CN104735941A - Communication equipment metal shell and manufacturing method thereof - Google Patents
Communication equipment metal shell and manufacturing method thereof Download PDFInfo
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- CN104735941A CN104735941A CN201310706436.8A CN201310706436A CN104735941A CN 104735941 A CN104735941 A CN 104735941A CN 201310706436 A CN201310706436 A CN 201310706436A CN 104735941 A CN104735941 A CN 104735941A
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Abstract
The invention provides a communication equipment metal shell to solve the problems that gaps of a communication equipment metal shell in the prior art are prone to damage and deformation and are not beneficial to manufacturing of a decorative layer. The communication equipment metal shell comprises a metal shell body and plastic parts. A plurality of gaps are formed in the metal shell body, the width of each gap is 5-40 micrometers, and the distance between two adjacent gaps is 0.3-1.6 mm. The inner surfaces of the positions, where the gaps are located, of the metal shell body are provided with a plurality of micro pits and are covered with the plastic parts, and the micro pits are filled with the plastic parts. The invention further discloses a manufacturing method of the communication equipment metal shell. The communication equipment metal shell can effectively guarantee normal communication of equipment, and the gaps of the shell are not prone to deformation; meanwhile, a decorative layer can be manufactured on the surface of the shell beneficially, and no mark will be formed on the gaps.
Description
Technical field
The present invention relates to electronics field, particularly relate to a kind of communication apparatus metal shell and preparation method thereof.
Background technology
For the portable electronic address equipment that mobile phone, panel computer, notebook computer etc. are similar, compared with plastic shell, metal shell has more attractive in appearance, have more texture, the feature that simultaneously performance such as wear-resisting damage resistant is more superior, therefore be no matter the angle from manufacturer or user, large area adopts metal shell to become development trend from now on.But in the prior art, because electromagnetic wave can not penetrating metal, therefore electronics can only adopt non-metal shell when designing, or adopt during metal shell and need to cut off at antenna place non-metallic material.
In prior art, for realizing, under the prerequisite adopting metal shell, ensureing the normal communication of communication apparatus, the metal shell at position corresponding to the antenna being typically employed in device interior offering gap, ensures that antenna can normally work.
But in these cases, the gap of metal shell is in following process process and very easily deforms and damage, and when especially metal shell having multiple gap, the distortion at the gap place of metal shell is even more serious.
Summary of the invention
Technical problem to be solved by this invention is for the fragile distortion in communication apparatus metal shell gap of the prior art place and is unfavorable for the problem making decorative layer, provides a kind of communication apparatus metal shell.
It is as follows that the present invention solves the problems of the technologies described above adopted technical scheme:
A kind of communication apparatus metal shell is provided, comprises metal shell and working of plastics; Described metal shell offers many gaps; Described gap width is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm; The metal shell inner surface at position, place, described gap has multiple micro-hole; Described working of plastics is covered on the metal shell inner surface at position, place, gap, and fills described micro-hole.
In communication apparatus metal shell provided by the invention, metal shell has gap, effectively can ensure antenna and extraneous Signal transmissions, realize communication.Meanwhile, due to the existence in micro-hole, working of plastics can be made firmly to be fixed on metal shell inner surface, to the protection that gap place carries out, effectively prevent the metal shell at gap place from occurring distortion.
Meanwhile, present invention also offers the preparation method of above-mentioned communication apparatus metal shell, comprising:
S1, provide metallic matrix, described metallic matrix offers many gaps; Described gap width is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm;
S2, roughening treatment is carried out to the metallic matrix inner surface at position, place, gap, form metal shell; Metal shell inner surface has multiple micro-hole;
S3, on the metal shell inner surface at position, place, gap casting resin, formed working of plastics.
Inventor is found by a large amount of tests, when preparing above-mentioned communication apparatus metal shell, needs first to crack on metallic matrix, to ensure the normal transmission of communication signal.And after cracking on metallic matrix, the metallic matrix at position, place, gap very easily deforms.Need strengthen.
