WO2017016154A1 - 通讯设备金属外壳及其制备方法 - Google Patents

通讯设备金属外壳及其制备方法 Download PDF

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Publication number
WO2017016154A1
WO2017016154A1 PCT/CN2015/098306 CN2015098306W WO2017016154A1 WO 2017016154 A1 WO2017016154 A1 WO 2017016154A1 CN 2015098306 W CN2015098306 W CN 2015098306W WO 2017016154 A1 WO2017016154 A1 WO 2017016154A1
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Prior art keywords
metal substrate
metal
slit
decorative layer
communication device
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PCT/CN2015/098306
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English (en)
French (fr)
Inventor
廖重重
陈梁
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比亚迪股份有限公司
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Publication of WO2017016154A1 publication Critical patent/WO2017016154A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave

Definitions

  • the invention relates to a metal casing of a communication device and a preparation method thereof.
  • the mobile phone antenna is a device for receiving signals on a mobile phone.
  • most smart phones are built-in antennas, which requires that the back cover of the mobile phone cannot shield the signal.
  • Plastic mobile phones do not have this problem.
  • how to solve the signal shielding problem is one of the keys to its design and manufacture.
  • metal mobile phones use the method of opening the antenna slot and injection molding to solve the problem of signal shielding of the fuselage, such as the upper and lower antenna slots of HTCONE, the side antenna slots of iphone5/5s, and the like.
  • the above prior art all prevents the shielding of the signal by filling the antenna slot with plastic, but it causes certain damage to the overall structure of the metal mobile phone body, which affects the overall cleanliness and continuity of the appearance.
  • the plastic visible in the outer casing destroys the overall metallic texture of the fuselage.
  • the object of the present invention is to overcome the above problems in the prior art, and to provide a metal casing for a communication device and a preparation method thereof.
  • the metal casing of the communication device provided by the invention has the appearance of the slit (ie, the antenna slot) being invisible, and the appearance of the metal casing is neat, smooth, flat and uniform, and the metal texture is obvious.
  • the present invention provides a metal casing for a communication device, the metal casing of the communication device comprising: a metal substrate; a decorative layer covering the surface of the metal substrate; at least one slit, the narrow Sewing a decorative layer penetrating the metal substrate and the inner surface of the metal substrate; a filling member filling the slit, the decorative layer being electrophoresed, ordinary anodized, porcelain anodized Formed by at least one of micro-arc oxidation and spray coating.
  • the invention also provides a method for preparing a metal casing of a communication device, wherein the method comprises the following steps:
  • the metal casing of the communication device obtained by the method of the invention has a slit for the communication signal to pass through to realize a normal communication function.
  • the metal casing of the communication device provided by the invention has a slit (ie, an antenna slot) which is invisible in appearance, and the metal casing is neat, smooth, flat and uniform, and has a metallic texture.
  • a decorative layer is formed on the surface of the metal substrate by one or more of electrophoresis, general anodizing, porcelain anodizing, micro-arc oxidation, and spraying, and a filler is filled in the slit to significantly increase the hardness thereof. , wear resistance, shock resistance and corrosion resistance.
  • Figure 1 is a schematic illustration of a metal casing of a communication device of the present invention.
  • the invention provides a metal housing for a communication device.
  • the metal housing of the communication device includes: a metal substrate 1; a decorative layer 2, the decorative layer 2 covers a surface of the metal substrate 1, and at least one slit 3, a slit 3 penetrating the metal substrate 1 and the decorative layer 2 on the inner surface of the metal substrate; a filling member 4, the filling member 4 is filled with the slit 3, and the decorative layer 4 may be electrophoresed Formed by at least one of ordinary anodizing, porcelain anodizing, micro-arc oxidation, and spraying.
  • the metal casing of the communication device of the present invention comprises a metal substrate 1, a decorative layer 2, one or more slits 3 and a filler member 4, and the decorative layer 2 covers the metal substrate 1 a surface other than the inner surface slit 3; the slit 3 penetrating the decorative layer 2 on the inner surface of the metal substrate 1 and the metal substrate 1; the filling member 4 is filled
  • the metal casing of the communication device of the present invention may obviously have a plurality of slits.
  • the "surface other than the inner surface slit of the metal substrate” means the outer surface of the metal substrate and the surface other than the slit region of the inner surface of the metal substrate.
  • the communication device may be, for example, a mobile phone, a tablet computer, a notebook computer, a Bluetooth headset, or the like.
  • the metal housing of the communication device is a metal casing of a mobile phone.
  • the inner surface of the metal casing is defined as a surface of the metal casing facing the interior of the communication device when it is used in a communication device. It will be understood that the outer surface of the metal casing is defined as the surface of the metal casing facing the outside when it is used in a communication device. In addition, the inner and outer surfaces of the metal substrate used to prepare the metal outer casing are also applicable to the above definition.
  • the material of the metal substrate may be various metals commonly used in communication equipment in the art, such as aluminum alloy, stainless steel, magnesium alloy or titanium alloy, etc.; some embodiments of the present invention
  • the material of the metal substrate is an aluminum alloy.
  • the thickness of the metal substrate is not particularly limited, and those skilled in the art can appropriately select according to a specific communication device.
  • the metal substrate has a thickness of 0.2 to 0.6 mm, and in some embodiments of the invention, the metal substrate has a thickness of 0.3 to 0.5 mm.
  • the slit is used to ensure signal transmission between the antenna and the outside world to realize communication.
  • the slit width may be from 0.2 to 1 mm, and in some embodiments of the invention, the slit width is from 0.2 to 0.9 mm, and in some embodiments of the invention, the slit width is from 0.2 to 0.8 mm. In some embodiments of the invention, the slit width is from 0.2 to 0.7 mm.
  • the slit length may be from 10 to 60 mm, and in some embodiments of the invention, the slit length is from 10 to 40 mm.
  • the number of slits is not particularly limited as long as communication can be realized, for example, 1 to 200, and in some embodiments of the present invention, the number of slits is 5 to 50.
  • the spacing between adjacent slits may be 2-6 mm. In some embodiments of the invention, the spacing between adjacent slits is 4-5 mm.
  • the width, length and spacing of the slits described in the present invention refer to the width, length and spacing of the slits on the outer surface of the metal substrate.
  • the interval between adjacent two slits means the distance between the center lines of the adjacent two slits.
  • the shape of the slit is not particularly limited, and may be, for example, a straight line, a curved shape, a square wave line shape or a zigzag line shape. In some embodiments of the present invention, the shape of the slit is Straight line.
  • the decorative layer covers the entire surface of the metal substrate, that is, the metal shell of the communication device further has a metal a decorative layer on the outer surface of the substrate, the decorative layer covering the slit at the outer surface.
  • the decorative layer may be formed by one or more of electrophoresis, anodization, micro-arc oxidation, and spray coating.
  • the thickness of the decorative layer is not particularly limited and may be a conventional thickness in the art.
  • the decorative layer may have a thickness of 15 to 35 ⁇ m, and in some embodiments of the invention, the decorative layer has a thickness of 25 to 35 ⁇ m.
  • the slit is filled with a filler formed by filling the slit with glue and solidifying.
  • the glue is a UV glue.
  • the specific type of the UV glue is not particularly limited, and may be, for example, a 3211 model UV glue purchased from Loctite Corporation.
  • the invention also provides a method for preparing a metal casing of the above communication device, wherein the method comprises the following steps: 1) on the surface of the metal substrate by at least one of electrophoresis, general anodizing, porcelain anodizing, micro-arc oxidation and spraying.
  • Forming a decorative layer 1) forming a UV ink layer on the decorative layer; 3) forming at least one opening on the UV ink layer of the inner surface of the metal substrate, the opening penetrating the UV of the inner surface of the metal substrate An ink layer and a decorative layer; 4) etching a metal substrate corresponding to the opening to form a slit penetrating the metal substrate; 5) removing the UV ink layer; 6) filling the slit with UV Glue and cure.
  • the method for preparing the metal casing of the above communication device may include the following steps:
  • the thickness of the metal substrate is not particularly limited, and those skilled in the art may The selection is made appropriately according to the specific communication equipment.
  • the metal substrate may have a thickness of 0.2-0.6 mm, and in some embodiments of the invention, the metal substrate has a thickness of 0.3-0.5 mm.
  • a decorative layer is formed on the surface of the metal substrate for decorative and protective purposes.
  • the decorative layer can be carried out by conventional methods and conditions in the art.
  • a decorative layer can be formed on the surface of the metal substrate by one or more of electrophoresis, general anodizing, porcelain anodizing, micro-arc oxidation and spraying. .
