CN108353230A - The manufacturing method and sound equipment magnesium oscillating plate of sound equipment magnesium oscillating plate - Google Patents
The manufacturing method and sound equipment magnesium oscillating plate of sound equipment magnesium oscillating plate Download PDFInfo
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- CN108353230A CN108353230A CN201680063238.6A CN201680063238A CN108353230A CN 108353230 A CN108353230 A CN 108353230A CN 201680063238 A CN201680063238 A CN 201680063238A CN 108353230 A CN108353230 A CN 108353230A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
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- Acoustics & Sound (AREA)
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention, which provides one kind, can expeditiously manufacture that rustless property is good, and have the manufacturing method of the sound equipment magnesium oscillating plate of good acoustic characteristic.By in closed container, more than 1.1 atmospheric pressure, under the condition of high voltage of 350 following degree of atmospheric pressure, the antirust treatment step that hydroxide layer 2 is formed on the surface of magnesium substrates 1, can make the hydroxide layer 2 being formed on the surface of magnesium substrates 1 become the fine and closely woven and high person of hardness.Therefore, it can be promoted by keeping magnesium substrates 1 thinning, and using the hardness of antirust treatment, can inhibit the increase of weight, therefore can manufacture and the sound equipment magnesium oscillating plate of acoustic characteristic is promoted by lightweight and raising case hardness.
Description
Technical field
The present invention relates to one kind can efficiently manufacture light weight and with high surface hardness, acoustic characteristic and to rustless property it is excellent
The manufacturing method and sound equipment magnesium oscillating plate of the sound equipment magnesium oscillating plate of different sound equipment magnesium oscillating plate.
Background technology
As the material of sound equipment oscillating plate, a variety of materials such as aluminium, titanium, magnesium, paper, plastics are used.Magnesium is as these materials
Practical metal material in material, hardness most light and that there is appropriateness, and this high excellent characteristic of the Decay Rate with vibration.Cause
This, including the magnesium substrates of magnesium or magnesium base alloy are preferably used as sound equipment with the material of oscillating plate.If using the material comprising magnesium substrates
Material then can get the sound equipment oscillating plate for the speciality that good acoustic characteristic is shown until having supreme range.By making material
Expect thinning, the quality of sound equipment oscillating plate becomes smaller and acoustic characteristic is promoted, therefore is just seeking a kind of keeping magnesium substrates thinning
Method.
But although magnesium substrates have the speciality, there is this disadvantage that gets rusty easily.Therefore, it is used when as sound equipment
When the material of oscillating plate, it is necessary to implement antirust treatment to magnesium substrates surface.Before, it as antirust treatment, carries out anodic oxidation, change
At treated electrodeposition coating, using the coating etc. of coating, these processing, which can be used alone or combine a variety of processing, to be made
With.As the antirust treatments for being composed a variety of processing, such as also carry out following processing：Apply in ceramic series solvent high
Voltage forms ceramic layer to carry out plasma anodization processing, and resin is coated with from ceramic layer.
As an example of antirust treatment, records form hydroxide layer on magnesium substrates surface in patent document 1
Method.
It is formed using acrylic resin as principal component on magnesium substrates surface in addition, recording in patent document 2
The method of electrodeposition coating film.
The method that hydroxide layer is formed by plasma anodization is recorded in patent document 3.
Existing technical literature
Patent document
Patent document 1：Japanese Patent No. 4734035
Patent document 2：Japanese Patent No. 4307172
Patent document 3：Japanese Patent No. 5345155
Invention content
Problem to be solved by the invention
In patent document 1 in recorded antirust treatment, be formed on magnesium substrates surface using magnesium hydroxide as leading
The surface-treated layer (hydroxide layer) of ingredient is due to thin and not fine and closely woven, and there are this insufficient projects of rust-preventing characteristic.In addition, shape
Hardness at the hydroxide layer on magnesium substrates surface is low, therefore there is also this insufficient projects of the spread speed of sound.
Recorded method is using resin covering magnesium substrates surface in patent document 2, therefore case hardness is lower.Therefore,
There are this slack-off projects of the conduction of velocity of the sound on the surface of sound equipment magnesium oscillating plate.
