CN104735941B - A kind of communication apparatus metal shell and preparation method thereof - Google Patents
A kind of communication apparatus metal shell and preparation method thereof Download PDFInfo
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- CN104735941B CN104735941B CN201310706436.8A CN201310706436A CN104735941B CN 104735941 B CN104735941 B CN 104735941B CN 201310706436 A CN201310706436 A CN 201310706436A CN 104735941 B CN104735941 B CN 104735941B
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Abstract
For overcome the problems, such as at communication apparatus metal shell in the prior art gap it is easy to damage deformation and be unfavorable for make decorative layer, the present invention provides a kind of communication apparatus metal shells, including metal shell and plastic part；A plurality of gap is offered on the metal shell；The gap width is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm；There are on the metal shell inner surface at position multiple micro- holes where the gap；Where the plastic part is covered in gap on the metal shell inner surface at position, and fill micro- hole.Meanwhile the invention also discloses the preparation methods of above-mentioned communication apparatus metal shell.Communication apparatus metal shell provided by the invention can effectively guarantee equipment normal communication, and will not deform at the housing slot；It is conducive to simultaneously in its surface production decorative layer without leaving a trace at gap.
Description
Technical field
The present invention relates to electronics fields more particularly to a kind of communication apparatus metal shell and preparation method thereof.
Background technique
The portable electronic address equipment similar for mobile phone, tablet computer, laptop etc., with plastic shell phase
There is more beautiful, more texture, while the feature that the performances such as wear-resisting damage resistant are more superior than, metal shell, therefore no matter
It is the angle from manufacturer or user, large area has become development trend from now on using metal shell.But in the prior art
In, since electromagnetic wave cannot penetrate metal, electronics can only use non-metal shell in design, or using gold
It needs to be separated at antenna with non-metallic material when belonging to shell.
In the prior art, to realize under the premise of using metal shell, guarantee the normal communication of communication apparatus, usually adopt
Gap is opened up on the metal shell at the position corresponding to the antenna inside equipment, guarantees that antenna can work normally.
But in these cases, the gap of metal shell easily deforms and damages during being in following process,
When having multiple gaps especially on metal shell, the deformation at the gap of metal shell is even more serious.
Summary of the invention
The technical problem to be solved by the present invention is to for rapid wear at communication apparatus metal shell in the prior art gap
It is bad to deform and be unfavorable for the problem of making decorative layer, a kind of communication apparatus metal shell is provided.
It is as follows that the present invention solves technical solution used by above-mentioned technical problem:
A kind of communication apparatus metal shell, including metal shell and plastic part are provided；It is offered on the metal shell more
Gap；The gap width is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm；Gap place portion
There are multiple micro- holes on the metal shell inner surface of position；The metal shell inner surface at position where the plastic part is covered in gap
On, and fill micro- hole.
In communication apparatus metal shell provided by the invention, on metal shell have gap, can effectively guarantee antenna with
Extraneous signal transmission, realizes communication.Simultaneously as the presence in micro- hole, can be such that plastic part is firmly fixed in metal shell
Surface, the protection to carrying out at gap, effectively prevent the metal shell at gap to deform.
Meanwhile the present invention also provides the preparation methods of above-mentioned communication apparatus metal shell, comprising:
S1, metallic matrix is provided, offers a plurality of gap on the metallic matrix；The gap width is 5-40 μm, phase
Spacing between adjacent two gaps is 0.3-1.6mm；
S2, roughening treatment is carried out to the metallic matrix inner surface at position where gap, forms metal shell；In metal shell
There are multiple micro- holes on surface；
S3, the casting resin on the metal shell inner surface at position where gap form plastic part.
Inventor is by largely test discovery, when preparing above-mentioned communication apparatus metal shell, needs first in metallic matrix
On crack, to guarantee the normal transmission of communication signal.And after cracking on metallic matrix, the metallic matrix at position where gap
Easily deform.It need to be strengthened.
In the present invention, after cracking on metallic matrix, roughening treatment is carried out to metallic matrix inner surface, is formed behind micro- hole again
It is molded.If being roughened and just being cracked after being molded, cutting is carried out when cracking, and cutting through shallowly will lead to gap and can not pass through completely
Logical metallic matrix influences signal transmission, if cutting is too deep, can generate damage to completed plastic part, reduce plastic part to gold
Belong to the booster action of shell.
