CN105530787A - Communication equipment metal shell and preparation method thereof - Google Patents
Communication equipment metal shell and preparation method thereof Download PDFInfo
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- CN105530787A CN105530787A CN201410834727.XA CN201410834727A CN105530787A CN 105530787 A CN105530787 A CN 105530787A CN 201410834727 A CN201410834727 A CN 201410834727A CN 105530787 A CN105530787 A CN 105530787A
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Abstract
The invention discloses a communication equipment metal shell and a preparation method thereof. The communication equipment metal shell disclosed by the invention comprises a metal substrate, more than one slit and a plastic support layer, wherein the more than one slit runs through the metal substrate; and the plastic support layer covers at least one part of the inner surface of the metal substrate and fully fills the slits. The communication equipment metal shell which is suitable for various antennas and has an integrated effect in appearance can be provided.
Description
Technical field
The present invention relates to a kind of communication apparatus metal shell and preparation method thereof.
Background technology
For various portable electronic address equipment such as mobile phone, notebook computer, panel computers, metal shell ratio plastic shell is adopted to have more beautiful outward appearance and better texture, there is better anti-wear performance and compressive property simultaneously, therefore, metal is adopted to become a kind of trend from now on as the shell of electronics.But existing limitation of the technology the development of this trend, because metal has electromagnetic shielding action, so a lot of manufacturer still selects plastic shell as electronics shell, the technology that also some manufacturer adopts plastic strip to cut off metal avoids shield electromagnetic signals.
Although the technology adopting plastic strip to cut off metal can avoid shield electromagnetic signals, be divided into several pieces from the whole shell of outer light, there is no outward appearance integration effect.
Summary of the invention
The object of the invention is to overcome the problems referred to above, a kind of communication apparatus metal shell and preparation method thereof with outward appearance integration effect being applicable to various antenna is provided.
To achieve these goals, the invention provides a kind of communication apparatus metal shell, this communication apparatus metal shell comprises metal substrate, runs through the slit of one or more of described metal substrate and plastic support layer, wherein, described plastic support layer covers described metal substrate inner surface at least partially, and fills full described slit.
Present invention also offers a kind of preparation method of communication apparatus metal shell, wherein, the method comprises the following steps,
1) provide metal substrate, described metal substrate offers the slit of one or more;
2) the region stickup reinforcement of slit is offered at described metal substrate outer surface;
3) injection moulding is carried out at least partially to described metal substrate inner surface;
4) reinforcement is removed from described metal substrate.
The present invention also provides a kind of communication apparatus metal shell obtained by said method.
According to technical scheme of the present invention, on metal substrate, first process the slit of one or more, thus can in the slit course of processing hot drainage, prevent metallic residue from remaining in slit, affect electromagnetic passing through; Then offer the region stickup reinforcement of slit at metal substrate outer surface, can prevent slit in next step injection moulding process from deforming thus; In addition, by carrying out injection moulding to described metal substrate inner surface, the effect of filling slit and providing support for slit is played in injection moulding, can prevent slit in surface decoration tech from deforming, thus can after surface decoration tech, the smooth consistency on metal casing appearance can be ensured, form the effect of outward appearance integration.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation not comprising the communication apparatus metal shell of decorative layer prepared by the embodiment of the present invention 1;
Fig. 2 is the structural representation comprising the communication apparatus metal shell of decorative layer prepared by the embodiment of the present invention 1.
Description of reference numerals
1 slit
2 decorative layers
3 metal substrates
4 plastic support layers
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, described communication apparatus can be such as: mobile phone, panel computer, notebook computer or bluetooth earphone etc.
In the present invention, when the inner surface of described metal shell is defined as and uses it in communication apparatus, metal shell is towards the surface of communication apparatus inside.Be understandable that, when the outer surface of metal shell is defined as and uses it in communication apparatus, metal shell is towards the surface in the external world.In addition, the surfaces externally and internally for the preparation of the metal substrate of metal shell is also applicable to above-mentioned definition.
In the present invention, the material of described metal substrate can be generally used for the various metals of communication apparatus for this area, such as, can be aluminium alloy, stainless steel, magnesium alloy or titanium alloy etc.
Communication apparatus metal shell provided by the invention comprises described communication apparatus metal shell and comprises metal substrate, runs through the slit of one or more of described metal substrate and plastic support layer, wherein, described plastic support layer covers described metal substrate inner surface at least partially, and fills full described slit.
In the present invention, described slit, for ensureing antenna and extraneous Signal transmissions, realizes communication.For above-mentioned slit, slit width can be 5-100 μm, is preferably 15-60 μm, is more preferably 25-50 μm.