Recorded method needs make to conduct to connect in sound equipment on magnesium oscillating plate in patent document 2 and patent document 3
Point.Therefore, it must need to carry out trimming (trimming) step after carrying out surface antirust treatment.In this trimming process,
The section of magnesium substrates exposes, and forms the part for not carrying out antirust treatment.If the part that magnesium substrates expose is kept intact, deposit
Become the worry for the point (getting rusty a little) for generating rust behind, therefore, the magnesium substrates exposed in order to prevent in trimming process become
It gets rusty a little, antirust treatment is needed after trimming process, therefore there are manufacture efficiencies to decline this project.
It is an object of the invention to solve the problem, one kind is provided and can expeditiously be manufactured has good acoustic characteristic
Sound equipment magnesium oscillating plate manufacturing method and light weight and with high surface hardness sound equipment magnesium oscillating plate.
Technical means to solve problem
The present invention provided in order to solve the problem is as described below.
(1) a kind of sound equipment manufacturing method of magnesium oscillating plate, has under the condition of high voltage higher than standard atmospheric pressure,
It is immersed in the antirust treatment step that hydroxide layer is formed on the surface of the magnesium substrates in the aqueous solution of alkalinity.
(2) manufacturing method of the sound equipment magnesium oscillating plate described according to (1), wherein the antirust treatment step exists
It is carried out in closed container.
(3) manufacturing method of the sound equipment magnesium oscillating plate described according to (2), wherein in the antirust treatment step
Reaction temperature be 50 DEG C or more, in 300 DEG C or less of range, pressure is more than 1.1 atmospheric pressure, below 350 atmospheric pressure
In the range of.
(4) manufacturing method for the sound equipment magnesium oscillating plate that any one of (1) to (3) is recorded according to, wherein passing through institute
It is 1mm or less that antirust treatment step, which is stated, come the plate thickness of the magnesium substrates before being handled.
(5) manufacturing method for the sound equipment magnesium oscillating plate that any one of (1) to (4) is recorded according to, wherein described anti-
Rust processing step is 0.01 μm or more, forms the hydrogen in 20 μm or less of range in thickness on the magnesium substrates surface
Oxide skin(coating).
(6) manufacturing method for the sound equipment magnesium oscillating plate that any one of (1) to (5) is recorded according to, wherein described
Before antirust treatment step, has the trimming step that magnesium substrates are cut from the matrix band comprising magnesium or the magnesium substrates of magnesium base alloy
Suddenly.
(7) manufacturing method for the sound equipment magnesium oscillating plate that any one of (1) to (5) is recorded according to, wherein described
After antirust treatment step, has the trimming step that magnesium substrates are cut from the matrix band comprising magnesium or the magnesium substrates of magnesium base alloy
Suddenly.
(8) manufacturing method for the sound equipment magnesium oscillating plate that any one of (1) to (7) is recorded according to, wherein described anti-
Processing step of becoming rusty is the hydroxide layer to be formed on the surface of the magnesium substrates, and formed in the inside of the magnesium substrates
The step of hydroxide layer.
(9) a kind of sound equipment magnesium oscillating plate, it is characterised in that：Hydroxide layer is formed on the surface of magnesium substrates, and
The hydroxide layer is to form the person until the inside of the magnesium substrates.
The effect of invention
It can be in magnesium-based by carrying out antirust treatment step under the condition of high voltage higher than standard atmospheric pressure according to the present invention
Hydroxide layer that is fine and closely woven and stablizing is formed on the surface of material.It is high by forming the hardness through ceramic on the surface of magnesium substrates
Hydroxide layer film, can get that rust-preventing characteristic is excellent and acoustic characteristic good sound equipment magnesium oscillating plate.
It, can be comprising being cut by trimming process when being set as when carrying out the composition of antirust treatment step after trimming process
Hydroxide layer is formed in the whole surface of the end face of disconnected magnesium substrates, therefore does not need the endface after antirust treatment step
Reason.Therefore, compared with the method for carrying out antirust treatment step before trimming process, sound equipment is big with the manufacture efficiency of magnesium oscillating plate
Promoted to amplitude.