In the present invention, after metallic matrix cracks, roughening treatment is carried out to metallic matrix inner surface, after forming micro-hole, carry out injection moulding again.If just crack after carrying out alligatoring and injection moulding, carry out cutting when cracking, cut shallow meeting and cause gap cannot complete through metallic matrix, affect Signal transmissions, if cut dark, damage can be produced to completed working of plastics, reduce working of plastics to the booster action of metal shell.
Further, if do not carry out alligatoring, directly at metal shell inner surface casting resin, the working of plastics now formed effectively cannot be protected metal shell at metal shell inner surface.
Meanwhile, inventor finds in an experiment, and on the apertured metal shell of tool during injection moulding, the resin of molten state exists the possibility flowing into gap, and after flowing into the resin inflow gap in gap, is difficult to be eliminated.And the outward appearance of housing is had a negative impact.In the present invention, by the width in gap is set as 5-40 μm, and ensured the transmission of communication signal by many gaps, and the spacing between adjacent two gaps is 0.3-1.6mm.Gap under above-mentioned condition is when carrying out injection moulding, and the resin of molten state, due to the effect of its own face tension force, can not enter in gap, ensure that the exterior quality of metal shell.
In addition, on communication apparatus metal shell provided by the invention, the width in gap is set as 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm, very favourable to follow-up making decorative layer, effectively can ensure that the decorative layer prepared covers gap, the vestige of depression can not be left at gap place.
Accompanying drawing explanation
Fig. 1 is metallic matrix and the plastic piece structure schematic diagram of the embodiment of the present invention 1 preparation;
Fig. 2 is the cross section structure schematic diagram of communication apparatus metal shell prepared by the embodiment of the present invention 1.
Reference numeral in Figure of description is as follows:
1, metal shell; 11, gap; 2, working of plastics; 3, decorative layer.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In describing the invention, it will be appreciated that, term " on ", D score, " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
Communication apparatus metal shell provided by the invention comprises metal shell and working of plastics; Described metal shell offers many gaps; Described gap width is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm; The metal shell inner surface at position, place, described gap has multiple micro-hole; Described working of plastics is covered on the metal shell inner surface at position, place, gap, and fills described micro-hole.
For above-mentioned metal shell, its material can adopt various metals conventional in prior art, such as, one in aluminium alloy, stainless steel, magnesium alloy, kirsite.When being used as the shell of electronic product (such as mobile phone or panel computer), usually, aluminium alloy or stainless steel is adopted.
Gap on metal shell, for ensureing that communication signal effectively can pass metal shell itself, realizes effective communication.For above-mentioned gap, its width is preferably 5-40 μm, is more preferably 15-30um.Spacing between adjacent two gaps is 0.3-1.6mm, is preferably 0.5-1.2mm.
For concrete width and the spacing in above-mentioned gap, the condition such as communication signal classification and frequency that those skilled in the art realize by actual needs adjusts in above-mentioned scope, and concrete method of adjustment is well known in the art, repeats no more in the present invention.
According to the present invention, metal shell inner surface has multiple micro-hole, and working of plastics is by above-mentioned multiple micro-hole; can firmly be fixed on metal shell inner surface; thus provide effective protection to metal shell, especially to the metal shell at gap place, effectively the situations such as distortion can be prevented.
Due to the existence in above-mentioned micro-hole, the roughness of metal shell inner surface is increased, is convenient to firmly fixed plastics part.For above-mentioned micro-hole, its diameter and the degree of depth can change in a big way, and in the present invention, under preferable case, the diameter in described micro-hole is 200-2000nm.Under further preferable case, the degree of depth in described micro-hole is 0.5-9.5 μm.
In the present invention, the inner surface of above-mentioned metal shell be defined as above-mentioned communication apparatus metal shell in communication apparatus time, metal shell is towards the surface of communication apparatus inside.Understandable, the outer surface of metal shell be defined as above-mentioned communication apparatus metal shell in communication apparatus time, metal shell is towards the surface in the external world.
For above-mentioned working of plastics, its material can adopt various plastics conventional in prior art, such as, described working of plastics be selected from polyethylene, polypropylene, polyacetals, polystyrene, Noryl, PETG, polybutylene terephthalate (PBT), poly-naphthalenedicarboxylic acid ethylene glycol it, one in polyphenylene sulfide, polyimides, polyamidoimide, Polyetherimide, polysulfones, polyether sulfone, polyether-ketone, polyethers ether magnesium, Merlon, polyamide, thermoplastic polyurethane, acrylonitrile-butadiene-styrene copolymer.
