0.5mm,
0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.2mm or 2.4mm etc., the wire drawing outlet scope refer to product silk
Width.
Step S2 is specially：The non-wire-drawing surface of Al-alloy casing is protected with tool, sprayed afterwards on wire-drawing surface
Sandblast resistant durable ink, removes tool, then carries out blasting treatment to non-wire-drawing surface, divests sandblast resistant durable ink after blasting treatment.
Manual sandblasting or machine sandblasting can be selected in blasting treatment described in step S2, and the blasting treatment is with glass sand, steel sand
Or one kind in zircon sand or at least two it is combined as material spray.
Preferably, the sand mold is 80-220 mesh, such as 85 mesh, 90 mesh, 100 mesh, 120 mesh, 150 mesh, 180 mesh, 200 mesh or
210 mesh etc..
Preferably, the pressure of blasting treatment described in step S2 is 1.0-2.5kg/cm2, such as 1.2kg/cm2、1.5kg/cm2、
1.8kg/cm2、2.0kg/cm2、2.2kg/cm2Or 2.4kg/cm2Deng.
Preferably, described in step S2 during blasting treatment, the speed of travel of the non-wire-drawing surface of Al-alloy casing is 8-15m/
Min, such as 9m/min, 10m/min, 11m/min, 12m/min, 13m/min or 14m/min.
Aluminum alloy surface can be cleared up and be roughened to blasting treatment, improve its mechanical performance, and make its surface that matt be presented
Effect.
Following steps are also carried out after step S2 and before step S3：
Al-alloy casing after wire drawing process and blasting treatment is carried out ungrease treatment by S21；
Al-alloy casing after ungrease treatment is carried out alkaline etching by S22；
S23 removes caused black film after alkaline etching processing；
Al-alloy casing after removing black film is carried out chemical polishing by S24.
Step S21 carries out degreasing using the mixed liquor of tertiary sodium phosphate, NPE and dodecyl sodium sulfate
Processing.
Preferably, the concentration of tertiary sodium phosphate is 50-60g/L, such as 52g/L, 53g/L, 54g/L, 55g/L, 56g/L, 57g/
L, 58g/L or 59g/L etc., the concentration of NPE is 2-8mL/L, as 3mL/L, 4mL/L, 5mL/L, 6mL/L,
7mL/L or 8mL/L etc., dodecyl sodium sulfate 0.5-2g/L, such as 0.8g/L, 1.0g/L, 1.2g/L, 1.5g/L or 1.8g/L
Deng.
Preferably, ungrease treatment is carried out under the conditions of 50-60 DEG C described in step S21, such as 52 DEG C, 53 DEG C, 54 DEG C, 55
DEG C, carry out at 57 DEG C or 59 DEG C.
Preferably, the time of ungrease treatment described in step S21 is 3-5min, such as 3min, 4min or 5min.
Step S22 carries out alkaline etching processing using sodium hydroxide solution.
Preferably, the concentration of the sodium hydroxide solution is 50-60g/L, as 52g/L, 53g/L, 54g/L, 55g/L,
56g/L, 57g/L, 58g/L or 59g/L etc..
Preferably, the temperature that alkaline etching described in step S22 is handled is 55-65 DEG C, such as 56 DEG C, 58 DEG C, 60 DEG C, 62 DEG C, 63 DEG C
Or 64 DEG C etc..
Preferably, described in step S22 alkaline etching handle time be 5-30s, as 6s, 7s, 8s, 10s, 15s, 18s, 20s,
22s, 25s or 28s etc..
Step S23 removes the black film after alkaline etching processing using salpeter solution.
Preferably, the concentration of the salpeter solution is 200-400mL/L, as 210mL/L, 220mL/L, 240mL/L,
260mL/L, 300mL/L, 320mL/L, 340mL/L or 380mL/L etc..
Preferably, the time of salpeter solution processing is 10-60s, as 12s, 15s, 18s, 20s, 22s, 25s, 28s,
30s, 35s, 40s, 45s, 50s or 55s etc..