When being set as carrying out the composition of antirust treatment step before trimming process, by carrying out antirust treatment step, magnesium
The hardness of foil is promoted, and can prevent deformation etc..It therefore, can also be accurately even with thin magnesium foil as magnesium substrates
Carry out trimming process.Therefore, it can manufacture comprising very thin magnesium foil through the good sound equipment magnesium of light-weighted acoustic characteristic
Oscillating plate.
Description of the drawings
Fig. 1 is sound equipment magnesium of the sound equipment manufactured by the manufacturing method of magnesium oscillating plate schematically shown through the invention
The sectional view of the surface texture of oscillating plate
Fig. 2 is to illustrate the alternative photo of the attached drawing of the method for the compression test in the embodiment of the present invention and comparative example
Fig. 3 is the brine spray of each sample of the embodiment 1 and 1~comparative example of comparative example 3 after indicating salt spraytest
The alternative photo of attached drawing of the state of the front and back each sample of experiment
Fig. 4 is the chart of the compression test result for the result for indicating the hardness test using intrusion
Specific implementation mode
Hereinafter, while with reference to attached drawing, embodiments of the present invention will be described.
Fig. 1 is to schematically show the manufacturing method of the sound equipment magnesium oscillating plate by present embodiment (hereinafter, suitable for claiming
For " manufacturing method of oscillating plate ") manufactured by sound equipment magnesium oscillating plate (hereinafter, suitable for be known as " magnesium oscillating plate ") structure
Sectional view.
Antirust treatment step is carried out under the condition of high voltage higher than standard atmospheric pressure, it thus as shown in Figure 1, can be in magnesium substrates
Hydroxide layer 2A is formed on 1 surface, and reaction is made to carry out forming hydroxide layer until the inside of magnesium substrates 1
2B.By carrying out the reaction of antirust treatment step under high pressure, the case where with being reacted under standard atmosphere condition
It compares, forms the hydroxide layer 2 (2A, 2B) of stabilization fine and closely woven and with high hardness.In description of the present embodiment, when not to hydrogen
When oxide skin(coating) 2A and hydroxide layer 2B is distinguished, it is denoted as hydroxide layer 2.
Hydroxide layer 2 be formed on 1 surface of magnesium substrates using magnesium hydroxide as the table of the hydroxide of principal component
Surface treatment layer has very high hardness.If carrying out antirust treatment step, magnesium-based under high pressure with time enough
Material 1 all becomes the hydroxide of pulp.Therefore, it is known that by antirust treatment step, form the hydroxide on the surface of magnesium substrates 1
Nitride layer 2A, simultaneous reactions carry out forming hydroxide layer 2B until the inside of magnesium substrates 1.
In general, thickness of the thickness of internal hydroxide layer 2B much smaller than the hydroxide layer 2A on surface.Therefore, it can incite somebody to action
The thickness of the thickness of magnesium substrates 1 before antirust treatment step and the magnesium substrates 1 comprising hydroxide layer 2 after antirust treatment step
Difference be evaluated as the thickness of hydroxide layer 2.
Magnesium substrates 1 are immersed in the aftermentioned processing solution in container, and are controlled at higher than standard atmospheric pressure appropriate
Pressure condition (condition of high voltage), and temperature in container is remained into aftermentioned temperature appropriate to carry out antirust treatment step.
In order to make the implementation of the antirust treatment step under condition of high voltage become easy, antirust treatment step is carried out preferably in closed container
Suddenly.If magnesium substrates 1 are immersed in aftermentioned processing solution, and closed container is remained under condition of high voltage or temperature appropriate
Degree, then reacted on the surface of magnesium substrates 1, and forms hydroxide layer 2.
In order to confirm the state for the hydroxide layer 2 being formed on 1 surface of magnesium substrates on one side, formed on one side desired by having
Thickness hydroxide layer 2, as long as the time of antirust treatment step be set as time enough.Time enough is according to institute
The reaction conditions such as the thickness and temperature, pressure, solution concentration, solution volume of the hydroxide layer 2 of making and change, but it is logical
Often become 0.5 hour~20 hours or so.