  • the decorative layer may have a thickness of 15 to 35 ⁇ m, and in some embodiments of the invention, the decorative layer has a thickness of 25 to 35 ⁇ m.
  • the conditions of the electrophoresis may include: a temperature of 28-32 ° C, a voltage of 140-200 V, a time of 1-3 min, and a pH of 7-9.
  • the electrophoresis liquid to be used may be an electrophoretic liquid containing a matt paint (WNO-1) of Nippon Seisakusho Co., Ltd. and a varnish (NNO-4) of Nippon Seisakusho Co., Ltd., and a matt paint of Japan Shimizu Co., Ltd. (WNO- 1) The weight ratio of varnish (NNO-4) of Japan Shimizu Co., Ltd.
  • the electrophoretic fluid may be 0-4:1, and in some embodiments of the present invention, matte lacquer (WNO-1) of Japan Shimizu Corporation and Japan The varnish (NNO-4) of Shimizu Corporation has a weight ratio of 7:3. Additionally, the electrophoretic fluid may have a solids content of from 8 to 15% by weight. In some embodiments of the invention, the electrophoretic fluid has a solids content of 13% by weight.
  • the thickness of the decorative layer formed by the above electrophoresis method is usually 25 to 35 ⁇ m.
  • the conditions of the ordinary anodization may include an anode voltage of 13-17 V, a temperature of 17-21 ° C, and an oxidation time of 30-60 min.
  • the anodizing solution is sulfuric acid having a concentration of 180 to 200 g/L.
  • the thickness of the decorative layer formed by the above anodizing method is usually 15 to 25 ⁇ m.
  • the conditions of the porcelain anodization may include a voltage of 80-120 V, an oxidation time of 30-60 min, and an oxidation temperature of 30-50 °C.
  • the porcelain anolyte may contain 40-50 g/L potassium titanium oxalate, 1-4 g/L oxalic acid, 6-10 g/L boric acid, and 0.5-2 g/L citric acid.
  • the thickness of the decorative layer formed by the above-described ceramic anodizing method is usually 15 to 30 ⁇ m.
  • the conditions of the micro-arc oxidation may include: an oxidation temperature of 20-30 ° C, an oxidation forward voltage of 400-600 V, and an oxidation time of 40-100 min.
  • the micro-arc oxidation electrolyte may contain 0.02-0.05 mol/L sodium silicate and 0.03-0.07 mol/L sodium hydroxide.
  • the thickness of the decorative layer formed by the above micro-arc oxidation method is usually 15 to 40 ⁇ m.
  • the spraying refers to spraying an organic or inorganic coating on the surface of the metal substrate by spraying one or more layers of a strong alkali etching solution for more than 40 minutes, and the coating thickness can be controlled to be 10-50 ⁇ m.
  • the sprayed coating can be, for example, an epoxy resin.
  • the metal substrate in the step 1), before the decorative layer is formed on the surface of the metal substrate, the metal substrate may be pretreated to treat surface contamination and improve surface gloss.
  • the method of pre-processing can be performed by the following steps:
  • the metal substrate is alkali-etched in an alkali etching solution for 1-2 min, and then washed twice with deionized water;
  • the concentration of the alkali etching solution is 15-20 g/L sodium hydroxide aqueous solution; the concentration of the light emitting liquid is 200-300 ml/L aqueous solution of nitric acid; And a solution of sulfuric acid, wherein the content of phosphoric acid may be 650-750 ml/L, and the content of sulfuric acid may be 350-250 ml/L.
  • a UV ink layer is formed on the decorative layer on the surface of the metal substrate.
  • a method of forming a UV ink layer on a decorative layer on a surface of the metal substrate may employ various methods and conditions commonly used in the art, such as a decorative layer on the surface of the metal substrate.
  • the UV ink was sprayed on, and then baked at 70-90 ° C for 20-30 minutes, followed by UV exposure.
  • the above UV ink may use various UV inks commonly used in the art, for example, may be a 5680 series UV ink.
  • the thickness of the ink layer formed by the above method may be 30-50 ⁇ m, and in some embodiments of the present invention, the thickness of the ink layer is 35-45 ⁇ m.
  • At least one opening is formed on the UV ink layer of the inner surface of the metal substrate, the opening penetrating the UV ink layer and the decorative layer, that is, At least one (or more than one) opening is formed on the decorative layer and the UV ink layer on the inner surface side of the metal substrate, the opening penetrating through the decorative layer and the UV ink layer on the inner surface side of the metal substrate and exposed
  • the inner surface of the metal substrate is metal.
  • a method of forming one or more openings on the decorative layer and the UV ink layer on the inner surface side of the metal substrate is not particularly limited, and various methods commonly used in the art may be employed, for example, Laser engraving, exposure and development methods are formed.
  • the conditions of the laser engraving and exposure development may be such that one or more openings can be formed on the decorative layer and the UV ink layer on the inner surface side of the metal substrate, and the metal on the inner surface of the metal substrate can be exposed.
  • General conditions in the field may be used in the art.
  • the opening formed on the decorative layer and the UV ink layer on the inner surface side of the metal substrate may have a width of 30 to 150 ⁇ m, and in some embodiments of the present invention, the width of the opening It is 30-100 ⁇ m. In some embodiments of the invention, the opening has a width of 30-60 [mu]m.
  • the length of the opening formed on the decorative layer and the UV ink layer on the inner surface side of the metal substrate is 10-60 mm, and in some embodiments of the present invention, the length of the opening is 10-40mm.
  • the number of the openings is not particularly limited, and may be, for example, 1 to 200. In some embodiments of the present invention, the open strips The number is 5-50.
  • the spacing between adjacent two slits may be 2-6 mm, in some embodiments of the present invention , the spacing between two adjacent slits is 4-5mm
  • the shape of the opening is not particularly limited and may be a straight line, a curved shape, a square wave line shape or a zigzag line shape, and in some embodiments of the present invention, the shape of the opening is a straight line.
  • step 4 the metal substrate corresponding to the opening is etched to form a slit penetrating the metal substrate, or after exposing the metal surface of the metal substrate A portion through which the metal substrate is exposed to expose the metal on the inner surface of the metal substrate is etched to form a slit penetrating the metal substrate on the metal substrate.
  • the etching comprises an acidic etchant etch and an alkaline etchant etch.
  • the acidic etching solution is etched to etch away a substantial portion of the metal layer corresponding to the slit to expose the decorative layer on the outer surface of the metal substrate; the alkaline etching solution is etched to remove residual metal .
  • the acidic etching solution is a solution containing ferric chloride, hydrochloric acid and water, wherein the ferric chloride may be 550-600 g and the hydrochloric acid may be 30-50 g with respect to 100 g of water, etching.
  • the conditions may be such that, in some embodiments of the invention, the etching conditions include a temperature of 10-35 ° C and a time of 5-15 minutes.
  • the alkaline etching solution contains sodium hydroxide, sodium carbonate and sodium nitrate.
  • the content of the sodium hydroxide may be 50-60 g/L
  • the content of sodium carbonate may be 50-60 g/L
  • the content of sodium nitrate may be 50-60 g/L.
  • the etching conditions may be as long as the above objects are satisfied.
  • the etching conditions include a temperature of 10-35 ° C and a time of 30-80 minutes. In some embodiments of the invention, the etching time is between 35 and 75 minutes.
  • the method further comprises the steps of: washing with water, stripping the black film, and then washing with water after the etching of the acidic etching solution and the etching of the alkaline etching solution, respectively.
  • the purpose of the black stripping film is to remove the dirt in the slit by the method and the condition that in a 20-30% by volume nitric acid solution at a temperature of 10-35 ° C, Soak for 1-2min.
  • a slit of the range described above can be obtained on a metal substrate by performing etching under the above conditions.
  • a step of removing the UV ink layer on the surface of the metal substrate is performed.
  • the method of removing the UV ink layer on the surface of the metal substrate can be carried out by various methods commonly used in the art, for example, a paint stripping method can be used to remove the UV of the surface of the metal substrate.
  • a paint stripping method can be used to remove the UV of the surface of the metal substrate.
  • the paint stripper may be, for example, a paint stripper of the SH-665 model purchased from Dongguan Sihui Surface Treatment Technology Co., Ltd.
  • the soaking time is usually 10-20 min.
  • the step of water washing and drying the resulting metal substrate may be included.
  • a step of filling the slit of the metal substrate with UV glue and curing is performed.
  • the UV glue may be various UV glues commonly used in the art, and the UV glue may be, for example, a 3211 model UV glue purchased from Loctite Corporation. Further, the curing method of the UV glue may be carried out by a conventional method in the art, for example, ultraviolet exposure.