Preferably, slit length is 2-300mm, is more preferably 50-150mm; Spacing between adjacent two gaps can be 0.1-30mm, is preferably 0.5-15mm.In addition, there is no particular limitation for the number of slit, as long as can realize communication, such as, can be 1-20 bar, is preferably 5-15 bar.
The shape of described slit can be linear, shaped form, square wave is linear or sawtooth is linear, is preferably linear.
For the concrete width in above-mentioned gap, spacing, length, number and shape, the condition such as communication signal classification and frequency that those skilled in the art realize by actual needs adjusts in above-mentioned scope, concrete method of adjustment is well known in the art, repeats no more in the present invention.
In the present invention, the thickness of described plastic support layer can the general thickness of this area, and the thickness (for not comprising the thickness of the plastic layer extend in slit) of such as described plastic support layer can be 0.1-2mm, is preferably 0.4-1.1mm.
According to the present invention, there is no particular limitation for the thickness of described metal substrate, and those skilled in the art suitably can select according to concrete communication apparatus.The thickness of such as described metal substrate is 0.1-0.8mm, is preferably 0.3-0.6mm.
According to the present invention, preferred described plastic support layer covers the whole inner surface of described metal substrate.
According to the present invention, the material forming described plastic support layer is preferably resin, optional one or more in polyethylene, polypropylene, polyacetals, polystyrene, Noryl, PETG, polybutylene terephthalate (PBT), poly-naphthalenedicarboxylic acid ethylene glycol, polyphenylene sulfide, polyimides, polyamidoimide, Polyetherimide, polysulfones, polyether sulfone, polyether-ketone, polyethers ether magnesium, Merlon, polyamide and acrylonitrile-butadiene-styrene copolymer of described resin.
In order to improve the mechanical strength of the metal shell obtained further, the material more preferably forming described plastic support layer is the mixture of resin and glass fibre.Further preferably, in said mixture, described resin is selected from the one in PETG, polyphenylene sulfide, Merlon, polyamide; With the weight of described mixture for benchmark, the content of described glass fibre is 1-50 % by weight, is more preferably 20-40 % by weight.
In addition, as the formation method of described plastic support layer, formed preferably by the mixture of the above-mentioned resin of injection moulding or resin and glass fibre on the inner surface of described metal substrate.
According to the present invention, described communication apparatus metal shell also comprises the decorative layer being positioned at metal substrate outer surface.
As decorative layers that above-mentioned decorative layer can be by one or more formation in electrophoresis, differential arc oxidation, anodic oxidation, hard anode and spraying.
According to the present invention, to the thickness of described decorative layer, there is no particular limitation, can be the general thickness of this area.The thickness of such as described decorative layer can be 5-50 μm.
The invention provides a kind of preparation method of communication apparatus metal shell, wherein, the method comprises the following steps,
1) provide metal substrate, described metal substrate offers the slit of one or more;
2) the region stickup reinforcement of slit is offered at described metal substrate outer surface;
3) injection moulding is carried out at least partially to described metal substrate inner surface;
4) reinforcement is removed from described metal substrate.
In the present invention, described metal substrate outer surface offers the region of slit, refers to the region corresponding with the antenna of communication apparatus on metal substrate.
In the present invention, there is no particular limitation for the thickness of described metal substrate, and those skilled in the art suitably can select according to concrete communication apparatus.The thickness of such as described metal substrate can be 0.1-0.8mm, is preferably 0.3-0.6mm.
According to the present invention, need the slit offering one or more on the metal substrate of described metal shell to ensure antenna and extraneous Signal transmissions, realize communication.For above-mentioned slit, slit width can be 5-500 μm, is preferably 15-60 μm, is more preferably 25-50 μm.
Preferably, slit length is 2-300mm, is more preferably 50-150mm; Spacing between adjacent two gaps can be 0.1-30mm, is preferably 0.5-15mm.In addition, there is no particular limitation for the number of slit, as long as can realize communication, such as, can be 1-20 bar, is preferably 5-15 bar.
The shape of described slit can be linear, shaped form, square wave is linear or sawtooth is linear, is preferably linear.
For the concrete width in above-mentioned gap, spacing, length, number and shape, the condition such as communication signal classification and frequency that those skilled in the art realize by actual needs adjusts in above-mentioned scope, concrete method of adjustment is well known in the art, repeats no more in the present invention.
In the present invention, by cutting on described metal substrate, described slit can be formed; There is no particular limitation for described cutting method, as long as the described slit formed meets above-mentioned requirements, can use the method for this area routine.Described cutting method is selected from the one in laser cutting, electron beam cutting, Water Cutting and Linear cut.
When adopting above-mentioned various method to cut, its concrete operations and condition are conventional in prior art, such as, described laser cutting condition is: power is 50-200W, cutting speed is 10-5000mm/s, and laser frequency is 10-200kHz, and output wavelength is 250-1064nm.The slit width formed by the method for above-mentioned laser cutting is usually at 20-80 μm.