In order to improve the mechanical strength of working of plastics in above-mentioned plastic-metal composite material further, under preferable case, described working of plastics comprises plastic substrate and is scattered in the glass fibre in plastic substrate.With the content of described plastic substrate for benchmark, the content of described glass fibre is 1%-50%wt.Now, plastic substrate can be selected from polyethylene, polypropylene, polyacetals, polystyrene, Noryl, PETG, polybutylene terephthalate (PBT), poly-naphthalenedicarboxylic acid ethylene glycol it, any one in polyphenylene sulfide, polyimides, polyamidoimide, Polyetherimide, polysulfones, polyether sulfone, polyether-ketone, polyethers ether magnesium, Merlon, polyamide, thermoplastic polyurethane, acrylonitrile-butadiene-styrene copolymer.
For improving the synergy of glass fibre and plastic substrate, improve further the mechanical property of working of plastics, under preferable case, described plastic substrate be selected from polyphenylene sulfide, Merlon, polyamide any one.
According to the present invention, as the shell of communication apparatus, the outward appearance of above-mentioned communication apparatus metal shell directly has influence on the aesthetic measure of communication apparatus.In the present invention, under preferable case, described metal shell outer surface is coated with non metallic decorative layer, and described decorative layer fills described gap.Nonmetallic decorative layer can not produce shielding action to the transmission of communication signal, and decorative layer can play certain beautification function to metal shell.
For above-mentioned decorative layer, its thickness can change in a big way, only needs the gap can filled on metal shell.Under preferable case, described decorative layer thickness is 5-50 μm.For the material of decorative layer, be not particularly limited in the present invention, under preferable case, when metal shell is aluminium alloy, described decorative layer is alumina layer.Now, the alumina layer as decorative layer can give the texture of communication apparatus metal shell excellence on the one hand, provides excellent anti-wear performance simultaneously.Meanwhile, above-mentioned decorative layer can also be organic coating, such as, can be the one in epoxy coating, acrylic resin coating.
Communication apparatus metal shell provided by the invention prepares by following preparation method, specifically comprises:
S1, provide metallic matrix, described metallic matrix offers many gaps; Described gap width is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm;
S2, roughening treatment is carried out to the metallic matrix inner surface at position, place, gap, form metal shell; Metal shell inner surface has multiple micro-hole;
S3, on the metal shell inner surface at position, place, gap casting resin, formed working of plastics.
In step S1, metallic matrix obtains by buying or processing voluntarily.Only the gap width that need meet on metallic matrix is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm.
As processed voluntarily, existing various cutting method can be adopted to carry out cutting processing to metal substrate, form above-mentioned gap, then obtain metallic matrix.Concrete, described cutting method is selected from the one in laser cutting, electron beam cutting, Water Cutting or Linear cut.Or adopt CNC(Digit Control Machine Tool) carry out cutting processing.
When adopting above-mentioned various method to cut, its concrete operations and condition are conventional in prior art, and such as, described laser cutting condition is: power is 0-50W, and cutting speed is 20-3000mm/s, and laser frequency is 20-80kHz, and output wavelength is 1064nm.The gap width formed by the method for above-mentioned laser cutting is usually at 10-40um.
Described electron beam cutting method is: be 10 in vacuum degree
-3-10
-4in the environment of Pa, be 6-8mA at electric current, power density is 10
7w/cm
2condition under cut.The gap width that the method for being cut by above-mentioned electron beam is formed is usually at 5-40um.
After the apertured metallic matrix of tool is provided, as described in step S2, at least roughening treatment need be carried out to the metallic matrix inner surface at position, place, gap.Usually, for convenience of operation, all roughening treatment can be carried out to metallic matrix inner surface.
According to the present invention, in described step S2, coarsing processing method is: at 25 DEG C, and the hydrochloric acid solution being 2-20%wt by metallic matrix inner surface and concentration contacts 1-5min, is then taken out by metallic matrix, puts into water and soak 1-5min;
Repeat aforesaid operations 2-10 time, obtain metal shell.