  • Aluminum alloy (purchased from Dongguan Gangxiang Metal Materials Co., Ltd., grade 6063, thickness 0.4mm) was cut into a size of 15mm ⁇ 80mm as a metal substrate.
  • the metal substrate was alkali-etched in an alkali etching solution (60 g/L sodium hydroxide aqueous solution) at 50 ° C for 2 min, and then washed twice with deionized water; then, at 25 ° C, in the light-emitting liquid (25 ml / After 4 min of light in L-nitrate aqueous solution, it was washed twice with deionized water; then, after polishing for 20 s at 25 ° C in a liquid polishing solution (a solution consisting of 650 ml/L phosphoric acid and 350 ml/L sulfuric acid), It was washed twice with deionized water; then dried at 80 ° C for 20 min to obtain a metal substrate after washing and drying.
  • an alkali etching solution 60 g/L sodium hydroxide aqueous solution
  • Spraying 5680 series UV ink (purchased from Shenzhen Wanjiayuan Jinghua Technology Co., Ltd.) on the decorative layer on the surface side of the metal substrate, baking at 80 ° C for 25 minutes, UV exposure (exposure conditions are The time was 2 min, and the ultraviolet light intensity was 800 mJ/cm 2 ), thereby forming a UV ink layer having a thickness of 40 ⁇ m.
  • the openings are six, and the shape is linear, the opening width is 30 ⁇ m, the opening length is 19 mm, and the adjacent opening pitch is 4 mm.
  • the metal substrate obtained in the step 3) is subjected to an acid etching solution etching, followed by water washing, black peeling, and water washing.
  • the acidic etching solution is a mixed solution of 550 g of ferric chloride, 30 g of hydrochloric acid and 100 g of water
  • the conditions of the etching of the acidic etching solution include: a temperature of 30 ° C, a time of 10 minutes; and a method and conditions for stripping the black film For 1 min in a 25% by volume aqueous solution of nitric acid.
  • the obtained metal substrate is further subjected to alkaline etching liquid etching, followed by water washing, black peeling, and water washing.
  • the alkaline etching solution is a mixed aqueous solution containing sodium hydroxide, sodium carbonate and sodium nitrate (the content of sodium hydroxide, sodium carbonate and sodium nitrate is 50 g/L), and the conditions of the alkaline etching solution are etched. Including: the temperature was 30 ° C, the time was 39 minutes; the method and conditions for stripping the black film were to soak for 1 min in a 25% by volume aqueous solution of nitric acid.
  • a slit was formed on the metal substrate obtained by the above etching, and the slit had a width of 0.2 mm on the outer surface of the metal substrate, a length of 20 mm, and a pitch of 4 mm between adjacent slits.
  • paint stripper is a paint stripper of SH-665 model of Dongguan Sihui Surface Treatment Technology Co., Ltd., soaking time is 15 minutes).
  • the metal casing of the communication device prepared as described above has a structure in which a metal substrate has a slit, and the decorative layer covers a surface other than the slit of the inner surface of the metal substrate; the slit penetrates the metal substrate and the metal a decorative layer on the inner surface of the substrate; the filler member fills the slit.
  • the metal casing of the communication device has a slit (ie, an antenna slot) that is invisible in appearance, and the metal casing is neat, smooth, uniform, and has a metallic texture.
  • Aluminum alloy (purchased from Dongguan Gangxiang Metal Materials Co., Ltd., grade 6063, thickness 0.4mm) was cut into a size of 15mm ⁇ 80mm as a metal substrate.
  • the metal substrate was alkali-etched in an alkali etching solution (60 g/L sodium hydroxide aqueous solution) at 50 ° C for 2 min, and then washed twice with deionized water; then, at 25 ° C, in the light-emitting liquid (25 ml / After 4 min of light in L-nitrate aqueous solution, it was washed twice with deionized water; then, after polishing for 20 s at 25 ° C in a liquid polishing solution (a solution consisting of 650 ml/L phosphoric acid and 350 ml/L sulfuric acid), It was washed twice with deionized water; then dried at 80 ° C for 20 min to obtain a metal substrate after washing and drying.
  • an alkali etching solution 60 g/L sodium hydroxide aqueous solution
  • a decorative layer having a thickness of 20 ⁇ m was obtained by anodization.
  • the conditions of anodization were: an anode voltage of 15 V, a temperature of 19 ° C, and an oxidation time of 50 min.
  • the anodizing solution was sulfuric acid having a concentration of 190 g/L.
  • Spraying 5680 series UV ink (purchased from Shenzhen Wanjiayuan Jinghua Technology Co., Ltd.) on the decorative layer on the surface side of the metal substrate, baking at 80 ° C for 25 minutes, UV exposure (exposure conditions are The time was 2 min, and the ultraviolet light intensity was 800 mJ/cm 2 ), thereby forming a UV ink layer having a thickness of 40 ⁇ m.
  • the openings are six, and the shape is a linear shape, the opening width is 30 ⁇ m, the opening length is 39 mm, and the adjacent opening pitch is 5 mm.
  • the metal substrate obtained in the step 3) is subjected to an acid etching solution etching, followed by water washing, black peeling, and water washing.
  • the acidic etching solution is a mixed solution of 550 g of ferric chloride, 30 g of hydrochloric acid and 100 g of water
  • the conditions of the etching of the acidic etching solution include: a temperature of 30 ° C, a time of 10 minutes; and a method and conditions for stripping the black film For 1 min in a 25% by volume aqueous solution of nitric acid.
  • the obtained metal substrate is further subjected to alkaline etching liquid etching, followed by water washing, black peeling, and water washing.
  • the alkaline etching solution is a mixed aqueous solution containing sodium hydroxide, sodium carbonate and sodium nitrate (the content of sodium hydroxide, sodium carbonate and sodium nitrate is 50 g/L), and the conditions of the alkaline etching solution are etched. Including: the temperature is 30 ° C, the time is 50 minutes; the method and conditions of stripping the black film are 1 minute in a 25% volume fraction of aqueous nitric acid solution.
  • a slit was formed on the metal substrate obtained by the above etching, and the slit had a width of 0.35 mm on the outer surface of the metal substrate, a length of 40 mm, and a pitch of 5 mm between the adjacent slits.
  • the slit of the metal substrate was filled with glue (purchased by Loctite's Model 3211 UV glue) and cured under ultraviolet light intensity of 800 mJ/cm 2 to obtain a metal casing of a communication device.
  • glue purchased by Loctite's Model 3211 UV glue
  • the metal casing of the communication device prepared as described above has a structure in which a metal substrate has a slit, and the decorative layer covers a surface other than the slit of the inner surface of the metal substrate; the slit penetrates the metal substrate and the metal a decorative layer on the inner surface of the substrate; the filler member fills the slit.
  • the metal casing of the communication device has a slit (ie, an antenna slot) that is invisible in appearance, and the metal casing is neat, smooth, uniform, and has a metallic texture.
  • Aluminum alloy (purchased from Dongguan Gangxiang Metal Materials Co., Ltd., grade 6063, thickness 0.4mm) Cut into a size of 15 mm ⁇ 80 mm as a metal substrate.
  • the metal substrate was alkali-etched in an alkali etching solution (60 g/L sodium hydroxide aqueous solution) at 50 ° C for 2 min, and then washed twice with deionized water; then, at 25 ° C, in the light-emitting liquid (25 ml / After 4 min of light in L-nitrate aqueous solution, it was washed twice with deionized water; then, after polishing for 20 s at 25 ° C in a liquid polishing solution (a solution consisting of 650 ml/L phosphoric acid and 350 ml/L sulfuric acid), It was washed twice with deionized water; then dried at 80 ° C for 20 min to obtain a metal substrate after washing and drying.
  • an alkali etching solution 60 g/L sodium hydroxide aqueous solution
  • a decorative layer having a thickness of 35 ⁇ m was obtained by porcelain anodization.
  • the condition of porcelain anodization is a voltage of 100 V, an oxidation time of 50 min, and an oxidation temperature of 40 °C.
  • the porcelain anolyte contained 15 g/L of potassium oxalate, 9 g/L of oxalic acid, 8 g/L of boric acid, and 1 g/L of citric acid.
  • Spraying 5680 series UV ink (purchased from Shenzhen Wanjiayuan Jinghua Technology Co., Ltd.) on the decorative layer on the surface side of the metal substrate, baking at 80 ° C for 25 minutes, UV exposure (exposure conditions are The time was 2 min, and the ultraviolet light intensity was 800 mJ/cm 2 ), thereby forming a UV ink layer having a thickness of 40 ⁇ m.