Preferably, chemical polishing described in step S24 is carried out in the mixed liquor of phosphoric acid and nitric acid.
Preferably, the percentage by volume of phosphoric acid is 93% in the mixed liquor, and the percentage by volume of nitric acid is 7%.
Preferably, the phosphoric acid is the phosphoric acid that weight/mass percentage composition is 98%, and the nitric acid is that weight/mass percentage composition is
68% nitric acid.
Preferably, the time of chemical polishing described in step S24 is 5-60s, as 8s, 10s, 12s, 15s, 18s, 20s, 22s,
25s, 28s, 30s, 35s, 40s, 45s, 50s or 55s etc..
Anodized described in step S3 is carried out in the sulfuric acid solution that concentration is 150-220g/L, is such as in concentration
Carried out in 155g/L, 165g/L, 175g/L, 180g/L, 195g/L or 210g/L etc. sulfuric acid solution.
Preferably, the voltage of anodized described in step S3 is 8-16V, such as 9V, 10V, 11V, 12V, 14V, 15V or
15.5V etc., current density 1-1.5A/dm2, such as 1.1A/dm2、1.2A/dm2、1.3A/dm2、1.4A/dm2Or 1.5A/dm2Deng.
Preferably, the time of anodized described in step S3 is 30-60min, as 33min, 35min, 38min,
40min, 42min, 45min, 50min, 55min or 58min etc..
Preferably, the thickness of oxidation film layer described in step S3 is 5-15 μm, such as 6 μm, 8 μm, 10 μm, 12 μm, 13 μm or 14 μ
M etc..
Aluminum alloy surface after anodized forms one layer of oxidation film, enables aluminum alloy to the corrosion resistance of surface of shell
It can improve.
The purpose of sealing pores described in step S4 is the corrosion-resistant and antifouling property for improving product, while can avoid
Dyestuff after dyeing overflows.
Compared with prior art, beneficial effects of the present invention are：
The surface treatment method of Al-alloy casing provided by the invention, first the side of Al-alloy casing is carried out at wire drawing
Reason, blasting treatment is carried out to the non-wire-drawing surface of Al-alloy casing afterwards, then anodized is carried out to whole housing；The drawing
Silk processing can obtain different outlet scopes, and wire drawing is various informative, can be horizontal wire drawing, longitudinal wire drawing, lateral wire drawing
Or screw thread wire drawing；The blasting treatment can obtain the sand sense of variable grain size using different material sprays；At the anodic oxidation
Reason can improve the corrosion resistance of Al-alloy casing；The wire drawing process, blasting treatment and anodized cooperate,
So that the Al-alloy casing after processing is rich in color, outward appearance is various.
Brief description of the drawings
Fig. 1 is the process flow for carrying out surface treatment figure for the Al-alloy casing that embodiment 1 provides.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Embodiment 1
The process of surface treatment of Al-alloy casing is as shown in figure 1, the process of surface treatment comprises the following steps：
The wire drawing of S1 sides：By the side wire drawing of Al-alloy casing, wire-drawing surface is obtained；
S2 protects non-wire-drawing surface with tool；
S3 sprays sandblast resistant durable ink on wire-drawing surface；
S4 removes tool；
The non-wire-drawing surface blasting treatments of S5：The non-wire-drawing surface of Al-alloy casing is subjected to blasting treatment；
S6 shells ink：Ink on wire-drawing surface is divested；
S7 alkaline etchings：Al-alloy casing after stripping ink is subjected to ungrease treatment；
S8 degreasings：Al-alloy casing after ungrease treatment is subjected to alkaline etching；
S9 desmuts：Remove caused black film after alkaline etching is handled；
S10 chemical polishings：Al-alloy casing after removal black film is subjected to chemical polishing；
S11 anodic oxidations：Al-alloy casing after chemical polishing is integrally subjected to anodized, forms oxide-film
Layer；
S12 is dyed：Dyeing processing is carried out to the Al-alloy casing after anodized.