Now, on metal shell inner surface, at least position, place, gap has multiple micro-hole.The diameter in micro-hole controls by the time controlling to contact with hydrochloric acid solution with the degree of depth.In the present invention, the diameter in the micro-hole formed by said method is 200-2000nm, and the degree of depth in described micro-hole is 0.5-9.5 μm.
According to the present invention, as step S3, after forming above-mentioned metal shell, need on the metal shell inner surface at position, place, gap casting resin.
The method of casting resin can adopt conventional injection molding forming method, and such as, injection moulding process is for penetrating pressure 1600-2400bar, pressurize 800-1400bar, and during use oil temperature machine, upper and lower mould temperature is 80-150 DEG C, and the injection time is 0.5-2s.
The resin adopted during above-mentioned injection moulding is optional have existing various, such as optional from polyethylene, polypropylene, polyacetals, polystyrene, Noryl, PETG, polybutylene terephthalate (PBT), poly-naphthalenedicarboxylic acid ethylene glycol it, one in polyphenylene sulfide, polyimides, polyamidoimide, Polyetherimide, polysulfones, polyether sulfone, polyether-ketone, polyethers ether magnesium, Merlon, polyamide, acrylonitrile-butadiene-styrene copolymer.
Same, in described step S3, the material adopted during injection moulding is the mixture of resin and glass fibre, thus preparation inner dispersion has the working of plastics of glass fibre.
Under preferable case, in said mixture, described resin is selected from the one in polyphenylene sulfide, Merlon, polyamide; With the weight of described resin for benchmark, the content of described glass fibre is 1%-50%wt.
For improving the surface decoration effect of above-mentioned communication apparatus metal shell, under preferable case, after described step S3, being also included in metal shell outer surface and forming non metallic decorative layer, and making decorative layer fill described gap.
When making above-mentioned working of plastics, because gap width is 5-40 μm, the spacing between adjacent two gaps is 0.3-1.6mm, and when injection moulding, molten resin affects by its own face tension force, can not enter gap, ensure that the appearance property of metal shell.
The method making above-mentioned decorative layer for existing various, such as, can be prepared by modes such as anodic oxidation, differential arc oxidation, electrophoresis or sprayings.Thickness for above-mentioned decorative layer can change in a big way, and under preferable case, the thickness of described decorative layer is 5-50 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, and described anodic oxidation condition is: 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, 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.The decorative layer thickness formed by above-mentioned anode oxidation method is generally 10-30um.
Or also form described decorative layer by differential arc oxidation method, described differential arc oxidation condition is: pH is 6-12, and voltage is 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 10-50um.
Or form described decorative layer by electrophoresis, described deposition condition is: 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 5-35um.
Decorative layer can be formed at metal shell outer surface by above-mentioned various method.According to the present invention, above-mentioned decorative layer need fill full gap, as known to those skilled in the art, when adopting above-mentioned various method to prepare decorative layer, and the continuous accumulated growth of interior decorative coat, thus finally form decorative layer.For reaching the object of decorative layer blind, parameters such as controlling preparation time can be adopted to adjust.
Meanwhile, during due to injection moulding, plastics do not enter in gap, can not have an impact, ensure that the exterior quality of communication apparatus metal shell to during above-mentioned making decorative layer.
By the following examples the present invention is further detailed.
Embodiment 1
The present embodiment is for illustration of communication apparatus metal shell disclosed by the invention and preparation method thereof.
Aluminium alloy (trade mark is 6063) is as metal substrate.
Laser cutting method is adopted to form gap.
Adopt laser-beam drilling machine (model of Chinese workers' laser production is LSF20 laser-beam drilling machine) to carry out gap processing on shell, described gap width is 20um, and adjacent slits spacing is 0.6mm.Laser processing power is 20W, and speed is 50mm/s, and frequency is 30kHz, and wavelength is 1064nm.
Obtain metallic matrix.
Carry out oil removing, washing, alkaline etching, washing, pickling, washing process to above-mentioned metallic matrix, immerse in pretreatment fluid afterwards and carry out 5min preliminary treatment, 80 DEG C are dried 20min, complete preprocessing process.