  • the opening is six, and the shape is a linear shape, the opening width is 30 ⁇ m, the opening length is 39 mm, and the adjacent opening pitch is 4 mm.
  • the metal substrate obtained in the step 3) is subjected to an acid etching solution etching, followed by water washing, black peeling, and water washing.
  • the acidic etching solution is a mixed solution of 550 g of ferric chloride, 30 g of hydrochloric acid and 100 g of water
  • the conditions of the etching of the acidic etching solution include: a temperature of 30 ° C, a time of 10 minutes; and a method and conditions for stripping the black film For 1 min in a 25% by volume aqueous solution of nitric acid.
  • the obtained metal substrate is further subjected to alkaline etching liquid etching, followed by water washing, black peeling, and water washing.
  • the alkaline etching solution is a mixed aqueous solution containing sodium hydroxide, sodium carbonate and sodium nitrate (the content of sodium hydroxide, sodium carbonate and sodium nitrate is 50 g/L), and the conditions of the alkaline etching solution are etched. Including: the temperature was 30 ° C, the time was 61 minutes; the method and conditions of stripping the black film were to soak for 1 min in a 25% by volume aqueous solution of nitric acid.
  • a slit was formed on the metal substrate obtained by the above etching, and the slit had a width of 0.5 mm on the outer surface of the metal substrate, a length of 40 mm, and a pitch of 4 mm between adjacent slits.
  • the slit of the metal substrate was filled with glue (purchased by Loctite Corporation's Model 3211 UV glue) and cured under ultraviolet light intensity of 800 mJ/cm 2 to obtain a metal casing for a communication device.
  • glue purchased by Loctite Corporation's Model 3211 UV glue
  • the metal casing of the communication device prepared as described above has a structure in which a metal substrate has a slit, and the decorative layer covers a surface other than the slit of the inner surface of the metal substrate; the slit penetrates the metal substrate and the metal a decorative layer on the inner surface of the substrate; the filler member fills the slit.
  • the metal casing of the communication device has a slit (ie, an antenna slot) that is invisible in appearance, and the metal casing is neat, smooth, uniform, and has a metallic texture.
  • Aluminum alloy (purchased from Dongguan Gangxiang Metal Materials Co., Ltd., grade 6063, thickness 0.4mm) was cut into a size of 15mm ⁇ 80mm as a metal substrate.
  • the metal substrate was alkali-etched in an alkali etching solution (60 g/L sodium hydroxide aqueous solution) at 50 ° C for 2 min, and then washed twice with deionized water; then, at 25 ° C, in the light-emitting liquid (25 ml / After 4 min of light in L-nitrate aqueous solution, it was washed twice with deionized water; then, after polishing for 20 s at 25 ° C in a liquid polishing solution (a solution consisting of 650 ml/L phosphoric acid and 350 ml/L sulfuric acid), It was washed twice with deionized water; then dried at 80 ° C for 20 min to obtain a metal substrate after washing and drying.
  • an alkali etching solution 60 g/L sodium hydroxide aqueous solution
  • a decorative layer having a thickness of 30 ⁇ m was obtained by micro-arc oxidation.
  • the conditions of micro-arc oxidation are: oxidation temperature is 30 ° C, oxidation forward voltage is 600 V, and oxidation time is 40 min.
  • the micro-arc oxidation electrolyte was a solution containing 0.03 mol/L sodium silicate and 0.05 mol/L sodium hydroxide.
  • Spraying 5680 series UV ink (purchased from Shenzhen Wanjiayuan Jinghua Technology Co., Ltd.) on the decorative layer on the surface side of the metal substrate, baking at 80 ° C for 25 minutes, UV exposure (exposure conditions are The time was 2 min, and the ultraviolet light intensity was 800 mJ/cm 2 ), thereby forming a UV ink layer having a thickness of 40 ⁇ m.
  • the opening is six, and the shape is a linear shape, the opening width is 30 ⁇ m, the opening length is 49 mm, and the adjacent opening pitch is 4 mm.
  • the metal substrate obtained in the step 3) is subjected to an acid etching solution etching, followed by water washing, black peeling, and water washing.
  • the acidic etching solution is a mixed solution of 550 g of ferric chloride, 30 g of hydrochloric acid and 100 g of water
  • the conditions of the etching of the acidic etching solution include: a temperature of 30 ° C, a time of 10 minutes; and a method and conditions for stripping the black film For 1 min in a 25% by volume aqueous solution of nitric acid.
  • the obtained metal substrate is further subjected to alkaline etching liquid etching, followed by water washing, black peeling, and water washing.
  • the alkaline etching solution is a mixed aqueous solution containing sodium hydroxide, sodium carbonate and sodium nitrate (the content of sodium hydroxide, sodium carbonate and sodium nitrate is 50 g/L), and the conditions of the alkaline etching solution are etched. Including: the temperature is 30 ° C, the time is 72 minutes; the method and conditions of stripping the black film is to soak for 1 min in a 25% by volume aqueous solution of nitric acid.
  • a slit was formed on the metal substrate obtained by the above etching, and the slit had a width of 0.65 mm on the outer surface of the metal base material, a length of 50 mm, and a pitch of 4 mm between adjacent slits.
  • the slit of the metal substrate was filled with glue (purchased by Loctite's Model 3211 UV glue) and cured under ultraviolet light intensity of 800 mJ/cm 2 to obtain a metal casing of a communication device.
  • glue purchased by Loctite's Model 3211 UV glue
  • the metal casing of the communication device prepared as described above has a structure in which a metal substrate has a slit, and the decorative layer covers a surface other than the slit of the inner surface of the metal substrate; the slit penetrates the metal substrate and the metal a decorative layer on the inner surface of the substrate; the filler member fills the slit.
  • the metal casing of the communication device has a slit (ie, an antenna slot) that is invisible in appearance, and the metal casing is neat, smooth, uniform, and has a metallic texture.
  • the metal casing of the communication device obtained by the method of the invention has a slit (ie, an antenna slot) that is invisible in appearance, and the metal casing is neat, smooth, uniform, and has a metallic texture.
  • a decorative layer is formed on the surface of the metal substrate by one or more of electrophoresis, general anodizing, porcelain anodizing, micro-arc oxidation, and spraying, and a filler is filled in the slit to significantly increase the hardness thereof. , wear resistance, shock resistance and corrosion resistance.