If also, be not roughened, directly in metal shell inner surface casting resin, the plastic part formed at this time can not be
Metal shell is effectively protected in metal shell inner surface.
Meanwhile inventor has found in an experiment, when being molded on having apertured metal shell, the resin of molten state exists
After the resin for flowing into the possibility in gap, and flowing into gap flows into gap, it is difficult to be removed.And the appearance of shell is generated negative
It influences.In the present invention, by the way that the width in gap is set as 5-40 μm, and guarantee the transmission of communication signal by a plurality of gap,
And the spacing between adjacent two gaps is 0.3-1.6mm.Gap under above-mentioned condition is when being molded, the resin of molten state
Due to the effect of own face tension, it will not enter in gap, ensure that the exterior quality of metal shell.
In addition, the width in gap is set as 5-40 μm, and adjacent two on communication apparatus metal shell provided by the invention
Spacing between gap is 0.3-1.6mm, highly beneficial to subsequent production decorative layer, can effectively guarantee the decoration being prepared
Layer covering gap, will not leave the trace of recess at gap.
Detailed description of the invention
Fig. 1 is metallic matrix and plastic piece structure schematic diagram prepared by the embodiment of the present invention 1；
Fig. 2 is the cross section structure schematic diagram of communication apparatus metal shell prepared by the embodiment of the present invention 1.
Appended drawing reference in Figure of description is as follows:
1, metal shell；11, gap；2, plastic part；3, decorative layer.
Specific embodiment
In order to which the technical problems, technical solutions and beneficial effects solved by the present invention is more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
In the description of the present invention, it is to be understood that, the orientation or position of the instructions such as term " on ", "lower", "inner", "outside"
Setting relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, rather than
The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot
It is interpreted as limitation of the present invention.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or two with
On.
Communication apparatus metal shell provided by the invention includes metal shell and plastic part；It is offered on the metal shell
A plurality of gap；The gap width is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm；Where the gap
There are multiple micro- holes on the metal shell inner surface at position；Table in the metal shell at position where the plastic part is covered in gap
On face, and fill micro- hole.
For above-mentioned metal shell, material can be used various metals commonly used in the prior art, such as aluminium alloy, stainless
One of steel, magnesium alloy, kirsite.When being used as the shell of electronic product (such as mobile phone or tablet computer), in general, using
Aluminium alloy or stainless steel.
It is realized effective logical for guaranteeing that communication signal can effectively pass through metal shell itself in gap on metal shell
News.For above-mentioned gap, width is preferably 5-40 μm, more preferably 15-30um.Spacing between adjacent two gaps is
0.3-1.6mm, preferably 0.5-1.2mm.
For the specific width and spacing in above-mentioned gap, the communication that those skilled in the art can be realized by actual needs is believed
The conditions such as number classification and frequency are adjusted within the above range, and specific method of adjustment is it is known in the art that in the present invention
It repeats no more.
According to the present invention, metal shell inner surface has multiple micro- holes, and plastic part, can be firm by above-mentioned multiple micro- holes
It is fixed on metal shell inner surface, so that metal shell offer is effectively protected, it, can especially to the metal shell at gap
It effectively prevent situations such as deforming.
Due to the presence in above-mentioned micro- hole, increase the roughness of metal shell inner surface, convenient for plastic part is firmly fixed.
For above-mentioned micro- hole, diameter and depth can change in a big way, the present invention in, under preferable case, micro- hole it is straight
Diameter is 200-2000nm.In further preferred situation, the depth in micro- hole is 0.5-9.5 μm.
In the present invention, the inner surface of above-mentioned metal shell is defined as above-mentioned communication apparatus metal shell in communication apparatus
When, metal shell is towards the surface inside communication apparatus.It is set it should be understood that the outer surface of metal shell is defined as above-mentioned communication
When standby metal shell is in communication apparatus, surface of the metal shell towards the external world.
For above-mentioned plastic part, various plastics commonly used in the prior art are can be used in material, for example, the plastic part selects
From polyethylene, polypropylene, polyacetals, polystyrene, Noryl, polyethylene terephthalate, poly terephthalic acid
Butanediol ester, poly- naphthalenedicarboxylic acid ethylene glycol it, it is polyphenylene sulfide, polyimides, polyamidoimide, polyetherimide, polysulfones, poly-
Ether sulfone, polyether-ketone, polyethers ether magnesium, polycarbonate, polyamide, thermoplastic polyurethane, acrylonitrile-butadiene-styrene copolymer
One of.