Described electron beam cutting method is: be 10 in vacuum degree
-3-10
-4in the environment of Pa, be 5-10mA at electric current, power density is 10
6-10
8w/cm
2condition under cut.The slit width that the method for being cut by above-mentioned electron beam is formed is usually at 30-150 μm.
The condition of described line processing is: feed speed: 2-15mm/min; Peak current: 0.8-1.8A; Machining voltage: 50-110V; Pulse duration: 2-6 μ s; Pulse distance: 6-30 μ s.
In the present invention, described reinforcement is pasted onto by binding agent the region that described metal substrate outer surface offers slit, described binding agent can this area the various binding agents commonly used, can be such as 502 glue.
According to the present invention, described reinforcement is used for, at the described metal substrate of reinforcement, preventing described slit from deforming in next step injection moulding.Can be such as working of plastics or metalwork as such reinforcement.
In the present invention, to the thickness of described reinforcement, there is no particular limitation, as long as can strengthen described metal substrate, preventing described slit from deforming in next step injection moulding, such as, can be 0.5-2mm, is preferably 0.8-1.5mm.
In the present invention, when pasting reinforcement, the side first will pasted at reinforcement fills glue, is then pasted onto above slit by reinforcement, two edge lengths exceed single group more than slit width 1mm (being preferably 1-5mm), to play the object of fixing whole group of slit.There is no particular limitation, as long as can fix whole group of slit in the position of stickup reinforcement.Such as at least on the position of the left, center, right of single group slit, reinforcement can be pasted with reinforcement with slits intersect or vertical mode.The not special requirement of number for reinforcement, is generally more than 3, is preferably 3-8 bar.In addition, preferably on the length direction of slit, paste reinforcement equably, also, the spacing be pasted between the reinforcement on slit is equal.
According to the present invention, described reinforcement is preferably the larger metal of hardness and plastics.When described reinforcement is metal, it prepares material can be stainless steel, titanium alloy or liquid metal etc.When described reinforcement is plastics, it prepares material can be selected from polyethylene, polypropylene, polyacetals, polystyrene, Noryl, phenolic resins, PETG, polybutylene terephthalate (PBT), poly-naphthalenedicarboxylic acid ethylene glycol, polyphenylene sulfide, polyimides, polyamidoimide, Polyetherimide, polysulfones, polyether sulfone, polyether-ketone, polyethers ether magnesium, Merlon, polyamide, epoxy resin and acrylonitrile-butadiene-styrene copolymer one or more.Be preferably in polyamide, phenolic resins and epoxy resin in them one or more.
According to the present invention, after described metal substrate outer surface offers the region stickup reinforcement of slit, injection moulding (preferably carrying out injection moulding to the whole inner surface of metal substrate) is carried out at least partially to described metal substrate inner surface, forms plastic layer at the inner surface of described metal substrate.In order to improve the compactness of plastic layer that injection moulding obtains and metal substrate, improving the intensity of the metal shell obtained, preferably before described injection moulding, roughening treatment being carried out to the inner surface of described metal substrate.
According to the present invention, described coarsing processing method is preferably: at 10-35 DEG C, the hydrochloric acid solution being 2-20 % by weight by metal substrate inner surface and concentration contacts 1-5min, is then taken out by metal substrate, puts into water and soak 1-5min; Repeat aforesaid operations 2-10 time.
By above-mentioned roughening treatment, multiple micro-hole can be formed at described metal substrate inner surface, thus the compactness of plastic layer that injection moulding obtains and metal substrate can be improved.
According to the present invention, the condition of described injection moulding can be the condition that this area routine uses, and in preferred situation, the condition of described injection moulding comprises: penetrate pressure 1800-2200bar, pressurize 1000-1200bar, upper and lower mould temperature 90-140 DEG C, injection time 0.8-1.5s.
The resin that the material adopted during described injection moulding can use for this area routine, such as optional one or more in polyethylene, polypropylene, polyacetals, polystyrene, Noryl, PETG, polybutylene terephthalate (PBT), poly-naphthalenedicarboxylic acid ethylene glycol, polyphenylene sulfide, polyimides, polyamidoimide, Polyetherimide, polysulfones, polyether sulfone, polyether-ketone, polyethers ether magnesium, Merlon, polyamide and acrylonitrile-butadiene-styrene copolymer.
In order to improve the mechanical strength of the metal shell obtained further, under preferable case, the material adopted during described injection moulding is the mixture of resin and glass fibre.More preferably, in situation, in said mixture, described resin is selected from the one in PETG, polyphenylene sulfide, Merlon, polyamide; With the weight of described mixture for benchmark, the content of described glass fibre is 1-50 % by weight, is more preferably 20-40 % by weight.