S13 sealing of holes：Al-alloy casing after dyeing is subjected to sealing pores, obtains side wire drawing, non-wire drawing facing sand face
Al-alloy casing.
Embodiment 2
A kind of process of surface treatment of Al-alloy casing, comprises the following steps：
The wire drawing of S1 sides：The side of Al-alloy casing is subjected to horizontal wire drawing, the model 800 of pulling wheel with wire drawing machine
Mesh, wire drawing walking speed are 30m/min, and the rotating speed of wire drawing machine is 1800r/min, and outlet scope is 0.1mm, obtains wire-drawing surface；
S2 wire-drawing surfaces oil spout ink：Non- wire-drawing surface is protected with tool, sprays sandblast resistant durable ink on wire-drawing surface afterwards, then
Tool is removed, obtains the Al-alloy casing of side oil spout ink；
The non-wire-drawing surfaces of S3 carry out blasting treatment：The non-wire-drawing surface of Al-alloy casing is subjected to blasting treatment, material spray is glass
One kind or at least two combination in sand, steel sand or zircon sand, sand mold are 220 mesh, and sand grains size is 0.05mm, and blasting pressure is
2.5kg/cm2, sandblasting walking speed is 15m/min；
S4 shells ink：Ink on wire-drawing surface is divested；
S5 degreasings：Al-alloy casing after wire drawing process and blasting treatment is subjected to ungrease treatment, the solution of ungrease treatment
For the mixed liquor of tertiary sodium phosphate, NPE and dodecyl sodium sulfate, the wherein concentration of tertiary sodium phosphate is 50g/
L, the concentration of NPE is 5mL/L, and the concentration of dodecyl sodium sulfate is 1g/L, and the temperature of ungrease treatment is 50
DEG C, time 3min；
S6 alkaline etchings：In concentration it is 50g/L by the Al-alloy casing after ungrease treatment, temperature is 60 DEG C of sodium hydroxide solution
Middle progress alkaline etching processing 5-30s；
S7 desmuts：Al-alloy casing after alkaline etching is handled is immersed in 10-60s in the nitric acid that concentration is 300mL/L, goes
Except black film caused by alkaline etching processing；
S8 chemical polishings：Al-alloy casing after removal black film is subjected to chemical throwing in the mixed liquor of phosphoric acid and nitric acid
Light 5-60s, wherein, the percentage by volume of phosphoric acid is 93% in mixed liquor, and the percentage by volume of nitric acid is 7%, and the phosphoric acid is
Weight/mass percentage composition is 98% phosphoric acid, and the nitric acid is the nitric acid that weight/mass percentage composition is 68%；
S9 anodic oxidations：Al-alloy casing after chemical polishing is subjected to anode in the sulfuric acid solution that concentration is 150g/L
Oxidation processes, the voltage of anodic oxidation is 8V, current density 1A/dm2, time 30-60min, the oxygen of formation 5-15 μ m-thicks
Change film layer；
S10 is dyed：Dyeing processing is carried out to the Al-alloy casing after anodized.
S11 sealing of holes：Al-alloy casing after dyeing is handled carries out sealing pores, obtains side wire drawing, non-wire drawing facing sand
The Al-alloy casing in face.
Al-alloy casing appearance looks elegant after processing.