It is described under preferable case in order to further increase the mechanical strength of plastic part in above-mentioned plastic-metal composite material
Plastic part includes plastic substrate and the glass fibre that is scattered in plastic substrate.On the basis of the content of the plastic substrate, institute
The content for stating glass fibre is 1%-50%wt.At this point, plastic substrate can be selected from polyethylene, polypropylene, polyacetals, polyphenyl second
Alkene, Noryl, polyethylene terephthalate, polybutylene terephthalate (PBT), poly- naphthalenedicarboxylic acid ethylene glycol it, it is poly-
Diphenyl sulfide, polyimides, polyamidoimide, polyetherimide, polysulfones, polyether sulfone, polyether-ketone, polyethers ether magnesium, polycarbonate,
Polyamide, thermoplastic polyurethane, any one in acrylonitrile-butadiene-styrene copolymer.
For the synergistic effect for improving glass fibre and plastic substrate, the mechanical property of plastic part, preferably feelings are further increased
Under condition, any one of the plastic substrate in polyphenylene sulfide, polycarbonate, polyamide.
According to the present invention, as the shell of communication apparatus, the appearance of above-mentioned communication apparatus metal shell directly influences logical
Interrogate the aesthetic measure of equipment.In the present invention, under preferable case, the metal shell outer surface is covered with non metallic decorative layer, institute
It states decorative layer and fills the gap.Nonmetallic decorative layer will not generate shielding action to the transmission of communication signal, also, decorate
Layer can play certain beautification function to metal shell.
For above-mentioned decorative layer, thickness can change in a big way, and only need can fill the gap on metal shell i.e.
It can.Under preferable case, the decorative layer thickness is 5-50 μm.For the material of decorative layer, it is not particularly limited in the present invention, it is excellent
In the case of choosing, when metal shell is aluminium alloy, the decorative layer is alumina layer.At this point, the alumina layer as decorative layer
On the one hand it can assign communication apparatus metal shell excellent texture, while excellent wear-resisting property being provided.Meanwhile above-mentioned decorative layer
It can also be organic coating, such as can be one of epoxy coating, acrylic resin coating.
Communication apparatus metal shell provided by the invention can be prepared by the following procedure method and be prepared, and specifically include:
S1, metallic matrix is provided, offers a plurality of gap on the metallic matrix；The gap width is 5-40 μm, phase
Spacing between adjacent two gaps is 0.3-1.6mm；
S2, roughening treatment is carried out to the metallic matrix inner surface at position where gap, forms metal shell；In metal shell
There are multiple micro- holes on surface；
S3, the casting resin on the metal shell inner surface at position where gap form plastic part.
In step S1, metallic matrix can be obtained by purchase or voluntarily processing.The slit width on metallic matrix need to only be met
Degree is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm.
If voluntarily processed, existing various cutting methods can be used, cutting processing is carried out to metal substrate, form above-mentioned seam
Gap then obtains metallic matrix.Specifically, the cutting method is selected from laser cutting, electron beam cutting, Water Cutting or wire cutting
One of.Or use CNC(numerically-controlled machine tool) carry out cutting processing.
When being cut using above-mentioned various methods, concrete operations and condition are commonly used in the prior art, for example, institute
State laser cutting condition are as follows: power 0-50W, cutting speed 20-3000mm/s, laser frequency 20-80kHz, output wave
A length of 1064nm.The gap width formed by the method for above-mentioned laser cutting is usually in 10-40um.
The electron beam cutting method are as follows: vacuum degree be 10-3-10-4It is 6-8mA, power in electric current in the environment of Pa
Density is 107W/cm2Under conditions of cut.The gap width formed by the method that above-mentioned electron beam is cut is usually in 5-
40um。
It provides after having apertured metallic matrix, as described in step S2, metallic matrix that need at least to position where gap
Inner surface carries out roughening treatment.In general, can all carry out roughening treatment to metallic matrix inner surface for convenience of operating.