Then in beaker, prepare the hydrochloric acid solution 500ml of 10%, put into 25 DEG C of thermostats and be warming up to 25 DEG C, above-mentioned metallic matrix is immersed, taken out after 2min, put into the beaker that water is housed and soak 2min, adding a bubble with a hypo acid bubble is a circulation, so circulation 5 times, after last water soaking, product is put into 80 DEG C of baking ovens and dry.Obtain metal shell.Metal shell having diameter is 300-1000nm, and the degree of depth is micro-hole of 4 μm.
Above-mentioned metal shell is put into mould, adopts polyphenylene sulfide to carry out injection moulding.Injecting condition is: penetrate pressure 2200bar, pressurize 1200bar, and during use oil temperature machine, upper and lower mould temperature is 130 DEG C, and the injection time is 1s.Form working of plastics.
Anode oxidation method is adopted to prepare decorative layer.
The complex of above-mentioned metal shell and working of plastics 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 metal shell 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.
The metal shell above-mentioned surface with alumina layer immerses in the dye liquor prepared the 10min that dyes, and this acid dye liquor concentration is 5g/L, and pH value is 5.5, and 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 20um.
Finally obtain communication apparatus metal shell.
The structure of the above-mentioned communication apparatus metal shell prepared as depicted in figs. 1 and 2.Metal shell 1 has multiple gap 11.The inner surface of the metal shell 1 at position residing for gap 11 has multiple micro-holes (not shown).Working of plastics 2 covers and is fixed on the inner surface of metal shell 1 at position residing for gap 11, and fills above-mentioned micro-hole.
Metal shell 1 outer surface is attached with decorative layer 3, decorative layer 3 blind 11 simultaneously.
Embodiment 2
The present embodiment is for illustration of communication apparatus metal shell disclosed by the invention and preparation method thereof.
Aluminium alloy (trade mark is 6063) is as sheathing material.
Metal shell and working of plastics is prepared according to the method for embodiment 1, unlike, adopt differential arc oxidation method to prepare decorative layer.
The complex of above-mentioned metal shell and working of plastics is carried out ungrease treatment, and immerse in micro-arc oxidation electrolyte afterwards, using metal shell as anode, corrosion resistant plate, as negative electrode, is 0-600V at voltage, and current density is 5A/dm
2, temperature is differential arc oxidation 30min under the condition of 25 DEG C, and after completing, taking-up pure water cleans up.Obtain the metal shell that surface has differential arc oxidation layer.Now, gap is filled by the alumina layer as differential arc oxidation layer cover completely, and naked eyes are invisible.
Metal shell immersion temperature surface with differential arc oxidation layer is close 5min in the hot pure water of 85 DEG C, then takes out and dries up.Obtain the decorative layer that thickness is 25um.
Finally obtain communication apparatus metal shell.
Embodiment 3
The present embodiment is for illustration of communication apparatus metal shell disclosed by the invention and preparation method thereof.
Aluminium alloy (trade mark is 6063) is as sheathing material.
Adopt electron beam cutting method to form gap, concrete grammar is:
Metal substrate is put in a vacuum chamber, be evacuated to 10
-3-10
-4pa, electric current is 6-8mA, by magnetic lens system, electron beams converge is become the spot of diameter 20um, makes power density reach 10
7w/cm
2after, metal substrate is formed some gaps, and gap width is 20um, and gap spacing is 0.6mm.
Rear continuous preparation is identical with embodiment 1, finally obtains communication apparatus metal shell.
Embodiment 4
The present embodiment is for illustration of communication apparatus metal shell disclosed by the invention and preparation method thereof.
Aluminium alloy (trade mark is 6063) is as metal substrate.
Laser cutting method is adopted to form gap.
Adopt laser-beam drilling machine (model of Chinese workers' laser production is LSF20 laser-beam drilling machine) to carry out gap processing on shell, described gap width is 10um, and adjacent slits spacing is 0.3mm.Laser processing power is 10W, and speed is 500mm/s, and frequency is 40kHz, and wavelength is 1064nm.
Obtain metallic matrix.
Carry out oil removing, washing, alkaline etching, washing, pickling, washing process to above-mentioned metallic matrix, immerse in pretreatment fluid afterwards and carry out 5min preliminary treatment, 80 DEG C are dried 20min, complete preprocessing process.