Embodiment 3
A kind of process of surface treatment of Al-alloy casing, comprises the following steps：
The wire drawing of S1 sides：The side of Al-alloy casing is subjected to longitudinal wire drawing with wire drawing machine, the mesh of model 20 of pulling wheel,
Wire drawing walking speed is 2m/min, and the rotating speed of wire drawing machine is 2400r/min, and outlet scope is 2.5mm, obtains wire-drawing surface；
S2 wire-drawing surfaces oil spout ink：Non- wire-drawing surface is protected with tool, sprays sandblast resistant durable ink on wire-drawing surface afterwards, then
Tool is removed, obtains the Al-alloy casing of side oil spout ink；
The non-wire-drawing surfaces of S3 carry out blasting treatment：The non-wire-drawing surface of Al-alloy casing is subjected to blasting treatment, material spray is glass
One kind or at least two combination in sand, steel sand or zircon sand, sand mold are 80 mesh, and sand grains size is 0.178mm, and blasting pressure is
1.0kg/cm2, sandblasting walking speed is 8m/min；
S4 shells ink：Ink on wire-drawing surface is divested；
S5 degreasings：Al-alloy casing after wire drawing process and blasting treatment is subjected to ungrease treatment, the solution of ungrease treatment
For the mixed liquor of tertiary sodium phosphate, NPE and dodecyl sodium sulfate, the wherein concentration of tertiary sodium phosphate is 60g/
L, the concentration of NPE is 2mL/L, and the concentration of dodecyl sodium sulfate is 0.5g/L, and the temperature of ungrease treatment is
60 DEG C, time 5min；
S6 alkaline etchings：In concentration it is 60g/L by the Al-alloy casing after ungrease treatment, temperature is 55 DEG C of sodium hydroxide solution
Middle progress alkaline etching processing 30s；
S7 desmuts：Al-alloy casing after alkaline etching is handled is immersed in 60s in the nitric acid that concentration is 200mL/L, removes
Black film caused by alkaline etching processing；
S8 chemical polishings：Al-alloy casing after removal black film is subjected to chemical throwing in the mixed liquor of phosphoric acid and nitric acid
Light 60s, wherein, the percentage by volume of phosphoric acid is 93% in mixed liquor, and the percentage by volume of nitric acid is 7%, and the phosphoric acid is matter
The phosphoric acid that percentage composition is 98% is measured, the nitric acid is the nitric acid that weight/mass percentage composition is 68%；
S9 anodic oxidations：Al-alloy casing after chemical polishing is subjected to anode in the sulfuric acid solution that concentration is 220g/L
Oxidation processes, the voltage of anodic oxidation is 16V, current density 1.5A/dm2, time 30-60min, form 5-15 μ m-thicks
Oxidation film layer；
S10 is dyed：Dyeing processing is carried out to the Al-alloy casing after anodized.
S11 sealing of holes：Al-alloy casing after dyeing is subjected to sealing pores, obtains side wire drawing, non-wire drawing facing sand face
Al-alloy casing.
Al-alloy casing appearance looks elegant after processing.
Embodiment 4
A kind of process of surface treatment of Al-alloy casing, comprises the following steps：
The wire drawing of S1 sides：The side of Al-alloy casing is subjected to screw thread wire drawing process, the model of pulling wheel with wire drawing machine
50 mesh, wire drawing walking speed are 25m/min, and the rotating speed of wire drawing machine is 2000r/min, and outlet scope is 1.0mm, obtains wire-drawing surface；
S2 wire-drawing surfaces oil spout ink：Non- wire-drawing surface is protected with tool, sprays sandblast resistant durable ink on wire-drawing surface afterwards, then
Tool is removed, obtains the Al-alloy casing of side oil spout ink；
The non-wire-drawing surfaces of S3 carry out blasting treatment：The non-wire-drawing surface of Al-alloy casing is subjected to blasting treatment, material spray is glass
One kind or at least two combination in sand, steel sand or zircon sand, sand mold are 100 mesh, and sand grains size is 1mm, and blasting pressure is
1.5kg/cm2, sandblasting walking speed is 10m/min；
S4 shells ink：Ink on wire-drawing surface is divested；
S5 degreasings：Al-alloy casing after wire drawing process and blasting treatment is subjected to ungrease treatment, the solution of ungrease treatment
For the mixed liquor of tertiary sodium phosphate, NPE and dodecyl sodium sulfate, the wherein concentration of tertiary sodium phosphate is 55g/
L, the concentration of NPE is 8mL/L, and the concentration of dodecyl sodium sulfate is 2g/L, and the temperature of ungrease treatment is 55
DEG C, time 3-5min；
S6 alkaline etchings：In concentration it is 55g/L by the Al-alloy casing after ungrease treatment, temperature is 65 DEG C of sodium hydroxide solution
Middle progress alkaline etching processing 5-30s；
S7 desmuts：Al-alloy casing after alkaline etching is handled is immersed in 10-60s in the nitric acid that concentration is 400mL/L, goes
Except black film caused by alkaline etching processing；
S8 chemical polishings：Al-alloy casing after removal black film is subjected to chemical throwing in the mixed liquor of phosphoric acid and nitric acid
Light 5-60s, wherein, the percentage by volume of phosphoric acid is 93% in mixed liquor, and the percentage by volume of nitric acid is 7%, and the phosphoric acid is
Weight/mass percentage composition is 98% phosphoric acid, and the nitric acid is the nitric acid that weight/mass percentage composition is 68%；
S9 anodic oxidations：Al-alloy casing after chemical polishing is subjected to anode in the sulfuric acid solution that concentration is 200g/L
Oxidation processes, the voltage of anodic oxidation is 12V, current density 1.2/dm2, time 30-60min, form 5-15 μ m-thicks
Oxidation film layer；
S10 is dyed：Dyeing processing is carried out to the Al-alloy casing after anodized.