According to the present invention, in the step S2, coarsing processing method are as follows: at 25 DEG C, by metallic matrix inner surface with it is dense
The hydrochloric acid solution that degree is 2-20%wt contacts 1-5min, then takes out metallic matrix, impregnates 1-5min into the water；
It repeats aforesaid operations 2-10 times, obtains metal shell.
At this point, at least position where gap has multiple micro- holes on metal shell inner surface.The diameter and depth in micro- hole can
It is controlled by controlling the time contacted with hydrochloric acid solution.In the present invention, the diameter in the micro- hole formed by the above method is
200-2000nm, the depth in micro- hole are 0.5-9.5 μm.
According to the present invention, such as step S3, after forming above-mentioned metal shell, need in the metal shell at position where gap table
Casting resin on face.
Conventional injection molding forming method can be used in the method for casting resin, for example, injection moulding process is to penetrate pressure 1600-
2400bar, pressure maintaining 800-1400bar are 80-150 DEG C using upper and lower mould temperature when oil temperature machine, and the injection time is 0.5-2s.
The resin used when above-mentioned injection molding is optional have it is existing various, such as can be selected from polyethylene, polypropylene, polyacetals,
Polystyrene, Noryl, polyethylene terephthalate, polybutylene terephthalate (PBT), poly- naphthalenedicarboxylic acid second two
Alcohol it, it is polyphenylene sulfide, polyimides, polyamidoimide, polyetherimide, polysulfones, polyether sulfone, polyether-ketone, polyethers ether magnesium, poly-
One of carbonic ester, polyamide, acrylonitrile-butadiene-styrene copolymer.
Likewise, in the step S3, the material that when injection molding uses is the mixture of resin and glass fibre, to prepare
Inside is dispersed with the plastic part of glass fibre.
Under preferable case, in said mixture, the resin is selected from one of polyphenylene sulfide, polycarbonate, polyamide；
On the basis of the weight of the resin, the content of the glass fibre is 1%-50%wt.
For the surface decoration effect for improving above-mentioned communication apparatus metal shell, under preferable case, after the step S3,
It further include forming non metallic decorative layer in metal shell outer surface, and decorative layer is made to fill the gap.
When making above-mentioned plastic part, since gap width is 5-40 μm, the spacing between adjacent two gaps is 0.3-
1.6mm, in injection molding, molten resin is influenced by own face tension, will not be entered gap, be ensure that the appearance of metal shell
Performance.
The method for making above-mentioned decorative layer can be existing various, such as can pass through anodic oxidation, differential arc oxidation, electrophoresis
Or prepared by the modes such as spraying.The thickness of above-mentioned decorative layer can be changed in a big way, under preferable case, the dress
Adorn layer with a thickness of 5-50 μm.Decorative layer can be existing various electronic products shell decorative layer, such as can be aluminium oxide
One of layer, epoxy coating, acrylic resin coating.
In the present invention, anode oxidation method can be used and form the decorative layer, the anodic oxidation condition are as follows: be with concentration
The sulfuric acid of 150-210g/L is as tank liquor, voltage 10-15V, current density 1-2A/dm2, temperature is 10-22 DEG C, anodic oxygen
The change time is 20-60min, and liquor of hole- sealing tank concentration is 1-10g/L, and sealing of hole temperature is 50-95 DEG C, and the sealing of hole time is 10-50min.
It is usually 10-30um by the decorative layer thickness that above-mentioned anode oxidation method is formed.
Alternatively, the decorative layer can also be formed by differential arc oxidation method, and the differential arc oxidation condition are as follows: pH 6-12,
Voltage is 0-800V, current density 1-10A/dm2, temperature is 15-60 DEG C, and time 10-60min, liquor of hole- sealing tank is water, envelope
Hole temperature is 70-90 DEG C, and the sealing of hole time is 1-10min.It is usually by the decorative layer thickness that above-mentioned differential arc oxidation method is formed
10-50um。
Alternatively, forming the decorative layer by electrophoresis, the deposition condition are as follows: ability cathode electrophoresis: voltage 20-60V, pH are
4-6, temperature are 15-30 DEG C, time 20-60s；Anodic electrophoresis: voltage 40-100V, pH 6-8, temperature are 15-30 DEG C,
Time is 40-90s；Baking temperature is 120-200 DEG C, baking time 30-60min.The dress formed by above-mentioned electrophoresis method
Adoring thickness degree is usually 5-35um.