According to the present invention, obtained the plastic support layer be combined with metal substrate by above-mentioned injection moulding, and described plastic support layer fills full described slit.
For the thickness (for not comprising the thickness of the plastic layer extend in slit) of described plastic support layer, those skilled in the art can suitably select according to the needs of the design thickness of product, can be such as 0.1-2mm, be preferably 0.4-1.1mm.
In the present invention, by above-mentioned plastic support layer to the support of metal substrate, can prevent slit in surface decoration tech from deforming.
According to the present invention, need to remove described reinforcement from described metal substrate.In the present invention, remove described reinforcement from described metal substrate and also comprise the binding agent removed the described reinforcement of bonding and use.
According to the present invention, in order to improve the aesthetic measure of metal shell, preferably also form decorative layer at the outer surface of metal substrate.Described decorative layer can adopt the conventional method of this area and condition to carry out, such as, can form described decorative layer by one or more in electrophoresis, differential arc oxidation, anodic oxidation, hard anode and spraying.
Thickness for above-mentioned decorative layer can change in a big way, and under preferable case, the thickness of described decorative layer is 5-80 μm.Decorative layer can be existing various electronic product casing decorative layer, such as, can be the one in alumina layer, epoxy coating, acrylic resin coating.
In the present invention, anode oxidation method can be adopted to form described decorative layer, described anodic oxidation condition can condition known in the field, such as, can be: with concentration be the sulfuric acid of 150-210g/L as tank liquor, voltage is 10-15V, and current density is 1-2A/dm
2, temperature is 10-22 DEG C, and anodizing time is 20-60min, liquor of hole-sealing tank (NiSO
4the aqueous solution) concentration is 1-10g/L, sealing of hole temperature is 50-95 DEG C, and the sealing of hole time is 10-50min.The decorative layer thickness formed by above-mentioned anode oxidation method is generally 10-30 μm.
Such as, or also form described decorative layer by differential arc oxidation method, described differential arc oxidation condition can condition known in the field, and can be: pH is 6-12, voltage be 0-800V, and current density is 1-10A/dm
2, temperature is 15-60 DEG C, and the time is 10-60min, and liquor of hole-sealing tank is water, and sealing of hole temperature is 70-90 DEG C, and the sealing of hole time is 1-10min.The decorative layer thickness formed by above-mentioned differential arc oxidation method is generally 10-50 μm.
Such as, or form described decorative layer by electrophoresis, described deposition condition can condition known in the field, can be: ability cathode electrophoresis: voltage is 20-60V, pH is 4-6, and temperature is 15-30 DEG C, and the time is 20-60s; Anodic electrophoresis: voltage is 40-100V, pH is 6-8, and temperature is 15-30 DEG C, and the time is 40-90s; Baking temperature is 120-200 DEG C, and baking time is 30-60min.The decorative layer thickness formed by above-mentioned electrophoresis method is generally 5-35 μm.
Such as, or form described decorative layer by spraying, described spraying conditions can condition known in the field, can be: electrostatic high-pressure: 60-90kV; Electrostatic induced current: 10-20 μ A; Velocity pressure: 0.3-0.55Mpa; Atomizing pressure: 0.33-0.45Mpa; Transporting velocity: 4.5-5.5m/min; Curing temperature: 150-220 DEG C; Curing time: 30-180min.
The present invention also provides a kind of communication apparatus metal shell obtained by said method.
Below will be described the present invention by embodiment.
Embodiment 1
1) slit is formed
Aluminium alloy (be purchased from Dongguan City port ancient sacrificial bronze ware and belong to Materials Co., Ltd, the trade mark is 6061, and thickness is 0.4mm) is cut into the size of 15mmx80mm as metal substrate.Laser machine (model that wide laser Science and Technology Co., Ltd. produces is FM20D laser machine) is adopted to carry out slit processing (wherein on metal substrate, slit is 9, shape is linear), described slit width is 20 μm, slit length is 30mm, and adjacent slots spacing is 1mm.Laser processing power is 50W, and speed is 50mm/s, and frequency is 20kHz, and wavelength is 1064nm, obtains the metal substrate A11 offering slit.
2) injection moulding
Reinforcement (stainless steel substrates is pasted in the region offering slit at metal substrate A11 outer surface, thickness is 1mm, length is 15mm, width is 3mm, its paste position is the position, three, left, center, right in slit length direction, and the length direction of reinforcement is vertical with the length direction of slit).Then the metal substrate being pasted with reinforcement is carried out oil removing, washing, alkaline etching, washing, pickling, washing process, immerse afterwards in pretreatment fluid (carbamate aqueous solution) and carry out 5min preliminary treatment, 80 DEG C are dried 20min, complete injection moulding preprocessing process.