S11 sealing of holes：Al-alloy casing after dyeing is handled carries out sealing pores, obtains side wire drawing, non-wire drawing facing sand
The Al-alloy casing in face.
Al-alloy casing appearance looks elegant after processing.
Comparative example 1
In addition to not comprising step S1, remaining is same as Example 4.
Al-alloy casing after processing does not have metal-like due to lacking side wire drawing, the side outward appearance of Al-alloy casing,
And the pattern of itself, appearance are bad, it is believed that are defective products.
Comparative example 2
In addition to not comprising step S3, remaining is same as Example 4.
For Al-alloy casing after processing due to non-wire-drawing surface not sandblasting, the non-wire-drawing surface of obtained Al-alloy casing does not have sand
Feel, without metal-like, appearance is unsightly.
Comparative example 3
In addition to not comprising step S9, remaining is same as Example 4.
Al-alloy casing after processing can not form micropore due to not doing anodic oxidation direct staining, product, and dyestuff can not
Absorption is in micropore, therefore, it is impossible to dye or Color is very poor, the rich and varied color of outward appearance can not show.
Comparative example 4
In addition to not comprising S11, remaining is same as Example 4.
Al-alloy casing after processing is because no sealing pores, dyestuff easily fade, and product feel is bad, no resistance and fingerprint resistance
Performance, corrosion resistance is bad, and very artificial perspiration's test such as salt spray test does not reach 48 hours.
Comparative example 5
In addition to first carrying out step S3 and carrying out S1 and S2 again, remaining is same as Example 4.
Al-alloy casing elder generation sandblasting wire drawing again after processing, sandblasting can be worn because sandblasting face is not protected, during wire drawing
Face, cause sandblasting uneven or have strip vestige, product FINAL APPEARANCE is bad.
Comparative example 7
Except step S1 is：The side of Al-alloy casing is subjected to wire drawing process with wire drawing machine, the mesh of pulling wheel model 10, drawn
Silk walking speed is 35m/min, and the rotating speed of wire drawing machine is outside 15000r/min, remaining is same as Example 4.
Al-alloy casing after processing uses the pulling wheel of 10 mesh, and wire vent diameter is very thick, and appearance is bad；And wire drawing is walked
Speed can cause very much to draw partially, so as to wear non-wire-drawing surface, to cause open defect soon, and utilize more than 4000r/min rotating speed, wire drawing
Machine easily wears, the easy sideslip of product, therefore the appearance of the Al-alloy casing after processing is very poor.
Comparative example 8
Except step S1 is：The side of Al-alloy casing is subjected to wire drawing process, the model 850 of pulling wheel with wire drawing machine
Mesh, wire drawing walking speed are 1m/min, and the rotating speed of wire drawing machine is outside 2500r/min, remaining is same as Example 4.