Then in beaker, prepare the hydrochloric acid solution 500ml of 5%, put into 25 DEG C of thermostats and be warming up to 25 DEG C, above-mentioned metallic matrix is immersed, taken out after 4min, put into the beaker that water is housed and soak 4min, adding a bubble with a hypo acid bubble is a circulation, so circulation 3 times, after last water soaking, product is put into 80 DEG C of baking ovens and dry.Obtain metal shell.Metal shell having diameter is 200-800nm, and the degree of depth is micro-hole of 2 μm.
Above-mentioned metal shell is put into mould, adopts polyphenylene sulfide to carry out injection moulding.Injecting condition is: penetrate pressure 2400bar, pressurize 1400bar, and during use oil temperature machine, upper and lower mould temperature is 150 DEG C, and the injection time is 0.5s.Form working of plastics.
Anode oxidation method is adopted to prepare decorative layer.
The complex of above-mentioned metal shell and working of plastics is carried out alkaline etching, washing, pickling, washing process, immerses afterwards and fill the H that concentration is 150g/L
2sO
4in the electrolysis tank of the aqueous solution, using metal shell as anode, corrosion resistant plate, as negative electrode, is 12V at voltage, and current density is 2A/dm
2, temperature is the condition anodic oxygen 20min of 22 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.
The metal shell above-mentioned surface with alumina layer immerses in the dye liquor prepared the 10min that dyes, and this acid dye liquor concentration is 5g/L, and pH value is 5.5, and 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 5um.
Finally obtain communication apparatus metal shell.
Embodiment 5
The present embodiment is for illustration of communication apparatus metal shell disclosed by the invention and preparation method thereof.
Aluminium alloy (trade mark is 6063) is as metal substrate.
Laser cutting method is adopted to form gap.
Adopt laser-beam drilling machine (model of Chinese workers' laser production is LSF20 laser-beam drilling machine) to carry out gap processing on shell, described gap width is 40um, and adjacent slits spacing is 1.6mm.Laser processing power is 50W, and speed is 20mm/s, and frequency is 20kHz, and wavelength is 1064nm.
Obtain metallic matrix.
Carry out oil removing, washing, alkaline etching, washing, pickling, washing process to above-mentioned metallic matrix, immerse in pretreatment fluid afterwards and carry out 5min preliminary treatment, 80 DEG C are dried 20min, complete preprocessing process.
Then in beaker, prepare the hydrochloric acid solution 500ml of 15%, put into 25 DEG C of thermostats and be warming up to 25 DEG C, above-mentioned metallic matrix is immersed, taken out after 1min, put into the beaker that water is housed and soak 1min, adding a bubble with a hypo acid bubble is a circulation, so circulation 8 times, after last water soaking, product is put into 80 DEG C of baking ovens and dry.Obtain metal shell.Metal shell having diameter is 500-1800nm, and the degree of depth is micro-hole of 7 μm.
Above-mentioned metal shell is put into mould, adopts polyphenylene sulfide to carry out injection moulding.Injecting condition is: penetrate pressure 1800bar, pressurize 1000bar, and during use oil temperature machine, upper and lower mould temperature is 100 DEG C, and the injection time is 1.5s.Form working of plastics.
Anode oxidation method is adopted to prepare decorative layer.
The complex of above-mentioned metal shell and working of plastics is carried out alkaline etching, washing, pickling, washing process, immerses afterwards and fill the H that concentration is 210g/L
2sO
4in the electrolysis tank of the aqueous solution, using metal shell as anode, corrosion resistant plate, as negative electrode, is 10V at voltage, and current density is 1A/dm
2, temperature is the condition anodic oxygen 60min of 10 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.
The metal shell above-mentioned surface with alumina layer immerses in the dye liquor prepared the 10min that dyes, and this acid dye liquor concentration is 5g/L, and pH value is 5.5, and 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 50um.
Finally obtain communication apparatus metal shell.