For forming the viewpoint of hydroxide layer with high hardness 2 that is fine and closely woven and stablizing, the reaction in antirust treatment step
Preferably 50 DEG C or more of temperature, 500 DEG C of ranges below, more preferable 100 DEG C or more, 400 DEG C of ranges below, and then more preferably
150 DEG C or more, 300 DEG C or less.
In the same manner as reaction temperature, for forming the viewpoint of hydroxide layer with high hardness 2 that is fine and closely woven and stablizing, antirust
It is more than pressure preferably 1.1 atmospheric pressure in processing step, 350 atmospheric pressure hereinafter, it is more than more preferable 1.5 atmospheric pressure, 200
A atmospheric pressure is hereinafter, in turn more than more preferable 5 atmospheric pressure, below 100 atmospheric pressure.
The plate thickness of magnesium substrates 1 before being handled by antirust treatment step is just to using the sound made by this magnesium substrates
Ring for assigning the viewpoint of good vibration characteristics with magnesium oscillating plate, preferably 1mm hereinafter, more preferably 0.1mm (1000 μm) hereinafter,
And then more preferably 0.01mm (100 μm) is below.By carrying out antirust treatment step, the hardness of magnesium substrates 1 before trimming process
It gets higher, therefore the precision improvement of trimming process.Therefore, even with very thin magnesium substrates 1, sound can also accurately be made
It rings and uses magnesium oscillating plate.For example, can be 60 μm or less by thickness, 50 μm or less, 30 μm of such as the following magnesium foils are as magnesium substrates 1.
By carrying out antirust treatment step, the case hardness of magnesium substrates can be improved.Therefore, it can be used plate thickness thinner than before
Material makes the sound equipment magnesium oscillating plate for having enough intensity.Therefore, the further lightweight of sound equipment magnesium oscillating plate can be made, and
Acoustic characteristic can be promoted.
For realizing the viewpoint of good rust-preventing characteristic and matching with the plate thickness of magnesium substrates 1, by antirust treatment step
It is formed in preferably 0.01 μm or more, 20 μm or less of the thickness of the surface of magnesium substrates 1 and the hydroxide layer 2 of inside.Furthermore hydrogen-oxygen
The thickness of compound layer 2 is assessed by the difference of the thickness of the plate comprising magnesium substrates 1 before and after antirust treatment step.
[magnesium substrates]
As magnesium substrates, it is 99% pure magnesium or magnesium base alloy that purity, which can be used,.As magnesium base alloy, such as there is Mg-Al-
Zn systems alloy, Mg-Zn-Zr systems alloy, Mg-Al systems alloy, Mg- rare earth elements system alloy etc..
As Mg-Al-Zn alloy, specifically, having AZ31A, AZ31B, AZ31C, AZ61A, AZ80A, AZ91 etc..Make
For Mg-Zn-Zr systems alloy, specifically, having ZK51A, ZK61A, ZK60, M6, M5, M4 etc..As Mg-Al systems alloy, specifically
For, there is AM100A etc..
As Mg- rare earth elements system alloy, specifically, having EZ33A, ZE41A, QE22A etc., by adding terres rares
Element (RE：As mischmetal (misch metal) or didymium (didymium), mainly Ce and/or Nd), MgRE
In grid magnesium substrates shape crystalline substance goes out to crystal boundary, and creep resistant is especially promoted.In addition, by adding Ag or Y, endurance is obviously improved.
[processing solution]
For making the viewpoint that the reaction time is done sth. in advance, the place for forming hydroxide layer in the whole surface of magnesium substrates
Manage the aqueous solution of the preferred alkalinity of solution.As the ingredient of alkalinity, sodium hydroxide, potassium hydroxide etc. can be enumerated.It is contained in aqueous solution
The concentration of the ingredient of some alkalinity preferably 1 mass of mass %~50 %, more more preferable 5 mass %~30 mass %, so it is more excellent
Select 8 mass of mass %~20 %.