Al-alloy casing wire drawing after processing uses 850 mesh, and low walking speed, wire vent diameter is too thin (being less than 0.1mm), therefore,
Al-alloy casing wire-drawing effect after processing is bad, and the low walking speed production capacity of wire drawing is relatively low.
Applicant states, the foregoing is only the embodiment of the present invention, but protection scope of the present invention not office
It is limited to this, person of ordinary skill in the field is it will be clearly understood that any belong to those skilled in the art and taken off in the present invention
In the technical scope of dew, the change or replacement that can readily occur in, all fall within protection scope of the present invention and it is open within the scope of.
Claims (27)
1. a kind of surface treatment method of Al-alloy casing, it is characterised in that the surface treatment method comprises the following steps：
The side wire drawing of Al-alloy casing is obtained wire-drawing surface by S1；
The non-wire-drawing surface of Al-alloy casing is carried out blasting treatment by S2, specifically, with tool by the non-wire-drawing surface of Al-alloy casing
Protect, spray sandblast resistant durable ink on wire-drawing surface afterwards, tool is removed, then blasting treatment, spray are carried out to non-wire-drawing surface
Sandblast resistant durable ink is divested after sand processing；Sand mold is 80-200 mesh；
Al-alloy casing after wire drawing and blasting treatment is carried out overall anodized by S3, forms oxidation film layer, institute
Anodized is stated to carry out in concentration is 150-220g/L sulfuric acid solutions；
Al-alloy casing after anodized is carried out sealing pores by S4, obtains side wire drawing, the aluminium in non-wire drawing facing sand face
Alloy shell；
Step S1 carries out wire drawing using wire drawing machine to the side of Al-alloy casing；
The model 20-800 mesh of pulling wheel in the wire drawing machine；
The rotating speed of the wire drawing machine is 1800-2400r/min；
The speed of travel of Al alloy shell body side surface described in wire drawing process described in step S1 is 2-30m/min.
2. surface treatment method according to claim 1, it is characterised in that also carried out after step S3 and before step S4
Step S31：Dyeing processing is carried out to the Al-alloy casing after anodized.
3. surface treatment method according to claim 2, it is characterised in that the coloring agent used in dyeing processing is
Golden coloring agent, blue dyeing agent or black dye.
4. surface treatment method according to claim 1, it is characterised in that aluminium described in wire drawing process described in step S1 closes
The speed of travel of golden shell body side surface is 2-30m/min.
5. surface treatment method according to claim 1, it is characterised in that the outlet scope of wire drawing process described in step S1
For 0.1-2.5mm.
6. surface treatment method according to claim 1, it is characterised in that blasting treatment described in step S2 with glass sand,
One kind in steel sand or zircon sand at least two is combined as material spray.
7. surface treatment method according to claim 1, it is characterised in that the pressure of blasting treatment is described in step S2
1.0-2.5kg/cm2。
8. surface treatment method according to claim 1, it is characterised in that Al alloy shell in blasting treatment described in step S2
The speed of travel of the non-wire-drawing surface of body is 8-15m/min.
9. processing method according to claim 1, it is characterised in that also carried out after step S2 and before step S3 as follows
Step：
Al-alloy casing after wire drawing process and blasting treatment is carried out ungrease treatment by S21；
Al-alloy casing after ungrease treatment is carried out alkaline etching by S22；
S23 removes caused black film after alkaline etching processing；
Al-alloy casing after removing black film is carried out chemical polishing by S24.
10. surface treatment method according to claim 9, it is characterised in that step S21 is using tertiary sodium phosphate, nonyl phenol
The mixed liquor of APEO and dodecyl sodium sulfate carries out ungrease treatment.
11. surface treatment method according to claim 10, it is characterised in that the concentration of tertiary sodium phosphate is 50-60g/L,
The concentration of NPE is 2-8mL/L, and the concentration of dodecyl sodium sulfate is 0.5-2g/L.
12. surface treatment method according to claim 9, it is characterised in that ungrease treatment is in 50-60 described in step S21
Carried out under the conditions of DEG C.