Communication apparatus metal shell provided by the invention can be prepared by above-mentioned each method.This communication apparatus metal shell has gap, can pass for communication signal, realize normal communication function.The working of plastics of metal shell inner surface is to metal shell simultaneously, and especially the metal shell at gap place plays good booster action, avoids deforming.Metal shell outer surface is coated with decorative layer in addition, plays good decoration and protective effect to metal shell.Further, after blind, avoid gap to expose, make communication apparatus metal shell more attractive in appearance, meanwhile, because decorative layer is nonmetallic materials, the normal transmission of communication signal can not be affected.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. a communication apparatus metal shell, is characterized in that, comprises metal shell and working of plastics; Described metal shell offers many gaps; Described gap width is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm;
The metal shell inner surface at position, place, described gap has multiple micro-hole; Described working of plastics is covered on the metal shell inner surface at position, place, gap, and fills described micro-hole.
2. communication apparatus metal shell according to claim 1, is characterized in that, described gap width is 15-30 μm, and the spacing between adjacent two gaps is 0.5-1.2mm.
3. communication apparatus metal shell according to claim 1, is characterized in that, the diameter in described micro-hole is 200-2000nm.
4. communication apparatus metal shell according to claim 3, is characterized in that, the degree of depth in described micro-hole is 0.5-9.5 μm.
5. according to the communication apparatus metal shell in claim 1-4 described in any one, it is characterized in that, described metal shell outer surface is coated with non metallic decorative layer, and described decorative layer fills described gap.
6. communication apparatus metal shell according to claim 5, is characterized in that, described decorative layer thickness is 5-50 μm.
7. communication apparatus metal shell according to claim 6, is characterized in that, described metal shell material is the one in aluminium alloy, stainless steel or kirsite; Described decorative layer is the one in alumina layer, epoxy coating, acrylic resin coating.
8., as the preparation method of the communication apparatus metal shell in claim 1-7 as described in any one, it is characterized in that, comprising:
S1, provide metallic matrix, described metallic matrix offers many gaps; Described gap width is 5-40 μm, and the spacing between adjacent two gaps is 0.3-1.6mm
S2, roughening treatment is carried out to the metallic matrix inner surface at position, place, gap, form metal shell; Metal shell inner surface has multiple micro-hole;
S3, on the metal shell inner surface at position, place, gap casting resin, formed working of plastics.
9. preparation method according to claim 8, is characterized in that, described step S1 comprises: cut on metal substrate, forms gap;
Described cutting method is selected from the one in laser cutting, electron beam cutting, Water Cutting or Linear cut.
10. preparation method according to claim 9, is characterized in that, described cutting method is laser cutting, and described laser cutting condition is: power is 0-50W, and cutting speed is 20-3000mm/s, and laser frequency is 20-80kHz, and output wavelength is 1064nm;
Or described cutting method is electron beam cutting, and described electron beam cutting method is: be 10 in vacuum degree
-3-10
-4in the environment of Pa, be 6-8mA at electric current, power density is 10
7w/cm
2condition under cut.
11. preparation methods according to claim 8, is characterized in that, in described step S2, coarsing processing method is: at 25 DEG C, the hydrochloric acid solution being 2-20%wt by metallic matrix inner surface and concentration contacts 1-5min, is then taken out by metallic matrix, puts into water and soak 1-5min;
Repeat aforesaid operations 2-10 time, obtain metal shell.
12. preparation methods according to claim 11, is characterized in that, in described step S3, injection moulding process is for penetrating pressure 1600-2400bar, pressurize 800-1400bar, and during use oil temperature machine, upper and lower mould temperature is 80-150 DEG C, and the injection time is 0.5-2s.
13. preparation methods according to claim 8, is characterized in that, after described step S3, are also included in metal shell outer surface and form non metallic decorative layer, and make decorative layer fill described gap.
14. preparation methods according to claim 13, is characterized in that, form described decorative layer by anode oxidation method, and described anodic oxidation condition is: 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, 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.
15. preparation methods according to claim 13, is characterized in that, form described decorative layer by differential arc oxidation method, and described differential arc oxidation condition is: pH is 6-12, and voltage is 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.
16. preparation methods according to claim 13, is characterized in that, form described decorative layer by electrophoresis, and described deposition condition is: 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.
17., according to the preparation method in claim 13-16 described in any one, is characterized in that, the thickness of the described decorative layer of formation is 5-50 μm.
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