Even if the pure water of the ingredient without alkalinity is used as processing solution, hydrogen-oxygen can also be formed on the surface of magnesium substrates
Compound layer.But in the case, compared with the aqueous solution of alkalinity, the formation of hydroxide layer needs for a long time.
When using the aqueous solution of alkalinity as the processing solution, magnesium substrates are taken out from the processing solution, anti-
Surface is washed after rust processing step, and removes the aqueous solution of the alkalinity on surface.
The manufacturing method of the sound equipment of present embodiment magnesium oscillating plate is implemented before or after the antirust treatment step
The sound equipment trimming process of the magnesium substrates of magnesium oscillating plate is cut from the matrix band comprising magnesium or the magnesium substrates of magnesium base alloy.This
Place, so-called matrix band refer to the magnesium substrates for carrying out compression moulding etc., and being formed as the state of domed shape isotactic setting shape.
When carrying out antirust treatment step after trimming process, the magnesium-based cut off can included after trimming process
Hydroxide layer is formed in the magnesium substrates whole surface of the end face of material.By carrying out antirust treatment step after trimming process,
It need not be to prevent from generating the end face processing step of rust from end face, therefore manufacture efficiency is significantly promoted.
When carrying out antirust treatment step before trimming process, hard hydroxide can be formed on the surface of magnesium substrates
Layer 2.First magnesium substrates 1 are assigned with enough hardness in antirust treatment step before trimming process, thus can prevent from walking in trimming
Magnesium substrates 1 deform in rapid.That is, for preventing the viewpoint of deformation, it may be said that have and first implement antirust treatment before trimming process
The benefit of step.By carrying out antirust treatment step before trimming process, it can be used very thin foil as magnesium substrates 1,
And sound equipment can be made to be lightened with magnesium oscillating plate by the filming of magnesium substrates 1.
The sound equipment of present embodiment with the manufacturing method of magnesium oscillating plate for the viewpoint for promoting ingenuity, can also be in institute
After stating antirust treatment step, the surface of electrodeposition coating or the magnesium substrates for blowing attached application etc. to being formed with hydroxide layer is utilized
It is coloured.
Embodiment
Hereinafter, the present invention is further illustrated by embodiment, but the present invention is not limited to these embodiments.
[embodiment 1]
Using the plank that thickness is 45 μm (0.045mm), the vibration plate shape for the dome type for being configured to diameter 25mm is made
Magnesium substrates sample.
With following conditions, antirust treatment step is carried out to the sample in closed container, and on the surface of magnesium substrates
Upper formation hydroxide layer.In the present embodiment 1, obtains and be respectively formed with the hydrogen-oxygen that thickness is 3 μm on the surface of its both sides
The magnesium substrates of compound layer.
(reaction condition)
React important document：The sodium hydrate aqueous solution of 10 mass %
Reaction temperature：150℃
Reaction pressure：10 atmospheric pressure (condition of high voltage)
Reaction time：5 hours
Reaction unit：Stainless steel closed container
The plate thickness of magnesium substrates before antirust treatment step is 45 μm (0.045mm), the magnesium substrates after antirust treatment step
Plate thickness is 51 μm.According to the difference of the plate thickness before and after antirust treatment step, magnesium substrates will be formed in by antirust treatment step
The total of the thickness of hydroxide layer on two sides is evaluated as 6 μm (being on one side 3 μm).Due to obtaining hydroxide layer securely
The magnesium substrates of attachment on the surface thereof, it may thus be appreciated that being also formed with hydroxide layer inside it.
[comparative example 1]
It makes and is carried out by anodic oxidation and is formed for its surface by condition below using sample same as Example 1
There are the magnesium substrates of anode oxide film.
[comparative example 2]
Using sample same as Example 1, in stainless steel open container under the conditions of normal pressure (standard atmospheric pressure)
Reacted to replace being reacted under high pressure in stainless steel closed container, in addition to this, with 1 phase of embodiment
Same condition makes the magnesium substrates for being formed with hydroxide layer on the surface thereof.