Then in beaker, prepare the hydrochloric acid solution 500ml of 10 % by weight, put into 25 DEG C of thermostats and be warming up to 25 DEG C, the metal substrate being pasted with reinforcement is immersed, taken out after 2min, put into the beaker that water is housed and soak 1min, adding a bubble with a hypo acid bubble is a circulation, circulation like this 4 times, after last water soaking, product is put into 80 DEG C of baking ovens and dry, obtain the metal substrate A12 after roughening treatment.
Above-mentioned metal substrate A12 is put into mould, (injecting condition is: penetrate pressure 1800bar to adopt the polybutylene terephthalate (PBT) (PBT) containing the glass fibre of 30 % by weight to carry out injection moulding at metal substrate inner surface, pressurize 1000bar, upper and lower mould temperature 90 DEG C, injection time 0.8s), form plastic support layer (thickness is 0.6mm).Then, remove binding agent and reinforcement from metal substrate, thus obtain the communication apparatus metal shell A13 being combined with plastic support layer.
As shown in Figure 1, plastic support layer 4 covers and is fixed on the inner surface of metal substrate 3, and metal substrate 3 has multiple slit 1, slit 1 is filled up by plastic support layer 4.
3) anode oxidation method is adopted to form surface decoration layer
The A13 eliminating binding agent and reinforcement is carried out alkaline etching, washing, pickling, washing process, immerses afterwards and fill the H that concentration is 180g/L
2sO
4in the electrolysis tank of the aqueous solution, using A13 as anode, corrosion resistant plate, as negative electrode, is 15V at voltage, and current density is 1A/dm
2, temperature is the condition anodic oxygen 40min of 19 DEG C, takes out and Ultrasonic Cleaning is clean after completing anodic oxidation, avoids gap built-in acid impact follow-up painted.Now, the complete decorated layer in gap is filled and is covered, and naked eyes are invisible.
Acid dye liquor is immersed (purchased from Ao Yezhi industry Industrial Co., Ltd through anodised A13 by above-mentioned, dyestuff model is TACBLACK-SLH) middle dyeing 10min, this acid dye liquor concentration is 5g/L, and pH value is 5.5, the temperature of described dye liquor is 50 DEG C, and taking-up after completing also cleans up.
Then at hole sealing agent (NiSO
4the aqueous solution, concentration is 10g/L) middle dipping 20min, temperature is 95 DEG C, cleans up, and toast 15min after completing sealing of hole with the pure water of 90 DEG C under 60 DEG C of conditions.Obtain the decorative layer that thickness is 20 μm.Finally obtain the communication apparatus metal shell A14 with surfacing decorative layer.
The structure of the above-mentioned communication apparatus metal shell prepared as shown in Figure 2.Plastic support layer 4 covers and is fixed on the inner surface of metal substrate 3, and metal substrate 3 has multiple slit 1, slit 1 is filled up by plastic support layer 4; Metal substrate 3 outer surface is attached with decorative layer 2, and decorative layer 2 does not have groove and uneven, surfacing.
Embodiment 2
1) slit is formed
Aluminium alloy (be purchased from Dongguan City port ancient sacrificial bronze ware and belong to Materials Co., Ltd, the trade mark is 6061, and thickness is 0.6mm) is cut into the size of 15mmx80mm as metal substrate.Laser machine (model that wide laser Science and Technology Co., Ltd. produces is FM20D laser machine) is adopted to carry out slit processing (wherein on metal substrate, slit is 9, shape is linear), described slit width is 40 μm, slit length is 100mm, and adjacent slots spacing is 2mm.Laser processing power is 200W, and speed is 500mm/s, and frequency is 80kHz, and wavelength is 300nm, obtains the metal substrate A21 offering slit.
2) injection moulding
8 reinforcement (epoxy sheet are pasted in the region offering slit at metal substrate A21 outer surface, thickness is 1.5mm, and length is 30mm, and width is 3mm, paste equally spacedly along slit length direction, and the length direction of reinforcement is vertical with the length direction of slit).Then the metal substrate being pasted with reinforcement is carried out oil removing, washing, alkaline etching, washing, pickling, washing process, immerse afterwards in pretreatment fluid (carbamate aqueous solution) and carry out 5min preliminary treatment, 80 DEG C are dried 20min, complete injection moulding preprocessing process.
Then in beaker, prepare the hydrochloric acid solution 500ml of 2 % by weight, put into 25 DEG C of thermostats and be warming up to 25 DEG C, the metal substrate being pasted with reinforcement is immersed, taken out after 5min, put into the beaker that water is housed and soak 3min, adding a bubble with a hypo acid bubble is a circulation, circulation like this 3 times, after last water soaking, product is put into 80 DEG C of baking ovens and dry, obtain the metal substrate A22 after roughening treatment.