By above-mentioned various methods decorative layer can be formed in metal shell outer surface.According to the present invention, above-mentioned decorative layer
Full gap need to be filled, as known to those skilled in the art, when using above-mentioned various method preparation decorative layers, interior decorative coat
Continuous accumulated growth, to ultimately form decorative layer.To achieve the purpose that decorative layer blind, control preparation time can be used
Etc. parameters be adjusted.
Simultaneously as plastics do not enter in gap when injection molding, have an impact when will not be to above-mentioned production decorative layer, guarantees
The exterior quality of communication apparatus metal shell.
The present invention is further detailed by the following examples.
Embodiment 1
The present embodiment is for illustrating communication apparatus metal shell disclosed by the invention and preparation method thereof.
Aluminium alloy (trade mark 6063) is selected to be used as metal substrate.
Gap is formed using laser cutting method.
Gap is carried out on the shell using laser-beam drilling machine (the model LSF20 laser-beam drilling machine of Chinese workers' laser production) to add
Work, the gap width are 20um, and adjacent slits spacing is 0.6mm.Laser processing power is 20W, speed 50mm/s, frequency
For 30kHz, wavelength 1064nm.
Obtain metallic matrix.
Oil removing, washing, alkaline etching, washing, pickling, washing process are carried out to above-mentioned metallic matrix, immerse pretreatment fluid later
Middle progress 5min pretreatment, 80 DEG C of baking 20min complete preprocessing process.
Then the hydrochloric acid solution 500ml that 10% is prepared in beaker, is put into 25 DEG C of thermostats and is warming up to 25 DEG C, will be above-mentioned
Metallic matrix is immersed, and is drawn off after 2min, is put into the beaker equipped with water and is impregnated 2min, with hypo acid bubble plus a water
Bubble is a circulation, so circulation 5 times, after last time water impregnates, product is put into 80 DEG C of baking ovens and is dried.Obtain metal-back
Body.Having diameter on metal shell is 300-1000nm, micro- hole that depth is 4 μm.
Above-mentioned metal shell is put into mold, is molded using polyphenylene sulfide.Injecting condition are as follows: penetrate pressure
2200bar, pressure maintaining 1200bar are 130 DEG C using upper and lower mould temperature when oil temperature machine, and the injection time is 1s.Form plastic part.
Decorative layer is prepared using anode oxidation method.
The complex of above-mentioned metal shell and plastic part is subjected to alkaline etching, washing, pickling, washing process, immerses contain later
Having concentration is the H of 180g/L2SO4In the electrolytic cell of aqueous solution, using metal shell as anode, stainless steel plate is as cathode, in electricity
Pressure is 15V, current density 1A/dm2, temperature be 19 DEG C under conditions of anodic oxidation 40min, complete anodic oxidation after take out simultaneously
Ultrasonic cleaning is clean, and the built-in acid in gap is avoided to influence subsequent coloring.
It is covered at this point, gap is filled by decorative layer completely, naked eyes are invisible.
There is the metal shell of alumina layer to immerse in prepared dye liquor above-mentioned surface and dyes 10min, the acidity
Dye liquor concentration is 5g/L, and pH value 5.5, the temperature of the dye liquor is 50 DEG C, takes out and cleans up after the completion.
Then in hole sealing agent (NiSO4Aqueous solution, concentration 10g/L) in impregnate 20min, temperature be 95 DEG C, complete sealing of hole
It is cleaned up afterwards with 90 DEG C of pure water, and toasts 15min under the conditions of 60 DEG C.Obtain the decorative layer with a thickness of 20um.
Finally obtain communication apparatus metal shell.
The structure of the above-mentioned communication apparatus metal shell being prepared is as depicted in figs. 1 and 2.Have on metal shell 1 more
A gap 11.There are multiple micro- hole (not shown)s on the inner surface of the metal shell 1 at position locating for gap 11.Plastic part 2
Covering is fixed on the inner surface of metal shell 1 at position locating for gap 11, and fills above-mentioned micro- hole.
Decorative layer 3, the blind 11 simultaneously of decorative layer 3 are attached on 1 outer surface of metal shell.
Embodiment 2
The present embodiment is for illustrating communication apparatus metal shell disclosed by the invention and preparation method thereof.
Aluminium alloy (trade mark 6063) is selected to be used as sheathing material.