[comparative example 3]
Use the sample of the magnesium substrates for not carrying out antirust treatment to surface before the antirust treatment step of embodiment 1.
[appraisal procedure]
In order to which the resistance to rust-preventing characteristic and hardness to the embodiment 1 and 1~comparative example of comparative example 3 are assessed, use is following
Test method.
1. salt spraytest (continuous spray testing)
(1) test method：According to Japanese Industrial Standards (Japanese Industrial Standards, JIS) Z 2371
Salt spraytest method.
(2) experimental condition：Neutral salt spray (pH is 6.5~7.2), spray chamber's temperature are 35 ± 2 DEG C, the saturation of the air is held
The temperature of water in device is 47 ± 2 DEG C, the brine spray time is 48 hours
(3) experimental rig：Testing machine (SUGA Test Machine) (share) must be congratulated to manufacture, salt spray tester
STP-90V2
2. hardness test (utilizes the Determination of Hardness of indentation, Vickers hardness (vickers hardness))
(1) test method：Hardness is measured by being pressed into.
(2) experimental condition：Test force 10mN, test force increase by 20 seconds, and creep 5 seconds, test force reduces 20 seconds
(3) experimental rig：The film hardness meter HM500 of Fei Xier instruments (Fischer Instruments) manufacture
3. utilizing the hardness test (compression test) of intrusion
(1) test method：Trial target is compressed using the platen of plane.
Fig. 2 is the alternative photo of attached drawing the case where indicating compression test.It as shown in this figure, will be real in such a way that dome is upward
The formed products 10 for applying the magnesium substrates of example 1 and 1~comparative example of comparative example 3 are positioned on pedestal 30, make pressing member 20 towards under vertical
Direction is moved, and the point that test force is become to 01N is set as the position of displacement 0mm, and reads the experiment on the position of displacement 1.2mm
Power, i.e., from formed products 10 be applied to the vertical direction in pressing member 20 to power size.Pressing member 20 will be made towards vertical
The test speed of lower direction movement is set as 1mm/min.
The antirust of described 1~described 3 test method to the magnesium substrates of embodiment 1 and 1~comparative example of comparative example 3 will be used
The result that property and hardness are assessed is shown in Table 1.
[table 1]
000002
※HVpl：German Standard chemistry meeting (Deutsche relative to penetration hardness (Indentation hardness)
Industrie Normen, DIN) specification Vickers scaled value, calculated average value is measured according to multiple Vickers reference plates.
Test force (N) on the position of ※ ※ displacements 1.2mm.
1. brine spray
Fig. 3 is each sample with embodiment 1 and 1~comparative example of comparative example 3 later before indicating salt spraytest
The alternative photo of attached drawing of state after salt spraytest.Embodiment 1 and comparative example 3 have carried out brine spray to three magnesium substrates
Experiment, comparative example 1 and comparative example 2 have carried out salt spraytest to four magnesium substrates.
As shown in figure 3, the magnesium substrates of comparative example 1 and comparative example 2 and the magnesium substrates for the comparative example 3 that surface treatment is not carried out are same
Sample, comprehensively produce rust.Relative to these comparative examples, the magnesium substrates of embodiment 1 are not also seen after salt spraytest
Rust generates, and with after salt spraytest before salt spraytest, appearance is almost unchanged.According to this as a result, by
Antirust treatment step is carried out under condition of high voltage, the rust-preventing characteristic of the hydroxide layer on surface becomes good, and the corrosion resistance of magnesium substrates is (anti-
Rust property) it is promoted.
2. hardness test (is tested) using the Determination of Hardness of indentation
The result for using the method to measure hardness to embodiment 1 and 1~comparative example of comparative example 3 is shown in Table 1.Table 1
Value be respectively measure three samples result average value.
According to shown in table 1 as a result, with not to surface carry out antirust treatment comparative example 3 (untreated magnesium substrates) phase
Than the hardness for forming the embodiment 1 of hydroxide layer on the surface of magnesium substrates under high pressure probably increases nearly 3 times.