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Abstract

提供了通讯设备金属外壳及其制备方法。该通讯设备金属外壳包括金属底材、形成在金属底材表面的装饰层、至少一条贯穿金属底材和金属底材内表面的装饰层的狭缝和填充满狭缝的填充件，其中，装饰层是通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的至少一种形成的。

Description

通讯设备金属外壳及其制备方法 技术领域
本发明涉及通讯设备金属外壳及其制备方法。
背景技术
手机天线是手机上用于接收信号的设备，目前智能手机多为内置天线，这就要求手机后盖不能对信号起屏蔽作用。塑胶手机不存在此问题，对于正在兴起的热门-金属机身手机，如何解决信号屏蔽问题是其设计制造的关键之一。
目前，金属手机多采用开天线槽并注塑的方法解决其机身信号屏蔽的问题，如HTCONE的上下两条天线槽，iphone5/5s的侧边天线槽等。上述现有技术均通过在天线槽中填充塑料来防止信号的屏蔽，但是对金属手机机身整体结构造成了一定破坏，影响了其外观整体的整洁性及连续性。同时外壳可见的塑胶破坏了机身的整体金属质感。
发明内容
本发明的目的在于克服上述现有技术中存在的问题，提供一种通讯设备金属外壳及其制备方法。本发明提供的通讯设备金属外壳其狭缝(即天线槽)外观不可见，金属外壳表观整洁光滑平整一致，且金属质感明显。
为了实现上述目的，本发明提供一种通讯设备金属外壳，该通讯设备金属外壳包括：金属底材；装饰层、所述装饰层覆盖所述金属底材的表面；至少一条狭缝，所述狭缝贯穿所述金属底材和所述金属底材内表面上的装饰层；填充件，所述填充件填充满所述狭缝，所述装饰层是通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的至少一种形成的。
本发明还提供一种通讯设备金属外壳的制备方法，其中，该方法包括以下步骤：
1)通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的至少一种在金属底材表面形成装饰层；
2)在所述装饰层上形成UV油墨层；
3)在所述金属底材内表面的UV油墨层上形成至少一条开口，所述开口贯穿所述金属底材内表面的UV油墨层和装饰层；
4)对所述开口对应的金属底材进行蚀刻，形成贯穿所述金属底材的狭缝；
5)除去所述UV油墨层；
6)在所述狭缝中填充UV胶水并使其固化。
通过本发明的方法得到的通讯设备金属外壳具有狭缝，可供通讯信号穿过，实现正常的通讯功能。并且，本发明提供的通讯设备金属外壳其狭缝(即天线槽)外观不可见，金属外壳表观整洁光滑平整一致，且金属质感明显。并且，通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的一种或多种在金属底材的表面形成装饰层，在狭缝内填有填充件，能够显著提高其硬度、耐磨、抗震及耐蚀性能。
本发明的其它特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图是用来提供对本发明的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本发明，但并不构成对本发明的限制。在附图中：
图1是本发明的通讯设备金属外壳的示意图。
附图标记说明
1 金属底材
2 装饰层
3 狭缝
4、填充件(UV胶水形成)
具体实施方式
以下对本发明的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。
在本发明的一个方面，本发明提供了一种通讯设备金属外壳。根据本发明的实施例，参照图1，该通讯设备金属外壳包括：金属底材1；装饰层2、所述装饰层2覆盖所述金属底材1的表面；至少一条狭缝3，所述狭缝3贯穿所述金属底材1和所述金属底材内表面上的装饰层2；填充件4，所述填充件4填充满所述狭缝3，所述装饰层4可以是通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的至少一种形成的。
换句话说，如图1所示，本发明的通讯设备金属外壳包括金属底材1、装饰层2、一条以上的狭缝3和填充件4，所述装饰层2覆盖所述金属底材1的内表面狭缝3以外的表面；所述狭缝3贯穿所述金属底材1和金属底材1内表面上的装饰层2；所述填充件4填充满 所述狭缝3，其中，所述装饰层2通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的一种或多种而形成。
另外，需要指出的是，虽然在图1中示意地仅表示了一条狭缝，但本发明的通讯设备金属外壳显然可以具有多条狭缝。
在本发明中，“所述金属底材的内表面狭缝以外的表面”是指金属底材的外表面以及金属底材内表面的狭缝区域以外的表面。
根据本发明的实施例，所述通讯设备例如可以为：手机、平板电脑、笔记本电脑、蓝牙耳机等。在本发明的一些实施例中，所述通讯设备金属外壳为手机金属外壳。
在本发明中，所述金属外壳的内表面定义为将其用于通讯设备中时，金属外壳朝向通讯设备内部的表面。可以理解的是，金属外壳的外表面定义为将其用于通讯设备中时，金属外壳朝向外界的表面。另外，用于制备金属外壳的金属底材的内外表面也适用于上述定义。
根据本发明的实施例，所述金属底材的材质可以为本领域通常用于通讯设备的各种金属，例如可以为铝合金、不锈钢、镁合金或钛合金等；在本发明的一些实施例中，所述金属底材的材质为铝合金。
根据本发明的实施例，所述金属底材的厚度没有特别的限定，本领域技术人员可以根据具体的通讯设备适当地进行选择。例如所述金属底材的厚度为0.2-0.6mm，在本发明的一些实施例中，所述金属底材的厚度为0.3-0.5mm。
根据本发明的实施例，所述狭缝用于保证天线与外界的信号传输，实现通讯。对于上述狭缝，狭缝宽度可以为0.2-1mm，在本发明的一些实施例中，狭缝宽度为0.2-0.9mm，在本发明的一些实施例中，狭缝宽度为0.2-0.8mm，在本发明的一些实施例中，狭缝宽度为0.2-0.7mm。根据本发明的实施例，狭缝长度可以为10-60mm，在本发明的一些实施例中，狭缝长度为10-40mm。另外，狭缝的条数没有特别的限定，只要能够实现通讯即可，例如可以为1-200条，在本发明的一些实施例中，狭缝的条数为5-50条。当所述狭缝为多条时，相邻两条缝隙之间的间距可以为2-6mm，在本发明的一些实施例中，相邻两条缝隙之间的间距为4-5mm。
在本发明中所描述的狭缝的宽度、长度和间距是指狭缝在金属底材外表面上的宽度、长度和间距。
另外，在本发明中，相邻两条缝隙之间的间距是指相邻两条狭缝中心线之间的距离。
根据本发明的实施例，所述狭缝的形状不受特别限制，例如可以为直线形、曲线形、方波线形或锯齿线形，在本发明的一些实施例中，所述狭缝的形状为直线形。
根据本发明的实施例，对于上述缝隙的具体宽度、间距、长度、条数和形状，本领域技术人员可通过实际需要实现的通讯信号类别及频率等条件在上述范围内进行调整，具体调整方法是本领域公知的，在本发明中不再赘述。
根据本发明的实施例，出所述狭缝对应的金属底材的内表面外，所述装饰层覆盖所述金属底材的整个表面，也就是说，所述通讯设备金属外壳还具有位于金属底材外表面的装饰层，所述装饰层在外表面覆盖所述狭缝。
根据本发明的实施例，上述装饰层可以通过电泳、阳极氧化、微弧氧化和喷涂中的一种或多种形成。
根据本发明的实施例，所述装饰层的厚度没有特别的限定，可以为本领域的常规厚度。例如所述装饰层的厚度可以为15-35μm，在本发明的一些实施例中，所述装饰层的厚度为25-35μm。
根据本发明的实施例，所述狭缝中填充有填充件，所述填充件通过在所述狭缝中填充胶水并固化而形成。在本发明的一些实施例中，所述胶水为UV胶水。所述UV胶水的具体种类不受特别限制，例如可以为购于乐泰公司的3211型号的UV胶水。
本发明还提供上述通讯设备金属外壳的制备方法，其中，该方法包括以下步骤：1)通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的至少一种在金属底材表面形成装饰层；2)在所述装饰层上形成UV油墨层；3)在所述金属底材内表面的UV油墨层上形成至少一条开口，所述开口贯穿所述金属底材内表面的UV油墨层和装饰层；4)对所述开口对应的金属底材进行蚀刻，形成贯穿所述金属底材的狭缝；5)除去所述UV油墨层；6)在所述狭缝中填充UV胶水并使其固化。