Above-mentioned metal substrate A22 is put into mould, employing has the polybutylene terephthalate (PBT) of the glass fibre of 30 % by weight (PBT) to carry out injection moulding at metal substrate inner surface, and (injecting condition is: penetrate pressure 2200bar, pressurize 1200bar, upper and lower mould temperature 140 DEG C, injection time 1.5s), form plastic support layer (thickness is 1.1mm).Then, remove binding agent and reinforcement from metal substrate, thus obtain the communication apparatus metal shell A23 being combined with plastic support layer, wherein, plastic support layer covers and is fixed on the inner surface of metal substrate, and metal substrate has multiple slit, slit is filled up by plastic support layer.
3) anode oxidation method is adopted to form surface decoration layer
The A23 eliminating binding agent and reinforcement is carried out alkaline etching, washing, pickling, washing process, immerses afterwards and fill the H that concentration is 180g/L
2sO
4in the electrolysis tank of the aqueous solution, using A23 as anode, corrosion resistant plate, as negative electrode, is 15V at voltage, and current density is 1A/dm
2, temperature is the condition anodic oxygen 40min of 19 DEG C, takes out and Ultrasonic Cleaning is clean after completing anodic oxidation, avoids gap built-in acid impact follow-up painted.Now, the complete decorated layer in gap is filled and is covered, and naked eyes are invisible.
Acid dye liquor is immersed (purchased from Ao Yezhi industry Industrial Co., Ltd through anodised A23 by above-mentioned, dyestuff model is TACBLACK-SLH) middle dyeing 10min, this acid dye liquor concentration is 5g/L, and pH value is 5.5, the temperature of described dye liquor is 50 DEG C, and taking-up after completing also cleans up.
Then at hole sealing agent (NiSO
4the aqueous solution, concentration is 10g/L) middle dipping 20min, temperature is 95 DEG C, cleans up, and toast 15min after completing sealing of hole with the pure water of 90 DEG C under 60 DEG C of conditions.Obtain the decorative layer that thickness is 20 μm.Finally obtain the communication apparatus metal shell A24 with surfacing decorative layer.Wherein, plastic support layer covers and is fixed on the inner surface of metal substrate, and metal substrate has multiple slit, slit is filled up by plastic support layer; Metal substrate outer surface is attached with decorative layer, and decorative layer does not have groove and uneven, surfacing.
Embodiment 3
1) slit is formed
Aluminium alloy (be purchased from Dongguan City port ancient sacrificial bronze ware and belong to Materials Co., Ltd, the trade mark is 6061, and thickness is 0.5mm) is cut into the size of 15mmx80mm as metal substrate.Laser machine (model that wide laser Science and Technology Co., Ltd. produces is FM20D laser machine) is adopted to carry out slit processing (wherein on metal substrate, slit is 9, shape is linear), described slit width is 30 μm, slit length is 70mm, and adjacent slots spacing is 1.5mm.Laser processing power is 150W, and speed is 100mm/s, and frequency is 50kHz, and wavelength is 355nm, obtains the metal substrate A31 offering slit.
2) injection moulding
5 reinforcement (polyurethane resin sheets are pasted in the region offering slit at metal substrate A31 outer surface, thickness is 1.2mm, and length is 20mm, and width is 3mm, paste equally spacedly along slit length direction, and the length direction of reinforcement is vertical with the length direction of slit).Then the metal substrate being pasted with reinforcement is carried out oil removing, washing, alkaline etching, washing, pickling, washing process, immerse afterwards in pretreatment fluid (carbamate aqueous solution) and carry out 5min preliminary treatment, 80 DEG C are dried 20min, complete injection moulding preprocessing process.
Then in beaker, prepare the hydrochloric acid solution 500ml of 1.5 % by weight, put into 25 DEG C of thermostats and be warming up to 25 DEG C, the metal substrate being pasted with reinforcement is immersed, taken out after 3min, put into the beaker that water is housed and soak 3min, adding a bubble with a hypo acid bubble is a circulation, circulation like this 5 times, after last water soaking, product is put into 80 DEG C of baking ovens and dry, obtain the metal substrate A32 after roughening treatment.
Above-mentioned metal substrate A32 is put into mould, employing has the polybutylene terephthalate (PBT) of the glass fibre of 30 % by weight (PBT) to carry out injection moulding at metal substrate inner surface, and (injecting condition is: penetrate pressure 2000bar, pressurize 1100bar, upper and lower mould temperature 110 DEG C, injection time 1s), form plastic support layer (thickness is 0.8mm).Then, remove binding agent and reinforcement from metal substrate, thus obtain the communication apparatus metal shell A33 being combined with plastic support layer, wherein, plastic support layer covers and is fixed on the inner surface of metal substrate, and metal substrate has multiple slit, slit is filled up by plastic support layer.