In contrast, the hardness for the comparative example 1 that the surface of magnesium substrates is handled by anodic oxidation be less than than
Compared with example 3.In addition, the comparison of hydroxide layer is formed under not condition of high voltage but under condition of normal pressure on the surface of magnesium substrates
The hardness of example 2 is identical degree with comparative example 3 (untreated magnesium substrates).
3. utilizing the hardness test (compression test) of intrusion
Fig. 4 is the chart for indicating compression test result, and horizontal axis indicates that drafts, the longitudinal axis indicate the test force of this time point.
By on the position of the drafts 1.2mm (displacement 1.2mm) of Fig. 4 read test force be shown in Table 1.
According to compression test as a result, forming hydroxide on the surface of magnesium substrates by antirust treatment step
The embodiment 1 of layer is most hard.The comparative example 1 and comparative example being surface-treated under not condition of high voltage but under condition of normal pressure
Although comparative example 3 of 2 hardness than not being surface-treated increases, if being compared with embodiment 1, the increase of test force
It measures small.Specifically, in embodiment 1, compared with comparative example 3, test force increases 1.1N, in contrast, in comparative example 1 and ratio
Compared in example 2, only increase 0.3N and 0.4N.
It, can be by surface according to embodiment 1 and 1~comparative example of comparative example 3 as a result, use the manufacturing method of the present invention
On be formed with the magnesium substrates (embodiment 1) of hydroxide layer and make and have the sound equipment magnesium oscillating plate of property below.
(1) carry out as defined in salt spraytest as a result, being formed with the magnesium substrates (embodiment of hydroxide layer on surface
1) it does not find to get rusty a little by 48 hours time points, therefore has high rust-preventing characteristic (corrosion resistance).
(2) hardness that the surface of the magnesium substrates (embodiment 1) of hydroxide layer is formed on surface is higher than untreated magnesium
The surface of base material (comparative example 3), therefore promoted as the characteristic required by vibrating body.
(3) due to hardness height, magnesium substrates can be subject to filming to make sound equipment be lightened with magnesium oscillating plate.Thus expect
The promotion of acoustic characteristic.
Industrial utilizability
The manufacturing method of sound equipment according to the present invention magnesium oscillating plate promotes rust-preventing characteristic, and the intensity of magnesium substrates increases,
Thus it can be used the magnesium substrates itself in sound equipment magnesium oscillating plate thinning and be subject to lightweight.
In addition, by carrying out antirust treatment after trimming process, end face processing step can be omitted, and can significantly be promoted
The productivity that sound equipment is manufactured with magnesium oscillating plate.
The explanation of symbol
1：Magnesium substrates
2、2A、2B：Hydroxide layer
10：Formed products
20：Pressing member
30：Pedestal
Claims (9)
1. a kind of sound equipment manufacturing method of magnesium oscillating plate comprising under the condition of high voltage higher than standard atmospheric pressure, impregnating
The antirust treatment step of hydroxide layer is formed on the surface of magnesium substrates in the aqueous solution of alkalinity.
2. the sound equipment according to claim 1 manufacturing method of magnesium oscillating plate, wherein the antirust treatment step is closed
It is carried out in container.
3. the sound equipment according to claim 2 manufacturing method of magnesium oscillating plate, wherein anti-in the antirust treatment step
It is 50 DEG C or more, in 300 DEG C or less of range to answer temperature, pressure for it is more than 1.1 atmospheric pressure, 350 atmospheric pressure models below
In enclosing.
4. the manufacturing method of sound equipment oscillating plate according to any one of claim 1 to 3, wherein at by the antirust
Reason step is 1mm or less come the plate thickness of the magnesium substrates before being handled.
5. the sound equipment according to any one of claim 1 to 4 manufacturing method of magnesium oscillating plate, wherein the antirust treatment
Step is 0.01 μm or more, forms the hydroxide in 20 μm or less of range in thickness on the magnesium substrates surface
Layer.
6. the sound equipment according to any one of claim 1 to 5 manufacturing method of magnesium oscillating plate, wherein at the antirust
Before managing step, including
The trimming process of magnesium substrates is cut from the matrix band comprising magnesium or the magnesium substrates of magnesium base alloy.