Metal shell and plastic part are prepared according to the method for embodiment 1, unlike, it is prepared and is filled using differential arc oxidation method
Adorn layer.
The complex of above-mentioned metal shell and plastic part is subjected to ungrease treatment, is immersed in micro-arc oxidation electrolyte later,
Using metal shell as anode, stainless steel plate is 0-600V, current density 5A/dm in voltage as cathode2, temperature 25
Differential arc oxidation 30min under conditions of DEG C, taking-up is cleaned up with pure water after the completion.Obtain the metal that surface has differential arc oxidation layer
Shell.At this point, covering is filled by the alumina layer as differential arc oxidation layer completely in gap, naked eyes are invisible.
There is the metal shell of differential arc oxidation layer to immerse in the hot pure water that temperature is 85 DEG C surface to close 5min, then take
It dries up out.Obtain the decorative layer with a thickness of 25um.
Finally obtain communication apparatus metal shell.
Embodiment 3
The present embodiment is for illustrating communication apparatus metal shell disclosed by the invention and preparation method thereof.
Aluminium alloy (trade mark 6063) is selected to be used as sheathing material.
Gap is formed using electron beam cutting method, method particularly includes:
Metal substrate is put in a vacuum chamber, is evacuated to 10-3-10-4Pa, electric current 6-8mA pass through magnetic lens system
The spot that electron beam is pooled to diameter 20um, makes power density reach 107W/cm2Afterwards, several seams are formed on metal substrate
Gap, gap width 20um, gap spacing are 0.6mm.
Continuous preparation is same as Example 1 afterwards, finally obtains communication apparatus metal shell.
Embodiment 4
The present embodiment is for illustrating communication apparatus metal shell disclosed by the invention and preparation method thereof.
Aluminium alloy (trade mark 6063) is selected to be used as metal substrate.
Gap is formed using laser cutting method.
Gap is carried out on the shell using laser-beam drilling machine (the model LSF20 laser-beam drilling machine of Chinese workers' laser production) to add
Work, the gap width are 10um, and adjacent slits spacing is 0.3mm.Laser processing power is 10W, speed 500mm/s, frequency
Rate is 40kHz, wavelength 1064nm.
Obtain metallic matrix.
Oil removing, washing, alkaline etching, washing, pickling, washing process are carried out to above-mentioned metallic matrix, immerse pretreatment fluid later
Middle progress 5min pretreatment, 80 DEG C of baking 20min complete preprocessing process.
Then the hydrochloric acid solution 500ml that 5% is prepared in beaker, is put into 25 DEG C of thermostats and is warming up to 25 DEG C, by above-mentioned gold
Belong to matrix to be immersed, be drawn off after 4min, be put into the beaker equipped with water and impregnate 4min, with hypo acid bubble plus a bubble
It is recycled for one, so circulation 3 times, after last time water impregnates, product is put into 80 DEG C of baking ovens and is dried.Obtain metal-back
Body.Having diameter on metal shell is 200-800nm, micro- hole that depth is 2 μm.
Above-mentioned metal shell is put into mold, is molded using polyphenylene sulfide.Injecting condition are as follows: penetrate pressure
2400bar, pressure maintaining 1400bar are 150 DEG C using upper and lower mould temperature when oil temperature machine, and the injection time is 0.5s.Form plastic part.
Decorative layer is prepared using anode oxidation method.
The complex of above-mentioned metal shell and plastic part is subjected to alkaline etching, washing, pickling, washing process, immerses contain later
Having concentration is the H of 150g/L2SO4In the electrolytic cell of aqueous solution, using metal shell as anode, stainless steel plate is as cathode, in electricity
Pressure is 12V, current density 2A/dm2, temperature be 22 DEG C under conditions of anodic oxidation 20min, complete anodic oxidation after take out simultaneously
Ultrasonic cleaning is clean, and the built-in acid in gap is avoided to influence subsequent coloring.
It is covered at this point, gap is filled by decorative layer completely, naked eyes are invisible.
There is the metal shell of alumina layer to immerse in prepared dye liquor above-mentioned surface and dyes 10min, the acidity
Dye liquor concentration is 5g/L, and pH value 5.5, the temperature of the dye liquor is 50 DEG C, takes out and cleans up after the completion.