换句话说，上述通讯设备金属外壳的制备方法可以包括以下步骤：
1)通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的一种或多种在金属底材表面形成装饰层的步骤；
2)在位于所述金属底材表面的装饰层上形成UV油墨层的步骤；
3)在位于所述金属底材内表面侧的装饰层和UV油墨层上形成一条以上的狭缝以露出所述金属底材内表面金属的步骤；
4)对步骤3)得到的金属底材进行蚀刻，以在所述金属底材上形成贯穿所述金属底材的狭缝的步骤；
5)除去所述金属底材表面的UV油墨层的步骤；
6)在所述金属底材的狭缝中填充胶水并固化的步骤。
根据本发明的实施例，所述金属底材的厚度没有特别的限定，本领域技术人员可以根 据具体的通讯设备适当地进行选择。例如所述金属底材的厚度可以为0.2-0.6mm，在本发明的一些实施例中，所述金属底材的厚度为0.3-0.5mm。
根据本发明的实施例，出于装饰性和保护性的目的，在金属底材表面形成装饰层。所述装饰层可以采用本领域的常规方法和条件进行，例如可以通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的一种或多种在金属底材的表面形成装饰层。
根据本发明的实施例，所述装饰层的厚度可以为15-35μm，在本发明的一些实施例中，所述装饰层的厚度为25-35μm。
根据本发明的实施例，所述电泳的条件可以包括：温度为28-32℃，电压为140-200V，时间为1-3min，pH为7-9。采用的电泳液可以为含有日本清水株式会社的哑光漆(WNO-1)和日本清水株式会社的亮光漆(NNO-4)的电泳液，其中，日本清水株式会社的哑光漆(WNO-1)和日本清水株式会社的亮光漆(NNO-4)的重量比可以为0-4：1，在本发明的一些实施例中，日本清水株式会社的哑光漆(WNO-1)和日本清水株式会社的亮光漆(NNO-4)的重量比为7：3。另外，电泳液的固含量可以为8-15重量％，在本发明的一些实施例中，电泳液的固含量为13重量％。通过上述电泳方法形成的装饰层厚度通常为25-35μm。
根据本发明的实施例，所述普通阳极氧化的条件可以包括：阳极电压为13-17V，温度为17-21℃，氧化时间为30-60min。另外，阳极氧化液为浓度为180-200g/L的硫酸。通过上述阳极氧化方法形成的装饰层厚度通常为15-25μm。
根据本发明的实施例，所述瓷质阳极氧化的条件可以包括：电压为80-120V，氧化时间为30-60min，氧化温度为30-50℃。另外，瓷质阳极电解液可以含有40-50g/L草酸钛钾、1-4g/L草酸、6-10g/L硼酸以及0.5-2g/L柠檬酸。通过上述瓷质阳极氧化方法形成的装饰层厚度通常为15-30μm。
根据本发明的实施例，所述微弧氧化的条件可以包括：氧化温度为20-30℃，氧化正向电压：400-600V，氧化时间40-100min。另外，微弧氧化电解液可以含有0.02-0.05mol/L硅酸钠和0.03-0.07mol/L氢氧化钠。通过上述微弧氧化方法形成的装饰层厚度通常为15-40μm。
根据本发明的实施例，所述喷涂是指在金属底材的表面喷涂一层或多层耐强碱蚀刻液腐蚀40min以上的有机或无机物涂层，涂层厚度可以控制在10-50μm。所述喷涂的涂料例如可以为环氧树脂。
根据本发明的实施例，在步骤1)中，在金属底材的表面形成装饰层之前，可以对所述金属底材进行前处理，以处理表面脏污及提高表面光泽度。
根据本发明的实施例，所述前处理的方法可采用以下步骤进行：
(1)在50-70℃下，将金属底材在碱蚀液中进行碱蚀1-2min，然后用去离子水清洗2次；
(2)在10-35℃下，在出光液中出光3-5min，然后用去离子水清洗2次；
(3)在10-35℃下，在化抛液中抛光10-30s，然后用去离子水清洗2次。
在本发明的一些实施例中，上述碱蚀液的浓度为15-20g/L的氢氧化钠水溶液；上述出光液的浓度为200-300ml/L的硝酸水溶液；所述化抛液为含有磷酸和硫酸的溶液，其中磷酸的含量可以为650-750ml/L，硫酸的含量可以为350-250ml/L。
根据本发明的实施例，通过上述步骤1)的方法在金属底材的表面形成装饰层后，再在位于所述金属底材表面的装饰层上形成UV油墨层。
根据本发明的实施例，在位于所述金属底材表面的装饰层上形成UV油墨层的方法可以采用本领域常用的各种方法和条件，例如可以在位于所述金属底材表面的装饰层上喷涂UV油墨，然后在70-90℃下烘烤20-30分钟后，进行紫外曝光。
根据本发明的实施例，上述UV油墨可以使用本领域常用的各种UV油墨，例如可以为5680系UV油墨。
根据本发明的实施例，通过上述方法形成的油墨层的厚度可以为30-50μm，在本发明的一些实施例中，油墨层的厚度为35-45μm。
根据本发明的实施例，在形成所述UV油墨层后，在所述金属底材内表面的UV油墨层上形成至少一条开口，所述开口贯穿所述UV油墨层和装饰层，也就是在位于所述金属底材内表面侧的装饰层和UV油墨层上形成至少一条(或者一条以上的)开口，所述开口贯穿位于所述金属底材内表面侧的装饰层和UV油墨层并露出所述金属底材内表面金属。
根据本发明的实施例，在位于所述金属底材内表面侧的装饰层和UV油墨层上形成一条以上的开口的方法没有特别的限定，可以采用本领域常用的各种方法，例如可以通过镭雕、曝光显影的方法来形成。所述镭雕、曝光显影的条件只要能够在位于所述金属底材内表面侧的装饰层和UV油墨层上形成一条以上的开口并露出所述金属底材内表面金属即可，可以采用本领域的常规条件。
根据本发明的实施例，在位于所述金属底材内表面侧的装饰层和UV油墨层上形成的开口的宽度可以为30-150μm，在本发明的一些实施例中，所述开口的宽度为30-100μm。在本发明的一些实施例中，所述开口的宽度为30-60μm。
根据本发明的实施例，在位于所述金属底材内表面侧的装饰层和UV油墨层上形成的开口的长度为10-60mm，在本发明的一些实施例中，所述开口的长度为10-40mm。另外，开口的条数没有特别的限定，例如可以为1-200条，在本发明的一些实施例中，开口的条 数为5-50条。当在位于所述金属底材内表面侧的装饰层和UV油墨层上形成的开口为多条时，相邻两条缝隙之间的间距可以为2-6mm，在本发明的一些实施例中，相邻两条缝隙之间的间距为4-5mm
根据本发明的实施例，所述开口的形状不受特别限制，可以为直线形、曲线形、方波线形或锯齿线形，在本发明的一些实施例中，所述开口的形状为直线形。
根据本发明的实施例，在步骤4)中，对所述开口对应的金属底材进行蚀刻，形成贯穿所述金属底材的狭缝，或者说，在露出所述金属底材内表面金属后，通过对得到的金属底材露出所述金属底材内表面金属的部分进行蚀刻，以在所述金属底材上形成贯穿所述金属底材的狭缝。
根据本发明的实施例，所述蚀刻包括酸性蚀刻液蚀刻和碱性蚀刻液蚀刻两部分。所述酸性蚀刻液蚀刻用于蚀刻掉狭缝对应处的金属层的大体部分，至露出所述位于金属底材外表面的装饰层即可；所述碱性蚀刻液蚀刻用于除去残余的金属。
根据本发明的实施例，所述酸性蚀刻液为含有三氯化铁、盐酸和水的溶液，其中，相对于100g水，三氯化铁可以为550-600g、盐酸可以为30-50g，蚀刻的条件只要能够满足上述目的即可，在本发明的一些实施例中，所述蚀刻的条件包括：温度为10-35℃，时间为5-15分钟。
根据本发明的实施例，所述碱性蚀刻液含有氢氧化钠、碳酸钠和硝酸钠。其中，所述氢氧化钠的含量可以为50-60g/L，碳酸钠含量可以为50-60g/L，硝酸钠含量可以为50-60g/L。蚀刻的条件只要能够满足上述目的即可，在本发明的一些实施例中，所述蚀刻的条件包括：温度为10-35℃，时间为30-80分钟。在本发明的一些实施例中，所述蚀刻的时间为35-75分钟。
根据本发明的实施例，该方法还包括分别在酸性蚀刻液蚀刻和碱性蚀刻液蚀刻之后，进行水洗、剥黑膜后再水洗的步骤。
根据本发明的实施例，所述剥黑膜的目的在于去除狭缝内的脏污，其方法和条件为：在温度为10-35℃下，在20-30％体积分数的硝酸溶液中，泡1-2min。
根据本发明的实施例，通过在上述条件下进行蚀刻，能够在金属底材上得到上文中所描述范围的狭缝。
根据本发明的实施例，在上述蚀刻完成后，进行除去所述金属底材表面的UV油墨层的步骤。
根据本发明的实施例，除去所述金属底材表面的UV油墨层的方法可以采用本领域常用的各种方法进行，例如可以采用脱漆剂浸泡的方法来除去所述金属底材表面的UV油墨 层。所述脱漆剂例如可以为购于东莞市四辉表面处理科技有限公司的SH-665型号的脱漆剂。所述浸泡的时间通常为10-20min。