3) anode oxidation method is adopted to form surface decoration layer
The A33 eliminating binding agent and reinforcement is carried out alkaline etching, washing, pickling, washing process, immerses afterwards and fill the H that concentration is 180g/L
2sO
4in the electrolysis tank of the aqueous solution, using A33 as anode, corrosion resistant plate, as negative electrode, is 15V at voltage, and current density is 1A/dm
2, temperature is the condition anodic oxygen 40min of 19 DEG C, takes out and Ultrasonic Cleaning is clean after completing anodic oxidation, avoids gap built-in acid impact follow-up painted.Now, the complete decorated layer in gap is filled and is covered, and naked eyes are invisible.
Acid dye liquor is immersed (purchased from Ao Yezhi industry Industrial Co., Ltd through anodised A33 by above-mentioned, dyestuff model is TACBLACK-SLH) middle dyeing 10min, this acid dye liquor concentration is 5g/L, and pH value is 5.5, the temperature of described dye liquor is 50 DEG C, and taking-up after completing also cleans up.
Then at hole sealing agent (NiSO
4the aqueous solution, concentration is 10g/L) middle dipping 20min, temperature is 95 DEG C, cleans up, and toast 15min after completing sealing of hole with the pure water of 90 DEG C under 60 DEG C of conditions.Obtain the decorative layer that thickness is 16 μm.Finally obtain the communication apparatus metal shell A34 with surfacing decorative layer.Wherein, plastic support layer covers and is fixed on the inner surface of metal substrate, and metal substrate has multiple slit, slit is filled up by plastic support layer; Metal substrate outer surface is attached with decorative layer, and decorative layer does not have groove and uneven, surfacing.
Embodiment 4
According to the method for embodiment 1 carry out unlike:
Step 1) in, employing diameter is the copper wire of 0.02 millimeter, feed speed be 12mm/min, under peak current is 1.2A, pulse duration is 4 μ s, the pulse spacing be 16 μ s and machining voltage is the condition of 70V, metal substrate carries out slit processing (wherein, slit is 9, and shape is linear), described slit width is 60 μm, slit length is 30mm, and adjacent slots spacing is 1mm.Obtain the metal substrate A41 offering slit;
Step 3) in, adopt differential arc oxidation method to form incrustation coating.It is specially: A43 is carried out ungrease treatment, immerse in micro-arc oxidation electrolyte (composition with consist of: calgon 40g/L, sodium metasilicate 8g/L, ammonium metavanadate 12g/L) afterwards, using this A43 as anode, corrosion resistant plate is as negative electrode, be 0-600V at voltage, current density is 5A/dm2, and temperature is differential arc oxidation 40min under the condition of 25 DEG C, and after completing, taking-up pure water cleans up.Obtain the A43 after differential arc oxidation.Now, slit is filled by micro-arc oxidation films cover completely, and surface-slit is without feel.
Above-mentioned metal substrate A43 being immersed temperature is close 5min in the hot pure water of 85 DEG C, then takes out and dries up.Obtain the communication apparatus metal shell A44 of the surfacing decorative layer with 35 μm of thickness.Wherein, plastic support layer covers and is fixed on the inner surface of metal substrate, and metal substrate has multiple slit, slit is filled up by plastic support layer; Metal substrate outer surface is attached with decorative layer, and decorative layer does not have groove and uneven, surfacing.
Embodiment 5
According to the method for embodiment 1 carry out unlike:
Step 1) in, metal substrate is put in a vacuum chamber, be evacuated to 10
-3-10
-4pa, under electric current is 8mA condition, is become the spot of diameter 15 μm, makes power density reach 10 by electron beams converge by magnetic lens system
7w/cm
2after, this metal substrate is formed slit (wherein, slit is 9, and shape is linear), and described slit width is 15 μm, and slit length is 70mm, and adjacent slots spacing is 0.6mm.Obtain the metal substrate A51 offering slit.
Step 3) in, adopt electrophoresis method to form surface decoration layer.Its concrete grammar is: A53 is carried out alkaline etching, washing, pickling and washing process, put into electrophoretic paint as negative electrode afterwards (acrylic resin (being purchased from clear water Co., Ltd.) is dissolved in water in colloidal form and obtains, acrylic acid content is 7 % by weight) in, be 4.5 at cathode electrodip painting pH, temperature is 23 DEG C, voltage is under the condition of 35V, electrophoresis 120s, and surface forms electrophoretic coating.Afterwards, above-mentioned matrix is put into clear water and embathes 120s, remove coating surface raffinate.Obtain the metal substrate after electrophoretic painting.Now, gap is covered by electrophoretic coating completely, and surface gaps naked eyes are invisible.Finally, above-mentioned matrix is put into the baking oven that temperature is 175 DEG C, baking 50min, after baking-curing, obtains the communication apparatus metal shell A54 of the electrophoretic coating of the surfacing with 30 μm of thickness.Wherein, plastic support layer covers and is fixed on the inner surface of metal substrate, and metal substrate has multiple slit, slit is filled up by plastic support layer; Metal substrate outer surface is attached with decorative layer, and decorative layer does not have groove and uneven, surfacing.