7. the sound equipment according to any one of claim 1 to 5 manufacturing method of magnesium oscillating plate, wherein at the antirust
After managing step, including
The trimming process of magnesium substrates is cut from the matrix band comprising magnesium or the magnesium substrates of magnesium base alloy.
8. the sound equipment according to any one of claim 1 to 7 manufacturing method of magnesium oscillating plate, wherein the antirust treatment
Step is the hydroxide layer to be formed on the surface of the magnesium substrates, and form hydroxide in the inside of the magnesium substrates
The step of nitride layer.
9. a kind of sound equipment magnesium oscillating plate, it is characterised in that：Hydroxide layer, and the hydrogen are formed on the surface of magnesium substrates
Oxide skin(coating) is to form the person until the inside of the magnesium substrates.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015217120A JP5978376B1 (en) | 2015-11-04 | 2015-11-04 | Method for manufacturing acoustic magnesium diaphragm and magnesium diaphragm for acoustic |
| JP2015-217120 | 2015-11-04 | ||
| PCT/JP2016/082420 WO2017078010A1 (en) | 2015-11-04 | 2016-11-01 | Method for manufacturing acoustic magnesium diaphragm and acoustic magnesium diaphragm |
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| CN108353230A true CN108353230A (en) | 2018-07-31 |
| CN108353230B CN108353230B (en) | 2020-09-15 |
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| JP (1) | JP5978376B1 (en) |
| CN (1) | CN108353230B (en) |
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| WO2019098225A1 (en) * | 2017-11-16 | 2019-05-23 | Ｔｏｄａ株式会社 | Acoustic diaphragm and speaker using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000064057A (en) * | 1998-08-21 | 2000-02-29 | Stc:Kk | Surface treatment method of magnesium material or magnesium alloy material |
| CN2595119Y (en) * | 2003-01-03 | 2003-12-24 | 美隆电器厂股份有限公司 | Loudspeaker structure |
| CN1599511A (en) * | 2003-08-22 | 2005-03-23 | 日本先锋公司 | Magnesium diaphragm, method of manufacturing the same, and speaker apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5634296A (en) * | 1979-08-29 | 1981-04-06 | Sony Corp | Electroacoustic transducer |
| JPS5975795A (en) * | 1982-10-22 | 1984-04-28 | Foster Denki Kk | Diaphragm for speaker and its manufacture |
| JPH02257799A (en) * | 1989-03-30 | 1990-10-18 | Kenwood Corp | Diaphragm of speaker and voice coil bobbin |
| JP3945554B2 (en) * | 1998-11-09 | 2007-07-18 | リード企業株式会社 | Apparatus and method for manufacturing speaker diaphragm |
| JP2007068017A (en) * | 2005-09-01 | 2007-03-15 | Pioneer Electronic Corp | Structural component for speaker device and speaker device |
| JP5557839B2 (en) * | 2009-08-20 | 2014-07-23 | 独立行政法人産業技術総合研究所 | Surface treatment method for aluminum-containing magnesium alloy substrate |
| JP5705054B2 (en) * | 2011-07-26 | 2015-04-22 | 独立行政法人産業技術総合研究所 | Magnesium alloy material and surface treatment method of magnesium alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000064057A (en) * | 1998-08-21 | 2000-02-29 | Stc:Kk | Surface treatment method of magnesium material or magnesium alloy material |
| CN2595119Y (en) * | 2003-01-03 | 2003-12-24 | 美隆电器厂股份有限公司 | Loudspeaker structure |
| CN1599511A (en) * | 2003-08-22 | 2005-03-23 | 日本先锋公司 | Magnesium diaphragm, method of manufacturing the same, and speaker apparatus |
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| TWI626317B (en) | 2018-06-11 |
| JP2017088922A (en) | 2017-05-25 |
| CN108353230B (en) | 2020-09-15 |
| WO2017078010A1 (en) | 2017-05-11 |
| TW201726938A (en) | 2017-08-01 |
| JP5978376B1 (en) | 2016-08-24 |
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