Then in hole sealing agent (NiSO4Aqueous solution, concentration 10g/L) in impregnate 20min, temperature be 95 DEG C, complete sealing of hole
It is cleaned up afterwards with 90 DEG C of pure water, and toasts 15min under the conditions of 60 DEG C.Obtain the decorative layer with a thickness of 5um.
Finally obtain communication apparatus metal shell.
Embodiment 5
The present embodiment is for illustrating communication apparatus metal shell disclosed by the invention and preparation method thereof.
Aluminium alloy (trade mark 6063) is selected to be used as metal substrate.
Gap is formed using laser cutting method.
Gap is carried out on the shell using laser-beam drilling machine (the model LSF20 laser-beam drilling machine of Chinese workers' laser production) to add
Work, the gap width are 40um, and adjacent slits spacing is 1.6mm.Laser processing power is 50W, speed 20mm/s, frequency
For 20kHz, wavelength 1064nm.
Obtain metallic matrix.
Oil removing, washing, alkaline etching, washing, pickling, washing process are carried out to above-mentioned metallic matrix, immerse pretreatment fluid later
Middle progress 5min pretreatment, 80 DEG C of baking 20min complete preprocessing process.
Then the hydrochloric acid solution 500ml that 15% is prepared in beaker, is put into 25 DEG C of thermostats and is warming up to 25 DEG C, will be above-mentioned
Metallic matrix is immersed, and is drawn off after 1min, is put into the beaker equipped with water and is impregnated 1min, with hypo acid bubble plus a water
Bubble is a circulation, so circulation 8 times, after last time water impregnates, product is put into 80 DEG C of baking ovens and is dried.Obtain metal-back
Body.Having diameter on metal shell is 500-1800nm, micro- hole that depth is 7 μm.
Above-mentioned metal shell is put into mold, is molded using polyphenylene sulfide.Injecting condition are as follows: penetrate pressure
1800bar, pressure maintaining 1000bar are 100 DEG C using upper and lower mould temperature when oil temperature machine, and the injection time is 1.5s.Form plastic part.
Decorative layer is prepared using anode oxidation method.
The complex of above-mentioned metal shell and plastic part is subjected to alkaline etching, washing, pickling, washing process, immerses contain later
Having concentration is the H of 210g/L2SO4In the electrolytic cell of aqueous solution, using metal shell as anode, stainless steel plate is as cathode, in electricity
Pressure is 10V, current density 1A/dm2, temperature be 10 DEG C under conditions of anodic oxidation 60min, complete anodic oxidation after take out
And ultrasonic cleaning is clean, and the built-in acid in gap is avoided to influence subsequent coloring.
It is covered at this point, gap is filled by decorative layer completely, naked eyes are invisible.
There is the metal shell of alumina layer to immerse in prepared dye liquor above-mentioned surface and dyes 10min, the acidity
Dye liquor concentration is 5g/L, and pH value 5.5, the temperature of the dye liquor is 50 DEG C, takes out and cleans up after the completion.
Then in hole sealing agent (NiSO4Aqueous solution, concentration 10g/L) in impregnate 20min, temperature be 95 DEG C, complete sealing of hole
It is cleaned up afterwards with 90 DEG C of pure water, and toasts 15min under the conditions of 60 DEG C.Obtain the decorative layer with a thickness of 50um.
Finally obtain communication apparatus metal shell.
Communication apparatus metal shell provided by the invention can be prepared by above-mentioned each method.The communication apparatus metal
There is gap on shell, passed through for communication signal, realize normal communication function.The plastic part of metal shell inner surface simultaneously
Good booster action is played to the metal shell at metal shell, especially gap, avoids deforming.In addition metal shell
Outer surface is covered with decorative layer, plays good decoration and protective effect to metal shell.Also, gap is avoided after blind
It is exposed, keep communication apparatus metal shell more attractive, simultaneously as decorative layer is nonmetallic materials, will not influence communication signal
Normal transmission.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (17)
1. a kind of communication apparatus metal shell, which is characterized in that including metal shell and plastic part；It is opened up on the metal shell
There is a plurality of gap；The gap width is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm；
There are on the metal shell inner surface at position multiple micro- holes where the gap；The plastic part is covered in gap place portion
On the metal shell inner surface of position, and fill micro- hole.