在本发明的一些实施例中，在采用所述脱漆剂除去所述金属底材表面的UV油墨层后，可以包括对得到的金属底材进行水洗和干燥的步骤。
根据本发明的实施例，在除去所述金属底材表面的UV油墨层后，进行在所述金属底材的狭缝中填充UV胶水并固化的步骤。
根据本发明的实施例，所述UV胶水可以为本领域常用的各种UV胶水，所述UV胶水例如可以为购于乐泰公司的3211型号的UV胶水。另外，所述UV胶水的固化方法可以采用本领域常规方法进行，例如可以为紫外线曝光。
以下将通过实施例对本发明进行详细描述。但本发明并不仅限于下述实施例。
实施例1
1)形成装饰层
将铝合金(购于东莞市港祥金属材料有限公司公司，牌号为6063，厚度为0.4mm)切割为15mm×80mm的尺寸作为金属底材。
在50℃下，将金属底材在碱蚀液(60g/L氢氧化钠水溶液)中进行碱蚀2min后，用去离子水清洗2次；然后，在25℃下，在出光液(25ml/L硝酸水溶液)中出光4min后，用去离子水清洗2次；然后，在25℃下，在化抛液(为由650ml/L磷酸和350ml/L硫酸组成的溶液)中抛光20s后，用去离子水清洗2次；之后在80℃烘干20min，得到清洗烘干后的金属底材。
通过电泳在金属底材的表面形成厚度为30μm装饰层，所述电泳的条件为：温度为30℃，电压为150V，时间为2min，pH为7.8；电泳液为日本清水株式会社的哑光漆(WNO-1)：日本清水株式会社的亮光漆(NNO-4)＝7：3(重量比，电泳液的固含量为13重量％)。
2)形成UV油墨层
在位于所述金属底材表面侧的装饰层上喷涂5680系UV油墨(购于深圳万佳原精化科技股份有限公司)，在80℃下烘烤25分钟后，进行紫外曝光(曝光条件为时间2min，紫外光强度为800mJ/cm2)，由此形成厚度为40μm的UV油墨层。
3)形成开口
通过镭雕打开口图案，只打掉金属底材内表面对应位置的UV油墨和该面对应位置的电泳层(即装饰层)。其中，开口为6条，形状为直线形，所述开口宽度为30μm，开口长度为19mm，相邻开口间距为4mm。
4)蚀刻
将步骤3)得到的金属底材进行酸性蚀刻液蚀刻后，再进行水洗、剥黑膜和水洗。其中，所述酸性蚀刻液为550g三氯化铁、30g盐酸和100g水的混合溶液，所述酸性蚀刻液蚀刻的条件包括：温度为30℃，时间为10分钟；剥黑膜的方法和条件为在25％体积分数的硝酸水溶液中泡1min。
然后，继续对得到的金属底材进行碱性蚀刻液蚀刻后，再进行水洗、剥黑膜和水洗。其中，所述碱性蚀刻液为含有氢氧化钠、碳酸钠和硝酸钠的混合水溶液(氢氧化钠、碳酸钠和硝酸钠的含量均为50g/L)，所述碱性蚀刻液蚀刻的条件包括：温度为30℃，时间为39分钟；剥黑膜的方法和条件为在25％体积分数的硝酸水溶液中泡1min。
通过上述蚀刻后得到的金属底材上形成有狭缝，该狭缝在金属底材的外表面上的宽度为0.2mm，长度为20mm，相邻两条狭缝的间距为4mm。
5)采用脱漆剂(脱漆剂为东莞市四辉表面处理科技有限公司的SH-665型号的脱漆剂，浸泡时间为15分钟)除去所述金属底材表面的UV油墨层。
6)在所述金属底材的狭缝中填充胶水(购于乐泰公司的3211型号的UV胶水)后在紫外光强度为800mJ/cm2的条件下进行固化，由此得到通讯设备金属外壳。
上述制备得到的通讯设备金属外壳的结构为金属底材上具有狭缝，所述装饰层覆盖所述金属底材的内表面狭缝以外的表面；所述狭缝贯穿所述金属底材和金属底材内表面上的装饰层；所述填充件填充满所述狭缝。该通讯设备金属外壳其狭缝(即天线槽)外观不可见，金属外壳表观整洁光滑平整一致，且金属质感明显。
实施例2
1)形成装饰层
将铝合金(购于东莞市港祥金属材料有限公司公司，牌号为6063，厚度为0.4mm)切割为15mm×80mm的尺寸作为金属底材。
在50℃下，将金属底材在碱蚀液(60g/L氢氧化钠水溶液)中进行碱蚀2min后，用去离子水清洗2次；然后，在25℃下，在出光液(25ml/L硝酸水溶液)中出光4min后，用去离子水清洗2次；然后，在25℃下，在化抛液(为由650ml/L磷酸和350ml/L硫酸组成的溶液)中抛光20s后，用去离子水清洗2次；之后在80℃烘干20min，得到清洗烘干后的金属底材。
通过阳极氧化得到厚度为20μm的装饰层。其中，阳极氧化的条件为：阳极电压为15V，温度为19℃，氧化时间为50min。另外，阳极氧化液为浓度为190g/L的硫酸。
2)形成UV油墨层
在位于所述金属底材表面侧的装饰层上喷涂5680系UV油墨(购于深圳万佳原精化科技股份有限公司)，在80℃下烘烤25分钟后，进行紫外曝光(曝光条件为时间2min，紫外光强度为800mJ/cm2)，由此形成厚度为40μm的UV油墨层。
3)形成开口
通过镭雕打开口图案，只打掉金属底材内表面对应位置的UV油墨和该面对应位置的阳极氧化层(即装饰层)。其中，开口为6条，形状为直线形，所述开口宽度为30μm，开口长度为39mm，相邻开口间距为5mm。
4)蚀刻
将步骤3)得到的金属底材进行酸性蚀刻液蚀刻后，再进行水洗、剥黑膜和水洗。其中，所述酸性蚀刻液为550g三氯化铁、30g盐酸和100g水的混合溶液，所述酸性蚀刻液蚀刻的条件包括：温度为30℃，时间为10分钟；剥黑膜的方法和条件为在25％体积分数的硝酸水溶液中泡1min。
然后，继续对得到的金属底材进行碱性蚀刻液蚀刻后，再进行水洗、剥黑膜和水洗。其中，所述碱性蚀刻液为含有氢氧化钠、碳酸钠和硝酸钠的混合水溶液(氢氧化钠、碳酸钠和硝酸钠的含量均为50g/L)，所述碱性蚀刻液蚀刻的条件包括：温度为30℃，时间为50分钟；剥黑膜的方法和条件为在25％体积分数的硝酸水溶液中泡1min。
通过上述蚀刻后得到的金属底材上形成有狭缝，该狭缝在金属底材的外表面上的宽度为0.35mm，长度为40mm，相邻两条狭缝的间距为5mm。
5)采用中性脱漆剂(脱漆剂为东莞市四辉表面处理科技有限公司的SH-665型号的脱漆剂，浸泡时间为15分钟)除去所述金属底材表面的UV油墨层。
6)在所述金属底材的狭缝中填充胶水(购于乐泰公司的3211型号的UV胶水)后在紫外线强度为800mJ/cm2的条件下进行固化，由此得到通讯设备金属外壳。
上述制备得到的通讯设备金属外壳的结构为金属底材上具有狭缝，所述装饰层覆盖所述金属底材的内表面狭缝以外的表面；所述狭缝贯穿所述金属底材和金属底材内表面上的装饰层；所述填充件填充满所述狭缝。该通讯设备金属外壳其狭缝(即天线槽)外观不可见，金属外壳表观整洁光滑平整一致，且金属质感明显。
实施例3
1)形成装饰层
将铝合金(购于东莞市港祥金属材料有限公司公司，牌号为6063，厚度为0.4mm)切 割为15mm×80mm的尺寸作为金属底材。
在50℃下，将金属底材在碱蚀液(60g/L氢氧化钠水溶液)中进行碱蚀2min后，用去离子水清洗2次；然后，在25℃下，在出光液(25ml/L硝酸水溶液)中出光4min后，用去离子水清洗2次；然后，在25℃下，在化抛液(为由650ml/L磷酸和350ml/L硫酸组成的溶液)中抛光20s后，用去离子水清洗2次；之后在80℃烘干20min，得到清洗烘干后的金属底材。
通过瓷质阳极氧化得到厚度为35μm的装饰层。其中，瓷质阳极氧化的条件为电压为100V，氧化时间为50min，氧化温度为40℃。另外，瓷质阳极电解液含有15g/L草酸钛钾、9g/L草酸、8g/L硼酸以及1g/L柠檬酸。
2)形成UV油墨层
在位于所述金属底材表面侧的装饰层上喷涂5680系UV油墨(购于深圳万佳原精化科技股份有限公司)，在80℃下烘烤25分钟后，进行紫外曝光(曝光条件为时间2min，紫外光强度为800mJ/cm2)，由此形成厚度为40μm的UV油墨层。
3)形成开口
通过镭雕打开口图案，只打掉金属底材内表面对应位置的UV油墨和该面对应位置的瓷质阳极氧化层(即装饰层)。其中，开口为6条，形状为直线形，所述开口宽度为30μm，开口长度为39mm，相邻开口间距为4mm。
4)蚀刻
将步骤3)得到的金属底材进行酸性蚀刻液蚀刻后，再进行水洗、剥黑膜和水洗。其中，所述酸性蚀刻液为550g三氯化铁、30g盐酸和100g水的混合溶液，所述酸性蚀刻液蚀刻的条件包括：温度为30℃，时间为10分钟；剥黑膜的方法和条件为在25％体积分数的硝酸水溶液中泡1min。