13. surface treatment method according to claim 9, it is characterised in that the time of ungrease treatment is described in step S21
3-5min。
14. surface treatment method according to claim 9, it is characterised in that step S22 is carried out using sodium hydroxide solution
Alkaline etching processing.
15. surface treatment method according to claim 14, it is characterised in that the concentration of the sodium hydroxide solution is
50-60g/L。
16. surface treatment method according to claim 9, it is characterised in that the temperature of alkaline etching processing is described in step S22
55-65℃。
17. surface treatment method according to claim 9, it is characterised in that the time of alkaline etching processing is described in step S22
5-30s。
18. surface treatment method according to claim 9, it is characterised in that step S23 removes alkaline etching using salpeter solution
Black film after processing.
19. surface treatment method according to claim 18, it is characterised in that the concentration of the salpeter solution is 200-
400mL/L。
20. surface treatment method according to claim 18, it is characterised in that the time of salpeter solution processing is
10-60s。
21. surface treatment method according to claim 9, it is characterised in that chemical polishing described in step S24 phosphoric acid with
Carried out in the mixed liquor of nitric acid.
22. surface treatment method according to claim 21, it is characterised in that the volume basis of phosphoric acid in the mixed liquor
Number is 93%, and the percentage by volume of nitric acid is 7%.
23. surface treatment method according to claim 21, it is characterised in that the phosphoric acid is that weight/mass percentage composition is
98% phosphoric acid, the nitric acid are the nitric acid that weight/mass percentage composition is 68%.
24. surface treatment method according to claim 9, it is characterised in that the time of chemical polishing is described in step S24
5-60s。
25. surface treatment method according to claim 1, it is characterised in that the electricity of anodized described in step S3
Press as 8-16V, current density 1-1.5A/dm2。
26. surface treatment method according to claim 1, it is characterised in that anodized described in step S3 when
Between be 30-60min.
27. surface treatment method according to claim 1, it is characterised in that the thickness of oxidation film layer is described in step S3
5-15μm。
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| CN107326417A (en) * | 2016-04-29 | 2017-11-07 | 北京小米移动软件有限公司 | Make method, metal shell and the terminal device of metal shell |
| CN107338462B (en) * | 2016-04-29 | 2019-11-15 | 北京小米移动软件有限公司 | Make method, metal shell and the terminal device of metal shell |
| CN105792578B (en) * | 2016-04-30 | 2019-07-26 | 维沃移动通信有限公司 | The method of surface finish and electronic equipment of shell |
| CN106808372B (en) * | 2016-12-26 | 2019-04-12 | 广州市亿众金属制品有限公司 | A kind of aluminum alloy surface mechanical processing method |
| CN106826412A (en) * | 2017-03-02 | 2017-06-13 | 秦皇岛中秦渤海轮毂有限公司 | The processing technology of full wire drawing aluminium alloy wheel hub |
| CN107299347A (en) * | 2017-07-12 | 2017-10-27 | 合肥雅克丽新型建材有限公司 | Surface treatment process of aluminum alloy section for doors and windows |
| CN108707941B (en) * | 2018-05-29 | 2021-02-26 | 西安易朴通讯技术有限公司 | Anodic oxide film, preparation method thereof, aluminum alloy shell containing anodic oxide film and mobile phone |
| CN109385656A (en) * | 2018-10-09 | 2019-02-26 | 淮北市硕华机械设备有限公司 | A kind of aluminum alloy surface treatment process |
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| CN112059740B (en) * | 2020-09-29 | 2022-06-17 | 昆山鼎国精密模具有限公司 | Radiation wire drawing process for notebook aluminum shell |
| CN112475784B (en) * | 2020-10-21 | 2022-09-06 | 广东长盈精密技术有限公司 | Processing method for removing black ash on surface of die-casting aluminum alloy, die-casting aluminum alloy and mobile phone shell |
| CN112454183B (en) * | 2020-11-09 | 2022-05-20 | 广东工机智能装备有限公司 | Integral type panel beating box polishing robot |
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