2. communication apparatus metal shell according to claim 1, which is characterized in that the gap width is 15-30 μm, phase
Spacing between adjacent two gaps is 0.5-1.2mm.
3. communication apparatus metal shell according to claim 1, which is characterized in that the diameter in micro- hole is 200-
2000nm。
4. communication apparatus metal shell according to claim 3, which is characterized in that the depth in micro- hole is 0.5-9.5 μ
m。
5. communication apparatus metal shell described in any one of -4 according to claim 1, which is characterized in that the metal shell
Outer surface is covered with non metallic decorative layer, and the decorative layer fills the gap.
6. communication apparatus metal shell according to claim 5, which is characterized in that the decorative layer thickness is 5-50 μm.
7. communication apparatus metal shell according to claim 6, which is characterized in that the metal shell material is aluminium conjunction
One of gold, stainless steel or kirsite；The decorative layer is alumina layer, in epoxy coating, acrylic resin coating
One kind.
8. the preparation method of the communication apparatus metal shell as described in any one of claim 1-7, which is characterized in that packet
It includes:
S1, metallic matrix is provided, offers a plurality of gap on the metallic matrix；The gap width be 5-40 μm, adjacent two
Spacing between gap is 0.3-1.6mm
S2, roughening treatment is carried out to the metallic matrix inner surface at position where gap, forms metal shell；Metal shell inner surface
It is upper that there are multiple micro- holes；
S3, the casting resin on the metal shell inner surface at position where gap form plastic part.
9. preparation method according to claim 8, which is characterized in that the step S1 includes: to carry out on metal substrate
Cutting forms gap；
The cutting method is selected from one of laser cutting, electron beam cutting, Water Cutting or wire cutting.
10. preparation method according to claim 9, which is characterized in that the cutting method is laser cutting, the laser
Cutting condition are as follows: power 0-50W, cutting speed 20-3000mm/s, laser frequency 20-80kHz, output wavelength are
1064nm；
Alternatively, the cutting method be electron beam cutting, the electron beam cutting method are as follows: vacuum degree be 10-3-10-4Pa's
It is 6-8mA, power density 10 in electric current in environment7W/cm2Under conditions of cut.
11. preparation method according to claim 8, which is characterized in that in the step S2, coarsing processing method are as follows:
At 25 DEG C, the hydrochloric acid solution that metallic matrix inner surface and concentration are 2-20%wt is contacted into 1-5min, then takes metallic matrix
Out, 1-5min is impregnated into the water；
It repeats aforesaid operations 2-10 times, obtains metal shell.
12. preparation method according to claim 11, which is characterized in that in the step S3, injection moulding process is to penetrate pressure
1600-2400bar, pressure maintaining 800-1400bar are 80-150 DEG C using upper and lower mould temperature when oil temperature machine, and the injection time is 0.5-2s.
13. preparation method according to claim 8, which is characterized in that further include in metal-back after the step S3
External surface forms non metallic decorative layer, and decorative layer is made to fill the gap.
14. preparation method according to claim 13, which is characterized in that form the decoration by anode oxidation method
Layer, the anodic oxidation condition are as follows: using concentration for 150-210g/L sulfuric acid as tank liquor, voltage 10-15V, current density
For 1-2A/dm2, temperature is 10-22 DEG C, anodizing time 20-60min, and liquor of hole- sealing tank concentration is 1-10g/L, sealing of hole temperature
Degree is 50-95 DEG C, and the sealing of hole time is 10-50min.
15. preparation method according to claim 13, which is characterized in that form the decoration by differential arc oxidation method
Layer, the differential arc oxidation condition are as follows: pH 6-12, voltage 0-800V, current density 1-10A/dm2, temperature 15-60
DEG C, time 10-60min, 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.
16. preparation method according to claim 13, which is characterized in that form the decorative layer, the electricity by electrophoresis
Swimming condition are as follows: ability cathode electrophoresis: voltage 20-60V, pH 4-6, temperature are 15-30 DEG C, time 20-60s；Anodic electrophoresis: electricity
Pressure is 40-100V, and pH 6-8, temperature is 15-30 DEG C, time 40-90s；Baking temperature is 120-200 DEG C, and baking time is
30-60min。
17. preparation method described in any one of 3-16 according to claim 1, which is characterized in that the decorative layer of formation
With a thickness of 5-50 μm.
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