然后，继续对得到的金属底材进行碱性蚀刻液蚀刻后，再进行水洗、剥黑膜和水洗。其中，所述碱性蚀刻液为含有氢氧化钠、碳酸钠和硝酸钠的混合水溶液(氢氧化钠、碳酸钠和硝酸钠的含量均为50g/L)，所述碱性蚀刻液蚀刻的条件包括：温度为30℃，时间为61分钟；剥黑膜的方法和条件为在25％体积分数的硝酸水溶液中泡1min。
通过上述蚀刻后得到的金属底材上形成有狭缝，该狭缝在金属底材的外表面上的宽度为0.5mm，长度为40mm，相邻两条狭缝的间距为4mm。
5)采用中性脱漆剂(脱漆剂为东莞市四辉表面处理科技有限公司的SH-665型号的脱漆剂，浸泡时间为15分钟)除去所述金属底材表面的UV油墨层。
6)在所述金属底材的狭缝中填充胶水(购于乐泰公司的3211型号的UV胶水)后在 紫外线强度为800mJ/cm2的条件下进行固化，由此得到通讯设备金属外壳。
上述制备得到的通讯设备金属外壳的结构为金属底材上具有狭缝，所述装饰层覆盖所述金属底材的内表面狭缝以外的表面；所述狭缝贯穿所述金属底材和金属底材内表面上的装饰层；所述填充件填充满所述狭缝。该通讯设备金属外壳其狭缝(即天线槽)外观不可见，金属外壳表观整洁光滑平整一致，且金属质感明显。
实施例4
1)形成装饰层
将铝合金(购于东莞市港祥金属材料有限公司公司，牌号为6063，厚度为0.4mm)切割为15mm×80mm的尺寸作为金属底材。
在50℃下，将金属底材在碱蚀液(60g/L氢氧化钠水溶液)中进行碱蚀2min后，用去离子水清洗2次；然后，在25℃下，在出光液(25ml/L硝酸水溶液)中出光4min后，用去离子水清洗2次；然后，在25℃下，在化抛液(为由650ml/L磷酸和350ml/L硫酸组成的溶液)中抛光20s后，用去离子水清洗2次；之后在80℃烘干20min，得到清洗烘干后的金属底材。
通过微弧氧化得到厚度为30μm的装饰层。其中，微弧氧化的条件为：氧化温度为30℃，氧化正向电压为600V，氧化时间为40min。另外，微弧氧化电解液为：含有0.03mol/L硅酸钠和0.05mol/L氢氧化钠的溶液。
2)形成UV油墨层
在位于所述金属底材表面侧的装饰层上喷涂5680系UV油墨(购于深圳万佳原精化科技股份有限公司)，在80℃下烘烤25分钟后，进行紫外曝光(曝光条件为时间2min，紫外光强度为800mJ/cm2)，由此形成厚度为40μm的UV油墨层。
3)形成开口
通过镭雕打开口图案，只打掉金属底材内表面对应位置的UV油墨和该面对应位置的微弧氧化层(即装饰层)。其中，开口为6条，形状为直线形，所述开口宽度为30μm，开口长度为49mm，相邻开口间距为4mm。
4)蚀刻
将步骤3)得到的金属底材进行酸性蚀刻液蚀刻后，再进行水洗、剥黑膜和水洗。其中，所述酸性蚀刻液为550g三氯化铁、30g盐酸和100g水的混合溶液，所述酸性蚀刻液蚀刻的条件包括：温度为30℃，时间为10分钟；剥黑膜的方法和条件为在25％体积分数的硝酸水溶液中泡1min。
然后，继续对得到的金属底材进行碱性蚀刻液蚀刻后，再进行水洗、剥黑膜和水洗。其中，所述碱性蚀刻液为含有氢氧化钠、碳酸钠和硝酸钠的混合水溶液(氢氧化钠、碳酸钠和硝酸钠的含量均为50g/L)，所述碱性蚀刻液蚀刻的条件包括：温度为30℃，时间为72分钟；剥黑膜的方法和条件为在25％体积分数的硝酸水溶液中泡1min。
通过上述蚀刻后得到的金属底材上形成有狭缝，该狭缝在金属底材料的外表面上的宽度为0.65mm，长度为50mm，相邻两条狭缝的间距为4mm。
5)采用中性脱漆剂(脱漆剂为东莞市四辉表面处理科技有限公司的SH-665型号的脱漆剂，浸泡时间为15分钟)除去所述金属底材表面的UV油墨层。
6)在所述金属底材的狭缝中填充胶水(购于乐泰公司的3211型号的UV胶水)后在紫外线强度为800mJ/cm2的条件下进行固化，由此得到通讯设备金属外壳。
上述制备得到的通讯设备金属外壳的结构为金属底材上具有狭缝，所述装饰层覆盖所述金属底材的内表面狭缝以外的表面；所述狭缝贯穿所述金属底材和金属底材内表面上的装饰层；所述填充件填充满所述狭缝。该通讯设备金属外壳其狭缝(即天线槽)外观不可见，金属外壳表观整洁光滑平整一致，且金属质感明显。
通过上述实施例可知，通过本发明的方法得到的通讯设备金属外壳其狭缝(即天线槽)外观不可见，金属外壳表观整洁光滑平整一致，且金属质感明显。并且，通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的一种或多种在金属底材的表面形成装饰层，在狭缝内填有填充件，能够显著提高其硬度、耐磨、抗震及耐蚀性能。
以上详细描述了本发明的一些实施方式，但是，本发明并不限于上述实施方式中的具体细节，在本发明的技术构思范围内，可以对本发明的技术方案进行多种简单变型，这些简单变型均属于本发明的保护范围。
另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合，为了避免不必要的重复，本发明对各种可能的组合方式不再另行说明。
此外，本发明的各种不同的实施方式之间也可以进行任意组合，只要其不违背本发明的思想，其同样应当视为本发明所公开的内容。

Claims (18)

  1. 一种通讯设备金属外壳，其特征在于，包括：
    金属底材；
    装饰层，所述装饰层覆盖所述金属底材的表面；
    至少一条狭缝，所述狭缝贯穿所述金属底材和所述金属底材内表面上的装饰层；
    填充件，所述填充件填充满所述狭缝，
    其中，所述装饰层是通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的至少一种形成的。
  2. 根据权利要求1所述的通讯设备金属外壳，其特征在于，所述装饰层的厚度为15-35μm。
  3. 根据权利要求1或2所述的通讯设备金属外壳，其特征在于，所述金属底材为铝合金、不锈钢、镁合金或钛合金。
  4. 根据权利要求1-3中任一项所述的通讯设备金属外壳，其特征在于，所述金属底材的厚度为0.2-0.6mm。
  5. 根据权利要求1-4中任一项所述的通讯设备金属外壳，其特征在于，所述狭缝的宽度为0.2-1mm。
  6. 根据权利要求1-5中任一项所述的通讯设备金属外壳，其特征在于，所述狭缝长度为10-60mm。
  7. 根据权利要求1-6中任一项所述的通讯设备金属外壳，其特征在于，当所述狭缝为多条时，相邻两条所述狭缝之间的间距为2-6mm。
  8. 根据权利要求1-7中任一项所述的通讯设备金属外壳，其特征在于，所述填充件是通过UV胶水固化形成的。
  9. 根据权利要求1-8中任一项所述的通讯设备金属外壳，其特征在于，所述通讯设备 金属外壳为手机金属外壳。
  10. 一种通讯设备金属外壳的制备方法，其特征在于，包括：
    1)通过电泳、普通阳极氧化、瓷质阳极氧化、微弧氧化和喷涂中的至少一种在金属底材表面形成装饰层；
    2)在所述装饰层上形成UV油墨层；
    3)在所述金属底材内表面的UV油墨层上形成至少一条开口，所述开口贯穿所述金属底材内表面的UV油墨层和装饰层；
    4)对所述开口对应的金属底材进行蚀刻，形成贯穿所述金属底材的狭缝；
    5)除去所述UV油墨层；
    6)在所述狭缝中填充UV胶水并使其固化。
  11. 根据权利要求10所述的方法，其特征在于，步骤1)中，所述装饰层的厚度为15-35μm。
  12. 根据权利要求10或11所述的方法，其特征在于，步骤2)中，所述UV油墨层的厚度为30-50μm。
  13. 根据权利要求10-12中任一项所述的方法，其特征在于，步骤3)中，所述开口的宽度为30-60μm。
  14. 根据权利要求10-13中任一项所述的方法，其特征在于，步骤3)中，所述开口的长度为10-60mm。
  15. 根据权利要求10-14中任一项所述的方法，其特征在于，当所述开口为多条时，相邻两条所述开口之间的间距为2-6mm。
  16. 根据权利要求10-15中任一项所述的方法，其特征在于，所述金属底材为铝合金、不锈钢、镁合金或钛合金。
  17. 根据权利要求10-16中任一项所述的方法，其特征在于，所述金属底材的厚度为0.2-0.6mm。
  18. 根据权利要求10-17中任一项所述的方法，其特征在于，所述通讯设备金属外壳为手机金属外壳。
PCT/CN2015/098306 2015-07-27 2015-12-22 通讯设备金属外壳及其制备方法 WO2017016154A1 (zh)

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