Embodiment 6
According to the method for embodiment 1 carry out unlike:
Step 3) in, adopt the method for spraying to form decorative layer, the condition of spraying is: electrostatic high-pressure: 70kV; Electrostatic induced current: 15 μ A; Velocity pressure: 0.4Mpa; Atomizing pressure: 0.4Mpa; Transporting velocity: 5m/min; Curing temperature: 180 DEG C; Curing time: 1h.Obtain the communication apparatus metal shell A64 of the coating of the surfacing with 30 μm of thickness.Wherein, plastic support layer covers and is fixed on the inner surface of metal substrate, and metal substrate has multiple slit, slit is filled up by plastic support layer; Metal substrate outer surface is attached with decorative layer, and decorative layer does not have groove and uneven, surfacing.
Known by above-described embodiment, by method of the present invention, on metal substrate, first process the slit of one or more, thus can in the slit course of processing hot drainage, prevent metallic residue from remaining in slit, affect electromagnetic passing through; Then offer the region stickup reinforcement of slit at metal substrate outer surface, can prevent slit in next step injection moulding process from deforming thus; In addition, by carrying out injection moulding to described metal substrate inner surface, the effect of filling slit and providing support for slit is played in injection moulding, can prevent slit in surface decoration tech from deforming, thus can after surface decoration tech, the smooth consistency on metal casing appearance can be ensured, form the effect of outward appearance integration.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned execution mode, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.
In addition, also can carry out combination in any between various different execution mode of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (18)
1. a communication apparatus metal shell, it is characterized in that, described communication apparatus metal shell comprises metal substrate, runs through the slit of one or more of described metal substrate and plastic support layer, wherein, described plastic support layer covers described metal substrate inner surface at least partially, and fills full described slit.
2. communication apparatus metal shell according to claim 1, wherein, described slit width is 5-100 μm.
3. communication apparatus metal shell according to claim 2, wherein, described slit length is 2-300mm, and the spacing between adjacent two slits is 0.1-30mm.
4. according to the communication apparatus metal shell in claim 1-3 described in any one, wherein, described plastic support layer covers the whole inner surface of described metal substrate.
5. according to the communication apparatus metal shell in claim 1-3 described in any one, wherein, described communication apparatus metal shell also comprises the decorative layer being positioned at metal substrate outer surface.
6. a preparation method for communication apparatus metal shell, is characterized in that, the method comprises the following steps,
1) provide metal substrate, described metal substrate offers the slit of one or more;
2) the region stickup reinforcement of slit is offered at described metal substrate outer surface;
3) injection moulding is carried out at least partially to described metal substrate inner surface;
4) reinforcement is removed from described metal substrate.
7. method according to claim 6, wherein, described slit width is 5-100 μm.
8. method according to claim 7, wherein, described slit length is 2-300mm, and the spacing between adjacent two slits is 0.1-30mm.
9. according to the method in claim 6-8 described in any one, wherein, step 1) in, by cutting on described metal substrate, form gap; Described cutting method is selected from the one in laser cutting, electron beam cutting, Water Cutting or Linear cut.
10. method according to claim 6, wherein, described reinforcement is working of plastics or metalwork.
11. methods according to claim 10, wherein, the thickness of described reinforcement is 0.5-2mm.
12. methods according to claim 6, wherein, carry out injection moulding to the whole inner surface of described metal substrate.
13. methods according to claim 6 or 12, wherein, the condition of described injection moulding comprises: penetrate pressure 1600-2400bar, pressurize 800-1400bar, upper and lower mould temperature 80-150 DEG C, penetrate time 0.5-2s.
14. methods according to claim 13, wherein, the method also comprises: before described injection moulding, carries out roughening treatment to described metal substrate inner surface.
15. methods according to claim 14, wherein, the method for described roughening treatment is: at 10-35 DEG C, and the hydrochloric acid solution being 2-20 % by weight by metal substrate inner surface and concentration contacts 1-5min, then metal substrate is taken out, put into water and soak 1-5min; Repeat aforesaid operations 2-10 time.
16. methods according to claim 6, wherein, the outer surface that the method is also included in described metal substrate forms decorative layer.
17. methods according to claim 16, wherein, form described decorative layer by one or more in electrophoresis, differential arc oxidation, anodic oxidation, hard anode and spraying.
18. 1 kinds of communication apparatus metal shells, is characterized in that, are obtained by the method preparation described in any one in claim 6-17.
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Application publication date: 20160427 |